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

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• Hash : a56a86e6
  Author :
  Date : 2014-04-22T13:14:06
  

  Update the VertexAttribute test expectations.
  
  When we switched from converting 8-bit normalized signed int from a
  full 32-bit float expansion to a 4-channel 8-bit format, we broke an
  ANGLE test. Giving the test a slightly looser bound produces the correct
  output, due to floating point rounding.
  
  BUG=angle:612
  
  Change-Id: I8781e6efe83341e22d31d35b35e0048889bcd540
  Reviewed-on: https://chromium-review.googlesource.com/196532
  Reviewed-by: Geoff Lang <geofflang@chromium.org>
  Reviewed-by: Shannon Woods <shannonwoods@chromium.org>
  Tested-by: Jamie Madill <jmadill@chromium.org>
  

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• tests/angle_tests/VertexAttributeTest.cpp

• #include "ANGLETest.h"
  
  class VertexAttributeTest : public ANGLETest
  {
  protected:
      VertexAttributeTest()
      {
          setWindowWidth(128);
          setWindowHeight(128);
          setConfigRedBits(8);
          setConfigGreenBits(8);
          setConfigBlueBits(8);
          setConfigAlphaBits(8);
          setConfigDepthBits(24);
  
          mProgram = 0;
          mTestAttrib = -1;
          mExpectedAttrib = -1;
      }
  
      struct TestData
      {
          GLenum type;
          GLboolean normalized;
  
          const void *inputData;
          const GLfloat *expectedData;
      };
  
      void runTest(const TestData& test)
      {
          GLint viewportSize[4];
          glGetIntegerv(GL_VIEWPORT, viewportSize);
  
          GLint midPixelX = (viewportSize[0] + viewportSize[2]) / 2;
          GLint midPixelY = (viewportSize[1] + viewportSize[3]) / 2;
  
          for (size_t i = 0; i < 4; i++)
          {
              glBindBuffer(GL_ARRAY_BUFFER, 0);
              glVertexAttribPointer(mTestAttrib, i + 1, test.type, test.normalized, 0, test.inputData);
              glVertexAttribPointer(mExpectedAttrib, i + 1, GL_FLOAT, GL_FALSE, 0, test.expectedData);
  
              glEnableVertexAttribArray(mTestAttrib);
              glEnableVertexAttribArray(mExpectedAttrib);
  
              drawQuad(mProgram, "position", 0.5f);
  
              glDisableVertexAttribArray(mTestAttrib);
              glDisableVertexAttribArray(mExpectedAttrib);
  
              // We need to offset our checks from triangle edges to ensure we don't fall on a single tri
              // Avoid making assumptions of drawQuad with four checks to check the four possible tri regions
              EXPECT_PIXEL_EQ((midPixelX + viewportSize[0]) / 2, midPixelY, 255, 255, 255, 255);
              EXPECT_PIXEL_EQ((midPixelX + viewportSize[2]) / 2, midPixelY, 255, 255, 255, 255);
              EXPECT_PIXEL_EQ(midPixelX, (midPixelY + viewportSize[1]) / 2, 255, 255, 255, 255);
              EXPECT_PIXEL_EQ(midPixelX, (midPixelY + viewportSize[3]) / 2, 255, 255, 255, 255);
          }
      }
  
      virtual void SetUp()
      {
          ANGLETest::SetUp();
  
          const std::string testVertexShaderSource = SHADER_SOURCE
          (
              attribute highp vec4 position;
              attribute highp vec4 test;
              attribute highp vec4 expected;
  
              varying highp vec4 color;
  
              void main(void)
              {
                  gl_Position = position;
                  color = vec4(lessThan(abs(test - expected), vec4(1.0 / 64.0)));
              }
          );
  
          const std::string testFragmentShaderSource = SHADER_SOURCE
          (
              varying highp vec4 color;
              void main(void)
              {
                  gl_FragColor = color;
              }
          );
  
          mProgram = compileProgram(testVertexShaderSource, testFragmentShaderSource);
          if (mProgram == 0)
          {
              FAIL() << "shader compilation failed.";
          }
  
          mTestAttrib = glGetAttribLocation(mProgram, "test");
          mExpectedAttrib = glGetAttribLocation(mProgram, "expected");
  
          glUseProgram(mProgram);
  
          glClearColor(0, 0, 0, 0);
          glClearDepthf(0.0);
          glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
  
          glDisable(GL_DEPTH_TEST);
      }
  
      virtual void TearDown()
      {
          glDeleteProgram(mProgram);
  
          ANGLETest::TearDown();
      }
  
      static const size_t mVertexCount = 24;
  
      GLuint mProgram;
      GLint mTestAttrib;
      GLint mExpectedAttrib;
  };
  
  TEST_F(VertexAttributeTest, unsigned_byte_unormalized)
  {
      GLubyte inputData[mVertexCount] = { 0, 1, 2, 3, 4, 5, 6, 7, 125, 126, 127, 128, 129, 250, 251, 252, 253, 254, 255 };
      GLfloat expectedData[mVertexCount];
      for (size_t i = 0; i < mVertexCount; i++)
      {
          expectedData[i] = inputData[i];
      }
  
      TestData data = { GL_UNSIGNED_BYTE, GL_FALSE, inputData, expectedData };
      runTest(data);
  }
  
  TEST_F(VertexAttributeTest, unsigned_byte_normalized)
  {
      GLubyte inputData[mVertexCount] = { 0, 1, 2, 3, 4, 5, 6, 7, 125, 126, 127, 128, 129, 250, 251, 252, 253, 254, 255 };
      GLfloat expectedData[mVertexCount];
      for (size_t i = 0; i < mVertexCount; i++)
      {
          expectedData[i] = inputData[i] / 255.0f;
      }
  
      TestData data = { GL_UNSIGNED_BYTE, GL_TRUE, inputData, expectedData };
      runTest(data);
  }
  
  TEST_F(VertexAttributeTest, byte_unnormalized)
  {
      GLbyte inputData[mVertexCount] = { 0, 1, 2, 3, 4, -1, -2, -3, -4, 125, 126, 127, -128, -127, -126 };
      GLfloat expectedData[mVertexCount];
      for (size_t i = 0; i < mVertexCount; i++)
      {
          expectedData[i] = inputData[i];
      }
  
      TestData data = { GL_BYTE, GL_FALSE, inputData, expectedData };
      runTest(data);
  }
  
  TEST_F(VertexAttributeTest, byte_normalized)
  {
      GLbyte inputData[mVertexCount] = { 0, 1, 2, 3, 4, -1, -2, -3, -4, 125, 126, 127, -128, -127, -126 };
      GLfloat expectedData[mVertexCount];
      for (size_t i = 0; i < mVertexCount; i++)
      {
          expectedData[i] = ((2.0f * inputData[i]) + 1.0f) / 255.0f;
      }
  
      TestData data = { GL_BYTE, GL_TRUE, inputData, expectedData };
      runTest(data);
  }
  
  TEST_F(VertexAttributeTest, unsigned_short_unormalized)
  {
      GLushort inputData[mVertexCount] = { 0, 1, 2, 3, 254, 255, 256, 32766, 32767, 32768, 65533, 65534, 65535 };
      GLfloat expectedData[mVertexCount];
      for (size_t i = 0; i < mVertexCount; i++)
      {
          expectedData[i] = inputData[i];
      }
  
      TestData data = { GL_UNSIGNED_SHORT, GL_FALSE, inputData, expectedData };
      runTest(data);
  }
  
  TEST_F(VertexAttributeTest, unsigned_short_normalized)
  {
      GLushort inputData[mVertexCount] = { 0, 1, 2, 3, 254, 255, 256, 32766, 32767, 32768, 65533, 65534, 65535 };
      GLfloat expectedData[mVertexCount];
      for (size_t i = 0; i < mVertexCount; i++)
      {
          expectedData[i] = inputData[i] / 65535.0f;
      }
  
      TestData data = { GL_UNSIGNED_SHORT, GL_TRUE, inputData, expectedData };
      runTest(data);
  }
  
  TEST_F(VertexAttributeTest, short_unnormalized)
  {
      GLshort inputData[mVertexCount] = {  0, 1, 2, 3, -1, -2, -3, -4, 32766, 32767, -32768, -32767, -32766 };
      GLfloat expectedData[mVertexCount];
      for (size_t i = 0; i < mVertexCount; i++)
      {
          expectedData[i] = inputData[i];
      }
  
      TestData data = { GL_SHORT, GL_FALSE, inputData, expectedData };
      runTest(data);
  }
  
  TEST_F(VertexAttributeTest, short_normalized)
  {
      GLshort inputData[mVertexCount] = {  0, 1, 2, 3, -1, -2, -3, -4, 32766, 32767, -32768, -32767, -32766 };
      GLfloat expectedData[mVertexCount];
      for (size_t i = 0; i < mVertexCount; i++)
      {
          expectedData[i] = ((2.0f * inputData[i]) + 1.0f) / 65535.0f;
      }
  
      TestData data = { GL_SHORT, GL_TRUE, inputData, expectedData };
      runTest(data);
  }
  

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