PPB_CursorControl_Dev.SetCursor: Add support for custom cursor.

webkit/plugins/ppapi/ppapi_plugin_instance.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 "webkit/plugins/ppapi/ppapi_plugin_instance.h"
 
 #include "base/logging.h"
 #include "base/message_loop.h"
 #include "base/metrics/histogram.h"
 #include "base/scoped_ptr.h"
@@ skipping 526 matching lines @@
     if (!graphics_3d->BindToInstance(true))
       return false;
 
     setBackingTextureId(graphics_3d->GetBackingTextureId());
     bound_graphics_ = graphics_3d;
   }
 
   return true;
 }
 
-bool PluginInstance::SetCursor(PP_CursorType_Dev type) {
-  if (type == PP_CURSORTYPE_CUSTOM) {
-    // TODO(neb): implement custom cursors.
-    // (Remember that PP_CURSORTYPE_CUSTOM != WebCursorInfo::TypeCustom.)
+bool PluginInstance::SetCursor(PP_CursorType_Dev type,
+                               PP_Resource custom_image,
+                               const PP_Point* hot_spot) {
+  if (type != PP_CURSORTYPE_CUSTOM) {
+    cursor_.reset(new WebCursorInfo(static_cast<WebCursorInfo::Type>(type)));
+    return true;
+  }
+
+  if (!hot_spot)
+    return false;
+
+  scoped_refptr<PPB_ImageData_Impl> image_data(
+      Resource::GetAs<PPB_ImageData_Impl>(custom_image));
+  if (!image_data.get())
+    return false;
+
+  if (image_data->format() != PPB_ImageData_Impl::GetNativeImageDataFormat()) {
+    // TODO(yzshen): Handle the case that the image format is different from the
+    // native format.
     NOTIMPLEMENTED();
     return false;
   }
-  cursor_.reset(new WebCursorInfo(static_cast<WebCursorInfo::Type>(type)));
+
+  ImageDataAutoMapper auto_mapper(image_data);
+  if (!auto_mapper.is_valid())
+    return false;
+
+  scoped_ptr<WebCursorInfo> custom_cursor(
+      new WebCursorInfo(WebCursorInfo::TypeCustom));
+  custom_cursor->hotSpot.x = hot_spot->x;
+  custom_cursor->hotSpot.y = hot_spot->y;
+
+#if WEBKIT_USING_SKIA
+  const SkBitmap* bitmap = image_data->GetMappedBitmap();
+  // Make a deep copy, so that the cursor remains valid even after the original
+  // image data gets freed.
+  if (!bitmap->copyTo(&custom_cursor->customImage.getSkBitmap(),
+                      bitmap->config())) {
+    return false;
+  }
+#elif WEBKIT_USING_CG
+  // TODO(yzshen): Implement it.
+  NOTIMPLEMENTED();
+  return false;
+#endif
+
+  cursor_.reset(custom_cursor.release());
   return true;
 }
 
 PP_Var PluginInstance::ExecuteScript(PP_Var script, PP_Var* exception) {
   TryCatch try_catch(module(), exception);
   if (try_catch.has_exception())
     return PP_MakeUndefined();
 
   // Convert the script into an inconvenient NPString object.
   scoped_refptr<StringVar> script_string(StringVar::FromPPVar(script));
@@ skipping 790 matching lines @@
   return found->second;
 }
 
 bool PluginInstance::IsFullPagePlugin() const {
   WebFrame* frame = container()->element().document().frame();
   return frame->view()->mainFrame()->document().isPluginDocument();
 }
 
 }  // namespace ppapi
 }  // namespace webkit