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); 45 46 SkStream* fStream; 47 const void* fMemoryBase; 48 size_t fMemoryBaseSize; 49 SkImageDecoder* fDecoder; 50 enum { 51 kBufferSize = 1024 52 }; 53 char fBuffer[kBufferSize]; 54 }; 55 56 ///////////////////////////////////////////////////////////////////////////// 57 /* Our destination struct for directing decompressed pixels to our stream 58 * object. 59 */ 60 struct skjpeg_destination_mgr : jpeg_destination_mgr { 61 skjpeg_destination_mgr(SkWStream* stream); 62 63 SkWStream* fStream; 64 65 enum { 66 kBufferSize = 1024 67 }; 68 uint8_t fBuffer[kBufferSize]; 69 }; 70 71 #endif 72
