Support for non-DOM canvases/contexts (backed by bitaps).

runtime/embedders/openglui/common/canvas_context.h

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #ifndef EMBEDDERS_OPENGLUI_COMMON_CANVAS_CONTEXT_H_
 #define EMBEDDERS_OPENGLUI_COMMON_CANVAS_CONTEXT_H_
 
 #include "embedders/openglui/common/canvas_state.h"
 #include "embedders/openglui/common/graphics_handler.h"
 #include "embedders/openglui/common/log.h"
@@ skipping 25 matching lines @@
 
   static inline float Radians2Degrees(float angle) {
     return 180.0 * angle / M_PI;
   }
 
   inline void NotImplemented(const char* method) {
     LOGE("Method CanvasContext::%s is not yet implemented", method);
   }
 
  public:
-  CanvasContext(int16_t width, int16_t height);
+  CanvasContext(int handle, int16_t width, int16_t height);
   virtual ~CanvasContext();
 
   inline void setGlobalAlpha(float alpha) {
     state_->setGlobalAlpha(alpha);
   }
 
   inline void setFillColor(const char* color) {
     state_->setFillColor(color);
   }
 
@@ skipping 228 matching lines @@
   }
 
   inline void ResetClip() {
     // TODO(gram): Check this. Is it affected by the transform?
     canvas_->clipRect(SkRect::MakeLTRB(0, 0, width_, height_),
                       SkRegion::kReplace_Op);
   }
 
   virtual void Flush() {
     canvas_->flush();
-    graphics->Flush();
   }
+};
 
-  void Create();
-};
+CanvasContext* Context2D(int handle);
 
 #endif  // EMBEDDERS_OPENGLUI_COMMON_CANVAS_CONTEXT_H_