Scanline decoding for bmp

include/codec/SkScanlineDecoder.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 SkScanlineDecoder_DEFINED
 #define SkScanlineDecoder_DEFINED
 
@@ skipping 121 matching lines @@
      *  FIXME: see skbug.com/3582.
      */
     bool reallyHasAlpha() const {
         return this->onReallyHasAlpha();
     }
 
 protected:
     SkScanlineDecoder(const SkImageInfo& srcInfo)
         : fSrcInfo(srcInfo)
         , fDstInfo()
+        , fOptions()
         , fCurrScanline(0) {}
 
     virtual bool onReallyHasAlpha() const { return false; }
 
     const SkImageInfo& dstInfo() const { return fDstInfo; }
 
+    const SkCodec::Options& options() const { return fOptions; }
+
 private:
     const SkImageInfo   fSrcInfo;
     SkImageInfo         fDstInfo;
+    SkCodec::Options    fOptions;
     int                 fCurrScanline;
 
     virtual SkCodec::Result onStart(const SkImageInfo& dstInfo,
                                     const SkCodec::Options& options,
                                     SkPMColor ctable[], int* ctableCount) = 0;
 
     // Naive default version just calls onGetScanlines on temp memory.
     virtual SkCodec::Result onSkipScanlines(int countLines) {
         SkAutoMalloc storage(fDstInfo.minRowBytes());
         // Note that we pass 0 to rowBytes so we continue to use the same memory.
         // Also note that while getScanlines checks that rowBytes is big enough,
         // onGetScanlines bypasses that check.
         // Calling the virtual method also means we do not double count
         // countLines.
         return this->onGetScanlines(storage.get(), countLines, 0);
     }
 
     virtual SkCodec::Result onGetScanlines(void* dst, int countLines,
                                                     size_t rowBytes) = 0;
 
 };
 #endif // SkScanlineDecoder_DEFINED