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

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• Hash : 5804dc8e
  Author :
  Date : 2018-04-13T14:11:46
  

  Refactor GL tests to use a shader library
  
  Instead of having the same simple shaders repeated over and over in
  the test code, reuse a single shader library.
  
  BUG=angleproject:2474
  TEST=angle_end2end_tests
  
  Change-Id: I13f8ca8c0125e6d30f1761639bf8c3f69e0e77d2
  Reviewed-on: https://chromium-review.googlesource.com/1012078
  Reviewed-by: Jamie Madill <jmadill@chromium.org>
  Commit-Queue: Olli Etuaho <oetuaho@nvidia.com>
  

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• src/tests/gl_tests/BlendMinMaxTest.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.
  //
  
  #include "test_utils/ANGLETest.h"
  
  using namespace angle;
  
  class BlendMinMaxTest : public ANGLETest
  {
    protected:
      BlendMinMaxTest()
      {
          setWindowWidth(128);
          setWindowHeight(128);
          setConfigRedBits(8);
          setConfigGreenBits(8);
          setConfigBlueBits(8);
          setConfigAlphaBits(8);
          setConfigDepthBits(24);
  
          mProgram = 0;
          mColorLocation = -1;
          mFramebuffer = 0;
          mColorRenderbuffer = 0;
      }
  
      struct Color
      {
          float values[4];
      };
  
      static float getExpected(bool blendMin, float curColor, float prevColor)
      {
          return blendMin ? std::min(curColor, prevColor) : std::max(curColor, prevColor);
      }
  
      void runTest(GLenum colorFormat, GLenum type)
      {
          ANGLE_SKIP_TEST_IF(getClientMajorVersion() < 3 && !extensionEnabled("GL_EXT_blend_minmax"));
  
          SetUpFramebuffer(colorFormat);
  
          int minValue = 0;
          int maxValue = 1;
          if (type == GL_FLOAT)
          {
              minValue = -1024;
              maxValue = 1024;
          }
  
          const size_t colorCount = 128;
          Color colors[colorCount];
          for (size_t i = 0; i < colorCount; i++)
          {
              for (size_t j = 0; j < 4; j++)
              {
                  colors[i].values[j] =
                      static_cast<float>(minValue + (rand() % (maxValue - minValue)));
              }
          }
  
          float prevColor[4];
          for (size_t i = 0; i < colorCount; i++)
          {
              const Color &color = colors[i];
              glUseProgram(mProgram);
              glUniform4f(mColorLocation, color.values[0], color.values[1], color.values[2], color.values[3]);
  
              bool blendMin = (rand() % 2 == 0);
              glBlendEquation(blendMin ? GL_MIN : GL_MAX);
  
              drawQuad(mProgram, essl1_shaders::PositionAttrib(), 0.5f);
  
              float pixel[4];
              if (type == GL_UNSIGNED_BYTE)
              {
                  GLubyte ubytePixel[4];
                  glReadPixels(0, 0, 1, 1, GL_RGBA, GL_UNSIGNED_BYTE, ubytePixel);
                  for (size_t componentIdx = 0; componentIdx < ArraySize(pixel); componentIdx++)
                  {
                      pixel[componentIdx] = ubytePixel[componentIdx] / 255.0f;
                  }
              }
              else if (type == GL_FLOAT)
              {
                  glReadPixels(0, 0, 1, 1, GL_RGBA, GL_FLOAT, pixel);
              }
              else
              {
                  FAIL() << "Unexpected pixel type";
              }
  
              if (i > 0)
              {
                  const float errorRange = 1.0f / 255.0f;
                  for (size_t componentIdx = 0; componentIdx < ArraySize(pixel); componentIdx++)
                  {
                      EXPECT_NEAR(
                          getExpected(blendMin, color.values[componentIdx], prevColor[componentIdx]),
                          pixel[componentIdx], errorRange);
                  }
              }
  
              memcpy(prevColor, pixel, sizeof(pixel));
          }
      }
  
      virtual void SetUp()
      {
          ANGLETest::SetUp();
  
          mProgram = CompileProgram(essl1_shaders::vs::Simple(), essl1_shaders::fs::UniformColor());
          if (mProgram == 0)
          {
              FAIL() << "shader compilation failed.";
          }
  
          mColorLocation = glGetUniformLocation(mProgram, essl1_shaders::ColorUniform());
  
          glUseProgram(mProgram);
  
          glClearColor(0, 0, 0, 0);
          glClearDepthf(0.0);
          glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
  
          glEnable(GL_BLEND);
          glDisable(GL_DEPTH_TEST);
      }
  
      void SetUpFramebuffer(GLenum colorFormat)
      {
          glGenFramebuffers(1, &mFramebuffer);
          glBindFramebuffer(GL_FRAMEBUFFER, mFramebuffer);
  
          glGenRenderbuffers(1, &mColorRenderbuffer);
          glBindRenderbuffer(GL_RENDERBUFFER, mColorRenderbuffer);
          glRenderbufferStorage(GL_RENDERBUFFER, colorFormat, getWindowWidth(), getWindowHeight());
          glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_RENDERBUFFER, mColorRenderbuffer);
  
          glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
          glClear(GL_COLOR_BUFFER_BIT);
  
          ASSERT_GL_NO_ERROR();
      }
  
      virtual void TearDown()
      {
          glDeleteProgram(mProgram);
          glDeleteFramebuffers(1, &mFramebuffer);
          glDeleteRenderbuffers(1, &mColorRenderbuffer);
  
          ANGLETest::TearDown();
      }
  
      GLuint mProgram;
      GLint mColorLocation;
  
      GLuint mFramebuffer;
      GLuint mColorRenderbuffer;
  };
  
  TEST_P(BlendMinMaxTest, RGBA8)
  {
      runTest(GL_RGBA8, GL_UNSIGNED_BYTE);
  }
  
  TEST_P(BlendMinMaxTest, RGBA32F)
  {
      ANGLE_SKIP_TEST_IF(getClientMajorVersion() < 3 ||
                         !extensionEnabled("GL_EXT_color_buffer_float"));
  
      // Ignore SDK layers messages on D3D11 FL 9.3 (http://anglebug.com/1284)
      ANGLE_SKIP_TEST_IF(IsD3D11_FL93());
  
      runTest(GL_RGBA32F, GL_FLOAT);
  }
  
  TEST_P(BlendMinMaxTest, RGBA16F)
  {
      ANGLE_SKIP_TEST_IF(getClientMajorVersion() < 3 &&
                         !extensionEnabled("GL_EXT_color_buffer_half_float"));
  
      runTest(GL_RGBA16F, GL_FLOAT);
  }
  
  // Use this to select which configurations (e.g. which renderer, which GLES major version) these tests should be run against.
  ANGLE_INSTANTIATE_TEST(BlendMinMaxTest,
                         ES2_D3D9(),
                         ES2_D3D11(),
                         ES3_D3D11(),
                         ES2_D3D11_FL9_3(),
                         ES2_OPENGL(),
                         ES3_OPENGL(),
                         ES2_OPENGLES(),
                         ES3_OPENGLES());
  

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