Improving the decoder pipeline.

remoting/client/frame_producer.h

+// Copyright (c) 2012 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 REMOTING_CLIENT_FRAME_PRODUCER_H_
+#define REMOTING_CLIENT_FRAME_PRODUCER_H_
+
+#include "base/callback_forward.h"
+#include "third_party/skia/include/core/SkRect.h"
+#include "third_party/skia/include/core/SkRegion.h"
+#include "third_party/skia/include/core/SkSize.h"
+
+namespace pp {
+class ImageData;
+} // namespace pp
+
+namespace remoting {
+
+class FrameProducer {
+ public:
+  FrameProducer() {}
+  virtual ~FrameProducer() {}
+
+  // Adds an image buffer to the pool of pending buffers for subsequent drawing.
+  // Once drawing is completed the buffer will be returned to the consumer via
+  // the FrameConsumer::ApplyBuffer() call. Alternatively an empty buffer could
+  // be returned via the FrameConsumer::ReturnBuffer() call.
+  //
+  // The passed buffer must be large enough to hold the whole clipping area.
+  virtual void DrawBuffer(pp::ImageData* buffer) = 0;
+
+  // Requests repainting of the specified |region| of the frame as soon as
+  // possible. |region| is specified in output coordinates relative to
+  // the beginning of the frame.
+  virtual void InvalidateRegion(const SkRegion& region) = 0;
+
+  // Requests returing of all pending buffers to the consumer via
+  // FrameConsumer::ReturnBuffer() calls.
+  virtual void RequestReturnBuffers(const base::Closure& done) = 0;
+
+  // Notifies the producer of changes to the output view size or clipping area.
+  virtual void SetOutputSizeAndClip(const SkISize& view_size,
+                                    const SkIRect& clip_area) = 0;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(FrameProducer);
+};
+
+}  // namespace remoting
+
+#endif  // REMOTING_CLIENT_FRAME_PRODUCER_H_