TextureTest.cpp

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Author : Austin Kinross
Date : 2014-12-22 12:56:07
Hash : 215b37a6
Message : Work around zero-LOD mipmap issue on D3D11 Feature Level 9_3 In OpenGL ES, it is possible to sample from level 0 of a mipmapped texture by setting GL_TEXTURE_MIN_FILTER to GL_NEAREST. This is possible in D3D9 and D3D11 Feature Level 10_0+ via various methods. It's not possible in D3D11 Feature Level 9_3, though. This change works around this restriction by creating two copies of each texture on 9_3. The textures are identical, except one has mipmaps and one doesn't. The D3D11 renderer figures out which texture to use at the right time, and keeps the textures in sync with each other as necessary. Note: each texture is only created when it's needed. It's possible that only one (or even neither) D3D texture will be created for a given GL texture. Change-Id: I3c17137b4f63b9158b3abf067ad8e5d5c49d2191 Reviewed-on: https://chromium-review.googlesource.com/234522 Tested-by: Austin Kinross <aukinros@microsoft.com> Reviewed-by: Jamie Madill <jmadill@chromium.org>

tests/angle_tests/TextureTest.cpp

#include "ANGLETest.h"

// Use this to select which configurations (e.g. which renderer, which GLES major version) these tests should be run against.
ANGLE_TYPED_TEST_CASE(TextureTest, ES2_D3D9, ES2_D3D11);

template<typename T>
class TextureTest : public ANGLETest
{
protected:
    TextureTest() : ANGLETest(T::GetGlesMajorVersion(), T::GetPlatform())
    {
        setWindowWidth(128);
        setWindowHeight(128);
        setConfigRedBits(8);
        setConfigGreenBits(8);
        setConfigBlueBits(8);
        setConfigAlphaBits(8);
    }

    virtual void SetUp()
    {
        ANGLETest::SetUp();
        glGenTextures(1, &mTexture2D);
        glGenTextures(1, &mTextureCube);

        glBindTexture(GL_TEXTURE_2D, mTexture2D);
        glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 1, 1, 0, GL_RGBA, GL_UNSIGNED_BYTE, NULL);
        EXPECT_GL_NO_ERROR();

        glBindTexture(GL_TEXTURE_CUBE_MAP, mTextureCube);
        glTexStorage2DEXT(GL_TEXTURE_CUBE_MAP, 1, GL_RGBA8, 1, 1);
        EXPECT_GL_NO_ERROR();

        ASSERT_GL_NO_ERROR();

        const std::string vertexShaderSource = SHADER_SOURCE
        (
            precision highp float;
            attribute vec4 position;
            varying vec2 texcoord;

            uniform vec2 textureScale;

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

        const std::string fragmentShaderSource2D = SHADER_SOURCE
        (
            precision highp float;
            uniform sampler2D tex;
            varying vec2 texcoord;

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

        const std::string fragmentShaderSourceCube = SHADER_SOURCE
        (
            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));
            }
        );

        m2DProgram = CompileProgram(vertexShaderSource, fragmentShaderSource2D);
        mCubeProgram = CompileProgram(vertexShaderSource, fragmentShaderSourceCube);
        if (m2DProgram == 0 || mCubeProgram == 0)
        {
            FAIL() << "shader compilation failed.";
        }

        mTexture2DUniformLocation = glGetUniformLocation(m2DProgram, "tex");
        ASSERT_NE(-1, mTexture2DUniformLocation);

        mTextureScaleUniformLocation = glGetUniformLocation(m2DProgram, "textureScale");
        ASSERT_NE(-1, mTextureScaleUniformLocation);

        glUseProgram(m2DProgram);
        glUniform2f(mTextureScaleUniformLocation, 1.0f, 1.0f);
        glUseProgram(0);
        ASSERT_GL_NO_ERROR();
    }

    virtual void TearDown()
    {
        glDeleteTextures(1, &mTexture2D);
        glDeleteTextures(1, &mTextureCube);
        glDeleteProgram(m2DProgram);
        glDeleteProgram(mCubeProgram);

        ANGLETest::TearDown();
    }

    GLuint mTexture2D;
    GLuint mTextureCube;

    GLuint m2DProgram;
    GLuint mCubeProgram;
    GLint mTexture2DUniformLocation;
    GLint mTextureScaleUniformLocation;
};

TYPED_TEST(TextureTest, NegativeAPISubImage)
{
    glBindTexture(GL_TEXTURE_2D, mTexture2D);
    EXPECT_GL_ERROR(GL_NO_ERROR);

    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);
}

TYPED_TEST(TextureTest, ZeroSizedUploads)
{
    glBindTexture(GL_TEXTURE_2D, mTexture2D);
    EXPECT_GL_ERROR(GL_NO_ERROR);

    // Use the texture first to make sure it's in video memory
    glUseProgram(m2DProgram);
    glUniform1i(mTexture2DUniformLocation, 0);
    drawQuad(m2DProgram, "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
TYPED_TEST(TextureTest, 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(mCubeProgram);
    GLint tex2DUniformLocation = glGetUniformLocation(mCubeProgram, "tex2D");
    GLint texCubeUniformLocation = glGetUniformLocation(mCubeProgram, "texCube");
    EXPECT_NE(-1, tex2DUniformLocation);
    EXPECT_NE(-1, texCubeUniformLocation);
    glUniform1i(tex2DUniformLocation, 0);
    glUniform1i(texCubeUniformLocation, 1);
    drawQuad(mCubeProgram, "position", 0.5f);
    EXPECT_GL_NO_ERROR();
}

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

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

    // Fill with red
    std::vector<GLubyte> pixels(4 * 16 * 16);
    for (size_t pixelId = 0; pixelId < 16 * 16; ++pixelId)
    {
        pixels[pixelId * 4 + 0] = 255;
        pixels[pixelId * 4 + 1] = 0;
        pixels[pixelId * 4 + 2] = 0;
        pixels[pixelId * 4 + 3] = 255;
    }

    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 16, 16, 0, GL_RGBA, GL_UNSIGNED_BYTE, pixels.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(m2DProgram);
    glUniform1i(mTexture2DUniformLocation, 0);
    glUniform2f(mTextureScaleUniformLocation, 0.0625f, 0.0625f);
    drawQuad(m2DProgram, "position", 0.5f);
    EXPECT_GL_NO_ERROR();
    EXPECT_PIXEL_EQ(px, py, 255, 0, 0, 255);

    // Fill with blue
    for (size_t pixelId = 0; pixelId < 16 * 16; ++pixelId)
    {
        pixels[pixelId * 4 + 0] = 0;
        pixels[pixelId * 4 + 1] = 0;
        pixels[pixelId * 4 + 2] = 255;
        pixels[pixelId * 4 + 3] = 255;
    }

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

    // Fill with green
    for (size_t pixelId = 0; pixelId < 16 * 16; ++pixelId)
    {
        pixels[pixelId * 4 + 0] = 0;
        pixels[pixelId * 4 + 1] = 255;
        pixels[pixelId * 4 + 2] = 0;
        pixels[pixelId * 4 + 3] = 255;
    }

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

    drawQuad(m2DProgram, "position", 0.5f);

    EXPECT_GL_NO_ERROR();
    EXPECT_PIXEL_EQ(px, py, 0, 255, 0, 255);
}

// 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
TYPED_TEST(TextureTest, CubeMapFBO)
{
    GLuint fbo;
    glGenFramebuffers(1, &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_EQ(GL_FRAMEBUFFER_COMPLETE, glCheckFramebufferStatus(GL_FRAMEBUFFER));

    glDeleteFramebuffers(1, &fbo);

    EXPECT_GL_NO_ERROR();
}

kc3-lang/angle/tests/angle_tests/TextureTest.cpp

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kc3-lang/angle /tests/angle_tests/TextureTest.cpp