SurfacelessSurfaces for Mus

components/mus/surfaces/direct_output_surface_ozone.h

+// 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.
+
+#ifndef COMPONENTS_MUS_SURFACES_DIRECT_OUTPUT_SURFACE_OZONE_H_
+#define COMPONENTS_MUS_SURFACES_DIRECT_OUTPUT_SURFACE_OZONE_H_
+
+#include <memory>
+
+#include "base/memory/weak_ptr.h"
+#include "cc/output/context_provider.h"
+#include "cc/output/output_surface.h"
+#include "ui/gfx/geometry/size.h"
+#include "ui/gfx/native_widget_types.h"
+#include "ui/gfx/swap_result.h"
+#include "ui/gl/gl_surface.h"
+
+namespace ui {
+class LatencyInfo;
+}  // namespace ui
+
+namespace cc {
+class CompositorFrame;
+}  // namespace cc
+
+namespace mus {
+
+class BufferQueue;
+class SurfacesContextProvider;
+
+// An OutputSurface implementation that directly draws and swap to a GL
+// "surfaceless" surface (aka one backed by a buffer managed explicitly in
+// mus/ozone. This class is adapted from
+// GpuSurfacelessBrowserCompositorOutputSurface.
+class DirectOutputSurfaceOzone : public cc::OutputSurface {
+ public:
+  DirectOutputSurfaceOzone(
+      const scoped_refptr<SurfacesContextProvider>& context_provider,
+      gfx::AcceleratedWidget widget,
+      uint32_t target,
+      uint32_t internalformat);
+
+  ~DirectOutputSurfaceOzone() override;
+
+  // TODO(rjkroege): Implement the equivalent of Reflector.
+
+ private:
+  // cc::OutputSurface implementation.
+  void SwapBuffers(cc::CompositorFrame* frame) override;
+  void BindFramebuffer() override;
+  void Reshape(const gfx::Size& size, float scale_factor, bool alpha) override;
+  bool IsDisplayedAsOverlayPlane() const override;
+  unsigned GetOverlayTextureId() const override;
+  bool BindToClient(cc::OutputSurfaceClient* client) override;
+
+  // Taken from BrowserCompositor specific API.
+  void OnUpdateVSyncParametersFromGpu(base::TimeTicks timebase,
+                                      base::TimeDelta interval);
+
+  // Called when a swap completion is sent from the GPU process.
+  void OnGpuSwapBuffersCompleted(gfx::SwapResult result);
+
+  std::unique_ptr<BufferQueue> output_surface_;
+
+  base::WeakPtrFactory<DirectOutputSurfaceOzone> weak_ptr_factory_;
+};
+
+}  // namespace mus
+
+#endif  // COMPONENTS_MUS_SURFACES_DIRECT_OUTPUT_SURFACE_OZONE_H_