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

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• Hash : b48e8b07
  Author :
  Date : 2015-04-15T14:26:37
  

  D3D11: Only rewrite for primitive restart when needed.
  
  We would rewrite our index data every draw call. Change the index
  check to see if we're writing to the same sized / typed static
  buffer and only rewrite the data if the user re-uploaded.
  
  Also add a performance test for the primitive restart workaround.
  
  As a future improvement we could avoid creating new D3D objects
  every time we reinitialize static data, since BufferSubData
  calls don't change the size of the buffer if the index type
  remains the same.
  
  BUG=476658
  
  Change-Id: I9d2540ad8b1b34fa0142ba0bf794cf572da8c61d
  Reviewed-on: https://chromium-review.googlesource.com/265838
  Tested-by: Jamie Madill <jmadill@chromium.org>
  Reviewed-by: Geoff Lang <geofflang@chromium.org>
  Reviewed-by: Brandon Jones <bajones@chromium.org>
  

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• src/tests/perf_tests/IndexConversionPerf.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.
  //
  // IndexConversionPerf:
  //   Performance tests for ANGLE index conversion in D3D11.
  //
  
  #include <sstream>
  
  #include "ANGLEPerfTest.h"
  #include "shader_utils.h"
  
  namespace
  {
  
  struct IndexConversionPerfParams final : public RenderTestParams
  {
      std::string suffix() const override
      {
          std::stringstream strstr;
  
          strstr << RenderTestParams::suffix();
  
          return strstr.str();
      }
  
      unsigned int iterations;
      unsigned int numIndexTris;
  };
  
  class IndexConversionPerfTest : public ANGLERenderTest,
                                  public ::testing::WithParamInterface<IndexConversionPerfParams>
  {
    public:
      IndexConversionPerfTest();
  
      void initializeBenchmark() override;
      void destroyBenchmark() override;
      void beginDrawBenchmark() override;
      void drawBenchmark() override;
  
      void updateBufferData();
  
    private:
      GLuint mProgram;
      GLuint mVertexBuffer;
      GLuint mIndexBuffer;
      std::vector<GLushort> mIndexData;
  };
  
  IndexConversionPerfTest::IndexConversionPerfTest()
      : ANGLERenderTest("IndexConversionPerfTest", GetParam()),
        mProgram(0),
        mVertexBuffer(0),
        mIndexBuffer(0)
  {
      mRunTimeSeconds = 3.0;
  }
  
  void IndexConversionPerfTest::initializeBenchmark()
  {
      const auto &params = GetParam();
  
      ASSERT_TRUE(params.iterations > 0);
      ASSERT_TRUE(params.numIndexTris > 0);
  
      mDrawIterations = params.iterations;
  
      const std::string vs = SHADER_SOURCE
      (
          attribute vec2 vPosition;
          uniform float uScale;
          uniform float uOffset;
          void main()
          {
              gl_Position = vec4(vPosition * vec2(uScale) - vec2(uOffset), 0, 1);
          }
      );
  
      const std::string fs = SHADER_SOURCE
      (
          precision mediump float;
          void main()
          {
              gl_FragColor = vec4(1.0, 0.0, 0.0, 1.0);
          }
      );
  
      mProgram = CompileProgram(vs, fs);
      ASSERT_TRUE(mProgram != 0);
  
      // Use the program object
      glUseProgram(mProgram);
  
      glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
  
      // Initialize the vertex data
      std::vector<GLfloat> floatData;
  
      size_t numTris = std::numeric_limits<GLushort>::max() / 3 + 1;
      for (size_t triIndex = 0; triIndex < numTris; ++triIndex)
      {
          floatData.push_back(1);
          floatData.push_back(2);
          floatData.push_back(0);
          floatData.push_back(0);
          floatData.push_back(2);
          floatData.push_back(0);
      }
  
      glGenBuffers(1, &mVertexBuffer);
      glBindBuffer(GL_ARRAY_BUFFER, mVertexBuffer);
      glBufferData(GL_ARRAY_BUFFER, floatData.size() * sizeof(GLfloat), &floatData[0], GL_STATIC_DRAW);
  
      glVertexAttribPointer(0, 2, GL_FLOAT, GL_FALSE, 0, 0);
      glEnableVertexAttribArray(0);
  
      // Initialize the index buffer
      for (unsigned int triIndex = 0; triIndex < params.numIndexTris; ++triIndex)
      {
          mIndexData.push_back(std::numeric_limits<GLushort>::max());
          mIndexData.push_back(1);
          mIndexData.push_back(2);
      }
  
      glGenBuffers(1, &mIndexBuffer);
      glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, mIndexBuffer);
      updateBufferData();
  
      // Set the viewport
      glViewport(0, 0, getWindow()->getWidth(), getWindow()->getHeight());
  
      GLfloat scale = 0.5f;
      GLfloat offset = 0.5f;
  
      glUniform1f(glGetUniformLocation(mProgram, "uScale"), scale);
      glUniform1f(glGetUniformLocation(mProgram, "uOffset"), offset);
  
      ASSERT_TRUE(glGetError() == GL_NO_ERROR);
  }
  
  void IndexConversionPerfTest::updateBufferData()
  {
      glBufferData(GL_ELEMENT_ARRAY_BUFFER, mIndexData.size() * sizeof(mIndexData[0]), &mIndexData[0], GL_STATIC_DRAW);
  }
  
  void IndexConversionPerfTest::destroyBenchmark()
  {
      glDeleteProgram(mProgram);
      glDeleteBuffers(1, &mVertexBuffer);
      glDeleteBuffers(1, &mIndexBuffer);
  }
  
  void IndexConversionPerfTest::beginDrawBenchmark()
  {
      // Clear the color buffer
      glClear(GL_COLOR_BUFFER_BIT);
  }
  
  void IndexConversionPerfTest::drawBenchmark()
  {
      const auto &params = GetParam();
  
      // Trigger an update to ensure we convert once a frame
      updateBufferData();
  
      for (unsigned int it = 0; it < params.iterations; it++)
      {
          glDrawElements(GL_TRIANGLES,
                         static_cast<GLsizei>(params.numIndexTris * 3 - 1),
                         GL_UNSIGNED_SHORT,
                         reinterpret_cast<GLvoid*>(0));
      }
  
      EXPECT_TRUE(glGetError() == GL_NO_ERROR);
  }
  
  IndexConversionPerfParams IndexConversionPerfD3D11Params()
  {
      IndexConversionPerfParams params;
      params.glesMajorVersion = 2;
      params.widowWidth = 256;
      params.windowHeight = 256;
      params.requestedRenderer = EGL_PLATFORM_ANGLE_TYPE_D3D11_ANGLE;
      params.deviceType = EGL_PLATFORM_ANGLE_DEVICE_TYPE_NULL_ANGLE;
      params.iterations = 15;
      params.numIndexTris = 3000;
      return params;
  }
  
  TEST_P(IndexConversionPerfTest, Run)
  {
      run();
  }
  
  INSTANTIATE_TEST_CASE_P(IndexConversionPerf,
                          IndexConversionPerfTest,
                          ::testing::Values(IndexConversionPerfD3D11Params()));
  
  } // namespace
  

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