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| 1 | |
| 2 /* | |
| 3 * Copyright 2010 The Android Open Source Project | |
| 4 * | |
| 5 * Use of this source code is governed by a BSD-style license that can be | |
| 6 * found in the LICENSE file. | |
| 7 */ | |
| 8 | |
| 9 | |
| 10 #ifndef SkJpegUtility_DEFINED | |
| 11 #define SkJpegUtility_DEFINED | |
| 12 | |
| 13 #include "SkImageDecoder.h" | |
| 14 #include "SkStream.h" | |
| 15 | |
| 16 extern "C" { | |
| 17 #include "jpeglib.h" | |
| 18 #include "jerror.h" | |
| 19 } | |
| 20 | |
| 21 #include <setjmp.h> | |
| 22 | |
| 23 /* Our error-handling struct. | |
| 24 * | |
| 25 */ | |
| 26 struct skjpeg_error_mgr : jpeg_error_mgr { | |
| 27 jmp_buf fJmpBuf; | |
| 28 }; | |
| 29 | |
| 30 | |
| 31 void skjpeg_error_exit(j_common_ptr cinfo); | |
| 32 | |
| 33 /////////////////////////////////////////////////////////////////////////// | |
| 34 /* Our source struct for directing jpeg to our stream object. | |
| 35 */ | |
| 36 struct skjpeg_source_mgr : jpeg_source_mgr { | |
| 37 skjpeg_source_mgr(SkStream* stream, SkImageDecoder* decoder, bool ownStream)
; | |
| 38 ~skjpeg_source_mgr(); | |
| 39 | |
| 40 SkStream* fStream; | |
| 41 void* fMemoryBase; | |
| 42 size_t fMemoryBaseSize; | |
| 43 bool fUnrefStream; | |
| 44 SkImageDecoder* fDecoder; | |
| 45 enum { | |
| 46 kBufferSize = 1024 | |
| 47 }; | |
| 48 char fBuffer[kBufferSize]; | |
| 49 }; | |
| 50 | |
| 51 ///////////////////////////////////////////////////////////////////////////// | |
| 52 /* Our destination struct for directing decompressed pixels to our stream | |
| 53 * object. | |
| 54 */ | |
| 55 struct skjpeg_destination_mgr : jpeg_destination_mgr { | |
| 56 skjpeg_destination_mgr(SkWStream* stream); | |
| 57 | |
| 58 SkWStream* fStream; | |
| 59 | |
| 60 enum { | |
| 61 kBufferSize = 1024 | |
| 62 }; | |
| 63 uint8_t fBuffer[kBufferSize]; | |
| 64 }; | |
| 65 | |
| 66 #endif | |
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Chromium Code Reviews
Issue 12438025:
Upstream changes from Android for decoding jpeg images. (Closed)
Base URL: https://skia.googlecode.com/svn/trunk