michael@0: /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
michael@0:  *
michael@0:  * This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: #ifndef _nsGIFDecoder2_h
michael@0: #define _nsGIFDecoder2_h
michael@0: 
michael@0: #include "nsCOMPtr.h"
michael@0: #include "Decoder.h"
michael@0: 
michael@0: #include "GIF2.h"
michael@0: 
michael@0: namespace mozilla {
michael@0: namespace image {
michael@0: class RasterImage;
michael@0: 
michael@0: //////////////////////////////////////////////////////////////////////
michael@0: // nsGIFDecoder2 Definition
michael@0: 
michael@0: class nsGIFDecoder2 : public Decoder
michael@0: {
michael@0: public:
michael@0: 
michael@0:   nsGIFDecoder2(RasterImage &aImage);
michael@0:   ~nsGIFDecoder2();
michael@0: 
michael@0:   virtual void WriteInternal(const char* aBuffer, uint32_t aCount, DecodeStrategy aStrategy);
michael@0:   virtual void FinishInternal();
michael@0:   virtual Telemetry::ID SpeedHistogram();
michael@0: 
michael@0: private:
michael@0:   /* These functions will be called when the decoder has a decoded row,
michael@0:    * frame size information, etc. */
michael@0: 
michael@0:   void      BeginGIF();
michael@0:   void      BeginImageFrame(uint16_t aDepth);
michael@0:   void      EndImageFrame();
michael@0:   void      FlushImageData();
michael@0:   void      FlushImageData(uint32_t fromRow, uint32_t rows);
michael@0: 
michael@0:   nsresult  GifWrite(const uint8_t * buf, uint32_t numbytes);
michael@0:   uint32_t  OutputRow();
michael@0:   bool      DoLzw(const uint8_t *q);
michael@0:   bool      SetHold(const uint8_t* buf, uint32_t count,
michael@0:                     const uint8_t* buf2 = nullptr, uint32_t count2 = 0);
michael@0: 
michael@0:   inline int ClearCode() const { return 1 << mGIFStruct.datasize; }
michael@0: 
michael@0:   int32_t mCurrentRow;
michael@0:   int32_t mLastFlushedRow;
michael@0: 
michael@0:   uint32_t mOldColor;        // The old value of the transparent pixel
michael@0: 
michael@0:   // The frame number of the currently-decoding frame when we're in the middle
michael@0:   // of decoding it, and -1 otherwise.
michael@0:   int32_t mCurrentFrame;
michael@0: 
michael@0:   uint8_t mCurrentPass;
michael@0:   uint8_t mLastFlushedPass;
michael@0:   uint8_t mColorMask;        // Apply this to the pixel to keep within colormap
michael@0:   bool mGIFOpen;
michael@0:   bool mSawTransparency;
michael@0: 
michael@0:   gif_struct mGIFStruct;
michael@0: };
michael@0: 
michael@0: } // namespace image
michael@0: } // namespace mozilla
michael@0: 
michael@0: #endif