TextureTest.cpp

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Author : Tobin Ehlis
Date : 2019-10-23 16:18:57
Hash : 7af2676b
Message : Fix TextureAttachment support for unsized DS formats Unsized DS formats should not pick up support from ES3 automatically. Also unsized DEPTH COMPONENT textures should not be allowed as texture attachments without also having support for GL_ANGLE_depth_texture or GL_OES_depth_texture extensions. This change modifies some unsized formats to require extension support for TextureAttachment use. There are a couple of tests bugs that were exposed by this change so updated those tests as well. This CL only changes TextureAttachment support, but it's quite possible that renderbuffer (and texture) support may also need to be updated. Will attempt that in a follow-on. Bug: angleproject:3952 Change-Id: I75d15330dc418c421cd2855135e1e8100a89b2e8 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1877135 Reviewed-by: Tobin Ehlis <tobine@google.com> Reviewed-by: Jamie Madill <jmadill@chromium.org> Commit-Queue: Jamie Madill <jmadill@chromium.org>
src/tests/gl_tests/TextureTest.cpp
//
// Copyright 2015 The ANGLE Project Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
//

#include "common/mathutil.h"
#include "test_utils/ANGLETest.h"
#include "test_utils/gl_raii.h"

using namespace angle;

namespace
{

constexpr GLuint kPixelTolerance     = 1u;
constexpr GLfloat kPixelTolerance32F = 0.01f;

// Take a pixel, and reset the components not covered by the format to default
// values. In particular, the default value for the alpha component is 255
// (1.0 as unsigned normalized fixed point value).
// For legacy formats, the components may be reordered to match the color that
// would be created if a pixel of that format was initialized from the given color
GLColor SliceFormatColor(GLenum format, GLColor full)
{
    switch (format)
    {
        case GL_RED:
            return GLColor(full.R, 0, 0, 255u);
        case GL_RG:
            return GLColor(full.R, full.G, 0, 255u);
        case GL_RGB:
            return GLColor(full.R, full.G, full.B, 255u);
        case GL_RGBA:
            return full;
        case GL_LUMINANCE:
            return GLColor(full.R, full.R, full.R, 255u);
        case GL_ALPHA:
            return GLColor(0, 0, 0, full.R);
        case GL_LUMINANCE_ALPHA:
            return GLColor(full.R, full.R, full.R, full.G);
        default:
            EXPECT_TRUE(false);
            return GLColor::white;
    }
}

// As above, for 32F colors
GLColor32F SliceFormatColor32F(GLenum format, GLColor32F full)
{
    switch (format)
    {
        case GL_RED:
            return GLColor32F(full.R, 0.0f, 0.0f, 1.0f);
        case GL_RG:
            return GLColor32F(full.R, full.G, 0.0f, 1.0f);
        case GL_RGB:
            return GLColor32F(full.R, full.G, full.B, 1.0f);
        case GL_RGBA:
            return full;
        case GL_LUMINANCE:
            return GLColor32F(full.R, full.R, full.R, 1.0f);
        case GL_ALPHA:
            return GLColor32F(0.0f, 0.0f, 0.0f, full.R);
        case GL_LUMINANCE_ALPHA:
            return GLColor32F(full.R, full.R, full.R, full.G);
        default:
            EXPECT_TRUE(false);
            return GLColor32F(1.0f, 1.0f, 1.0f, 1.0f);
    }
}

class TexCoordDrawTest : public ANGLETest
{
  protected:
    TexCoordDrawTest() : ANGLETest(), mProgram(0), mFramebuffer(0), mFramebufferColorTexture(0)
    {
        setWindowWidth(128);
        setWindowHeight(128);
        setConfigRedBits(8);
        setConfigGreenBits(8);
        setConfigBlueBits(8);
        setConfigAlphaBits(8);
    }

    virtual const char *getVertexShaderSource()
    {
        return R"(precision highp float;
attribute vec4 position;
varying vec2 texcoord;

void main()
{
    gl_Position = vec4(position.xy, 0.0, 1.0);
    texcoord = (position.xy * 0.5) + 0.5;
})";
    }

    virtual const char *getFragmentShaderSource() = 0;

    virtual void setUpProgram()
    {
        const char *vertexShaderSource   = getVertexShaderSource();
        const char *fragmentShaderSource = getFragmentShaderSource();

        mProgram = CompileProgram(vertexShaderSource, fragmentShaderSource);
        ASSERT_NE(0u, mProgram);
        ASSERT_GL_NO_ERROR();
    }

    void testSetUp() override { setUpFramebuffer(); }

    void testTearDown() override
    {
        glBindFramebuffer(GL_FRAMEBUFFER, 0);
        glDeleteFramebuffers(1, &mFramebuffer);
        glDeleteTextures(1, &mFramebufferColorTexture);
        glDeleteProgram(mProgram);
    }

    void setUpFramebuffer()
    {
        // We use an FBO to work around an issue where the default framebuffer applies SRGB
        // conversion (particularly known to happen incorrectly on Intel GL drivers). It's not
        // clear whether this issue can even be fixed on all backends. For example GLES 3.0.4 spec
        // section 4.4 says that the format of the default framebuffer is entirely up to the window
        // system, so it might be SRGB, and GLES 3.0 doesn't have a "FRAMEBUFFER_SRGB" to turn off
        // SRGB conversion like desktop GL does.
        // TODO(oetuaho): Get rid of this if the underlying issue is fixed.
        glGenFramebuffers(1, &mFramebuffer);
        glBindFramebuffer(GL_FRAMEBUFFER, mFramebuffer);

        glGenTextures(1, &mFramebufferColorTexture);
        glBindTexture(GL_TEXTURE_2D, mFramebufferColorTexture);
        glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, getWindowWidth(), getWindowHeight(), 0, GL_RGBA,
                     GL_UNSIGNED_BYTE, nullptr);
        glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D,
                               mFramebufferColorTexture, 0);
        ASSERT_GL_NO_ERROR();
        ASSERT_GLENUM_EQ(GL_FRAMEBUFFER_COMPLETE, glCheckFramebufferStatus(GL_FRAMEBUFFER));
        glBindTexture(GL_TEXTURE_2D, 0);
    }

    // Returns the created texture ID.
    GLuint create2DTexture()
    {
        GLuint texture2D;
        glGenTextures(1, &texture2D);
        glBindTexture(GL_TEXTURE_2D, texture2D);
        glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 1, 1, 0, GL_RGBA, GL_UNSIGNED_BYTE, nullptr);
        EXPECT_GL_NO_ERROR();
        return texture2D;
    }

    GLuint mProgram;
    GLuint mFramebuffer;

  private:
    GLuint mFramebufferColorTexture;
};

class Texture2DTest : public TexCoordDrawTest
{
  protected:
    Texture2DTest() : TexCoordDrawTest(), mTexture2D(0), mTexture2DUniformLocation(-1) {}

    const char *getFragmentShaderSource() override
    {
        return R"(precision highp float;
uniform sampler2D tex;
varying vec2 texcoord;

void main()
{
    gl_FragColor = texture2D(tex, texcoord);
})";
    }

    virtual const char *getTextureUniformName() { return "tex"; }

    void setUpProgram() override
    {
        TexCoordDrawTest::setUpProgram();
        mTexture2DUniformLocation = glGetUniformLocation(mProgram, getTextureUniformName());
        ASSERT_NE(-1, mTexture2DUniformLocation);
    }

    void testSetUp() override
    {
        TexCoordDrawTest::testSetUp();
        mTexture2D = create2DTexture();

        ASSERT_GL_NO_ERROR();
    }

    void testTearDown() override
    {
        glDeleteTextures(1, &mTexture2D);
        TexCoordDrawTest::testTearDown();
    }

    // Tests CopyTexSubImage with floating point textures of various formats.
    void testFloatCopySubImage(int sourceImageChannels, int destImageChannels)
    {
        setUpProgram();

        if (getClientMajorVersion() < 3)
        {
            ANGLE_SKIP_TEST_IF(!IsGLExtensionEnabled("GL_EXT_texture_storage") ||
                               !IsGLExtensionEnabled("GL_OES_texture_float"));

            ANGLE_SKIP_TEST_IF((sourceImageChannels < 3 || destImageChannels < 3) &&
                               !IsGLExtensionEnabled("GL_EXT_texture_rg"));

            ANGLE_SKIP_TEST_IF(destImageChannels == 3 &&
                               !IsGLExtensionEnabled("GL_CHROMIUM_color_buffer_float_rgb"));

            ANGLE_SKIP_TEST_IF(destImageChannels == 4 &&
                               !IsGLExtensionEnabled("GL_CHROMIUM_color_buffer_float_rgba"));

            ANGLE_SKIP_TEST_IF(destImageChannels <= 2);
        }
        else
        {
            ANGLE_SKIP_TEST_IF(!IsGLExtensionEnabled("GL_color_buffer_float"));

            ANGLE_SKIP_TEST_IF(destImageChannels == 3 &&
                               !IsGLExtensionEnabled("GL_CHROMIUM_color_buffer_float_rgb"));
        }

        // clang-format off
        GLfloat sourceImageData[4][16] =
        {
            { // R
                1.0f,
                0.0f,
                0.0f,
                1.0f
            },
            { // RG
                1.0f, 0.0f,
                0.0f, 1.0f,
                0.0f, 0.0f,
                1.0f, 1.0f
            },
            { // RGB
                1.0f, 0.0f, 0.0f,
                0.0f, 1.0f, 0.0f,
                0.0f, 0.0f, 1.0f,
                1.0f, 1.0f, 0.0f
            },
            { // RGBA
                1.0f, 0.0f, 0.0f, 1.0f,
                0.0f, 1.0f, 0.0f, 1.0f,
                0.0f, 0.0f, 1.0f, 1.0f,
                1.0f, 1.0f, 0.0f, 1.0f
            },
        };
        // clang-format on

        GLenum imageFormats[] = {
            GL_R32F,
            GL_RG32F,
            GL_RGB32F,
            GL_RGBA32F,
        };

        GLenum sourceUnsizedFormats[] = {
            GL_RED,
            GL_RG,
            GL_RGB,
            GL_RGBA,
        };

        GLuint textures[2];

        glGenTextures(2, textures);

        GLfloat *imageData         = sourceImageData[sourceImageChannels - 1];
        GLenum sourceImageFormat   = imageFormats[sourceImageChannels - 1];
        GLenum sourceUnsizedFormat = sourceUnsizedFormats[sourceImageChannels - 1];
        GLenum destImageFormat     = imageFormats[destImageChannels - 1];

        glBindTexture(GL_TEXTURE_2D, textures[0]);
        if (getClientMajorVersion() >= 3)
        {
            glTexStorage2D(GL_TEXTURE_2D, 1, sourceImageFormat, 2, 2);
        }
        else
        {
            glTexStorage2DEXT(GL_TEXTURE_2D, 1, sourceImageFormat, 2, 2);
        }
        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
        glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, 2, 2, sourceUnsizedFormat, GL_FLOAT, imageData);

        if (sourceImageChannels < 3 && !IsGLExtensionEnabled("GL_EXT_texture_rg"))
        {
            // This is not supported
            ASSERT_GL_ERROR(GL_INVALID_OPERATION);
        }
        else
        {
            ASSERT_GL_NO_ERROR();
        }

        GLuint fbo;
        glGenFramebuffers(1, &fbo);
        glBindFramebuffer(GL_FRAMEBUFFER, fbo);
        glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, textures[0], 0);

        glBindTexture(GL_TEXTURE_2D, textures[1]);
        if (getClientMajorVersion() >= 3)
        {
            glTexStorage2D(GL_TEXTURE_2D, 1, destImageFormat, 2, 2);
        }
        else
        {
            glTexStorage2DEXT(GL_TEXTURE_2D, 1, destImageFormat, 2, 2);
        }
        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);

        glCopyTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, 0, 0, 2, 2);
        ASSERT_GL_NO_ERROR();

        glBindFramebuffer(GL_FRAMEBUFFER, 0);
        drawQuad(mProgram, "position", 0.5f);

        int testImageChannels = std::min(sourceImageChannels, destImageChannels);

        EXPECT_PIXEL_COLOR_EQ(0, 0, GLColor::red);
        if (testImageChannels > 1)
        {
            EXPECT_PIXEL_EQ(getWindowHeight() - 1, 0, 0, 255, 0, 255);
            EXPECT_PIXEL_EQ(getWindowHeight() - 1, getWindowWidth() - 1, 255, 255, 0, 255);
            if (testImageChannels > 2)
            {
                EXPECT_PIXEL_EQ(0, getWindowWidth() - 1, 0, 0, 255, 255);
            }
        }

        glDeleteFramebuffers(1, &fbo);
        glDeleteTextures(2, textures);

        ASSERT_GL_NO_ERROR();
    }

    GLuint mTexture2D;
    GLint mTexture2DUniformLocation;
};

class Texture2DTestES3 : public Texture2DTest
{
  protected:
    Texture2DTestES3() : Texture2DTest() {}

    const char *getVertexShaderSource() override
    {
        return "#version 300 es\n"
               "out vec2 texcoord;\n"
               "in vec4 position;\n"
               "void main()\n"
               "{\n"
               "    gl_Position = vec4(position.xy, 0.0, 1.0);\n"
               "    texcoord = (position.xy * 0.5) + 0.5;\n"
               "}\n";
    }

    const char *getFragmentShaderSource() override
    {
        return "#version 300 es\n"
               "precision highp float;\n"
               "uniform highp sampler2D tex;\n"
               "in vec2 texcoord;\n"
               "out vec4 fragColor;\n"
               "void main()\n"
               "{\n"
               "    fragColor = texture(tex, texcoord);\n"
               "}\n";
    }

    void testSetUp() override
    {
        Texture2DTest::testSetUp();
        setUpProgram();
    }
};

class Texture2DIntegerAlpha1TestES3 : public Texture2DTest
{
  protected:
    Texture2DIntegerAlpha1TestES3() : Texture2DTest() {}

    const char *getVertexShaderSource() override
    {
        return "#version 300 es\n"
               "out vec2 texcoord;\n"
               "in vec4 position;\n"
               "void main()\n"
               "{\n"
               "    gl_Position = vec4(position.xy, 0.0, 1.0);\n"
               "    texcoord = (position.xy * 0.5) + 0.5;\n"
               "}\n";
    }

    const char *getFragmentShaderSource() override
    {
        return "#version 300 es\n"
               "precision highp float;\n"
               "uniform highp isampler2D tex;\n"
               "in vec2 texcoord;\n"
               "out vec4 fragColor;\n"
               "void main()\n"
               "{\n"
               "    vec4 green = vec4(0, 1, 0, 1);\n"
               "    vec4 black = vec4(0, 0, 0, 0);\n"
               "    fragColor = (texture(tex, texcoord).a == 1) ? green : black;\n"
               "}\n";
    }

    void testSetUp() override
    {
        Texture2DTest::testSetUp();
        setUpProgram();
    }
};

class Texture2DUnsignedIntegerAlpha1TestES3 : public Texture2DTest
{
  protected:
    Texture2DUnsignedIntegerAlpha1TestES3() : Texture2DTest() {}

    const char *getVertexShaderSource() override
    {
        return "#version 300 es\n"
               "out vec2 texcoord;\n"
               "in vec4 position;\n"
               "void main()\n"
               "{\n"
               "    gl_Position = vec4(position.xy, 0.0, 1.0);\n"
               "    texcoord = (position.xy * 0.5) + 0.5;\n"
               "}\n";
    }

    const char *getFragmentShaderSource() override
    {
        return "#version 300 es\n"
               "precision highp float;\n"
               "uniform highp usampler2D tex;\n"
               "in vec2 texcoord;\n"
               "out vec4 fragColor;\n"
               "void main()\n"
               "{\n"
               "    vec4 green = vec4(0, 1, 0, 1);\n"
               "    vec4 black = vec4(0, 0, 0, 0);\n"
               "    fragColor = (texture(tex, texcoord).a == 1u) ? green : black;\n"
               "}\n";
    }

    void testSetUp() override
    {
        Texture2DTest::testSetUp();
        setUpProgram();
    }
};

class Texture2DTestWithDrawScale : public Texture2DTest
{
  protected:
    Texture2DTestWithDrawScale() : Texture2DTest(), mDrawScaleUniformLocation(-1) {}

    const char *getVertexShaderSource() override
    {
        return
            R"(precision highp float;
            attribute vec4 position;
            varying vec2 texcoord;

            uniform vec2 drawScale;

            void main()
            {
                gl_Position = vec4(position.xy * drawScale, 0.0, 1.0);
                texcoord = (position.xy * 0.5) + 0.5;
            })";
    }

    void testSetUp() override
    {
        Texture2DTest::testSetUp();

        setUpProgram();

        mDrawScaleUniformLocation = glGetUniformLocation(mProgram, "drawScale");
        ASSERT_NE(-1, mDrawScaleUniformLocation);

        glUseProgram(mProgram);
        glUniform2f(mDrawScaleUniformLocation, 1.0f, 1.0f);
        glUseProgram(0);
        ASSERT_GL_NO_ERROR();
    }

    GLint mDrawScaleUniformLocation;
};

class Sampler2DAsFunctionParameterTest : public Texture2DTest
{
  protected:
    Sampler2DAsFunctionParameterTest() : Texture2DTest() {}

    const char *getFragmentShaderSource() override
    {
        return
            R"(precision highp float;
            uniform sampler2D tex;
            varying vec2 texcoord;

            vec4 computeFragColor(sampler2D aTex)
            {
                return texture2D(aTex, texcoord);
            }

            void main()
            {
                gl_FragColor = computeFragColor(tex);
            })";
    }

    void testSetUp() override
    {
        Texture2DTest::testSetUp();
        setUpProgram();
    }
};

class TextureCubeTest : public TexCoordDrawTest
{
  protected:
    TextureCubeTest()
        : TexCoordDrawTest(),
          mTexture2D(0),
          mTextureCube(0),
          mTexture2DUniformLocation(-1),
          mTextureCubeUniformLocation(-1)
    {}

    const char *getFragmentShaderSource() override
    {
        return
            R"(precision highp float;
            uniform sampler2D tex2D;
            uniform samplerCube texCube;
            varying vec2 texcoord;

            void main()
            {
                gl_FragColor = texture2D(tex2D, texcoord);
                gl_FragColor += textureCube(texCube, vec3(texcoord, 0));
            })";
    }

    void testSetUp() override
    {
        TexCoordDrawTest::testSetUp();

        glGenTextures(1, &mTextureCube);
        glBindTexture(GL_TEXTURE_CUBE_MAP, mTextureCube);
        for (GLenum face = 0; face < 6; face++)
        {
            glTexImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_X + face, 0, GL_RGBA, 1, 1, 0, GL_RGBA,
                         GL_UNSIGNED_BYTE, nullptr);
        }
        EXPECT_GL_NO_ERROR();

        mTexture2D = create2DTexture();

        setUpProgram();

        mTexture2DUniformLocation = glGetUniformLocation(mProgram, "tex2D");
        ASSERT_NE(-1, mTexture2DUniformLocation);
        mTextureCubeUniformLocation = glGetUniformLocation(mProgram, "texCube");
        ASSERT_NE(-1, mTextureCubeUniformLocation);
    }

    void testTearDown() override
    {
        glDeleteTextures(1, &mTextureCube);
        TexCoordDrawTest::testTearDown();
    }

    GLuint mTexture2D;
    GLuint mTextureCube;
    GLint mTexture2DUniformLocation;
    GLint mTextureCubeUniformLocation;
};

class TextureCubeTestES3 : public ANGLETest
{
  protected:
    TextureCubeTestES3() {}
};

class SamplerArrayTest : public TexCoordDrawTest
{
  protected:
    SamplerArrayTest()
        : TexCoordDrawTest(),
          mTexture2DA(0),
          mTexture2DB(0),
          mTexture0UniformLocation(-1),
          mTexture1UniformLocation(-1)
    {}

    const char *getFragmentShaderSource() override
    {
        return
            R"(precision mediump float;
            uniform highp sampler2D tex2DArray[2];
            varying vec2 texcoord;
            void main()
            {
                gl_FragColor = texture2D(tex2DArray[0], texcoord);
                gl_FragColor += texture2D(tex2DArray[1], texcoord);
            })";
    }

    void testSetUp() override
    {
        TexCoordDrawTest::testSetUp();

        setUpProgram();

        mTexture0UniformLocation = glGetUniformLocation(mProgram, "tex2DArray[0]");
        ASSERT_NE(-1, mTexture0UniformLocation);
        mTexture1UniformLocation = glGetUniformLocation(mProgram, "tex2DArray[1]");
        ASSERT_NE(-1, mTexture1UniformLocation);

        mTexture2DA = create2DTexture();
        mTexture2DB = create2DTexture();
        ASSERT_GL_NO_ERROR();
    }

    void testTearDown() override
    {
        glDeleteTextures(1, &mTexture2DA);
        glDeleteTextures(1, &mTexture2DB);
        TexCoordDrawTest::testTearDown();
    }

    void testSamplerArrayDraw()
    {
        GLubyte texData[4];
        texData[0] = 0;
        texData[1] = 60;
        texData[2] = 0;
        texData[3] = 255;

        glActiveTexture(GL_TEXTURE0);
        glBindTexture(GL_TEXTURE_2D, mTexture2DA);
        glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, 1, 1, GL_RGBA, GL_UNSIGNED_BYTE, texData);

        texData[1] = 120;
        glActiveTexture(GL_TEXTURE1);
        glBindTexture(GL_TEXTURE_2D, mTexture2DB);
        glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, 1, 1, GL_RGBA, GL_UNSIGNED_BYTE, texData);
        EXPECT_GL_ERROR(GL_NO_ERROR);

        glUseProgram(mProgram);
        glUniform1i(mTexture0UniformLocation, 0);
        glUniform1i(mTexture1UniformLocation, 1);
        drawQuad(mProgram, "position", 0.5f);
        EXPECT_GL_NO_ERROR();

        EXPECT_PIXEL_NEAR(0, 0, 0, 180, 0, 255, 2);
    }

    GLuint mTexture2DA;
    GLuint mTexture2DB;
    GLint mTexture0UniformLocation;
    GLint mTexture1UniformLocation;
};

class SamplerArrayAsFunctionParameterTest : public SamplerArrayTest
{
  protected:
    SamplerArrayAsFunctionParameterTest() : SamplerArrayTest() {}

    const char *getFragmentShaderSource() override
    {
        return
            R"(precision mediump float;
            uniform highp sampler2D tex2DArray[2];
            varying vec2 texcoord;

            vec4 computeFragColor(highp sampler2D aTex2DArray[2])
            {
                return texture2D(aTex2DArray[0], texcoord) + texture2D(aTex2DArray[1], texcoord);
            }

            void main()
            {
                gl_FragColor = computeFragColor(tex2DArray);
            })";
    }
};

class Texture2DArrayTestES3 : public TexCoordDrawTest
{
  protected:
    Texture2DArrayTestES3() : TexCoordDrawTest(), m2DArrayTexture(0), mTextureArrayLocation(-1) {}

    const char *getVertexShaderSource() override
    {
        return "#version 300 es\n"
               "out vec2 texcoord;\n"
               "in vec4 position;\n"
               "void main()\n"
               "{\n"
               "    gl_Position = vec4(position.xy, 0.0, 1.0);\n"
               "    texcoord = (position.xy * 0.5) + 0.5;\n"
               "}\n";
    }

    const char *getFragmentShaderSource() override
    {
        return "#version 300 es\n"
               "precision highp float;\n"
               "uniform highp sampler2DArray tex2DArray;\n"
               "in vec2 texcoord;\n"
               "out vec4 fragColor;\n"
               "void main()\n"
               "{\n"
               "    fragColor = texture(tex2DArray, vec3(texcoord.x, texcoord.y, 0.0));\n"
               "}\n";
    }

    void testSetUp() override
    {
        TexCoordDrawTest::testSetUp();

        setUpProgram();

        mTextureArrayLocation = glGetUniformLocation(mProgram, "tex2DArray");
        ASSERT_NE(-1, mTextureArrayLocation);

        glGenTextures(1, &m2DArrayTexture);
        ASSERT_GL_NO_ERROR();
    }

    void testTearDown() override
    {
        glDeleteTextures(1, &m2DArrayTexture);
        TexCoordDrawTest::testTearDown();
    }

    GLuint m2DArrayTexture;
    GLint mTextureArrayLocation;
};

class TextureSizeTextureArrayTest : public TexCoordDrawTest
{
  protected:
    TextureSizeTextureArrayTest()
        : TexCoordDrawTest(),
          mTexture2DA(0),
          mTexture2DB(0),
          mTexture0Location(-1),
          mTexture1Location(-1)
    {}

    const char *getVertexShaderSource() override { return essl3_shaders::vs::Simple(); }

    const char *getFragmentShaderSource() override
    {
        return "#version 300 es\n"
               "precision highp float;\n"
               "uniform highp sampler2D tex2DArray[2];\n"
               "out vec4 fragColor;\n"
               "void main()\n"
               "{\n"
               "    float red = float(textureSize(tex2DArray[0], 0).x) / 255.0;\n"
               "    float green = float(textureSize(tex2DArray[1], 0).x) / 255.0;\n"
               "    fragColor = vec4(red, green, 0.0, 1.0);\n"
               "}\n";
    }

    void testSetUp() override
    {
        TexCoordDrawTest::testSetUp();

        setUpProgram();

        mTexture0Location = glGetUniformLocation(mProgram, "tex2DArray[0]");
        ASSERT_NE(-1, mTexture0Location);
        mTexture1Location = glGetUniformLocation(mProgram, "tex2DArray[1]");
        ASSERT_NE(-1, mTexture1Location);

        mTexture2DA = create2DTexture();
        mTexture2DB = create2DTexture();
        ASSERT_GL_NO_ERROR();
    }

    void testTearDown() override
    {
        glDeleteTextures(1, &mTexture2DA);
        glDeleteTextures(1, &mTexture2DB);
        TexCoordDrawTest::testTearDown();
    }

    GLuint mTexture2DA;
    GLuint mTexture2DB;
    GLint mTexture0Location;
    GLint mTexture1Location;
};

class Texture3DTestES3 : public TexCoordDrawTest
{
  protected:
    Texture3DTestES3() : TexCoordDrawTest(), mTexture3D(0), mTexture3DUniformLocation(-1) {}

    const char *getVertexShaderSource() override
    {
        return "#version 300 es\n"
               "out vec2 texcoord;\n"
               "in vec4 position;\n"
               "void main()\n"
               "{\n"
               "    gl_Position = vec4(position.xy, 0.0, 1.0);\n"
               "    texcoord = (position.xy * 0.5) + 0.5;\n"
               "}\n";
    }

    const char *getFragmentShaderSource() override
    {
        return "#version 300 es\n"
               "precision highp float;\n"
               "uniform highp sampler3D tex3D;\n"
               "in vec2 texcoord;\n"
               "out vec4 fragColor;\n"
               "void main()\n"
               "{\n"
               "    fragColor = texture(tex3D, vec3(texcoord, 0.0));\n"
               "}\n";
    }

    void testSetUp() override
    {
        TexCoordDrawTest::testSetUp();

        glGenTextures(1, &mTexture3D);

        setUpProgram();

        mTexture3DUniformLocation = glGetUniformLocation(mProgram, "tex3D");
        ASSERT_NE(-1, mTexture3DUniformLocation);
    }

    void testTearDown() override
    {
        glDeleteTextures(1, &mTexture3D);
        TexCoordDrawTest::testTearDown();
    }

    GLuint mTexture3D;
    GLint mTexture3DUniformLocation;
};

class ShadowSamplerPlusSampler3DTestES3 : public TexCoordDrawTest
{
  protected:
    ShadowSamplerPlusSampler3DTestES3()
        : TexCoordDrawTest(),
          mTextureShadow(0),
          mTexture3D(0),
          mTextureShadowUniformLocation(-1),
          mTexture3DUniformLocation(-1),
          mDepthRefUniformLocation(-1)
    {}

    const char *getVertexShaderSource() override
    {
        return "#version 300 es\n"
               "out vec2 texcoord;\n"
               "in vec4 position;\n"
               "void main()\n"
               "{\n"
               "    gl_Position = vec4(position.xy, 0.0, 1.0);\n"
               "    texcoord = (position.xy * 0.5) + 0.5;\n"
               "}\n";
    }

    const char *getFragmentShaderSource() override
    {
        return "#version 300 es\n"
               "precision highp float;\n"
               "uniform highp sampler2DShadow tex2DShadow;\n"
               "uniform highp sampler3D tex3D;\n"
               "in vec2 texcoord;\n"
               "uniform float depthRef;\n"
               "out vec4 fragColor;\n"
               "void main()\n"
               "{\n"
               "    fragColor = vec4(texture(tex2DShadow, vec3(texcoord, depthRef)) * 0.5);\n"
               "    fragColor += texture(tex3D, vec3(texcoord, 0.0));\n"
               "}\n";
    }

    void testSetUp() override
    {
        TexCoordDrawTest::testSetUp();

        glGenTextures(1, &mTexture3D);

        glGenTextures(1, &mTextureShadow);
        glBindTexture(GL_TEXTURE_2D, mTextureShadow);
        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_COMPARE_MODE, GL_COMPARE_REF_TO_TEXTURE);

        setUpProgram();

        mTextureShadowUniformLocation = glGetUniformLocation(mProgram, "tex2DShadow");
        ASSERT_NE(-1, mTextureShadowUniformLocation);
        mTexture3DUniformLocation = glGetUniformLocation(mProgram, "tex3D");
        ASSERT_NE(-1, mTexture3DUniformLocation);
        mDepthRefUniformLocation = glGetUniformLocation(mProgram, "depthRef");
        ASSERT_NE(-1, mDepthRefUniformLocation);
    }

    void testTearDown() override
    {
        glDeleteTextures(1, &mTextureShadow);
        glDeleteTextures(1, &mTexture3D);
        TexCoordDrawTest::testTearDown();
    }

    GLuint mTextureShadow;
    GLuint mTexture3D;
    GLint mTextureShadowUniformLocation;
    GLint mTexture3DUniformLocation;
    GLint mDepthRefUniformLocation;
};

class SamplerTypeMixTestES3 : public TexCoordDrawTest
{
  protected:
    SamplerTypeMixTestES3()
        : TexCoordDrawTest(),
          mTexture2D(0),
          mTextureCube(0),
          mTexture2DShadow(0),
          mTextureCubeShadow(0),
          mTexture2DUniformLocation(-1),
          mTextureCubeUniformLocation(-1),
          mTexture2DShadowUniformLocation(-1),
          mTextureCubeShadowUniformLocation(-1),
          mDepthRefUniformLocation(-1)
    {}

    const char *getVertexShaderSource() override
    {
        return "#version 300 es\n"
               "out vec2 texcoord;\n"
               "in vec4 position;\n"
               "void main()\n"
               "{\n"
               "    gl_Position = vec4(position.xy, 0.0, 1.0);\n"
               "    texcoord = (position.xy * 0.5) + 0.5;\n"
               "}\n";
    }

    const char *getFragmentShaderSource() override
    {
        return "#version 300 es\n"
               "precision highp float;\n"
               "uniform highp sampler2D tex2D;\n"
               "uniform highp samplerCube texCube;\n"
               "uniform highp sampler2DShadow tex2DShadow;\n"
               "uniform highp samplerCubeShadow texCubeShadow;\n"
               "in vec2 texcoord;\n"
               "uniform float depthRef;\n"
               "out vec4 fragColor;\n"
               "void main()\n"
               "{\n"
               "    fragColor = texture(tex2D, texcoord);\n"
               "    fragColor += texture(texCube, vec3(1.0, 0.0, 0.0));\n"
               "    fragColor += vec4(texture(tex2DShadow, vec3(texcoord, depthRef)) * 0.25);\n"
               "    fragColor += vec4(texture(texCubeShadow, vec4(1.0, 0.0, 0.0, depthRef)) * "
               "0.125);\n"
               "}\n";
    }

    void testSetUp() override
    {
        TexCoordDrawTest::testSetUp();

        glGenTextures(1, &mTexture2D);
        glGenTextures(1, &mTextureCube);

        glGenTextures(1, &mTexture2DShadow);
        glBindTexture(GL_TEXTURE_2D, mTexture2DShadow);
        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_COMPARE_MODE, GL_COMPARE_REF_TO_TEXTURE);

        glGenTextures(1, &mTextureCubeShadow);
        glBindTexture(GL_TEXTURE_CUBE_MAP, mTextureCubeShadow);
        glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_COMPARE_MODE, GL_COMPARE_REF_TO_TEXTURE);

        setUpProgram();

        mTexture2DUniformLocation = glGetUniformLocation(mProgram, "tex2D");
        ASSERT_NE(-1, mTexture2DUniformLocation);
        mTextureCubeUniformLocation = glGetUniformLocation(mProgram, "texCube");
        ASSERT_NE(-1, mTextureCubeUniformLocation);
        mTexture2DShadowUniformLocation = glGetUniformLocation(mProgram, "tex2DShadow");
        ASSERT_NE(-1, mTexture2DShadowUniformLocation);
        mTextureCubeShadowUniformLocation = glGetUniformLocation(mProgram, "texCubeShadow");
        ASSERT_NE(-1, mTextureCubeShadowUniformLocation);
        mDepthRefUniformLocation = glGetUniformLocation(mProgram, "depthRef");
        ASSERT_NE(-1, mDepthRefUniformLocation);

        ASSERT_GL_NO_ERROR();
    }

    void testTearDown() override
    {
        glDeleteTextures(1, &mTexture2D);
        glDeleteTextures(1, &mTextureCube);
        glDeleteTextures(1, &mTexture2DShadow);
        glDeleteTextures(1, &mTextureCubeShadow);
        TexCoordDrawTest::testTearDown();
    }

    GLuint mTexture2D;
    GLuint mTextureCube;
    GLuint mTexture2DShadow;
    GLuint mTextureCubeShadow;
    GLint mTexture2DUniformLocation;
    GLint mTextureCubeUniformLocation;
    GLint mTexture2DShadowUniformLocation;
    GLint mTextureCubeShadowUniformLocation;
    GLint mDepthRefUniformLocation;
};

class SamplerInStructTest : public Texture2DTest
{
  protected:
    SamplerInStructTest() : Texture2DTest() {}

    const char *getTextureUniformName() override { return "us.tex"; }

    const char *getFragmentShaderSource() override
    {
        return "precision highp float;\n"
               "struct S\n"
               "{\n"
               "    vec4 a;\n"
               "    highp sampler2D tex;\n"
               "};\n"
               "uniform S us;\n"
               "varying vec2 texcoord;\n"
               "void main()\n"
               "{\n"
               "    gl_FragColor = texture2D(us.tex, texcoord + us.a.x);\n"
               "}\n";
    }

    void runSamplerInStructTest()
    {
        setUpProgram();

        glActiveTexture(GL_TEXTURE0);
        glBindTexture(GL_TEXTURE_2D, mTexture2D);
        glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 1, 1, 0, GL_RGBA, GL_UNSIGNED_BYTE,
                     &GLColor::green);
        drawQuad(mProgram, "position", 0.5f);
        EXPECT_PIXEL_COLOR_EQ(0, 0, GLColor::green);
    }
};

class SamplerInStructAsFunctionParameterTest : public SamplerInStructTest
{
  protected:
    SamplerInStructAsFunctionParameterTest() : SamplerInStructTest() {}

    const char *getFragmentShaderSource() override
    {
        return "precision highp float;\n"
               "struct S\n"
               "{\n"
               "    vec4 a;\n"
               "    highp sampler2D tex;\n"
               "};\n"
               "uniform S us;\n"
               "varying vec2 texcoord;\n"
               "vec4 sampleFrom(S s) {\n"
               "    return texture2D(s.tex, texcoord + s.a.x);\n"
               "}\n"
               "void main()\n"
               "{\n"
               "    gl_FragColor = sampleFrom(us);\n"
               "}\n";
    }
};

class SamplerInStructArrayAsFunctionParameterTest : public SamplerInStructTest
{
  protected:
    SamplerInStructArrayAsFunctionParameterTest() : SamplerInStructTest() {}

    const char *getTextureUniformName() override { return "us[0].tex"; }

    const char *getFragmentShaderSource() override
    {
        return "precision highp float;\n"
               "struct S\n"
               "{\n"
               "    vec4 a;\n"
               "    highp sampler2D tex;\n"
               "};\n"
               "uniform S us[1];\n"
               "varying vec2 texcoord;\n"
               "vec4 sampleFrom(S s) {\n"
               "    return texture2D(s.tex, texcoord + s.a.x);\n"
               "}\n"
               "void main()\n"
               "{\n"
               "    gl_FragColor = sampleFrom(us[0]);\n"
               "}\n";
    }
};

class SamplerInNestedStructAsFunctionParameterTest : public SamplerInStructTest
{
  protected:
    SamplerInNestedStructAsFunctionParameterTest() : SamplerInStructTest() {}

    const char *getTextureUniformName() override { return "us[0].sub.tex"; }

    const char *getFragmentShaderSource() override
    {
        return "precision highp float;\n"
               "struct SUB\n"
               "{\n"
               "    vec4 a;\n"
               "    highp sampler2D tex;\n"
               "};\n"
               "struct S\n"
               "{\n"
               "    SUB sub;\n"
               "};\n"
               "uniform S us[1];\n"
               "varying vec2 texcoord;\n"
               "vec4 sampleFrom(SUB s) {\n"
               "    return texture2D(s.tex, texcoord + s.a.x);\n"
               "}\n"
               "void main()\n"
               "{\n"
               "    gl_FragColor = sampleFrom(us[0].sub);\n"
               "}\n";
    }
};

class SamplerInStructAndOtherVariableTest : public SamplerInStructTest
{
  protected:
    SamplerInStructAndOtherVariableTest() : SamplerInStructTest() {}

    const char *getFragmentShaderSource() override
    {
        return "precision highp float;\n"
               "struct S\n"
               "{\n"
               "    vec4 a;\n"
               "    highp sampler2D tex;\n"
               "};\n"
               "uniform S us;\n"
               "uniform float us_tex;\n"
               "varying vec2 texcoord;\n"
               "void main()\n"
               "{\n"
               "    gl_FragColor = texture2D(us.tex, texcoord + us.a.x + us_tex);\n"
               "}\n";
    }
};

class Texture2DIntegerTestES3 : public Texture2DTest
{
  protected:
    Texture2DIntegerTestES3() : Texture2DTest() {}

    const char *getVertexShaderSource() override
    {
        return "#version 300 es\n"
               "out vec2 texcoord;\n"
               "in vec4 position;\n"
               "void main()\n"
               "{\n"
               "    gl_Position = vec4(position.xy, 0.0, 1.0);\n"
               "    texcoord = (position.xy * 0.5) + 0.5;\n"
               "}\n";
    }

    const char *getFragmentShaderSource() override
    {
        return "#version 300 es\n"
               "precision highp float;\n"
               "precision highp usampler2D;\n"
               "uniform usampler2D tex;\n"
               "in vec2 texcoord;\n"
               "out vec4 fragColor;\n"
               "void main()\n"
               "{\n"
               "    fragColor = vec4(texture(tex, texcoord))/255.0;\n"
               "}\n";
    }
};

class TextureCubeIntegerTestES3 : public TexCoordDrawTest
{
  protected:
    TextureCubeIntegerTestES3()
        : TexCoordDrawTest(), mTextureCube(0), mTextureCubeUniformLocation(-1)
    {}

    const char *getVertexShaderSource() override
    {
        return "#version 300 es\n"
               "out vec2 texcoord;\n"
               "in vec4 position;\n"
               "void main()\n"
               "{\n"
               "    gl_Position = vec4(position.xy, 0.0, 1.0);\n"
               "    texcoord = 0.5*position.xy;\n"
               "}\n";
    }

    const char *getFragmentShaderSource() override
    {
        return "#version 300 es\n"
               "precision highp float;\n"
               "precision highp usamplerCube;\n"
               "uniform usamplerCube texCube;\n"
               "in vec2 texcoord;\n"
               "out vec4 fragColor;\n"
               "void main()\n"
               "{\n"
               "    fragColor = vec4(texture(texCube, vec3(texcoord, 1)))/255.0;\n"
               "}\n";
    }

    void testSetUp() override
    {
        TexCoordDrawTest::testSetUp();
        glGenTextures(1, &mTextureCube);
        setUpProgram();

        mTextureCubeUniformLocation = glGetUniformLocation(mProgram, "texCube");
        ASSERT_NE(-1, mTextureCubeUniformLocation);
    }

    void testTearDown() override
    {
        glDeleteTextures(1, &mTextureCube);
        TexCoordDrawTest::testTearDown();
    }

    GLuint mTextureCube;
    GLint mTextureCubeUniformLocation;
};

class TextureCubeIntegerEdgeTestES3 : public TextureCubeIntegerTestES3
{
  protected:
    TextureCubeIntegerEdgeTestES3() : TextureCubeIntegerTestES3() {}

    const char *getVertexShaderSource() override
    {
        return "#version 300 es\n"
               "out vec2 texcoord;\n"
               "in vec4 position;\n"
               "void main()\n"
               "{\n"
               "    gl_Position = vec4(position.xy, 0.0, 1.0);\n"
               "    texcoord = position.xy;\n"
               "}\n";
    }

    const char *getFragmentShaderSource() override
    {
        return "#version 300 es\n"
               "precision highp float;\n"
               "precision highp usamplerCube;\n"
               "uniform usamplerCube texCube;\n"
               "in vec2 texcoord;\n"
               "out vec4 fragColor;\n"
               "void main()\n"
               "{\n"
               "    fragColor = vec4(texture(texCube, vec3(texcoord, 0)))/255.0;\n"
               "}\n";
    }
};

class Texture2DIntegerProjectiveOffsetTestES3 : public Texture2DTest
{
  protected:
    Texture2DIntegerProjectiveOffsetTestES3() : Texture2DTest() {}

    const char *getVertexShaderSource() override
    {
        return "#version 300 es\n"
               "out vec2 texcoord;\n"
               "in vec4 position;\n"
               "void main()\n"
               "{\n"
               "    gl_Position = vec4(position.xy, 0.0, 1.0);\n"
               "    texcoord = 0.5*position.xy + vec2(0.5, 0.5);\n"
               "}\n";
    }

    const char *getFragmentShaderSource() override
    {
        return "#version 300 es\n"
               "precision highp float;\n"
               "precision highp usampler2D;\n"
               "uniform usampler2D tex;\n"
               "in vec2 texcoord;\n"
               "out vec4 fragColor;\n"
               "void main()\n"
               "{\n"
               "    fragColor = vec4(textureProjOffset(tex, vec3(texcoord, 1), ivec2(0,0), "
               "0.0))/255.0;\n"
               "}\n";
    }
};

class Texture2DArrayIntegerTestES3 : public Texture2DArrayTestES3
{
  protected:
    Texture2DArrayIntegerTestES3() : Texture2DArrayTestES3() {}

    const char *getVertexShaderSource() override
    {
        return "#version 300 es\n"
               "out vec2 texcoord;\n"
               "in vec4 position;\n"
               "void main()\n"
               "{\n"
               "    gl_Position = vec4(position.xy, 0.0, 1.0);\n"
               "    texcoord = (position.xy * 0.5) + 0.5;\n"
               "}\n";
    }

    const char *getFragmentShaderSource() override
    {
        return "#version 300 es\n"
               "precision highp float;\n"
               "uniform highp usampler2DArray tex2DArray;\n"
               "in vec2 texcoord;\n"
               "out vec4 fragColor;\n"
               "void main()\n"
               "{\n"
               "    fragColor = vec4(texture(tex2DArray, vec3(texcoord.x, texcoord.y, "
               "0.0)))/255.0;\n"
               "}\n";
    }
};

class Texture3DIntegerTestES3 : public Texture3DTestES3
{
  protected:
    Texture3DIntegerTestES3() : Texture3DTestES3() {}

    const char *getVertexShaderSource() override
    {
        return "#version 300 es\n"
               "out vec2 texcoord;\n"
               "in vec4 position;\n"
               "void main()\n"
               "{\n"
               "    gl_Position = vec4(position.xy, 0.0, 1.0);\n"
               "    texcoord = (position.xy * 0.5) + 0.5;\n"
               "}\n";
    }

    const char *getFragmentShaderSource() override
    {
        return "#version 300 es\n"
               "precision highp float;\n"
               "uniform highp usampler3D tex3D;\n"
               "in vec2 texcoord;\n"
               "out vec4 fragColor;\n"
               "void main()\n"
               "{\n"
               "    fragColor = vec4(texture(tex3D, vec3(texcoord, 0.0)))/255.0;\n"
               "}\n";
    }
};

TEST_P(Texture2DTest, NegativeAPISubImage)
{
    glBindTexture(GL_TEXTURE_2D, mTexture2D);
    EXPECT_GL_ERROR(GL_NO_ERROR);

    setUpProgram();

    const GLubyte *pixels[20] = {0};
    glTexSubImage2D(GL_TEXTURE_2D, 0, 1, 1, 1, 1, GL_RGBA, GL_UNSIGNED_BYTE, pixels);
    EXPECT_GL_ERROR(GL_INVALID_VALUE);

    if (IsGLExtensionEnabled("GL_EXT_texture_storage"))
    {
        // Create a 1-level immutable texture.
        glTexStorage2DEXT(GL_TEXTURE_2D, 1, GL_RGBA8, 2, 2);

        // Try calling sub image on the second level.
        glTexSubImage2D(GL_TEXTURE_2D, 1, 1, 1, 1, 1, GL_RGBA, GL_UNSIGNED_BYTE, pixels);
        EXPECT_GL_ERROR(GL_INVALID_OPERATION);
    }
}

// Test that querying GL_TEXTURE_BINDING* doesn't cause an unexpected error.
TEST_P(Texture2DTest, QueryBinding)
{
    glBindTexture(GL_TEXTURE_2D, 0);
    EXPECT_GL_ERROR(GL_NO_ERROR);

    GLint textureBinding;
    glGetIntegerv(GL_TEXTURE_BINDING_2D, &textureBinding);
    EXPECT_GL_NO_ERROR();
    EXPECT_EQ(0, textureBinding);

    glGetIntegerv(GL_TEXTURE_BINDING_EXTERNAL_OES, &textureBinding);
    if (IsGLExtensionEnabled("GL_OES_EGL_image_external") ||
        IsGLExtensionEnabled("GL_NV_EGL_stream_consumer_external"))
    {
        EXPECT_GL_NO_ERROR();
        EXPECT_EQ(0, textureBinding);
    }
    else
    {
        EXPECT_GL_ERROR(GL_INVALID_ENUM);
    }
}

TEST_P(Texture2DTest, ZeroSizedUploads)
{
    glBindTexture(GL_TEXTURE_2D, mTexture2D);
    EXPECT_GL_ERROR(GL_NO_ERROR);

    setUpProgram();

    // Use the texture first to make sure it's in video memory
    glUseProgram(mProgram);
    glUniform1i(mTexture2DUniformLocation, 0);
    drawQuad(mProgram, "position", 0.5f);

    const GLubyte *pixel[4] = {0};

    glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, 0, 0, GL_RGBA, GL_UNSIGNED_BYTE, pixel);
    EXPECT_GL_NO_ERROR();

    glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, 0, 1, GL_RGBA, GL_UNSIGNED_BYTE, pixel);
    EXPECT_GL_NO_ERROR();

    glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, 1, 0, GL_RGBA, GL_UNSIGNED_BYTE, pixel);
    EXPECT_GL_NO_ERROR();
}

// Test drawing with two texture types, to trigger an ANGLE bug in validation
TEST_P(TextureCubeTest, CubeMapBug)
{
    glActiveTexture(GL_TEXTURE0);
    glBindTexture(GL_TEXTURE_2D, mTexture2D);
    glActiveTexture(GL_TEXTURE1);
    glBindTexture(GL_TEXTURE_CUBE_MAP, mTextureCube);
    EXPECT_GL_ERROR(GL_NO_ERROR);

    glUseProgram(mProgram);
    glUniform1i(mTexture2DUniformLocation, 0);
    glUniform1i(mTextureCubeUniformLocation, 1);
    drawQuad(mProgram, "position", 0.5f);
    EXPECT_GL_NO_ERROR();
}

// Test drawing with two texture types accessed from the same shader and check that the result of
// drawing is correct.
TEST_P(TextureCubeTest, CubeMapDraw)
{
    GLubyte texData[4];
    texData[0] = 0;
    texData[1] = 60;
    texData[2] = 0;
    texData[3] = 255;

    glActiveTexture(GL_TEXTURE0);
    glBindTexture(GL_TEXTURE_2D, mTexture2D);
    glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, 1, 1, GL_RGBA, GL_UNSIGNED_BYTE, texData);

    glActiveTexture(GL_TEXTURE1);
    glBindTexture(GL_TEXTURE_CUBE_MAP, mTextureCube);
    texData[1] = 120;
    glTexSubImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_X, 0, 0, 0, 1, 1, GL_RGBA, GL_UNSIGNED_BYTE,
                    texData);
    EXPECT_GL_ERROR(GL_NO_ERROR);

    glUseProgram(mProgram);
    glUniform1i(mTexture2DUniformLocation, 0);
    glUniform1i(mTextureCubeUniformLocation, 1);
    drawQuad(mProgram, "position", 0.5f);
    EXPECT_GL_NO_ERROR();

    int px = getWindowWidth() - 1;
    int py = 0;
    EXPECT_PIXEL_NEAR(px, py, 0, 180, 0, 255, 2);
}

TEST_P(Sampler2DAsFunctionParameterTest, Sampler2DAsFunctionParameter)
{
    glActiveTexture(GL_TEXTURE0);
    glBindTexture(GL_TEXTURE_2D, mTexture2D);
    GLubyte texData[4];
    texData[0] = 0;
    texData[1] = 128;
    texData[2] = 0;
    texData[3] = 255;
    glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, 1, 1, GL_RGBA, GL_UNSIGNED_BYTE, texData);
    glUseProgram(mProgram);
    glUniform1i(mTexture2DUniformLocation, 0);
    drawQuad(mProgram, "position", 0.5f);
    EXPECT_GL_NO_ERROR();

    EXPECT_PIXEL_NEAR(0, 0, 0, 128, 0, 255, 2);
}

// Test drawing with two textures passed to the shader in a sampler array.
TEST_P(SamplerArrayTest, SamplerArrayDraw)
{
    testSamplerArrayDraw();
}

// Test drawing with two textures passed to the shader in a sampler array which is passed to a
// user-defined function in the shader.
TEST_P(SamplerArrayAsFunctionParameterTest, SamplerArrayAsFunctionParameter)
{
    // TODO: Diagnose and fix. http://anglebug.com/2955
    ANGLE_SKIP_TEST_IF(IsVulkan() && IsAndroid());

    testSamplerArrayDraw();
}

// Copy of a test in conformance/textures/texture-mips, to test generate mipmaps
TEST_P(Texture2DTestWithDrawScale, MipmapsTwice)
{
    int px = getWindowWidth() / 2;
    int py = getWindowHeight() / 2;

    glActiveTexture(GL_TEXTURE0);
    glBindTexture(GL_TEXTURE_2D, mTexture2D);

    std::vector<GLColor> pixelsRed(16u * 16u, GLColor::red);

    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 16, 16, 0, GL_RGBA, GL_UNSIGNED_BYTE, pixelsRed.data());
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_NEAREST);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
    glGenerateMipmap(GL_TEXTURE_2D);

    glUseProgram(mProgram);
    glUniform1i(mTexture2DUniformLocation, 0);
    glUniform2f(mDrawScaleUniformLocation, 0.0625f, 0.0625f);
    drawQuad(mProgram, "position", 0.5f);
    EXPECT_GL_NO_ERROR();
    EXPECT_PIXEL_COLOR_EQ(px, py, GLColor::red);

    std::vector<GLColor> pixelsBlue(16u * 16u, GLColor::blue);

    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 16, 16, 0, GL_RGBA, GL_UNSIGNED_BYTE,
                 pixelsBlue.data());
    glGenerateMipmap(GL_TEXTURE_2D);

    std::vector<GLColor> pixelsGreen(16u * 16u, GLColor::green);

    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 16, 16, 0, GL_RGBA, GL_UNSIGNED_BYTE,
                 pixelsGreen.data());
    glGenerateMipmap(GL_TEXTURE_2D);

    drawQuad(mProgram, "position", 0.5f);

    EXPECT_GL_NO_ERROR();
    EXPECT_PIXEL_COLOR_EQ(px, py, GLColor::green);
}

// Test creating a FBO with a cube map render target, to test an ANGLE bug
// https://code.google.com/p/angleproject/issues/detail?id=849
TEST_P(TextureCubeTest, CubeMapFBO)
{
    // http://anglebug.com/3145
    ANGLE_SKIP_TEST_IF(IsFuchsia() && IsIntel() && IsVulkan());

    // http://anglebug.com/2822
    ANGLE_SKIP_TEST_IF(IsWindows() && IsIntel() && IsVulkan());

    GLFramebuffer fbo;
    glBindFramebuffer(GL_FRAMEBUFFER, fbo);

    glBindTexture(GL_TEXTURE_CUBE_MAP, mTextureCube);
    glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_CUBE_MAP_POSITIVE_Y,
                           mTextureCube, 0);

    EXPECT_GLENUM_EQ(GL_FRAMEBUFFER_COMPLETE, glCheckFramebufferStatus(GL_FRAMEBUFFER));
    EXPECT_GL_NO_ERROR();

    // Test clearing the six mip faces individually.
    std::array<GLColor, 6> faceColors = {{GLColor::red, GLColor::green, GLColor::blue,
                                          GLColor::yellow, GLColor::cyan, GLColor::magenta}};

    for (size_t faceIndex = 0; faceIndex < 6; ++faceIndex)
    {
        glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0,
                               GL_TEXTURE_CUBE_MAP_POSITIVE_X + faceIndex, mTextureCube, 0);

        Vector4 clearColorF = faceColors[faceIndex].toNormalizedVector();
        glClearColor(clearColorF.x(), clearColorF.y(), clearColorF.z(), clearColorF.w());
        glClear(GL_COLOR_BUFFER_BIT);

        EXPECT_PIXEL_COLOR_EQ(0, 0, faceColors[faceIndex]);
    }

    // Iterate the faces again to make sure the colors haven't changed.
    for (size_t faceIndex = 0; faceIndex < 6; ++faceIndex)
    {
        glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0,
                               GL_TEXTURE_CUBE_MAP_POSITIVE_X + faceIndex, mTextureCube, 0);
        EXPECT_PIXEL_COLOR_EQ(0, 0, faceColors[faceIndex])
            << "face color " << faceIndex << " shouldn't change";
    }
}

// Tests clearing a cube map with a scissor enabled.
TEST_P(TextureCubeTest, CubeMapFBOScissoredClear)
{
    // TODO(jie.a.chen): Diagnose and fix. http://anglebug.com/2822
    ANGLE_SKIP_TEST_IF(IsVulkan() && IsIntel() && IsWindows());

    // http://anglebug.com/3145
    ANGLE_SKIP_TEST_IF(IsFuchsia() && IsIntel() && IsVulkan());

    constexpr size_t kSize = 16;

    GLFramebuffer fbo;
    glBindFramebuffer(GL_FRAMEBUFFER, fbo);
    glViewport(0, 0, kSize, kSize);

    GLTexture texcube;
    glBindTexture(GL_TEXTURE_CUBE_MAP, texcube);
    for (GLenum face = 0; face < 6; face++)
    {
        glTexImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_X + face, 0, GL_RGBA, kSize, kSize, 0, GL_RGBA,
                     GL_UNSIGNED_BYTE, nullptr);
    }
    ASSERT_GL_NO_ERROR();

    glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_CUBE_MAP_POSITIVE_Y,
                           texcube, 0);

    EXPECT_GLENUM_EQ(GL_FRAMEBUFFER_COMPLETE, glCheckFramebufferStatus(GL_FRAMEBUFFER));
    ASSERT_GL_NO_ERROR();

    glClearColor(1.0f, 0.0f, 0.0f, 1.0f);
    glClear(GL_COLOR_BUFFER_BIT);
    EXPECT_PIXEL_COLOR_EQ(0, 0, GLColor::red);

    glEnable(GL_SCISSOR_TEST);
    glScissor(kSize / 2, 0, kSize / 2, kSize);
    glClearColor(0.0f, 1.0f, 0.0f, 1.0f);
    glClear(GL_COLOR_BUFFER_BIT);

    EXPECT_PIXEL_COLOR_EQ(0, 0, GLColor::red);
    EXPECT_PIXEL_COLOR_EQ(kSize / 2 + 1, 0, GLColor::green);

    ASSERT_GL_NO_ERROR();
}

// Test that glTexSubImage2D works properly when glTexStorage2DEXT has initialized the image with a
// default color.
TEST_P(Texture2DTest, TexStorage)
{
    ANGLE_SKIP_TEST_IF(getClientMajorVersion() < 3 &&
                       !IsGLExtensionEnabled("GL_EXT_texture_storage"));

    int width  = getWindowWidth();
    int height = getWindowHeight();

    GLuint tex2D;
    glGenTextures(1, &tex2D);
    glActiveTexture(GL_TEXTURE0);
    glBindTexture(GL_TEXTURE_2D, tex2D);

    // Fill with red
    std::vector<GLubyte> pixels(3 * 16 * 16);
    for (size_t pixelId = 0; pixelId < 16 * 16; ++pixelId)
    {
        pixels[pixelId * 3 + 0] = 255;
        pixels[pixelId * 3 + 1] = 0;
        pixels[pixelId * 3 + 2] = 0;
    }

    // ANGLE internally uses RGBA as the DirectX format for RGB images
    // therefore glTexStorage2DEXT initializes the image to a default color to get a consistent
    // alpha color. The data is kept in a CPU-side image and the image is marked as dirty.
    if (getClientMajorVersion() >= 3)
    {
        glTexStorage2D(GL_TEXTURE_2D, 1, GL_RGB8, 16, 16);
    }
    else
    {
        glTexStorage2DEXT(GL_TEXTURE_2D, 1, GL_RGB8, 16, 16);
    }

    // Initializes the color of the upper-left 8x8 pixels, leaves the other pixels untouched.
    // glTexSubImage2D should take into account that the image is dirty.
    glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, 8, 8, GL_RGB, GL_UNSIGNED_BYTE, pixels.data());
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);

    setUpProgram();

    glUseProgram(mProgram);
    glUniform1i(mTexture2DUniformLocation, 0);
    drawQuad(mProgram, "position", 0.5f);
    glDeleteTextures(1, &tex2D);
    EXPECT_GL_NO_ERROR();
    EXPECT_PIXEL_EQ(width / 4, height / 4, 255, 0, 0, 255);

    // Validate that the region of the texture without data has an alpha of 1.0
    angle::GLColor pixel = ReadColor(3 * width / 4, 3 * height / 4);
    EXPECT_EQ(255, pixel.A);
}

// Test that glTexSubImage2D combined with a PBO works properly when glTexStorage2DEXT has
// initialized the image with a default color.
TEST_P(Texture2DTest, TexStorageWithPBO)
{
    if (IsGLExtensionEnabled("NV_pixel_buffer_object"))
    {
        int width  = getWindowWidth();
        int height = getWindowHeight();

        GLuint tex2D;
        glGenTextures(1, &tex2D);
        glActiveTexture(GL_TEXTURE0);
        glBindTexture(GL_TEXTURE_2D, tex2D);

        // Fill with red
        std::vector<GLubyte> pixels(3 * 16 * 16);
        for (size_t pixelId = 0; pixelId < 16 * 16; ++pixelId)
        {
            pixels[pixelId * 3 + 0] = 255;
            pixels[pixelId * 3 + 1] = 0;
            pixels[pixelId * 3 + 2] = 0;
        }

        // Read 16x16 region from red backbuffer to PBO
        GLuint pbo;
        glGenBuffers(1, &pbo);
        glBindBuffer(GL_PIXEL_UNPACK_BUFFER, pbo);
        glBufferData(GL_PIXEL_UNPACK_BUFFER, 3 * 16 * 16, pixels.data(), GL_STATIC_DRAW);

        // ANGLE internally uses RGBA as the DirectX format for RGB images
        // therefore glTexStorage2DEXT initializes the image to a default color to get a consistent
        // alpha color. The data is kept in a CPU-side image and the image is marked as dirty.
        glTexStorage2DEXT(GL_TEXTURE_2D, 1, GL_RGB8, 16, 16);

        // Initializes the color of the upper-left 8x8 pixels, leaves the other pixels untouched.
        // glTexSubImage2D should take into account that the image is dirty.
        glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, 8, 8, GL_RGB, GL_UNSIGNED_BYTE, nullptr);
        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);

        setUpProgram();

        glUseProgram(mProgram);
        glUniform1i(mTexture2DUniformLocation, 0);
        drawQuad(mProgram, "position", 0.5f);
        glDeleteTextures(1, &tex2D);
        glDeleteBuffers(1, &pbo);
        EXPECT_GL_NO_ERROR();
        EXPECT_PIXEL_EQ(3 * width / 4, 3 * height / 4, 0, 0, 0, 255);
        EXPECT_PIXEL_EQ(width / 4, height / 4, 255, 0, 0, 255);
    }
}

// Tests CopySubImage for float formats
TEST_P(Texture2DTest, CopySubImageFloat_R_R)
{
    testFloatCopySubImage(1, 1);
}

TEST_P(Texture2DTest, CopySubImageFloat_RG_R)
{
    testFloatCopySubImage(2, 1);
}

TEST_P(Texture2DTest, CopySubImageFloat_RG_RG)
{
    testFloatCopySubImage(2, 2);
}

TEST_P(Texture2DTest, CopySubImageFloat_RGB_R)
{
    testFloatCopySubImage(3, 1);
}

TEST_P(Texture2DTest, CopySubImageFloat_RGB_RG)
{
    testFloatCopySubImage(3, 2);
}

TEST_P(Texture2DTest, CopySubImageFloat_RGB_RGB)
{
    // TODO(cwallez): Fix on Linux Intel drivers (http://anglebug.com/1346)
    ANGLE_SKIP_TEST_IF(IsIntel() && IsLinux() && IsOpenGL());

    // Ignore SDK layers messages on D3D11 FL 9.3 (http://anglebug.com/1284)
    ANGLE_SKIP_TEST_IF(IsD3D11_FL93());

    testFloatCopySubImage(3, 3);
}

TEST_P(Texture2DTest, CopySubImageFloat_RGBA_R)
{
    testFloatCopySubImage(4, 1);
}

TEST_P(Texture2DTest, CopySubImageFloat_RGBA_RG)
{
    testFloatCopySubImage(4, 2);
}

TEST_P(Texture2DTest, CopySubImageFloat_RGBA_RGB)
{
    // Ignore SDK layers messages on D3D11 FL 9.3 (http://anglebug.com/1284)
    ANGLE_SKIP_TEST_IF(IsD3D11_FL93());

    testFloatCopySubImage(4, 3);
}

TEST_P(Texture2DTest, CopySubImageFloat_RGBA_RGBA)
{
    // Ignore SDK layers messages on D3D11 FL 9.3 (http://anglebug.com/1284)
    ANGLE_SKIP_TEST_IF(IsD3D11_FL93());

    testFloatCopySubImage(4, 4);
}

// Port of
// https://www.khronos.org/registry/webgl/conformance-suites/1.0.3/conformance/textures/texture-npot.html
// Run against GL_ALPHA/UNSIGNED_BYTE format, to ensure that D3D11 Feature Level 9_3 correctly
// handles GL_ALPHA
TEST_P(Texture2DTest, TextureNPOT_GL_ALPHA_UBYTE)
{
    const int npotTexSize = 5;
    const int potTexSize  = 4;  // Should be less than npotTexSize
    GLuint tex2D;

    if (IsGLExtensionEnabled("GL_OES_texture_npot"))
    {
        // This test isn't applicable if texture_npot is enabled
        return;
    }

    setUpProgram();

    glClearColor(0.0f, 0.0f, 0.0f, 0.0f);

    // Default unpack alignment is 4. The values of 'pixels' below needs it to be 1.
    glPixelStorei(GL_UNPACK_ALIGNMENT, 1);

    glActiveTexture(GL_TEXTURE0);
    glGenTextures(1, &tex2D);
    glBindTexture(GL_TEXTURE_2D, tex2D);

    const std::vector<GLubyte> pixels(1 * npotTexSize * npotTexSize, 64);

    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);

    // Check that an NPOT texture not on level 0 generates INVALID_VALUE
    glTexImage2D(GL_TEXTURE_2D, 1, GL_ALPHA, npotTexSize, npotTexSize, 0, GL_ALPHA,
                 GL_UNSIGNED_BYTE, pixels.data());
    EXPECT_GL_ERROR(GL_INVALID_VALUE);

    // Check that an NPOT texture on level 0 succeeds
    glTexImage2D(GL_TEXTURE_2D, 0, GL_ALPHA, npotTexSize, npotTexSize, 0, GL_ALPHA,
                 GL_UNSIGNED_BYTE, pixels.data());
    EXPECT_GL_NO_ERROR();

    // Check that generateMipmap fails on NPOT
    glGenerateMipmap(GL_TEXTURE_2D);
    EXPECT_GL_ERROR(GL_INVALID_OPERATION);

    // Check that nothing is drawn if filtering is not correct for NPOT
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
    glClear(GL_COLOR_BUFFER_BIT);
    drawQuad(mProgram, "position", 1.0f);
    EXPECT_PIXEL_EQ(getWindowWidth() / 2, getWindowHeight() / 2, 0, 0, 0, 255);

    // NPOT texture with TEXTURE_MIN_FILTER not NEAREST or LINEAR should draw with 0,0,0,255
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST_MIPMAP_LINEAR);
    glClear(GL_COLOR_BUFFER_BIT);
    drawQuad(mProgram, "position", 1.0f);
    EXPECT_PIXEL_EQ(getWindowWidth() / 2, getWindowHeight() / 2, 0, 0, 0, 255);

    // NPOT texture with TEXTURE_MIN_FILTER set to LINEAR should draw
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
    glClear(GL_COLOR_BUFFER_BIT);
    drawQuad(mProgram, "position", 1.0f);
    EXPECT_PIXEL_EQ(getWindowWidth() / 2, getWindowHeight() / 2, 0, 0, 0, 64);

    // Check that glTexImage2D for POT texture succeeds
    glTexImage2D(GL_TEXTURE_2D, 0, GL_ALPHA, potTexSize, potTexSize, 0, GL_ALPHA, GL_UNSIGNED_BYTE,
                 pixels.data());
    EXPECT_GL_NO_ERROR();

    // Check that generateMipmap for an POT texture succeeds
    glGenerateMipmap(GL_TEXTURE_2D);
    EXPECT_GL_NO_ERROR();

    // POT texture with TEXTURE_MIN_FILTER set to LINEAR_MIPMAP_LINEAR should draw
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
    glClear(GL_COLOR_BUFFER_BIT);
    drawQuad(mProgram, "position", 1.0f);
    EXPECT_PIXEL_EQ(getWindowWidth() / 2, getWindowHeight() / 2, 0, 0, 0, 64);
    EXPECT_GL_NO_ERROR();
}

// Test to ensure that glTexSubImage2D always accepts data for non-power-of-two subregions.
// ANGLE previously rejected this if GL_OES_texture_npot wasn't active, which is incorrect.
TEST_P(Texture2DTest, NPOTSubImageParameters)
{
    glActiveTexture(GL_TEXTURE0);
    glBindTexture(GL_TEXTURE_2D, mTexture2D);

    // Create an 8x8 (i.e. power-of-two) texture.
    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 8, 8, 0, GL_RGBA, GL_UNSIGNED_BYTE, nullptr);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_NEAREST);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
    glGenerateMipmap(GL_TEXTURE_2D);

    // Supply a 3x3 (i.e. non-power-of-two) subimage to the texture.
    // This should always work, even if GL_OES_texture_npot isn't active.
    std::array<GLColor, 3 * 3> data;
    glTexSubImage2D(GL_TEXTURE_2D, 1, 0, 0, 3, 3, GL_RGBA, GL_UNSIGNED_BYTE, data.data());

    EXPECT_GL_NO_ERROR();
}

// Regression test for http://crbug.com/949985 to make sure dirty bits are propagated up from
// TextureImpl and the texture is synced before being used in a draw call.
TEST_P(Texture2DTestES3, TextureImplPropogatesDirtyBits)
{
    ANGLE_SKIP_TEST_IF(IsIntel() && IsOpenGL());
    // Flaky hangs on Win10 AMD RX 550 GL. http://anglebug.com/3371
    ANGLE_SKIP_TEST_IF(IsWindows() && IsAMD() && IsOpenGL());
    // D3D Debug device reports an error. http://anglebug.com/3501
    ANGLE_SKIP_TEST_IF(IsWindows() && IsD3D11());
    // TODO(cnorthrop): Needs triage on Vulkan backend. http://anglebug.com/3950
    ANGLE_SKIP_TEST_IF(IsVulkan());

    // The workaround in the GL backend required to trigger this bug generates driver warning
    // messages.
    ScopedIgnorePlatformMessages ignoreMessages;

    setUpProgram();
    glUseProgram(mProgram);
    glActiveTexture(GL_TEXTURE0 + mTexture2DUniformLocation);

    GLTexture dest;
    glBindTexture(GL_TEXTURE_2D, dest);

    GLTexture source;
    glBindTexture(GL_TEXTURE_2D, source);

    // Put data in mip 0 and 1
    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 1, 1, 0, GL_RGBA, GL_UNSIGNED_BYTE,
                 GLColor::red.data());
    glTexImage2D(GL_TEXTURE_2D, 1, GL_RGBA, 1, 1, 0, GL_RGBA, GL_UNSIGNED_BYTE,
                 GLColor::green.data());

    // Disable mipmapping so source is complete
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);

    // Force the dirty bits to be synchronized in source
    drawQuad(mProgram, "position", 1.0f);

    // Copy from mip 1 of the source.  In the GL backend this internally sets the base level to mip
    // 1 and sets a dirty bit.
    glCopyTextureCHROMIUM(source, 1, GL_TEXTURE_2D, dest, 0, GL_RGBA, GL_UNSIGNED_BYTE, GL_FALSE,
                          GL_FALSE, GL_FALSE);

    // Draw again, assertions are generated if the texture has internal dirty bits at draw time
    drawQuad(mProgram, "position", 1.0f);
}

// This test case changes the base level of a texture that's attached to a framebuffer, clears every
// level to green, and then samples the texture when rendering. Test is taken from
// https://www.khronos.org/registry/webgl/sdk/tests/conformance2/rendering/framebuffer-texture-changing-base-level.html
TEST_P(Texture2DTestES3, FramebufferTextureChangingBaselevel)
{
    // TODO(geofflang): Investigate on D3D11. http://anglebug.com/2291
    ANGLE_SKIP_TEST_IF(IsD3D11());

    // TODO(cnorthrop): Failing on Vulkan/Windows/AMD. http://anglebug.com/3996
    ANGLE_SKIP_TEST_IF(IsVulkan() && IsWindows() && IsAMD());

    setUpProgram();

    constexpr GLint width  = 8;
    constexpr GLint height = 4;

    GLTexture texture;
    glBindTexture(GL_TEXTURE_2D, texture);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);

    // Create all mipmap levels for the texture from level 0 to the 1x1 pixel level.
    GLint level  = 0;
    GLint levelW = width;
    GLint levelH = height;
    glTexImage2D(GL_TEXTURE_2D, level, GL_RGBA, levelW, levelH, 0, GL_RGBA, GL_UNSIGNED_BYTE,
                 nullptr);
    while (levelW > 1 || levelH > 1)
    {
        ++level;
        levelW = static_cast<GLint>(std::max(1.0, std::floor(width / std::pow(2, level))));
        levelH = static_cast<GLint>(std::max(1.0, std::floor(height / std::pow(2, level))));
        glTexImage2D(GL_TEXTURE_2D, level, GL_RGBA, levelW, levelH, 0, GL_RGBA, GL_UNSIGNED_BYTE,
                     nullptr);
    }

    // Clear each level of the texture using an FBO. Change the base level to match the level used
    // for the FBO on each iteration.
    GLFramebuffer fbo;
    glBindFramebuffer(GL_FRAMEBUFFER, fbo);
    level  = 0;
    levelW = width;
    levelH = height;
    while (levelW > 1 || levelH > 1)
    {
        levelW = static_cast<GLint>(std::floor(width / std::pow(2, level)));
        levelH = static_cast<GLint>(std::floor(height / std::pow(2, level)));

        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_BASE_LEVEL, level);
        glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, texture, level);

        EXPECT_GLENUM_EQ(GL_FRAMEBUFFER_COMPLETE, glCheckFramebufferStatus(GL_FRAMEBUFFER));
        EXPECT_GL_NO_ERROR();

        glClearColor(0, 1, 0, 1);
        glClear(GL_COLOR_BUFFER_BIT);

        EXPECT_PIXEL_COLOR_EQ(0, 0, GLColor::green);

        ++level;
    }

    glBindFramebuffer(GL_FRAMEBUFFER, 0);
    glViewport(0, 0, 16, 16);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_BASE_LEVEL, 0);

    drawQuad(mProgram, "position", 0.5f);

    EXPECT_GL_NO_ERROR();
    EXPECT_PIXEL_COLOR_EQ(0, 0, GLColor::green);
}

// Test to check that texture completeness is determined correctly when the texture base level is
// greater than 0, and also that level 0 is not sampled when base level is greater than 0.
TEST_P(Texture2DTestES3, DrawWithBaseLevel1)
{
    glActiveTexture(GL_TEXTURE0);
    glBindTexture(GL_TEXTURE_2D, mTexture2D);

    std::vector<GLColor> texDataRed(4u * 4u, GLColor::red);
    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 4, 4, 0, GL_RGBA, GL_UNSIGNED_BYTE, texDataRed.data());
    std::vector<GLColor> texDataGreen(2u * 2u, GLColor::green);
    glTexImage2D(GL_TEXTURE_2D, 1, GL_RGBA, 2, 2, 0, GL_RGBA, GL_UNSIGNED_BYTE,
                 texDataGreen.data());
    glTexImage2D(GL_TEXTURE_2D, 2, GL_RGBA, 1, 1, 0, GL_RGBA, GL_UNSIGNED_BYTE,
                 texDataGreen.data());
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_BASE_LEVEL, 1);

    EXPECT_GL_NO_ERROR();

    drawQuad(mProgram, "position", 0.5f);

    EXPECT_PIXEL_COLOR_EQ(0, 0, GLColor::green);
}

// Test that drawing works correctly when levels outside the BASE_LEVEL/MAX_LEVEL range do not
// have images defined.
TEST_P(Texture2DTestES3, DrawWithLevelsOutsideRangeUndefined)
{
    // Observed crashing on AMD. Oddly the crash only happens with 2D textures, not 3D or array.
    ANGLE_SKIP_TEST_IF(IsAMD() && IsOpenGL());

    glActiveTexture(GL_TEXTURE0);
    glBindTexture(GL_TEXTURE_2D, mTexture2D);
    std::vector<GLColor> texDataGreen(2u * 2u, GLColor::green);
    glTexImage2D(GL_TEXTURE_2D, 1, GL_RGBA8, 2, 2, 0, GL_RGBA, GL_UNSIGNED_BYTE,
                 texDataGreen.data());
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_BASE_LEVEL, 1);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAX_LEVEL, 1);

    EXPECT_GL_NO_ERROR();

    drawQuad(mProgram, "position", 0.5f);

    EXPECT_PIXEL_COLOR_EQ(0, 0, GLColor::green);
}

// Test that drawing works correctly when level 0 is undefined and base level is 1.
TEST_P(Texture2DTestES3, DrawWithLevelZeroUndefined)
{
    // Observed crashing on AMD. Oddly the crash only happens with 2D textures, not 3D or array.
    ANGLE_SKIP_TEST_IF(IsAMD() && IsOpenGL());

    glActiveTexture(GL_TEXTURE0);
    glBindTexture(GL_TEXTURE_2D, mTexture2D);
    std::vector<GLColor> texDataGreen(2u * 2u, GLColor::green);
    glTexImage2D(GL_TEXTURE_2D, 1, GL_RGBA8, 2, 2, 0, GL_RGBA, GL_UNSIGNED_BYTE,
                 texDataGreen.data());
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_BASE_LEVEL, 1);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAX_LEVEL, 2);

    EXPECT_GL_NO_ERROR();

    // Texture is incomplete.
    drawQuad(mProgram, "position", 0.5f);
    EXPECT_PIXEL_COLOR_EQ(0, 0, GLColor::black);

    glTexImage2D(GL_TEXTURE_2D, 2, GL_RGBA8, 1, 1, 0, GL_RGBA, GL_UNSIGNED_BYTE,
                 texDataGreen.data());

    // Texture is now complete.
    drawQuad(mProgram, "position", 0.5f);
    EXPECT_PIXEL_COLOR_EQ(0, 0, GLColor::green);
}

// Test that drawing works correctly when levels outside the BASE_LEVEL/MAX_LEVEL range have
// dimensions that don't fit the images inside the range.
// GLES 3.0.4 section 3.8.13 Texture completeness
TEST_P(Texture2DTestES3, DrawWithLevelsOutsideRangeWithInconsistentDimensions)
{
    glActiveTexture(GL_TEXTURE0);
    glBindTexture(GL_TEXTURE_2D, mTexture2D);
    std::vector<GLColor> texDataRed(8u * 8u, GLColor::red);
    std::vector<GLColor> texDataGreen(2u * 2u, GLColor::green);
    std::vector<GLColor> texDataCyan(2u * 2u, GLColor::cyan);

    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);

    // Two levels that are initially unused.
    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, 8, 8, 0, GL_RGBA, GL_UNSIGNED_BYTE, texDataRed.data());
    glTexImage2D(GL_TEXTURE_2D, 2, GL_RGBA8, 2, 2, 0, GL_RGBA, GL_UNSIGNED_BYTE,
                 texDataCyan.data());

    // One level that is used - only this level should affect completeness.
    glTexImage2D(GL_TEXTURE_2D, 1, GL_RGBA8, 2, 2, 0, GL_RGBA, GL_UNSIGNED_BYTE,
                 texDataGreen.data());

    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_BASE_LEVEL, 1);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAX_LEVEL, 1);

    EXPECT_GL_NO_ERROR();

    drawQuad(mProgram, "position", 0.5f);

    EXPECT_PIXEL_COLOR_EQ(0, 0, GLColor::green);

    ANGLE_SKIP_TEST_IF(IsIntel() && IsWindows() && IsOpenGL());

    // Switch the level that is being used to the cyan level 2.
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_BASE_LEVEL, 2);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAX_LEVEL, 2);

    EXPECT_GL_NO_ERROR();

    drawQuad(mProgram, "position", 0.5f);

    EXPECT_PIXEL_COLOR_EQ(0, 0, GLColor::cyan);
}

// Test that drawing works correctly when levels outside the BASE_LEVEL/MAX_LEVEL range do not
// have images defined.
TEST_P(Texture3DTestES3, DrawWithLevelsOutsideRangeUndefined)
{
    glActiveTexture(GL_TEXTURE0);
    glBindTexture(GL_TEXTURE_3D, mTexture3D);
    std::vector<GLColor> texDataGreen(2u * 2u * 2u, GLColor::green);
    glTexImage3D(GL_TEXTURE_3D, 1, GL_RGBA8, 2, 2, 2, 0, GL_RGBA, GL_UNSIGNED_BYTE,
                 texDataGreen.data());
    glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
    glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
    glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_BASE_LEVEL, 1);
    glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_MAX_LEVEL, 1);

    EXPECT_GL_NO_ERROR();

    drawQuad(mProgram, "position", 0.5f);

    EXPECT_PIXEL_COLOR_EQ(0, 0, GLColor::green);
}

// Test that drawing works correctly when levels outside the BASE_LEVEL/MAX_LEVEL range have
// dimensions that don't fit the images inside the range.
// GLES 3.0.4 section 3.8.13 Texture completeness
TEST_P(Texture3DTestES3, DrawWithLevelsOutsideRangeWithInconsistentDimensions)
{
    // Crashes on Intel Ubuntu 19.04 Mesa 19.0.2 GL. http://anglebug.com/2782
    ANGLE_SKIP_TEST_IF(IsLinux() && IsIntel() && IsDesktopOpenGL());

    glActiveTexture(GL_TEXTURE0);
    glBindTexture(GL_TEXTURE_3D, mTexture3D);
    std::vector<GLColor> texDataRed(8u * 8u * 8u, GLColor::red);
    std::vector<GLColor> texDataGreen(2u * 2u * 2u, GLColor::green);
    std::vector<GLColor> texDataCyan(2u * 2u * 2u, GLColor::cyan);

    glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
    glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);

    // Two levels that are initially unused.
    glTexImage3D(GL_TEXTURE_3D, 0, GL_RGBA8, 8, 8, 8, 0, GL_RGBA, GL_UNSIGNED_BYTE,
                 texDataRed.data());
    glTexImage3D(GL_TEXTURE_3D, 2, GL_RGBA8, 2, 2, 2, 0, GL_RGBA, GL_UNSIGNED_BYTE,
                 texDataCyan.data());

    // One level that is used - only this level should affect completeness.
    glTexImage3D(GL_TEXTURE_3D, 1, GL_RGBA8, 2, 2, 2, 0, GL_RGBA, GL_UNSIGNED_BYTE,
                 texDataGreen.data());

    glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_BASE_LEVEL, 1);
    glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_MAX_LEVEL, 1);

    EXPECT_GL_NO_ERROR();

    drawQuad(mProgram, "position", 0.5f);

    EXPECT_PIXEL_COLOR_EQ(0, 0, GLColor::green);

    ANGLE_SKIP_TEST_IF(IsIntel() && IsWindows() && IsOpenGL());

    // Switch the level that is being used to the cyan level 2.
    glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_BASE_LEVEL, 2);
    glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_MAX_LEVEL, 2);

    EXPECT_GL_NO_ERROR();

    drawQuad(mProgram, "position", 0.5f);

    EXPECT_PIXEL_COLOR_EQ(0, 0, GLColor::cyan);
}

// Test that drawing works correctly when levels outside the BASE_LEVEL/MAX_LEVEL range do not
// have images defined.
TEST_P(Texture2DArrayTestES3, DrawWithLevelsOutsideRangeUndefined)
{
    glActiveTexture(GL_TEXTURE0);
    glBindTexture(GL_TEXTURE_2D_ARRAY, m2DArrayTexture);
    std::vector<GLColor> texDataGreen(2u * 2u * 2u, GLColor::green);
    glTexImage3D(GL_TEXTURE_2D_ARRAY, 1, GL_RGBA8, 2, 2, 2, 0, GL_RGBA, GL_UNSIGNED_BYTE,
                 texDataGreen.data());
    glTexParameteri(GL_TEXTURE_2D_ARRAY, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
    glTexParameteri(GL_TEXTURE_2D_ARRAY, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
    glTexParameteri(GL_TEXTURE_2D_ARRAY, GL_TEXTURE_BASE_LEVEL, 1);
    glTexParameteri(GL_TEXTURE_2D_ARRAY, GL_TEXTURE_MAX_LEVEL, 1);

    EXPECT_GL_NO_ERROR();

    drawQuad(mProgram, "position", 0.5f);

    EXPECT_PIXEL_COLOR_EQ(0, 0, GLColor::green);
}

// Test that drawing works correctly when levels outside the BASE_LEVEL/MAX_LEVEL range have
// dimensions that don't fit the images inside the range.
// GLES 3.0.4 section 3.8.13 Texture completeness
TEST_P(Texture2DArrayTestES3, DrawWithLevelsOutsideRangeWithInconsistentDimensions)
{
    // TODO(crbug.com/998505): Test failing on Android FYI Release (NVIDIA Shield TV)
    ANGLE_SKIP_TEST_IF(IsNVIDIAShield());

    glActiveTexture(GL_TEXTURE0);
    glBindTexture(GL_TEXTURE_3D, m2DArrayTexture);
    std::vector<GLColor> texDataRed(8u * 8u * 8u, GLColor::red);
    std::vector<GLColor> texDataGreen(2u * 2u * 2u, GLColor::green);
    std::vector<GLColor> texDataCyan(2u * 2u * 2u, GLColor::cyan);

    glTexParameteri(GL_TEXTURE_2D_ARRAY, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
    glTexParameteri(GL_TEXTURE_2D_ARRAY, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);

    // Two levels that are initially unused.
    glTexImage3D(GL_TEXTURE_2D_ARRAY, 0, GL_RGBA8, 8, 8, 8, 0, GL_RGBA, GL_UNSIGNED_BYTE,
                 texDataRed.data());
    glTexImage3D(GL_TEXTURE_2D_ARRAY, 2, GL_RGBA8, 2, 2, 2, 0, GL_RGBA, GL_UNSIGNED_BYTE,
                 texDataCyan.data());

    // One level that is used - only this level should affect completeness.
    glTexImage3D(GL_TEXTURE_2D_ARRAY, 1, GL_RGBA8, 2, 2, 2, 0, GL_RGBA, GL_UNSIGNED_BYTE,
                 texDataGreen.data());

    glTexParameteri(GL_TEXTURE_2D_ARRAY, GL_TEXTURE_BASE_LEVEL, 1);
    glTexParameteri(GL_TEXTURE_2D_ARRAY, GL_TEXTURE_MAX_LEVEL, 1);

    EXPECT_GL_NO_ERROR();

    drawQuad(mProgram, "position", 0.5f);

    EXPECT_PIXEL_COLOR_EQ(0, 0, GLColor::green);

    ANGLE_SKIP_TEST_IF(IsIntel() && IsWindows() && IsOpenGL());

    // Switch the level that is being used to the cyan level 2.
    glTexParameteri(GL_TEXTURE_2D_ARRAY, GL_TEXTURE_BASE_LEVEL, 2);
    glTexParameteri(GL_TEXTURE_2D_ARRAY, GL_TEXTURE_MAX_LEVEL, 2);

    EXPECT_GL_NO_ERROR();

    drawQuad(mProgram, "position", 0.5f);

    EXPECT_PIXEL_COLOR_EQ(0, 0, GLColor::cyan);
}

// Test that texture completeness is updated if texture max level changes.
// GLES 3.0.4 section 3.8.13 Texture completeness
TEST_P(Texture2DTestES3, TextureCompletenessChangesWithMaxLevel)
{
    glActiveTexture(GL_TEXTURE0);
    glBindTexture(GL_TEXTURE_2D, mTexture2D);
    std::vector<GLColor> texDataGreen(8u * 8u, GLColor::green);

    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);

    // A level that is initially unused.
    glTexImage2D(GL_TEXTURE_2D, 1, GL_RGBA8, 8, 8, 0, GL_RGBA, GL_UNSIGNED_BYTE,
                 texDataGreen.data());

    // One level that is initially used - only this level should affect completeness.
    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, 2, 2, 0, GL_RGBA, GL_UNSIGNED_BYTE,
                 texDataGreen.data());

    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_BASE_LEVEL, 0);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAX_LEVEL, 0);

    EXPECT_GL_NO_ERROR();

    drawQuad(mProgram, "position", 0.5f);

    EXPECT_PIXEL_COLOR_EQ(0, 0, GLColor::green);

    // Switch the max level to level 1. The levels within the used range now have inconsistent
    // dimensions and the texture should be incomplete.
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAX_LEVEL, 1);

    EXPECT_GL_NO_ERROR();

    drawQuad(mProgram, "position", 0.5f);

    EXPECT_PIXEL_COLOR_EQ(0, 0, GLColor::black);
}

// Test that 3D texture completeness is updated if texture max level changes.
// GLES 3.0.4 section 3.8.13 Texture completeness
TEST_P(Texture3DTestES3, Texture3DCompletenessChangesWithMaxLevel)
{
    glActiveTexture(GL_TEXTURE0);
    glBindTexture(GL_TEXTURE_3D, mTexture3D);
    std::vector<GLColor> texDataGreen(2u * 2u * 2u, GLColor::green);

    glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
    glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);

    // A level that is initially unused.
    glTexImage3D(GL_TEXTURE_3D, 1, GL_RGBA8, 1, 1, 2, 0, GL_RGBA, GL_UNSIGNED_BYTE,
                 texDataGreen.data());

    // One level that is initially used - only this level should affect completeness.
    glTexImage3D(GL_TEXTURE_3D, 0, GL_RGBA8, 2, 2, 2, 0, GL_RGBA, GL_UNSIGNED_BYTE,
                 texDataGreen.data());

    glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_BASE_LEVEL, 0);
    glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_MAX_LEVEL, 0);

    EXPECT_GL_NO_ERROR();

    drawQuad(mProgram, "position", 0.5f);

    EXPECT_PIXEL_COLOR_EQ(0, 0, GLColor::green);

    // Switch the max level to level 1. The levels within the used range now have inconsistent
    // dimensions and the texture should be incomplete.
    glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_MAX_LEVEL, 1);

    EXPECT_GL_NO_ERROR();

    drawQuad(mProgram, "position", 0.5f);

    EXPECT_PIXEL_COLOR_EQ(0, 0, GLColor::black);
}

// Test that texture completeness is updated if texture base level changes.
// GLES 3.0.4 section 3.8.13 Texture completeness
TEST_P(Texture2DTestES3, TextureCompletenessChangesWithBaseLevel)
{
    glActiveTexture(GL_TEXTURE0);
    glBindTexture(GL_TEXTURE_2D, mTexture2D);
    std::vector<GLColor> texDataGreen(8u * 8u, GLColor::green);

    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);

    // Two levels that are initially unused.
    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, 8, 8, 0, GL_RGBA, GL_UNSIGNED_BYTE,
                 texDataGreen.data());
    glTexImage2D(GL_TEXTURE_2D, 1, GL_RGBA8, 2, 2, 0, GL_RGBA, GL_UNSIGNED_BYTE,
                 texDataGreen.data());

    // One level that is initially used - only this level should affect completeness.
    glTexImage2D(GL_TEXTURE_2D, 2, GL_RGBA8, 2, 2, 0, GL_RGBA, GL_UNSIGNED_BYTE,
                 texDataGreen.data());

    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_BASE_LEVEL, 2);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAX_LEVEL, 2);

    EXPECT_GL_NO_ERROR();

    drawQuad(mProgram, "position", 0.5f);

    EXPECT_PIXEL_COLOR_EQ(0, 0, GLColor::green);

    // Switch the base level to level 1. The levels within the used range now have inconsistent
    // dimensions and the texture should be incomplete.
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_BASE_LEVEL, 1);

    EXPECT_GL_NO_ERROR();

    drawQuad(mProgram, "position", 0.5f);

    EXPECT_PIXEL_COLOR_EQ(0, 0, GLColor::black);
}

// Test that texture is not complete if base level is greater than max level.
// GLES 3.0.4 section 3.8.13 Texture completeness
TEST_P(Texture2DTestES3, TextureBaseLevelGreaterThanMaxLevel)
{
    glActiveTexture(GL_TEXTURE0);
    glBindTexture(GL_TEXTURE_2D, mTexture2D);

    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);

    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, 1, 1, 0, GL_RGBA, GL_UNSIGNED_BYTE, &GLColor::green);

    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_BASE_LEVEL, 10000);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAX_LEVEL, 0);

    EXPECT_GL_NO_ERROR();

    drawQuad(mProgram, "position", 0.5f);

    // Texture should be incomplete.
    EXPECT_PIXEL_COLOR_EQ(0, 0, GLColor::black);
}

// Test that immutable texture base level and max level are clamped.
// GLES 3.0.4 section 3.8.10 subsection Mipmapping
TEST_P(Texture2DTestES3, ImmutableTextureBaseLevelOutOfRange)
{
    glActiveTexture(GL_TEXTURE0);
    glBindTexture(GL_TEXTURE_2D, mTexture2D);

    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);

    glTexStorage2D(GL_TEXTURE_2D, 1, GL_RGBA8, 1, 1);

    glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, 1, 1, GL_RGBA, GL_UNSIGNED_BYTE, &GLColor::green);

    // For immutable-format textures, base level should be clamped to [0, levels - 1], and max level
    // should be clamped to [base_level, levels - 1].
    // GLES 3.0.4 section 3.8.10 subsection Mipmapping
    // In the case of this test, those rules make the effective base level and max level 0.
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_BASE_LEVEL, 10000);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAX_LEVEL, 10000);

    EXPECT_GL_NO_ERROR();

    drawQuad(mProgram, "position", 0.5f);

    // Texture should be complete.
    EXPECT_PIXEL_COLOR_EQ(0, 0, GLColor::green);
}

// Test that changing base level works when it affects the format of the texture.
TEST_P(Texture2DTestES3, TextureFormatChangesWithBaseLevel)
{
    // TODO(crbug.com/998505): Test failing on Android FYI Release (NVIDIA Shield TV)
    ANGLE_SKIP_TEST_IF(IsNVIDIAShield());

    ANGLE_SKIP_TEST_IF(IsIntel() && IsWindows() && IsDesktopOpenGL());

    // Observed incorrect rendering on AMD OpenGL.
    ANGLE_SKIP_TEST_IF(IsAMD() && IsDesktopOpenGL());

    glActiveTexture(GL_TEXTURE0);
    glBindTexture(GL_TEXTURE_2D, mTexture2D);
    std::vector<GLColor> texDataCyan(4u * 4u, GLColor::cyan);
    std::vector<GLColor> texDataGreen(4u * 4u, GLColor::green);

    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);

    // RGBA8 level that's initially unused.
    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, 4, 4, 0, GL_RGBA, GL_UNSIGNED_BYTE,
                 texDataCyan.data());

    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_BASE_LEVEL, 1);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAX_LEVEL, 1);

    // RG8 level that's initially used, with consistent dimensions with level 0 but a different
    // format. It reads green channel data from the green and alpha channels of texDataGreen
    // (this is a bit hacky but works).
    glTexImage2D(GL_TEXTURE_2D, 1, GL_RG8, 2, 2, 0, GL_RG, GL_UNSIGNED_BYTE, texDataGreen.data());

    EXPECT_GL_NO_ERROR();

    drawQuad(mProgram, "position", 0.5f);

    EXPECT_PIXEL_COLOR_EQ(0, 0, GLColor::green);

    // Switch the texture to use the cyan level 0 with the RGBA format.
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_BASE_LEVEL, 0);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAX_LEVEL, 0);

    EXPECT_GL_NO_ERROR();

    drawQuad(mProgram, "position", 0.5f);

    EXPECT_PIXEL_COLOR_EQ(0, 0, GLColor::cyan);
}

// Test that setting a texture image works when base level is out of range.
TEST_P(Texture2DTestES3, SetImageWhenBaseLevelOutOfRange)
{
    glActiveTexture(GL_TEXTURE0);
    glBindTexture(GL_TEXTURE_2D, mTexture2D);

    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);

    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_BASE_LEVEL, 10000);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAX_LEVEL, 10000);

    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, 1, 1, 0, GL_RGBA, GL_UNSIGNED_BYTE, &GLColor::green);

    EXPECT_GL_NO_ERROR();

    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_BASE_LEVEL, 0);

    drawQuad(mProgram, "position", 0.5f);

    // Texture should be complete.
    EXPECT_PIXEL_COLOR_EQ(0, 0, GLColor::green);
}

// In the D3D11 renderer, we need to initialize some texture formats, to fill empty channels. EG
// RBA->RGBA8, with 1.0 in the alpha channel. This test covers a bug where redefining array textures
// with these formats does not work as expected.
TEST_P(Texture2DArrayTestES3, RedefineInittableArray)
{
    std::vector<GLubyte> pixelData;
    for (size_t count = 0; count < 5000; count++)
    {
        pixelData.push_back(0u);
        pixelData.push_back(255u);
        pixelData.push_back(0u);
    }

    glBindTexture(GL_TEXTURE_2D_ARRAY, m2DArrayTexture);
    glUseProgram(mProgram);
    glUniform1i(mTextureArrayLocation, 0);

    // The first draw worked correctly.
    glTexImage3D(GL_TEXTURE_2D_ARRAY, 0, GL_RGB, 4, 4, 2, 0, GL_RGB, GL_UNSIGNED_BYTE,
                 &pixelData[0]);

    glTexParameteri(GL_TEXTURE_2D_ARRAY, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
    glTexParameteri(GL_TEXTURE_2D_ARRAY, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
    glTexParameteri(GL_TEXTURE_2D_ARRAY, GL_TEXTURE_WRAP_S, GL_REPEAT);
    glTexParameteri(GL_TEXTURE_2D_ARRAY, GL_TEXTURE_WRAP_T, GL_REPEAT);
    drawQuad(mProgram, "position", 1.0f);
    EXPECT_PIXEL_COLOR_EQ(0, 0, GLColor::green);

    // The dimension of the respecification must match the original exactly to trigger the bug.
    glTexImage3D(GL_TEXTURE_2D_ARRAY, 0, GL_RGB, 4, 4, 2, 0, GL_RGB, GL_UNSIGNED_BYTE,
                 &pixelData[0]);
    drawQuad(mProgram, "position", 1.0f);
    EXPECT_PIXEL_COLOR_EQ(0, 0, GLColor::green);

    ASSERT_GL_NO_ERROR();
}

// Test shadow sampler and regular non-shadow sampler coexisting in the same shader.
// This test is needed especially to confirm that sampler registers get assigned correctly on
// the HLSL backend even when there's a mix of different HLSL sampler and texture types.
TEST_P(ShadowSamplerPlusSampler3DTestES3, ShadowSamplerPlusSampler3DDraw)
{
    glActiveTexture(GL_TEXTURE0);
    glBindTexture(GL_TEXTURE_3D, mTexture3D);
    GLubyte texData[4];
    texData[0] = 0;
    texData[1] = 60;
    texData[2] = 0;
    texData[3] = 255;
    glTexImage3D(GL_TEXTURE_3D, 0, GL_RGBA, 1, 1, 1, 0, GL_RGBA, GL_UNSIGNED_BYTE, texData);

    glActiveTexture(GL_TEXTURE1);
    glBindTexture(GL_TEXTURE_2D, mTextureShadow);
    GLfloat depthTexData[1];
    depthTexData[0] = 0.5f;
    glTexImage2D(GL_TEXTURE_2D, 0, GL_DEPTH_COMPONENT32F, 1, 1, 0, GL_DEPTH_COMPONENT, GL_FLOAT,
                 depthTexData);

    glUseProgram(mProgram);
    glUniform1f(mDepthRefUniformLocation, 0.3f);
    glUniform1i(mTexture3DUniformLocation, 0);
    glUniform1i(mTextureShadowUniformLocation, 1);

    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_COMPARE_FUNC, GL_LEQUAL);
    drawQuad(mProgram, "position", 0.5f);
    EXPECT_GL_NO_ERROR();
    // The shader writes 0.5 * <comparison result (1.0)> + <texture color>
    EXPECT_PIXEL_NEAR(0, 0, 128, 188, 128, 255, 2);

    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_COMPARE_FUNC, GL_GREATER);
    drawQuad(mProgram, "position", 0.5f);
    EXPECT_GL_NO_ERROR();
    // The shader writes 0.5 * <comparison result (0.0)> + <texture color>
    EXPECT_PIXEL_NEAR(0, 0, 0, 60, 0, 255, 2);
}

// Test multiple different sampler types in the same shader.
// This test makes sure that even if sampler / texture registers get grouped together based on type
// or otherwise get shuffled around in the HLSL backend of the shader translator, the D3D renderer
// still has the right register index information for each ESSL sampler.
// The tested ESSL samplers have the following types in D3D11 HLSL:
// sampler2D:         Texture2D   + SamplerState
// samplerCube:       TextureCube + SamplerState
// sampler2DShadow:   Texture2D   + SamplerComparisonState
// samplerCubeShadow: TextureCube + SamplerComparisonState
TEST_P(SamplerTypeMixTestES3, SamplerTypeMixDraw)
{
    glActiveTexture(GL_TEXTURE0);
    glBindTexture(GL_TEXTURE_2D, mTexture2D);
    GLubyte texData[4];
    texData[0] = 0;
    texData[1] = 0;
    texData[2] = 120;
    texData[3] = 255;
    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 1, 1, 0, GL_RGBA, GL_UNSIGNED_BYTE, texData);

    glActiveTexture(GL_TEXTURE1);
    glBindTexture(GL_TEXTURE_CUBE_MAP, mTextureCube);
    texData[0] = 0;
    texData[1] = 90;
    texData[2] = 0;
    texData[3] = 255;
    glTexStorage2D(GL_TEXTURE_CUBE_MAP, 1, GL_RGBA8, 1, 1);
    glTexSubImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_X, 0, 0, 0, 1, 1, GL_RGBA, GL_UNSIGNED_BYTE,
                    texData);

    glActiveTexture(GL_TEXTURE2);
    glBindTexture(GL_TEXTURE_2D, mTexture2DShadow);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_COMPARE_FUNC, GL_LEQUAL);
    GLfloat depthTexData[1];
    depthTexData[0] = 0.5f;
    glTexImage2D(GL_TEXTURE_2D, 0, GL_DEPTH_COMPONENT32F, 1, 1, 0, GL_DEPTH_COMPONENT, GL_FLOAT,
                 depthTexData);

    glActiveTexture(GL_TEXTURE3);
    glBindTexture(GL_TEXTURE_CUBE_MAP, mTextureCubeShadow);
    glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_COMPARE_FUNC, GL_LEQUAL);
    depthTexData[0] = 0.2f;
    glTexStorage2D(GL_TEXTURE_CUBE_MAP, 1, GL_DEPTH_COMPONENT32F, 1, 1);
    glTexSubImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_X, 0, 0, 0, 1, 1, GL_DEPTH_COMPONENT, GL_FLOAT,
                    depthTexData);

    // http://anglebug.com/3949: TODO: Add a DS texture case

    EXPECT_GL_NO_ERROR();

    glUseProgram(mProgram);
    glUniform1f(mDepthRefUniformLocation, 0.3f);
    glUniform1i(mTexture2DUniformLocation, 0);
    glUniform1i(mTextureCubeUniformLocation, 1);
    glUniform1i(mTexture2DShadowUniformLocation, 2);
    glUniform1i(mTextureCubeShadowUniformLocation, 3);

    drawQuad(mProgram, "position", 0.5f);
    EXPECT_GL_NO_ERROR();
    // The shader writes:
    // <texture 2d color> +
    // <cube map color> +
    // 0.25 * <comparison result (1.0)> +
    // 0.125 * <comparison result (0.0)>
    EXPECT_PIXEL_NEAR(0, 0, 64, 154, 184, 255, 2);
}

// Test different base levels on textures accessed through the same sampler array.
// Calling textureSize() on the samplers hits the D3D sampler metadata workaround.
TEST_P(TextureSizeTextureArrayTest, BaseLevelVariesInTextureArray)
{
    ANGLE_SKIP_TEST_IF(IsAMD() && IsD3D11());

    glActiveTexture(GL_TEXTURE0);
    glBindTexture(GL_TEXTURE_2D, mTexture2DA);
    GLsizei size = 64;
    for (GLint level = 0; level < 7; ++level)
    {
        ASSERT_LT(0, size);
        glTexImage2D(GL_TEXTURE_2D, level, GL_RGBA, size, size, 0, GL_RGBA, GL_UNSIGNED_BYTE,
                     nullptr);
        size = size / 2;
    }
    ASSERT_EQ(0, size);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_BASE_LEVEL, 1);

    glActiveTexture(GL_TEXTURE1);
    glBindTexture(GL_TEXTURE_2D, mTexture2DB);
    size = 128;
    for (GLint level = 0; level < 8; ++level)
    {
        ASSERT_LT(0, size);
        glTexImage2D(GL_TEXTURE_2D, level, GL_RGBA, size, size, 0, GL_RGBA, GL_UNSIGNED_BYTE,
                     nullptr);
        size = size / 2;
    }
    ASSERT_EQ(0, size);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_BASE_LEVEL, 3);
    EXPECT_GL_NO_ERROR();

    glUseProgram(mProgram);
    glUniform1i(mTexture0Location, 0);
    glUniform1i(mTexture1Location, 1);

    drawQuad(mProgram, essl3_shaders::PositionAttrib(), 0.5f);
    EXPECT_GL_NO_ERROR();
    // Red channel: width of level 1 of texture A: 32.
    // Green channel: width of level 3 of texture B: 16.
    EXPECT_PIXEL_NEAR(0, 0, 32, 16, 0, 255, 2);
}

// When sampling a texture without an alpha channel, "1" is returned as the alpha value.
// ES 3.0.4 table 3.24
TEST_P(Texture2DTestES3, TextureRGBImplicitAlpha1)
{
    glActiveTexture(GL_TEXTURE0);
    glBindTexture(GL_TEXTURE_2D, mTexture2D);
    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB8, 1, 1, 0, GL_RGB, GL_UNSIGNED_BYTE, nullptr);
    EXPECT_GL_NO_ERROR();

    drawQuad(mProgram, "position", 0.5f);

    EXPECT_PIXEL_ALPHA_EQ(0, 0, 255);
}

// When sampling a texture without an alpha channel, "1" is returned as the alpha value.
// ES 3.0.4 table 3.24
TEST_P(Texture2DTest, TextureLuminanceImplicitAlpha1)
{
    setUpProgram();

    glActiveTexture(GL_TEXTURE0);
    glBindTexture(GL_TEXTURE_2D, mTexture2D);
    glTexImage2D(GL_TEXTURE_2D, 0, GL_LUMINANCE, 1, 1, 0, GL_LUMINANCE, GL_UNSIGNED_BYTE, nullptr);
    EXPECT_GL_NO_ERROR();

    drawQuad(mProgram, "position", 0.5f);

    EXPECT_PIXEL_ALPHA_EQ(0, 0, 255);
}

// Validate that every component of the pixel will be equal to the luminance value we've set
// and that the alpha channel will be 1 (or 255 to be exact).
TEST_P(Texture2DTest, TextureLuminanceRGBSame)
{
    setUpProgram();

    glActiveTexture(GL_TEXTURE0);
    glBindTexture(GL_TEXTURE_2D, mTexture2D);
    uint8_t pixel = 50;
    glTexImage2D(GL_TEXTURE_2D, 0, GL_LUMINANCE, 1, 1, 0, GL_LUMINANCE, GL_UNSIGNED_BYTE, &pixel);
    EXPECT_GL_NO_ERROR();

    drawQuad(mProgram, "position", 0.5f);

    EXPECT_PIXEL_COLOR_EQ(0, 0, GLColor(pixel, pixel, pixel, 255));
}

// Validate that every component of the pixel will be equal to the luminance value we've set
// and that the alpha channel will be the second component.
TEST_P(Texture2DTest, TextureLuminanceAlphaRGBSame)
{
    setUpProgram();

    glActiveTexture(GL_TEXTURE0);
    glBindTexture(GL_TEXTURE_2D, mTexture2D);
    uint8_t pixel[] = {50, 25};
    glTexImage2D(GL_TEXTURE_2D, 0, GL_LUMINANCE_ALPHA, 1, 1, 0, GL_LUMINANCE_ALPHA,
                 GL_UNSIGNED_BYTE, pixel);
    EXPECT_GL_NO_ERROR();

    drawQuad(mProgram, "position", 0.5f);

    EXPECT_PIXEL_COLOR_EQ(0, 0, GLColor(pixel[0], pixel[0], pixel[0], pixel[1]));
}

// When sampling a texture without an alpha channel, "1" is returned as the alpha value.
// ES 3.0.4 table 3.24
TEST_P(Texture2DTest, TextureLuminance32ImplicitAlpha1)
{
    ANGLE_SKIP_TEST_IF(!IsGLExtensionEnabled("GL_OES_texture_float"));
    ANGLE_SKIP_TEST_IF(IsD3D9());
    ANGLE_SKIP_TEST_IF(IsVulkan());

    setUpProgram();

    glActiveTexture(GL_TEXTURE0);
    glBindTexture(GL_TEXTURE_2D, mTexture2D);
    glTexImage2D(GL_TEXTURE_2D, 0, GL_LUMINANCE, 1, 1, 0, GL_LUMINANCE, GL_FLOAT, nullptr);
    EXPECT_GL_NO_ERROR();

    drawQuad(mProgram, "position", 0.5f);

    EXPECT_PIXEL_ALPHA_EQ(0, 0, 255);
}

// When sampling a texture without an alpha channel, "1" is returned as the alpha value.
// ES 3.0.4 table 3.24
TEST_P(Texture2DTest, TextureLuminance16ImplicitAlpha1)
{
    ANGLE_SKIP_TEST_IF(!IsGLExtensionEnabled("GL_OES_texture_float"));
    ANGLE_SKIP_TEST_IF(IsD3D9());
    ANGLE_SKIP_TEST_IF(IsVulkan());
    // TODO(ynovikov): re-enable once root cause of http://anglebug.com/1420 is fixed
    ANGLE_SKIP_TEST_IF(IsAndroid() && IsAdreno() && IsOpenGLES());

    setUpProgram();

    glActiveTexture(GL_TEXTURE0);
    glBindTexture(GL_TEXTURE_2D, mTexture2D);
    glTexImage2D(GL_TEXTURE_2D, 0, GL_LUMINANCE, 1, 1, 0, GL_LUMINANCE, GL_HALF_FLOAT_OES, nullptr);
    EXPECT_GL_NO_ERROR();

    drawQuad(mProgram, "position", 0.5f);

    EXPECT_PIXEL_ALPHA_EQ(0, 0, 255);
}

// When sampling a texture without an alpha channel, "1" is returned as the alpha value.
// ES 3.0.4 table 3.24
TEST_P(Texture2DUnsignedIntegerAlpha1TestES3, TextureRGB8UIImplicitAlpha1)
{
    ANGLE_SKIP_TEST_IF(IsIntel() && IsOSX());

    glActiveTexture(GL_TEXTURE0);
    glBindTexture(GL_TEXTURE_2D, mTexture2D);
    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB8UI, 1, 1, 0, GL_RGB_INTEGER, GL_UNSIGNED_BYTE, nullptr);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
    EXPECT_GL_NO_ERROR();

    drawQuad(mProgram, "position", 0.5f);

    EXPECT_PIXEL_ALPHA_EQ(0, 0, 255);
}

// When sampling a texture without an alpha channel, "1" is returned as the alpha value.
// ES 3.0.4 table 3.24
TEST_P(Texture2DIntegerAlpha1TestES3, TextureRGB8IImplicitAlpha1)
{
    ANGLE_SKIP_TEST_IF(IsIntel() && IsOSX());

    glActiveTexture(GL_TEXTURE0);
    glBindTexture(GL_TEXTURE_2D, mTexture2D);

    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB8I, 1, 1, 0, GL_RGB_INTEGER, GL_BYTE, nullptr);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
    EXPECT_GL_NO_ERROR();

    drawQuad(mProgram, "position", 0.5f);

    EXPECT_PIXEL_ALPHA_EQ(0, 0, 255);
}

// When sampling a texture without an alpha channel, "1" is returned as the alpha value.
// ES 3.0.4 table 3.24
TEST_P(Texture2DUnsignedIntegerAlpha1TestES3, TextureRGB16UIImplicitAlpha1)
{
    ANGLE_SKIP_TEST_IF(IsIntel() && IsOSX());

    glActiveTexture(GL_TEXTURE0);
    glBindTexture(GL_TEXTURE_2D, mTexture2D);
    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB16UI, 1, 1, 0, GL_RGB_INTEGER, GL_UNSIGNED_SHORT, nullptr);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
    EXPECT_GL_NO_ERROR();

    drawQuad(mProgram, "position", 0.5f);

    EXPECT_PIXEL_ALPHA_EQ(0, 0, 255);
}

// When sampling a texture without an alpha channel, "1" is returned as the alpha value.
// ES 3.0.4 table 3.24
TEST_P(Texture2DIntegerAlpha1TestES3, TextureRGB16IImplicitAlpha1)
{
    ANGLE_SKIP_TEST_IF(IsIntel() && IsOSX());

    glActiveTexture(GL_TEXTURE0);
    glBindTexture(GL_TEXTURE_2D, mTexture2D);
    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB16I, 1, 1, 0, GL_RGB_INTEGER, GL_SHORT, nullptr);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
    EXPECT_GL_NO_ERROR();

    drawQuad(mProgram, "position", 0.5f);

    EXPECT_PIXEL_ALPHA_EQ(0, 0, 255);
}

// When sampling a texture without an alpha channel, "1" is returned as the alpha value.
// ES 3.0.4 table 3.24
TEST_P(Texture2DUnsignedIntegerAlpha1TestES3, TextureRGB32UIImplicitAlpha1)
{
    ANGLE_SKIP_TEST_IF(IsIntel() && IsOSX());

    glActiveTexture(GL_TEXTURE0);
    glBindTexture(GL_TEXTURE_2D, mTexture2D);
    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB32UI, 1, 1, 0, GL_RGB_INTEGER, GL_UNSIGNED_INT, nullptr);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
    EXPECT_GL_NO_ERROR();

    drawQuad(mProgram, "position", 0.5f);

    EXPECT_PIXEL_ALPHA_EQ(0, 0, 255);
}

// When sampling a texture without an alpha channel, "1" is returned as the alpha value.
// ES 3.0.4 table 3.24
TEST_P(Texture2DIntegerAlpha1TestES3, TextureRGB32IImplicitAlpha1)
{
    ANGLE_SKIP_TEST_IF(IsIntel() && IsOSX());

    glActiveTexture(GL_TEXTURE0);
    glBindTexture(GL_TEXTURE_2D, mTexture2D);
    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB32I, 1, 1, 0, GL_RGB_INTEGER, GL_INT, nullptr);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
    EXPECT_GL_NO_ERROR();

    drawQuad(mProgram, "position", 0.5f);

    EXPECT_PIXEL_ALPHA_EQ(0, 0, 255);
}

// When sampling a texture without an alpha channel, "1" is returned as the alpha value.
// ES 3.0.4 table 3.24
TEST_P(Texture2DTestES3, TextureRGBSNORMImplicitAlpha1)
{
    glActiveTexture(GL_TEXTURE0);
    glBindTexture(GL_TEXTURE_2D, mTexture2D);
    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB8_SNORM, 1, 1, 0, GL_RGB, GL_BYTE, nullptr);
    EXPECT_GL_NO_ERROR();

    drawQuad(mProgram, "position", 0.5f);

    EXPECT_PIXEL_ALPHA_EQ(0, 0, 255);
}

// When sampling a texture without an alpha channel, "1" is returned as the alpha value.
// ES 3.0.4 table 3.24
TEST_P(Texture2DTestES3, TextureRGB9E5ImplicitAlpha1)
{
    glActiveTexture(GL_TEXTURE0);
    glBindTexture(GL_TEXTURE_2D, mTexture2D);
    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB9_E5, 1, 1, 0, GL_RGB, GL_UNSIGNED_INT_5_9_9_9_REV,
                 nullptr);
    EXPECT_GL_NO_ERROR();

    drawQuad(mProgram, "position", 0.5f);

    EXPECT_PIXEL_ALPHA_EQ(0, 0, 255);
}

// When sampling a texture without an alpha channel, "1" is returned as the alpha value.
// ES 3.0.4 table 3.24
TEST_P(Texture2DTestES3, TextureCOMPRESSEDRGB8ETC2ImplicitAlpha1)
{
    // ETC texture formats are not supported on Mac OpenGL. http://anglebug.com/3853
    ANGLE_SKIP_TEST_IF(IsOSX() && IsDesktopOpenGL());

    glActiveTexture(GL_TEXTURE0);
    glBindTexture(GL_TEXTURE_2D, mTexture2D);
    glCompressedTexImage2D(GL_TEXTURE_2D, 0, GL_COMPRESSED_RGB8_ETC2, 1, 1, 0, 8, nullptr);
    EXPECT_GL_NO_ERROR();

    drawQuad(mProgram, "position", 0.5f);

    EXPECT_PIXEL_ALPHA_EQ(0, 0, 255);
}

// When sampling a texture without an alpha channel, "1" is returned as the alpha value.
// ES 3.0.4 table 3.24
TEST_P(Texture2DTestES3, TextureCOMPRESSEDSRGB8ETC2ImplicitAlpha1)
{
    // ETC texture formats are not supported on Mac OpenGL. http://anglebug.com/3853
    ANGLE_SKIP_TEST_IF(IsOSX() && IsDesktopOpenGL());

    glActiveTexture(GL_TEXTURE0);
    glBindTexture(GL_TEXTURE_2D, mTexture2D);
    glCompressedTexImage2D(GL_TEXTURE_2D, 0, GL_COMPRESSED_SRGB8_ETC2, 1, 1, 0, 8, nullptr);
    EXPECT_GL_NO_ERROR();

    drawQuad(mProgram, "position", 0.5f);

    EXPECT_PIXEL_ALPHA_EQ(0, 0, 255);
}

// Use a sampler in a uniform struct.
TEST_P(SamplerInStructTest, SamplerInStruct)
{
    runSamplerInStructTest();
}

// Use a sampler in a uniform struct that's passed as a function parameter.
TEST_P(SamplerInStructAsFunctionParameterTest, SamplerInStructAsFunctionParameter)
{
    // Fails on Nexus 5X due to a driver bug. http://anglebug.com/1427
    ANGLE_SKIP_TEST_IF((IsNexus5X() || IsNexus6P()) && IsOpenGLES());

    runSamplerInStructTest();
}

// Use a sampler in a uniform struct array with a struct from the array passed as a function
// parameter.
TEST_P(SamplerInStructArrayAsFunctionParameterTest, SamplerInStructArrayAsFunctionParameter)
{
    // Fails on Nexus 5X due to a driver bug. http://anglebug.com/1427
    ANGLE_SKIP_TEST_IF((IsNexus5X() || IsNexus6P()) && IsOpenGLES());

    runSamplerInStructTest();
}

// Use a sampler in a struct inside a uniform struct with the nested struct passed as a function
// parameter.
TEST_P(SamplerInNestedStructAsFunctionParameterTest, SamplerInNestedStructAsFunctionParameter)
{
    // Fails on Nexus 5X due to a driver bug. http://anglebug.com/1427
    ANGLE_SKIP_TEST_IF((IsNexus5X() || IsNexus6P()) && IsOpenGLES());

    runSamplerInStructTest();
}

// Make sure that there isn't a name conflict between sampler extracted from a struct and a
// similarly named uniform.
TEST_P(SamplerInStructAndOtherVariableTest, SamplerInStructAndOtherVariable)
{
    runSamplerInStructTest();
}

// GL_EXT_texture_filter_anisotropic
class TextureAnisotropyTest : public Texture2DTest
{
  protected:
    void uploadTexture()
    {
        glActiveTexture(GL_TEXTURE0);
        glBindTexture(GL_TEXTURE_2D, mTexture2D);
        GLColor texDataRed[1] = {GLColor::red};
        glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 1, 1, 0, GL_RGBA, GL_UNSIGNED_BYTE, texDataRed);
        EXPECT_GL_NO_ERROR();
    }
};

// Tests that setting anisotropic filtering doesn't cause failures at draw time.
TEST_P(TextureAnisotropyTest, AnisotropyFunctional)
{
    ANGLE_SKIP_TEST_IF(!IsGLExtensionEnabled("GL_EXT_texture_filter_anisotropic"));

    setUpProgram();

    uploadTexture();

    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
    glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAX_ANISOTROPY_EXT, 2.0f);
    EXPECT_GL_NO_ERROR();

    drawQuad(mProgram, "position", 0.5f);

    EXPECT_PIXEL_COLOR_EQ(getWindowWidth() / 2, getWindowHeight() / 2, GLColor::red);
    EXPECT_PIXEL_COLOR_EQ(0, 0, GLColor::red);
    EXPECT_PIXEL_COLOR_EQ(getWindowWidth() - 1, getWindowHeight() - 1, GLColor::red);
}

// GL_OES_texture_border_clamp
class TextureBorderClampTest : public Texture2DTest
{
  protected:
    TextureBorderClampTest() : Texture2DTest() {}

    const char *getVertexShaderSource() override
    {
        return
            R"(precision highp float;
            attribute vec4 position;
            varying vec2 texcoord;

            void main()
            {
                gl_Position = vec4(position.xy, 0.0, 1.0);
                // texcoords in [-0.5, 1.5]
                texcoord = (position.xy) + 0.5;
            })";
    }

    void uploadTexture()
    {
        glActiveTexture(GL_TEXTURE0);
        glBindTexture(GL_TEXTURE_2D, mTexture2D);
        std::vector<GLColor> texDataRed(1, GLColor::red);
        glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 1, 1, 0, GL_RGBA, GL_UNSIGNED_BYTE,
                     texDataRed.data());
        EXPECT_GL_NO_ERROR();
    }
};

// Test if the color set as GL_TEXTURE_BORDER_COLOR is used when sampling outside of the texture in
// GL_CLAMP_TO_BORDER wrap mode (set with glTexParameter).
TEST_P(TextureBorderClampTest, TextureBorderClampFunctional)
{
    ANGLE_SKIP_TEST_IF(!IsGLExtensionEnabled("GL_OES_texture_border_clamp"));

    setUpProgram();

    uploadTexture();

    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_BORDER);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_BORDER);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
    glTexParameterfv(GL_TEXTURE_2D, GL_TEXTURE_BORDER_COLOR, &kFloatGreen.R);
    EXPECT_GL_NO_ERROR();

    drawQuad(mProgram, "position", 0.5f);

    EXPECT_PIXEL_COLOR_EQ(getWindowWidth() / 2, getWindowHeight() / 2, GLColor::red);
    EXPECT_PIXEL_COLOR_EQ(0, 0, GLColor::green);
    EXPECT_PIXEL_COLOR_EQ(getWindowWidth() - 1, getWindowHeight() - 1, GLColor::green);
}

// Test reading back GL_TEXTURE_BORDER_COLOR by glGetTexParameter.
TEST_P(TextureBorderClampTest, TextureBorderClampFunctional2)
{
    ANGLE_SKIP_TEST_IF(!IsGLExtensionEnabled("GL_OES_texture_border_clamp"));

    glActiveTexture(GL_TEXTURE0);
    glBindTexture(GL_TEXTURE_2D, mTexture2D);

    glTexParameterfv(GL_TEXTURE_2D, GL_TEXTURE_BORDER_COLOR, &kFloatGreen.R);

    GLint colorFixedPoint[4] = {0};
    glGetTexParameteriv(GL_TEXTURE_2D, GL_TEXTURE_BORDER_COLOR, colorFixedPoint);
    constexpr GLint colorGreenFixedPoint[4] = {0, std::numeric_limits<GLint>::max(), 0,
                                               std::numeric_limits<GLint>::max()};
    EXPECT_EQ(colorFixedPoint[0], colorGreenFixedPoint[0]);
    EXPECT_EQ(colorFixedPoint[1], colorGreenFixedPoint[1]);
    EXPECT_EQ(colorFixedPoint[2], colorGreenFixedPoint[2]);
    EXPECT_EQ(colorFixedPoint[3], colorGreenFixedPoint[3]);

    constexpr GLint colorBlueFixedPoint[4] = {0, 0, std::numeric_limits<GLint>::max(),
                                              std::numeric_limits<GLint>::max()};
    glTexParameteriv(GL_TEXTURE_2D, GL_TEXTURE_BORDER_COLOR, colorBlueFixedPoint);

    GLfloat color[4] = {0.0f};
    glGetTexParameterfv(GL_TEXTURE_2D, GL_TEXTURE_BORDER_COLOR, color);
    EXPECT_EQ(color[0], kFloatBlue.R);
    EXPECT_EQ(color[1], kFloatBlue.G);
    EXPECT_EQ(color[2], kFloatBlue.B);
    EXPECT_EQ(color[3], kFloatBlue.A);
}

// Test GL_TEXTURE_BORDER_COLOR parameter validation at glTexParameter.
TEST_P(TextureBorderClampTest, TextureBorderClampValidation)
{
    ANGLE_SKIP_TEST_IF(!IsGLExtensionEnabled("GL_OES_texture_border_clamp"));

    glActiveTexture(GL_TEXTURE0);
    glBindTexture(GL_TEXTURE_2D, mTexture2D);

    glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_BORDER_COLOR, 1.0f);
    EXPECT_GL_ERROR(GL_INVALID_ENUM);

    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_BORDER_COLOR, std::numeric_limits<GLint>::max());
    EXPECT_GL_ERROR(GL_INVALID_ENUM);

    glTexParameterfv(GL_TEXTURE_2D_MULTISAMPLE, GL_TEXTURE_BORDER_COLOR, &kFloatGreen.R);
    EXPECT_GL_ERROR(GL_INVALID_ENUM);

    GLint colorInt[4] = {0};
    glTexParameteriv(GL_TEXTURE_2D_MULTISAMPLE_ARRAY, GL_TEXTURE_BORDER_COLOR, colorInt);
    EXPECT_GL_ERROR(GL_INVALID_ENUM);

    if (getClientMajorVersion() < 3)
    {
        glTexParameterIivOES(GL_TEXTURE_2D, GL_TEXTURE_BORDER_COLOR, colorInt);
        EXPECT_GL_ERROR(GL_INVALID_OPERATION);
        glGetTexParameterIivOES(GL_TEXTURE_2D, GL_TEXTURE_BORDER_COLOR, colorInt);
        EXPECT_GL_ERROR(GL_INVALID_OPERATION);

        GLuint colorUInt[4] = {0};
        glTexParameterIuivOES(GL_TEXTURE_2D, GL_TEXTURE_BORDER_COLOR, colorUInt);
        EXPECT_GL_ERROR(GL_INVALID_OPERATION);
        glGetTexParameterIuivOES(GL_TEXTURE_2D, GL_TEXTURE_BORDER_COLOR, colorUInt);
        EXPECT_GL_ERROR(GL_INVALID_OPERATION);

        GLSampler sampler;
        glSamplerParameterIivOES(sampler, GL_TEXTURE_BORDER_COLOR, colorInt);
        EXPECT_GL_ERROR(GL_INVALID_OPERATION);
        glGetSamplerParameterIivOES(sampler, GL_TEXTURE_BORDER_COLOR, colorInt);
        EXPECT_GL_ERROR(GL_INVALID_OPERATION);

        glSamplerParameterIuivOES(sampler, GL_TEXTURE_BORDER_COLOR, colorUInt);
        EXPECT_GL_ERROR(GL_INVALID_OPERATION);
        glGetSamplerParameterIuivOES(sampler, GL_TEXTURE_BORDER_COLOR, colorUInt);
        EXPECT_GL_ERROR(GL_INVALID_OPERATION);
    }
}

class TextureBorderClampTestES3 : public TextureBorderClampTest
{
  protected:
    TextureBorderClampTestES3() : TextureBorderClampTest() {}
};

// Test if the color set as GL_TEXTURE_BORDER_COLOR is used when sampling outside of the texture in
// GL_CLAMP_TO_BORDER wrap mode (set with glSamplerParameter).
TEST_P(TextureBorderClampTestES3, TextureBorderClampES3Functional)
{
    ANGLE_SKIP_TEST_IF(!IsGLExtensionEnabled("GL_OES_texture_border_clamp"));

    setUpProgram();

    uploadTexture();

    GLSampler sampler;
    glBindSampler(0, sampler);
    glSamplerParameteri(sampler, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_BORDER);
    glSamplerParameteri(sampler, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_BORDER);
    glSamplerParameteri(sampler, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
    glSamplerParameteri(sampler, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
    glSamplerParameterfv(sampler, GL_TEXTURE_BORDER_COLOR, &kFloatGreen.R);
    EXPECT_GL_NO_ERROR();

    drawQuad(mProgram, "position", 0.5f);

    EXPECT_PIXEL_COLOR_EQ(getWindowWidth() / 2, getWindowHeight() / 2, GLColor::red);
    EXPECT_PIXEL_COLOR_EQ(0, 0, GLColor::green);
    EXPECT_PIXEL_COLOR_EQ(getWindowWidth() - 1, getWindowHeight() - 1, GLColor::green);
}

// Test reading back GL_TEXTURE_BORDER_COLOR by glGetSamplerParameter.
TEST_P(TextureBorderClampTestES3, TextureBorderClampES3Functional2)
{
    ANGLE_SKIP_TEST_IF(!IsGLExtensionEnabled("GL_OES_texture_border_clamp"));

    glActiveTexture(GL_TEXTURE0);

    GLSampler sampler;
    glBindSampler(0, sampler);

    glSamplerParameterfv(sampler, GL_TEXTURE_BORDER_COLOR, &kFloatGreen.R);

    GLint colorFixedPoint[4] = {0};
    glGetSamplerParameteriv(sampler, GL_TEXTURE_BORDER_COLOR, colorFixedPoint);
    constexpr GLint colorGreenFixedPoint[4] = {0, std::numeric_limits<GLint>::max(), 0,
                                               std::numeric_limits<GLint>::max()};
    EXPECT_EQ(colorFixedPoint[0], colorGreenFixedPoint[0]);
    EXPECT_EQ(colorFixedPoint[1], colorGreenFixedPoint[1]);
    EXPECT_EQ(colorFixedPoint[2], colorGreenFixedPoint[2]);
    EXPECT_EQ(colorFixedPoint[3], colorGreenFixedPoint[3]);

    constexpr GLint colorBlueFixedPoint[4] = {0, 0, std::numeric_limits<GLint>::max(),
                                              std::numeric_limits<GLint>::max()};
    glSamplerParameteriv(sampler, GL_TEXTURE_BORDER_COLOR, colorBlueFixedPoint);

    GLfloat color[4] = {0.0f};
    glGetSamplerParameterfv(sampler, GL_TEXTURE_BORDER_COLOR, color);
    EXPECT_EQ(color[0], kFloatBlue.R);
    EXPECT_EQ(color[1], kFloatBlue.G);
    EXPECT_EQ(color[2], kFloatBlue.B);
    EXPECT_EQ(color[3], kFloatBlue.A);

    constexpr GLint colorSomewhatRedInt[4] = {500000, 0, 0, std::numeric_limits<GLint>::max()};
    glSamplerParameterIivOES(sampler, GL_TEXTURE_BORDER_COLOR, colorSomewhatRedInt);
    GLint colorInt[4] = {0};
    glGetSamplerParameterIivOES(sampler, GL_TEXTURE_BORDER_COLOR, colorInt);
    EXPECT_EQ(colorInt[0], colorSomewhatRedInt[0]);
    EXPECT_EQ(colorInt[1], colorSomewhatRedInt[1]);
    EXPECT_EQ(colorInt[2], colorSomewhatRedInt[2]);
    EXPECT_EQ(colorInt[3], colorSomewhatRedInt[3]);

    constexpr GLuint colorSomewhatRedUInt[4] = {500000, 0, 0, std::numeric_limits<GLuint>::max()};
    glSamplerParameterIuivOES(sampler, GL_TEXTURE_BORDER_COLOR, colorSomewhatRedUInt);
    GLuint colorUInt[4] = {0};
    glGetSamplerParameterIuivOES(sampler, GL_TEXTURE_BORDER_COLOR, colorUInt);
    EXPECT_EQ(colorUInt[0], colorSomewhatRedUInt[0]);
    EXPECT_EQ(colorUInt[1], colorSomewhatRedUInt[1]);
    EXPECT_EQ(colorUInt[2], colorSomewhatRedUInt[2]);
    EXPECT_EQ(colorUInt[3], colorSomewhatRedUInt[3]);

    glBindTexture(GL_TEXTURE_2D, mTexture2D);

    constexpr GLint colorSomewhatGreenInt[4] = {0, 500000, 0, std::numeric_limits<GLint>::max()};
    glTexParameterIivOES(GL_TEXTURE_2D, GL_TEXTURE_BORDER_COLOR, colorSomewhatGreenInt);
    glGetTexParameterIivOES(GL_TEXTURE_2D, GL_TEXTURE_BORDER_COLOR, colorInt);
    EXPECT_EQ(colorInt[0], colorSomewhatGreenInt[0]);
    EXPECT_EQ(colorInt[1], colorSomewhatGreenInt[1]);
    EXPECT_EQ(colorInt[2], colorSomewhatGreenInt[2]);
    EXPECT_EQ(colorInt[3], colorSomewhatGreenInt[3]);

    constexpr GLuint colorSomewhatGreenUInt[4] = {0, 500000, 0, std::numeric_limits<GLuint>::max()};
    glTexParameterIuivOES(GL_TEXTURE_2D, GL_TEXTURE_BORDER_COLOR, colorSomewhatGreenUInt);
    glGetTexParameterIuivOES(GL_TEXTURE_2D, GL_TEXTURE_BORDER_COLOR, colorUInt);
    EXPECT_EQ(colorUInt[0], colorSomewhatGreenUInt[0]);
    EXPECT_EQ(colorUInt[1], colorSomewhatGreenUInt[1]);
    EXPECT_EQ(colorUInt[2], colorSomewhatGreenUInt[2]);
    EXPECT_EQ(colorUInt[3], colorSomewhatGreenUInt[3]);
}

// Test GL_TEXTURE_BORDER_COLOR parameter validation at glSamplerParameter.
TEST_P(TextureBorderClampTestES3, TextureBorderClampES3Validation)
{
    ANGLE_SKIP_TEST_IF(!IsGLExtensionEnabled("GL_OES_texture_border_clamp"));

    glActiveTexture(GL_TEXTURE0);

    GLSampler sampler;
    glBindSampler(0, sampler);

    glSamplerParameterf(sampler, GL_TEXTURE_BORDER_COLOR, 1.0f);
    EXPECT_GL_ERROR(GL_INVALID_ENUM);

    glSamplerParameteri(sampler, GL_TEXTURE_BORDER_COLOR, std::numeric_limits<GLint>::max());
    EXPECT_GL_ERROR(GL_INVALID_ENUM);
}

class TextureBorderClampIntegerTestES3 : public Texture2DTest
{
  protected:
    TextureBorderClampIntegerTestES3() : Texture2DTest(), isUnsignedIntTest(false) {}

    const char *getVertexShaderSource() override
    {
        return
            R"(#version 300 es
            out vec2 texcoord;
            in vec4 position;

            void main()
            {
                gl_Position = vec4(position.xy, 0.0, 1.0);
                // texcoords in [-0.5, 1.5]
                texcoord = (position.xy) + 0.5;
            })";
    }

    const char *getFragmentShaderSource() override
    {
        if (isUnsignedIntTest)
        {
            return "#version 300 es\n"
                   "precision highp float;\n"
                   "uniform highp usampler2D tex;\n"
                   "in vec2 texcoord;\n"
                   "out vec4 fragColor;\n"

                   "void main()\n"
                   "{\n"
                   "vec4 red   = vec4(1.0, 0.0, 0.0, 1.0);\n"
                   "vec4 green = vec4(0.0, 1.0, 0.0, 1.0);\n"
                   "fragColor = (texture(tex, texcoord).r == 150u)"
                   "            ? green : red;\n"
                   "}\n";
        }
        else
        {
            return "#version 300 es\n"
                   "precision highp float;\n"
                   "uniform highp isampler2D tex;\n"
                   "in vec2 texcoord;\n"
                   "out vec4 fragColor;\n"

                   "void main()\n"
                   "{\n"
                   "vec4 red   = vec4(1.0, 0.0, 0.0, 1.0);\n"
                   "vec4 green = vec4(0.0, 1.0, 0.0, 1.0);\n"
                   "fragColor = (texture(tex, texcoord).r == -50)"
                   "            ? green : red;\n"
                   "}\n";
        }
    }

    void uploadTexture()
    {
        glActiveTexture(GL_TEXTURE0);
        glBindTexture(GL_TEXTURE_2D, mTexture2D);
        if (isUnsignedIntTest)
        {
            std::vector<GLubyte> texData(4, 100);
            glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8UI, 1, 1, 0, GL_RGBA_INTEGER, GL_UNSIGNED_BYTE,
                         texData.data());
        }
        else
        {
            std::vector<GLbyte> texData(4, 100);
            glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8I, 1, 1, 0, GL_RGBA_INTEGER, GL_BYTE,
                         texData.data());
        }
        EXPECT_GL_NO_ERROR();
    }

    bool isUnsignedIntTest;
};

// Test if the integer values set as GL_TEXTURE_BORDER_COLOR is used when sampling outside of the
// integer texture in GL_CLAMP_TO_BORDER wrap mode (set with glTexParameterIivOES).
TEST_P(TextureBorderClampIntegerTestES3, TextureBorderClampInteger)
{
    // Fails on Win10 FYI x64 Release (AMD RX 550). http://anglebug.com/3760
    ANGLE_SKIP_TEST_IF(IsWindows() && IsAMD() && IsDesktopOpenGL());

    ANGLE_SKIP_TEST_IF(!IsGLExtensionEnabled("GL_OES_texture_border_clamp"));

    setUpProgram();

    uploadTexture();

    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_BORDER);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_BORDER);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);

    constexpr GLint borderColor[4] = {-50, -50, -50, -50};
    glTexParameterIivOES(GL_TEXTURE_2D, GL_TEXTURE_BORDER_COLOR, borderColor);

    EXPECT_GL_NO_ERROR();

    drawQuad(mProgram, "position", 0.5f);

    EXPECT_PIXEL_COLOR_EQ(getWindowWidth() / 2, getWindowHeight() / 2, GLColor::red);
    EXPECT_PIXEL_COLOR_EQ(0, 0, GLColor::green);
    EXPECT_PIXEL_COLOR_EQ(getWindowWidth() - 1, getWindowHeight() - 1, GLColor::green);
}

// Test if the integer values set as GL_TEXTURE_BORDER_COLOR is used when sampling outside of the
// integer texture in GL_CLAMP_TO_BORDER wrap mode (set with glTexParameterIivOES).
TEST_P(TextureBorderClampIntegerTestES3, TextureBorderClampInteger2)
{
    // Fails on Win10 FYI x64 Release (AMD RX 550). http://anglebug.com/3760
    ANGLE_SKIP_TEST_IF(IsWindows() && IsAMD() && IsDesktopOpenGL());

    ANGLE_SKIP_TEST_IF(!IsGLExtensionEnabled("GL_OES_texture_border_clamp"));

    setUpProgram();

    uploadTexture();

    GLSampler sampler;
    glBindSampler(0, sampler);
    glSamplerParameteri(sampler, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_BORDER);
    glSamplerParameteri(sampler, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_BORDER);
    glSamplerParameteri(sampler, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
    glSamplerParameteri(sampler, GL_TEXTURE_MIN_FILTER, GL_NEAREST);

    constexpr GLint borderColor[4] = {-50, -50, -50, -50};
    glSamplerParameterIivOES(sampler, GL_TEXTURE_BORDER_COLOR, borderColor);

    EXPECT_GL_NO_ERROR();

    drawQuad(mProgram, "position", 0.5f);

    EXPECT_PIXEL_COLOR_EQ(getWindowWidth() / 2, getWindowHeight() / 2, GLColor::red);
    EXPECT_PIXEL_COLOR_EQ(0, 0, GLColor::green);
    EXPECT_PIXEL_COLOR_EQ(getWindowWidth() - 1, getWindowHeight() - 1, GLColor::green);
}

// Test if the unsigned integer values set as GL_TEXTURE_BORDER_COLOR is used when sampling outside
// of the unsigned integer texture in GL_CLAMP_TO_BORDER wrap mode (set with glTexParameterIuivOES).
TEST_P(TextureBorderClampIntegerTestES3, TextureBorderClampIntegerUnsigned)
{
    ANGLE_SKIP_TEST_IF(!IsGLExtensionEnabled("GL_OES_texture_border_clamp"));

    isUnsignedIntTest = true;

    setUpProgram();

    uploadTexture();

    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_BORDER);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_BORDER);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);

    constexpr GLuint borderColor[4] = {150, 150, 150, 150};
    glTexParameterIuivOES(GL_TEXTURE_2D, GL_TEXTURE_BORDER_COLOR, borderColor);

    EXPECT_GL_NO_ERROR();

    drawQuad(mProgram, "position", 0.5f);

    EXPECT_PIXEL_COLOR_EQ(getWindowWidth() / 2, getWindowHeight() / 2, GLColor::red);
    EXPECT_PIXEL_COLOR_EQ(0, 0, GLColor::green);
    EXPECT_PIXEL_COLOR_EQ(getWindowWidth() - 1, getWindowHeight() - 1, GLColor::green);
}

// Test if the unsigned integer values set as GL_TEXTURE_BORDER_COLOR is used when sampling outside
// of the unsigned integer texture in GL_CLAMP_TO_BORDER wrap mode (set with
// glSamplerParameterIuivOES).
TEST_P(TextureBorderClampIntegerTestES3, TextureBorderClampIntegerUnsigned2)
{
    ANGLE_SKIP_TEST_IF(!IsGLExtensionEnabled("GL_OES_texture_border_clamp"));

    isUnsignedIntTest = true;

    setUpProgram();

    uploadTexture();

    GLSampler sampler;
    glBindSampler(0, sampler);
    glSamplerParameteri(sampler, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_BORDER);
    glSamplerParameteri(sampler, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_BORDER);
    glSamplerParameteri(sampler, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
    glSamplerParameteri(sampler, GL_TEXTURE_MIN_FILTER, GL_NEAREST);

    constexpr GLuint borderColor[4] = {150, 150, 150, 150};
    glSamplerParameterIuivOES(sampler, GL_TEXTURE_BORDER_COLOR, borderColor);

    EXPECT_GL_NO_ERROR();

    drawQuad(mProgram, "position", 0.5f);

    EXPECT_PIXEL_COLOR_EQ(getWindowWidth() / 2, getWindowHeight() / 2, GLColor::red);
    EXPECT_PIXEL_COLOR_EQ(0, 0, GLColor::green);
    EXPECT_PIXEL_COLOR_EQ(getWindowWidth() - 1, getWindowHeight() - 1, GLColor::green);
}

// ~GL_OES_texture_border_clamp

class TextureLimitsTest : public ANGLETest
{
  protected:
    struct RGBA8
    {
        uint8_t R, G, B, A;
    };

    TextureLimitsTest()
        : mProgram(0), mMaxVertexTextures(0), mMaxFragmentTextures(0), mMaxCombinedTextures(0)
    {
        setWindowWidth(128);
        setWindowHeight(128);
        setConfigRedBits(8);
        setConfigGreenBits(8);
        setConfigBlueBits(8);
        setConfigAlphaBits(8);
    }

    void testSetUp() override
    {
        glGetIntegerv(GL_MAX_VERTEX_TEXTURE_IMAGE_UNITS, &mMaxVertexTextures);
        glGetIntegerv(GL_MAX_TEXTURE_IMAGE_UNITS, &mMaxFragmentTextures);
        glGetIntegerv(GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS, &mMaxCombinedTextures);

        ASSERT_GL_NO_ERROR();
    }

    void testTearDown() override
    {
        if (mProgram != 0)
        {
            glDeleteProgram(mProgram);
            mProgram = 0;

            if (!mTextures.empty())
            {
                glDeleteTextures(static_cast<GLsizei>(mTextures.size()), &mTextures[0]);
            }
        }
    }

    void compileProgramWithTextureCounts(const std::string &vertexPrefix,
                                         GLint vertexTextureCount,
                                         GLint vertexActiveTextureCount,
                                         const std::string &fragPrefix,
                                         GLint fragmentTextureCount,
                                         GLint fragmentActiveTextureCount)
    {
        std::stringstream vertexShaderStr;
        vertexShaderStr << "attribute vec2 position;\n"
                        << "varying vec4 color;\n"
                        << "varying vec2 texCoord;\n";

        for (GLint textureIndex = 0; textureIndex < vertexTextureCount; ++textureIndex)
        {
            vertexShaderStr << "uniform sampler2D " << vertexPrefix << textureIndex << ";\n";
        }

        vertexShaderStr << "void main() {\n"
                        << "  gl_Position = vec4(position, 0, 1);\n"
                        << "  texCoord = (position * 0.5) + 0.5;\n"
                        << "  color = vec4(0);\n";

        for (GLint textureIndex = 0; textureIndex < vertexActiveTextureCount; ++textureIndex)
        {
            vertexShaderStr << "  color += texture2D(" << vertexPrefix << textureIndex
                            << ", texCoord);\n";
        }

        vertexShaderStr << "}";

        std::stringstream fragmentShaderStr;
        fragmentShaderStr << "varying mediump vec4 color;\n"
                          << "varying mediump vec2 texCoord;\n";

        for (GLint textureIndex = 0; textureIndex < fragmentTextureCount; ++textureIndex)
        {
            fragmentShaderStr << "uniform sampler2D " << fragPrefix << textureIndex << ";\n";
        }

        fragmentShaderStr << "void main() {\n"
                          << "  gl_FragColor = color;\n";

        for (GLint textureIndex = 0; textureIndex < fragmentActiveTextureCount; ++textureIndex)
        {
            fragmentShaderStr << "  gl_FragColor += texture2D(" << fragPrefix << textureIndex
                              << ", texCoord);\n";
        }

        fragmentShaderStr << "}";

        const std::string &vertexShaderSource   = vertexShaderStr.str();
        const std::string &fragmentShaderSource = fragmentShaderStr.str();

        mProgram = CompileProgram(vertexShaderSource.c_str(), fragmentShaderSource.c_str());
    }

    RGBA8 getPixel(GLint texIndex)
    {
        RGBA8 pixel = {static_cast<uint8_t>(texIndex & 0x7u), static_cast<uint8_t>(texIndex >> 3),
                       0, 255u};
        return pixel;
    }

    void initTextures(GLint tex2DCount, GLint texCubeCount)
    {
        GLint totalCount = tex2DCount + texCubeCount;
        mTextures.assign(totalCount, 0);
        glGenTextures(totalCount, &mTextures[0]);
        ASSERT_GL_NO_ERROR();

        std::vector<RGBA8> texData(16 * 16);

        GLint texIndex = 0;
        for (; texIndex < tex2DCount; ++texIndex)
        {
            texData.assign(texData.size(), getPixel(texIndex));
            glActiveTexture(GL_TEXTURE0 + texIndex);
            glBindTexture(GL_TEXTURE_2D, mTextures[texIndex]);
            glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 16, 16, 0, GL_RGBA, GL_UNSIGNED_BYTE,
                         &texData[0]);
            glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
            glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
            glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
            glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
        }

        ASSERT_GL_NO_ERROR();

        for (; texIndex < texCubeCount; ++texIndex)
        {
            texData.assign(texData.size(), getPixel(texIndex));
            glActiveTexture(GL_TEXTURE0 + texIndex);
            glBindTexture(GL_TEXTURE_CUBE_MAP, mTextures[texIndex]);
            glTexImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_X, 0, GL_RGBA, 16, 16, 0, GL_RGBA,
                         GL_UNSIGNED_BYTE, &texData[0]);
            glTexImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_Y, 0, GL_RGBA, 16, 16, 0, GL_RGBA,
                         GL_UNSIGNED_BYTE, &texData[0]);
            glTexImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_Z, 0, GL_RGBA, 16, 16, 0, GL_RGBA,
                         GL_UNSIGNED_BYTE, &texData[0]);
            glTexImage2D(GL_TEXTURE_CUBE_MAP_NEGATIVE_X, 0, GL_RGBA, 16, 16, 0, GL_RGBA,
                         GL_UNSIGNED_BYTE, &texData[0]);
            glTexImage2D(GL_TEXTURE_CUBE_MAP_NEGATIVE_Y, 0, GL_RGBA, 16, 16, 0, GL_RGBA,
                         GL_UNSIGNED_BYTE, &texData[0]);
            glTexImage2D(GL_TEXTURE_CUBE_MAP_NEGATIVE_Z, 0, GL_RGBA, 16, 16, 0, GL_RGBA,
                         GL_UNSIGNED_BYTE, &texData[0]);
            glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
            glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
            glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
            glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
        }

        ASSERT_GL_NO_ERROR();
    }

    void testWithTextures(GLint vertexTextureCount,
                          const std::string &vertexTexturePrefix,
                          GLint fragmentTextureCount,
                          const std::string &fragmentTexturePrefix)
    {
        // Generate textures
        initTextures(vertexTextureCount + fragmentTextureCount, 0);

        glUseProgram(mProgram);
        RGBA8 expectedSum = {0};
        for (GLint texIndex = 0; texIndex < vertexTextureCount; ++texIndex)
        {
            std::stringstream uniformNameStr;
            uniformNameStr << vertexTexturePrefix << texIndex;
            const std::string &uniformName = uniformNameStr.str();
            GLint location                 = glGetUniformLocation(mProgram, uniformName.c_str());
            ASSERT_NE(-1, location);

            glUniform1i(location, texIndex);
            RGBA8 contribution = getPixel(texIndex);
            expectedSum.R += contribution.R;
            expectedSum.G += contribution.G;
        }

        for (GLint texIndex = 0; texIndex < fragmentTextureCount; ++texIndex)
        {
            std::stringstream uniformNameStr;
            uniformNameStr << fragmentTexturePrefix << texIndex;
            const std::string &uniformName = uniformNameStr.str();
            GLint location                 = glGetUniformLocation(mProgram, uniformName.c_str());
            ASSERT_NE(-1, location);

            glUniform1i(location, texIndex + vertexTextureCount);
            RGBA8 contribution = getPixel(texIndex + vertexTextureCount);
            expectedSum.R += contribution.R;
            expectedSum.G += contribution.G;
        }

        ASSERT_GE(256u, expectedSum.G);

        drawQuad(mProgram, "position", 0.5f);
        ASSERT_GL_NO_ERROR();
        EXPECT_PIXEL_EQ(0, 0, expectedSum.R, expectedSum.G, 0, 255);
    }

    GLuint mProgram;
    std::vector<GLuint> mTextures;
    GLint mMaxVertexTextures;
    GLint mMaxFragmentTextures;
    GLint mMaxCombinedTextures;
};

// Test rendering with the maximum vertex texture units.
TEST_P(TextureLimitsTest, MaxVertexTextures)
{
    compileProgramWithTextureCounts("tex", mMaxVertexTextures, mMaxVertexTextures, "tex", 0, 0);
    ASSERT_NE(0u, mProgram);
    ASSERT_GL_NO_ERROR();

    testWithTextures(mMaxVertexTextures, "tex", 0, "tex");
}

// Test rendering with the maximum fragment texture units.
TEST_P(TextureLimitsTest, MaxFragmentTextures)
{
    compileProgramWithTextureCounts("tex", 0, 0, "tex", mMaxFragmentTextures, mMaxFragmentTextures);
    ASSERT_NE(0u, mProgram);
    ASSERT_GL_NO_ERROR();

    testWithTextures(mMaxFragmentTextures, "tex", 0, "tex");
}

// Test rendering with maximum combined texture units.
TEST_P(TextureLimitsTest, MaxCombinedTextures)
{
    GLint vertexTextures = mMaxVertexTextures;

    if (vertexTextures + mMaxFragmentTextures > mMaxCombinedTextures)
    {
        vertexTextures = mMaxCombinedTextures - mMaxFragmentTextures;
    }

    compileProgramWithTextureCounts("vtex", vertexTextures, vertexTextures, "ftex",
                                    mMaxFragmentTextures, mMaxFragmentTextures);
    ASSERT_NE(0u, mProgram);
    ASSERT_GL_NO_ERROR();

    testWithTextures(vertexTextures, "vtex", mMaxFragmentTextures, "ftex");
}

// Negative test for exceeding the number of vertex textures
TEST_P(TextureLimitsTest, ExcessiveVertexTextures)
{
    compileProgramWithTextureCounts("tex", mMaxVertexTextures + 1, mMaxVertexTextures + 1, "tex", 0,
                                    0);
    ASSERT_EQ(0u, mProgram);
}

// Negative test for exceeding the number of fragment textures
TEST_P(TextureLimitsTest, ExcessiveFragmentTextures)
{
    compileProgramWithTextureCounts("tex", 0, 0, "tex", mMaxFragmentTextures + 1,
                                    mMaxFragmentTextures + 1);
    ASSERT_EQ(0u, mProgram);
}

// Test active vertex textures under the limit, but excessive textures specified.
TEST_P(TextureLimitsTest, MaxActiveVertexTextures)
{
    compileProgramWithTextureCounts("tex", mMaxVertexTextures + 4, mMaxVertexTextures, "tex", 0, 0);
    ASSERT_NE(0u, mProgram);
    ASSERT_GL_NO_ERROR();

    testWithTextures(mMaxVertexTextures, "tex", 0, "tex");
}

// Test active fragment textures under the limit, but excessive textures specified.
TEST_P(TextureLimitsTest, MaxActiveFragmentTextures)
{
    compileProgramWithTextureCounts("tex", 0, 0, "tex", mMaxFragmentTextures + 4,
                                    mMaxFragmentTextures);
    ASSERT_NE(0u, mProgram);
    ASSERT_GL_NO_ERROR();

    testWithTextures(0, "tex", mMaxFragmentTextures, "tex");
}

// Negative test for pointing two sampler uniforms of different types to the same texture.
// GLES 2.0.25 section 2.10.4 page 39.
TEST_P(TextureLimitsTest, TextureTypeConflict)
{
    constexpr char kVS[] =
        "attribute vec2 position;\n"
        "varying float color;\n"
        "uniform sampler2D tex2D;\n"
        "uniform samplerCube texCube;\n"
        "void main() {\n"
        "  gl_Position = vec4(position, 0, 1);\n"
        "  vec2 texCoord = (position * 0.5) + 0.5;\n"
        "  color = texture2D(tex2D, texCoord).x;\n"
        "  color += textureCube(texCube, vec3(texCoord, 0)).x;\n"
        "}";
    constexpr char kFS[] =
        "varying mediump float color;\n"
        "void main() {\n"
        "  gl_FragColor = vec4(color, 0, 0, 1);\n"
        "}";

    mProgram = CompileProgram(kVS, kFS);
    ASSERT_NE(0u, mProgram);

    initTextures(1, 0);

    glUseProgram(mProgram);
    GLint tex2DLocation = glGetUniformLocation(mProgram, "tex2D");
    ASSERT_NE(-1, tex2DLocation);
    GLint texCubeLocation = glGetUniformLocation(mProgram, "texCube");
    ASSERT_NE(-1, texCubeLocation);

    glUniform1i(tex2DLocation, 0);
    glUniform1i(texCubeLocation, 0);
    ASSERT_GL_NO_ERROR();

    drawQuad(mProgram, "position", 0.5f);
    EXPECT_GL_ERROR(GL_INVALID_OPERATION);
}

class Texture2DNorm16TestES3 : public Texture2DTestES3
{
  protected:
    Texture2DNorm16TestES3() : Texture2DTestES3(), mTextures{0, 0, 0}, mFBO(0), mRenderbuffer(0) {}

    void testSetUp() override
    {
        Texture2DTestES3::testSetUp();

        glActiveTexture(GL_TEXTURE0);
        glGenTextures(3, mTextures);
        glGenFramebuffers(1, &mFBO);
        glGenRenderbuffers(1, &mRenderbuffer);

        for (size_t textureIndex = 0; textureIndex < 3; textureIndex++)
        {
            glBindTexture(GL_TEXTURE_2D, mTextures[textureIndex]);
            glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
            glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
        }

        glBindTexture(GL_TEXTURE_2D, 0);

        ASSERT_GL_NO_ERROR();
    }

    void testTearDown() override
    {
        glDeleteTextures(3, mTextures);
        glDeleteFramebuffers(1, &mFBO);
        glDeleteRenderbuffers(1, &mRenderbuffer);

        Texture2DTestES3::testTearDown();
    }

    void testNorm16Texture(GLint internalformat, GLenum format, GLenum type)
    {
        GLushort pixelValue  = (type == GL_SHORT) ? 0x7FFF : 0x6A35;
        GLushort imageData[] = {pixelValue, pixelValue, pixelValue, pixelValue};

        setUpProgram();

        glBindFramebuffer(GL_FRAMEBUFFER, mFBO);
        glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, mTextures[0],
                               0);

        glBindTexture(GL_TEXTURE_2D, mTextures[0]);
        glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA16_EXT, 1, 1, 0, GL_RGBA, GL_UNSIGNED_SHORT, nullptr);

        glBindTexture(GL_TEXTURE_2D, mTextures[1]);
        glTexImage2D(GL_TEXTURE_2D, 0, internalformat, 1, 1, 0, format, type, imageData);

        EXPECT_GL_NO_ERROR();

        drawQuad(mProgram, "position", 0.5f);

        GLubyte expectedValue = (type == GL_SHORT) ? 0xFF : static_cast<GLubyte>(pixelValue >> 8);

        EXPECT_PIXEL_COLOR_EQ(0, 0,
                              SliceFormatColor(format, GLColor(expectedValue, expectedValue,
                                                               expectedValue, expectedValue)));

        glBindFramebuffer(GL_FRAMEBUFFER, 0);

        ASSERT_GL_NO_ERROR();
    }

    void testNorm16Render(GLint internalformat, GLenum format, GLenum type)
    {
        GLushort pixelValue  = 0x6A35;
        GLushort imageData[] = {pixelValue, pixelValue, pixelValue, pixelValue};

        setUpProgram();

        glBindTexture(GL_TEXTURE_2D, mTextures[1]);
        glTexImage2D(GL_TEXTURE_2D, 0, internalformat, 1, 1, 0, format, type, nullptr);

        glBindFramebuffer(GL_FRAMEBUFFER, mFBO);
        glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, mTextures[1],
                               0);

        glBindTexture(GL_TEXTURE_2D, mTextures[2]);
        glTexImage2D(GL_TEXTURE_2D, 0, internalformat, 1, 1, 0, format, type, imageData);

        EXPECT_GL_NO_ERROR();

        drawQuad(mProgram, "position", 0.5f);

        GLubyte expectedValue = static_cast<GLubyte>(pixelValue >> 8);
        EXPECT_PIXEL_COLOR_EQ(0, 0,
                              SliceFormatColor(format, GLColor(expectedValue, expectedValue,
                                                               expectedValue, expectedValue)));

        glBindRenderbuffer(GL_RENDERBUFFER, mRenderbuffer);
        glRenderbufferStorage(GL_RENDERBUFFER, internalformat, 1, 1);
        glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_RENDERBUFFER,
                                  mRenderbuffer);
        glBindRenderbuffer(GL_RENDERBUFFER, 0);
        EXPECT_GL_NO_ERROR();

        glClearColor(1.0f, 1.0f, 1.0f, 1.0f);
        glClear(GL_COLOR_BUFFER_BIT);

        glCopyTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, 0, 0, 1, 1);

        EXPECT_PIXEL_COLOR_EQ(0, 0, SliceFormatColor(format, GLColor::white));

        glBindFramebuffer(GL_FRAMEBUFFER, 0);

        ASSERT_GL_NO_ERROR();
    }

    GLuint mTextures[3];
    GLuint mFBO;
    GLuint mRenderbuffer;
};

// Test texture formats enabled by the GL_EXT_texture_norm16 extension.
TEST_P(Texture2DNorm16TestES3, TextureNorm16Test)
{
    ANGLE_SKIP_TEST_IF(!IsGLExtensionEnabled("GL_EXT_texture_norm16"));

    testNorm16Texture(GL_R16_EXT, GL_RED, GL_UNSIGNED_SHORT);
    testNorm16Texture(GL_RG16_EXT, GL_RG, GL_UNSIGNED_SHORT);
    testNorm16Texture(GL_RGB16_EXT, GL_RGB, GL_UNSIGNED_SHORT);
    testNorm16Texture(GL_RGBA16_EXT, GL_RGBA, GL_UNSIGNED_SHORT);
    testNorm16Texture(GL_R16_SNORM_EXT, GL_RED, GL_SHORT);
    testNorm16Texture(GL_RG16_SNORM_EXT, GL_RG, GL_SHORT);
    testNorm16Texture(GL_RGB16_SNORM_EXT, GL_RGB, GL_SHORT);
    testNorm16Texture(GL_RGBA16_SNORM_EXT, GL_RGBA, GL_SHORT);

    testNorm16Render(GL_R16_EXT, GL_RED, GL_UNSIGNED_SHORT);
    testNorm16Render(GL_RG16_EXT, GL_RG, GL_UNSIGNED_SHORT);
    testNorm16Render(GL_RGBA16_EXT, GL_RGBA, GL_UNSIGNED_SHORT);
}

class Texture2DRGTest : public Texture2DTest
{
  protected:
    Texture2DRGTest()
        : Texture2DTest(), mRenderableTexture(0), mTestTexture(0), mFBO(0), mRenderbuffer(0)
    {}

    void testSetUp() override
    {
        Texture2DTest::testSetUp();

        glActiveTexture(GL_TEXTURE0);
        glGenTextures(1, &mRenderableTexture);
        glGenTextures(1, &mTestTexture);
        glGenFramebuffers(1, &mFBO);
        glGenRenderbuffers(1, &mRenderbuffer);

        glBindTexture(GL_TEXTURE_2D, mRenderableTexture);
        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
        glBindTexture(GL_TEXTURE_2D, mTestTexture);
        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);

        glBindTexture(GL_TEXTURE_2D, 0);

        setUpProgram();
        glUseProgram(mProgram);
        glUniform1i(mTexture2DUniformLocation, 0);

        ASSERT_GL_NO_ERROR();
    }

    void testTearDown() override
    {
        glDeleteTextures(1, &mRenderableTexture);
        glDeleteTextures(1, &mTestTexture);
        glDeleteFramebuffers(1, &mFBO);
        glDeleteRenderbuffers(1, &mRenderbuffer);

        Texture2DTest::testTearDown();
    }

    void setupFormatTextures(GLenum internalformat, GLenum format, GLenum type, GLvoid *imageData)
    {
        glBindTexture(GL_TEXTURE_2D, mRenderableTexture);
        glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 1, 1, 0, GL_RGBA, GL_UNSIGNED_BYTE, nullptr);

        glBindFramebuffer(GL_FRAMEBUFFER, mFBO);
        glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D,
                               mRenderableTexture, 0);

        glBindTexture(GL_TEXTURE_2D, mTestTexture);
        glTexImage2D(GL_TEXTURE_2D, 0, internalformat, 1, 1, 0, format, type, imageData);

        EXPECT_GL_NO_ERROR();
    }

    void testRGTexture(GLColor expectedColor)
    {
        drawQuad(mProgram, "position", 0.5f);

        EXPECT_GL_NO_ERROR();
        EXPECT_PIXEL_COLOR_NEAR(0, 0, expectedColor, kPixelTolerance);
    }

    void testRGRender(GLenum internalformat, GLenum format)
    {
        glBindRenderbuffer(GL_RENDERBUFFER, mRenderbuffer);
        glRenderbufferStorage(GL_RENDERBUFFER, internalformat, 1, 1);
        glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_RENDERBUFFER,
                                  mRenderbuffer);
        glBindRenderbuffer(GL_RENDERBUFFER, 0);
        EXPECT_GL_NO_ERROR();

        glClearColor(1.0f, 1.0f, 1.0f, 1.0f);
        glClear(GL_COLOR_BUFFER_BIT);

        glCopyTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, 0, 0, 1, 1);

        ASSERT_GL_NO_ERROR();
        EXPECT_PIXEL_COLOR_EQ(0, 0, SliceFormatColor(format, GLColor(255u, 255u, 255u, 255u)));
    }

    GLuint mRenderableTexture;
    GLuint mTestTexture;
    GLuint mFBO;
    GLuint mRenderbuffer;
};

// Test unorm texture formats enabled by the GL_EXT_texture_rg extension.
TEST_P(Texture2DRGTest, TextureRGUNormTest)
{
    ANGLE_SKIP_TEST_IF(!IsGLExtensionEnabled("GL_EXT_texture_rg"));

    GLubyte pixelValue  = 0xab;
    GLubyte imageData[] = {pixelValue, pixelValue};

    setupFormatTextures(GL_RED_EXT, GL_RED_EXT, GL_UNSIGNED_BYTE, imageData);
    testRGTexture(
        SliceFormatColor(GL_RED_EXT, GLColor(pixelValue, pixelValue, pixelValue, pixelValue)));
    testRGRender(GL_R8_EXT, GL_RED_EXT);

    setupFormatTextures(GL_RG_EXT, GL_RG_EXT, GL_UNSIGNED_BYTE, imageData);
    testRGTexture(
        SliceFormatColor(GL_RG_EXT, GLColor(pixelValue, pixelValue, pixelValue, pixelValue)));
    testRGRender(GL_RG8_EXT, GL_RG_EXT);
}

// Test float texture formats enabled by the GL_EXT_texture_rg extension.
TEST_P(Texture2DRGTest, TextureRGFloatTest)
{
    ANGLE_SKIP_TEST_IF(!IsGLExtensionEnabled("GL_EXT_texture_rg"));
    ANGLE_SKIP_TEST_IF(!IsGLExtensionEnabled("GL_OES_texture_float"));

    GLfloat pixelValue  = 0.54321;
    GLfloat imageData[] = {pixelValue, pixelValue};

    GLubyte expectedValue = static_cast<GLubyte>(pixelValue * 255.0f);
    GLColor expectedColor = GLColor(expectedValue, expectedValue, expectedValue, expectedValue);

    setupFormatTextures(GL_RED_EXT, GL_RED_EXT, GL_FLOAT, imageData);
    testRGTexture(SliceFormatColor(GL_RED_EXT, expectedColor));

    setupFormatTextures(GL_RG_EXT, GL_RG_EXT, GL_FLOAT, imageData);
    testRGTexture(SliceFormatColor(GL_RG_EXT, expectedColor));
}

// Test half-float texture formats enabled by the GL_EXT_texture_rg extension.
TEST_P(Texture2DRGTest, TextureRGHalfFloatTest)
{
    ANGLE_SKIP_TEST_IF(!IsGLExtensionEnabled("GL_EXT_texture_rg"));
    ANGLE_SKIP_TEST_IF(!IsGLExtensionEnabled("GL_OES_texture_half_float"));

    GLfloat pixelValueFloat = 0.543f;
    GLhalf pixelValue       = 0x3858;
    GLhalf imageData[]      = {pixelValue, pixelValue};

    GLubyte expectedValue = static_cast<GLubyte>(pixelValueFloat * 255.0f);
    GLColor expectedColor = GLColor(expectedValue, expectedValue, expectedValue, expectedValue);

    setupFormatTextures(GL_RED_EXT, GL_RED_EXT, GL_HALF_FLOAT_OES, imageData);
    testRGTexture(SliceFormatColor(GL_RED_EXT, expectedColor));

    setupFormatTextures(GL_RG_EXT, GL_RG_EXT, GL_HALF_FLOAT_OES, imageData);
    testRGTexture(SliceFormatColor(GL_RG_EXT, expectedColor));
}

class Texture2DFloatTest : public Texture2DTest
{
  protected:
    Texture2DFloatTest()
        : Texture2DTest(), mRenderableTexture(0), mTestTexture(0), mFBO(0), mRenderbuffer(0)
    {}

    void testSetUp() override
    {
        Texture2DTest::testSetUp();

        glActiveTexture(GL_TEXTURE0);
        glGenTextures(1, &mRenderableTexture);
        glGenTextures(1, &mTestTexture);
        glGenFramebuffers(1, &mFBO);
        glGenRenderbuffers(1, &mRenderbuffer);

        setUpProgram();
        glUseProgram(mProgram);
        glUniform1i(mTexture2DUniformLocation, 0);

        glBindTexture(GL_TEXTURE_2D, mRenderableTexture);
        glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 1, 1, 0, GL_RGBA, GL_UNSIGNED_BYTE, nullptr);

        glBindFramebuffer(GL_FRAMEBUFFER, mFBO);
        glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D,
                               mRenderableTexture, 0);

        ASSERT_GL_NO_ERROR();
    }

    void testTearDown() override
    {
        glDeleteTextures(1, &mRenderableTexture);
        glDeleteTextures(1, &mTestTexture);
        glDeleteFramebuffers(1, &mFBO);
        glDeleteRenderbuffers(1, &mRenderbuffer);

        Texture2DTest::testTearDown();
    }

    void testFloatTextureSample(GLenum internalFormat, GLenum format, GLenum type)
    {
        constexpr GLfloat imageDataFloat[] = {
            0.2f,
            0.3f,
            0.4f,
            0.5f,
        };
        constexpr GLhalf imageDataHalf[] = {
            0x3266,
            0x34CD,
            0x3666,
            0x3800,
        };
        GLColor expectedValue;
        for (int i = 0; i < 4; i++)
        {
            expectedValue[i] = static_cast<GLubyte>(imageDataFloat[i] * 255.0f);
        }

        const GLvoid *imageData;
        switch (type)
        {
            case GL_FLOAT:
                imageData = imageDataFloat;
                break;
            case GL_HALF_FLOAT:
            case GL_HALF_FLOAT_OES:
                imageData = imageDataHalf;
                break;
            default:
                imageData = nullptr;
        }
        ASSERT(imageData != nullptr);

        glBindTexture(GL_TEXTURE_2D, mTestTexture);
        glTexImage2D(GL_TEXTURE_2D, 0, internalFormat, 1, 1, 0, format, type, imageData);

        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);

        glBindFramebuffer(GL_FRAMEBUFFER, mFBO);
        drawQuad(mProgram, "position", 0.5f);

        EXPECT_GL_NO_ERROR();
        EXPECT_PIXEL_COLOR_NEAR(0, 0, SliceFormatColor(format, expectedValue), kPixelTolerance);
    }

    void testFloatTextureLinear(GLenum internalFormat, GLenum format, GLenum type)
    {
        int numComponents;
        switch (format)
        {
            case GL_RGBA:
                numComponents = 4;
                break;
            case GL_RGB:
                numComponents = 3;
                break;
            case GL_LUMINANCE_ALPHA:
                numComponents = 2;
                break;
            case GL_LUMINANCE:
            case GL_ALPHA:
                numComponents = 1;
                break;
            default:
                numComponents = 0;
        }
        ASSERT(numComponents > 0);

        constexpr GLfloat pixelIntensitiesFloat[] = {0.0f, 1.0f, 0.0f, 1.0f};
        constexpr GLhalf pixelIntensitiesHalf[]   = {0x0000, 0x3C00, 0x0000, 0x3C00};

        GLfloat imageDataFloat[16];
        GLhalf imageDataHalf[16];
        for (int i = 0; i < 4; i++)
        {
            for (int c = 0; c < numComponents; c++)
            {
                imageDataFloat[i * numComponents + c] = pixelIntensitiesFloat[i];
                imageDataHalf[i * numComponents + c]  = pixelIntensitiesHalf[i];
            }
        }

        const GLvoid *imageData;
        switch (type)
        {
            case GL_FLOAT:
                imageData = imageDataFloat;
                break;
            case GL_HALF_FLOAT:
            case GL_HALF_FLOAT_OES:
                imageData = imageDataHalf;
                break;
            default:
                imageData = nullptr;
        }
        ASSERT(imageData != nullptr);

        glBindTexture(GL_TEXTURE_2D, mTestTexture);
        glTexImage2D(GL_TEXTURE_2D, 0, internalFormat, 2, 2, 0, format, type, imageData);

        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);

        glBindFramebuffer(GL_FRAMEBUFFER, mFBO);
        drawQuad(mProgram, "position", 0.5f);

        EXPECT_GL_NO_ERROR();
        // Source texture contains 2 black pixels and 2 white pixels, we sample in the center so we
        // should expect the final value to be gray (halfway in-between)
        EXPECT_PIXEL_COLOR_NEAR(0, 0, SliceFormatColor(format, GLColor(127u, 127u, 127u, 127u)),
                                kPixelTolerance);
    }

    bool performFloatTextureRender(GLenum internalFormat,
                                   GLenum renderBufferFormat,
                                   GLenum format,
                                   GLenum type)
    {
        glBindTexture(GL_TEXTURE_2D, mTestTexture);
        glTexImage2D(GL_TEXTURE_2D, 0, internalFormat, 1, 1, 0, format, type, nullptr);
        glBindTexture(GL_TEXTURE_2D, 0);

        glBindRenderbuffer(GL_RENDERBUFFER, mRenderbuffer);
        glRenderbufferStorage(GL_RENDERBUFFER, renderBufferFormat, 1, 1);
        glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_RENDERBUFFER,
                                  mRenderbuffer);
        glBindRenderbuffer(GL_RENDERBUFFER, 0);
        EXPECT_GL_NO_ERROR();

        if (glCheckFramebufferStatus(GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE)
        {
            return false;
        }

        glBindFramebuffer(GL_FRAMEBUFFER, mFBO);

        glClearColor(1.0f, 1.0f, 1.0f, 1.0f);
        glClear(GL_COLOR_BUFFER_BIT);

        EXPECT_GL_NO_ERROR();
        return true;
    }

    GLuint mRenderableTexture;
    GLuint mTestTexture;
    GLuint mFBO;
    GLuint mRenderbuffer;
};

class Texture2DFloatTestES3 : public Texture2DFloatTest
{
  protected:
    void testFloatTextureRender(GLenum internalFormat, GLenum format, GLenum type)
    {
        bool framebufferComplete =
            performFloatTextureRender(internalFormat, internalFormat, format, type);
        EXPECT_TRUE(framebufferComplete);
        EXPECT_PIXEL_COLOR32F_NEAR(0, 0,
                                   SliceFormatColor32F(format, GLColor32F(1.0f, 1.0f, 1.0f, 1.0f)),
                                   kPixelTolerance32F);
    }
};

class Texture2DFloatTestES2 : public Texture2DFloatTest
{
  protected:
    bool checkFloatTextureRender(GLenum renderBufferFormat, GLenum format, GLenum type)
    {
        bool framebufferComplete =
            performFloatTextureRender(format, renderBufferFormat, format, type);

        if (!framebufferComplete)
        {
            return false;
        }

        EXPECT_PIXEL_COLOR32F_NEAR(0, 0,
                                   SliceFormatColor32F(format, GLColor32F(1.0f, 1.0f, 1.0f, 1.0f)),
                                   kPixelTolerance32F);
        return true;
    }
};

// Test texture sampling for ES3 float texture formats
TEST_P(Texture2DFloatTestES3, TextureFloatSampleBasicTest)
{
    testFloatTextureSample(GL_RGBA32F, GL_RGBA, GL_FLOAT);
    testFloatTextureSample(GL_RGB32F, GL_RGB, GL_FLOAT);
}

// Test texture sampling for ES2 float texture formats
TEST_P(Texture2DFloatTestES2, TextureFloatSampleBasicTest)
{
    ANGLE_SKIP_TEST_IF(!IsGLExtensionEnabled("GL_OES_texture_float"));
    testFloatTextureSample(GL_RGBA, GL_RGBA, GL_FLOAT);
    testFloatTextureSample(GL_RGB, GL_RGB, GL_FLOAT);
}

// Test texture sampling for ES3 half float texture formats
TEST_P(Texture2DFloatTestES3, TextureHalfFloatSampleBasicTest)
{
    testFloatTextureSample(GL_RGBA16F, GL_RGBA, GL_HALF_FLOAT);
    testFloatTextureSample(GL_RGB16F, GL_RGB, GL_HALF_FLOAT);
}

// Test texture sampling for ES2 half float texture formats
TEST_P(Texture2DFloatTestES2, TextureHalfFloatSampleBasicTest)
{
    ANGLE_SKIP_TEST_IF(!IsGLExtensionEnabled("GL_OES_texture_half_float"));
    testFloatTextureSample(GL_RGBA, GL_RGBA, GL_HALF_FLOAT_OES);
    testFloatTextureSample(GL_RGB, GL_RGB, GL_HALF_FLOAT_OES);
}

// Test texture sampling for legacy GLES 2.0 float texture formats in ES3
TEST_P(Texture2DFloatTestES3, TextureFloatSampleLegacyTest)
{
    ANGLE_SKIP_TEST_IF(!IsGLExtensionEnabled("GL_OES_texture_float"));

    testFloatTextureSample(GL_LUMINANCE, GL_LUMINANCE, GL_FLOAT);
    testFloatTextureSample(GL_ALPHA, GL_ALPHA, GL_FLOAT);
    testFloatTextureSample(GL_LUMINANCE_ALPHA, GL_LUMINANCE_ALPHA, GL_FLOAT);

    if (IsGLExtensionEnabled("GL_EXT_texture_storage"))
    {
        testFloatTextureSample(GL_LUMINANCE32F_EXT, GL_LUMINANCE, GL_FLOAT);
        testFloatTextureSample(GL_ALPHA32F_EXT, GL_ALPHA, GL_FLOAT);
        testFloatTextureSample(GL_LUMINANCE_ALPHA32F_EXT, GL_LUMINANCE_ALPHA, GL_FLOAT);
    }
}

// Test texture sampling for legacy GLES 2.0 float texture formats in ES2
TEST_P(Texture2DFloatTestES2, TextureFloatSampleLegacyTest)
{
    ANGLE_SKIP_TEST_IF(!IsGLExtensionEnabled("GL_OES_texture_float"));

    testFloatTextureSample(GL_LUMINANCE, GL_LUMINANCE, GL_FLOAT);
    testFloatTextureSample(GL_ALPHA, GL_ALPHA, GL_FLOAT);
    testFloatTextureSample(GL_LUMINANCE_ALPHA, GL_LUMINANCE_ALPHA, GL_FLOAT);
}

// Test texture sampling for legacy GLES 2.0 half float texture formats in ES3
TEST_P(Texture2DFloatTestES3, TextureHalfFloatSampleLegacyTest)
{
    ANGLE_SKIP_TEST_IF(!IsGLExtensionEnabled("GL_OES_texture_half_float"));

    testFloatTextureSample(GL_LUMINANCE, GL_LUMINANCE, GL_HALF_FLOAT_OES);
    testFloatTextureSample(GL_ALPHA, GL_ALPHA, GL_HALF_FLOAT_OES);
    testFloatTextureSample(GL_LUMINANCE_ALPHA, GL_LUMINANCE_ALPHA, GL_HALF_FLOAT_OES);

    if (IsGLExtensionEnabled("GL_EXT_texture_storage"))
    {
        testFloatTextureSample(GL_LUMINANCE16F_EXT, GL_LUMINANCE, GL_HALF_FLOAT);
        testFloatTextureSample(GL_ALPHA16F_EXT, GL_ALPHA, GL_HALF_FLOAT);
        testFloatTextureSample(GL_LUMINANCE_ALPHA16F_EXT, GL_LUMINANCE_ALPHA, GL_HALF_FLOAT);
    }
}
// Test texture sampling for legacy GLES 2.0 half float texture formats in ES2
TEST_P(Texture2DFloatTestES2, TextureHalfFloatSampleLegacyTest)
{
    ANGLE_SKIP_TEST_IF(!IsGLExtensionEnabled("GL_OES_texture_half_float"));

    testFloatTextureSample(GL_LUMINANCE, GL_LUMINANCE, GL_HALF_FLOAT_OES);
    testFloatTextureSample(GL_ALPHA, GL_ALPHA, GL_HALF_FLOAT_OES);
    testFloatTextureSample(GL_LUMINANCE_ALPHA, GL_LUMINANCE_ALPHA, GL_HALF_FLOAT_OES);
}

// Test linear sampling for ES3 32F formats
TEST_P(Texture2DFloatTestES3, TextureFloatLinearTest)
{
    ANGLE_SKIP_TEST_IF(!IsGLExtensionEnabled("GL_OES_texture_float_linear"));

    testFloatTextureLinear(GL_RGBA32F, GL_RGBA, GL_FLOAT);
    testFloatTextureLinear(GL_RGB32F, GL_RGB, GL_FLOAT);
}
// Test linear sampling for ES2 32F formats
TEST_P(Texture2DFloatTestES2, TextureFloatLinearTest)
{
    ANGLE_SKIP_TEST_IF(!IsGLExtensionEnabled("GL_OES_texture_float_linear"));

    ANGLE_SKIP_TEST_IF(!IsGLExtensionEnabled("GL_OES_texture_float"));

    testFloatTextureLinear(GL_RGBA, GL_RGBA, GL_FLOAT);
}

// Test linear sampling for ES3 16F formats
TEST_P(Texture2DFloatTestES3, TextureHalfFloatLinearTest)
{
    // Half float formats must be linearly filterable in GLES 3.0 core
    testFloatTextureLinear(GL_RGBA16F, GL_RGBA, GL_HALF_FLOAT);
    testFloatTextureLinear(GL_RGB16F, GL_RGB, GL_HALF_FLOAT);
}
// Test linear sampling for ES2 16F formats
TEST_P(Texture2DFloatTestES2, TextureHalfFloatLinearTest)
{
    ANGLE_SKIP_TEST_IF(!IsGLExtensionEnabled("GL_OES_texture_half_float_linear"));
    testFloatTextureLinear(GL_RGBA, GL_RGBA, GL_HALF_FLOAT_OES);
    testFloatTextureLinear(GL_RGB, GL_RGB, GL_HALF_FLOAT_OES);
}

// Test linear sampling for legacy GLES 2.0 32F formats in ES3
TEST_P(Texture2DFloatTestES3, TextureFloatLinearLegacyTest)
{
    ANGLE_SKIP_TEST_IF(!IsGLExtensionEnabled("GL_OES_texture_float"));
    ANGLE_SKIP_TEST_IF(!IsGLExtensionEnabled("GL_OES_texture_float_linear"));

    testFloatTextureLinear(GL_LUMINANCE, GL_LUMINANCE, GL_FLOAT);
    testFloatTextureLinear(GL_ALPHA, GL_ALPHA, GL_FLOAT);
    testFloatTextureLinear(GL_LUMINANCE_ALPHA, GL_LUMINANCE_ALPHA, GL_FLOAT);

    if (IsGLExtensionEnabled("GL_EXT_texture_storage"))
    {
        testFloatTextureLinear(GL_LUMINANCE32F_EXT, GL_LUMINANCE, GL_FLOAT);
        testFloatTextureLinear(GL_ALPHA32F_EXT, GL_ALPHA, GL_FLOAT);
        testFloatTextureLinear(GL_LUMINANCE_ALPHA32F_EXT, GL_LUMINANCE_ALPHA, GL_FLOAT);
    }
}
// Test linear sampling for legacy GLES 2.0 32F formats in ES2
TEST_P(Texture2DFloatTestES2, TextureFloatLinearLegacyTest)
{
    ANGLE_SKIP_TEST_IF(!IsGLExtensionEnabled("GL_OES_texture_float"));
    ANGLE_SKIP_TEST_IF(!IsGLExtensionEnabled("GL_OES_texture_float_linear"));

    testFloatTextureLinear(GL_LUMINANCE, GL_LUMINANCE, GL_FLOAT);
    testFloatTextureLinear(GL_ALPHA, GL_ALPHA, GL_FLOAT);
    testFloatTextureLinear(GL_LUMINANCE_ALPHA, GL_LUMINANCE_ALPHA, GL_FLOAT);
}

// Test linear sampling for legacy GLES 2.0 16F formats in ES3
TEST_P(Texture2DFloatTestES3, TextureHalfFloatLinearLegacyTest)
{
    ANGLE_SKIP_TEST_IF(!IsGLExtensionEnabled("GL_OES_texture_half_float"));
    ANGLE_SKIP_TEST_IF(!IsGLExtensionEnabled("GL_OES_texture_half_float_linear"));

    testFloatTextureLinear(GL_LUMINANCE, GL_LUMINANCE, GL_HALF_FLOAT_OES);
    testFloatTextureLinear(GL_ALPHA, GL_ALPHA, GL_HALF_FLOAT_OES);
    testFloatTextureLinear(GL_LUMINANCE_ALPHA, GL_LUMINANCE_ALPHA, GL_HALF_FLOAT_OES);

    if (IsGLExtensionEnabled("GL_EXT_texture_storage"))
    {
        testFloatTextureLinear(GL_LUMINANCE16F_EXT, GL_LUMINANCE, GL_HALF_FLOAT);
        testFloatTextureLinear(GL_ALPHA16F_EXT, GL_ALPHA, GL_HALF_FLOAT);
        testFloatTextureLinear(GL_LUMINANCE_ALPHA16F_EXT, GL_LUMINANCE_ALPHA, GL_HALF_FLOAT);
    }
}
// Test linear sampling for legacy GLES 2.0 16F formats in ES2
TEST_P(Texture2DFloatTestES2, TextureHalfFloatLinearLegacyTest)
{
    ANGLE_SKIP_TEST_IF(!IsGLExtensionEnabled("GL_OES_texture_half_float"));
    ANGLE_SKIP_TEST_IF(!IsGLExtensionEnabled("GL_OES_texture_half_float_linear"));

    testFloatTextureLinear(GL_LUMINANCE, GL_LUMINANCE, GL_HALF_FLOAT_OES);
    testFloatTextureLinear(GL_ALPHA, GL_ALPHA, GL_HALF_FLOAT_OES);
    testFloatTextureLinear(GL_LUMINANCE_ALPHA, GL_LUMINANCE_ALPHA, GL_HALF_FLOAT_OES);
}

// Test color-renderability for ES3 float and half float textures
TEST_P(Texture2DFloatTestES3, TextureFloatRenderTest)
{
    // EXT_color_buffer_float covers float, half float, and 11-11-10 float formats
    ANGLE_SKIP_TEST_IF(!IsGLExtensionEnabled("GL_EXT_color_buffer_float"));

    testFloatTextureRender(GL_R32F, GL_RED, GL_FLOAT);
    testFloatTextureRender(GL_RG32F, GL_RG, GL_FLOAT);
    testFloatTextureRender(GL_RGBA32F, GL_RGBA, GL_FLOAT);

    testFloatTextureRender(GL_R16F, GL_RED, GL_HALF_FLOAT);
    testFloatTextureRender(GL_RG16F, GL_RG, GL_HALF_FLOAT);
    testFloatTextureRender(GL_RGBA16F, GL_RGBA, GL_HALF_FLOAT);

    testFloatTextureRender(GL_R11F_G11F_B10F, GL_RGB, GL_FLOAT);
}

// Test color-renderability for ES2 half float textures
TEST_P(Texture2DFloatTestES2, TextureFloatRenderTest)
{
    // EXT_color_buffer_half_float requires at least one format to be renderable, but does not
    // require a specific one
    ANGLE_SKIP_TEST_IF(!IsGLExtensionEnabled("GL_EXT_color_buffer_half_float"));
    // https://crbug.com/1003971
    ANGLE_SKIP_TEST_IF(IsOzone());

    bool atLeastOneSupported = false;

    if (IsGLExtensionEnabled("GL_OES_texture_half_float") ||
        IsGLExtensionEnabled("GL_OES_texture_half_float"))
    {
        atLeastOneSupported |= checkFloatTextureRender(GL_R16F_EXT, GL_RED_EXT, GL_HALF_FLOAT_OES);
        atLeastOneSupported |= checkFloatTextureRender(GL_RG16F_EXT, GL_RG_EXT, GL_HALF_FLOAT_OES);
    }
    if (IsGLExtensionEnabled("GL_OES_texture_half_float"))
    {
        atLeastOneSupported |= checkFloatTextureRender(GL_RGB16F_EXT, GL_RGB, GL_HALF_FLOAT_OES);

        // If OES_texture_half_float is supported, then RGBA half float textures must be renderable
        bool rgbaSupported = checkFloatTextureRender(GL_RGBA16F_EXT, GL_RGBA, GL_HALF_FLOAT_OES);
        EXPECT_TRUE(rgbaSupported);
        atLeastOneSupported |= rgbaSupported;
    }

    EXPECT_TRUE(atLeastOneSupported);
}

// Test that UNPACK_SKIP_IMAGES doesn't have an effect on 2D texture uploads.
// GLES 3.0.4 section 3.8.3.
TEST_P(Texture2DTestES3, UnpackSkipImages2D)
{
    // Crashes on Nexus 5X due to a driver bug. http://anglebug.com/1429
    ANGLE_SKIP_TEST_IF((IsNexus5X() || IsNexus6P()) && IsOpenGLES());

    glBindTexture(GL_TEXTURE_2D, mTexture2D);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
    ASSERT_GL_NO_ERROR();

    // SKIP_IMAGES should not have an effect on uploading 2D textures
    glPixelStorei(GL_UNPACK_SKIP_IMAGES, 1000);
    ASSERT_GL_NO_ERROR();

    std::vector<GLColor> pixelsGreen(128u * 128u, GLColor::green);

    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, 128, 128, 0, GL_RGBA, GL_UNSIGNED_BYTE,
                 pixelsGreen.data());
    ASSERT_GL_NO_ERROR();

    glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, 128, 128, GL_RGBA, GL_UNSIGNED_BYTE,
                    pixelsGreen.data());
    ASSERT_GL_NO_ERROR();

    glUseProgram(mProgram);
    drawQuad(mProgram, "position", 0.5f);
    ASSERT_GL_NO_ERROR();

    EXPECT_PIXEL_COLOR_EQ(0, 0, GLColor::green);
}

// Test that skip defined in unpack parameters is taken into account when determining whether
// unpacking source extends outside unpack buffer bounds.
TEST_P(Texture2DTestES3, UnpackSkipPixelsOutOfBounds)
{
    glBindTexture(GL_TEXTURE_2D, mTexture2D);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
    ASSERT_GL_NO_ERROR();

    GLBuffer buf;
    glBindBuffer(GL_PIXEL_UNPACK_BUFFER, buf.get());
    std::vector<GLColor> pixelsGreen(128u * 128u, GLColor::green);
    glBufferData(GL_PIXEL_UNPACK_BUFFER, pixelsGreen.size() * 4u, pixelsGreen.data(),
                 GL_DYNAMIC_COPY);
    ASSERT_GL_NO_ERROR();

    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, 128, 128, 0, GL_RGBA, GL_UNSIGNED_BYTE, 0);
    ASSERT_GL_NO_ERROR();

    glPixelStorei(GL_UNPACK_SKIP_PIXELS, 1);
    ASSERT_GL_NO_ERROR();

    glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, 128, 128, GL_RGBA, GL_UNSIGNED_BYTE, 0);
    EXPECT_GL_ERROR(GL_INVALID_OPERATION);

    glPixelStorei(GL_UNPACK_SKIP_PIXELS, 0);
    glPixelStorei(GL_UNPACK_SKIP_ROWS, 1);
    ASSERT_GL_NO_ERROR();

    glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, 128, 128, GL_RGBA, GL_UNSIGNED_BYTE, 0);
    EXPECT_GL_ERROR(GL_INVALID_OPERATION);
}

// Test that unpacking rows that overlap in a pixel unpack buffer works as expected.
TEST_P(Texture2DTestES3, UnpackOverlappingRowsFromUnpackBuffer)
{
    ANGLE_SKIP_TEST_IF(IsD3D11());

    // Incorrect rendering results seen on OSX AMD.
    ANGLE_SKIP_TEST_IF(IsOSX() && IsAMD());

    const GLuint width            = 8u;
    const GLuint height           = 8u;
    const GLuint unpackRowLength  = 5u;
    const GLuint unpackSkipPixels = 1u;

    setWindowWidth(width);
    setWindowHeight(height);

    glBindTexture(GL_TEXTURE_2D, mTexture2D);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
    ASSERT_GL_NO_ERROR();

    GLBuffer buf;
    glBindBuffer(GL_PIXEL_UNPACK_BUFFER, buf.get());
    std::vector<GLColor> pixelsGreen((height - 1u) * unpackRowLength + width + unpackSkipPixels,
                                     GLColor::green);

    for (GLuint skippedPixel = 0u; skippedPixel < unpackSkipPixels; ++skippedPixel)
    {
        pixelsGreen[skippedPixel] = GLColor(255, 0, 0, 255);
    }

    glBufferData(GL_PIXEL_UNPACK_BUFFER, pixelsGreen.size() * 4u, pixelsGreen.data(),
                 GL_DYNAMIC_COPY);
    ASSERT_GL_NO_ERROR();

    glPixelStorei(GL_UNPACK_ROW_LENGTH, unpackRowLength);
    glPixelStorei(GL_UNPACK_SKIP_PIXELS, unpackSkipPixels);
    ASSERT_GL_NO_ERROR();

    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, width, height, 0, GL_RGBA, GL_UNSIGNED_BYTE, 0);
    ASSERT_GL_NO_ERROR();

    glUseProgram(mProgram);
    drawQuad(mProgram, "position", 0.5f);
    ASSERT_GL_NO_ERROR();

    GLuint windowPixelCount = getWindowWidth() * getWindowHeight();
    std::vector<GLColor> actual(windowPixelCount, GLColor::black);
    glReadPixels(0, 0, getWindowWidth(), getWindowHeight(), GL_RGBA, GL_UNSIGNED_BYTE,
                 actual.data());
    std::vector<GLColor> expected(windowPixelCount, GLColor::green);
    EXPECT_EQ(expected, actual);
}

template <typename T>
T UNorm(double value)
{
    return static_cast<T>(value * static_cast<double>(std::numeric_limits<T>::max()));
}

// Test rendering a depth texture with mipmaps.
TEST_P(Texture2DTestES3, DepthTexturesWithMipmaps)
{
    // TODO(cwallez) this is failing on Intel Win7 OpenGL.
    // TODO(zmo) this is faling on Win Intel HD 530 Debug.
    // http://anglebug.com/1706
    ANGLE_SKIP_TEST_IF(IsIntel() && IsWindows() && IsOpenGL());

    // Seems to fail on AMD D3D11. Possibly driver bug. http://anglebug.com/3342
    ANGLE_SKIP_TEST_IF(IsAMD() && IsWindows() && IsD3D11());

    // TODO(cnorthrop): Also failing on Vulkan/Windows/AMD. http://anglebug.com/3950
    ANGLE_SKIP_TEST_IF(IsAMD() && IsWindows() && IsVulkan());

    const int size = getWindowWidth();

    auto dim   = [size](int level) { return size >> level; };
    int levels = gl::log2(size);

    glActiveTexture(GL_TEXTURE0);
    glBindTexture(GL_TEXTURE_2D, mTexture2D);
    glTexStorage2D(GL_TEXTURE_2D, levels, GL_DEPTH_COMPONENT24, size, size);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST_MIPMAP_NEAREST);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
    glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
    ASSERT_GL_NO_ERROR();

    glUseProgram(mProgram);
    glUniform1i(mTexture2DUniformLocation, 0);

    std::vector<unsigned char> expected;

    for (int level = 0; level < levels; ++level)
    {
        double value = (static_cast<double>(level) / static_cast<double>(levels - 1));
        expected.push_back(UNorm<unsigned char>(value));

        int levelDim = dim(level);

        ASSERT_GT(levelDim, 0);

        std::vector<unsigned int> initData(levelDim * levelDim, UNorm<unsigned int>(value));
        glTexSubImage2D(GL_TEXTURE_2D, level, 0, 0, levelDim, levelDim, GL_DEPTH_COMPONENT,
                        GL_UNSIGNED_INT, initData.data());
    }
    ASSERT_GL_NO_ERROR();

    for (int level = 0; level < levels; ++level)
    {
        glViewport(0, 0, dim(level), dim(level));
        drawQuad(mProgram, "position", 0.5f);
        GLColor actual = ReadColor(0, 0);
        EXPECT_NEAR(expected[level], actual.R, 10u);
    }

    ASSERT_GL_NO_ERROR();
}

class Texture2DDepthTest : public Texture2DTest
{
  protected:
    Texture2DDepthTest() : Texture2DTest() {}

    const char *getVertexShaderSource() override
    {
        return "attribute vec4 vPosition;\n"
               "void main() {\n"
               "  gl_Position = vPosition;\n"
               "}\n";
    }

    const char *getFragmentShaderSource() override
    {
        return "precision mediump float;\n"
               "uniform sampler2D ShadowMap;"
               "void main() {\n"
               "  vec4 shadow_value = texture2D(ShadowMap, vec2(0.5, 0.5));"
               "  if (shadow_value.x == shadow_value.z && shadow_value.x != 0.0) {"
               "    gl_FragColor = vec4(1.0, 0.0, 0.0, 1.0);"
               "  } else {"
               "    gl_FragColor = vec4(0.0, 1.0, 0.0, 1.0);\n"
               "  }"
               "}\n";
    }

    bool checkTexImageFormatSupport(GLenum format, GLenum internalformat, GLenum type)
    {
        EXPECT_GL_NO_ERROR();

        GLTexture tex;
        glBindTexture(GL_TEXTURE_2D, tex);
        glTexImage2D(GL_TEXTURE_2D, 0, format, 1, 1, 0, format, type, nullptr);

        return (glGetError() == GL_NO_ERROR);
    }

    void testBehavior(bool useSizedComponent)
    {
        int w                 = getWindowWidth();
        int h                 = getWindowHeight();
        GLuint format         = GL_DEPTH_COMPONENT;
        GLuint internalFormat = GL_DEPTH_COMPONENT;

        if (useSizedComponent)
        {
            internalFormat = GL_DEPTH_COMPONENT24;
        }

        GLFramebuffer fbo;
        glBindFramebuffer(GL_FRAMEBUFFER, fbo);
        ASSERT_GL_NO_ERROR();

        GLTexture depthTexture;
        glBindTexture(GL_TEXTURE_2D, depthTexture);
        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);

        TexCoordDrawTest::setUpProgram();
        GLint shadowMapLocation = glGetUniformLocation(mProgram, "ShadowMap");
        ASSERT_NE(-1, shadowMapLocation);

        GLint positionLocation = glGetAttribLocation(mProgram, "vPosition");
        ASSERT_NE(-1, positionLocation);

        ANGLE_SKIP_TEST_IF(!checkTexImageFormatSupport(format, internalFormat, GL_UNSIGNED_INT));
        glBindTexture(GL_TEXTURE_2D, depthTexture);
        glTexImage2D(GL_TEXTURE_2D, 0, internalFormat, w, h, 0, format, GL_UNSIGNED_INT, nullptr);
        ASSERT_GL_NO_ERROR();

        // try adding a color buffer.
        GLuint colorTex = 0;
        glGenTextures(1, &colorTex);
        glBindTexture(GL_TEXTURE_2D, colorTex);
        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
        glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, w, h, 0, GL_RGBA, GL_UNSIGNED_BYTE, nullptr);
        glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, colorTex, 0);
        glFramebufferTexture2D(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_TEXTURE_2D, depthTexture, 0);
        EXPECT_GLENUM_EQ(GL_FRAMEBUFFER_COMPLETE, glCheckFramebufferStatus(GL_FRAMEBUFFER));
        ASSERT_GL_NO_ERROR();

        glViewport(0, 0, w, h);
        // Fill depthTexture with 0.75
        glClearDepthf(0.75);
        glClear(GL_DEPTH_BUFFER_BIT);

        // Revert to normal framebuffer to test depth shader
        glBindFramebuffer(GL_FRAMEBUFFER, 0);
        glViewport(0, 0, w, h);
        glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
        glClearDepthf(0.0f);
        ASSERT_GL_NO_ERROR();

        glClear(GL_DEPTH_BUFFER_BIT | GL_COLOR_BUFFER_BIT);
        ASSERT_GL_NO_ERROR();

        glActiveTexture(GL_TEXTURE0);
        glBindTexture(GL_TEXTURE_2D, depthTexture);

        glUseProgram(mProgram);
        ASSERT_GL_NO_ERROR();

        glUniform1i(shadowMapLocation, 0);

        const GLfloat gTriangleVertices[] = {-0.5f, -0.5f, -0.5f, 0.5f, 0.5f, -0.5f, 0.5f, 0.5f};

        glVertexAttribPointer(positionLocation, 2, GL_FLOAT, GL_FALSE, 0, gTriangleVertices);
        ASSERT_GL_NO_ERROR();
        glEnableVertexAttribArray(positionLocation);
        ASSERT_GL_NO_ERROR();
        glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
        ASSERT_GL_NO_ERROR();

        GLuint pixels[1];
        glReadPixels(w / 2, h / 2, 1, 1, GL_RGBA, GL_UNSIGNED_BYTE, pixels);
        ASSERT_GL_NO_ERROR();

        // The GLES 3.x spec says that the depth texture sample can be found in the RED component.
        // However, the OES_depth_texture indicates that the depth value is treated as luminance and
        // is in all the color components. Multiple implementations implement a workaround that
        // follows the OES_depth_texture behavior if the internalformat given at glTexImage2D was a
        // unsized format (e.g. DEPTH_COMPONENT) and the GLES 3.x behavior if it was a sized
        // internalformat such as GL_DEPTH_COMPONENT24. The shader will write out a different color
        // depending on if it sees the texture sample in only the RED component.
        if (useSizedComponent)
        {
            ASSERT_NE(pixels[0], 0xff0000ff);
        }
        else
        {
            ASSERT_EQ(pixels[0], 0xff0000ff);
        }

        glBindFramebuffer(GL_FRAMEBUFFER, 0);
        glDeleteProgram(mProgram);
    }
};

// Test depth texture compatibility with OES_depth_texture. Uses unsized internformat.
TEST_P(Texture2DDepthTest, DepthTextureES2Compatibility)
{
    ANGLE_SKIP_TEST_IF(IsD3D11());
    ANGLE_SKIP_TEST_IF(IsIntel() && IsD3D9());
    ANGLE_SKIP_TEST_IF(!IsGLExtensionEnabled("GL_ANGLE_depth_texture") &&
                       !IsGLExtensionEnabled("GL_OES_depth_texture"));

    // When the depth texture is specified with unsized internalformat implementations follow
    // OES_depth_texture behavior. Otherwise they follow GLES 3.0 behavior.
    testBehavior(false);
}

// Test depth texture compatibility with GLES3 using sized internalformat.
TEST_P(Texture2DDepthTest, DepthTextureES3Compatibility)
{
    ANGLE_SKIP_TEST_IF(getClientMajorVersion() < 3);

    testBehavior(true);
}

// Tests unpacking into the unsized GL_ALPHA format.
TEST_P(Texture2DTestES3, UnsizedAlphaUnpackBuffer)
{
    // Initialize the texure.
    glBindTexture(GL_TEXTURE_2D, mTexture2D);
    glTexImage2D(GL_TEXTURE_2D, 0, GL_ALPHA, getWindowWidth(), getWindowHeight(), 0, GL_ALPHA,
                 GL_UNSIGNED_BYTE, nullptr);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);

    std::vector<GLubyte> bufferData(getWindowWidth() * getWindowHeight(), 127);

    // Pull in the color data from the unpack buffer.
    GLBuffer unpackBuffer;
    glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
    glBindBuffer(GL_PIXEL_UNPACK_BUFFER, unpackBuffer.get());
    glBufferData(GL_PIXEL_UNPACK_BUFFER, getWindowWidth() * getWindowHeight(), bufferData.data(),
                 GL_STATIC_DRAW);

    glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, getWindowWidth(), getWindowHeight(), GL_ALPHA,
                    GL_UNSIGNED_BYTE, nullptr);

    // Clear to a weird color to make sure we're drawing something.
    glClearColor(0.5f, 0.8f, 1.0f, 0.2f);
    glClear(GL_COLOR_BUFFER_BIT);

    // Draw with the alpha texture and verify.
    drawQuad(mProgram, "position", 0.5f);

    ASSERT_GL_NO_ERROR();
    EXPECT_PIXEL_NEAR(0, 0, 0, 0, 0, 127, 1);
}

// Ensure stale unpack data doesn't propagate in D3D11.
TEST_P(Texture2DTestES3, StaleUnpackData)
{
    // Init unpack buffer.
    GLsizei pixelCount = getWindowWidth() * getWindowHeight() / 2;
    std::vector<GLColor> pixels(pixelCount, GLColor::red);

    GLBuffer unpackBuffer;
    glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
    glBindBuffer(GL_PIXEL_UNPACK_BUFFER, unpackBuffer.get());
    GLsizei bufferSize = pixelCount * sizeof(GLColor);
    glBufferData(GL_PIXEL_UNPACK_BUFFER, bufferSize, pixels.data(), GL_STATIC_DRAW);

    // Create from unpack buffer.
    glBindTexture(GL_TEXTURE_2D, mTexture2D);
    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, getWindowWidth() / 2, getWindowHeight() / 2, 0,
                 GL_RGBA, GL_UNSIGNED_BYTE, nullptr);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);

    drawQuad(mProgram, "position", 0.5f);

    ASSERT_GL_NO_ERROR();
    EXPECT_PIXEL_COLOR_EQ(0, 0, GLColor::red);

    // Fill unpack with green, recreating buffer.
    pixels.assign(getWindowWidth() * getWindowHeight(), GLColor::green);
    GLsizei size2 = getWindowWidth() * getWindowHeight() * sizeof(GLColor);
    glBufferData(GL_PIXEL_UNPACK_BUFFER, size2, pixels.data(), GL_STATIC_DRAW);

    // Reinit texture with green.
    glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, getWindowWidth() / 2, getWindowHeight() / 2, GL_RGBA,
                    GL_UNSIGNED_BYTE, nullptr);

    drawQuad(mProgram, "position", 0.5f);

    ASSERT_GL_NO_ERROR();
    EXPECT_PIXEL_COLOR_EQ(0, 0, GLColor::green);
}

// Ensure that texture parameters passed as floats that are converted to ints are rounded before
// validating they are less than 0.
TEST_P(Texture2DTestES3, TextureBaseMaxLevelRoundingValidation)
{
    GLTexture texture;
    glBindTexture(GL_TEXTURE_2D, texture);

    // Use a negative number that will round to zero when converted to an integer
    // According to the spec(2.3.1 Data Conversion For State - Setting Commands):
    // "Validation of values performed by state-setting commands is performed after conversion,
    // unless specified otherwise for a specific command."
    GLfloat param = -7.30157126e-07f;
    glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_BASE_LEVEL, param);
    EXPECT_GL_NO_ERROR();

    glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAX_LEVEL, param);
    EXPECT_GL_NO_ERROR();
}

// This test covers a D3D format redefinition bug for 3D textures. The base level format was not
// being properly checked, and the texture storage of the previous texture format was persisting.
// This would result in an ASSERT in debug and incorrect rendering in release.
// See http://anglebug.com/1609 and WebGL 2 test conformance2/misc/views-with-offsets.html.
TEST_P(Texture3DTestES3, FormatRedefinitionBug)
{
    GLTexture tex;
    glBindTexture(GL_TEXTURE_3D, tex.get());
    glTexImage3D(GL_TEXTURE_3D, 0, GL_RGBA8, 1, 1, 1, 0, GL_RGBA, GL_UNSIGNED_BYTE, nullptr);

    GLFramebuffer framebuffer;
    glBindFramebuffer(GL_FRAMEBUFFER, framebuffer.get());
    glFramebufferTextureLayer(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, tex.get(), 0, 0);

    glCheckFramebufferStatus(GL_FRAMEBUFFER);

    std::vector<uint8_t> pixelData(100, 0);

    glTexImage3D(GL_TEXTURE_3D, 0, GL_RGB565, 1, 1, 1, 0, GL_RGB, GL_UNSIGNED_SHORT_5_6_5, nullptr);
    glTexSubImage3D(GL_TEXTURE_3D, 0, 0, 0, 0, 1, 1, 1, GL_RGB, GL_UNSIGNED_SHORT_5_6_5,
                    pixelData.data());

    ASSERT_GL_NO_ERROR();
}

// Test basic pixel unpack buffer OOB checks when uploading to a 2D or 3D texture
TEST_P(Texture3DTestES3, BasicUnpackBufferOOB)
{
    // 2D tests
    {
        GLTexture tex;
        glBindTexture(GL_TEXTURE_2D, tex.get());

        GLBuffer pbo;
        glBindBuffer(GL_PIXEL_UNPACK_BUFFER, pbo.get());

        // Test OOB
        glBufferData(GL_PIXEL_UNPACK_BUFFER, sizeof(GLColor) * 2 * 2 - 1, nullptr, GL_STATIC_DRAW);
        glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, 2, 2, 0, GL_RGBA, GL_UNSIGNED_BYTE, nullptr);
        ASSERT_GL_ERROR(GL_INVALID_OPERATION);

        // Test OOB
        glBufferData(GL_PIXEL_UNPACK_BUFFER, sizeof(GLColor) * 2 * 2, nullptr, GL_STATIC_DRAW);
        glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, 2, 2, 0, GL_RGBA, GL_UNSIGNED_BYTE, nullptr);
        ASSERT_GL_NO_ERROR();
    }

    // 3D tests
    {
        GLTexture tex;
        glBindTexture(GL_TEXTURE_3D, tex.get());

        GLBuffer pbo;
        glBindBuffer(GL_PIXEL_UNPACK_BUFFER, pbo.get());

        // Test OOB
        glBufferData(GL_PIXEL_UNPACK_BUFFER, sizeof(GLColor) * 2 * 2 * 2 - 1, nullptr,
                     GL_STATIC_DRAW);
        glTexImage3D(GL_TEXTURE_3D, 0, GL_RGBA8, 2, 2, 2, 0, GL_RGBA, GL_UNSIGNED_BYTE, nullptr);
        ASSERT_GL_ERROR(GL_INVALID_OPERATION);

        // Test OOB
        glBufferData(GL_PIXEL_UNPACK_BUFFER, sizeof(GLColor) * 2 * 2 * 2, nullptr, GL_STATIC_DRAW);
        glTexImage3D(GL_TEXTURE_3D, 0, GL_RGBA8, 2, 2, 2, 0, GL_RGBA, GL_UNSIGNED_BYTE, nullptr);
        ASSERT_GL_NO_ERROR();
    }
}

// Tests behaviour with a single texture and multiple sampler objects.
TEST_P(Texture2DTestES3, SingleTextureMultipleSamplers)
{
    GLint maxTextureUnits = 0;
    glGetIntegerv(GL_MAX_TEXTURE_IMAGE_UNITS, &maxTextureUnits);
    ANGLE_SKIP_TEST_IF(maxTextureUnits < 4);

    constexpr int kSize = 16;

    // Make a single-level texture, fill it with red.
    std::vector<GLColor> redColors(kSize * kSize, GLColor::red);
    GLTexture tex;
    glBindTexture(GL_TEXTURE_2D, tex);
    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, kSize, kSize, 0, GL_RGBA, GL_UNSIGNED_BYTE,
                 redColors.data());
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);

    // Simple sanity check.
    draw2DTexturedQuad(0.5f, 1.0f, true);
    ASSERT_GL_NO_ERROR();
    EXPECT_PIXEL_COLOR_EQ(0, 0, GLColor::red);

    // Bind texture to unit 1 with a sampler object making it incomplete.
    GLSampler sampler;
    glBindSampler(0, sampler);
    glSamplerParameteri(sampler, GL_TEXTURE_MIN_FILTER, GL_NEAREST_MIPMAP_NEAREST);
    glSamplerParameteri(sampler, GL_TEXTURE_MAG_FILTER, GL_NEAREST);

    // Make a mipmap texture, fill it with blue.
    std::vector<GLColor> blueColors(kSize * kSize, GLColor::blue);
    GLTexture mipmapTex;
    glBindTexture(GL_TEXTURE_2D, mipmapTex);
    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, kSize, kSize, 0, GL_RGBA, GL_UNSIGNED_BYTE,
                 blueColors.data());
    glGenerateMipmap(GL_TEXTURE_2D);

    // Draw with the sampler, expect blue.
    draw2DTexturedQuad(0.5f, 1.0f, true);
    ASSERT_GL_NO_ERROR();
    EXPECT_PIXEL_COLOR_EQ(0, 0, GLColor::blue);

    // Simple multitexturing program.
    constexpr char kVS[] =
        "#version 300 es\n"
        "in vec2 position;\n"
        "out vec2 texCoord;\n"
        "void main()\n"
        "{\n"
        "    gl_Position = vec4(position, 0, 1);\n"
        "    texCoord = position * 0.5 + vec2(0.5);\n"
        "}";

    constexpr char kFS[] =
        "#version 300 es\n"
        "precision mediump float;\n"
        "in vec2 texCoord;\n"
        "uniform sampler2D tex1;\n"
        "uniform sampler2D tex2;\n"
        "uniform sampler2D tex3;\n"
        "uniform sampler2D tex4;\n"
        "out vec4 color;\n"
        "void main()\n"
        "{\n"
        "    color = (texture(tex1, texCoord) + texture(tex2, texCoord) \n"
        "          +  texture(tex3, texCoord) + texture(tex4, texCoord)) * 0.25;\n"
        "}";

    ANGLE_GL_PROGRAM(program, kVS, kFS);

    std::array<GLint, 4> texLocations = {
        {glGetUniformLocation(program, "tex1"), glGetUniformLocation(program, "tex2"),
         glGetUniformLocation(program, "tex3"), glGetUniformLocation(program, "tex4")}};
    for (GLint location : texLocations)
    {
        ASSERT_NE(-1, location);
    }

    // Init the uniform data.
    glUseProgram(program);
    for (GLint location = 0; location < 4; ++location)
    {
        glUniform1i(texLocations[location], location);
    }

    // Initialize four samplers
    GLSampler samplers[4];

    // 0: non-mipped.
    glBindSampler(0, samplers[0]);
    glSamplerParameteri(samplers[0], GL_TEXTURE_MIN_FILTER, GL_NEAREST);
    glSamplerParameteri(samplers[0], GL_TEXTURE_MAG_FILTER, GL_NEAREST);

    // 1: mipped.
    glBindSampler(1, samplers[1]);
    glSamplerParameteri(samplers[1], GL_TEXTURE_MIN_FILTER, GL_NEAREST_MIPMAP_NEAREST);
    glSamplerParameteri(samplers[1], GL_TEXTURE_MAG_FILTER, GL_NEAREST);

    // 2: non-mipped.
    glBindSampler(2, samplers[2]);
    glSamplerParameteri(samplers[2], GL_TEXTURE_MIN_FILTER, GL_NEAREST);
    glSamplerParameteri(samplers[2], GL_TEXTURE_MAG_FILTER, GL_NEAREST);

    // 3: mipped.
    glBindSampler(3, samplers[3]);
    glSamplerParameteri(samplers[3], GL_TEXTURE_MIN_FILTER, GL_NEAREST_MIPMAP_NEAREST);
    glSamplerParameteri(samplers[3], GL_TEXTURE_MAG_FILTER, GL_NEAREST);

    // Bind two blue mipped textures and two single layer textures, should all draw.
    glActiveTexture(GL_TEXTURE0);
    glBindTexture(GL_TEXTURE_2D, tex);

    glActiveTexture(GL_TEXTURE1);
    glBindTexture(GL_TEXTURE_2D, mipmapTex);

    glActiveTexture(GL_TEXTURE2);
    glBindTexture(GL_TEXTURE_2D, tex);

    glActiveTexture(GL_TEXTURE3);
    glBindTexture(GL_TEXTURE_2D, mipmapTex);

    ASSERT_GL_NO_ERROR();

    drawQuad(program, "position", 0.5f);
    ASSERT_GL_NO_ERROR();
    EXPECT_PIXEL_NEAR(0, 0, 128, 0, 128, 255, 2);

    // Bind four single layer textures, two should be incomplete.
    glActiveTexture(GL_TEXTURE1);
    glBindTexture(GL_TEXTURE_2D, tex);

    glActiveTexture(GL_TEXTURE3);
    glBindTexture(GL_TEXTURE_2D, tex);

    drawQuad(program, "position", 0.5f);
    ASSERT_GL_NO_ERROR();
    EXPECT_PIXEL_NEAR(0, 0, 128, 0, 0, 255, 2);
}

// The test is added to cover http://anglebug.com/2153. Cubemap completeness checks used to start
// always at level 0 instead of the base level resulting in an incomplete texture if the faces at
// level 0 are not created. The test creates a cubemap texture, specifies the images only for mip
// level 1 filled with white color, updates the base level to be 1 and renders a quad. The program
// samples the cubemap using a direction vector (1,1,1).
TEST_P(TextureCubeTestES3, SpecifyAndSampleFromBaseLevel1)
{
    // Check http://anglebug.com/2155.
    ANGLE_SKIP_TEST_IF(IsOSX() && IsNVIDIA());

    constexpr char kVS[] =
        R"(#version 300 es
        precision mediump float;
        in vec3 pos;
        void main() {
            gl_Position = vec4(pos, 1.0);
        })";

    constexpr char kFS[] =
        R"(#version 300 es
        precision mediump float;
        out vec4 color;
        uniform samplerCube uTex;
        void main(){
            color = texture(uTex, vec3(1.0));
        })";

    ANGLE_GL_PROGRAM(program, kVS, kFS);
    glUseProgram(program);

    glUniform1i(glGetUniformLocation(program, "uTex"), 0);
    glActiveTexture(GL_TEXTURE0);

    GLTexture cubeTex;
    glBindTexture(GL_TEXTURE_CUBE_MAP, cubeTex);

    const int kFaceWidth  = 1;
    const int kFaceHeight = 1;
    std::vector<uint32_t> texData(kFaceWidth * kFaceHeight, 0xFFFFFFFF);
    glTexImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_X, 1, GL_RGBA8, kFaceWidth, kFaceHeight, 0, GL_RGBA,
                 GL_UNSIGNED_BYTE, texData.data());
    glTexImage2D(GL_TEXTURE_CUBE_MAP_NEGATIVE_X, 1, GL_RGBA8, kFaceWidth, kFaceHeight, 0, GL_RGBA,
                 GL_UNSIGNED_BYTE, texData.data());
    glTexImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_Y, 1, GL_RGBA8, kFaceWidth, kFaceHeight, 0, GL_RGBA,
                 GL_UNSIGNED_BYTE, texData.data());
    glTexImage2D(GL_TEXTURE_CUBE_MAP_NEGATIVE_Y, 1, GL_RGBA8, kFaceWidth, kFaceHeight, 0, GL_RGBA,
                 GL_UNSIGNED_BYTE, texData.data());
    glTexImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_Z, 1, GL_RGBA8, kFaceWidth, kFaceHeight, 0, GL_RGBA,
                 GL_UNSIGNED_BYTE, texData.data());
    glTexImage2D(GL_TEXTURE_CUBE_MAP_NEGATIVE_Z, 1, GL_RGBA8, kFaceWidth, kFaceHeight, 0, GL_RGBA,
                 GL_UNSIGNED_BYTE, texData.data());
    glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
    glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
    glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_WRAP_S, GL_REPEAT);
    glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_WRAP_T, GL_REPEAT);
    glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_WRAP_R, GL_REPEAT);
    glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_BASE_LEVEL, 1);

    drawQuad(program, "pos", 0.5f, 1.0f, true);
    ASSERT_GL_NO_ERROR();

    EXPECT_PIXEL_COLOR_EQ(0, 0, angle::GLColor::white);
}

// Verify that using negative texture base level and max level generates GL_INVALID_VALUE.
TEST_P(Texture2DTestES3, NegativeTextureBaseLevelAndMaxLevel)
{
    GLuint texture = create2DTexture();

    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_BASE_LEVEL, -1);
    EXPECT_GL_ERROR(GL_INVALID_VALUE);

    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAX_LEVEL, -1);
    EXPECT_GL_ERROR(GL_INVALID_VALUE);

    glDeleteTextures(1, &texture);
    EXPECT_GL_NO_ERROR();
}

// Test setting base level after calling generateMipmap on a LUMA texture.
// Covers http://anglebug.com/2498
TEST_P(Texture2DTestES3, GenerateMipmapAndBaseLevelLUMA)
{
    glActiveTexture(GL_TEXTURE0);
    glBindTexture(GL_TEXTURE_2D, mTexture2D);

    constexpr const GLsizei kWidth  = 8;
    constexpr const GLsizei kHeight = 8;
    std::array<GLubyte, kWidth * kHeight * 2> whiteData;
    whiteData.fill(255u);

    glTexImage2D(GL_TEXTURE_2D, 0, GL_LUMINANCE_ALPHA, kWidth, kHeight, 0, GL_LUMINANCE_ALPHA,
                 GL_UNSIGNED_BYTE, whiteData.data());
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_NEAREST);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
    glGenerateMipmap(GL_TEXTURE_2D);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_BASE_LEVEL, 1);
    EXPECT_GL_NO_ERROR();

    drawQuad(mProgram, "position", 0.5f);
    EXPECT_PIXEL_COLOR_EQ(0, 0, angle::GLColor::white);
}

// Covers a bug in the D3D11 backend: http://anglebug.com/2772
// When using a sampler the texture was created as if it has mipmaps,
// regardless what you specified in GL_TEXTURE_MIN_FILTER via
// glSamplerParameteri() -- mistakenly the default value
// GL_NEAREST_MIPMAP_LINEAR or the value set via glTexParameteri() was
// evaluated.
// If you didn't provide mipmaps and didn't let the driver generate them
// this led to not sampling your texture data when minification occurred.
TEST_P(Texture2DTestES3, MinificationWithSamplerNoMipmapping)
{
    // TODO: Triage this failure on Vulkan: http://anglebug.com/3950
    ANGLE_SKIP_TEST_IF(IsVulkan());

    constexpr char kVS[] =
        "#version 300 es\n"
        "out vec2 texcoord;\n"
        "in vec4 position;\n"
        "void main()\n"
        "{\n"
        "    gl_Position = vec4(position.xy * 0.1, 0.0, 1.0);\n"
        "    texcoord = (position.xy * 0.5) + 0.5;\n"
        "}\n";

    constexpr char kFS[] =
        "#version 300 es\n"
        "precision highp float;\n"
        "uniform highp sampler2D tex;\n"
        "in vec2 texcoord;\n"
        "out vec4 fragColor;\n"
        "void main()\n"
        "{\n"
        "    fragColor = texture(tex, texcoord);\n"
        "}\n";

    ANGLE_GL_PROGRAM(program, kVS, kFS);

    GLSampler sampler;
    glBindSampler(0, sampler);
    glSamplerParameteri(sampler, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
    glSamplerParameteri(sampler, GL_TEXTURE_MIN_FILTER, GL_LINEAR);

    glActiveTexture(GL_TEXTURE0);
    glBindTexture(GL_TEXTURE_2D, mTexture2D);

    const GLsizei texWidth  = getWindowWidth();
    const GLsizei texHeight = getWindowHeight();
    const std::vector<GLColor> whiteData(texWidth * texHeight, GLColor::white);

    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, texWidth, texHeight, 0, GL_RGBA, GL_UNSIGNED_BYTE,
                 whiteData.data());
    EXPECT_GL_NO_ERROR();

    drawQuad(program, "position", 0.5f);
    EXPECT_PIXEL_COLOR_EQ(getWindowWidth() / 2, getWindowHeight() / 2, angle::GLColor::white);
}

// Draw a quad with an integer texture with a non-zero base level, and test that the color of the
// texture is output.
TEST_P(Texture2DIntegerTestES3, IntegerTextureNonZeroBaseLevel)
{
    // http://anglebug.com/3478
    ANGLE_SKIP_TEST_IF(IsWindows() && IsAMD() && IsDesktopOpenGL());

    glActiveTexture(GL_TEXTURE0);
    glBindTexture(GL_TEXTURE_2D, mTexture2D);
    int width     = getWindowWidth();
    int height    = getWindowHeight();
    GLColor color = GLColor::green;
    std::vector<GLColor> pixels(width * height, color);
    GLint baseLevel = 1;
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_BASE_LEVEL, baseLevel);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
    glTexImage2D(GL_TEXTURE_2D, baseLevel, GL_RGBA8UI, width, height, 0, GL_RGBA_INTEGER,
                 GL_UNSIGNED_BYTE, pixels.data());

    setUpProgram();
    glUseProgram(mProgram);
    glUniform1i(mTexture2DUniformLocation, 0);
    drawQuad(mProgram, "position", 0.5f);

    EXPECT_GL_NO_ERROR();
    EXPECT_PIXEL_COLOR_EQ(0, 0, color);
    EXPECT_PIXEL_COLOR_EQ(width - 1, height - 1, color);
}

// Draw a quad with an integer cube texture with a non-zero base level, and test that the color of
// the texture is output.
TEST_P(TextureCubeIntegerTestES3, IntegerCubeTextureNonZeroBaseLevel)
{
    // All output checks returned black, rather than the texture color.
    ANGLE_SKIP_TEST_IF(IsOSX() && IsOpenGL());

    glActiveTexture(GL_TEXTURE0);

    glBindTexture(GL_TEXTURE_CUBE_MAP, mTextureCube);
    GLint baseLevel = 1;
    int width       = getWindowWidth();
    int height      = getWindowHeight();
    GLColor color   = GLColor::green;
    std::vector<GLColor> pixels(width * height, color);
    for (GLenum faceIndex = 0; faceIndex < 6; faceIndex++)
    {
        glTexImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_X + faceIndex, baseLevel, GL_RGBA8UI, width,
                     height, 0, GL_RGBA_INTEGER, GL_UNSIGNED_BYTE, pixels.data());
        EXPECT_GL_NO_ERROR();
    }
    glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_BASE_LEVEL, baseLevel);
    glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
    glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_MAG_FILTER, GL_NEAREST);

    glUseProgram(mProgram);
    glUniform1i(mTextureCubeUniformLocation, 0);
    drawQuad(mProgram, "position", 0.5f);

    EXPECT_GL_NO_ERROR();
    EXPECT_PIXEL_COLOR_EQ(0, 0, color);
    EXPECT_PIXEL_COLOR_EQ(width - 1, 0, color);
    EXPECT_PIXEL_COLOR_EQ(0, height - 1, color);
    EXPECT_PIXEL_COLOR_EQ(width - 1, height - 1, color);
}

// This test sets up a cube map with four distincly colored MIP levels.
// The size of the texture and the geometry is chosen such that levels 1 or 2 should be chosen at
// the corners of the screen.
TEST_P(TextureCubeIntegerEdgeTestES3, IntegerCubeTextureCorner)
{
    glActiveTexture(GL_TEXTURE0);

    glBindTexture(GL_TEXTURE_CUBE_MAP, mTextureCube);
    int width  = getWindowWidth();
    int height = getWindowHeight();
    ASSERT_EQ(width, height);
    GLColor color[4] = {GLColor::white, GLColor::green, GLColor::blue, GLColor::red};
    for (GLint level = 0; level < 4; level++)
    {
        for (GLenum faceIndex = 0; faceIndex < 6; faceIndex++)
        {
            int levelWidth  = (2 * width) >> level;
            int levelHeight = (2 * height) >> level;
            std::vector<GLColor> pixels(levelWidth * levelHeight, color[level]);
            glTexImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_X + faceIndex, level, GL_RGBA8UI, levelWidth,
                         levelHeight, 0, GL_RGBA_INTEGER, GL_UNSIGNED_BYTE, pixels.data());
            EXPECT_GL_NO_ERROR();
        }
    }
    glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_MIN_FILTER, GL_NEAREST_MIPMAP_NEAREST);
    glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
    glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_MAX_LEVEL, 3);

    glUseProgram(mProgram);
    glUniform1i(mTextureCubeUniformLocation, 0);
    drawQuad(mProgram, "position", 0.5f);

    ASSERT_GL_NO_ERROR();
    // Check that we do not read from levels 0 or 3. Levels 1 and 2 are both acceptable.
    EXPECT_EQ(ReadColor(0, 0).R, 0);
    EXPECT_EQ(ReadColor(width - 1, 0).R, 0);
    EXPECT_EQ(ReadColor(0, height - 1).R, 0);
    EXPECT_EQ(ReadColor(width - 1, height - 1).R, 0);
}

// Draw a quad with an integer texture with a non-zero base level, and test that the color of the
// texture is output.
TEST_P(Texture2DIntegerProjectiveOffsetTestES3, NonZeroBaseLevel)
{
    // Fails on AMD: http://crbug.com/967796
    ANGLE_SKIP_TEST_IF(IsAMD() && IsWindows() && IsOpenGL());

    glActiveTexture(GL_TEXTURE0);
    glBindTexture(GL_TEXTURE_2D, mTexture2D);
    int width     = getWindowWidth();
    int height    = getWindowHeight();
    GLColor color = GLColor::green;
    std::vector<GLColor> pixels(width * height, color);
    GLint baseLevel = 1;
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_BASE_LEVEL, baseLevel);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
    glTexImage2D(GL_TEXTURE_2D, baseLevel, GL_RGBA8UI, width, height, 0, GL_RGBA_INTEGER,
                 GL_UNSIGNED_BYTE, pixels.data());

    setUpProgram();
    glUseProgram(mProgram);
    glUniform1i(mTexture2DUniformLocation, 0);
    drawQuad(mProgram, "position", 0.5f);

    EXPECT_GL_NO_ERROR();
    EXPECT_PIXEL_COLOR_EQ(0, 0, color);
    EXPECT_PIXEL_COLOR_EQ(width - 1, height - 1, color);
}

// Draw a quad with an integer texture with a non-zero base level, and test that the color of the
// texture is output.
TEST_P(Texture2DArrayIntegerTestES3, NonZeroBaseLevel)
{
    glActiveTexture(GL_TEXTURE0);
    glBindTexture(GL_TEXTURE_2D_ARRAY, m2DArrayTexture);
    int width     = getWindowWidth();
    int height    = getWindowHeight();
    int depth     = 2;
    GLColor color = GLColor::green;
    std::vector<GLColor> pixels(width * height * depth, color);
    GLint baseLevel = 1;
    glTexImage3D(GL_TEXTURE_2D_ARRAY, baseLevel, GL_RGBA8UI, width, height, depth, 0,
                 GL_RGBA_INTEGER, GL_UNSIGNED_BYTE, pixels.data());
    glTexParameteri(GL_TEXTURE_2D_ARRAY, GL_TEXTURE_BASE_LEVEL, baseLevel);
    glTexParameteri(GL_TEXTURE_2D_ARRAY, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
    glTexParameteri(GL_TEXTURE_2D_ARRAY, GL_TEXTURE_MIN_FILTER, GL_NEAREST);

    drawQuad(mProgram, "position", 0.5f);

    EXPECT_GL_NO_ERROR();
    EXPECT_PIXEL_COLOR_EQ(0, 0, color);
    EXPECT_PIXEL_COLOR_EQ(width - 1, height - 1, color);
}

// Draw a quad with an integer 3D texture with a non-zero base level, and test that the color of the
// texture is output.
TEST_P(Texture3DIntegerTestES3, NonZeroBaseLevel)
{
    glActiveTexture(GL_TEXTURE0);
    glBindTexture(GL_TEXTURE_3D, mTexture3D);
    int width     = getWindowWidth();
    int height    = getWindowHeight();
    int depth     = 2;
    GLColor color = GLColor::green;
    std::vector<GLColor> pixels(width * height * depth, color);
    GLint baseLevel = 1;
    glTexImage3D(GL_TEXTURE_3D, baseLevel, GL_RGBA8UI, width, height, depth, 0, GL_RGBA_INTEGER,
                 GL_UNSIGNED_BYTE, pixels.data());
    glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_BASE_LEVEL, baseLevel);
    glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
    glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);

    drawQuad(mProgram, "position", 0.5f);

    EXPECT_GL_NO_ERROR();
    EXPECT_PIXEL_COLOR_EQ(0, 0, color);
    EXPECT_PIXEL_COLOR_EQ(width - 1, height - 1, color);
}

// Use this to select which configurations (e.g. which renderer, which GLES major version) these
// tests should be run against.
ANGLE_INSTANTIATE_TEST(Texture2DTest,
                       ES2_D3D9(),
                       ES2_D3D11(),
                       ES2_OPENGL(),
                       ES2_OPENGLES(),
                       ES2_VULKAN());
ANGLE_INSTANTIATE_TEST(TextureCubeTest,
                       ES2_D3D9(),
                       ES2_D3D11(),
                       ES2_OPENGL(),
                       ES2_OPENGLES(),
                       ES2_VULKAN());
ANGLE_INSTANTIATE_TEST(Texture2DTestWithDrawScale,
                       ES2_D3D9(),
                       ES2_D3D11(),
                       ES2_OPENGL(),
                       ES2_OPENGLES(),
                       ES2_VULKAN());
ANGLE_INSTANTIATE_TEST(Sampler2DAsFunctionParameterTest,
                       ES2_D3D9(),
                       ES2_D3D11(),
                       ES2_OPENGL(),
                       ES2_OPENGLES(),
                       ES2_VULKAN());
ANGLE_INSTANTIATE_TEST(SamplerArrayTest,
                       ES2_D3D9(),
                       ES2_D3D11(),
                       ES2_OPENGL(),
                       ES2_OPENGLES(),
                       ES2_VULKAN());
ANGLE_INSTANTIATE_TEST(SamplerArrayAsFunctionParameterTest,
                       ES2_D3D9(),
                       ES2_D3D11(),
                       ES2_OPENGL(),
                       ES2_OPENGLES(),
                       ES2_VULKAN());
ANGLE_INSTANTIATE_TEST(Texture2DTestES3, ES3_D3D11(), ES3_OPENGL(), ES3_OPENGLES(), ES3_VULKAN());
ANGLE_INSTANTIATE_TEST(Texture3DTestES3, ES3_D3D11(), ES3_OPENGL(), ES3_OPENGLES(), ES3_VULKAN());
ANGLE_INSTANTIATE_TEST(Texture2DIntegerAlpha1TestES3,
                       ES3_D3D11(),
                       ES3_OPENGL(),
                       ES3_OPENGLES(),
                       ES3_VULKAN());
ANGLE_INSTANTIATE_TEST(Texture2DUnsignedIntegerAlpha1TestES3,
                       ES3_D3D11(),
                       ES3_OPENGL(),
                       ES3_OPENGLES(),
                       ES3_VULKAN());
ANGLE_INSTANTIATE_TEST(ShadowSamplerPlusSampler3DTestES3,
                       ES3_D3D11(),
                       ES3_OPENGL(),
                       ES3_OPENGLES());
ANGLE_INSTANTIATE_TEST(SamplerTypeMixTestES3,
                       ES3_D3D11(),
                       ES3_OPENGL(),
                       ES3_OPENGLES(),
                       ES3_VULKAN());
ANGLE_INSTANTIATE_TEST(Texture2DArrayTestES3,
                       ES3_D3D11(),
                       ES3_OPENGL(),
                       ES3_OPENGLES(),
                       ES3_VULKAN());
ANGLE_INSTANTIATE_TEST(TextureSizeTextureArrayTest, ES3_D3D11(), ES3_OPENGL(), ES3_VULKAN());
ANGLE_INSTANTIATE_TEST(SamplerInStructTest,
                       ES2_D3D11(),
                       ES2_D3D9(),
                       ES2_OPENGL(),
                       ES2_OPENGLES(),
                       ES2_VULKAN());
ANGLE_INSTANTIATE_TEST(SamplerInStructAsFunctionParameterTest,
                       ES2_D3D11(),
                       ES2_D3D9(),
                       ES2_OPENGL(),
                       ES2_OPENGLES(),
                       ES2_VULKAN());
ANGLE_INSTANTIATE_TEST(SamplerInStructArrayAsFunctionParameterTest,
                       ES2_D3D11(),
                       ES2_D3D9(),
                       ES2_OPENGL(),
                       ES2_OPENGLES(),
                       ES2_VULKAN());
ANGLE_INSTANTIATE_TEST(SamplerInNestedStructAsFunctionParameterTest,
                       ES2_D3D11(),
                       ES2_D3D9(),
                       ES2_OPENGL(),
                       ES2_OPENGLES(),
                       ES2_VULKAN());
ANGLE_INSTANTIATE_TEST(SamplerInStructAndOtherVariableTest,
                       ES2_D3D11(),
                       ES2_D3D9(),
                       ES2_OPENGL(),
                       ES2_OPENGLES(),
                       ES2_VULKAN());
ANGLE_INSTANTIATE_TEST(TextureAnisotropyTest,
                       ES2_D3D11(),
                       ES2_D3D9(),
                       ES2_OPENGL(),
                       ES2_OPENGLES(),
                       ES2_VULKAN());
ANGLE_INSTANTIATE_TEST(TextureBorderClampTest,
                       ES2_D3D11(),
                       ES2_D3D9(),
                       ES2_OPENGL(),
                       ES2_OPENGLES(),
                       ES2_VULKAN());
ANGLE_INSTANTIATE_TEST(TextureBorderClampTestES3, ES3_D3D11(), ES3_OPENGL(), ES3_OPENGLES());
ANGLE_INSTANTIATE_TEST(TextureBorderClampIntegerTestES3, ES3_D3D11(), ES3_OPENGL(), ES3_OPENGLES());
ANGLE_INSTANTIATE_TEST(TextureLimitsTest, ES2_D3D11(), ES2_OPENGL(), ES2_OPENGLES(), ES2_VULKAN());
ANGLE_INSTANTIATE_TEST(Texture2DNorm16TestES3, ES3_D3D11(), ES3_OPENGL(), ES3_OPENGLES());
ANGLE_INSTANTIATE_TEST(Texture2DRGTest,
                       ES2_D3D11(),
                       ES3_D3D11(),
                       ES2_OPENGL(),
                       ES3_OPENGL(),
                       ES2_OPENGLES(),
                       ES3_OPENGLES(),
                       ES2_VULKAN(),
                       ES3_VULKAN());
ANGLE_INSTANTIATE_TEST(Texture2DFloatTestES3,
                       ES3_D3D11(),
                       ES3_OPENGL(),
                       ES3_OPENGLES(),
                       ES3_VULKAN());
ANGLE_INSTANTIATE_TEST(Texture2DFloatTestES2,
                       ES2_D3D11(),
                       ES2_OPENGL(),
                       ES2_OPENGLES(),
                       ES2_VULKAN());
ANGLE_INSTANTIATE_TEST(TextureCubeTestES3, ES3_D3D11(), ES3_OPENGL(), ES3_OPENGLES(), ES3_VULKAN());
ANGLE_INSTANTIATE_TEST(Texture2DIntegerTestES3, ES3_D3D11(), ES3_OPENGL(), ES3_VULKAN());
ANGLE_INSTANTIATE_TEST(TextureCubeIntegerTestES3, ES3_D3D11(), ES3_OPENGL(), ES3_VULKAN());
ANGLE_INSTANTIATE_TEST(TextureCubeIntegerEdgeTestES3, ES3_D3D11(), ES3_OPENGL());
ANGLE_INSTANTIATE_TEST(Texture2DIntegerProjectiveOffsetTestES3,
                       ES3_D3D11(),
                       ES3_OPENGL(),
                       ES3_VULKAN());
ANGLE_INSTANTIATE_TEST(Texture2DArrayIntegerTestES3, ES3_D3D11(), ES3_OPENGL(), ES3_VULKAN());
ANGLE_INSTANTIATE_TEST(Texture3DIntegerTestES3, ES3_D3D11(), ES3_OPENGL(), ES3_VULKAN());
ANGLE_INSTANTIATE_TEST(Texture2DDepthTest,
                       ES2_D3D9(),
                       ES2_D3D11(),
                       ES2_OPENGL(),
                       ES2_OPENGLES(),
                       ES2_VULKAN(),
                       ES3_VULKAN());

}  // anonymous namespace
kc3-lang/angle/src/tests/gl_tests/TextureTest.cpp

Commit

kc3-lang/angle /src/tests/gl_tests/TextureTest.cpp
