Report repetition count in SkCodec

include/codec/SkCodec.h

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef SkCodec_DEFINED
 #define SkCodec_DEFINED
 
@@ skipping 589 matching lines @@
 
         /**
          *  Number of milliseconds to show this frame.
          */
         size_t fDuration;
     };
 
     /**
      *  Return info about the frames in the image.
      *
-     *  May require reading through the stream to determine the number of
-     *  frames.
+     *  May require reading through the stream to determine info about the
+     *  frames (including the count).
      *
      *  As such, future decoding calls may require a rewind.
      *
      *  For single-frame images, this will return an empty vector.
      */
     std::vector<FrameInfo> getFrameInfo() {
         return this->onGetFrameInfo();
     }
 
+    static constexpr int kRepetitionCountInfinite = -1;
+
+    /**
+     *  Return the number of times to repeat, if this image is animated.
+     *
+     *  May require reading the stream to find the repetition count.
+     *
+     *  As such, future decoding calls may require a rewind.
+     *
+     *  For single-frame images, this will return 0.
+     */
+    int getRepetitionCount() {
+        return this->onGetRepetitionCount();
+    }
+
 protected:
     /**
      *  Takes ownership of SkStream*
      */
     SkCodec(int width,
             int height,
             const SkEncodedInfo&,
             SkStream*,
             sk_sp<SkColorSpace>,
             Origin = kTopLeft_Origin);
@@ skipping 128 matching lines @@
     virtual int onOutputScanline(int inputScanline) const;
 
     bool initializeColorXform(const SkImageInfo& dstInfo);
     SkColorSpaceXform* colorXform() const { return fColorXform.get(); }
 
     virtual std::vector<FrameInfo> onGetFrameInfo() {
         // empty vector - this is not animated.
         return {};
     }
 
+    virtual int onGetRepetitionCount() {
+        return 0;
+    }
+
     /**
      *  Used for testing with qcms.
      *  FIXME: Remove this when we are done comparing with qcms.
      */
     virtual sk_sp<SkData> getICCData() const { return nullptr; }
 
 private:
     const SkEncodedInfo                fEncodedInfo;
     const SkImageInfo                  fSrcInfo;
     std::unique_ptr<SkStream>          fStream;
@@ skipping 72 matching lines @@
     // For testing with qcms
     // FIXME: Remove these when we are done comparing with qcms.
     friend class DM::ColorCodecSrc;
     friend class ColorCodecBench;
 
     friend class DM::CodecSrc;  // for fillIncompleteImage
     friend class SkSampledCodec;
     friend class SkIcoCodec;
 };
 #endif // SkCodec_DEFINED