kc3-lang/angle/tests/angle_tests/IndexedPointsTest.cpp

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• Hash : f8c2f5cb
  Author :
  Date : 2013-12-05T13:52:33
  

  Fix indices not being offset to the bound vertex buffer when drawing indexed points in D3D9.
  
  bug=angle:535
  
  Change-Id: I5b86874cddbd3b90fe141e94085f5a4afb9f3db3
  Reviewed-on: https://chromium-review.googlesource.com/179101
  Reviewed-by: Shannon Woods <shannonwoods@chromium.org>
  Tested-by: Shannon Woods <shannonwoods@chromium.org>
  

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• tests/angle_tests/IndexedPointsTest.cpp

• #include "ANGLETest.h"
  #include <array>
  
  template <typename IndexType, GLenum IndexTypeName>
  class IndexedPointsTest : public ANGLETest
  {
  protected:
      IndexedPointsTest()
      {
          setWindowWidth(128);
          setWindowHeight(128);
          setConfigRedBits(8);
          setConfigGreenBits(8);
          setConfigBlueBits(8);
          setConfigAlphaBits(8);
          setConfigDepthBits(24);
      }
  
      float getIndexPositionX(size_t idx)
      {
          return (idx == 0 || idx == 3) ? -0.5f : 0.5f;
      }
  
      float getIndexPositionY(size_t idx)
      {
          return (idx == 2 || idx == 3) ? -0.5f : 0.5f;
      }
  
      virtual void SetUp()
      {
          ANGLETest::SetUp();
  
          const std::string vertexShaderSource = SHADER_SOURCE
          (
              precision highp float;
              attribute vec2 position;
  
              void main()
              {
                  gl_PointSize = 5.0;
                  gl_Position = vec4(position, 0.0, 1.0);
              }
          );
  
          const std::string fragmentShaderSource = SHADER_SOURCE
          (
              precision highp float;
  
              void main()
              {
                  gl_FragColor = vec4(1.0, 0.0, 0.0, 1.0);
              }
          );
  
          mProgram = compileProgram(vertexShaderSource, fragmentShaderSource);
          if (mProgram == 0)
          {
              FAIL() << "shader compilation failed.";
          }
  
          std::array<GLfloat, mPointCount * 2> vertices =
          {
              getIndexPositionX(0), getIndexPositionY(0),
              getIndexPositionX(1), getIndexPositionY(1),
              getIndexPositionX(2), getIndexPositionY(2),
              getIndexPositionX(3), getIndexPositionY(3),
          };
          glGenBuffers(1, &mVertexBuffer);
          glBindBuffer(GL_ARRAY_BUFFER, mVertexBuffer);
          glBufferData(GL_ARRAY_BUFFER, vertices.size() * sizeof(GLfloat), vertices.data(), GL_STATIC_DRAW);
  
          std::array<IndexType, mPointCount> indices = { 0, 1, 2, 3 };
          glGenBuffers(1, &mIndexBuffer);
          glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, mIndexBuffer);
          glBufferData(GL_ELEMENT_ARRAY_BUFFER, indices.size() * sizeof(IndexType), indices.data(), GL_STATIC_DRAW);
      }
  
      virtual void TearDown()
      {
          glDeleteProgram(mProgram);
  
          ANGLETest::TearDown();
      }
  
      void runTest(GLuint firstIndex)
      {
          glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
          glClear(GL_COLOR_BUFFER_BIT);
  
          GLint viewportSize[4];
          glGetIntegerv(GL_VIEWPORT, viewportSize);
  
          glBindBuffer(GL_ARRAY_BUFFER, mVertexBuffer);
          GLint vertexLocation = glGetAttribLocation(mProgram, "position");
          glVertexAttribPointer(vertexLocation, 2, GL_FLOAT, GL_FALSE, 0, 0);
          glEnableVertexAttribArray(vertexLocation);
  
          glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, mIndexBuffer);
  
          glUseProgram(mProgram);
  
          glDrawElements(GL_POINTS, mPointCount - firstIndex, IndexTypeName, reinterpret_cast<void*>(firstIndex * sizeof(IndexType)));
  
          for (size_t i = 0; i < mPointCount; i++)
          {
              GLuint x = viewportSize[0] + (getIndexPositionX(i) * 0.5f + 0.5f) * (viewportSize[2] - viewportSize[0]);
              GLuint y = viewportSize[1] + (getIndexPositionY(i) * 0.5f + 0.5f) * (viewportSize[3] - viewportSize[1]);
  
              if (i < firstIndex)
              {
                  EXPECT_PIXEL_EQ(x, y, 0, 0, 0, 255);
              }
              else
              {
                  EXPECT_PIXEL_EQ(x, y, 255, 0, 0, 255);
              }
          }
      }
  
      GLuint mProgram;
      GLuint mVertexBuffer;
      GLuint mIndexBuffer;
      static const GLuint mPointCount = 4;
  };
  
  typedef IndexedPointsTest<GLubyte, GL_UNSIGNED_BYTE> IndexedPointsTestUByte;
  
  TEST_F(IndexedPointsTestUByte, unsigned_byte_offset_0)
  {
      runTest(0);
  }
  
  TEST_F(IndexedPointsTestUByte, unsigned_byte_offset_1)
  {
      runTest(1);
  }
  
  TEST_F(IndexedPointsTestUByte, unsigned_byte_offset_2)
  {
      runTest(2);
  }
  
  TEST_F(IndexedPointsTestUByte, unsigned_byte_offset_3)
  {
      runTest(3);
  }
  
  typedef IndexedPointsTest<GLushort, GL_UNSIGNED_SHORT> IndexedPointsTestUShort;
  
  TEST_F(IndexedPointsTestUShort, unsigned_short_offset_0)
  {
      runTest(0);
  }
  
  TEST_F(IndexedPointsTestUShort, unsigned_short_offset_1)
  {
      runTest(1);
  }
  
  TEST_F(IndexedPointsTestUShort, unsigned_short_offset_2)
  {
      runTest(2);
  }
  
  TEST_F(IndexedPointsTestUShort, unsigned_short_offset_3)
  {
      runTest(3);
  }
  
  typedef IndexedPointsTest<GLuint, GL_UNSIGNED_INT> IndexedPointsTestUInt;
  
  TEST_F(IndexedPointsTestUInt, unsigned_int_offset_0)
  {
      if (getClientVersion() < 3 && !extensionEnabled("GL_OES_element_index_uint"))
      {
          return;
      }
  
      runTest(0);
  }
  
  TEST_F(IndexedPointsTestUInt, unsigned_int_offset_1)
  {
      if (getClientVersion() < 3 && !extensionEnabled("GL_OES_element_index_uint"))
      {
          return;
      }
  
      runTest(1);
  }
  
  TEST_F(IndexedPointsTestUInt, unsigned_int_offset_2)
  {
      if (getClientVersion() < 3 && !extensionEnabled("GL_OES_element_index_uint"))
      {
          return;
      }
  
      runTest(2);
  }
  
  TEST_F(IndexedPointsTestUInt, unsigned_int_offset_3)
  {
      if (getClientVersion() < 3 && !extensionEnabled("GL_OES_element_index_uint"))
      {
          return;
      }
  
      runTest(3);
  }
  

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