MaxTextureSizeTest.cpp

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Author : Jamie Madill
Date : 2016-07-22 22:13:26
Hash : a3944d4f
Message : Add gl::Format to represent a texture/rb/surface format. This has a few advantages: it preserves all the information of the internal format, such as if it is sized or unsized. It also saves looking up the format multiple times in the table, which should improve speed in some cases. The extra sized-ness information will allow us to perform the correct validation in CopyTexSubImage calls. BUG=angleproject:1228 Change-Id: I42954771b0a9a968f5d787b8cf6e0af721791855 Reviewed-on: https://chromium-review.googlesource.com/362626 Reviewed-by: Geoff Lang <geofflang@chromium.org> Commit-Queue: Jamie Madill <jmadill@chromium.org>
src/tests/gl_tests/MaxTextureSizeTest.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"

using namespace angle;

class MaxTextureSizeTest : public ANGLETest
{
  protected:
    MaxTextureSizeTest()
    {
        setWindowWidth(512);
        setWindowHeight(512);
        setConfigRedBits(8);
        setConfigGreenBits(8);
        setConfigBlueBits(8);
        setConfigAlphaBits(8);
    }

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

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

            void main()
            {
                gl_Position = position;
                texcoord = (position.xy * 0.5) + 0.5;
            }
        );

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

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

        const std::string blueFSSource = SHADER_SOURCE
        (
            precision highp float;

            void main()
            {
                gl_FragColor = vec4(0.0, 0.0, 1.0, 1.0);
            }
        );

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

        mTextureUniformLocation = glGetUniformLocation(mTextureProgram, "tex");

        glGetIntegerv(GL_MAX_TEXTURE_SIZE, &mMaxTexture2DSize);
        glGetIntegerv(GL_MAX_CUBE_MAP_TEXTURE_SIZE, &mMaxTextureCubeSize);
        glGetIntegerv(GL_MAX_RENDERBUFFER_SIZE, &mMaxRenderbufferSize);

        ASSERT_GL_NO_ERROR();
    }

    void TearDown() override
    {
        glDeleteProgram(mTextureProgram);
        glDeleteProgram(mBlueProgram);

        ANGLETest::TearDown();
    }

    GLuint mTextureProgram;
    GLint mTextureUniformLocation;

    GLuint mBlueProgram;

    GLint mMaxTexture2DSize;
    GLint mMaxTextureCubeSize;
    GLint mMaxRenderbufferSize;
};

TEST_P(MaxTextureSizeTest, SpecificationTexImage)
{
    GLuint tex;
    glGenTextures(1, &tex);
    glBindTexture(GL_TEXTURE_2D, tex);

    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);

    GLsizei textureWidth = mMaxTexture2DSize;
    GLsizei textureHeight = 64;

    std::vector<GLubyte> data(textureWidth * textureHeight * 4);
    for (int y = 0; y < textureHeight; y++)
    {
        for (int x = 0; x < textureWidth; x++)
        {
            GLubyte* pixel = &data[0] + ((y * textureWidth + x) * 4);

            // Draw a gradient, red in direction, green in y direction
            pixel[0] = static_cast<GLubyte>((float(x) / textureWidth) * 255);
            pixel[1] = static_cast<GLubyte>((float(y) / textureHeight) * 255);
            pixel[2] = 0;
            pixel[3] = 255;
        }
    }

    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, textureWidth, textureHeight, 0, GL_RGBA, GL_UNSIGNED_BYTE, &data[0]);
    EXPECT_GL_NO_ERROR();

    glUseProgram(mTextureProgram);
    glUniform1i(mTextureUniformLocation, 0);

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

    std::vector<GLubyte> pixels(getWindowWidth() * getWindowHeight() * 4);
    glReadPixels(0, 0, getWindowWidth(), getWindowHeight(), GL_RGBA, GL_UNSIGNED_BYTE, &pixels[0]);

    for (int y = 1; y < getWindowHeight(); y++)
    {
        for (int x = 1; x < getWindowWidth(); x++)
        {
            const GLubyte* prevPixel = &pixels[0] + (((y - 1) * getWindowWidth() + (x - 1)) * 4);
            const GLubyte* curPixel = &pixels[0] + ((y * getWindowWidth() + x) * 4);

            EXPECT_GE(curPixel[0], prevPixel[0]);
            EXPECT_GE(curPixel[1], prevPixel[1]);
            EXPECT_EQ(curPixel[2], prevPixel[2]);
            EXPECT_EQ(curPixel[3], prevPixel[3]);
        }
    }
}

TEST_P(MaxTextureSizeTest, SpecificationTexStorage)
{
    if (getClientMajorVersion() < 3 &&
        (!extensionEnabled("GL_EXT_texture_storage") || !extensionEnabled("GL_OES_rgb8_rgba8")))
    {
        return;
    }

    GLuint tex;
    glGenTextures(1, &tex);
    glBindTexture(GL_TEXTURE_2D, tex);

    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);

    GLsizei textureWidth = 64;
    GLsizei textureHeight = mMaxTexture2DSize;

    std::vector<GLubyte> data(textureWidth * textureHeight * 4);
    for (int y = 0; y < textureHeight; y++)
    {
        for (int x = 0; x < textureWidth; x++)
        {
            GLubyte* pixel = &data[0] + ((y * textureWidth + x) * 4);

            // Draw a gradient, red in direction, green in y direction
            pixel[0] = static_cast<GLubyte>((float(x) / textureWidth) * 255);
            pixel[1] = static_cast<GLubyte>((float(y) / textureHeight) * 255);
            pixel[2] = 0;
            pixel[3] = 255;
        }
    }

    if (getClientMajorVersion() < 3)
    {
        glTexStorage2DEXT(GL_TEXTURE_2D, 1, GL_RGBA8_OES, textureWidth, textureHeight);
    }
    else
    {
        glTexStorage2D(GL_TEXTURE_2D, 1, GL_RGBA8_OES, textureWidth, textureHeight);
    }
    EXPECT_GL_NO_ERROR();

    glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, textureWidth, textureHeight, GL_RGBA, GL_UNSIGNED_BYTE, &data[0]);
    EXPECT_GL_NO_ERROR();

    glUseProgram(mTextureProgram);
    glUniform1i(mTextureUniformLocation, 0);

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

    std::vector<GLubyte> pixels(getWindowWidth() * getWindowHeight() * 4);
    glReadPixels(0, 0, getWindowWidth(), getWindowHeight(), GL_RGBA, GL_UNSIGNED_BYTE, &pixels[0]);

    for (int y = 1; y < getWindowHeight(); y++)
    {
        for (int x = 1; x < getWindowWidth(); x++)
        {
            const GLubyte* prevPixel = &pixels[0] + (((y - 1) * getWindowWidth() + (x - 1)) * 4);
            const GLubyte* curPixel = &pixels[0] + ((y * getWindowWidth() + x) * 4);

            EXPECT_GE(curPixel[0], prevPixel[0]);
            EXPECT_GE(curPixel[1], prevPixel[1]);
            EXPECT_EQ(curPixel[2], prevPixel[2]);
            EXPECT_EQ(curPixel[3], prevPixel[3]);
        }
    }
}

TEST_P(MaxTextureSizeTest, RenderToTexture)
{
    if (getClientMajorVersion() < 3 && (!extensionEnabled("GL_ANGLE_framebuffer_blit")))
    {
        std::cout << "Test skipped due to missing glBlitFramebuffer[ANGLE] support." << std::endl;
        return;
    }

    GLuint fbo = 0;
    GLuint textureId = 0;
    // create a 1-level texture at maximum size
    glGenTextures(1, &textureId);
    glBindTexture(GL_TEXTURE_2D, textureId);

    GLsizei textureWidth = 64;
    GLsizei textureHeight = mMaxTexture2DSize;

    // texture setup code
    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_CLAMP_TO_EDGE);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
    glTexImage2D(GL_TEXTURE_2D, 0, GL_BGRA_EXT, textureWidth, textureHeight, 0, GL_BGRA_EXT, GL_UNSIGNED_BYTE, NULL);
    EXPECT_GL_NO_ERROR();

    // create an FBO and attach the texture
    glGenFramebuffers(1, &fbo);
    glBindFramebuffer(GL_FRAMEBUFFER, fbo);
    glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, textureId, 0);

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

    const int frameCount = 64;
    for (int i = 0; i < frameCount; i++)
    {
        // clear the screen
        glBindFramebuffer(GL_FRAMEBUFFER, 0);

        GLubyte clearRed = static_cast<GLubyte>((float(i) / frameCount) * 255);
        GLubyte clearGreen = 255 - clearRed;
        GLubyte clearBlue = 0;

        glClearColor(clearRed / 255.0f, clearGreen / 255.0f, clearBlue / 255.0f, 1.0f);
        glClear(GL_COLOR_BUFFER_BIT);

        // render blue into the texture
        glBindFramebuffer(GL_FRAMEBUFFER, fbo);
        drawQuad(mBlueProgram, "position", 0.5f);

        // copy corner of texture to LL corner of window
        glBindFramebuffer(GL_DRAW_FRAMEBUFFER_ANGLE, 0);
        glBindFramebuffer(GL_READ_FRAMEBUFFER_ANGLE, fbo);
        glBlitFramebufferANGLE(0, 0, textureWidth - 1, getWindowHeight() - 1,
                               0, 0, textureWidth - 1, getWindowHeight() - 1,
                               GL_COLOR_BUFFER_BIT, GL_NEAREST);
        glBindFramebuffer(GL_READ_FRAMEBUFFER_ANGLE, 0);
        EXPECT_GL_NO_ERROR();

        EXPECT_PIXEL_EQ(textureWidth / 2, getWindowHeight() / 2, 0, 0, 255, 255);
        EXPECT_PIXEL_EQ(textureWidth + 10, getWindowHeight() / 2, clearRed, clearGreen, clearBlue, 255);

        swapBuffers();
    }

    glBindFramebuffer(GL_FRAMEBUFFER, 0);
    glBindTexture(GL_TEXTURE_2D, 0);

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

// TODO(geofflang): Fix the dependence on glBlitFramebufferANGLE without checks and assuming the
// default framebuffer is BGRA to enable the GL and GLES backends. (http://anglebug.com/1289)

// Use this to select which configurations (e.g. which renderer, which GLES major version) these tests should be run against.
ANGLE_INSTANTIATE_TEST(MaxTextureSizeTest, ES2_D3D9(), ES2_D3D11(), ES2_D3D11_FL9_3());
kc3-lang/angle/src/tests/gl_tests/MaxTextureSizeTest.cpp

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