Add support for the Rec601 YUV color space to GrYUVtoRGBEffect.

include/core/SkPixelRef.h

Index: include/core/SkPixelRef.h
diff --git a/include/core/SkPixelRef.h b/include/core/SkPixelRef.h
index afab7fad9e04e746fa289b6d42e58b73fb277900..8801badd33c238f90172f58f47c6712ec56aeb65 100644
--- a/include/core/SkPixelRef.h
+++ b/include/core/SkPixelRef.h
@@ -220,6 +220,14 @@ public:
      */
     virtual GrTexture* getTexture() { return NULL; }
 
+    enum YUVColorSpace {

[rileya (GONE FROM CHROMIUM), 2014/09/11 06:59:30]

This would probably be better off somewhere else, any thoughts on where?

+        /** Standard JPEG color space. */
+        kJPEG_YUVColorSpace,
+        /** SDTV standard Rec. 601 color space. Uses "studio swing" [16, 235] color
+           range. See http://en.wikipedia.org/wiki/Rec._601 for details. */
+        kRec601_YUVColorSpace
+    };
+
     /**
      *  If any planes or rowBytes 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.
@@ -227,9 +235,13 @@ public:
      *  If all planes and rowBytes are 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.
+     *
+     *  If colorSpace is not NULL, the YUV color space of the data should be stored in the address
+     *  it points at.
      */
-    bool getYUV8Planes(SkISize sizes[3], void* planes[3], size_t rowBytes[3]) {
-        return this->onGetYUV8Planes(sizes, planes, rowBytes);
+    bool getYUV8Planes(SkISize sizes[3], void* planes[3], size_t rowBytes[3],
+                       YUVColorSpace* colorSpace) {
+        return this->onGetYUV8Planes(sizes, planes, rowBytes, colorSpace);
     }
 
     bool readPixels(SkBitmap* dst, const SkIRect* subset = NULL);
@@ -319,7 +331,8 @@ protected:
     virtual SkData* onRefEncodedData();
 
     // default impl returns false.
-    virtual bool onGetYUV8Planes(SkISize sizes[3], void* planes[3], size_t rowBytes[3]);
+    virtual bool onGetYUV8Planes(SkISize sizes[3], void* planes[3], size_t rowBytes[3],
+                                 YUVColorSpace* colorSpace);
 
     /**
      *  Returns the size (in bytes) of the internally allocated memory.