JPEG YUV Decoding

src/images/SkDecodingImageGenerator.cpp

Index: src/images/SkDecodingImageGenerator.cpp
diff --git a/src/images/SkDecodingImageGenerator.cpp b/src/images/SkDecodingImageGenerator.cpp
index 3b5cb784edd4254f2c7ce4b51ad7d4c2dfe02b4a..a90c1cf01f8af0b2c169c70dd67045305324037a 100644
--- a/src/images/SkDecodingImageGenerator.cpp
+++ b/src/images/SkDecodingImageGenerator.cpp
@@ -45,6 +45,8 @@ protected:
     virtual bool onGetPixels(const SkImageInfo& info,
                              void* pixels, size_t rowBytes,
                              SkPMColor ctable[], int* ctableCount) SK_OVERRIDE;
+    virtual bool onGetYUV8Planes(SkISize sizes[3], void* planes[3], size_t rowBytes[3],
+                                 SkYUVColorSpace* colorSpace) SK_OVERRIDE;
 
 private:
     typedef SkImageGenerator INHERITED;
@@ -204,6 +206,20 @@ bool DecodingImageGenerator::onGetPixels(const SkImageInfo& info,
     return true;
 }
 
+bool DecodingImageGenerator::onGetYUV8Planes(SkISize sizes[3], void* planes[3],
+                                             size_t rowBytes[3], SkYUVColorSpace* colorSpace) {
+    if (!fStream->rewind()) {
+        return false;
+    }
+
+    SkAutoTDelete<SkImageDecoder> decoder(SkImageDecoder::Factory(fStream));
+    if (NULL == decoder.get()) {
+        return false;
+    }
+
+    return decoder->decodeYUV8Planes(fStream, sizes, planes, rowBytes, colorSpace);
+}
+
 // A contructor-type function that returns NULL on failure.  This
 // prevents the returned SkImageGenerator from ever being in a bad
 // state.  Called by both Create() functions