Skia side RGB to YUV gpu conversion

include/core/SkPixelRef.h

Index: include/core/SkPixelRef.h
diff --git a/include/core/SkPixelRef.h b/include/core/SkPixelRef.h
index 263145ba3d90baefabd5552cefed18892fed1c02..ccdbceaec96e0930ae7c1adc15ae69ba1fef4327 100644
--- a/include/core/SkPixelRef.h
+++ b/include/core/SkPixelRef.h
@@ -14,6 +14,7 @@
 #include "SkString.h"
 #include "SkFlattenable.h"
 #include "SkImageInfo.h"
+#include "SkSize.h"
 #include "SkTDArray.h"
 
 //#define xed
@@ -227,6 +228,16 @@ public:
      */
     virtual GrTexture* getTexture() { return NULL; }
 
+    /**
+     *  If the 2nd argument is NULL, this should output the sizes and return true
+     *  if it can efficiently return YUV planar data. If it cannot, it should return false.
+     *
+     *  If the 2nd argument is not NULL, then it should copy the associated Y,U,V data
+     *  into those planes of memory supplied by the caller. It should validate that the sizes
+     *  match what it expected. If the sizes do not match, it should return false.
+     */

[robertphillips, 2014/07/10 12:47:20]

SkISize sizes[3], void* planes[3], int rowBytes[3] ?

[sugoi1, 2014/07/10 16:10:52]

Done.

+    virtual bool getYUV8Planes(SkISize*, void*) { return false; }
+
     bool readPixels(SkBitmap* dst, const SkIRect* subset = NULL);
 
     /**