More removal of GTK code.

ui/gfx/image/cairo_cached_surface.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 UI_GFX_IMAGE_CAIRO_CACHED_SURFACE_H_
-#define UI_GFX_IMAGE_CAIRO_CACHED_SURFACE_H_
-
-#include <vector>
-
-#include "ui/gfx/gfx_export.h"
-
-typedef struct _GdkDisplay GdkDisplay;
-typedef struct _GdkPixbuf GdkPixbuf;
-typedef struct _GtkWidget GtkWidget;
-typedef struct _cairo cairo_t;
-typedef struct _cairo_surface cairo_surface_t;
-
-namespace gfx {
-
-// A helper class that takes a GdkPixbuf* and renders it to the screen. Unlike
-// gdk_cairo_set_source_pixbuf(), CairoCachedSurface assumes that the pixbuf is
-// immutable after UsePixbuf() is called and can be sent to the display server
-// once. From then on, that cached version is used so we don't upload the same
-// image each and every time we expose.
-//
-// Most cached surfaces are owned by the GtkThemeService, which associates
-// them with a certain XDisplay. Some users of surfaces (CustomDrawButtonBase,
-// for example) own their surfaces instead since they interact with the
-// ResourceBundle instead of the GtkThemeService.
-class GFX_EXPORT CairoCachedSurface {
- public:
-  CairoCachedSurface();
-  ~CairoCachedSurface();
-
-  // Whether this CairoCachedSurface owns a GdkPixbuf.
-  bool valid() const {
-    return pixbuf_;
-  }
-
-  // Delete all our data.
-  void Reset();
-
-  // The dimensions of the underlying pixbuf/surface. (or -1 if invalid.)
-  int Width() const;
-  int Height() const;
-
-  // Sets the pixbuf that we pass to cairo. Calling UsePixbuf() only derefs the
-  // current pixbuf and surface (if they exist). Actually transfering data to
-  // the X server occurs at SetSource() time. Calling UsePixbuf() should only
-  // be done once as it clears cached data from the X server.
-  void UsePixbuf(GdkPixbuf* pixbuf);
-
-  // Sets our pixbuf as the active surface starting at (x, y), uploading it in
-  // case we don't have an X backed surface cached.
-  void SetSource(cairo_t* cr, GtkWidget* widget, int x, int y) const;
-  void SetSource(cairo_t* cr, GdkDisplay* display, int x, int y) const;
-
-  // Performs a mask operation, using this surface as the alpha channel.
-  void MaskSource(cairo_t* cr, GtkWidget* widget, int x, int y) const;
-  void MaskSource(cairo_t* cr, GdkDisplay* display, int x, int y) const;
-
-  // Raw access to the pixbuf. May be NULL. Used for a few gdk operations
-  // regarding window shaping.
-  GdkPixbuf* pixbuf() { return pixbuf_; }
-
- private:
-  typedef std::vector<std::pair<GdkDisplay*, cairo_surface_t*> > SurfaceVector;
-
-  // Returns a surface . Caches results so only one copy of the image data
-  // lives on the display server.
-  cairo_surface_t* GetSurfaceFor(cairo_t* cr, GdkDisplay* display) const;
-
-  // The source pixbuf.
-  GdkPixbuf* pixbuf_;
-
-  // Our list of cached surfaces. 99% of the time, this will only contain a
-  // single entry. At most two. We need to get this right for multiple displays
-  // to work correct, since each GdkDisplay is a different display server.
-  mutable SurfaceVector surface_map_;
-};
-
-}  // namespace gfx
-
-#endif  // UI_GFX_IMAGE_CAIRO_CACHED_SURFACE_H_