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

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• Author : Olli Etuaho
  Date : 2017-09-18 13:32:29
  Hash : a20af6d7
  Message : Use C++11 raw string literals instead of SHADER_SOURCE macro This is better in many ways: 1. It doesn't confuse clang format 2. \n doesn't need to be included after preprocessor directives like the version directive. 3. It's using built-in functionality instead of something custom. Raw string literals should be the preferred way to include shader source in C++ files going forward. BUG=angleproject:2157 TEST=angle_end2end_tests Change-Id: I8b236a6e2d5c25d920297e5bc5b5b143eddeba1f Reviewed-on: https://chromium-review.googlesource.com/671046 Reviewed-by: Corentin Wallez <cwallez@chromium.org> Reviewed-by: Jamie Madill <jmadill@chromium.org> Commit-Queue: Olli Etuaho <oetuaho@nvidia.com>

• 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 "system_utils.h"
  #include "test_utils/ANGLETest.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();
  
          const std::string vertexShaderSource =
              R"(precision highp float;
              attribute vec2 position;
  
              void main()
              {
                  gl_Position = vec4(position, 0.0, 1.0);
              })";
  
          const std::string fragmentShaderSource =
              R"(precision highp float;
              uniform vec4 color;
  
              void main()
              {
                  gl_FragColor = color;
              })";
  
          mProgram = CompileProgram(vertexShaderSource, fragmentShaderSource);
          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)
  {
      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)
  {
      if (getClientMajorVersion() < 3 && !extensionEnabled("GL_OES_element_index_uint"))
      {
          std::cout << "Test skipped because ES3 or GL_OES_element_index_uint is not available."
                    << std::endl;
          return;
      }
  
      GLuint indexData[] = {0, 1, 2, 1, 2, 3};
      runTest(GL_UNSIGNED_INT, 4, indexData);
  }
  
  ANGLE_INSTANTIATE_TEST(IndexBufferOffsetTest,
                         ES2_D3D9(),
                         ES2_D3D11(),
                         ES3_D3D11(),
                         ES2_OPENGL(),
                         ES3_OPENGL(),
                         ES2_OPENGLES(),
                         ES3_OPENGLES());