Linux: server side backing stores

chrome/browser/renderer_host/render_widget_host.cc

 // Copyright (c) 2006-2008 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/renderer_host/render_widget_host.h"
 
 #include "base/gfx/native_widget_types.h"
 #include "base/message_loop.h"
 #include "base/keyboard_codes.h"
 #include "chrome/browser/renderer_host/backing_store.h"
@@ skipping 212 matching lines @@
       ViewHostMsg_PaintRect::Dispatch(
           &msg, this, &RenderWidgetHost::OnMsgPaintRect);
       suppress_view_updating_ = false;
       backing_store = BackingStoreManager::GetBackingStore(this, current_size_);
     }
   }
 
   return backing_store;
 }
 
+BackingStore* RenderWidgetHost::AllocBackingStore(const gfx::Size& size) {
+  if (!view_)
+    return NULL;
+
+  return view_->AllocBackingStore(size);
+}
+
 void RenderWidgetHost::StartHangMonitorTimeout(TimeDelta delay) {
   time_when_considered_hung_ = Time::Now() + delay;
 
   // If we already have a timer that will expire at or before the given delay,
   // then we have nothing more to do now.
   if (hung_renderer_timer_.IsRunning() &&
       hung_renderer_timer_.GetCurrentDelay() <= delay)
     return;
 
   // Either the timer is not yet running, or we need to adjust the timer to
@@ skipping 342 matching lines @@
                                              const gfx::Rect& bitmap_rect,
                                              const gfx::Size& view_size) {
   if (is_hidden_) {
     // Don't bother updating the backing store when we're hidden. Just mark it
     // as being totally invalid. This will cause a complete repaint when the
     // view is restored.
     needs_repainting_on_restore_ = true;
     return;
   }
 
-  // We use the view size according to the render view, which may not be
-  // quite the same as the size of our window.
-  gfx::Rect view_rect(0, 0, view_size.width(), view_size.height());
-
   bool needs_full_paint = false;
   BackingStore* backing_store =
-      BackingStoreManager::PrepareBackingStore(this, view_rect,
+      BackingStoreManager::PrepareBackingStore(this, view_size,
                                                process_->process().handle(),
                                                bitmap, bitmap_rect,
                                                &needs_full_paint);
   DCHECK(backing_store != NULL);
   if (needs_full_paint) {
     repaint_start_time_ = TimeTicks::Now();
     repaint_ack_pending_ = true;
     Send(new ViewMsg_Repaint(routing_id_, view_size));
   }
 }
@@ skipping 13 matching lines @@
 
   // TODO(darin): do we need to do something else if our backing store is not
   // the same size as the advertised view?  maybe we just assume there is a
   // full paint on its way?
   BackingStore* backing_store = BackingStoreManager::Lookup(this);
   if (!backing_store || (backing_store->size() != view_size))
     return;
   backing_store->ScrollRect(process_->process().handle(), bitmap, bitmap_rect,
                             dx, dy, clip_rect, view_size);
 }