image/decoders/nsGIFDecoder2.h@6474c204b198 (annotated)
image/decoders/nsGIFDecoder2.h
Wed, 31 Dec 2014 06:09:35 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Wed, 31 Dec 2014 06:09:35 +0100
- changeset 0
- 6474c204b198
- permissions
- -rw-r--r--
Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.
| michael@0 | 1 | /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- |
| michael@0 | 2 | * |
| michael@0 | 3 | * This Source Code Form is subject to the terms of the Mozilla Public |
| michael@0 | 4 | * License, v. 2.0. If a copy of the MPL was not distributed with this |
| michael@0 | 5 | * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ |
| michael@0 | 6 | |
| michael@0 | 7 | #ifndef _nsGIFDecoder2_h |
| michael@0 | 8 | #define _nsGIFDecoder2_h |
| michael@0 | 9 | |
| michael@0 | 10 | #include "nsCOMPtr.h" |
| michael@0 | 11 | #include "Decoder.h" |
| michael@0 | 12 | |
| michael@0 | 13 | #include "GIF2.h" |
| michael@0 | 14 | |
| michael@0 | 15 | namespace mozilla { |
| michael@0 | 16 | namespace image { |
| michael@0 | 17 | class RasterImage; |
| michael@0 | 18 | |
| michael@0 | 19 | ////////////////////////////////////////////////////////////////////// |
| michael@0 | 20 | // nsGIFDecoder2 Definition |
| michael@0 | 21 | |
| michael@0 | 22 | class nsGIFDecoder2 : public Decoder |
| michael@0 | 23 | { |
| michael@0 | 24 | public: |
| michael@0 | 25 | |
| michael@0 | 26 | nsGIFDecoder2(RasterImage &aImage); |
| michael@0 | 27 | ~nsGIFDecoder2(); |
| michael@0 | 28 | |
| michael@0 | 29 | virtual void WriteInternal(const char* aBuffer, uint32_t aCount, DecodeStrategy aStrategy); |
| michael@0 | 30 | virtual void FinishInternal(); |
| michael@0 | 31 | virtual Telemetry::ID SpeedHistogram(); |
| michael@0 | 32 | |
| michael@0 | 33 | private: |
| michael@0 | 34 | /* These functions will be called when the decoder has a decoded row, |
| michael@0 | 35 | * frame size information, etc. */ |
| michael@0 | 36 | |
| michael@0 | 37 | void BeginGIF(); |
| michael@0 | 38 | void BeginImageFrame(uint16_t aDepth); |
| michael@0 | 39 | void EndImageFrame(); |
| michael@0 | 40 | void FlushImageData(); |
| michael@0 | 41 | void FlushImageData(uint32_t fromRow, uint32_t rows); |
| michael@0 | 42 | |
| michael@0 | 43 | nsresult GifWrite(const uint8_t * buf, uint32_t numbytes); |
| michael@0 | 44 | uint32_t OutputRow(); |
| michael@0 | 45 | bool DoLzw(const uint8_t *q); |
| michael@0 | 46 | bool SetHold(const uint8_t* buf, uint32_t count, |
| michael@0 | 47 | const uint8_t* buf2 = nullptr, uint32_t count2 = 0); |
| michael@0 | 48 | |
| michael@0 | 49 | inline int ClearCode() const { return 1 << mGIFStruct.datasize; } |
| michael@0 | 50 | |
| michael@0 | 51 | int32_t mCurrentRow; |
| michael@0 | 52 | int32_t mLastFlushedRow; |
| michael@0 | 53 | |
| michael@0 | 54 | uint32_t mOldColor; // The old value of the transparent pixel |
| michael@0 | 55 | |
| michael@0 | 56 | // The frame number of the currently-decoding frame when we're in the middle |
| michael@0 | 57 | // of decoding it, and -1 otherwise. |
| michael@0 | 58 | int32_t mCurrentFrame; |
| michael@0 | 59 | |
| michael@0 | 60 | uint8_t mCurrentPass; |
| michael@0 | 61 | uint8_t mLastFlushedPass; |
| michael@0 | 62 | uint8_t mColorMask; // Apply this to the pixel to keep within colormap |
| michael@0 | 63 | bool mGIFOpen; |
| michael@0 | 64 | bool mSawTransparency; |
| michael@0 | 65 | |
| michael@0 | 66 | gif_struct mGIFStruct; |
| michael@0 | 67 | }; |
| michael@0 | 68 | |
| michael@0 | 69 | } // namespace image |
| michael@0 | 70 | } // namespace mozilla |
| michael@0 | 71 | |
| michael@0 | 72 | #endif |
