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

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• Hash : 1be913cf
  Author :
  Date : 2016-07-11T17:59:16
  

  Add support for ES31 context creation
  
  The dEQP test for context creation passes.
  
  SH_WEBGL3_SPEC has been added, but it should be considered whether we
  should keep it, remove it or rename it. It was added so that there is
  a webgl mapping to es 310 shaders. Check Compiler.cpp. The bison file
  has been modified so that some tokens from es3 can be also used in
  es31 as well.
  
  A separate macro ES3_1_ONLY is added so that some tokens are limited
  only for es 310 shaders.
  
  BUG=angleproject:1442
  TEST=angle_unittests
  
  Change-Id: I2e5ca227c96046c30dc796ab934f3fda9c533eba
  Reviewed-on: https://chromium-review.googlesource.com/360300
  Reviewed-by: Jamie Madill <jmadill@chromium.org>
  Commit-Queue: Jamie Madill <jmadill@chromium.org>
  

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• src/tests/gl_tests/StateChangeTest.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.
  //
  // StateChangeTest:
  //   Specifically designed for an ANGLE implementation of GL, these tests validate that
  //   ANGLE's dirty bits systems don't get confused by certain sequences of state changes.
  //
  
  #include "test_utils/ANGLETest.h"
  #include "test_utils/gl_raii.h"
  
  using namespace angle;
  
  namespace
  {
  
  class StateChangeTest : public ANGLETest
  {
    protected:
      StateChangeTest()
      {
          setWindowWidth(64);
          setWindowHeight(64);
          setConfigRedBits(8);
          setConfigGreenBits(8);
          setConfigBlueBits(8);
          setConfigAlphaBits(8);
  
          // Enable the no error extension to avoid syncing the FBO state on validation.
          setNoErrorEnabled(true);
      }
  
      void SetUp() override
      {
          ANGLETest::SetUp();
  
          glGenFramebuffers(1, &mFramebuffer);
          glGenTextures(2, mTextures.data());
          glGenRenderbuffers(1, &mRenderbuffer);
  
          ASSERT_GL_NO_ERROR();
      }
  
      void TearDown() override
      {
          if (mFramebuffer != 0)
          {
              glDeleteFramebuffers(1, &mFramebuffer);
              mFramebuffer = 0;
          }
  
          if (!mTextures.empty())
          {
              glDeleteTextures(static_cast<GLsizei>(mTextures.size()), mTextures.data());
              mTextures.clear();
          }
  
          glDeleteRenderbuffers(1, &mRenderbuffer);
  
          ANGLETest::TearDown();
      }
  
      GLuint mFramebuffer           = 0;
      GLuint mRenderbuffer          = 0;
      std::vector<GLuint> mTextures = {0, 0};
  };
  
  class StateChangeTestES3 : public StateChangeTest
  {
    protected:
      StateChangeTestES3() {}
  };
  
  }  // anonymous namespace
  
  // Ensure that CopyTexImage2D syncs framebuffer changes.
  TEST_P(StateChangeTest, CopyTexImage2DSync)
  {
      if (IsAMD() && getPlatformRenderer() == EGL_PLATFORM_ANGLE_TYPE_OPENGL_ANGLE)
      {
          // TODO(geofflang): Fix on Linux AMD drivers (http://anglebug.com/1291)
          std::cout << "Test disabled on AMD OpenGL." << std::endl;
          return;
      }
  
      glBindFramebuffer(GL_FRAMEBUFFER, mFramebuffer);
  
      // Init first texture to red
      glBindTexture(GL_TEXTURE_2D, mTextures[0]);
      glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 16, 16, 0, GL_RGBA, GL_UNSIGNED_BYTE, nullptr);
      glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, mTextures[0], 0);
      glClearColor(1.0f, 0.0f, 0.0f, 1.0f);
      glClear(GL_COLOR_BUFFER_BIT);
      EXPECT_PIXEL_EQ(0, 0, 255, 0, 0, 255);
  
      // Init second texture to green
      glBindTexture(GL_TEXTURE_2D, mTextures[1]);
      glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 16, 16, 0, GL_RGBA, GL_UNSIGNED_BYTE, nullptr);
      glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, mTextures[1], 0);
      glClearColor(0.0f, 1.0f, 0.0f, 1.0f);
      glClear(GL_COLOR_BUFFER_BIT);
      EXPECT_PIXEL_EQ(0, 0, 0, 255, 0, 255);
  
      // Copy in the red texture to the green one.
      // CopyTexImage should sync the framebuffer attachment change.
      glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, mTextures[0], 0);
      glCopyTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 0, 0, 16, 16, 0);
      glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, mTextures[1], 0);
      EXPECT_PIXEL_EQ(0, 0, 255, 0, 0, 255);
  
      ASSERT_GL_NO_ERROR();
  }
  
  // Ensure that CopyTexSubImage2D syncs framebuffer changes.
  TEST_P(StateChangeTest, CopyTexSubImage2DSync)
  {
      glBindFramebuffer(GL_FRAMEBUFFER, mFramebuffer);
  
      // Init first texture to red
      glBindTexture(GL_TEXTURE_2D, mTextures[0]);
      glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 16, 16, 0, GL_RGBA, GL_UNSIGNED_BYTE, nullptr);
      glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, mTextures[0], 0);
      glClearColor(1.0f, 0.0f, 0.0f, 1.0f);
      glClear(GL_COLOR_BUFFER_BIT);
      EXPECT_PIXEL_EQ(0, 0, 255, 0, 0, 255);
  
      // Init second texture to green
      glBindTexture(GL_TEXTURE_2D, mTextures[1]);
      glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 16, 16, 0, GL_RGBA, GL_UNSIGNED_BYTE, nullptr);
      glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, mTextures[1], 0);
      glClearColor(0.0f, 1.0f, 0.0f, 1.0f);
      glClear(GL_COLOR_BUFFER_BIT);
      EXPECT_PIXEL_EQ(0, 0, 0, 255, 0, 255);
  
      // Copy in the red texture to the green one.
      // CopyTexImage should sync the framebuffer attachment change.
      glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, mTextures[0], 0);
      glCopyTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, 0, 0, 16, 16);
      glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, mTextures[1], 0);
      EXPECT_PIXEL_EQ(0, 0, 255, 0, 0, 255);
  
      ASSERT_GL_NO_ERROR();
  }
  
  // Test that Framebuffer completeness caching works when color attachments change.
  TEST_P(StateChangeTest, FramebufferIncompleteColorAttachment)
  {
      glBindFramebuffer(GL_FRAMEBUFFER, mFramebuffer);
      glBindTexture(GL_TEXTURE_2D, mTextures[0]);
      glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 16, 16, 0, GL_RGBA, GL_UNSIGNED_BYTE, nullptr);
      glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, mTextures[0], 0);
      EXPECT_GLENUM_EQ(GL_FRAMEBUFFER_COMPLETE, glCheckFramebufferStatus(GL_FRAMEBUFFER));
  
      // Change the texture at color attachment 0 to be non-color-renderable.
      glTexImage2D(GL_TEXTURE_2D, 0, GL_ALPHA, 16, 16, 0, GL_ALPHA, GL_UNSIGNED_BYTE, nullptr);
      EXPECT_GLENUM_EQ(GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT,
                       glCheckFramebufferStatus(GL_FRAMEBUFFER));
  
      ASSERT_GL_NO_ERROR();
  }
  
  // Test that caching works when color attachments change with TexStorage.
  TEST_P(StateChangeTest, FramebufferIncompleteWithTexStorage)
  {
      if (!extensionEnabled("GL_EXT_texture_storage"))
      {
          std::cout << "Test skipped because TexStorage2DEXT not available." << std::endl;
      }
  
      glBindFramebuffer(GL_FRAMEBUFFER, mFramebuffer);
      glBindTexture(GL_TEXTURE_2D, mTextures[0]);
      glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 16, 16, 0, GL_RGBA, GL_UNSIGNED_BYTE, nullptr);
      glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, mTextures[0], 0);
      EXPECT_GLENUM_EQ(GL_FRAMEBUFFER_COMPLETE, glCheckFramebufferStatus(GL_FRAMEBUFFER));
  
      // Change the texture at color attachment 0 to be non-color-renderable.
      glTexStorage2DEXT(GL_TEXTURE_2D, 1, GL_ALPHA8_EXT, 16, 16);
      EXPECT_GLENUM_EQ(GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT,
                       glCheckFramebufferStatus(GL_FRAMEBUFFER));
  
      ASSERT_GL_NO_ERROR();
  }
  
  // Test that caching works when color attachments change with CompressedTexImage2D.
  TEST_P(StateChangeTestES3, FramebufferIncompleteWithCompressedTex)
  {
      glBindFramebuffer(GL_FRAMEBUFFER, mFramebuffer);
      glBindTexture(GL_TEXTURE_2D, mTextures[0]);
      glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 16, 16, 0, GL_RGBA, GL_UNSIGNED_BYTE, nullptr);
      glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, mTextures[0], 0);
      EXPECT_GLENUM_EQ(GL_FRAMEBUFFER_COMPLETE, glCheckFramebufferStatus(GL_FRAMEBUFFER));
  
      // Change the texture at color attachment 0 to be non-color-renderable.
      glCompressedTexImage2D(GL_TEXTURE_2D, 0, GL_COMPRESSED_RGB8_ETC2, 16, 16, 0, 64, nullptr);
      EXPECT_GLENUM_EQ(GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT,
                       glCheckFramebufferStatus(GL_FRAMEBUFFER));
  
      ASSERT_GL_NO_ERROR();
  }
  
  // Test that caching works when color attachments are deleted.
  TEST_P(StateChangeTestES3, FramebufferIncompleteWhenAttachmentDeleted)
  {
      glBindFramebuffer(GL_FRAMEBUFFER, mFramebuffer);
      glBindTexture(GL_TEXTURE_2D, mTextures[0]);
      glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 16, 16, 0, GL_RGBA, GL_UNSIGNED_BYTE, nullptr);
      glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, mTextures[0], 0);
      EXPECT_GLENUM_EQ(GL_FRAMEBUFFER_COMPLETE, glCheckFramebufferStatus(GL_FRAMEBUFFER));
  
      // Delete the texture at color attachment 0.
      glDeleteTextures(1, &mTextures[0]);
      mTextures[0] = 0;
      EXPECT_GLENUM_EQ(GL_FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT,
                       glCheckFramebufferStatus(GL_FRAMEBUFFER));
  
      ASSERT_GL_NO_ERROR();
  }
  
  // Test that Framebuffer completeness caching works when depth attachments change.
  TEST_P(StateChangeTest, FramebufferIncompleteDepthAttachment)
  {
      glBindFramebuffer(GL_FRAMEBUFFER, mFramebuffer);
      glBindTexture(GL_TEXTURE_2D, mTextures[0]);
      glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 16, 16, 0, GL_RGBA, GL_UNSIGNED_BYTE, nullptr);
      glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, mTextures[0], 0);
      glBindRenderbuffer(GL_RENDERBUFFER, mRenderbuffer);
      glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH_COMPONENT16, 16, 16);
      glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_RENDERBUFFER, mRenderbuffer);
      EXPECT_GLENUM_EQ(GL_FRAMEBUFFER_COMPLETE, glCheckFramebufferStatus(GL_FRAMEBUFFER));
  
      // Change the texture at color attachment 0 to be non-depth-renderable.
      glRenderbufferStorage(GL_RENDERBUFFER, GL_RGBA8, 16, 16);
      EXPECT_GLENUM_EQ(GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT,
                       glCheckFramebufferStatus(GL_FRAMEBUFFER));
  
      ASSERT_GL_NO_ERROR();
  }
  
  // Test that Framebuffer completeness caching works when stencil attachments change.
  TEST_P(StateChangeTest, FramebufferIncompleteStencilAttachment)
  {
      glBindFramebuffer(GL_FRAMEBUFFER, mFramebuffer);
      glBindTexture(GL_TEXTURE_2D, mTextures[0]);
      glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 16, 16, 0, GL_RGBA, GL_UNSIGNED_BYTE, nullptr);
      glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, mTextures[0], 0);
      glBindRenderbuffer(GL_RENDERBUFFER, mRenderbuffer);
      glRenderbufferStorage(GL_RENDERBUFFER, GL_STENCIL_INDEX8, 16, 16);
      glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_STENCIL_ATTACHMENT, GL_RENDERBUFFER,
                                mRenderbuffer);
      EXPECT_GLENUM_EQ(GL_FRAMEBUFFER_COMPLETE, glCheckFramebufferStatus(GL_FRAMEBUFFER));
  
      // Change the texture at the stencil attachment to be non-stencil-renderable.
      glRenderbufferStorage(GL_RENDERBUFFER, GL_RGBA8, 16, 16);
      EXPECT_GLENUM_EQ(GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT,
                       glCheckFramebufferStatus(GL_FRAMEBUFFER));
  
      ASSERT_GL_NO_ERROR();
  }
  
  // Test that Framebuffer completeness caching works when depth-stencil attachments change.
  TEST_P(StateChangeTest, FramebufferIncompleteDepthStencilAttachment)
  {
      if (getClientMajorVersion() < 3 && !extensionEnabled("GL_OES_packed_depth_stencil"))
      {
          std::cout << "Test skipped because packed depth+stencil not availble." << std::endl;
          return;
      }
  
      if (IsWindows() && IsIntel() && IsOpenGL())
      {
          // TODO(jmadill): Investigate the failure (https://anglebug.com/1388)
          std::cout << "Test disabled on Windows Intel OpenGL." << std::endl;
          return;
      }
  
      glBindFramebuffer(GL_FRAMEBUFFER, mFramebuffer);
      glBindTexture(GL_TEXTURE_2D, mTextures[0]);
      glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 16, 16, 0, GL_RGBA, GL_UNSIGNED_BYTE, nullptr);
      glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, mTextures[0], 0);
      glBindRenderbuffer(GL_RENDERBUFFER, mRenderbuffer);
      glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH24_STENCIL8, 16, 16);
      glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_STENCIL_ATTACHMENT, GL_RENDERBUFFER,
                                mRenderbuffer);
      EXPECT_GLENUM_EQ(GL_FRAMEBUFFER_COMPLETE, glCheckFramebufferStatus(GL_FRAMEBUFFER));
  
      // Change the texture the depth-stencil attachment to be non-depth-stencil-renderable.
      glRenderbufferStorage(GL_RENDERBUFFER, GL_RGBA8, 16, 16);
      EXPECT_GLENUM_EQ(GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT,
                       glCheckFramebufferStatus(GL_FRAMEBUFFER));
  
      ASSERT_GL_NO_ERROR();
  }
  
  // Ensure that CopyTexSubImage3D syncs framebuffer changes.
  TEST_P(StateChangeTestES3, CopyTexSubImage3DSync)
  {
      glBindFramebuffer(GL_FRAMEBUFFER, mFramebuffer);
  
      // Init first texture to red
      glBindTexture(GL_TEXTURE_3D, mTextures[0]);
      glTexImage3D(GL_TEXTURE_3D, 0, GL_RGBA, 16, 16, 16, 0, GL_RGBA, GL_UNSIGNED_BYTE, nullptr);
      glFramebufferTextureLayer(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, mTextures[0], 0, 0);
      glClearColor(1.0f, 0.0f, 0.0f, 1.0f);
      glClear(GL_COLOR_BUFFER_BIT);
      EXPECT_PIXEL_EQ(0, 0, 255, 0, 0, 255);
  
      // Init second texture to green
      glBindTexture(GL_TEXTURE_3D, mTextures[1]);
      glTexImage3D(GL_TEXTURE_3D, 0, GL_RGBA, 16, 16, 16, 0, GL_RGBA, GL_UNSIGNED_BYTE, nullptr);
      glFramebufferTextureLayer(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, mTextures[1], 0, 0);
      glClearColor(0.0f, 1.0f, 0.0f, 1.0f);
      glClear(GL_COLOR_BUFFER_BIT);
      EXPECT_PIXEL_EQ(0, 0, 0, 255, 0, 255);
  
      // Copy in the red texture to the green one.
      // CopyTexImage should sync the framebuffer attachment change.
      glFramebufferTextureLayer(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, mTextures[0], 0, 0);
      glCopyTexSubImage3D(GL_TEXTURE_3D, 0, 0, 0, 0, 0, 0, 16, 16);
      glFramebufferTextureLayer(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, mTextures[1], 0, 0);
      EXPECT_PIXEL_EQ(0, 0, 255, 0, 0, 255);
  
      ASSERT_GL_NO_ERROR();
  }
  
  // Ensure that BlitFramebuffer syncs framebuffer changes.
  TEST_P(StateChangeTestES3, BlitFramebufferSync)
  {
      glBindFramebuffer(GL_FRAMEBUFFER, mFramebuffer);
  
      // Init first texture to red
      glBindTexture(GL_TEXTURE_2D, mTextures[0]);
      glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 16, 16, 0, GL_RGBA, GL_UNSIGNED_BYTE, nullptr);
      glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, mTextures[0], 0);
      glClearColor(1.0f, 0.0f, 0.0f, 1.0f);
      glClear(GL_COLOR_BUFFER_BIT);
      EXPECT_PIXEL_EQ(0, 0, 255, 0, 0, 255);
  
      // Init second texture to green
      glBindTexture(GL_TEXTURE_2D, mTextures[1]);
      glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 16, 16, 0, GL_RGBA, GL_UNSIGNED_BYTE, nullptr);
      glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, mTextures[1], 0);
      glClearColor(0.0f, 1.0f, 0.0f, 1.0f);
      glClear(GL_COLOR_BUFFER_BIT);
      EXPECT_PIXEL_EQ(0, 0, 0, 255, 0, 255);
  
      // Change to the red textures and blit.
      // BlitFramebuffer should sync the framebuffer attachment change.
      glBindFramebuffer(GL_DRAW_FRAMEBUFFER, 0);
      glFramebufferTexture2D(GL_READ_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, mTextures[0],
                             0);
      glBlitFramebuffer(0, 0, 16, 16, 0, 0, 16, 16, GL_COLOR_BUFFER_BIT, GL_NEAREST);
      glBindFramebuffer(GL_READ_FRAMEBUFFER, 0);
      EXPECT_PIXEL_EQ(0, 0, 255, 0, 0, 255);
  
      ASSERT_GL_NO_ERROR();
  }
  
  // Ensure that ReadBuffer and DrawBuffers sync framebuffer changes.
  TEST_P(StateChangeTestES3, ReadBufferAndDrawBuffersSync)
  {
      glBindFramebuffer(GL_FRAMEBUFFER, mFramebuffer);
  
      // Initialize two FBO attachments
      glBindTexture(GL_TEXTURE_2D, mTextures[0]);
      glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 16, 16, 0, GL_RGBA, GL_UNSIGNED_BYTE, nullptr);
      glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, mTextures[0], 0);
      glBindTexture(GL_TEXTURE_2D, mTextures[1]);
      glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 16, 16, 0, GL_RGBA, GL_UNSIGNED_BYTE, nullptr);
      glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT1, GL_TEXTURE_2D, mTextures[1], 0);
  
      // Clear first attachment to red
      GLenum bufs1[] = {GL_COLOR_ATTACHMENT0, GL_NONE};
      glDrawBuffers(2, bufs1);
      glClearColor(1.0f, 0.0f, 0.0f, 1.0f);
      glClear(GL_COLOR_BUFFER_BIT);
  
      // Clear second texture to green
      GLenum bufs2[] = {GL_NONE, GL_COLOR_ATTACHMENT1};
      glDrawBuffers(2, bufs2);
      glClearColor(0.0f, 1.0f, 0.0f, 1.0f);
      glClear(GL_COLOR_BUFFER_BIT);
  
      // Verify first attachment is red and second is green
      glReadBuffer(GL_COLOR_ATTACHMENT1);
      EXPECT_PIXEL_EQ(0, 0, 0, 255, 0, 255);
  
      glReadBuffer(GL_COLOR_ATTACHMENT0);
      EXPECT_PIXEL_EQ(0, 0, 255, 0, 0, 255);
  
      ASSERT_GL_NO_ERROR();
  }
  
  // Tests calling invalidate on incomplete framebuffers after switching attachments.
  // Adapted partially from WebGL 2 test "renderbuffers/invalidate-framebuffer"
  TEST_P(StateChangeTestES3, IncompleteRenderbufferAttachmentInvalidateSync)
  {
      glBindFramebuffer(GL_FRAMEBUFFER, mFramebuffer);
      glBindRenderbuffer(GL_RENDERBUFFER, mRenderbuffer);
      GLint samples = 0;
      glGetInternalformativ(GL_RENDERBUFFER, GL_RGBA8, GL_SAMPLES, 1, &samples);
      glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_RENDERBUFFER, mRenderbuffer);
      ASSERT_GL_NO_ERROR();
  
      // invalidate the framebuffer when the attachment is incomplete: no storage allocated to the
      // attached renderbuffer
      EXPECT_GLENUM_EQ(GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT,
                       glCheckFramebufferStatus(GL_FRAMEBUFFER));
      GLenum attachments1[] = {GL_COLOR_ATTACHMENT0};
      glInvalidateFramebuffer(GL_FRAMEBUFFER, 1, attachments1);
      ASSERT_GL_NO_ERROR();
  
      glRenderbufferStorageMultisample(GL_RENDERBUFFER, static_cast<GLsizei>(samples), GL_RGBA8,
                                       getWindowWidth(), getWindowHeight());
      EXPECT_GLENUM_EQ(GL_FRAMEBUFFER_COMPLETE, glCheckFramebufferStatus(GL_FRAMEBUFFER));
      glClear(GL_COLOR_BUFFER_BIT);
      ASSERT_GL_NO_ERROR();
  
      GLRenderbuffer renderbuf;
  
      glBindRenderbuffer(GL_RENDERBUFFER, renderbuf.get());
      glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_RENDERBUFFER,
                                renderbuf.get());
      ASSERT_GL_NO_ERROR();
  
      // invalidate the framebuffer when the attachment is incomplete: no storage allocated to the
      // attached renderbuffer
      // Note: the bug will only repro *without* a call to checkStatus before the invalidate.
      GLenum attachments2[] = {GL_DEPTH_ATTACHMENT};
      glInvalidateFramebuffer(GL_FRAMEBUFFER, 1, attachments2);
  
      glRenderbufferStorageMultisample(GL_RENDERBUFFER, static_cast<GLsizei>(samples),
                                       GL_DEPTH_COMPONENT16, getWindowWidth(), getWindowHeight());
      EXPECT_GLENUM_EQ(GL_FRAMEBUFFER_COMPLETE, glCheckFramebufferStatus(GL_FRAMEBUFFER));
      glClear(GL_DEPTH_BUFFER_BIT);
      ASSERT_GL_NO_ERROR();
  }
  
  class StateChangeRenderTest : public StateChangeTest
  {
    protected:
      StateChangeRenderTest() : mProgram(0), mRenderbuffer(0) {}
  
      void SetUp() override
      {
          StateChangeTest::SetUp();
  
          const std::string vertexShaderSource =
              "attribute vec2 position;\n"
              "void main() {\n"
              "    gl_Position = vec4(position, 0, 1);\n"
              "}";
          const std::string fragmentShaderSource =
              "uniform highp vec4 uniformColor;\n"
              "void main() {\n"
              "    gl_FragColor = uniformColor;\n"
              "}";
  
          mProgram = CompileProgram(vertexShaderSource, fragmentShaderSource);
          ASSERT_NE(0u, mProgram);
  
          glGenRenderbuffers(1, &mRenderbuffer);
      }
  
      void TearDown() override
      {
          glDeleteProgram(mProgram);
          glDeleteRenderbuffers(1, &mRenderbuffer);
  
          StateChangeTest::TearDown();
      }
  
      void setUniformColor(const GLColor &color)
      {
          glUseProgram(mProgram);
          const Vector4 &normalizedColor = color.toNormalizedVector();
          GLint uniformLocation = glGetUniformLocation(mProgram, "uniformColor");
          ASSERT_NE(-1, uniformLocation);
          glUniform4fv(uniformLocation, 1, normalizedColor.data());
      }
  
      GLuint mProgram;
      GLuint mRenderbuffer;
  };
  
  // Test that re-creating a currently attached texture works as expected.
  TEST_P(StateChangeRenderTest, RecreateTexture)
  {
      if (IsIntel() && IsLinux())
      {
          // TODO(cwallez): Fix on Linux Intel drivers (http://anglebug.com/1346)
          std::cout << "Test disabled on Linux Intel OpenGL." << std::endl;
          return;
      }
  
      glBindFramebuffer(GL_FRAMEBUFFER, mFramebuffer);
  
      glBindTexture(GL_TEXTURE_2D, mTextures[0]);
      glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 16, 16, 0, GL_RGBA, GL_UNSIGNED_BYTE, nullptr);
      glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, mTextures[0], 0);
  
      // Draw with red to the FBO.
      GLColor red(255, 0, 0, 255);
      setUniformColor(red);
      drawQuad(mProgram, "position", 0.5f);
      EXPECT_PIXEL_COLOR_EQ(0, 0, red);
  
      // Recreate the texture with green.
      GLColor green(0, 255, 0, 255);
      std::vector<GLColor> greenPixels(32 * 32, green);
      glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 32, 32, 0, GL_RGBA, GL_UNSIGNED_BYTE,
                   greenPixels.data());
      EXPECT_PIXEL_COLOR_EQ(0, 0, green);
  
      // Verify drawing blue gives blue. This covers the FBO sync with D3D dirty bits.
      GLColor blue(0, 0, 255, 255);
      setUniformColor(blue);
      drawQuad(mProgram, "position", 0.5f);
      EXPECT_PIXEL_COLOR_EQ(0, 0, blue);
  
      EXPECT_GL_NO_ERROR();
  }
  
  // Test that re-creating a currently attached renderbuffer works as expected.
  TEST_P(StateChangeRenderTest, RecreateRenderbuffer)
  {
      glBindFramebuffer(GL_FRAMEBUFFER, mFramebuffer);
  
      glBindRenderbuffer(GL_RENDERBUFFER, mRenderbuffer);
      glRenderbufferStorage(GL_RENDERBUFFER, GL_RGBA8, 16, 16);
      glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_RENDERBUFFER, mRenderbuffer);
  
      // Draw with red to the FBO.
      GLColor red(255, 0, 0, 255);
      setUniformColor(red);
      drawQuad(mProgram, "position", 0.5f);
      EXPECT_PIXEL_COLOR_EQ(0, 0, red);
  
      // Recreate the renderbuffer and clear to green.
      glRenderbufferStorage(GL_RENDERBUFFER, GL_RGBA8, 32, 32);
      glClearColor(0.0f, 1.0f, 0.0f, 1.0f);
      glClear(GL_COLOR_BUFFER_BIT);
      GLColor green(0, 255, 0, 255);
      EXPECT_PIXEL_COLOR_EQ(0, 0, green);
  
      // Verify drawing blue gives blue. This covers the FBO sync with D3D dirty bits.
      GLColor blue(0, 0, 255, 255);
      setUniformColor(blue);
      drawQuad(mProgram, "position", 0.5f);
      EXPECT_PIXEL_COLOR_EQ(0, 0, blue);
  
      EXPECT_GL_NO_ERROR();
  }
  
  // Test that recreating a texture with GenerateMipmaps signals the FBO is dirty.
  TEST_P(StateChangeRenderTest, GenerateMipmap)
  {
      glBindFramebuffer(GL_FRAMEBUFFER, mFramebuffer);
  
      glBindTexture(GL_TEXTURE_2D, mTextures[0]);
      glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 16, 16, 0, GL_RGBA, GL_UNSIGNED_BYTE, nullptr);
      glTexImage2D(GL_TEXTURE_2D, 1, GL_RGBA, 8, 8, 0, GL_RGBA, GL_UNSIGNED_BYTE, nullptr);
      glTexImage2D(GL_TEXTURE_2D, 2, GL_RGBA, 4, 4, 0, GL_RGBA, GL_UNSIGNED_BYTE, nullptr);
      glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, mTextures[0], 0);
  
      // Draw once to set the RenderTarget in D3D11
      GLColor red(255, 0, 0, 255);
      setUniformColor(red);
      drawQuad(mProgram, "position", 0.5f);
      EXPECT_PIXEL_COLOR_EQ(0, 0, red);
  
      // This will trigger the texture to be re-created on FL9_3.
      glGenerateMipmap(GL_TEXTURE_2D);
  
      // Now ensure we don't have a stale render target.
      GLColor blue(0, 0, 255, 255);
      setUniformColor(blue);
      drawQuad(mProgram, "position", 0.5f);
      EXPECT_PIXEL_COLOR_EQ(0, 0, blue);
  
      EXPECT_GL_NO_ERROR();
  }
  
  ANGLE_INSTANTIATE_TEST(StateChangeTest, ES2_D3D9(), ES2_D3D11(), ES2_OPENGL());
  ANGLE_INSTANTIATE_TEST(StateChangeRenderTest,
                         ES2_D3D9(),
                         ES2_D3D11(),
                         ES2_OPENGL(),
                         ES2_D3D11_FL9_3());
  ANGLE_INSTANTIATE_TEST(StateChangeTestES3, ES3_D3D11(), ES3_OPENGL());
  

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