The Tor Browser / file comparison
comparison: image/decoders/nsJPEGDecoder.h
image/decoders/nsJPEGDecoder.h
- changeset 0
- 6474c204b198
equal
deleted
inserted
replaced
| -1:000000000000 | 0:38493961b44d |
|---|---|
| 1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- | |
| 2 * | |
| 3 * This Source Code Form is subject to the terms of the Mozilla Public | |
| 4 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 6 | |
| 7 #ifndef nsJPEGDecoder_h__ | |
| 8 #define nsJPEGDecoder_h__ | |
| 9 | |
| 10 #include "RasterImage.h" | |
| 11 /* On Windows systems, RasterImage.h brings in 'windows.h', which defines INT32. | |
| 12 * But the jpeg decoder has its own definition of INT32. To avoid build issues, | |
| 13 * we need to undefine the version from 'windows.h'. */ | |
| 14 #undef INT32 | |
| 15 | |
| 16 #include "Decoder.h" | |
| 17 | |
| 18 #include "nsAutoPtr.h" | |
| 19 | |
| 20 #include "nsIInputStream.h" | |
| 21 #include "nsIPipe.h" | |
| 22 #include "qcms.h" | |
| 23 | |
| 24 extern "C" { | |
| 25 #include "jpeglib.h" | |
| 26 } | |
| 27 | |
| 28 #include <setjmp.h> | |
| 29 | |
| 30 namespace mozilla { | |
| 31 namespace image { | |
| 32 | |
| 33 typedef struct { | |
| 34 struct jpeg_error_mgr pub; /* "public" fields for IJG library*/ | |
| 35 jmp_buf setjmp_buffer; /* For handling catastropic errors */ | |
| 36 } decoder_error_mgr; | |
| 37 | |
| 38 typedef enum { | |
| 39 JPEG_HEADER, /* Reading JFIF headers */ | |
| 40 JPEG_START_DECOMPRESS, | |
| 41 JPEG_DECOMPRESS_PROGRESSIVE, /* Output progressive pixels */ | |
| 42 JPEG_DECOMPRESS_SEQUENTIAL, /* Output sequential pixels */ | |
| 43 JPEG_DONE, | |
| 44 JPEG_SINK_NON_JPEG_TRAILER, /* Some image files have a */ | |
| 45 /* non-JPEG trailer */ | |
| 46 JPEG_ERROR | |
| 47 } jstate; | |
| 48 | |
| 49 class RasterImage; | |
| 50 class Orientation; | |
| 51 | |
| 52 class nsJPEGDecoder : public Decoder | |
| 53 { | |
| 54 public: | |
| 55 nsJPEGDecoder(RasterImage &aImage, Decoder::DecodeStyle aDecodeStyle); | |
| 56 virtual ~nsJPEGDecoder(); | |
| 57 | |
| 58 virtual void InitInternal(); | |
| 59 virtual void WriteInternal(const char* aBuffer, uint32_t aCount, DecodeStrategy aStrategy); | |
| 60 virtual void FinishInternal(); | |
| 61 | |
| 62 virtual Telemetry::ID SpeedHistogram(); | |
| 63 void NotifyDone(); | |
| 64 | |
| 65 protected: | |
| 66 Orientation ReadOrientationFromEXIF(); | |
| 67 void OutputScanlines(bool* suspend); | |
| 68 | |
| 69 public: | |
| 70 struct jpeg_decompress_struct mInfo; | |
| 71 struct jpeg_source_mgr mSourceMgr; | |
| 72 decoder_error_mgr mErr; | |
| 73 jstate mState; | |
| 74 | |
| 75 uint32_t mBytesToSkip; | |
| 76 | |
| 77 const JOCTET *mSegment; // The current segment we are decoding from | |
| 78 uint32_t mSegmentLen; // amount of data in mSegment | |
| 79 | |
| 80 JOCTET *mBackBuffer; | |
| 81 uint32_t mBackBufferLen; // Offset of end of active backtrack data | |
| 82 uint32_t mBackBufferSize; // size in bytes what mBackBuffer was created with | |
| 83 uint32_t mBackBufferUnreadLen; // amount of data currently in mBackBuffer | |
| 84 | |
| 85 JOCTET *mProfile; | |
| 86 uint32_t mProfileLength; | |
| 87 | |
| 88 qcms_profile *mInProfile; | |
| 89 qcms_transform *mTransform; | |
| 90 | |
| 91 bool mReading; | |
| 92 | |
| 93 const Decoder::DecodeStyle mDecodeStyle; | |
| 94 | |
| 95 uint32_t mCMSMode; | |
| 96 }; | |
| 97 | |
| 98 } // namespace image | |
| 99 } // namespace mozilla | |
| 100 | |
| 101 #endif // nsJPEGDecoder_h__ |
