kc3-lang/angle/tests/perf_tests/TexSubImage.cpp

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• Hash : eac70a31
  Author :
  Date : 2014-10-09T14:13:48
  

  Use JSON as startup parameters to BufferSubData test.
  
  BUG=angle:744
  
  Change-Id: I60287f3c612011f505f1bc20632efc4dd17001d3
  Reviewed-on: https://chromium-review.googlesource.com/221375
  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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• tests/perf_tests/TexSubImage.cpp

• //
  // Copyright (c) 2014 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 "TexSubImage.h"
  
  #include <sstream>
  #include <cassert>
  
  #include "shader_utils.h"
  
  std::string TexSubImageParams::suffix() const
  {
      // TODO(jmadill)
      return BenchmarkParams::suffix();
  }
  
  TexSubImageBenchmark::TexSubImageBenchmark(const TexSubImageParams &params)
      : SimpleBenchmark("TexSubImage", 512, 512, 2, params),
        mParams(params),
        mProgram(0),
        mPositionLoc(-1),
        mTexCoordLoc(-1),
        mSamplerLoc(-1),
        mTexture(0),
        mVertexBuffer(0),
        mIndexBuffer(0),
        mPixels(NULL)
  {
      assert(mParams.iterations > 0);
      mDrawIterations = mParams.iterations;
  }
  
  GLuint TexSubImageBenchmark::createTexture()
  {
      // Use tightly packed data
      glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
  
      // Generate a texture object
      GLuint texture;
      glGenTextures(1, &texture);
  
      // Bind the texture object
      glBindTexture(GL_TEXTURE_2D, texture);
  
      glTexStorage2DEXT(GL_TEXTURE_2D, 1, GL_RGBA8, mParams.imageWidth, mParams.imageHeight);
  
      // Set the filtering mode
      glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
      glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
  
      return texture;
  }
  
  bool TexSubImageBenchmark::initializeBenchmark()
  {
      const std::string vs = SHADER_SOURCE
      (
          attribute vec4 a_position;
          attribute vec2 a_texCoord;
          varying vec2 v_texCoord;
          void main()
          {
              gl_Position = a_position;
              v_texCoord = a_texCoord;
          }
      );
  
      const std::string fs = SHADER_SOURCE
      (
          precision mediump float;
          varying vec2 v_texCoord;
          uniform sampler2D s_texture;
          void main()
          {
              gl_FragColor = texture2D(s_texture, v_texCoord);
          }
      );
  
      mProgram = CompileProgram(vs, fs);
      if (!mProgram)
      {
          return false;
      }
  
      // Get the attribute locations
      mPositionLoc = glGetAttribLocation(mProgram, "a_position");
      mTexCoordLoc = glGetAttribLocation(mProgram, "a_texCoord");
  
      // Get the sampler location
      mSamplerLoc = glGetUniformLocation(mProgram, "s_texture");
  
      // Build the vertex buffer
      GLfloat vertices[] =
      {
          -0.5f, 0.5f, 0.0f,  // Position 0
          0.0f, 0.0f,        // TexCoord 0
          -0.5f, -0.5f, 0.0f,  // Position 1
          0.0f, 1.0f,        // TexCoord 1
          0.5f, -0.5f, 0.0f,  // Position 2
          1.0f, 1.0f,        // TexCoord 2
          0.5f, 0.5f, 0.0f,  // Position 3
          1.0f, 0.0f         // TexCoord 3
      };
  
      glGenBuffers(1, &mVertexBuffer);
      glBindBuffer(GL_ARRAY_BUFFER, mVertexBuffer);
      glBufferData(GL_ARRAY_BUFFER, sizeof(vertices), vertices, GL_STATIC_DRAW);
  
      GLushort indices[] = { 0, 1, 2, 0, 2, 3 };
      glGenBuffers(1, &mIndexBuffer);
      glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, mIndexBuffer);
      glBufferData(GL_ELEMENT_ARRAY_BUFFER, sizeof(indices), indices, GL_STATIC_DRAW);
  
      // Load the texture
      mTexture = createTexture();
  
      glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
  
      mPixels = new GLubyte[mParams.subImageWidth * mParams.subImageHeight * 4];
  
      // Fill the pixels structure with random data:
      for (int y = 0; y < mParams.subImageHeight; ++y)
      {
          for (int x = 0; x < mParams.subImageWidth; ++x)
          {
              int offset = (x + (y * mParams.subImageWidth)) * 4;
              mPixels[offset + 0] = rand() % 255; // Red
              mPixels[offset + 1] = rand() % 255; // Green
              mPixels[offset + 2] = rand() % 255; // Blue
              mPixels[offset + 3] = 255; // Alpha
          }
      }
  
      return true;
  }
  
  void TexSubImageBenchmark::destroyBenchmark()
  {
      // print static parameters
      printResult("image_width", static_cast<size_t>(mParams.imageWidth), "pix", false);
      printResult("image_height", static_cast<size_t>(mParams.imageHeight), "pix", false);
      printResult("subimage_width", static_cast<size_t>(mParams.subImageWidth), "pix", false);
      printResult("subimage_height", static_cast<size_t>(mParams.subImageHeight), "pix", false);
      printResult("iterations", static_cast<size_t>(mParams.iterations), "updates", false);
  
      glDeleteProgram(mProgram);
      glDeleteBuffers(1, &mVertexBuffer);
      glDeleteBuffers(1, &mIndexBuffer);
      glDeleteTextures(1, &mTexture);
      delete[] mPixels;
  }
  
  void TexSubImageBenchmark::beginDrawBenchmark()
  {
      // Set the viewport
      glViewport(0, 0, getWindow()->getWidth(), getWindow()->getHeight());
  
      // Clear the color buffer
      glClear(GL_COLOR_BUFFER_BIT);
  
      // Use the program object
      glUseProgram(mProgram);
  
      // Bind the buffers
      glBindBuffer(GL_ARRAY_BUFFER, mVertexBuffer);
      glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, mIndexBuffer);
  
      // Load the vertex position
      glVertexAttribPointer(mPositionLoc, 3, GL_FLOAT, GL_FALSE, 5 * sizeof(GLfloat), 0);
      // Load the texture coordinate
      glVertexAttribPointer(mTexCoordLoc, 2, GL_FLOAT, GL_FALSE, 5 * sizeof(GLfloat), (GLvoid*)(3 * sizeof(GLfloat)));
  
      glEnableVertexAttribArray(mPositionLoc);
      glEnableVertexAttribArray(mTexCoordLoc);
  
      // Bind the texture
      glActiveTexture(GL_TEXTURE0);
      glBindTexture(GL_TEXTURE_2D, mTexture);
  
      // Set the texture sampler to texture unit to 0
      glUniform1i(mSamplerLoc, 0);
  }
  
  void TexSubImageBenchmark::drawBenchmark()
  {
      glTexSubImage2D(GL_TEXTURE_2D, 0,
                      rand() % (mParams.imageWidth - mParams.subImageWidth),
                      rand() % (mParams.imageHeight - mParams.subImageHeight),
                      mParams.subImageWidth, mParams.subImageHeight,
                      GL_RGBA, GL_UNSIGNED_BYTE, mPixels);
  
      glDrawElements(GL_TRIANGLES, 6, GL_UNSIGNED_SHORT, 0);
  }
  

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