Doxygen Source Code Documentation
jdatadst.c File Reference
#include "jinclude.h"#include "jpeglib.h"#include "jerror.h"Go to the source code of this file.
Data Structures | |
| struct | my_destination_mgr |
Defines | |
| #define | OUTPUT_BUF_SIZE 4096 |
Typedefs | |
| typedef my_destination_mgr * | my_dest_ptr |
Functions | |
| init_destination (j_compress_ptr cinfo) | |
| empty_output_buffer (j_compress_ptr cinfo) | |
| term_destination (j_compress_ptr cinfo) | |
| jpeg_stdio_dest (j_compress_ptr cinfo, FILE *outfile) | |
Define Documentation
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Definition at line 34 of file jdatadst.c. Referenced by empty_output_buffer(), init_destination(), and term_destination(). |
Typedef Documentation
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Definition at line 32 of file jdatadst.c. |
Function Documentation
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Definition at line 81 of file jdatadst.c. References my_destination_mgr::buffer, jpeg_compress_struct::dest, ERREXIT, jpeg_destination_mgr::free_in_buffer, JFWRITE, jpeg_destination_mgr::next_output_byte, my_destination_mgr::outfile, OUTPUT_BUF_SIZE, and my_destination_mgr::pub. Referenced by jpeg_stdio_dest().
00082 {
00083 my_dest_ptr dest = (my_dest_ptr) cinfo->dest;
00084
00085 if (JFWRITE(dest->outfile, dest->buffer, OUTPUT_BUF_SIZE) !=
00086 (size_t) OUTPUT_BUF_SIZE)
00087 ERREXIT(cinfo, JERR_FILE_WRITE);
00088
00089 dest->pub.next_output_byte = dest->buffer;
00090 dest->pub.free_in_buffer = OUTPUT_BUF_SIZE;
00091
00092 return TRUE;
00093 }
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Definition at line 43 of file jdatadst.c. References my_destination_mgr::buffer, jpeg_compress_struct::dest, jpeg_destination_mgr::free_in_buffer, JOCTET, JPOOL_IMAGE, jpeg_destination_mgr::next_output_byte, OUTPUT_BUF_SIZE, my_destination_mgr::pub, and SIZEOF. Referenced by jpeg_stdio_dest().
00044 {
00045 my_dest_ptr dest = (my_dest_ptr) cinfo->dest;
00046
00047 /* Allocate the output buffer --- it will be released when done with image */
00048 dest->buffer = (JOCTET *)
00049 (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
00050 OUTPUT_BUF_SIZE * SIZEOF(JOCTET));
00051
00052 dest->pub.next_output_byte = dest->buffer;
00053 dest->pub.free_in_buffer = OUTPUT_BUF_SIZE;
00054 }
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Definition at line 130 of file jdatadst.c. References jpeg_compress_struct::dest, empty_output_buffer(), init_destination(), my_destination_mgr::outfile, my_destination_mgr::pub, and term_destination(). Referenced by main(), and write_JPEG_file().
00131 {
00132 my_dest_ptr dest;
00133
00134 /* The destination object is made permanent so that multiple JPEG images
00135 * can be written to the same file without re-executing jpeg_stdio_dest.
00136 * This makes it dangerous to use this manager and a different destination
00137 * manager serially with the same JPEG object, because their private object
00138 * sizes may be different. Caveat programmer.
00139 */
00140 if (cinfo->dest == NULL) { /* first time for this JPEG object? */
00141 cinfo->dest = (struct jpeg_destination_mgr *)
00142 (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_PERMANENT,
00143 SIZEOF(my_destination_mgr));
00144 }
00145
00146 dest = (my_dest_ptr) cinfo->dest;
00147 dest->pub.init_destination = init_destination;
00148 dest->pub.empty_output_buffer = empty_output_buffer;
00149 dest->pub.term_destination = term_destination;
00150 dest->outfile = outfile;
00151 }
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Definition at line 106 of file jdatadst.c. References my_destination_mgr::buffer, jpeg_compress_struct::dest, ERREXIT, jpeg_destination_mgr::free_in_buffer, JFWRITE, my_destination_mgr::outfile, OUTPUT_BUF_SIZE, and my_destination_mgr::pub. Referenced by jpeg_stdio_dest().
00107 {
00108 my_dest_ptr dest = (my_dest_ptr) cinfo->dest;
00109 size_t datacount = OUTPUT_BUF_SIZE - dest->pub.free_in_buffer;
00110
00111 /* Write any data remaining in the buffer */
00112 if (datacount > 0) {
00113 if (JFWRITE(dest->outfile, dest->buffer, datacount) != datacount)
00114 ERREXIT(cinfo, JERR_FILE_WRITE);
00115 }
00116 fflush(dest->outfile);
00117 /* Make sure we wrote the output file OK */
00118 if (ferror(dest->outfile))
00119 ERREXIT(cinfo, JERR_FILE_WRITE);
00120 }
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