content/browser/renderer_host/backing_store_gtk.h

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef CONTENT_BROWSER_RENDERER_HOST_BACKING_STORE_GTK_H_
   6 #define CONTENT_BROWSER_RENDERER_HOST_BACKING_STORE_GTK_H_
   7
   8 #include <vector>
   9
  10 #include "base/basictypes.h"
  11 #include "base/compiler_specific.h"
  12 #include "build/build_config.h"
  13 #include "content/browser/renderer_host/backing_store.h"
  14 #include "content/common/content_export.h"
  15 #include "ui/base/x/x11_util.h"
  16
  17 namespace gfx {
  18 class Point;
  19 class Rect;
  20 }
  21
  22 typedef struct _GdkDrawable GdkDrawable;
  23
  24 namespace content {
  25
  26 class CONTENT_EXPORT BackingStoreGtk : public BackingStore {
  27  public:
  28   // Create a backing store on the X server. The visual is an Xlib Visual
  29   // describing the format of the target window and the depth is the color
  30   // depth of the X window which will be drawn into.
  31   BackingStoreGtk(RenderWidgetHost* widget,
  32                   const gfx::Size& size,
  33                   void* visual,
  34                   int depth);
  35
  36   // This is for unittesting only. An object constructed using this constructor
  37   // will silently ignore all paints
  38   BackingStoreGtk(RenderWidgetHost* widget, const gfx::Size& size);
  39
  40   virtual ~BackingStoreGtk();
  41
  42   Display* display() const { return display_; }
  43   XID root_window() const { return root_window_; }
  44
  45   // Copy from the server-side backing store to the target window
  46   //   origin: the destination rectangle origin
  47   //   damage: the area to copy
  48   //   target: the X id of the target window
  49   void XShowRect(const gfx::Point &origin, const gfx::Rect& damage,
  50                  XID target);
  51
  52   // As above, but use Cairo instead of Xlib.
  53   void CairoShowRect(const gfx::Rect& damage, GdkDrawable* drawable);
  54
  55 #if defined(TOOLKIT_GTK)
  56   // Paint the backing store into the target's |dest_rect|.
  57   void PaintToRect(const gfx::Rect& dest_rect, GdkDrawable* target);
  58 #endif
  59
  60   // BackingStore implementation.
  61   virtual size_t MemorySize() OVERRIDE;
  62   virtual void PaintToBackingStore(
  63       RenderProcessHost* process,
  64       TransportDIB::Id bitmap,
  65       const gfx::Rect& bitmap_rect,
  66       const std::vector<gfx::Rect>& copy_rects,
  67       float scale_factor,
  68       const base::Closure& completion_callback,
  69       bool* scheduled_completion_callback) OVERRIDE;
  70   virtual bool CopyFromBackingStore(const gfx::Rect& rect,
  71                                     skia::PlatformBitmap* output) OVERRIDE;
  72   virtual void ScrollBackingStore(const gfx::Vector2d& delta,
  73                                   const gfx::Rect& clip_rect,
  74                                   const gfx::Size& view_size) OVERRIDE;
  75
  76  private:
  77   // Paints the bitmap from the renderer onto the backing store without
  78   // using Xrender to composite the pixmaps.
  79   void PaintRectWithoutXrender(TransportDIB* bitmap,
  80                                const gfx::Rect& bitmap_rect,
  81                                const std::vector<gfx::Rect>& copy_rects);
  82
  83   // This is the connection to the X server where this backing store will be
  84   // displayed.
  85   Display* const display_;
  86   // What flavor, if any, MIT-SHM (X shared memory) support we have.
  87   const ui::SharedMemorySupport shared_memory_support_;
  88   // If this is true, then we can use Xrender to composite our pixmaps.
  89   const bool use_render_;
  90   // If |use_render_| is false, this is the number of bits-per-pixel for |depth|
  91   int pixmap_bpp_;
  92   // if |use_render_| is false, we need the Visual to get the RGB masks.
  93   void* const visual_;
  94   // This is the depth of the target window.
  95   const int visual_depth_;
  96   // The parent window (probably a GtkDrawingArea) for this backing store.
  97   const XID root_window_;
  98   // This is a handle to the server side pixmap which is our backing store.
  99   XID pixmap_;
 100   // This is the RENDER picture pointing at |pixmap_|.
 101   XID picture_;
 102   // This is a default graphic context, used in XCopyArea
 103   void* pixmap_gc_;
 104
 105   DISALLOW_COPY_AND_ASSIGN(BackingStoreGtk);
 106 };
 107
 108 }  // namespace content
 109
 110 #endif  // CONTENT_BROWSER_RENDERER_HOST_BACKING_STORE_GTK_H_