Implement HiDPI support in Pepper dev interface

webkit/plugins/ppapi/ppb_graphics_2d_impl.h

 // 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.
 
 #ifndef WEBKIT_PLUGINS_PPAPI_PPB_GRAPHICS_2D_IMPL_H_
 #define WEBKIT_PLUGINS_PPAPI_PPB_GRAPHICS_2D_IMPL_H_
 
 #include <vector>
 
 #include "base/basictypes.h"
@@ skipping 15 matching lines @@
 class PPB_ImageData_Impl;
 class PluginInstance;
 
 class PPB_Graphics2D_Impl : public ::ppapi::Resource,
                             public ::ppapi::thunk::PPB_Graphics2D_API {
  public:
   virtual ~PPB_Graphics2D_Impl();
 
   static PP_Resource Create(PP_Instance instance,
                             const PP_Size& size,
-                            PP_Bool is_always_opaque);
+                            PP_Bool is_always_opaque,
+                            float scale);
 
   bool is_always_opaque() const { return is_always_opaque_; }
 
   // Resource overrides.
   virtual ::ppapi::thunk::PPB_Graphics2D_API* AsPPB_Graphics2D_API();
   virtual void LastPluginRefWasDeleted() OVERRIDE;
 
   // PPB_Graphics2D functions.
   virtual PP_Bool Describe(PP_Size* size, PP_Bool* is_always_opaque) OVERRIDE;
   virtual void PaintImageData(PP_Resource image_data,
@@ skipping 21 matching lines @@
   // These messages are used to send Flush callbacks to the plugin.
   void ViewWillInitiatePaint();
   void ViewInitiatedPaint();
   void ViewFlushedPaint();
 
   PPB_ImageData_Impl* image_data() { return image_data_.get(); }
 
  private:
   explicit PPB_Graphics2D_Impl(PP_Instance instance);
 
-  bool Init(int width, int height, bool is_always_opaque);
+  bool Init(int width, int height, bool is_always_opaque, float scale);
 
   // Tracks a call to flush that requires a callback.
   class FlushCallbackData {
    public:
     FlushCallbackData() {
       Clear();
     }
 
     explicit FlushCallbackData(
         scoped_refptr< ::ppapi::TrackedCallback> callback) {
@@ skipping 88 matching lines @@
 
   // When doing offscreen flushes, we issue a task that issues the callback
   // later. This is set when one of those tasks is pending so that we can
   // enforce the "only one pending flush at a time" constraint in the API.
   bool offscreen_flush_pending_;
 
   // Set to true if the plugin declares that this device will always be opaque.
   // This allows us to do more optimized painting in some cases.
   bool is_always_opaque_;
 
+  // Set to the scale between what the plugin considers to be one pixel and one
+  // DIP
+  float scale_;
+
   base::WeakPtrFactory<PPB_Graphics2D_Impl> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(PPB_Graphics2D_Impl);
 };
 
 }  // namespace ppapi
 }  // namespace webkit
 
 #endif  // WEBKIT_PLUGINS_PPAPI_PPB_GRAPHICS_2D_IMPL_H_