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 67
