gpu: Add a new extension CHROMIUM_deschedule.

gpu/command_buffer/tests/gl_deschedule_unittest.cc

+// Copyright 2016 The Chromium 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 <GLES2/gl2.h>
+#include <GLES2/gl2ext.h>
+#include <GLES2/gl2extchromium.h>
+
+#include "gpu/command_buffer/tests/gl_manager.h"
+#include "gpu/command_buffer/tests/gl_test_utils.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace gpu {
+
+class GLDescheduleTest : public testing::Test {
+ protected:
+  void SetUp() override {
+    GLManager::Options options;
+    gl1_.Initialize(options);
+  }
+
+  void TearDown() override {
+    gl1_.Destroy();
+  }
+
+  GLManager gl1_;
+};
+
+TEST_F(GLDescheduleTest, Deschedule) {
+  gl1_.MakeCurrent();
+
+  GLuint tex = 0;
+  glGenTextures(1, &tex);
+  glBindTexture(GL_TEXTURE_2D, tex);
+  glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 1, 1, 0, GL_RGBA, GL_UNSIGNED_BYTE,
+               NULL);
+
+  GLuint fbo = 0;
+  glGenFramebuffers(1, &fbo);
+  glBindFramebuffer(GL_FRAMEBUFFER, fbo);
+  glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D,
+                         tex, 0);
+
+  glClearColor(1.0f, 0.0f, 0.0f, 1.0f);
+  glClear(GL_COLOR_BUFFER_BIT);
+  glDescheduleUntilFinishedCHROMIUM();
+  glClearColor(0.0f, 0.0f, 1.0f, 1.0f);
+  glClear(GL_COLOR_BUFFER_BIT);
+  glFlush();
+  glClearColor(0.0f, 1.0f, 0.0f, 1.0f);
+  glClear(GL_COLOR_BUFFER_BIT);
+  glFlush();
+
+  uint32_t result;
+  glReadPixels(0, 0, 1, 1, GL_RGBA, GL_UNSIGNED_BYTE,
+               &result);
+  EXPECT_EQ(0xFF00FF00u, result);
+
+  // GLManager doesn't implement the callbacks necessary to support
+  // glDescheduleUntilFinishedCHROMIUM, so there should be an error generated.
+  EXPECT_EQ(static_cast<GLenum>(GL_INVALID_OPERATION), glGetError());
+}
+
+}  // namespace gpu