1 /* 2 * Copyright (C) 2010 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef SkJpegUtility_DEFINED 18 #define SkJpegUtility_DEFINED 19 20 #include "SkImageDecoder.h" 21 #include "SkStream.h" 22 23 extern "C" { 24 #include "jpeglib.h" 25 #include "jerror.h" 26 } 27 28 #include <setjmp.h> 29 30 /* Our error-handling struct. 31 * 32 */ 33 struct skjpeg_error_mgr : jpeg_error_mgr { 34 jmp_buf fJmpBuf; 35 }; 36 37 38 void skjpeg_error_exit(j_common_ptr cinfo); 39 40 /////////////////////////////////////////////////////////////////////////// 41 /* Our source struct for directing jpeg to our stream object. 42 */ 43 struct skjpeg_source_mgr : jpeg_source_mgr { 44 skjpeg_source_mgr(SkStream* stream, SkImageDecoder* decoder, bool ownStream); 45 ~skjpeg_source_mgr(); 46 47 SkStream* fStream; 48 void* fMemoryBase; 49 size_t fMemoryBaseSize; 50 bool fUnrefStream; 51 SkImageDecoder* fDecoder; 52 enum { 53 kBufferSize = 1024 54 }; 55 char fBuffer[kBufferSize]; 56 }; 57 58 ///////////////////////////////////////////////////////////////////////////// 59 /* Our destination struct for directing decompressed pixels to our stream 60 * object. 61 */ 62 struct skjpeg_destination_mgr : jpeg_destination_mgr { 63 skjpeg_destination_mgr(SkWStream* stream); 64 65 SkWStream* fStream; 66 67 enum { 68 kBufferSize = 1024 69 }; 70 uint8_t fBuffer[kBufferSize]; 71 }; 72 73 #endif 74