Inform webkit when PPAPI plugin contents are opaque.

webkit/plugins/ppapi/ppapi_plugin_instance.cc

 // 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.
 
 #include "webkit/plugins/ppapi/ppapi_plugin_instance.h"
 
 #include "base/bind.h"
 #include "base/debug/trace_event.h"
 #include "base/logging.h"
 #include "base/memory/linked_ptr.h"
@@ skipping 1605 matching lines @@
 
 PPB_Graphics3D_Impl* PluginInstance::GetBoundGraphics3D() const {
   if (bound_graphics_.get() == NULL)
     return NULL;
 
   if (bound_graphics_->AsPPB_Graphics3D_API())
     return static_cast<PPB_Graphics3D_Impl*>(bound_graphics_.get());
   return NULL;
 }
 
-void PluginInstance::setBackingTextureId(unsigned int id) {
+void PluginInstance::setBackingTextureId(unsigned int id, bool isOpaque) {
   // If we have a fullscreen_container_ (under PPB_FlashFullscreen)
   // or desired_fullscreen_state is true (under PPB_Fullscreen),
   // then the plugin is fullscreen or transitioning to fullscreen
   // and the parent context is not the one for the browser page,
   // but for the fullscreen window, and so the parent texture ID
   // doesn't correspond to anything in the page's context.
   //
   // TODO(alokp): It would be better at some point to have the equivalent
   // in the FullscreenContainer so that we don't need to poll
   if (fullscreen_container_ || desired_fullscreen_state_)
     return;
 
-  if (container_)
+  if (container_) {
     container_->setBackingTextureId(id);
+    container_->setOpaque(isOpaque);
+  }
 }
 
 void PluginInstance::AddPluginObject(PluginObject* plugin_object) {
   DCHECK(live_plugin_objects_.find(plugin_object) ==
          live_plugin_objects_.end());
   live_plugin_objects_.insert(plugin_object);
 }
 
 void PluginInstance::RemovePluginObject(PluginObject* plugin_object) {
   // Don't actually verify that the object is in the set since during module
@@ skipping 55 matching lines @@
     if (GetBoundGraphics2D()) {
       GetBoundGraphics2D()->BindToInstance(NULL);
     } else if (GetBoundGraphics3D()) {
       GetBoundGraphics3D()->BindToInstance(false);
     }
     bound_graphics_ = NULL;
   }
 
   // Special-case clearing the current device.
   if (!device) {
-    setBackingTextureId(0);
+    setBackingTextureId(0, false);
     InvalidateRect(gfx::Rect());
     return PP_TRUE;
   }
 
   // Refuse to bind if in transition to fullscreen with PPB_FlashFullscreen or
   // to/from fullscreen with PPB_Fullscreen.
   if ((fullscreen_container_ && !flash_fullscreen_) ||
       desired_fullscreen_state_ != view_data_.is_fullscreen)
     return PP_FALSE;
 
   EnterResourceNoLock<PPB_Graphics2D_API> enter_2d(device, false);
   PPB_Graphics2D_Impl* graphics_2d = enter_2d.succeeded() ?
       static_cast<PPB_Graphics2D_Impl*>(enter_2d.object()) : NULL;
   EnterResourceNoLock<PPB_Graphics3D_API> enter_3d(device, false);
   PPB_Graphics3D_Impl* graphics_3d = enter_3d.succeeded() ?
       static_cast<PPB_Graphics3D_Impl*>(enter_3d.object()) : NULL;
 
   if (graphics_2d) {
     if (graphics_2d->pp_instance() != pp_instance())
       return PP_FALSE;  // Can't bind other instance's contexts.
     if (!graphics_2d->BindToInstance(this))
       return PP_FALSE;  // Can't bind to more than one instance.
 
     bound_graphics_ = graphics_2d;
-    setBackingTextureId(0);
+    setBackingTextureId(0, graphics_2d->is_always_opaque());
     // BindToInstance will have invalidated the plugin if necessary.
   } else if (graphics_3d) {
     // Make sure graphics can only be bound to the instance it is
     // associated with.
     if (graphics_3d->pp_instance() != pp_instance())
       return PP_FALSE;
     if (!graphics_3d->BindToInstance(true))
       return PP_FALSE;
 
     bound_graphics_ = graphics_3d;
-    setBackingTextureId(graphics_3d->GetBackingTextureId());
+    setBackingTextureId(graphics_3d->GetBackingTextureId(),
+                        graphics_3d->IsOpaque());
   } else {
     // The device is not a valid resource type.
     return PP_FALSE;
   }
 
   return PP_TRUE;
 }
 
 PP_Bool PluginInstance::IsFullFrame(PP_Instance instance) {
   return PP_FromBool(full_frame());
@@ skipping 314 matching lines @@
   screen_size_for_fullscreen_ = gfx::Size();
   WebElement element = container_->element();
   element.setAttribute(WebString::fromUTF8(kWidth), width_before_fullscreen_);
   element.setAttribute(WebString::fromUTF8(kHeight), height_before_fullscreen_);
   element.setAttribute(WebString::fromUTF8(kBorder), border_before_fullscreen_);
   element.setAttribute(WebString::fromUTF8(kStyle), style_before_fullscreen_);
 }
 
 }  // namespace ppapi
 }  // namespace webkit