Initial checkin of chromecast content embedder (cast_shell) and related build scripts.

chromecast/ui/gl/gl_implementation_cast.cc

+// Copyright (c) 2014 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 <vector>
+
+#include "base/memory/ref_counted.h"
+#include "ui/gl/gl_bindings.h"
+#include "ui/gl/gl_context_stub_with_extensions.h"
+#include "ui/gl/gl_gl_api_implementation.h"
+#include "ui/gl/gl_implementation.h"
+
+namespace gfx {
+// We are pushing an implementation even though we do not support any GL on
+// Chromecast, because the caller GetAllowedGLImplementations assumes that this
+// function always adds at least one implementation and would perform an OOB
+// read anyway.
+// At this point, placing None as an implementation is incorrect but, this
+// will force the GPU process to fail its initialization and basically disable
+// all HW rendering which is the end result we are looking for.
+void GetAllowedGLImplementations(std::vector<GLImplementation>* impls) {
+  impls->push_back(kGLImplementationNone);
+}
+
+bool InitializeStaticGLBindings(GLImplementation implementation) {
+  // Prevent reinitialization with a different implementation. Once the gpu
+  // unit tests have initialized with kGLImplementationMock, we don't want to
+  // later switch to another GL implementation.
+  if (GetGLImplementation() != kGLImplementationNone)
+    return true;
+
+  switch (implementation) {
+    case kGLImplementationMockGL: {
+      SetGLImplementation(kGLImplementationMockGL);
+      InitializeStaticGLBindingsGL();
+      break;
+    }
+    default:
+      return false;
+  }
+
+  return true;
+}
+
+bool InitializeDynamicGLBindings(GLImplementation implementation,
+                                 GLContext* context) {
+  switch (implementation) {
+    case kGLImplementationMockGL:
+      if (!context) {
+        scoped_refptr<GLContextStubWithExtensions> mock_context(
+            new GLContextStubWithExtensions());
+        mock_context->SetGLVersionString("3.0");
+        InitializeDynamicGLBindingsGL(mock_context.get());
+      } else
+        InitializeDynamicGLBindingsGL(context);
+      break;
+    default:
+      return false;
+  }
+
+  return true;
+}
+
+void InitializeDebugGLBindings() {
+  InitializeDebugGLBindingsGL();
+}
+
+void ClearGLBindings() {
+  ClearGLBindingsGL();
+  SetGLImplementation(kGLImplementationNone);
+
+  UnloadGLNativeLibraries();
+}
+
+bool GetGLWindowSystemBindingInfo(GLWindowSystemBindingInfo* info) {
+  return false;
+}
+
+}  // namespace gfx