Add whitelist parameter to refEncodedData

src/codec/SkCodecImageGenerator.cpp

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkCodecImageGenerator.h"
 
 SkImageGenerator* SkCodecImageGenerator::NewFromEncodedCodec(SkData* data) {
@@ skipping 21 matching lines @@
     return SkImageInfo::Make(info.width(), info.height(), info.colorType(), alphaType, profileType);
 }
 
 SkCodecImageGenerator::SkCodecImageGenerator(SkCodec* codec, SkData* data)
     : INHERITED(fix_info(*codec))
     , fCodec(codec)
     , fData(SkRef(data))
 {}
 
 SkData* SkCodecImageGenerator::onRefEncodedData(SK_REFENCODEDDATA_CTXPARAM) {
+#ifndef SK_SUPPORT_LEGACY_REFENCODEDDATA_NOCTX
+    if (whitelist && !whitelist->includes(fCodec->getEncodedFormat())) {
+        return nullptr;
+    }
+#endif
     return SkRef(fData.get());
 }
 
 bool SkCodecImageGenerator::onGetPixels(const SkImageInfo& info, void* pixels, size_t rowBytes,
         SkPMColor ctable[], int* ctableCount) {
 
     SkCodec::Result result = fCodec->getPixels(info, pixels, rowBytes, nullptr, ctable,
             ctableCount);
     switch (result) {
         case SkCodec::kSuccess:
@@ skipping 13 matching lines @@
     SkCodec::Result result = fCodec->getYUV8Planes(sizeInfo, planes);
 
     switch (result) {
         case SkCodec::kSuccess:
         case SkCodec::kIncompleteInput:
             return true;
         default:
             return false;
     }
 }