CopyTexImageTest.cpp

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Author : Martin Radev
Date : 2016-07-21 10:15:04
Hash : 1fc7493e
Message : Fix TearDown incorrect order in ReadPixelsTest The ANGLETest::TearDown() call was set at the beginning of the function where as it should be at the end since it destroys the context. The earlier version would not cause any crashes because the GL function calls would be ignored. BUG=angleproject:1445 TEST=angle_end2end_tests Change-Id: I187cb8fede1db4ef2bfc13ab850594c41e00b0b0 Reviewed-on: https://chromium-review.googlesource.com/362220 Reviewed-by: Olli Etuaho <oetuaho@nvidia.com> Commit-Queue: Olli Etuaho <oetuaho@nvidia.com>
src/tests/gl_tests/CopyTexImageTest.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 "test_utils/ANGLETest.h"

namespace angle
{

class CopyTexImageTest : public ANGLETest
{
  protected:
    CopyTexImageTest()
    {
        setWindowWidth(16);
        setWindowHeight(16);
        setConfigRedBits(8);
        setConfigGreenBits(8);
        setConfigBlueBits(8);
        setConfigAlphaBits(8);
    }

    GLuint createFramebuffer(GLenum format, GLenum type, GLfloat color[4]) const
    {
        GLuint fbo;
        glGenFramebuffers(1, &fbo);
        glBindFramebuffer(GL_FRAMEBUFFER, fbo);

        GLuint texture = createTexture(format, type);
        glBindTexture(GL_TEXTURE_2D, texture);
        glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, texture, 0);

        glClearColor(color[0], color[1], color[2], color[3]);
        glClear(GL_COLOR_BUFFER_BIT);

        return fbo;
    }

    GLuint createTexture(GLenum format, GLenum type) const
    {
        GLuint tex;
        glGenTextures(1, &tex);
        glBindTexture(GL_TEXTURE_2D, tex);
        glTexImage2D(GL_TEXTURE_2D, 0, format, 16, 16, 0, format, type, nullptr);

        // Disable mipmapping
        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);

        return tex;
    }

    GLuint createTextureFromCopyTexImage(GLuint fbo, GLenum format) const
    {
        GLuint tex;
        glGenTextures(1, &tex);
        glBindTexture(GL_TEXTURE_2D, tex);

        glBindFramebuffer(GL_FRAMEBUFFER, fbo);
        glCopyTexImage2D(GL_TEXTURE_2D, 0, format, 0, 0, 16, 16, 0);

        // Disable mipmapping
        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);

        return tex;
    }

    void copyTextureWithCopyTexSubImage(GLuint fbo,
                                        GLuint texture,
                                        GLint xoffset,
                                        GLint yoffset,
                                        GLint x,
                                        GLint y,
                                        GLsizei w,
                                        GLsizei h) const
    {
        glBindTexture(GL_TEXTURE_2D, texture);
        glBindFramebuffer(GL_FRAMEBUFFER, fbo);
        glCopyTexSubImage2D(GL_TEXTURE_2D, 0, xoffset, yoffset, x, y, w, h);
    }

    void SetUp() override
    {
        ANGLETest::SetUp();

        const std::string vsSource =
            "precision highp float;\n"
            "attribute vec4 position;\n"
            "varying vec2 texcoord;\n"
            "\n"
            "void main()\n"
            "{\n"
            "    gl_Position = position;\n"
            "    texcoord = (position.xy * 0.5) + 0.5;\n"
            "    texcoord.y = 1.0 - texcoord.y;\n"
            "}\n";

        const std::string textureFSSource =
            "precision highp float;\n"
            "uniform sampler2D tex;\n"
            "varying vec2 texcoord;\n"
            "\n"
            "void main()\n"
            "{\n"
            "    gl_FragColor = texture2D(tex, texcoord);\n"
            "}\n";

        mTextureProgram = CompileProgram(vsSource, textureFSSource);
        if (mTextureProgram == 0)
        {
            FAIL() << "shader compilation failed.";
        }

        mTextureUniformLocation = glGetUniformLocation(mTextureProgram, "tex");

        ASSERT_GL_NO_ERROR();
    }

    void TearDown() override
    {
        glDeleteProgram(mTextureProgram);

        ANGLETest::TearDown();
    }

    void verifyResults(GLuint texture, GLubyte data[4], GLint x, GLint y)
    {
        glViewport(0, 0, 16, 16);

        glBindFramebuffer(GL_FRAMEBUFFER, 0);

        // Draw a quad with the target texture
        glUseProgram(mTextureProgram);
        glBindTexture(GL_TEXTURE_2D, texture);
        glUniform1i(mTextureUniformLocation, 0);

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

        // Expect that the rendered quad has the same color as the source texture
        EXPECT_PIXEL_NEAR(x, y, data[0], data[1], data[2], data[3], 1.0);
    }

    GLuint mTextureProgram;
    GLint mTextureUniformLocation;
};

TEST_P(CopyTexImageTest, RGBAToL)
{
    GLfloat color[] = {
        0.25f, 1.0f, 0.75f, 0.5f,
    };

    GLuint fbo = createFramebuffer(GL_RGBA, GL_UNSIGNED_BYTE, color);
    GLuint tex = createTextureFromCopyTexImage(fbo, GL_LUMINANCE);

    GLubyte expected[] = {
        64, 64, 64, 255,
    };
    verifyResults(tex, expected, 0, 0);
}

TEST_P(CopyTexImageTest, RGBToL)
{
    // TODO (geofflang): Figure out why CopyTex[Sub]Image doesn't work with
    // RGB->L on older Intel chips
    if (IsIntel() && getPlatformRenderer() == EGL_PLATFORM_ANGLE_TYPE_OPENGL_ANGLE)
    {
        std::cout << "Test skipped on Intel OpenGL." << std::endl;
        return;
    }

    GLfloat color[] = {
        0.25f, 1.0f, 0.75f, 0.5f,
    };

    GLuint fbo = createFramebuffer(GL_RGB, GL_UNSIGNED_BYTE, color);
    GLuint tex = createTextureFromCopyTexImage(fbo, GL_LUMINANCE);

    GLubyte expected[] = {
        64, 64, 64, 255,
    };
    verifyResults(tex, expected, 0, 0);
}

TEST_P(CopyTexImageTest, RGBAToLA)
{
    GLfloat color[] = {
        0.25f, 1.0f, 0.75f, 0.5f,
    };

    GLuint fbo = createFramebuffer(GL_RGBA, GL_UNSIGNED_BYTE, color);
    GLuint tex = createTextureFromCopyTexImage(fbo, GL_LUMINANCE_ALPHA);

    GLubyte expected[] = {
        64, 64, 64, 127,
    };
    verifyResults(tex, expected, 0, 0);
}

TEST_P(CopyTexImageTest, RGBAToA)
{
    GLfloat color[] = {
        0.25f, 1.0f, 0.75f, 0.5f,
    };

    GLuint fbo = createFramebuffer(GL_RGBA, GL_UNSIGNED_BYTE, color);
    GLuint tex = createTextureFromCopyTexImage(fbo, GL_ALPHA);

    GLubyte expected[] = {
        0, 0, 0, 127,
    };
    verifyResults(tex, expected, 0, 0);
}

TEST_P(CopyTexImageTest, SubImageRGBAToL)
{
    GLfloat color0[] = {
        0.25f, 1.0f, 0.75f, 0.5f,
    };
    GLuint fbo0 = createFramebuffer(GL_RGBA, GL_UNSIGNED_BYTE, color0);
    GLuint tex  = createTextureFromCopyTexImage(fbo0, GL_LUMINANCE);

    GLfloat color1[] = {
        0.5f, 0.25f, 1.0f, 0.75f,
    };
    GLuint fbo1 = createFramebuffer(GL_RGBA, GL_UNSIGNED_BYTE, color1);
    copyTextureWithCopyTexSubImage(fbo1, tex, 2, 4, 5, 6, 8, 8);

    GLubyte expected0[] = {
        64, 64, 64, 255,
    };
    verifyResults(tex, expected0, 0, 0);

    GLubyte expected1[] = {
        127, 127, 127, 255,
    };
    verifyResults(tex, expected1, 7, 7);
}

TEST_P(CopyTexImageTest, SubImageRGBAToLA)
{
    GLfloat color0[] = {
        0.25f, 1.0f, 0.75f, 0.5f,
    };
    GLuint fbo0 = createFramebuffer(GL_RGBA, GL_UNSIGNED_BYTE, color0);
    GLuint tex  = createTextureFromCopyTexImage(fbo0, GL_LUMINANCE_ALPHA);

    GLfloat color1[] = {
        0.5f, 0.25f, 1.0f, 0.75f,
    };
    GLuint fbo1 = createFramebuffer(GL_RGBA, GL_UNSIGNED_BYTE, color1);
    copyTextureWithCopyTexSubImage(fbo1, tex, 2, 4, 5, 6, 8, 8);

    GLubyte expected0[] = {
        64, 64, 64, 127,
    };
    verifyResults(tex, expected0, 0, 0);

    GLubyte expected1[] = {
        127, 127, 127, 192,
    };
    verifyResults(tex, expected1, 7, 7);
}

TEST_P(CopyTexImageTest, SubImageRGBToL)
{
    // TODO (geofflang): Figure out why CopyTex[Sub]Image doesn't work with
    // RGB->L on older Intel chips
    if (IsIntel() && getPlatformRenderer() == EGL_PLATFORM_ANGLE_TYPE_OPENGL_ANGLE)
    {
        std::cout << "Test skipped on Intel OpenGL." << std::endl;
        return;
    }

    GLfloat color0[] = {
        0.25f, 1.0f, 0.75f, 0.5f,
    };
    GLuint fbo0 = createFramebuffer(GL_RGB, GL_UNSIGNED_BYTE, color0);
    GLuint tex  = createTextureFromCopyTexImage(fbo0, GL_LUMINANCE);

    GLfloat color1[] = {
        0.5f, 0.25f, 1.0f, 0.75f,
    };
    GLuint fbo1 = createFramebuffer(GL_RGB, GL_UNSIGNED_BYTE, color1);
    copyTextureWithCopyTexSubImage(fbo1, tex, 2, 4, 5, 6, 8, 8);

    GLubyte expected0[] = {
        64, 64, 64, 255,
    };
    verifyResults(tex, expected0, 0, 0);

    GLubyte expected1[] = {
        127, 127, 127, 255,
    };
    verifyResults(tex, expected1, 7, 7);
}

// specialization of CopyTexImageTest is added so that some tests can be explicitly run with an ES3
// context
class CopyTexImageTestES3 : public CopyTexImageTest
{
};

//  The test verifies that glCopyTexSubImage2D generates a GL_INVALID_OPERATION error
//  when the read buffer is GL_NONE.
//  Reference: GLES 3.0.4, Section 3.8.5 Alternate Texture Image Specification Commands
TEST_P(CopyTexImageTestES3, ReadBufferIsNone)
{
    GLfloat color[] = {
        0.25f, 1.0f, 0.75f, 0.5f,
    };

    GLuint fbo = createFramebuffer(GL_RGBA, GL_UNSIGNED_BYTE, color);
    GLuint tex = createTextureFromCopyTexImage(fbo, GL_RGBA);

    glBindFramebuffer(GL_FRAMEBUFFER, fbo);
    glBindTexture(GL_TEXTURE_2D, tex);

    glReadBuffer(GL_NONE);

    EXPECT_GL_NO_ERROR();
    glCopyTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, 0, 0, 4, 4);
    EXPECT_GL_ERROR(GL_INVALID_OPERATION);

    glDeleteFramebuffers(1, &fbo);
    glDeleteTextures(1, &tex);
}

// Use this to select which configurations (e.g. which renderer, which GLES major version) these
// tests should be run against.
ANGLE_INSTANTIATE_TEST(CopyTexImageTest,
                       ES2_D3D9(),
                       ES2_D3D11(EGL_EXPERIMENTAL_PRESENT_PATH_COPY_ANGLE),
                       ES2_D3D11(EGL_EXPERIMENTAL_PRESENT_PATH_FAST_ANGLE),
                       ES2_OPENGL(),
                       ES2_OPENGL(3, 3),
                       ES2_OPENGLES());

ANGLE_INSTANTIATE_TEST(CopyTexImageTestES3, ES3_D3D11(), ES3_OPENGL(), ES3_OPENGLES());
}
kc3-lang/angle/src/tests/gl_tests/CopyTexImageTest.cpp

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kc3-lang/angle /src/tests/gl_tests/CopyTexImageTest.cpp
