IndexBufferOffsetTest.cpp

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Author : Jamie Madill
Date : 2018-12-29 10:29:33
Hash : ba319ba3
Message : Re-land "Load entry points dynamically in tests and samples." Fixes the Android/ChromeOS/Fuchsia builds by using consistent EGL headers. This CL adds a dynamic loader generator based on XML files. It also refactors the entry point generation script to move the XML parsing into a helper class. Additionally this includes a new GLES 1.0 base header. The new header allows for function pointer types and hiding prototypes. All tests and samples now load ANGLE dynamically. In the future this will be extended to load entry points from the driver directly when possible. This will allow us to perform more accurate A/B testing. The new build configuration leads to some tests having more warnings applied. The CL includes fixes for the new warnings. Bug: angleproject:2995 Change-Id: I5a8772f41a0f89570b3736b785f44b7de1539b57 Reviewed-on: https://chromium-review.googlesource.com/c/1392382 Reviewed-by: Jamie Madill <jmadill@chromium.org> Commit-Queue: Jamie Madill <jmadill@chromium.org>

src/tests/gl_tests/IndexBufferOffsetTest.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.
//

// IndexBufferOffsetTest.cpp: Test glDrawElements with an offset and an index buffer

#include "test_utils/ANGLETest.h"
#include "util/system_utils.h"

using namespace angle;

class IndexBufferOffsetTest : public ANGLETest
{
  protected:
    IndexBufferOffsetTest()
    {
        setWindowWidth(128);
        setWindowHeight(128);
        setConfigRedBits(8);
        setConfigGreenBits(8);
        setConfigBlueBits(8);
        setConfigAlphaBits(8);
    }

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

        constexpr char kVS[] =
            R"(precision highp float;
            attribute vec2 position;

            void main()
            {
                gl_Position = vec4(position, 0.0, 1.0);
            })";

        constexpr char kFS[] =
            R"(precision highp float;
            uniform vec4 color;

            void main()
            {
                gl_FragColor = color;
            })";

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

        mColorUniformLocation      = glGetUniformLocation(mProgram, "color");
        mPositionAttributeLocation = glGetAttribLocation(mProgram, "position");

        const GLfloat vertices[] = {-1.0f, -1.0f, -1.0f, 1.0f, 1.0f, -1.0f, 1.0f, 1.0f};
        glGenBuffers(1, &mVertexBuffer);
        glBindBuffer(GL_ARRAY_BUFFER, mVertexBuffer);
        glBufferData(GL_ARRAY_BUFFER, sizeof(vertices), &vertices[0], GL_STATIC_DRAW);

        glGenBuffers(1, &mIndexBuffer);
        glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, mIndexBuffer);
    }

    void TearDown() override
    {
        glDeleteBuffers(1, &mVertexBuffer);
        glDeleteBuffers(1, &mIndexBuffer);
        glDeleteProgram(mProgram);
        ANGLETest::TearDown();
    }

    void runTest(GLenum type, int typeWidth, void *indexData)
    {
        glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
        glClear(GL_COLOR_BUFFER_BIT);

        GLuint nullIndexData[] = {0, 0, 0, 0, 0, 0};

        size_t indexDataWidth = 6 * typeWidth;

        glBufferData(GL_ELEMENT_ARRAY_BUFFER, 3 * indexDataWidth, nullptr, GL_DYNAMIC_DRAW);
        glBufferSubData(GL_ELEMENT_ARRAY_BUFFER, 0, indexDataWidth, nullIndexData);
        glBufferSubData(GL_ELEMENT_ARRAY_BUFFER, indexDataWidth, indexDataWidth, indexData);
        glBufferSubData(GL_ELEMENT_ARRAY_BUFFER, 2 * indexDataWidth, indexDataWidth, nullIndexData);

        glUseProgram(mProgram);

        glBindBuffer(GL_ARRAY_BUFFER, mVertexBuffer);
        glVertexAttribPointer(mPositionAttributeLocation, 2, GL_FLOAT, GL_FALSE, 0, 0);
        glEnableVertexAttribArray(mPositionAttributeLocation);

        glUniform4f(mColorUniformLocation, 1.0f, 0.0f, 0.0f, 1.0f);

        for (int i = 0; i < 16; i++)
        {
            glDrawElements(GL_TRIANGLES, 6, type, reinterpret_cast<void *>(indexDataWidth));
            EXPECT_PIXEL_EQ(64, 64, 255, 0, 0, 255);
        }

        glBufferSubData(GL_ELEMENT_ARRAY_BUFFER, indexDataWidth, indexDataWidth, nullIndexData);
        glBufferSubData(GL_ELEMENT_ARRAY_BUFFER, 2 * indexDataWidth, indexDataWidth, indexData);

        glUniform4f(mColorUniformLocation, 0.0f, 1.0f, 0.0f, 1.0f);
        glDrawElements(GL_TRIANGLES, 6, type, reinterpret_cast<void *>(indexDataWidth * 2));
        EXPECT_PIXEL_EQ(64, 64, 0, 255, 0, 255);

        EXPECT_GL_NO_ERROR();
        swapBuffers();
    }

    GLuint mProgram;
    GLint mColorUniformLocation;
    GLint mPositionAttributeLocation;
    GLuint mVertexBuffer;
    GLuint mIndexBuffer;
};

// Test using an offset for an UInt8 index buffer
TEST_P(IndexBufferOffsetTest, UInt8Index)
{
    GLubyte indexData[] = {0, 1, 2, 1, 2, 3};
    runTest(GL_UNSIGNED_BYTE, 1, indexData);
}

// Test using an offset for an UInt16 index buffer
TEST_P(IndexBufferOffsetTest, UInt16Index)
{
    // TODO(jie.a.chen@intel.com): Re-enable the test once the driver fix is
    // available in public release.
    // http://anglebug.com/2663
    ANGLE_SKIP_TEST_IF(IsIntel() && IsVulkan());

    GLushort indexData[] = {0, 1, 2, 1, 2, 3};
    runTest(GL_UNSIGNED_SHORT, 2, indexData);
}

// Test using an offset for an UInt32 index buffer
TEST_P(IndexBufferOffsetTest, UInt32Index)
{
    ANGLE_SKIP_TEST_IF(getClientMajorVersion() < 3 &&
                       !extensionEnabled("GL_OES_element_index_uint"));

    GLuint indexData[] = {0, 1, 2, 1, 2, 3};
    runTest(GL_UNSIGNED_INT, 4, indexData);
}

// Uses index buffer offset and 2 drawElement calls one of the other, makes sure the second
// drawElement call will use the correct offset.
TEST_P(IndexBufferOffsetTest, DrawAtDifferentOffsets)
{
    GLushort indexData[] = {0, 1, 2, 1, 2, 3};
    glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
    glClear(GL_COLOR_BUFFER_BIT);

    size_t indexDataWidth = 6 * sizeof(GLushort);

    glBufferData(GL_ELEMENT_ARRAY_BUFFER, indexDataWidth, indexData, GL_DYNAMIC_DRAW);
    glUseProgram(mProgram);

    glBindBuffer(GL_ARRAY_BUFFER, mVertexBuffer);
    glVertexAttribPointer(mPositionAttributeLocation, 2, GL_FLOAT, GL_FALSE, 0, 0);
    glEnableVertexAttribArray(mPositionAttributeLocation);

    glUniform4f(mColorUniformLocation, 1.0f, 0.0f, 0.0f, 1.0f);

    glDrawElements(GL_TRIANGLES, 3, GL_UNSIGNED_SHORT, 0);
    glDrawElements(GL_TRIANGLES, 3, GL_UNSIGNED_SHORT,
                   reinterpret_cast<void *>(indexDataWidth / 2));

    // Check the upper left triangle
    EXPECT_PIXEL_COLOR_EQ(0, getWindowHeight() / 4, GLColor::red);

    // Check the down right triangle
    EXPECT_PIXEL_COLOR_EQ(getWindowWidth() - 1, getWindowHeight() - 1, GLColor::red);

    EXPECT_GL_NO_ERROR();
}

// Uses index buffer offset and 2 drawElement calls one of the other with different counts,
// makes sure the second drawElement call will have its data available.
TEST_P(IndexBufferOffsetTest, DrawWithDifferentCountsSameOffset)
{
    GLubyte indexData[] = {99, 0, 1, 2, 1, 2, 3};
    glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
    glClear(GL_COLOR_BUFFER_BIT);

    size_t indexDataWidth = 7 * sizeof(GLubyte);

    glBufferData(GL_ELEMENT_ARRAY_BUFFER, indexDataWidth, indexData, GL_DYNAMIC_DRAW);
    glUseProgram(mProgram);

    glBindBuffer(GL_ARRAY_BUFFER, mVertexBuffer);
    glVertexAttribPointer(mPositionAttributeLocation, 2, GL_FLOAT, GL_FALSE, 0, 0);
    glEnableVertexAttribArray(mPositionAttributeLocation);

    glUniform4f(mColorUniformLocation, 1.0f, 0.0f, 0.0f, 1.0f);

    // The first draw draws the first triangle, and the second draws a quad.
    glDrawElements(GL_TRIANGLES, 3, GL_UNSIGNED_BYTE, reinterpret_cast<void *>(1));
    glDrawElements(GL_TRIANGLES, 6, GL_UNSIGNED_BYTE, reinterpret_cast<void *>(1));

    // Check the upper left triangle
    EXPECT_PIXEL_COLOR_EQ(0, getWindowHeight() / 4, GLColor::red);

    // Check the down right triangle
    EXPECT_PIXEL_COLOR_EQ(getWindowWidth() - 1, getWindowHeight() - 1, GLColor::red);

    EXPECT_GL_NO_ERROR();
}

ANGLE_INSTANTIATE_TEST(IndexBufferOffsetTest,
                       ES2_D3D9(),
                       ES2_D3D11(),
                       ES3_D3D11(),
                       ES2_OPENGL(),
                       ES3_OPENGL(),
                       ES2_OPENGLES(),
                       ES3_OPENGLES(),
                       ES2_VULKAN());

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

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