GTK: Move CairoCachedSurface from being owned by GtkThemeService to gfx::Image.

chrome/browser/ui/gtk/cairo_cached_surface.cc

-// 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.
-
-#include "chrome/browser/ui/gtk/cairo_cached_surface.h"
-
-#include <gtk/gtk.h>
-
-#include "base/basictypes.h"
-#include "base/logging.h"
-
-CairoCachedSurface::CairoCachedSurface() : pixbuf_(NULL), surface_(NULL) {
-}
-
-CairoCachedSurface::~CairoCachedSurface() {
-  Reset();
-}
-
-void CairoCachedSurface::Reset() {
-  if (surface_) {
-    cairo_surface_destroy(surface_);
-    surface_ = NULL;
-  }
-
-  if (pixbuf_) {
-    g_object_unref(pixbuf_);
-    pixbuf_ = NULL;
-  }
-}
-
-int CairoCachedSurface::Width() const {
-  return pixbuf_ ? gdk_pixbuf_get_width(pixbuf_) : -1;
-}
-
-int CairoCachedSurface::Height() const {
-  return pixbuf_ ? gdk_pixbuf_get_height(pixbuf_) : -1;
-}
-
-void CairoCachedSurface::UsePixbuf(GdkPixbuf* pixbuf) {
-  if (surface_) {
-    cairo_surface_destroy(surface_);
-    surface_ = NULL;
-  }
-
-  if (pixbuf)
-    g_object_ref(pixbuf);
-
-  if (pixbuf_)
-    g_object_unref(pixbuf_);
-
-  pixbuf_ = pixbuf;
-}
-
-void CairoCachedSurface::SetSource(cairo_t* cr, int x, int y) {
-  DCHECK(pixbuf_);
-  DCHECK(cr);
-
-  EnsureSurfaceValid(cr);
-  cairo_set_source_surface(cr, surface_, x, y);
-}
-
-void CairoCachedSurface::MaskSource(cairo_t* cr, int x, int y) {
-  DCHECK(pixbuf_);
-  DCHECK(cr);
-
-  EnsureSurfaceValid(cr);
-  cairo_mask_surface(cr, surface_, x, y);
-}
-
-void CairoCachedSurface::EnsureSurfaceValid(cairo_t* cr) {
-  if (!surface_) {
-    // First time here since last UsePixbuf call. Generate the surface.
-    cairo_surface_t* target = cairo_get_target(cr);
-    surface_ = cairo_surface_create_similar(
-        target,
-        CAIRO_CONTENT_COLOR_ALPHA,
-        gdk_pixbuf_get_width(pixbuf_),
-        gdk_pixbuf_get_height(pixbuf_));
-
-    DCHECK(surface_);
-#if !defined(NDEBUG)
-    int surface_type = cairo_surface_get_type(surface_);
-    DCHECK(surface_type == CAIRO_SURFACE_TYPE_XLIB ||
-           surface_type == CAIRO_SURFACE_TYPE_XCB ||
-           surface_type == CAIRO_SURFACE_TYPE_IMAGE);
-#endif
-
-    cairo_t* copy_cr = cairo_create(surface_);
-    gdk_cairo_set_source_pixbuf(copy_cr, pixbuf_, 0, 0);
-    cairo_paint(copy_cr);
-    cairo_destroy(copy_cr);
-  }
-}