new API for retrieving YUV data

src/ports/SkImageGenerator_skia.cpp

 /*
  * Copyright 2015 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkData.h"
 #include "SkImageDecoder.h"
 #include "SkImageGenerator.h"
@@ skipping 68 matching lines @@
             if (NULL == ctable) {
                 return false;
             }
             const int count = ctable->count();
             memcpy(ctableEntries, ctable->readColors(), count * sizeof(SkPMColor));
             *ctableCount = count;
         }
         return true;
     }
 
-    bool onGetYUV8Planes(SkISize sizes[3], void* planes[3], size_t rowBytes[3],
-                         SkYUVColorSpace* colorSpace) SK_OVERRIDE {
+    bool onQueryYUV8(SkISize logical[3], SkISize optimal[3]) SK_OVERRIDE {
         SkMemoryStream stream(fData->data(), fData->size(), false);
-        return fDecoder->decodeYUV8Planes(&stream, sizes, planes, rowBytes, colorSpace);
+        return false;//fDecoder->decodeYUV8Planes(&stream, sizes, planes, rowBytes, colorSpace);
     }
-    
+
+    bool onGetYUV8(const SkISize sizes[3], void* planes[3], SkYUVColorSpace* cspace) SK_OVERRIDE {
+        SkMemoryStream stream(fData->data(), fData->size(), false);
+        return false;//fDecoder->decodeYUV8Planes(&stream, sizes, planes, rowBytes, colorSpace);
+    }
 };
 
 SkImageGenerator* SkImageGenerator::NewFromData(SkData* data) {
     if (NULL == data) {
         return NULL;
     }
 
     SkMemoryStream stream(data->data(), data->size(), false);
     SkImageDecoder* decoder = SkImageDecoder::Factory(&stream);
     if (NULL == decoder) {
         return NULL;
     }
 
     SkBitmap bm;
     stream.rewind();
     if (!decoder->decode(&stream, &bm, kUnknown_SkColorType, SkImageDecoder::kDecodeBounds_Mode)) {
         SkDELETE(decoder);
         return NULL;
     }
 
     return SkNEW_ARGS(SkImageDecoderGenerator, (bm.info(), decoder, data));
 }