Refactor blits

chrome/plugin/webplugin_proxy.cc

 // Copyright (c) 2009 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/plugin/webplugin_proxy.h"
 
 #include "app/gfx/canvas.h"
 #if defined(OS_WIN)
 #include "app/win_util.h"
 #endif
+#include "base/gfx/blit.h"
 #include "base/scoped_handle.h"
 #include "base/shared_memory.h"
 #include "base/singleton.h"
 #include "base/waitable_event.h"
 #include "build/build_config.h"
 #include "chrome/common/child_process_logging.h"
 #include "chrome/common/plugin_messages.h"
 #include "chrome/common/url_constants.h"
 #include "chrome/plugin/npobject_proxy.h"
 #include "chrome/plugin/npobject_util.h"
@@ skipping 396 matching lines @@
     scoped_cftyperef<CGImageRef> image(
         CGBitmapContextCreateImage(background_context_));
     scoped_cftyperef<CGImageRef> sub_image(
         CGImageCreateWithImageInRect(image, rect.ToCGRect()));
     CGContextDrawImage(background_context_, rect.ToCGRect(), sub_image);
   }
   CGContextClipToRect(windowless_context_, rect.ToCGRect());
   delegate_->Paint(windowless_context_, rect);
   CGContextRestoreGState(windowless_context_);
 #else
+  if (background_canvas_.get()) {
+    BlitCanvasToCanvas(windowless_canvas_.get(), rect,
+                       background_canvas_.get(), rect.origin());
+  }
   cairo_t* cairo =
       windowless_canvas_->getTopPlatformDevice().beginPlatformPaint();
   cairo_save(cairo);
   cairo_rectangle(cairo, rect.x(), rect.y(), rect.width(), rect.height());
   cairo_clip(cairo);
-  if (background_canvas_.get()) {
-    cairo_t *background =
-        background_canvas_->getTopPlatformDevice().beginPlatformPaint();
-    cairo_set_source_surface(cairo, cairo_get_target(background), 0, 0);
-    cairo_paint(cairo);
-  }
   cairo_translate(cairo, -delegate_->GetRect().x(), -delegate_->GetRect().y());
   delegate_->Paint(cairo, offset_rect);
   cairo_restore(cairo);
 #endif
 }
 
 void WebPluginProxy::UpdateGeometry(
     const gfx::Rect& window_rect,
     const gfx::Rect& clip_rect,
     const TransportDIB::Handle& windowless_buffer,
@@ skipping 181 matching lines @@
   while (index != resource_clients_.end()) {
     WebPluginResourceClient* client = (*index).second;
 
     if (client == resource_client) {
       resource_clients_.erase(index++);
     } else {
       index++;
     }
   }
 }