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00014 #include "plstdpch.h"
00015
00016 #include <stdio.h>
00017
00018 extern "C"
00019 {
00020 #include "jpeglib.h"
00021 #include "jerror.h"
00022 }
00023 #include "jmemsrc.h"
00024
00025
00026
00027
00028
00029
00030 METHODDEF(void)
00031 init_source (j_decompress_ptr cinfo)
00032 {
00033 }
00034
00035
00036
00037
00038
00039
00040
00041
00042
00043
00044 METHODDEF(boolean)
00045 fill_input_buffer (j_decompress_ptr cinfo)
00046 {
00047 struct jpeg_source_mgr * src = cinfo->src;
00048 static JOCTET FakeEOI[] = { 0xFF, JPEG_EOI };
00049
00050
00051 WARNMS(cinfo, JWRN_JPEG_EOF);
00052
00053
00054 src->next_input_byte = FakeEOI;
00055 src->bytes_in_buffer = 2;
00056
00057 return TRUE;
00058 }
00059
00060
00061 METHODDEF(void)
00062 skip_input_data (j_decompress_ptr cinfo, long num_bytes)
00063 {
00064 struct jpeg_source_mgr * src = cinfo->src;
00065
00066 if(num_bytes >= (long)src->bytes_in_buffer)
00067 {
00068 fill_input_buffer(cinfo);
00069 return;
00070 }
00071
00072 src->bytes_in_buffer -= num_bytes;
00073 src->next_input_byte += num_bytes;
00074 }
00075
00076
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00078
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00085
00086 METHODDEF(void)
00087 term_source (j_decompress_ptr cinfo)
00088 {
00089
00090 }
00091
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00100
00101 GLOBAL(void)
00102 jpeg_mem_src (
00103 j_decompress_ptr cinfo,
00104 JOCTET * pData,
00105 int FileSize,
00106 void *pDataSrc,
00107 JMETHOD(void, notifyCppWorld, (j_common_ptr))
00108 )
00109 {
00110 struct jpeg_source_mgr * src;
00111
00112 if (cinfo->src == NULL)
00113 {
00114 cinfo->src = (struct jpeg_source_mgr *)
00115 (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_PERMANENT,
00116 sizeof(struct jpeg_source_mgr));
00117 }
00118
00119
00120
00121
00122 if ( cinfo->progress == NULL)
00123 {
00124 cinfo->progress = (struct jpeg_progress_mgr *)
00125 (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_PERMANENT,
00126 sizeof(struct jpeg_progress_mgr));
00127
00128 cinfo->progress->progress_monitor = notifyCppWorld;
00129 }
00130
00131
00132
00133
00134
00135 cinfo->client_data = pDataSrc ;
00136
00137 src = cinfo->src;
00138
00139
00140 src->init_source = init_source;
00141 src->fill_input_buffer = fill_input_buffer;
00142 src->skip_input_data = skip_input_data;
00143 src->resync_to_restart = jpeg_resync_to_restart;
00144 src->term_source = term_source;
00145
00146
00147 src->bytes_in_buffer = FileSize;
00148 src->next_input_byte = pData;
00149 }
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