Issue #1829 - Revert "Issue #1751"

gfx/layers/opengl/GLManager.cpp

@@ -0,0 +1,70 @@
+/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "GLManager.h"
+#include "CompositorOGL.h"              // for CompositorOGL
+#include "GLContext.h"                  // for GLContext
+#include "mozilla/Attributes.h"         // for override
+#include "mozilla/RefPtr.h"             // for RefPtr
+#include "mozilla/layers/Compositor.h"  // for Compositor
+#include "mozilla/layers/LayerManagerComposite.h"
+#include "mozilla/layers/LayersTypes.h"
+#include "mozilla/mozalloc.h"           // for operator new, etc
+
+using namespace mozilla::gl;
+
+namespace mozilla {
+namespace layers {
+
+class GLManagerCompositor : public GLManager
+{
+public:
+  explicit GLManagerCompositor(CompositorOGL* aCompositor)
+    : mImpl(aCompositor)
+  {}
+
+  virtual GLContext* gl() const override
+  {
+    return mImpl->gl();
+  }
+
+  virtual void ActivateProgram(ShaderProgramOGL *aProg) override
+  {
+    mImpl->ActivateProgram(aProg);
+  }
+
+  virtual ShaderProgramOGL* GetProgram(GLenum aTarget, gfx::SurfaceFormat aFormat) override
+  {
+    ShaderConfigOGL config = ShaderConfigFromTargetAndFormat(aTarget, aFormat);
+    return mImpl->GetShaderProgramFor(config);
+  }
+
+  virtual const gfx::Matrix4x4& GetProjMatrix() const override
+  {
+    return mImpl->GetProjMatrix();
+  }
+
+  virtual void BindAndDrawQuad(ShaderProgramOGL *aProg,
+                               const gfx::Rect& aLayerRect,
+                               const gfx::Rect& aTextureRect) override
+  {
+    mImpl->BindAndDrawQuad(aProg, aLayerRect, aTextureRect);
+  }
+
+private:
+  RefPtr<CompositorOGL> mImpl;
+};
+
+/* static */ GLManager*
+GLManager::CreateGLManager(LayerManagerComposite* aManager)
+{
+  if (aManager && aManager->GetCompositor()->GetBackendType() == LayersBackend::LAYERS_OPENGL) {
+    return new GLManagerCompositor(aManager->GetCompositor()->AsCompositorOGL());
+  }
+  return nullptr;
+}
+
+} // namespace layers
+} // namespace mozilla