Calculate rough approximations for nvpr path sizes

src/gpu/gl/GrGLPath.h

 
 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef GrGLPath_DEFINED
 #define GrGLPath_DEFINED
 
 #include "../GrPath.h"
 #include "gl/GrGLFunctions.h"
 
 class GrGpuGL;
 
 /**
  * Currently this represents a path built using GL_NV_path_rendering. If we
  * support other GL path extensions then this would have to have a type enum
  * and/or be subclassed.
  */
 
 class GrGLPath : public GrPath {
 public:
-    static void InitPathObject(GrGpuGL*,
-                               GrGLuint pathID,
-                               const SkPath&,
-                               const SkStrokeRec&);
+    /**
+     * Initialize a GL path object with a given path and stroke.
+     *
+     * @return the approximate GPU memory size of the path object in bytes.
+     */
+    static size_t InitPathObject(GrGpuGL*,
+                                 GrGLuint pathID,
+                                 const SkPath&,
+                                 const SkStrokeRec&);
 
     GrGLPath(GrGpuGL* gpu, const SkPath& path, const SkStrokeRec& stroke);
     virtual ~GrGLPath();
     GrGLuint pathID() const { return fPathID; }
-    // TODO: Figure out how to get an approximate size of the path in Gpu
-    // memory.
-    virtual size_t gpuMemorySize() const SK_OVERRIDE { return 100; }
+    virtual size_t gpuMemorySize() const SK_OVERRIDE { return fGpuMemorySize; }
 
 protected:
     virtual void onRelease() SK_OVERRIDE;
     virtual void onAbandon() SK_OVERRIDE;
 
 private:
     GrGLuint fPathID;
+    size_t fGpuMemorySize;
 
     typedef GrPath INHERITED;
 };
 
 #endif