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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.
#ifndef CONTENT_BROWSER_RENDERER_HOST_BACKING_STORE_GTK_H_
#define CONTENT_BROWSER_RENDERER_HOST_BACKING_STORE_GTK_H_
#pragma once
#include <vector>
#include "base/basictypes.h"
#include "build/build_config.h"
#include "content/browser/renderer_host/backing_store.h"
#include "content/common/content_export.h"
#include "ui/base/x/x11_util.h"
namespace gfx {
class Point;
class Rect;
} // namespace gfx
typedef struct _GdkDrawable GdkDrawable;
class CONTENT_EXPORT BackingStoreGtk : public BackingStore {
public:
// Create a backing store on the X server. The visual is an Xlib Visual
// describing the format of the target window and the depth is the color
// depth of the X window which will be drawn into.
BackingStoreGtk(RenderWidgetHost* widget,
const gfx::Size& size,
void* visual,
int depth);
// This is for unittesting only. An object constructed using this constructor
// will silently ignore all paints
BackingStoreGtk(RenderWidgetHost* widget, const gfx::Size& size);
virtual ~BackingStoreGtk();
Display* display() const { return display_; }
XID root_window() const { return root_window_; }
// Copy from the server-side backing store to the target window
// origin: the destination rectangle origin
// damage: the area to copy
// target: the X id of the target window
void XShowRect(const gfx::Point &origin, const gfx::Rect& damage,
XID target);
// As above, but use Cairo instead of Xlib.
void CairoShowRect(const gfx::Rect& damage, GdkDrawable* drawable);
#if defined(TOOLKIT_GTK)
// Paint the backing store into the target's |dest_rect|.
void PaintToRect(const gfx::Rect& dest_rect, GdkDrawable* target);
#endif
// BackingStore implementation.
virtual size_t MemorySize() OVERRIDE;
virtual void PaintToBackingStore(
content::RenderProcessHost* process,
TransportDIB::Id bitmap,
const gfx::Rect& bitmap_rect,
const std::vector<gfx::Rect>& copy_rects,
const base::Closure& completion_callback,
bool* scheduled_completion_callback) OVERRIDE;
virtual bool CopyFromBackingStore(const gfx::Rect& rect,
skia::PlatformCanvas* output) OVERRIDE;
virtual void ScrollBackingStore(int dx, int dy,
const gfx::Rect& clip_rect,
const gfx::Size& view_size) OVERRIDE;
private:
// Paints the bitmap from the renderer onto the backing store without
// using Xrender to composite the pixmaps.
void PaintRectWithoutXrender(TransportDIB* bitmap,
const gfx::Rect& bitmap_rect,
const std::vector<gfx::Rect>& copy_rects);
// This is the connection to the X server where this backing store will be
// displayed.
Display* const display_;
// What flavor, if any, MIT-SHM (X shared memory) support we have.
const ui::SharedMemorySupport shared_memory_support_;
// If this is true, then we can use Xrender to composite our pixmaps.
const bool use_render_;
// If |use_render_| is false, this is the number of bits-per-pixel for |depth|
int pixmap_bpp_;
// if |use_render_| is false, we need the Visual to get the RGB masks.
void* const visual_;
// This is the depth of the target window.
const int visual_depth_;
// The parent window (probably a GtkDrawingArea) for this backing store.
const XID root_window_;
// This is a handle to the server side pixmap which is our backing store.
XID pixmap_;
// This is the RENDER picture pointing at |pixmap_|.
XID picture_;
// This is a default graphic context, used in XCopyArea
void* pixmap_gc_;
DISALLOW_COPY_AND_ASSIGN(BackingStoreGtk);
};
#endif // CONTENT_BROWSER_RENDERER_HOST_BACKING_STORE_GTK_H_
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