TextureSampling.cpp

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Author : Stuart Morgan
Date : 2019-08-14 12:25:12
Hash : 9d737966
Message : Standardize copyright notices to project style For all "ANGLE Project" copyrights, standardize to the format specified by the style guide. Changes: - "Copyright (c)" and "Copyright(c)" changed to just "Copyright". - Removed the second half of date ranges ("Y1Y1-Y2Y2"->"Y1Y1"). - Fixed a small number of files that had no copyright date using the initial commit year from the version control history. - Fixed one instance of copyright being "The ANGLE Project" rather than "The ANGLE Project Authors" These changes are applied both to the copyright of source file, and where applicable to copyright statements that are generated by templates. BUG=angleproject:3811 Change-Id: I973dd65e4ef9deeba232d5be74c768256a0eb2e5 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1754397 Commit-Queue: Jamie Madill <jmadill@chromium.org> Reviewed-by: Jamie Madill <jmadill@chromium.org>

src/tests/perf_tests/TextureSampling.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.
//
// TextureSamplingBenchmark:
//   Performance test for texture sampling. The test generates a texture containing random data
//   and then blurs it in a fragment shader using nearest neighbor sampling. The test is
//   specifically designed to test overhead of GLSL's builtin texture*() functions that may result
//   from how ANGLE translates them on each backend.
//

#include "ANGLEPerfTest.h"

#include <iostream>
#include <random>
#include <sstream>

#include "util/shader_utils.h"

using namespace angle;

namespace
{
constexpr unsigned int kIterationsPerStep = 4;

struct TextureSamplingParams final : public RenderTestParams
{
    TextureSamplingParams()
    {
        iterationsPerStep = kIterationsPerStep;

        // Common default params
        majorVersion = 2;
        minorVersion = 0;
        windowWidth  = 720;
        windowHeight = 720;

        numSamplers = 2;
        textureSize = 32;
        kernelSize  = 3;
    }

    std::string suffix() const override;
    unsigned int numSamplers;
    unsigned int textureSize;
    unsigned int kernelSize;
};

std::ostream &operator<<(std::ostream &os, const TextureSamplingParams &params)
{
    os << params.suffix().substr(1);
    return os;
}

std::string TextureSamplingParams::suffix() const
{
    std::stringstream strstr;

    strstr << RenderTestParams::suffix() << "_" << numSamplers << "samplers";

    return strstr.str();
}

class TextureSamplingBenchmark : public ANGLERenderTest,
                                 public ::testing::WithParamInterface<TextureSamplingParams>
{
  public:
    TextureSamplingBenchmark();

    void initializeBenchmark() override;
    void destroyBenchmark() override;
    void drawBenchmark() override;

  private:
    void initShaders();
    void initVertexBuffer();
    void initTextures();

    GLuint mProgram;
    GLuint mBuffer;
    std::vector<GLuint> mTextures;
};

TextureSamplingBenchmark::TextureSamplingBenchmark()
    : ANGLERenderTest("TextureSampling", GetParam()), mProgram(0u), mBuffer(0u)
{}

void TextureSamplingBenchmark::initializeBenchmark()
{
    const auto &params = GetParam();

    // Verify "numSamplers" is within MAX_TEXTURE_IMAGE_UNITS limit
    GLint maxTextureImageUnits;
    glGetIntegerv(GL_MAX_TEXTURE_IMAGE_UNITS, &maxTextureImageUnits);

    if (params.numSamplers > static_cast<unsigned int>(maxTextureImageUnits))
    {
        FAIL() << "Sampler count (" << params.numSamplers << ")"
               << " exceeds maximum texture count: " << maxTextureImageUnits << std::endl;
    }
    initShaders();
    initVertexBuffer();
    initTextures();
    glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
    glViewport(0, 0, getWindow()->getWidth(), getWindow()->getHeight());

    ASSERT_GL_NO_ERROR();
}

void TextureSamplingBenchmark::initShaders()
{
    const auto &params = GetParam();

    std::stringstream vstrstr;
    vstrstr << "attribute vec2 aPosition;\n"
               "varying vec2 vTextureCoordinates;\n"
               "void main()\n"
               "{\n"
               "    vTextureCoordinates = (aPosition + vec2(1.0)) * 0.5;\n"
               "    gl_Position = vec4(aPosition, 0, 1.0);\n"
               "}";

    std::stringstream fstrstr;
    fstrstr << "precision mediump float;\n"
               "varying vec2 vTextureCoordinates;\n";
    for (unsigned int count = 0; count < params.numSamplers; count++)
    {
        fstrstr << "uniform sampler2D uSampler" << count << ";\n";
    }
    fstrstr << "void main()\n"
               "{\n"
               "    const float inverseTextureSize = 1.0 / "
            << params.textureSize
            << ".0;\n"
               "    vec4 colorOut = vec4(0.0, 0.0, 0.0, 1.0);\n";
    for (unsigned int count = 0; count < params.numSamplers; count++)
    {
        fstrstr << "    for (int x = 0; x < " << params.kernelSize
                << "; ++x)\n"
                   "    {\n"
                   "        for (int y = 0; y < "
                << params.kernelSize
                << "; ++y)\n"
                   "        {\n"
                   "            colorOut += texture2D(uSampler"
                << count
                << ", vTextureCoordinates + vec2(x, y) * inverseTextureSize) * 0.1;\n"
                   "        }\n"
                   "    }\n";
    }
    fstrstr << "    gl_FragColor = colorOut;\n"
               "}\n";

    mProgram = CompileProgram(vstrstr.str().c_str(), fstrstr.str().c_str());
    ASSERT_NE(0u, mProgram);

    // Use the program object
    glUseProgram(mProgram);
}

void TextureSamplingBenchmark::initVertexBuffer()
{
    std::vector<float> vertexPositions(12);
    {
        // Bottom left triangle
        vertexPositions[0] = -1.0f;
        vertexPositions[1] = -1.0f;
        vertexPositions[2] = 1.0f;
        vertexPositions[3] = -1.0f;
        vertexPositions[4] = -1.0f;
        vertexPositions[5] = 1.0f;

        // Top right triangle
        vertexPositions[6]  = -1.0f;
        vertexPositions[7]  = 1.0f;
        vertexPositions[8]  = 1.0f;
        vertexPositions[9]  = -1.0f;
        vertexPositions[10] = 1.0f;
        vertexPositions[11] = 1.0f;
    }

    glGenBuffers(1, &mBuffer);
    glBindBuffer(GL_ARRAY_BUFFER, mBuffer);
    glBufferData(GL_ARRAY_BUFFER, vertexPositions.size() * sizeof(float), &vertexPositions[0],
                 GL_STATIC_DRAW);

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

    glVertexAttribPointer(positionLocation, 2, GL_FLOAT, GL_FALSE, 0, nullptr);
    glEnableVertexAttribArray(positionLocation);
}

void TextureSamplingBenchmark::initTextures()
{
    const auto &params = GetParam();

    unsigned int dataSize = params.textureSize * params.textureSize;
    std::vector<unsigned int> randomTextureData;
    randomTextureData.resize(dataSize);

    unsigned int pseudoRandom = 1u;
    for (unsigned int i = 0; i < dataSize; ++i)
    {
        pseudoRandom         = pseudoRandom * 1664525u + 1013904223u;
        randomTextureData[i] = pseudoRandom;
    }

    mTextures.resize(params.numSamplers);
    glGenTextures(params.numSamplers, mTextures.data());
    for (unsigned int i = 0; i < params.numSamplers; ++i)
    {
        glActiveTexture(GL_TEXTURE0 + i);
        glBindTexture(GL_TEXTURE_2D, mTextures[i]);
        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_MAG_FILTER, GL_NEAREST);
        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
        glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, params.textureSize, params.textureSize, 0, GL_RGBA,
                     GL_UNSIGNED_BYTE, randomTextureData.data());
    }

    for (unsigned int count = 0; count < params.numSamplers; count++)
    {
        std::stringstream samplerstrstr;
        samplerstrstr << "uSampler" << count;
        GLint samplerLocation = glGetUniformLocation(mProgram, samplerstrstr.str().c_str());
        ASSERT_NE(-1, samplerLocation);

        glUniform1i(samplerLocation, count);
    }
}

void TextureSamplingBenchmark::destroyBenchmark()
{
    const auto &params = GetParam();

    glDeleteProgram(mProgram);
    glDeleteBuffers(1, &mBuffer);
    if (!mTextures.empty())
    {
        glDeleteTextures(params.numSamplers, mTextures.data());
    }
}

void TextureSamplingBenchmark::drawBenchmark()
{
    glClear(GL_COLOR_BUFFER_BIT);

    const auto &params = GetParam();

    for (unsigned int it = 0; it < params.iterationsPerStep; ++it)
    {
        glDrawArrays(GL_TRIANGLES, 0, 6);
    }

    ASSERT_GL_NO_ERROR();
}

TextureSamplingParams D3D11Params()
{
    TextureSamplingParams params;
    params.eglParameters = egl_platform::D3D11();
    return params;
}

TextureSamplingParams D3D9Params()
{
    TextureSamplingParams params;
    params.eglParameters = egl_platform::D3D9();
    return params;
}

TextureSamplingParams OpenGLOrGLESParams()
{
    TextureSamplingParams params;
    params.eglParameters = egl_platform::OPENGL_OR_GLES();
    return params;
}

TextureSamplingParams VulkanParams()
{
    TextureSamplingParams params;
    params.eglParameters = egl_platform::VULKAN();
    return params;
}

}  // anonymous namespace

TEST_P(TextureSamplingBenchmark, Run)
{
    run();
}

ANGLE_INSTANTIATE_TEST(TextureSamplingBenchmark,
                       D3D11Params(),
                       D3D9Params(),
                       OpenGLOrGLESParams(),
                       VulkanParams());

kc3-lang/angle/src/tests/perf_tests/TextureSampling.cpp

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kc3-lang/angle /src/tests/perf_tests/TextureSampling.cpp