Report repetition count in SkCodec

src/codec/SkGifCodec.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.
  */
 
 /*
  * Copyright (C) 2006 Apple Computer, Inc.  All rights reserved.
  *
@@ skipping 109 matching lines @@
     , fCurrColorTableIsReal(false)
     , fFilledBackground(false)
     , fFirstCallToIncrementalDecode(false)
     , fDst(nullptr)
     , fDstRowBytes(0)
     , fRowsDecoded(0)
 {
     reader->setClient(this);
 }
 
-std::vector<SkCodec::FrameInfo> SkGifCodec::onGetFrameInfo() {
+bool SkGifCodec::onGetFrameInfo(std::vector<FrameInfo>* frameInfos, int* repetitionCount) {
     fReader->parse(SkGifImageReader::SkGIFFrameCountQuery);
     const size_t size = fReader->imagesCount();
-    std::vector<FrameInfo> result(size);
-    for (size_t i = 0; i < size; i++) {
-        const SkGIFFrameContext* frameContext = fReader->frameContext(i);
-        result[i].fDuration = frameContext->delayTime();
-        result[i].fRequiredFrame = frameContext->getRequiredFrame();
+    if (frameInfos) {
+        frameInfos->resize(size);
+        for (size_t i = 0; i < size; i++) {
+            const SkGIFFrameContext* frameContext = fReader->frameContext(i);
+            auto& info = frameInfos->operator[](i);
+            info.fDuration = frameContext->delayTime();
+            info.fRequiredFrame = frameContext->getRequiredFrame();
+        }
     }
-    return result;
+    if (repetitionCount) {
+        *repetitionCount = fReader->loopCount();
+    }
+    return true;
 }
 
 void SkGifCodec::initializeColorTable(const SkImageInfo& dstInfo, size_t frameIndex,
         SkPMColor* inputColorPtr, int* inputColorCount) {
     fCurrColorTable = fReader->getColorTable(dstInfo.colorType(), frameIndex);
     fCurrColorTableIsReal = fCurrColorTable;
     if (!fCurrColorTable) {
         // This is possible for an empty frame. Create a dummy with all transparent.
         SkPMColor colors[SK_MAX_COLORS];
         sk_memset32(colors, SK_ColorTRANSPARENT, SK_MAX_COLORS);
@@ skipping 406 matching lines @@
         void* copiedLine = SkTAddOffset<void>(dstLine, fSwizzler->swizzleOffsetBytes());
         void* dst = copiedLine;
         for (unsigned i = 1; i < repeatCount; i++) {
             dst = SkTAddOffset<void>(dst, fDstRowBytes);
             memcpy(dst, copiedLine, bytesToCopy);
         }
     }
 
     return true;
 }