1 /* 2 * Copyright 2015 Google Inc. 3 * 4 * Use of this source code is governed by a BSD-style license that can be 5 * found in the LICENSE file. 6 */ 7 8 #ifndef SkJpegDecoderMgr_DEFINED 9 #define SkJpegDecoderMgr_DEFINED 10 11 #include "SkCodec.h" 12 #include "SkCodecPriv.h" 13 #include <stdio.h> 14 #include "SkJpegUtility.h" 15 16 extern "C" { 17 #include "jpeglib.h" 18 } 19 20 class JpegDecoderMgr : SkNoncopyable { 21 public: 22 23 /* 24 * Print a useful error message and return false 25 */ 26 bool returnFalse(const char caller[]); 27 28 /* 29 * Print a useful error message and return a decode failure 30 */ 31 SkCodec::Result returnFailure(const char caller[], SkCodec::Result result); 32 33 /* 34 * Create the decode manager 35 * Does not take ownership of stream 36 */ 37 JpegDecoderMgr(SkStream* stream); 38 39 /* 40 * Initialize decompress struct 41 * Initialize the source manager 42 */ 43 void init(); 44 45 /* 46 * Returns true if it successfully sets outColor to the encoded color, 47 * and false otherwise. 48 */ 49 bool getEncodedColor(SkEncodedInfo::Color* outColor); 50 51 /* 52 * Free memory used by the decode manager 53 */ 54 ~JpegDecoderMgr(); 55 56 /* 57 * Get the skjpeg_error_mgr in order to set an error return jmp_buf 58 */ errorMgr()59 skjpeg_error_mgr* errorMgr() { return &fErrorMgr; } 60 61 /* 62 * Get function for the decompress info struct 63 */ dinfo()64 jpeg_decompress_struct* dinfo() { return &fDInfo; } 65 66 private: 67 68 jpeg_decompress_struct fDInfo; 69 skjpeg_source_mgr fSrcMgr; 70 skjpeg_error_mgr fErrorMgr; 71 jpeg_progress_mgr fProgressMgr; 72 bool fInit; 73 }; 74 75 #endif 76