michael@0: 
michael@0: /*
michael@0:  * Copyright 2010 The Android Open Source Project
michael@0:  *
michael@0:  * Use of this source code is governed by a BSD-style license that can be
michael@0:  * found in the LICENSE file.
michael@0:  */
michael@0: 
michael@0: 
michael@0: #ifndef SkJpegUtility_DEFINED
michael@0: #define SkJpegUtility_DEFINED
michael@0: 
michael@0: #include "SkImageDecoder.h"
michael@0: #include "SkStream.h"
michael@0: 
michael@0: extern "C" {
michael@0:     #include "jpeglib.h"
michael@0:     #include "jerror.h"
michael@0: }
michael@0: 
michael@0: #include <setjmp.h>
michael@0: 
michael@0: /* Our error-handling struct.
michael@0:  *
michael@0: */
michael@0: struct skjpeg_error_mgr : jpeg_error_mgr {
michael@0:     jmp_buf fJmpBuf;
michael@0: };
michael@0: 
michael@0: 
michael@0: void skjpeg_error_exit(j_common_ptr cinfo);
michael@0: 
michael@0: ///////////////////////////////////////////////////////////////////////////
michael@0: /* Our source struct for directing jpeg to our stream object.
michael@0: */
michael@0: struct skjpeg_source_mgr : jpeg_source_mgr {
michael@0:     skjpeg_source_mgr(SkStream* stream, SkImageDecoder* decoder);
michael@0:     ~skjpeg_source_mgr();
michael@0: 
michael@0:     // fStream is ref'ed and unref'ed
michael@0:     SkStream*       fStream;
michael@0:     // Unowned pointer to the decoder, used to check if the decoding process
michael@0:     // has been cancelled.
michael@0:     SkImageDecoder* fDecoder;
michael@0:     enum {
michael@0:         kBufferSize = 1024
michael@0:     };
michael@0:     char    fBuffer[kBufferSize];
michael@0: };
michael@0: 
michael@0: /////////////////////////////////////////////////////////////////////////////
michael@0: /* Our destination struct for directing decompressed pixels to our stream
michael@0:  * object.
michael@0:  */
michael@0: struct skjpeg_destination_mgr : jpeg_destination_mgr {
michael@0:     skjpeg_destination_mgr(SkWStream* stream);
michael@0: 
michael@0:     SkWStream*  fStream;
michael@0: 
michael@0:     enum {
michael@0:         kBufferSize = 1024
michael@0:     };
michael@0:     uint8_t fBuffer[kBufferSize];
michael@0: };
michael@0: 
michael@0: #endif