1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/image/decoders/nsGIFDecoder2.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,72 @@
1.4 +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
1.5 + *
1.6 + * This Source Code Form is subject to the terms of the Mozilla Public
1.7 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.8 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.9 +
1.10 +#ifndef _nsGIFDecoder2_h
1.11 +#define _nsGIFDecoder2_h
1.12 +
1.13 +#include "nsCOMPtr.h"
1.14 +#include "Decoder.h"
1.15 +
1.16 +#include "GIF2.h"
1.17 +
1.18 +namespace mozilla {
1.19 +namespace image {
1.20 +class RasterImage;
1.21 +
1.22 +//////////////////////////////////////////////////////////////////////
1.23 +// nsGIFDecoder2 Definition
1.24 +
1.25 +class nsGIFDecoder2 : public Decoder
1.26 +{
1.27 +public:
1.28 +
1.29 + nsGIFDecoder2(RasterImage &aImage);
1.30 + ~nsGIFDecoder2();
1.31 +
1.32 + virtual void WriteInternal(const char* aBuffer, uint32_t aCount, DecodeStrategy aStrategy);
1.33 + virtual void FinishInternal();
1.34 + virtual Telemetry::ID SpeedHistogram();
1.35 +
1.36 +private:
1.37 + /* These functions will be called when the decoder has a decoded row,
1.38 + * frame size information, etc. */
1.39 +
1.40 + void BeginGIF();
1.41 + void BeginImageFrame(uint16_t aDepth);
1.42 + void EndImageFrame();
1.43 + void FlushImageData();
1.44 + void FlushImageData(uint32_t fromRow, uint32_t rows);
1.45 +
1.46 + nsresult GifWrite(const uint8_t * buf, uint32_t numbytes);
1.47 + uint32_t OutputRow();
1.48 + bool DoLzw(const uint8_t *q);
1.49 + bool SetHold(const uint8_t* buf, uint32_t count,
1.50 + const uint8_t* buf2 = nullptr, uint32_t count2 = 0);
1.51 +
1.52 + inline int ClearCode() const { return 1 << mGIFStruct.datasize; }
1.53 +
1.54 + int32_t mCurrentRow;
1.55 + int32_t mLastFlushedRow;
1.56 +
1.57 + uint32_t mOldColor; // The old value of the transparent pixel
1.58 +
1.59 + // The frame number of the currently-decoding frame when we're in the middle
1.60 + // of decoding it, and -1 otherwise.
1.61 + int32_t mCurrentFrame;
1.62 +
1.63 + uint8_t mCurrentPass;
1.64 + uint8_t mLastFlushedPass;
1.65 + uint8_t mColorMask; // Apply this to the pixel to keep within colormap
1.66 + bool mGIFOpen;
1.67 + bool mSawTransparency;
1.68 +
1.69 + gif_struct mGIFStruct;
1.70 +};
1.71 +
1.72 +} // namespace image
1.73 +} // namespace mozilla
1.74 +
1.75 +#endif
