Migrate Graphics2D to new design.

content/renderer/pepper/renderer_ppapi_host_impl.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 "content/renderer/pepper/renderer_ppapi_host_impl.h"
 
 #include "base/logging.h"
+#include "content/renderer/pepper/pepper_graphics_2d_host.h"
 #include "content/renderer/pepper/pepper_in_process_resource_creation.h"
 #include "content/renderer/pepper/pepper_in_process_router.h"
 #include "content/renderer/pepper/pepper_plugin_delegate_impl.h"
 #include "content/renderer/render_view_impl.h"
 #include "ppapi/proxy/host_dispatcher.h"
 #include "webkit/plugins/ppapi/host_globals.h"
+#include "webkit/plugins/ppapi/plugin_delegate.h"
 #include "webkit/plugins/ppapi/ppapi_plugin_instance.h"
 
 using webkit::ppapi::HostGlobals;
 using webkit::ppapi::PluginInstance;
 
 namespace content {
 
 // Out-of-process constructor.
 RendererPpapiHostImpl::RendererPpapiHostImpl(
     webkit::ppapi::PluginModule* module,
@@ skipping 68 matching lines @@
       instance->module()->GetEmbedderState());
 }
 
 scoped_ptr< ::ppapi::thunk::ResourceCreationAPI>
 RendererPpapiHostImpl::CreateInProcessResourceCreationAPI(
     webkit::ppapi::PluginInstance* instance) {
   return scoped_ptr< ::ppapi::thunk::ResourceCreationAPI>(
       new PepperInProcessResourceCreation(this, instance));
 }
 
-ppapi::host::PpapiHost* RendererPpapiHostImpl::GetPpapiHost() {
+ppapi::host::PpapiHost* RendererPpapiHostImpl::GetPpapiHost() const {
   return ppapi_host_.get();
 }
 
 RenderView* RendererPpapiHostImpl::GetRenderViewForInstance(
     PP_Instance instance) const {
   PluginInstance* instance_object = GetAndValidateInstance(instance);
   if (!instance_object)
     return NULL;
 
   // Since we're the embedder, we can make assumptions about the delegate on
   // the instance and get back to our RenderView.
   return static_cast<PepperPluginDelegateImpl*>(
       instance_object->delegate())->render_view();
 }
 
+webkit::ppapi::PluginDelegate::PlatformGraphics2D*
+RendererPpapiHostImpl::GetPlatformGraphics2D(
+    PP_Resource resource) const {
+  ppapi::host::PpapiHost* ppapi_host = GetPpapiHost();
+  // Make sure the resource from the plugin is a known one, so that we can cast
+  // it safely.
+  if (!ppapi_host->IsGraphics2DResource(resource)) {
+    LOG(ERROR) << "Resource is not Graphics2d";
+    return NULL;
+  }
+  return static_cast<PepperGraphics2DHost*>(
+      ppapi_host->GetResourceHost(resource));
+}
+
 bool RendererPpapiHostImpl::IsValidInstance(
     PP_Instance instance) const {
   return !!GetAndValidateInstance(instance);
 }
 
 bool RendererPpapiHostImpl::HasUserGesture(PP_Instance instance) const {
   PluginInstance* instance_object = GetAndValidateInstance(instance);
   if (!instance_object)
     return false;
 
   if (instance_object->module()->permissions().HasPermission(
           ppapi::PERMISSION_BYPASS_USER_GESTURE))
     return true;
   return instance_object->IsProcessingUserGesture();
 }
 
 PluginInstance* RendererPpapiHostImpl::GetAndValidateInstance(
     PP_Instance pp_instance) const {
   PluginInstance* instance = HostGlobals::Get()->GetInstance(pp_instance);
   if (!instance)
     return NULL;
   if (instance->module() != module_)
     return NULL;
   return instance;
 }
 
 }  // namespace content