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

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• Hash : 12a1fe4a
  Author :
  Date : 2019-03-19T10:48:37
  

  Add perf test for fbo clear gpu time
  
  This perf test measures the GPU time spent clearing framebuffers.
  
  Bug: angleproject:2361
  Change-Id: I5dc2e12c08543330f7e2565596b73e9c2f4e53ef
  Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1529864
  Commit-Queue: Shahbaz Youssefi <syoussefi@chromium.org>
  Reviewed-by: Yuly Novikov <ynovikov@chromium.org>
  Reviewed-by: Jamie Madill <jmadill@chromium.org>
  

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• src/tests/perf_tests/ClearPerf.cpp

• //
  // Copyright 2019 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.
  //
  // ClearPerf:
  //   Performance test for clearing framebuffers.
  //
  
  #include "ANGLEPerfTest.h"
  
  #include <iostream>
  #include <random>
  #include <sstream>
  
  #include "test_utils/gl_raii.h"
  #include "util/shader_utils.h"
  
  namespace angle
  {
  constexpr unsigned int kIterationsPerStep = 256;
  
  struct ClearParams final : public RenderTestParams
  {
      ClearParams()
      {
          iterationsPerStep = kIterationsPerStep;
          trackGpuTime      = true;
  
          fboSize     = 2048;
          textureSize = 16;
      }
  
      std::string suffix() const override;
  
      GLsizei fboSize;
      GLsizei textureSize;
  };
  
  std::ostream &operator<<(std::ostream &os, const ClearParams &params)
  {
      os << params.suffix().substr(1);
      return os;
  }
  
  std::string ClearParams::suffix() const
  {
      std::stringstream strstr;
  
      strstr << RenderTestParams::suffix();
  
      return strstr.str();
  }
  
  class ClearBenchmark : public ANGLERenderTest, public ::testing::WithParamInterface<ClearParams>
  {
    public:
      ClearBenchmark();
  
      void initializeBenchmark() override;
      void destroyBenchmark() override;
      void drawBenchmark() override;
  
    private:
      void initShaders();
  
      std::vector<GLuint> mTextures;
  
      GLuint mProgram;
      GLuint mPositionLoc;
      GLuint mSamplerLoc;
  };
  
  ClearBenchmark::ClearBenchmark()
      : ANGLERenderTest("Clear", GetParam()), mProgram(0u), mPositionLoc(-1), mSamplerLoc(-1)
  {}
  
  void ClearBenchmark::initializeBenchmark()
  {
      initShaders();
      glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
      glViewport(0, 0, getWindow()->getWidth(), getWindow()->getHeight());
  
      ASSERT_GL_NO_ERROR();
  }
  
  void ClearBenchmark::initShaders()
  {
      constexpr char kVS[] = R"(attribute vec4 a_position;
  void main()
  {
      gl_Position = a_position;
  })";
  
      constexpr char kFS[] = R"(precision mediump float;
  uniform sampler2D s_texture;
  void main()
  {
      gl_FragColor = texture2D(s_texture, vec2(0, 0));
  })";
  
      mProgram = CompileProgram(kVS, kFS);
      ASSERT_NE(0u, mProgram);
  
      mPositionLoc = glGetAttribLocation(mProgram, "a_position");
      mSamplerLoc  = glGetUniformLocation(mProgram, "s_texture");
      glUseProgram(mProgram);
  
      glDisable(GL_DEPTH_TEST);
  
      ASSERT_GL_NO_ERROR();
  }
  
  void ClearBenchmark::destroyBenchmark()
  {
      glDeleteProgram(mProgram);
  }
  
  void ClearBenchmark::drawBenchmark()
  {
      const auto &params = GetParam();
  
      std::vector<float> textureData(params.textureSize * params.textureSize * 4, 0.5);
  
      GLTexture tex;
  
      glActiveTexture(GL_TEXTURE0);
      glBindTexture(GL_TEXTURE_2D, tex);
  
      glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, params.textureSize, params.textureSize, 0, GL_RGBA,
                   GL_UNSIGNED_BYTE, textureData.data());
  
      glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
      glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
      glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
      glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
  
      glUniform1i(mSamplerLoc, 0);
  
      GLRenderbuffer colorRbo;
      glBindRenderbuffer(GL_RENDERBUFFER, colorRbo);
      glRenderbufferStorage(GL_RENDERBUFFER, GL_RGBA8, params.fboSize, params.fboSize);
  
      GLRenderbuffer depthRbo;
      glBindRenderbuffer(GL_RENDERBUFFER, depthRbo);
      glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH_COMPONENT16, params.fboSize, params.fboSize);
  
      GLFramebuffer fbo;
      glBindFramebuffer(GL_FRAMEBUFFER, fbo);
      glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_RENDERBUFFER, colorRbo);
      glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_RENDERBUFFER, depthRbo);
  
      startGpuTimer();
      for (size_t it = 0; it < params.iterationsPerStep; ++it)
      {
          glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
          glDrawArrays(GL_TRIANGLES, 0, 3);
      }
      stopGpuTimer();
  
      ASSERT_GL_NO_ERROR();
  }
  
  ClearParams ClearD3D11Params()
  {
      ClearParams params;
      params.eglParameters = egl_platform::D3D11();
      return params;
  }
  
  ClearParams ClearOpenGLOrGLESParams()
  {
      ClearParams params;
      params.eglParameters = egl_platform::OPENGL_OR_GLES(false);
      return params;
  }
  
  ClearParams ClearVulkanParams()
  {
      ClearParams params;
      params.eglParameters = egl_platform::VULKAN();
      return params;
  }
  
  TEST_P(ClearBenchmark, Run)
  {
      run();
  }
  
  ANGLE_INSTANTIATE_TEST(ClearBenchmark,
                         ClearD3D11Params(),
                         ClearOpenGLOrGLESParams(),
                         ClearVulkanParams());
  }  // namespace angle
  

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