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

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• Hash : 6b6fd54a
  Author :
  Date : 2014-05-06T17:09:19
  

  Adds the PBO extension test
  
  BUG=angle:581
  
  Change-Id: I50a1181d0547c5629c9037f6d8e989c505c7e5ed
  Reviewed-on: https://chromium-review.googlesource.com/198239
  Reviewed-by: Jamie Madill <jmadill@chromium.org>
  Tested-by: Shannon Woods <shannonwoods@chromium.org>
  

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• tests/angle_tests/PBOExtensionTest.cpp

• #include "ANGLETest.h"
  
  class PBOExtensionTest : public ANGLETest
  {
  protected:
      PBOExtensionTest()
      {
          setClientVersion(2);
          setWindowWidth(32);
          setWindowHeight(32);
          setConfigRedBits(8);
          setConfigGreenBits(8);
          setConfigBlueBits(8);
          setConfigAlphaBits(8);
      }
  
      virtual void SetUp()
      {
          ANGLETest::SetUp();
  
          if (extensionEnabled("NV_pixel_buffer_object"))
          {
              glGenBuffers(1, &mPBO);
              glBindBuffer(GL_PIXEL_PACK_BUFFER, mPBO);
              glBufferData(GL_PIXEL_PACK_BUFFER, 4 * getWindowWidth() * getWindowHeight(), NULL, GL_STATIC_DRAW);
              glBindBuffer(GL_PIXEL_PACK_BUFFER, 0);
  
              const char *vertexShaderSrc = SHADER_SOURCE
              (
                  attribute vec4 aTest;
                  attribute vec2 aPosition;
                  varying vec4 vTest;
  
                  void main()
                  {
                      vTest = aTest;
                      gl_Position = vec4(aPosition, 0.0, 1.0);
                      gl_PointSize = 1.0;
                  }
              );
  
              const char *fragmentShaderSrc = SHADER_SOURCE
              (
                  precision mediump float;
                  varying vec4 vTest;
  
                  void main()
                  {
                      gl_FragColor = vTest;
                  }
              );
  
              mProgram = compileProgram(vertexShaderSrc, fragmentShaderSrc);
  
              glGenBuffers(1, &mPositionVBO);
              glBindBuffer(GL_ARRAY_BUFFER, mPositionVBO);
              glBufferData(GL_ARRAY_BUFFER, 128, NULL, GL_DYNAMIC_DRAW);
              glBindBuffer(GL_ARRAY_BUFFER, 0);
          }
          ASSERT_GL_NO_ERROR();
      }
  
      virtual void TearDown()
      {
          ANGLETest::TearDown();
  
          glDeleteBuffers(1, &mPBO);
          glDeleteProgram(mProgram);
      }
  
      GLuint mPBO;
      GLuint mProgram;
      GLuint mPositionVBO;
  };
  
  TEST_F(PBOExtensionTest, pbo_with_other_target)
  {
      if (extensionEnabled("NV_pixel_buffer_object"))
      {
          glClearColor(1.0f, 0.0f, 0.0f, 1.0f);
          glClear(GL_COLOR_BUFFER_BIT);
          EXPECT_GL_NO_ERROR();
  
          glBindBuffer(GL_PIXEL_PACK_BUFFER, mPBO);
          glReadPixels(0, 0, 16, 16, GL_RGBA, GL_UNSIGNED_BYTE, 0);
  
          glBindBuffer(GL_PIXEL_PACK_BUFFER, 0);
          glBindBuffer(GL_ARRAY_BUFFER, mPBO);
  
          GLvoid *mappedPtr = glMapBufferRangeEXT(GL_ARRAY_BUFFER, 0, 32, GL_MAP_READ_BIT);
          unsigned char *dataPtr = static_cast<unsigned char *>(mappedPtr);
          EXPECT_GL_NO_ERROR();
  
          EXPECT_EQ(255, dataPtr[0]);
          EXPECT_EQ(0,   dataPtr[1]);
          EXPECT_EQ(0,   dataPtr[2]);
          EXPECT_EQ(255, dataPtr[3]);
  
          glUnmapBufferOES(GL_ARRAY_BUFFER);
      }
      EXPECT_GL_NO_ERROR();
  }
  
  TEST_F(PBOExtensionTest, pbo_with_existing_data)
  {
      if (extensionEnabled("NV_pixel_buffer_object"))
      {
          // Clear backbuffer to red
          glClearColor(1.0f, 0.0f, 0.0f, 1.0f);
          glClear(GL_COLOR_BUFFER_BIT);
          EXPECT_GL_NO_ERROR();
  
          // Read 16x16 region from red backbuffer to PBO
          glBindBuffer(GL_PIXEL_PACK_BUFFER, mPBO);
          glReadPixels(0, 0, 16, 16, GL_RGBA, GL_UNSIGNED_BYTE, 0);
  
          // Clear backbuffer to green
          glClearColor(0.0f, 1.0f, 0.0f, 1.0f);
          glClear(GL_COLOR_BUFFER_BIT);
          EXPECT_GL_NO_ERROR();
  
          // Read 16x16 region from green backbuffer to PBO at offset 16
          glReadPixels(0, 0, 16, 16, GL_RGBA, GL_UNSIGNED_BYTE, reinterpret_cast<GLvoid*>(16));
          GLvoid * mappedPtr = glMapBufferRangeEXT(GL_PIXEL_PACK_BUFFER, 0, 32, GL_MAP_READ_BIT);
          unsigned char *dataPtr = static_cast<unsigned char *>(mappedPtr);
          EXPECT_GL_NO_ERROR();
  
          // Test pixel 0 is red (existing data)
          EXPECT_EQ(255, dataPtr[0]);
          EXPECT_EQ(0, dataPtr[1]);
          EXPECT_EQ(0, dataPtr[2]);
          EXPECT_EQ(255, dataPtr[3]);
  
          // Test pixel 16 is green (new data)
          EXPECT_EQ(0, dataPtr[16 * 4 + 0]);
          EXPECT_EQ(255, dataPtr[16 * 4 + 1]);
          EXPECT_EQ(0, dataPtr[16 * 4 + 2]);
          EXPECT_EQ(255, dataPtr[16 * 4 + 3]);
  
          glUnmapBufferOES(GL_PIXEL_PACK_BUFFER);
      }
      EXPECT_GL_NO_ERROR();
  }
  

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