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// Copyright (c) 2011 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.
// This class is an implementation of the ChromotingView using Pepper devices
// as the backing stores. This class is used only on pepper thread.
// Chromoting objects access this object through PepperViewProxy which
// delegates method calls on the pepper thread.
#ifndef REMOTING_CLIENT_PLUGIN_PEPPER_VIEW_H_
#define REMOTING_CLIENT_PLUGIN_PEPPER_VIEW_H_
#include "base/memory/scoped_ptr.h"
#include "base/task.h"
#include "media/base/video_frame.h"
#include "ppapi/cpp/graphics_2d.h"
#include "remoting/client/chromoting_view.h"
#include "remoting/client/frame_consumer.h"
namespace remoting {
class ChromotingInstance;
class ClientContext;
class PepperView : public ChromotingView,
public FrameConsumer {
public:
// Constructs a PepperView that draws to the |rendering_device|. The
// |rendering_device| instance must outlive this class.
PepperView(ChromotingInstance* instance, ClientContext* context);
virtual ~PepperView();
// ChromotingView implementation.
virtual bool Initialize() OVERRIDE;
virtual void TearDown() OVERRIDE;
virtual void Paint() OVERRIDE;
virtual void SetSolidFill(uint32 color) OVERRIDE;
virtual void UnsetSolidFill() OVERRIDE;
virtual void SetConnectionState(ConnectionState state) OVERRIDE;
virtual void UpdateLoginStatus(bool success, const std::string& info)
OVERRIDE;
virtual void SetViewport(int x, int y, int width, int height) OVERRIDE;
virtual gfx::Point ConvertScreenToHost(const gfx::Point& p) const OVERRIDE;
// FrameConsumer implementation.
virtual void AllocateFrame(media::VideoFrame::Format format,
size_t width,
size_t height,
base::TimeDelta timestamp,
base::TimeDelta duration,
scoped_refptr<media::VideoFrame>* frame_out,
Task* done);
virtual void ReleaseFrame(media::VideoFrame* frame);
virtual void OnPartialFrameOutput(media::VideoFrame* frame,
UpdatedRects* rects,
Task* done);
// Sets the size of the visible screen area that this object can render into.
void SetScreenSize(int width, int height);
// Sets whether the host screen is scaled to fit the visible screen area.
void SetScaleToFit(bool enabled);
private:
void OnPaintDone(base::Time paint_start);
void OnRefreshPaintDone();
void PaintFrame(media::VideoFrame* frame, UpdatedRects* rects);
// Blits the pixels in |r| in the backing store into the corresponding
// rectangle in the scaled backing store. Returns that rectangle.
gfx::Rect UpdateScaledBackingStore(const gfx::Rect& r);
// Blanks out a rectangle in an image.
void BlankRect(pp::ImageData& image_data, const gfx::Rect& rect);
// Converts host co-ordinates to screen co-ordinates.
gfx::Point ConvertHostToScreen(const gfx::Point& p) const;
// Sets the screen scale. A value of 1.0 indicates no scaling.
void SetScreenScale(double screen_scale);
// Paints the entire host screen.
// This is called, for example, when the screen scale is changed.
void RefreshPaint();
// Resizes internals of this object after the host screen size has changed,
// or the scale applied to that screen has changed.
// More specifically, pepper's graphics object, the backing stores, and the
// scaling cache are resized and/or recalculated.
void ResizeInternals();
// Whether to scale the screen.
bool DoScaling() const;
// Reference to the creating plugin instance. Needed for interacting with
// pepper. Marking explicitly as const since it must be initialized at
// object creation, and never change.
ChromotingInstance* const instance_;
// Context should be constant for the lifetime of the plugin.
ClientContext* const context_;
pp::Graphics2D graphics2d_;
// A backing store that saves the current desktop image.
scoped_ptr<pp::ImageData> backing_store_;
// A scaled copy of the backing store.
scoped_ptr<pp::ImageData> scaled_backing_store_;
// The factor by which to scale the host screen. A value of 1.0 indicates
// no scaling.
double screen_scale_;
// An array containing the x co-ordinate of the point on the host screen
// corresponding to the point (i, 0) on the client screen.
scoped_array<int> screen_x_to_host_x_;
// Whether to scale to fit.
bool scale_to_fit_;
// The size of the host screen.
int host_width_;
int host_height_;
// The size of the visible area on the client screen that can be used to
// display the host screen.
int client_width_;
int client_height_;
bool is_static_fill_;
uint32 static_fill_color_;
ScopedRunnableMethodFactory<PepperView> task_factory_;
DISALLOW_COPY_AND_ASSIGN(PepperView);
};
} // namespace remoting
#endif // REMOTING_CLIENT_PLUGIN_PEPPER_VIEW_H_
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