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); 38 39 // Unowned. 40 SkStream* fStream; 41 // Unowned pointer to the decoder, used to check if the decoding process 42 // has been cancelled. 43 SkImageDecoder* fDecoder; 44 enum { 45 kBufferSize = 1024 46 }; 47 char fBuffer[kBufferSize]; 48 }; 49 50 ///////////////////////////////////////////////////////////////////////////// 51 /* Our destination struct for directing decompressed pixels to our stream 52 * object. 53 */ 54 struct skjpeg_destination_mgr : jpeg_destination_mgr { 55 skjpeg_destination_mgr(SkWStream* stream); 56 57 SkWStream* fStream; 58 59 enum { 60 kBufferSize = 1024 61 }; 62 uint8_t fBuffer[kBufferSize]; 63 }; 64 65 #endif 66
