1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
|
<!doctype html public "-//W3C//DTD HTML 4.0 Transitional//EN" "http://www.w3.org/TR/REC-html40/loose.dtd">
<HTML>
<HEAD>
<TITLE>nevrax.org : docs</TITLE>
<LINK REL=stylesheet TYPE="text/css" HREF="/inc/css/nevrax.css">
<link href="doxygen.css" rel="stylesheet" type="text/css">
</HEAD>
<BODY MARGINHEIGHT="0" MARGINWIDTH="0">
<!-- uplinks -->
<TABLE CELLSPACING=0 CELLPADDING=0 BORDER=0>
<TR>
<TD WIDTH=16><IMG SRC="/inc/img/pixel.gif" WIDTH="16" HEIGHT="16" BORDER=0 ALT=""></TD>
<TD WIDTH=140 BGCOLOR=#dddddd><IMG SRC="/inc/img/pixel.gif" WIDTH="140" HEIGHT="16" BORDER=0 ALT=""></TD>
<TD WIDTH=16><IMG SRC="/inc/img/pixel.gif" WIDTH="16" HEIGHT="16" BORDER=0 ALT=""></TD>
<TD><IMG width=6 height=14 SRC="/inc/img/reddots.gif" ALT="#" VSPACE=2 HSPACE=2 BORDER=0 ></TD><TD VALIGN=middle> <A CLASS=uplinks HREF=><b>Home</B></FONT></A> </TD>
<TD><IMG width=6 height=14 SRC="/inc/img/reddots.gif" ALT="#" VSPACE=2 HSPACE=2 BORDER=0 ></TD><TD VALIGN=middle> <A CLASS=uplinks HREF=><b>nevrax.com</B></FONT></A> </TD>
</TR>
</TABLE>
<!-- banner Nevrax -->
<TABLE CELLSPACING=0 CELLPADDING=0 BORDER=0 WIDTH=100%>
<TR><TD BGCOLOR="#000000" BACKGROUND="/inc/img/black_banner.jpg"><A HREF=""><IMG SRC="/inc/img/nevrax.gif" WIDTH="170" HEIGHT="45" BORDER=0 ALT="Nevrax" ></A></TD></TR>
</TABLE>
<!-- main table -->
<TABLE CELLSPACING=0 CELLPADDING=0 BORDER=0 height=100%>
<TR>
<TD WIDTH=16><IMG SRC="/inc/img/pixel.gif" WIDTH="16" HEIGHT="10" BORDER=0 ALT=""></TD>
<TD WIDTH=140 BGCOLOR=#dddddd VALIGN=TOP ALIGN=middle><IMG SRC="/inc/img/pixel.gif" WIDTH="140" HEIGHT="10" BORDER=0 ALT="">
<!------ Begin Box ------>
<TABLE BORDER=0 CELLSPACING=0 CELLPADDING=0 BGCOLOR=black><TR><TD><TABLE border=0 cellspacing=2 cellpadding=0 width=120><tr><TD ALIGN=middle bgcolor=black>
<FONT COLOR=white FACE="sans-serif"><B>Nevrax.org</B></FONT></TD></TR><tr><td colspan=2 bgcolor=#FFFFFF>
<TABLE cellspacing=0 cellpadding=1 border=0>
<tr><td ALIGN=middle><a class='linkbox' href="/news/" TITLE="Rubrique news"><img width=13 height=15 hspace=5 border=0 src=/inc/img/picto-news.gif ALT=#></A></td><td><a class='linkbox' href="/news/" TITLE="News">News</a></td></tr>
<tr><td ALIGN=middle><a class='linkbox' href="/mail/" TITLE="Rubrique mail"><img width=15 height=11 hspace=5 border=0 src=/inc/img/picto-mail.gif ALT=#></A></td><td><a class='linkbox' href="/mail/" TITLE="Mailing list archive">Mailing-list</a></td></tr>
<tr><td ALIGN=middle><a class='linkbox' href="/docs/" TITLE="Rubrique docs"><img width=14 height=16 hspace=5 border=0 src=/inc/img/picto-docs.gif ALT=#></A></td><td><a class='linkbox' href="/docs/" TITLE="Documentation">Documentation</a></td></tr>
<tr><td ALIGN=middle><a class='linkbox' href="/cvs/" TITLE="Rubrique cvs"><img width=13 height=17 hspace=5 border=0 src=/inc/img/picto-cvs.gif ALT=#></A></td><td><a class='linkbox' href="/cvs/" TITLE="CVS Web">CVS</a></td></tr>
<tr><td ALIGN=middle><a class='linkbox' href="/bugs/" TITLE="Rubrique bugs"><img width=20 height=16 hspace=5 border=0 src=/inc/img/picto-bugs.gif ALT=#></A></td><td><a class='linkbox' href="/bugs/" TITLE="Bugtracking">Bugs</a></td></tr>
<tr><td ALIGN=middle><a class='linkbox' href="/GPL.php3" TITLE="Rubrique license"><img width=18 height=12 hspace=5 border=0 src=/inc/img/picto-gpl.gif ALT=#></A></td><td><a class='linkbox' href="/GPL.php3" TITLE="License">License</a></td></tr>
</TABLE>
</TD></TR></TABLE></TD></TR></TABLE>
<!------ End Box ------>
</TD>
<TD WIDTH=15><IMG SRC="/inc/img/pixel.gif" WIDTH="16" HEIGHT="16" BORDER=0 ALT=""></TD>
<TD ALIGN=left valign=top><IMG SRC="/inc/img/pixel.gif" WIDTH="140" HEIGHT="10" BORDER=0 ALT="">
<!-- title -->
<TABLE background="/inc/img/redline.gif" CELLSPACING=0 CELLPADDING=0 BORDER=0 width=100%><tr><td>
<A HREF="/docs/"><img src="/inc/img/t_docs.gif" ALT="Docs" HEIGHT=20 BORDER=0></A>
</td><td><IMG SRC="/inc/img/pixel.gif" WIDTH="1" HEIGHT="1" BORDER=0 ALT="">
</td></tr></table>
<!-- block -->
<TABLE bgcolor="#dddddd" CELLSPACING=0 CELLPADDING=0 BORDER=0 width=100%><tr><td width=1% valign=middle><img width=6 height=14 hspace=2 vspace=2 src="/inc/img/reddots.gif"></TD>
<TD><B>Documentation</B></TD>
<TD ALIGN=RIGHT> </td>
</tr></table>
<!-- Generated by Doxygen 1.2.2 on Tue May 29 22:01:11 2001 -->
<center>
<a class="qindex" href="index.html">Main Page</a> <a class="qindex" href="namespaces.html">Namespace List</a> <a class="qindex" href="hierarchy.html">Class Hierarchy</a> <a class="qindex" href="classes.html">Alphabetical List</a> <a class="qindex" href="annotated.html">Compound List</a> <a class="qindex" href="files.html">File List</a> <a class="qindex" href="namespacemembers.html">Namespace Members</a> <a class="qindex" href="functions.html">Compound Members</a> <a class="qindex" href="globals.html">File Members</a> <a class="qindex" href="pages.html">Related Pages</a> <a class="qindexRef" doxygen="_cgi:/cgi-bin/nel-search.cgi" href="/cgi-bin/nel-search.cgi">Search</a> </center>
<hr><h1>jpeglib.h</h1><a href="jpeglib_h.html">Go to the documentation of this file.</a><div class="fragment"><pre>00001 <font class="comment">/*
</font>00002 <font class="comment"> * jpeglib.h
</font>00003 <font class="comment"> *
</font>00004 <font class="comment"> * Copyright (C) 1991-1998, Thomas G. Lane.
</font>00005 <font class="comment"> * This file is part of the Independent JPEG Group's software.
</font>00006 <font class="comment"> * For conditions of distribution and use, see the accompanying README file.
</font>00007 <font class="comment"> *
</font>00008 <font class="comment"> * This file defines the application interface for the JPEG library.
</font>00009 <font class="comment"> * Most applications using the library need only include this file,
</font>00010 <font class="comment"> * and perhaps jerror.h if they want to know the exact error codes.
</font>00011 <font class="comment"> */</font>
00012
00013 <font class="preprocessor">#ifndef JPEGLIB_H
</font>00014 <font class="preprocessor"></font><font class="preprocessor">#define JPEGLIB_H
</font>00015 <font class="preprocessor"></font>
00016 <font class="comment">/*
</font>00017 <font class="comment"> * First we include the configuration files that record how this
</font>00018 <font class="comment"> * installation of the JPEG library is set up. jconfig.h can be
</font>00019 <font class="comment"> * generated automatically for many systems. jmorecfg.h contains
</font>00020 <font class="comment"> * manual configuration options that most people need not worry about.
</font>00021 <font class="comment"> */</font>
00022
00023 <font class="preprocessor">#ifndef JCONFIG_INCLUDED </font><font class="comment">/* in case jinclude.h already did */</font>
00024 <font class="preprocessor">#include "<a class="code" href="jconfig_h.html">jconfig.h</a>"</font> <font class="comment">/* widely used configuration options */</font>
00025 <font class="preprocessor">#endif
</font>00026 <font class="preprocessor"></font><font class="preprocessor">#include "<a class="code" href="jmorecfg_h.html">jmorecfg.h</a>"</font> <font class="comment">/* seldom changed options */</font>
00027
00028
00029 <font class="comment">/* Version ID for the JPEG library.
</font>00030 <font class="comment"> * Might be useful for tests like "#if JPEG_LIB_VERSION >= 60".
</font>00031 <font class="comment"> */</font>
00032
<a name="l00033"></a><a class="code" href="jpeglib_h.html#a0">00033</a> <font class="preprocessor">#define JPEG_LIB_VERSION 62 </font><font class="comment">/* Version 6b */</font>
00034
00035
00036 <font class="comment">/* Various constants determining the sizes of things.
</font>00037 <font class="comment"> * All of these are specified by the JPEG standard, so don't change them
</font>00038 <font class="comment"> * if you want to be compatible.
</font>00039 <font class="comment"> */</font>
00040
<a name="l00041"></a><a class="code" href="jpeglib_h.html#a1">00041</a> <font class="preprocessor">#define DCTSIZE 8 </font><font class="comment">/* The basic DCT block is 8x8 samples */</font>
<a name="l00042"></a><a class="code" href="jpeglib_h.html#a2">00042</a> <font class="preprocessor">#define DCTSIZE2 64 </font><font class="comment">/* DCTSIZE squared; # of elements in a block */</font>
<a name="l00043"></a><a class="code" href="jpeglib_h.html#a3">00043</a> <font class="preprocessor">#define NUM_QUANT_TBLS 4 </font><font class="comment">/* Quantization tables are numbered 0..3 */</font>
<a name="l00044"></a><a class="code" href="jpeglib_h.html#a4">00044</a> <font class="preprocessor">#define NUM_HUFF_TBLS 4 </font><font class="comment">/* Huffman tables are numbered 0..3 */</font>
<a name="l00045"></a><a class="code" href="jpeglib_h.html#a5">00045</a> <font class="preprocessor">#define NUM_ARITH_TBLS 16 </font><font class="comment">/* Arith-coding tables are numbered 0..15 */</font>
<a name="l00046"></a><a class="code" href="jpeglib_h.html#a6">00046</a> <font class="preprocessor">#define MAX_COMPS_IN_SCAN 4 </font><font class="comment">/* JPEG limit on # of components in one scan */</font>
<a name="l00047"></a><a class="code" href="jpeglib_h.html#a7">00047</a> <font class="preprocessor">#define MAX_SAMP_FACTOR 4 </font><font class="comment">/* JPEG limit on sampling factors */</font>
00048 <font class="comment">/* Unfortunately, some bozo at Adobe saw no reason to be bound by the standard;
</font>00049 <font class="comment"> * the PostScript DCT filter can emit files with many more than 10 blocks/MCU.
</font>00050 <font class="comment"> * If you happen to run across such a file, you can up D_MAX_BLOCKS_IN_MCU
</font>00051 <font class="comment"> * to handle it. We even let you do this from the jconfig.h file. However,
</font>00052 <font class="comment"> * we strongly discourage changing C_MAX_BLOCKS_IN_MCU; just because Adobe
</font>00053 <font class="comment"> * sometimes emits noncompliant files doesn't mean you should too.
</font>00054 <font class="comment"> */</font>
<a name="l00055"></a><a class="code" href="jpeglib_h.html#a8">00055</a> <font class="preprocessor">#define C_MAX_BLOCKS_IN_MCU 10 </font><font class="comment">/* compressor's limit on blocks per MCU */</font>
00056 <font class="preprocessor">#ifndef D_MAX_BLOCKS_IN_MCU
</font><a name="l00057"></a><a class="code" href="jpeglib_h.html#a9">00057</a> <font class="preprocessor"></font><font class="preprocessor">#define D_MAX_BLOCKS_IN_MCU 10 </font><font class="comment">/* decompressor's limit on blocks per MCU */</font>
00058 <font class="preprocessor">#endif
</font>00059 <font class="preprocessor"></font>
00060
00061 <font class="comment">/* Data structures for images (arrays of samples and of DCT coefficients).
</font>00062 <font class="comment"> * On 80x86 machines, the image arrays are too big for near pointers,
</font>00063 <font class="comment"> * but the pointer arrays can fit in near memory.
</font>00064 <font class="comment"> */</font>
00065
<a name="l00066"></a><a class="code" href="jpeglib_h.html#a32">00066</a> <font class="keyword">typedef</font> JSAMPLE <a class="code" href="class_jpeg_marker_struct.html">FAR</a> *JSAMPROW; <font class="comment">/* ptr to one image row of pixel samples. */</font>
<a name="l00067"></a><a class="code" href="jpeglib_h.html#a33">00067</a> <font class="keyword">typedef</font> JSAMPROW *JSAMPARRAY; <font class="comment">/* ptr to some rows (a 2-D sample array) */</font>
<a name="l00068"></a><a class="code" href="jpeglib_h.html#a34">00068</a> <font class="keyword">typedef</font> JSAMPARRAY *JSAMPIMAGE; <font class="comment">/* a 3-D sample array: top index is color */</font>
00069
<a name="l00070"></a><a class="code" href="jpeglib_h.html#a35">00070</a> <font class="keyword">typedef</font> JCOEF JBLOCK[DCTSIZE2]; <font class="comment">/* one block of coefficients */</font>
<a name="l00071"></a><a class="code" href="jpeglib_h.html#a36">00071</a> <font class="keyword">typedef</font> JBLOCK <a class="code" href="class_jpeg_marker_struct.html">FAR</a> *JBLOCKROW; <font class="comment">/* pointer to one row of coefficient blocks */</font>
<a name="l00072"></a><a class="code" href="jpeglib_h.html#a37">00072</a> <font class="keyword">typedef</font> JBLOCKROW *JBLOCKARRAY; <font class="comment">/* a 2-D array of coefficient blocks */</font>
<a name="l00073"></a><a class="code" href="jpeglib_h.html#a38">00073</a> <font class="keyword">typedef</font> JBLOCKARRAY *JBLOCKIMAGE; <font class="comment">/* a 3-D array of coefficient blocks */</font>
00074
<a name="l00075"></a><a class="code" href="jpeglib_h.html#a39">00075</a> <font class="keyword">typedef</font> JCOEF <a class="code" href="class_jpeg_marker_struct.html">FAR</a> *JCOEFPTR; <font class="comment">/* useful in a couple of places */</font>
00076
00077
00078 <font class="comment">/* Types for JPEG compression parameters and working tables. */</font>
00079
00080
00081 <font class="comment">/* DCT coefficient quantization tables. */</font>
00082
<a name="l00083"></a><a class="code" href="class_JQUANT_TBL.html">00083</a> <font class="keyword">typedef</font> <font class="keyword">struct </font>{
00084 <font class="comment">/* This array gives the coefficient quantizers in natural array order
</font>00085 <font class="comment"> * (not the zigzag order in which they are stored in a JPEG DQT marker).
</font>00086 <font class="comment"> * CAUTION: IJG versions prior to v6a kept this array in zigzag order.
</font>00087 <font class="comment"> */</font>
<a name="l00088"></a><a class="code" href="class_JQUANT_TBL.html#m0">00088</a> UINT16 quantval[DCTSIZE2]; <font class="comment">/* quantization step for each coefficient */</font>
00089 <font class="comment">/* This field is used only during compression. It's initialized FALSE when
</font>00090 <font class="comment"> * the table is created, and set TRUE when it's been output to the file.
</font>00091 <font class="comment"> * You could suppress output of a table by setting this to TRUE.
</font>00092 <font class="comment"> * (See jpeg_suppress_tables for an example.)
</font>00093 <font class="comment"> */</font>
<a name="l00094"></a><a class="code" href="class_JQUANT_TBL.html#m1">00094</a> boolean sent_table; <font class="comment">/* TRUE when table has been output */</font>
00095 } <a class="code" href="class_JQUANT_TBL.html">JQUANT_TBL</a>;
00096
00097
00098 <font class="comment">/* Huffman coding tables. */</font>
00099
<a name="l00100"></a><a class="code" href="class_JHUFF_TBL.html">00100</a> <font class="keyword">typedef</font> <font class="keyword">struct </font>{
00101 <font class="comment">/* These two fields directly represent the contents of a JPEG DHT marker */</font>
<a name="l00102"></a><a class="code" href="class_JHUFF_TBL.html#m0">00102</a> UINT8 bits[17]; <font class="comment">/* bits[k] = # of symbols with codes of */</font>
00103 <font class="comment">/* length k bits; bits[0] is unused */</font>
<a name="l00104"></a><a class="code" href="class_JHUFF_TBL.html#m1">00104</a> UINT8 huffval[256]; <font class="comment">/* The symbols, in order of incr code length */</font>
00105 <font class="comment">/* This field is used only during compression. It's initialized FALSE when
</font>00106 <font class="comment"> * the table is created, and set TRUE when it's been output to the file.
</font>00107 <font class="comment"> * You could suppress output of a table by setting this to TRUE.
</font>00108 <font class="comment"> * (See jpeg_suppress_tables for an example.)
</font>00109 <font class="comment"> */</font>
<a name="l00110"></a><a class="code" href="class_JHUFF_TBL.html#m2">00110</a> boolean sent_table; <font class="comment">/* TRUE when table has been output */</font>
00111 } <a class="code" href="class_JHUFF_TBL.html">JHUFF_TBL</a>;
00112
00113
00114 <font class="comment">/* Basic info about one component (color channel). */</font>
00115
<a name="l00116"></a><a class="code" href="class_jpeg_component_info.html">00116</a> <font class="keyword">typedef</font> <font class="keyword">struct </font>{
00117 <font class="comment">/* These values are fixed over the whole image. */</font>
00118 <font class="comment">/* For compression, they must be supplied by parameter setup; */</font>
00119 <font class="comment">/* for decompression, they are read from the SOF marker. */</font>
<a name="l00120"></a><a class="code" href="class_jpeg_component_info.html#m0">00120</a> <font class="keywordtype">int</font> component_id; <font class="comment">/* identifier for this component (0..255) */</font>
<a name="l00121"></a><a class="code" href="class_jpeg_component_info.html#m1">00121</a> <font class="keywordtype">int</font> component_index; <font class="comment">/* its index in SOF or cinfo->comp_info[] */</font>
<a name="l00122"></a><a class="code" href="class_jpeg_component_info.html#m2">00122</a> <font class="keywordtype">int</font> h_samp_factor; <font class="comment">/* horizontal sampling factor (1..4) */</font>
<a name="l00123"></a><a class="code" href="class_jpeg_component_info.html#m3">00123</a> <font class="keywordtype">int</font> v_samp_factor; <font class="comment">/* vertical sampling factor (1..4) */</font>
<a name="l00124"></a><a class="code" href="class_jpeg_component_info.html#m4">00124</a> <font class="keywordtype">int</font> quant_tbl_no; <font class="comment">/* quantization table selector (0..3) */</font>
00125 <font class="comment">/* These values may vary between scans. */</font>
00126 <font class="comment">/* For compression, they must be supplied by parameter setup; */</font>
00127 <font class="comment">/* for decompression, they are read from the SOS marker. */</font>
00128 <font class="comment">/* The decompressor output side may not use these variables. */</font>
<a name="l00129"></a><a class="code" href="class_jpeg_component_info.html#m5">00129</a> <font class="keywordtype">int</font> dc_tbl_no; <font class="comment">/* DC entropy table selector (0..3) */</font>
<a name="l00130"></a><a class="code" href="class_jpeg_component_info.html#m6">00130</a> <font class="keywordtype">int</font> ac_tbl_no; <font class="comment">/* AC entropy table selector (0..3) */</font>
00131
00132 <font class="comment">/* Remaining fields should be treated as private by applications. */</font>
00133
00134 <font class="comment">/* These values are computed during compression or decompression startup: */</font>
00135 <font class="comment">/* Component's size in DCT blocks.
</font>00136 <font class="comment"> * Any dummy blocks added to complete an MCU are not counted; therefore
</font>00137 <font class="comment"> * these values do not depend on whether a scan is interleaved or not.
</font>00138 <font class="comment"> */</font>
<a name="l00139"></a><a class="code" href="class_jpeg_component_info.html#m7">00139</a> JDIMENSION width_in_blocks;
<a name="l00140"></a><a class="code" href="class_jpeg_component_info.html#m8">00140</a> JDIMENSION height_in_blocks;
00141 <font class="comment">/* Size of a DCT block in samples. Always DCTSIZE for compression.
</font>00142 <font class="comment"> * For decompression this is the size of the output from one DCT block,
</font>00143 <font class="comment"> * reflecting any scaling we choose to apply during the IDCT step.
</font>00144 <font class="comment"> * Values of 1,2,4,8 are likely to be supported. Note that different
</font>00145 <font class="comment"> * components may receive different IDCT scalings.
</font>00146 <font class="comment"> */</font>
<a name="l00147"></a><a class="code" href="class_jpeg_component_info.html#m9">00147</a> <font class="keywordtype">int</font> DCT_scaled_size;
00148 <font class="comment">/* The downsampled dimensions are the component's actual, unpadded number
</font>00149 <font class="comment"> * of samples at the main buffer (preprocessing/compression interface), thus
</font>00150 <font class="comment"> * downsampled_width = ceil(image_width * Hi/Hmax)
</font>00151 <font class="comment"> * and similarly for height. For decompression, IDCT scaling is included, so
</font>00152 <font class="comment"> * downsampled_width = ceil(image_width * Hi/Hmax * DCT_scaled_size/DCTSIZE)
</font>00153 <font class="comment"> */</font>
<a name="l00154"></a><a class="code" href="class_jpeg_component_info.html#m10">00154</a> JDIMENSION downsampled_width; <font class="comment">/* actual width in samples */</font>
<a name="l00155"></a><a class="code" href="class_jpeg_component_info.html#m11">00155</a> JDIMENSION downsampled_height; <font class="comment">/* actual height in samples */</font>
00156 <font class="comment">/* This flag is used only for decompression. In cases where some of the
</font>00157 <font class="comment"> * components will be ignored (eg grayscale output from YCbCr image),
</font>00158 <font class="comment"> * we can skip most computations for the unused components.
</font>00159 <font class="comment"> */</font>
<a name="l00160"></a><a class="code" href="class_jpeg_component_info.html#m12">00160</a> boolean component_needed; <font class="comment">/* do we need the value of this component? */</font>
00161
00162 <font class="comment">/* These values are computed before starting a scan of the component. */</font>
00163 <font class="comment">/* The decompressor output side may not use these variables. */</font>
<a name="l00164"></a><a class="code" href="class_jpeg_component_info.html#m13">00164</a> <font class="keywordtype">int</font> MCU_width; <font class="comment">/* number of blocks per MCU, horizontally */</font>
<a name="l00165"></a><a class="code" href="class_jpeg_component_info.html#m14">00165</a> <font class="keywordtype">int</font> MCU_height; <font class="comment">/* number of blocks per MCU, vertically */</font>
<a name="l00166"></a><a class="code" href="class_jpeg_component_info.html#m15">00166</a> <font class="keywordtype">int</font> MCU_blocks; <font class="comment">/* MCU_width * MCU_height */</font>
<a name="l00167"></a><a class="code" href="class_jpeg_component_info.html#m16">00167</a> <font class="keywordtype">int</font> MCU_sample_width; <font class="comment">/* MCU width in samples, MCU_width*DCT_scaled_size */</font>
<a name="l00168"></a><a class="code" href="class_jpeg_component_info.html#m17">00168</a> <font class="keywordtype">int</font> last_col_width; <font class="comment">/* # of non-dummy blocks across in last MCU */</font>
<a name="l00169"></a><a class="code" href="class_jpeg_component_info.html#m18">00169</a> <font class="keywordtype">int</font> last_row_height; <font class="comment">/* # of non-dummy blocks down in last MCU */</font>
00170
00171 <font class="comment">/* Saved quantization table for component; NULL if none yet saved.
</font>00172 <font class="comment"> * See jdinput.c comments about the need for this information.
</font>00173 <font class="comment"> * This field is currently used only for decompression.
</font>00174 <font class="comment"> */</font>
<a name="l00175"></a><a class="code" href="class_jpeg_component_info.html#m19">00175</a> <a class="code" href="class_JQUANT_TBL.html">JQUANT_TBL</a> * quant_table;
00176
00177 <font class="comment">/* Private per-component storage for DCT or IDCT subsystem. */</font>
<a name="l00178"></a><a class="code" href="class_jpeg_component_info.html#m20">00178</a> <font class="keywordtype">void</font> * dct_table;
00179 } <a class="code" href="class_jpeg_component_info.html">jpeg_component_info</a>;
00180
00181
00182 <font class="comment">/* The script for encoding a multiple-scan file is an array of these: */</font>
00183
<a name="l00184"></a><a class="code" href="class_jpeg_scan_info.html">00184</a> <font class="keyword">typedef</font> <font class="keyword">struct </font>{
<a name="l00185"></a><a class="code" href="class_jpeg_scan_info.html#m0">00185</a> <font class="keywordtype">int</font> comps_in_scan; <font class="comment">/* number of components encoded in this scan */</font>
<a name="l00186"></a><a class="code" href="class_jpeg_scan_info.html#m1">00186</a> <font class="keywordtype">int</font> component_index[MAX_COMPS_IN_SCAN]; <font class="comment">/* their SOF/comp_info[] indexes */</font>
<a name="l00187"></a><a class="code" href="class_jpeg_scan_info.html#m2">00187</a> <font class="keywordtype">int</font> Ss, Se; <font class="comment">/* progressive JPEG spectral selection parms */</font>
<a name="l00188"></a><a class="code" href="class_jpeg_scan_info.html#m5">00188</a> <font class="keywordtype">int</font> Ah, Al; <font class="comment">/* progressive JPEG successive approx. parms */</font>
00189 } <a class="code" href="class_jpeg_scan_info.html">jpeg_scan_info</a>;
00190
00191 <font class="comment">/* The decompressor can save APPn and COM markers in a list of these: */</font>
00192
<a name="l00193"></a><a class="code" href="jpeglib_h.html#a40">00193</a> <font class="keyword">typedef</font> <font class="keyword">struct </font><a class="code" href="class_jpeg_marker_struct.html">jpeg_marker_struct</a> <a class="code" href="class_jpeg_marker_struct.html">FAR</a> * <a class="code" href="class_jpeg_marker_struct.html">jpeg_saved_marker_ptr</a>;
00194
<a name="l00195"></a><a class="code" href="class_jpeg_marker_struct.html">00195</a> <font class="keyword">struct </font><a class="code" href="class_jpeg_marker_struct.html">jpeg_marker_struct</a> {
<a name="l00196"></a><a class="code" href="class_jpeg_marker_struct.html#m0">00196</a> <a class="code" href="class_jpeg_marker_struct.html">jpeg_saved_marker_ptr</a> next; <font class="comment">/* next in list, or NULL */</font>
<a name="l00197"></a><a class="code" href="class_jpeg_marker_struct.html#m1">00197</a> UINT8 marker; <font class="comment">/* marker code: JPEG_COM, or JPEG_APP0+n */</font>
<a name="l00198"></a><a class="code" href="class_jpeg_marker_struct.html#m2">00198</a> <font class="keywordtype">unsigned</font> <font class="keywordtype">int</font> original_length; <font class="comment">/* # bytes of data in the file */</font>
<a name="l00199"></a><a class="code" href="class_jpeg_marker_struct.html#m3">00199</a> <font class="keywordtype">unsigned</font> <font class="keywordtype">int</font> data_length; <font class="comment">/* # bytes of data saved at data[] */</font>
<a name="l00200"></a><a class="code" href="class_jpeg_marker_struct.html#m4">00200</a> JOCTET <a class="code" href="class_jpeg_marker_struct.html">FAR</a> * data; <font class="comment">/* the data contained in the marker */</font>
00201 <font class="comment">/* the marker length word is not counted in data_length or original_length */</font>
00202 };
00203
00204 <font class="comment">/* Known color spaces. */</font>
00205
<a name="l00206"></a><a class="code" href="jpeglib_h.html#a65">00206</a> <font class="keyword">typedef</font> <font class="keyword">enum</font> {
00207 JCS_UNKNOWN, <font class="comment">/* error/unspecified */</font>
00208 JCS_GRAYSCALE, <font class="comment">/* monochrome */</font>
00209 JCS_RGB, <font class="comment">/* red/green/blue */</font>
00210 JCS_YCbCr, <font class="comment">/* Y/Cb/Cr (also known as YUV) */</font>
00211 JCS_CMYK, <font class="comment">/* C/M/Y/K */</font>
00212 JCS_YCCK <font class="comment">/* Y/Cb/Cr/K */</font>
00213 } J_COLOR_SPACE;
00214
00215 <font class="comment">/* DCT/IDCT algorithm options. */</font>
00216
<a name="l00217"></a><a class="code" href="jpeglib_h.html#a66">00217</a> <font class="keyword">typedef</font> <font class="keyword">enum</font> {
00218 JDCT_ISLOW, <font class="comment">/* slow but accurate integer algorithm */</font>
00219 JDCT_IFAST, <font class="comment">/* faster, less accurate integer method */</font>
00220 JDCT_FLOAT <font class="comment">/* floating-point: accurate, fast on fast HW */</font>
00221 } J_DCT_METHOD;
00222
00223 <font class="preprocessor">#ifndef JDCT_DEFAULT </font><font class="comment">/* may be overridden in jconfig.h */</font>
<a name="l00224"></a><a class="code" href="jpeglib_h.html#a10">00224</a> <font class="preprocessor">#define JDCT_DEFAULT JDCT_ISLOW
</font>00225 <font class="preprocessor"></font><font class="preprocessor">#endif
</font>00226 <font class="preprocessor"></font><font class="preprocessor">#ifndef JDCT_FASTEST </font><font class="comment">/* may be overridden in jconfig.h */</font>
<a name="l00227"></a><a class="code" href="jpeglib_h.html#a11">00227</a> <font class="preprocessor">#define JDCT_FASTEST JDCT_IFAST
</font>00228 <font class="preprocessor"></font><font class="preprocessor">#endif
</font>00229 <font class="preprocessor"></font>
00230 <font class="comment">/* Dithering options for decompression. */</font>
00231
<a name="l00232"></a><a class="code" href="jpeglib_h.html#a67">00232</a> <font class="keyword">typedef</font> <font class="keyword">enum</font> {
00233 JDITHER_NONE, <font class="comment">/* no dithering */</font>
00234 JDITHER_ORDERED, <font class="comment">/* simple ordered dither */</font>
00235 JDITHER_FS <font class="comment">/* Floyd-Steinberg error diffusion dither */</font>
00236 } J_DITHER_MODE;
00237
00238
00239 <font class="comment">/* Common fields between JPEG compression and decompression master structs. */</font>
00240
<a name="l00241"></a><a class="code" href="jpeglib_h.html#a12">00241</a> <font class="preprocessor">#define jpeg_common_fields \
</font>00242 <font class="preprocessor"> struct jpeg_error_mgr * err; </font><font class="comment">/* Error handler module */</font>\
00243 struct jpeg_memory_mgr * mem; <font class="comment">/* Memory manager module */</font>\
00244 struct jpeg_progress_mgr * progress; <font class="comment">/* Progress monitor, or NULL if none */</font>\
00245 void * client_data; <font class="comment">/* Available for use by application */</font>\
00246 boolean is_decompressor; <font class="comment">/* So common code can tell which is which */</font>\
00247 int global_state <font class="comment">/* For checking call sequence validity */</font>
00248
00249 <font class="comment">/* Routines that are to be used by both halves of the library are declared
</font>00250 <font class="comment"> * to receive a pointer to this structure. There are no actual instances of
</font>00251 <font class="comment"> * jpeg_common_struct, only of jpeg_compress_struct and jpeg_decompress_struct.
</font>00252 <font class="comment"> */</font>
<a name="l00253"></a><a class="code" href="class_jpeg_common_struct.html">00253</a> <font class="keyword">struct </font><a class="code" href="class_jpeg_common_struct.html">jpeg_common_struct</a> {
<a name="l00254"></a><a class="code" href="class_jpeg_common_struct.html#m0">00254</a> jpeg_common_fields; <font class="comment">/* Fields common to both master struct types */</font>
00255 <font class="comment">/* Additional fields follow in an actual jpeg_compress_struct or
</font>00256 <font class="comment"> * jpeg_decompress_struct. All three structs must agree on these
</font>00257 <font class="comment"> * initial fields! (This would be a lot cleaner in C++.)
</font>00258 <font class="comment"> */</font>
00259 };
00260
<a name="l00261"></a><a class="code" href="jpeglib_h.html#a41">00261</a> <font class="keyword">typedef</font> <font class="keyword">struct </font><a class="code" href="class_jpeg_common_struct.html">jpeg_common_struct</a> * <a class="code" href="class_jpeg_common_struct.html">j_common_ptr</a>;
<a name="l00262"></a><a class="code" href="jpeglib_h.html#a42">00262</a> <font class="keyword">typedef</font> <font class="keyword">struct </font><a class="code" href="class_jpeg_compress_struct.html">jpeg_compress_struct</a> * <a class="code" href="class_jpeg_compress_struct.html">j_compress_ptr</a>;
<a name="l00263"></a><a class="code" href="jpeglib_h.html#a43">00263</a> <font class="keyword">typedef</font> <font class="keyword">struct </font><a class="code" href="class_jpeg_decompress_struct.html">jpeg_decompress_struct</a> * <a class="code" href="class_jpeg_decompress_struct.html">j_decompress_ptr</a>;
00264
00265
00266 <font class="comment">/* Master record for a compression instance */</font>
00267
<a name="l00268"></a><a class="code" href="class_jpeg_compress_struct.html">00268</a> <font class="keyword">struct </font><a class="code" href="class_jpeg_compress_struct.html">jpeg_compress_struct</a> {
<a name="l00269"></a><a class="code" href="class_jpeg_compress_struct.html#m0">00269</a> jpeg_common_fields; <font class="comment">/* Fields shared with jpeg_decompress_struct */</font>
00270
00271 <font class="comment">/* Destination for compressed data */</font>
<a name="l00272"></a><a class="code" href="class_jpeg_compress_struct.html#m1">00272</a> <font class="keyword">struct </font><a class="code" href="class_jpeg_destination_mgr.html">jpeg_destination_mgr</a> * dest;
00273
00274 <font class="comment">/* Description of source image --- these fields must be filled in by
</font>00275 <font class="comment"> * outer application before starting compression. in_color_space must
</font>00276 <font class="comment"> * be correct before you can even call jpeg_set_defaults().
</font>00277 <font class="comment"> */</font>
00278
<a name="l00279"></a><a class="code" href="class_jpeg_compress_struct.html#m2">00279</a> JDIMENSION image_width; <font class="comment">/* input image width */</font>
<a name="l00280"></a><a class="code" href="class_jpeg_compress_struct.html#m3">00280</a> JDIMENSION image_height; <font class="comment">/* input image height */</font>
<a name="l00281"></a><a class="code" href="class_jpeg_compress_struct.html#m4">00281</a> <font class="keywordtype">int</font> input_components; <font class="comment">/* # of color components in input image */</font>
<a name="l00282"></a><a class="code" href="class_jpeg_compress_struct.html#m5">00282</a> J_COLOR_SPACE in_color_space; <font class="comment">/* colorspace of input image */</font>
00283
<a name="l00284"></a><a class="code" href="class_jpeg_compress_struct.html#m6">00284</a> <font class="keywordtype">double</font> input_gamma; <font class="comment">/* image gamma of input image */</font>
00285
00286 <font class="comment">/* Compression parameters --- these fields must be set before calling
</font>00287 <font class="comment"> * jpeg_start_compress(). We recommend calling jpeg_set_defaults() to
</font>00288 <font class="comment"> * initialize everything to reasonable defaults, then changing anything
</font>00289 <font class="comment"> * the application specifically wants to change. That way you won't get
</font>00290 <font class="comment"> * burnt when new parameters are added. Also note that there are several
</font>00291 <font class="comment"> * helper routines to simplify changing parameters.
</font>00292 <font class="comment"> */</font>
00293
<a name="l00294"></a><a class="code" href="class_jpeg_compress_struct.html#m7">00294</a> <font class="keywordtype">int</font> data_precision; <font class="comment">/* bits of precision in image data */</font>
00295
<a name="l00296"></a><a class="code" href="class_jpeg_compress_struct.html#m8">00296</a> <font class="keywordtype">int</font> num_components; <font class="comment">/* # of color components in JPEG image */</font>
<a name="l00297"></a><a class="code" href="class_jpeg_compress_struct.html#m9">00297</a> J_COLOR_SPACE jpeg_color_space; <font class="comment">/* colorspace of JPEG image */</font>
00298
<a name="l00299"></a><a class="code" href="class_jpeg_compress_struct.html#m10">00299</a> <a class="code" href="class_jpeg_component_info.html">jpeg_component_info</a> * comp_info;
00300 <font class="comment">/* comp_info[i] describes component that appears i'th in SOF */</font>
00301
<a name="l00302"></a><a class="code" href="class_jpeg_compress_struct.html#m11">00302</a> <a class="code" href="class_JQUANT_TBL.html">JQUANT_TBL</a> * quant_tbl_ptrs[NUM_QUANT_TBLS];
00303 <font class="comment">/* ptrs to coefficient quantization tables, or NULL if not defined */</font>
00304
<a name="l00305"></a><a class="code" href="class_jpeg_compress_struct.html#m12">00305</a> <a class="code" href="class_JHUFF_TBL.html">JHUFF_TBL</a> * dc_huff_tbl_ptrs[NUM_HUFF_TBLS];
<a name="l00306"></a><a class="code" href="class_jpeg_compress_struct.html#m13">00306</a> <a class="code" href="class_JHUFF_TBL.html">JHUFF_TBL</a> * ac_huff_tbl_ptrs[NUM_HUFF_TBLS];
00307 <font class="comment">/* ptrs to Huffman coding tables, or NULL if not defined */</font>
00308
<a name="l00309"></a><a class="code" href="class_jpeg_compress_struct.html#m14">00309</a> UINT8 arith_dc_L[NUM_ARITH_TBLS]; <font class="comment">/* L values for DC arith-coding tables */</font>
<a name="l00310"></a><a class="code" href="class_jpeg_compress_struct.html#m15">00310</a> UINT8 arith_dc_U[NUM_ARITH_TBLS]; <font class="comment">/* U values for DC arith-coding tables */</font>
<a name="l00311"></a><a class="code" href="class_jpeg_compress_struct.html#m16">00311</a> UINT8 arith_ac_K[NUM_ARITH_TBLS]; <font class="comment">/* Kx values for AC arith-coding tables */</font>
00312
<a name="l00313"></a><a class="code" href="class_jpeg_compress_struct.html#m17">00313</a> <font class="keywordtype">int</font> num_scans; <font class="comment">/* # of entries in scan_info array */</font>
<a name="l00314"></a><a class="code" href="class_jpeg_compress_struct.html#m18">00314</a> <font class="keyword">const</font> <a class="code" href="class_jpeg_scan_info.html">jpeg_scan_info</a> * scan_info; <font class="comment">/* script for multi-scan file, or NULL */</font>
00315 <font class="comment">/* The default value of scan_info is NULL, which causes a single-scan
</font>00316 <font class="comment"> * sequential JPEG file to be emitted. To create a multi-scan file,
</font>00317 <font class="comment"> * set num_scans and scan_info to point to an array of scan definitions.
</font>00318 <font class="comment"> */</font>
00319
<a name="l00320"></a><a class="code" href="class_jpeg_compress_struct.html#m19">00320</a> boolean raw_data_in; <font class="comment">/* TRUE=caller supplies downsampled data */</font>
<a name="l00321"></a><a class="code" href="class_jpeg_compress_struct.html#m20">00321</a> boolean arith_code; <font class="comment">/* TRUE=arithmetic coding, FALSE=Huffman */</font>
<a name="l00322"></a><a class="code" href="class_jpeg_compress_struct.html#m21">00322</a> boolean optimize_coding; <font class="comment">/* TRUE=optimize entropy encoding parms */</font>
<a name="l00323"></a><a class="code" href="class_jpeg_compress_struct.html#m22">00323</a> boolean CCIR601_sampling; <font class="comment">/* TRUE=first samples are cosited */</font>
<a name="l00324"></a><a class="code" href="class_jpeg_compress_struct.html#m23">00324</a> <font class="keywordtype">int</font> smoothing_factor; <font class="comment">/* 1..100, or 0 for no input smoothing */</font>
<a name="l00325"></a><a class="code" href="class_jpeg_compress_struct.html#m24">00325</a> J_DCT_METHOD dct_method; <font class="comment">/* DCT algorithm selector */</font>
00326
00327 <font class="comment">/* The restart interval can be specified in absolute MCUs by setting
</font>00328 <font class="comment"> * restart_interval, or in MCU rows by setting restart_in_rows
</font>00329 <font class="comment"> * (in which case the correct restart_interval will be figured
</font>00330 <font class="comment"> * for each scan).
</font>00331 <font class="comment"> */</font>
<a name="l00332"></a><a class="code" href="class_jpeg_compress_struct.html#m25">00332</a> <font class="keywordtype">unsigned</font> <font class="keywordtype">int</font> restart_interval; <font class="comment">/* MCUs per restart, or 0 for no restart */</font>
<a name="l00333"></a><a class="code" href="class_jpeg_compress_struct.html#m26">00333</a> <font class="keywordtype">int</font> restart_in_rows; <font class="comment">/* if > 0, MCU rows per restart interval */</font>
00334
00335 <font class="comment">/* Parameters controlling emission of special markers. */</font>
00336
<a name="l00337"></a><a class="code" href="class_jpeg_compress_struct.html#m27">00337</a> boolean write_JFIF_header; <font class="comment">/* should a JFIF marker be written? */</font>
<a name="l00338"></a><a class="code" href="class_jpeg_compress_struct.html#m28">00338</a> UINT8 JFIF_major_version; <font class="comment">/* What to write for the JFIF version number */</font>
<a name="l00339"></a><a class="code" href="class_jpeg_compress_struct.html#m29">00339</a> UINT8 JFIF_minor_version;
00340 <font class="comment">/* These three values are not used by the JPEG code, merely copied */</font>
00341 <font class="comment">/* into the JFIF APP0 marker. density_unit can be 0 for unknown, */</font>
00342 <font class="comment">/* 1 for dots/inch, or 2 for dots/cm. Note that the pixel aspect */</font>
00343 <font class="comment">/* ratio is defined by X_density/Y_density even when density_unit=0. */</font>
<a name="l00344"></a><a class="code" href="class_jpeg_compress_struct.html#m30">00344</a> UINT8 density_unit; <font class="comment">/* JFIF code for pixel size units */</font>
<a name="l00345"></a><a class="code" href="class_jpeg_compress_struct.html#m31">00345</a> UINT16 X_density; <font class="comment">/* Horizontal pixel density */</font>
<a name="l00346"></a><a class="code" href="class_jpeg_compress_struct.html#m32">00346</a> UINT16 Y_density; <font class="comment">/* Vertical pixel density */</font>
<a name="l00347"></a><a class="code" href="class_jpeg_compress_struct.html#m33">00347</a> boolean write_Adobe_marker; <font class="comment">/* should an Adobe marker be written? */</font>
00348
00349 <font class="comment">/* State variable: index of next scanline to be written to
</font>00350 <font class="comment"> * jpeg_write_scanlines(). Application may use this to control its
</font>00351 <font class="comment"> * processing loop, e.g., "while (next_scanline < image_height)".
</font>00352 <font class="comment"> */</font>
00353
<a name="l00354"></a><a class="code" href="class_jpeg_compress_struct.html#m34">00354</a> JDIMENSION next_scanline; <font class="comment">/* 0 .. image_height-1 */</font>
00355
00356 <font class="comment">/* Remaining fields are known throughout compressor, but generally
</font>00357 <font class="comment"> * should not be touched by a surrounding application.
</font>00358 <font class="comment"> */</font>
00359
00360 <font class="comment">/*
</font>00361 <font class="comment"> * These fields are computed during compression startup
</font>00362 <font class="comment"> */</font>
<a name="l00363"></a><a class="code" href="class_jpeg_compress_struct.html#m35">00363</a> boolean progressive_mode; <font class="comment">/* TRUE if scan script uses progressive mode */</font>
<a name="l00364"></a><a class="code" href="class_jpeg_compress_struct.html#m36">00364</a> <font class="keywordtype">int</font> max_h_samp_factor; <font class="comment">/* largest h_samp_factor */</font>
<a name="l00365"></a><a class="code" href="class_jpeg_compress_struct.html#m37">00365</a> <font class="keywordtype">int</font> max_v_samp_factor; <font class="comment">/* largest v_samp_factor */</font>
00366
<a name="l00367"></a><a class="code" href="class_jpeg_compress_struct.html#m38">00367</a> JDIMENSION total_iMCU_rows; <font class="comment">/* # of iMCU rows to be input to coef ctlr */</font>
00368 <font class="comment">/* The coefficient controller receives data in units of MCU rows as defined
</font>00369 <font class="comment"> * for fully interleaved scans (whether the JPEG file is interleaved or not).
</font>00370 <font class="comment"> * There are v_samp_factor * DCTSIZE sample rows of each component in an
</font>00371 <font class="comment"> * "iMCU" (interleaved MCU) row.
</font>00372 <font class="comment"> */</font>
00373
00374 <font class="comment">/*
</font>00375 <font class="comment"> * These fields are valid during any one scan.
</font>00376 <font class="comment"> * They describe the components and MCUs actually appearing in the scan.
</font>00377 <font class="comment"> */</font>
<a name="l00378"></a><a class="code" href="class_jpeg_compress_struct.html#m39">00378</a> <font class="keywordtype">int</font> comps_in_scan; <font class="comment">/* # of JPEG components in this scan */</font>
<a name="l00379"></a><a class="code" href="class_jpeg_compress_struct.html#m40">00379</a> <a class="code" href="class_jpeg_component_info.html">jpeg_component_info</a> * cur_comp_info[MAX_COMPS_IN_SCAN];
00380 <font class="comment">/* *cur_comp_info[i] describes component that appears i'th in SOS */</font>
00381
<a name="l00382"></a><a class="code" href="class_jpeg_compress_struct.html#m41">00382</a> JDIMENSION MCUs_per_row; <font class="comment">/* # of MCUs across the image */</font>
<a name="l00383"></a><a class="code" href="class_jpeg_compress_struct.html#m42">00383</a> JDIMENSION MCU_rows_in_scan; <font class="comment">/* # of MCU rows in the image */</font>
00384
<a name="l00385"></a><a class="code" href="class_jpeg_compress_struct.html#m43">00385</a> <font class="keywordtype">int</font> blocks_in_MCU; <font class="comment">/* # of DCT blocks per MCU */</font>
<a name="l00386"></a><a class="code" href="class_jpeg_compress_struct.html#m44">00386</a> <font class="keywordtype">int</font> MCU_membership[C_MAX_BLOCKS_IN_MCU];
00387 <font class="comment">/* MCU_membership[i] is index in cur_comp_info of component owning */</font>
00388 <font class="comment">/* i'th block in an MCU */</font>
00389
<a name="l00390"></a><a class="code" href="class_jpeg_compress_struct.html#m45">00390</a> <font class="keywordtype">int</font> Ss, Se, Ah, Al; <font class="comment">/* progressive JPEG parameters for scan */</font>
00391
00392 <font class="comment">/*
</font>00393 <font class="comment"> * Links to compression subobjects (methods and private variables of modules)
</font>00394 <font class="comment"> */</font>
<a name="l00395"></a><a class="code" href="class_jpeg_compress_struct.html#m49">00395</a> <font class="keyword">struct </font><a class="code" href="class_jpeg_comp_master.html">jpeg_comp_master</a> * master;
<a name="l00396"></a><a class="code" href="class_jpeg_compress_struct.html#m50">00396</a> <font class="keyword">struct </font><a class="code" href="class_jpeg_c_main_controller.html">jpeg_c_main_controller</a> * main;
<a name="l00397"></a><a class="code" href="class_jpeg_compress_struct.html#m51">00397</a> <font class="keyword">struct </font><a class="code" href="class_jpeg_c_prep_controller.html">jpeg_c_prep_controller</a> * prep;
<a name="l00398"></a><a class="code" href="class_jpeg_compress_struct.html#m52">00398</a> <font class="keyword">struct </font><a class="code" href="class_jpeg_c_coef_controller.html">jpeg_c_coef_controller</a> * coef;
<a name="l00399"></a><a class="code" href="class_jpeg_compress_struct.html#m53">00399</a> <font class="keyword">struct </font><a class="code" href="class_jpeg_marker_writer.html">jpeg_marker_writer</a> * marker;
<a name="l00400"></a><a class="code" href="class_jpeg_compress_struct.html#m54">00400</a> <font class="keyword">struct </font><a class="code" href="class_jpeg_color_converter.html">jpeg_color_converter</a> * cconvert;
<a name="l00401"></a><a class="code" href="class_jpeg_compress_struct.html#m55">00401</a> <font class="keyword">struct </font><a class="code" href="class_jpeg_downsampler.html">jpeg_downsampler</a> * downsample;
<a name="l00402"></a><a class="code" href="class_jpeg_compress_struct.html#m56">00402</a> <font class="keyword">struct </font><a class="code" href="class_jpeg_forward_dct.html">jpeg_forward_dct</a> * fdct;
<a name="l00403"></a><a class="code" href="class_jpeg_compress_struct.html#m57">00403</a> <font class="keyword">struct </font><a class="code" href="class_jpeg_entropy_encoder.html">jpeg_entropy_encoder</a> * entropy;
<a name="l00404"></a><a class="code" href="class_jpeg_compress_struct.html#m58">00404</a> <a class="code" href="class_jpeg_scan_info.html">jpeg_scan_info</a> * script_space; <font class="comment">/* workspace for jpeg_simple_progression */</font>
<a name="l00405"></a><a class="code" href="class_jpeg_compress_struct.html#m59">00405</a> <font class="keywordtype">int</font> script_space_size;
00406 };
00407
00408
00409 <font class="comment">/* Master record for a decompression instance */</font>
00410
<a name="l00411"></a><a class="code" href="class_jpeg_decompress_struct.html">00411</a> <font class="keyword">struct </font><a class="code" href="class_jpeg_decompress_struct.html">jpeg_decompress_struct</a> {
<a name="l00412"></a><a class="code" href="class_jpeg_decompress_struct.html#m0">00412</a> jpeg_common_fields; <font class="comment">/* Fields shared with jpeg_compress_struct */</font>
00413
00414 <font class="comment">/* Source of compressed data */</font>
<a name="l00415"></a><a class="code" href="class_jpeg_decompress_struct.html#m1">00415</a> <font class="keyword">struct </font><a class="code" href="class_jpeg_source_mgr.html">jpeg_source_mgr</a> * src;
00416
00417 <font class="comment">/* Basic description of image --- filled in by jpeg_read_header(). */</font>
00418 <font class="comment">/* Application may inspect these values to decide how to process image. */</font>
00419
<a name="l00420"></a><a class="code" href="class_jpeg_decompress_struct.html#m2">00420</a> JDIMENSION image_width; <font class="comment">/* nominal image width (from SOF marker) */</font>
<a name="l00421"></a><a class="code" href="class_jpeg_decompress_struct.html#m3">00421</a> JDIMENSION image_height; <font class="comment">/* nominal image height */</font>
<a name="l00422"></a><a class="code" href="class_jpeg_decompress_struct.html#m4">00422</a> <font class="keywordtype">int</font> num_components; <font class="comment">/* # of color components in JPEG image */</font>
<a name="l00423"></a><a class="code" href="class_jpeg_decompress_struct.html#m5">00423</a> J_COLOR_SPACE jpeg_color_space; <font class="comment">/* colorspace of JPEG image */</font>
00424
00425 <font class="comment">/* Decompression processing parameters --- these fields must be set before
</font>00426 <font class="comment"> * calling jpeg_start_decompress(). Note that jpeg_read_header() initializes
</font>00427 <font class="comment"> * them to default values.
</font>00428 <font class="comment"> */</font>
00429
<a name="l00430"></a><a class="code" href="class_jpeg_decompress_struct.html#m6">00430</a> J_COLOR_SPACE out_color_space; <font class="comment">/* colorspace for output */</font>
00431
<a name="l00432"></a><a class="code" href="class_jpeg_decompress_struct.html#m7">00432</a> <font class="keywordtype">unsigned</font> <font class="keywordtype">int</font> scale_num, scale_denom; <font class="comment">/* fraction by which to scale image */</font>
00433
<a name="l00434"></a><a class="code" href="class_jpeg_decompress_struct.html#m9">00434</a> <font class="keywordtype">double</font> output_gamma; <font class="comment">/* image gamma wanted in output */</font>
00435
<a name="l00436"></a><a class="code" href="class_jpeg_decompress_struct.html#m10">00436</a> boolean buffered_image; <font class="comment">/* TRUE=multiple output passes */</font>
<a name="l00437"></a><a class="code" href="class_jpeg_decompress_struct.html#m11">00437</a> boolean raw_data_out; <font class="comment">/* TRUE=downsampled data wanted */</font>
00438
<a name="l00439"></a><a class="code" href="class_jpeg_decompress_struct.html#m12">00439</a> J_DCT_METHOD dct_method; <font class="comment">/* IDCT algorithm selector */</font>
<a name="l00440"></a><a class="code" href="class_jpeg_decompress_struct.html#m13">00440</a> boolean do_fancy_upsampling; <font class="comment">/* TRUE=apply fancy upsampling */</font>
<a name="l00441"></a><a class="code" href="class_jpeg_decompress_struct.html#m14">00441</a> boolean do_block_smoothing; <font class="comment">/* TRUE=apply interblock smoothing */</font>
00442
<a name="l00443"></a><a class="code" href="class_jpeg_decompress_struct.html#m15">00443</a> boolean quantize_colors; <font class="comment">/* TRUE=colormapped output wanted */</font>
00444 <font class="comment">/* the following are ignored if not quantize_colors: */</font>
<a name="l00445"></a><a class="code" href="class_jpeg_decompress_struct.html#m16">00445</a> J_DITHER_MODE dither_mode; <font class="comment">/* type of color dithering to use */</font>
<a name="l00446"></a><a class="code" href="class_jpeg_decompress_struct.html#m17">00446</a> boolean two_pass_quantize; <font class="comment">/* TRUE=use two-pass color quantization */</font>
<a name="l00447"></a><a class="code" href="class_jpeg_decompress_struct.html#m18">00447</a> <font class="keywordtype">int</font> desired_number_of_colors; <font class="comment">/* max # colors to use in created colormap */</font>
00448 <font class="comment">/* these are significant only in buffered-image mode: */</font>
<a name="l00449"></a><a class="code" href="class_jpeg_decompress_struct.html#m19">00449</a> boolean enable_1pass_quant; <font class="comment">/* enable future use of 1-pass quantizer */</font>
<a name="l00450"></a><a class="code" href="class_jpeg_decompress_struct.html#m20">00450</a> boolean enable_external_quant;<font class="comment">/* enable future use of external colormap */</font>
<a name="l00451"></a><a class="code" href="class_jpeg_decompress_struct.html#m21">00451</a> boolean enable_2pass_quant; <font class="comment">/* enable future use of 2-pass quantizer */</font>
00452
00453 <font class="comment">/* Description of actual output image that will be returned to application.
</font>00454 <font class="comment"> * These fields are computed by jpeg_start_decompress().
</font>00455 <font class="comment"> * You can also use jpeg_calc_output_dimensions() to determine these values
</font>00456 <font class="comment"> * in advance of calling jpeg_start_decompress().
</font>00457 <font class="comment"> */</font>
00458
<a name="l00459"></a><a class="code" href="class_jpeg_decompress_struct.html#m22">00459</a> JDIMENSION output_width; <font class="comment">/* scaled image width */</font>
<a name="l00460"></a><a class="code" href="class_jpeg_decompress_struct.html#m23">00460</a> JDIMENSION output_height; <font class="comment">/* scaled image height */</font>
<a name="l00461"></a><a class="code" href="class_jpeg_decompress_struct.html#m24">00461</a> <font class="keywordtype">int</font> out_color_components; <font class="comment">/* # of color components in out_color_space */</font>
<a name="l00462"></a><a class="code" href="class_jpeg_decompress_struct.html#m25">00462</a> <font class="keywordtype">int</font> output_components; <font class="comment">/* # of color components returned */</font>
00463 <font class="comment">/* output_components is 1 (a colormap index) when quantizing colors;
</font>00464 <font class="comment"> * otherwise it equals out_color_components.
</font>00465 <font class="comment"> */</font>
<a name="l00466"></a><a class="code" href="class_jpeg_decompress_struct.html#m26">00466</a> <font class="keywordtype">int</font> rec_outbuf_height; <font class="comment">/* min recommended height of scanline buffer */</font>
00467 <font class="comment">/* If the buffer passed to jpeg_read_scanlines() is less than this many rows
</font>00468 <font class="comment"> * high, space and time will be wasted due to unnecessary data copying.
</font>00469 <font class="comment"> * Usually rec_outbuf_height will be 1 or 2, at most 4.
</font>00470 <font class="comment"> */</font>
00471
00472 <font class="comment">/* When quantizing colors, the output colormap is described by these fields.
</font>00473 <font class="comment"> * The application can supply a colormap by setting colormap non-NULL before
</font>00474 <font class="comment"> * calling jpeg_start_decompress; otherwise a colormap is created during
</font>00475 <font class="comment"> * jpeg_start_decompress or jpeg_start_output.
</font>00476 <font class="comment"> * The map has out_color_components rows and actual_number_of_colors columns.
</font>00477 <font class="comment"> */</font>
<a name="l00478"></a><a class="code" href="class_jpeg_decompress_struct.html#m27">00478</a> <font class="keywordtype">int</font> actual_number_of_colors; <font class="comment">/* number of entries in use */</font>
<a name="l00479"></a><a class="code" href="class_jpeg_decompress_struct.html#m28">00479</a> JSAMPARRAY colormap; <font class="comment">/* The color map as a 2-D pixel array */</font>
00480
00481 <font class="comment">/* State variables: these variables indicate the progress of decompression.
</font>00482 <font class="comment"> * The application may examine these but must not modify them.
</font>00483 <font class="comment"> */</font>
00484
00485 <font class="comment">/* Row index of next scanline to be read from jpeg_read_scanlines().
</font>00486 <font class="comment"> * Application may use this to control its processing loop, e.g.,
</font>00487 <font class="comment"> * "while (output_scanline < output_height)".
</font>00488 <font class="comment"> */</font>
<a name="l00489"></a><a class="code" href="class_jpeg_decompress_struct.html#m29">00489</a> JDIMENSION output_scanline; <font class="comment">/* 0 .. output_height-1 */</font>
00490
00491 <font class="comment">/* Current input scan number and number of iMCU rows completed in scan.
</font>00492 <font class="comment"> * These indicate the progress of the decompressor input side.
</font>00493 <font class="comment"> */</font>
<a name="l00494"></a><a class="code" href="class_jpeg_decompress_struct.html#m30">00494</a> <font class="keywordtype">int</font> input_scan_number; <font class="comment">/* Number of SOS markers seen so far */</font>
<a name="l00495"></a><a class="code" href="class_jpeg_decompress_struct.html#m31">00495</a> JDIMENSION input_iMCU_row; <font class="comment">/* Number of iMCU rows completed */</font>
00496
00497 <font class="comment">/* The "output scan number" is the notional scan being displayed by the
</font>00498 <font class="comment"> * output side. The decompressor will not allow output scan/row number
</font>00499 <font class="comment"> * to get ahead of input scan/row, but it can fall arbitrarily far behind.
</font>00500 <font class="comment"> */</font>
<a name="l00501"></a><a class="code" href="class_jpeg_decompress_struct.html#m32">00501</a> <font class="keywordtype">int</font> output_scan_number; <font class="comment">/* Nominal scan number being displayed */</font>
<a name="l00502"></a><a class="code" href="class_jpeg_decompress_struct.html#m33">00502</a> JDIMENSION output_iMCU_row; <font class="comment">/* Number of iMCU rows read */</font>
00503
00504 <font class="comment">/* Current progression status. coef_bits[c][i] indicates the precision
</font>00505 <font class="comment"> * with which component c's DCT coefficient i (in zigzag order) is known.
</font>00506 <font class="comment"> * It is -1 when no data has yet been received, otherwise it is the point
</font>00507 <font class="comment"> * transform (shift) value for the most recent scan of the coefficient
</font>00508 <font class="comment"> * (thus, 0 at completion of the progression).
</font>00509 <font class="comment"> * This pointer is NULL when reading a non-progressive file.
</font>00510 <font class="comment"> */</font>
<a name="l00511"></a><a class="code" href="class_jpeg_decompress_struct.html#m34">00511</a> int (*coef_bits)[DCTSIZE2]; <font class="comment">/* -1 or current Al value for each coef */</font>
00512
00513 <font class="comment">/* Internal JPEG parameters --- the application usually need not look at
</font>00514 <font class="comment"> * these fields. Note that the decompressor output side may not use
</font>00515 <font class="comment"> * any parameters that can change between scans.
</font>00516 <font class="comment"> */</font>
00517
00518 <font class="comment">/* Quantization and Huffman tables are carried forward across input
</font>00519 <font class="comment"> * datastreams when processing abbreviated JPEG datastreams.
</font>00520 <font class="comment"> */</font>
00521
<a name="l00522"></a><a class="code" href="class_jpeg_decompress_struct.html#m35">00522</a> <a class="code" href="class_JQUANT_TBL.html">JQUANT_TBL</a> * quant_tbl_ptrs[NUM_QUANT_TBLS];
00523 <font class="comment">/* ptrs to coefficient quantization tables, or NULL if not defined */</font>
00524
<a name="l00525"></a><a class="code" href="class_jpeg_decompress_struct.html#m36">00525</a> <a class="code" href="class_JHUFF_TBL.html">JHUFF_TBL</a> * dc_huff_tbl_ptrs[NUM_HUFF_TBLS];
<a name="l00526"></a><a class="code" href="class_jpeg_decompress_struct.html#m37">00526</a> <a class="code" href="class_JHUFF_TBL.html">JHUFF_TBL</a> * ac_huff_tbl_ptrs[NUM_HUFF_TBLS];
00527 <font class="comment">/* ptrs to Huffman coding tables, or NULL if not defined */</font>
00528
00529 <font class="comment">/* These parameters are never carried across datastreams, since they
</font>00530 <font class="comment"> * are given in SOF/SOS markers or defined to be reset by SOI.
</font>00531 <font class="comment"> */</font>
00532
<a name="l00533"></a><a class="code" href="class_jpeg_decompress_struct.html#m38">00533</a> <font class="keywordtype">int</font> data_precision; <font class="comment">/* bits of precision in image data */</font>
00534
<a name="l00535"></a><a class="code" href="class_jpeg_decompress_struct.html#m39">00535</a> <a class="code" href="class_jpeg_component_info.html">jpeg_component_info</a> * comp_info;
00536 <font class="comment">/* comp_info[i] describes component that appears i'th in SOF */</font>
00537
<a name="l00538"></a><a class="code" href="class_jpeg_decompress_struct.html#m40">00538</a> boolean progressive_mode; <font class="comment">/* TRUE if SOFn specifies progressive mode */</font>
<a name="l00539"></a><a class="code" href="class_jpeg_decompress_struct.html#m41">00539</a> boolean arith_code; <font class="comment">/* TRUE=arithmetic coding, FALSE=Huffman */</font>
00540
<a name="l00541"></a><a class="code" href="class_jpeg_decompress_struct.html#m42">00541</a> UINT8 arith_dc_L[NUM_ARITH_TBLS]; <font class="comment">/* L values for DC arith-coding tables */</font>
<a name="l00542"></a><a class="code" href="class_jpeg_decompress_struct.html#m43">00542</a> UINT8 arith_dc_U[NUM_ARITH_TBLS]; <font class="comment">/* U values for DC arith-coding tables */</font>
<a name="l00543"></a><a class="code" href="class_jpeg_decompress_struct.html#m44">00543</a> UINT8 arith_ac_K[NUM_ARITH_TBLS]; <font class="comment">/* Kx values for AC arith-coding tables */</font>
00544
<a name="l00545"></a><a class="code" href="class_jpeg_decompress_struct.html#m45">00545</a> <font class="keywordtype">unsigned</font> <font class="keywordtype">int</font> restart_interval; <font class="comment">/* MCUs per restart interval, or 0 for no restart */</font>
00546
00547 <font class="comment">/* These fields record data obtained from optional markers recognized by
</font>00548 <font class="comment"> * the JPEG library.
</font>00549 <font class="comment"> */</font>
<a name="l00550"></a><a class="code" href="class_jpeg_decompress_struct.html#m46">00550</a> boolean saw_JFIF_marker; <font class="comment">/* TRUE iff a JFIF APP0 marker was found */</font>
00551 <font class="comment">/* Data copied from JFIF marker; only valid if saw_JFIF_marker is TRUE: */</font>
<a name="l00552"></a><a class="code" href="class_jpeg_decompress_struct.html#m47">00552</a> UINT8 JFIF_major_version; <font class="comment">/* JFIF version number */</font>
<a name="l00553"></a><a class="code" href="class_jpeg_decompress_struct.html#m48">00553</a> UINT8 JFIF_minor_version;
<a name="l00554"></a><a class="code" href="class_jpeg_decompress_struct.html#m49">00554</a> UINT8 density_unit; <font class="comment">/* JFIF code for pixel size units */</font>
<a name="l00555"></a><a class="code" href="class_jpeg_decompress_struct.html#m50">00555</a> UINT16 X_density; <font class="comment">/* Horizontal pixel density */</font>
<a name="l00556"></a><a class="code" href="class_jpeg_decompress_struct.html#m51">00556</a> UINT16 Y_density; <font class="comment">/* Vertical pixel density */</font>
<a name="l00557"></a><a class="code" href="class_jpeg_decompress_struct.html#m52">00557</a> boolean saw_Adobe_marker; <font class="comment">/* TRUE iff an Adobe APP14 marker was found */</font>
<a name="l00558"></a><a class="code" href="class_jpeg_decompress_struct.html#m53">00558</a> UINT8 Adobe_transform; <font class="comment">/* Color transform code from Adobe marker */</font>
00559
<a name="l00560"></a><a class="code" href="class_jpeg_decompress_struct.html#m54">00560</a> boolean CCIR601_sampling; <font class="comment">/* TRUE=first samples are cosited */</font>
00561
00562 <font class="comment">/* Aside from the specific data retained from APPn markers known to the
</font>00563 <font class="comment"> * library, the uninterpreted contents of any or all APPn and COM markers
</font>00564 <font class="comment"> * can be saved in a list for examination by the application.
</font>00565 <font class="comment"> */</font>
<a name="l00566"></a><a class="code" href="class_jpeg_decompress_struct.html#m55">00566</a> <a class="code" href="class_jpeg_marker_struct.html">jpeg_saved_marker_ptr</a> marker_list; <font class="comment">/* Head of list of saved markers */</font>
00567
00568 <font class="comment">/* Remaining fields are known throughout decompressor, but generally
</font>00569 <font class="comment"> * should not be touched by a surrounding application.
</font>00570 <font class="comment"> */</font>
00571
00572 <font class="comment">/*
</font>00573 <font class="comment"> * These fields are computed during decompression startup
</font>00574 <font class="comment"> */</font>
<a name="l00575"></a><a class="code" href="class_jpeg_decompress_struct.html#m56">00575</a> <font class="keywordtype">int</font> max_h_samp_factor; <font class="comment">/* largest h_samp_factor */</font>
<a name="l00576"></a><a class="code" href="class_jpeg_decompress_struct.html#m57">00576</a> <font class="keywordtype">int</font> max_v_samp_factor; <font class="comment">/* largest v_samp_factor */</font>
00577
<a name="l00578"></a><a class="code" href="class_jpeg_decompress_struct.html#m58">00578</a> <font class="keywordtype">int</font> min_DCT_scaled_size; <font class="comment">/* smallest DCT_scaled_size of any component */</font>
00579
<a name="l00580"></a><a class="code" href="class_jpeg_decompress_struct.html#m59">00580</a> JDIMENSION total_iMCU_rows; <font class="comment">/* # of iMCU rows in image */</font>
00581 <font class="comment">/* The coefficient controller's input and output progress is measured in
</font>00582 <font class="comment"> * units of "iMCU" (interleaved MCU) rows. These are the same as MCU rows
</font>00583 <font class="comment"> * in fully interleaved JPEG scans, but are used whether the scan is
</font>00584 <font class="comment"> * interleaved or not. We define an iMCU row as v_samp_factor DCT block
</font>00585 <font class="comment"> * rows of each component. Therefore, the IDCT output contains
</font>00586 <font class="comment"> * v_samp_factor*DCT_scaled_size sample rows of a component per iMCU row.
</font>00587 <font class="comment"> */</font>
00588
<a name="l00589"></a><a class="code" href="class_jpeg_decompress_struct.html#m60">00589</a> JSAMPLE * sample_range_limit; <font class="comment">/* table for fast range-limiting */</font>
00590
00591 <font class="comment">/*
</font>00592 <font class="comment"> * These fields are valid during any one scan.
</font>00593 <font class="comment"> * They describe the components and MCUs actually appearing in the scan.
</font>00594 <font class="comment"> * Note that the decompressor output side must not use these fields.
</font>00595 <font class="comment"> */</font>
<a name="l00596"></a><a class="code" href="class_jpeg_decompress_struct.html#m61">00596</a> <font class="keywordtype">int</font> comps_in_scan; <font class="comment">/* # of JPEG components in this scan */</font>
<a name="l00597"></a><a class="code" href="class_jpeg_decompress_struct.html#m62">00597</a> <a class="code" href="class_jpeg_component_info.html">jpeg_component_info</a> * cur_comp_info[MAX_COMPS_IN_SCAN];
00598 <font class="comment">/* *cur_comp_info[i] describes component that appears i'th in SOS */</font>
00599
<a name="l00600"></a><a class="code" href="class_jpeg_decompress_struct.html#m63">00600</a> JDIMENSION MCUs_per_row; <font class="comment">/* # of MCUs across the image */</font>
<a name="l00601"></a><a class="code" href="class_jpeg_decompress_struct.html#m64">00601</a> JDIMENSION MCU_rows_in_scan; <font class="comment">/* # of MCU rows in the image */</font>
00602
<a name="l00603"></a><a class="code" href="class_jpeg_decompress_struct.html#m65">00603</a> <font class="keywordtype">int</font> blocks_in_MCU; <font class="comment">/* # of DCT blocks per MCU */</font>
<a name="l00604"></a><a class="code" href="class_jpeg_decompress_struct.html#m66">00604</a> <font class="keywordtype">int</font> MCU_membership[D_MAX_BLOCKS_IN_MCU];
00605 <font class="comment">/* MCU_membership[i] is index in cur_comp_info of component owning */</font>
00606 <font class="comment">/* i'th block in an MCU */</font>
00607
<a name="l00608"></a><a class="code" href="class_jpeg_decompress_struct.html#m67">00608</a> <font class="keywordtype">int</font> Ss, Se, Ah, Al; <font class="comment">/* progressive JPEG parameters for scan */</font>
00609
00610 <font class="comment">/* This field is shared between entropy decoder and marker parser.
</font>00611 <font class="comment"> * It is either zero or the code of a JPEG marker that has been
</font>00612 <font class="comment"> * read from the data source, but has not yet been processed.
</font>00613 <font class="comment"> */</font>
<a name="l00614"></a><a class="code" href="class_jpeg_decompress_struct.html#m71">00614</a> <font class="keywordtype">int</font> unread_marker;
00615
00616 <font class="comment">/*
</font>00617 <font class="comment"> * Links to decompression subobjects (methods, private variables of modules)
</font>00618 <font class="comment"> */</font>
<a name="l00619"></a><a class="code" href="class_jpeg_decompress_struct.html#m72">00619</a> <font class="keyword">struct </font><a class="code" href="class_jpeg_decomp_master.html">jpeg_decomp_master</a> * master;
<a name="l00620"></a><a class="code" href="class_jpeg_decompress_struct.html#m73">00620</a> <font class="keyword">struct </font><a class="code" href="class_jpeg_d_main_controller.html">jpeg_d_main_controller</a> * main;
<a name="l00621"></a><a class="code" href="class_jpeg_decompress_struct.html#m74">00621</a> <font class="keyword">struct </font><a class="code" href="class_jpeg_d_coef_controller.html">jpeg_d_coef_controller</a> * coef;
<a name="l00622"></a><a class="code" href="class_jpeg_decompress_struct.html#m75">00622</a> <font class="keyword">struct </font><a class="code" href="class_jpeg_d_post_controller.html">jpeg_d_post_controller</a> * post;
<a name="l00623"></a><a class="code" href="class_jpeg_decompress_struct.html#m76">00623</a> <font class="keyword">struct </font><a class="code" href="class_jpeg_input_controller.html">jpeg_input_controller</a> * inputctl;
<a name="l00624"></a><a class="code" href="class_jpeg_decompress_struct.html#m77">00624</a> <font class="keyword">struct </font><a class="code" href="class_jpeg_marker_reader.html">jpeg_marker_reader</a> * marker;
<a name="l00625"></a><a class="code" href="class_jpeg_decompress_struct.html#m78">00625</a> <font class="keyword">struct </font><a class="code" href="class_jpeg_entropy_decoder.html">jpeg_entropy_decoder</a> * entropy;
<a name="l00626"></a><a class="code" href="class_jpeg_decompress_struct.html#m79">00626</a> <font class="keyword">struct </font><a class="code" href="class_jpeg_inverse_dct.html">jpeg_inverse_dct</a> * idct;
<a name="l00627"></a><a class="code" href="class_jpeg_decompress_struct.html#m80">00627</a> <font class="keyword">struct </font><a class="code" href="class_jpeg_upsampler.html">jpeg_upsampler</a> * upsample;
<a name="l00628"></a><a class="code" href="class_jpeg_decompress_struct.html#m81">00628</a> <font class="keyword">struct </font><a class="code" href="class_jpeg_color_deconverter.html">jpeg_color_deconverter</a> * cconvert;
<a name="l00629"></a><a class="code" href="class_jpeg_decompress_struct.html#m82">00629</a> <font class="keyword">struct </font><a class="code" href="class_jpeg_color_quantizer.html">jpeg_color_quantizer</a> * cquantize;
00630 };
00631
00632
00633 <font class="comment">/* "Object" declarations for JPEG modules that may be supplied or called
</font>00634 <font class="comment"> * directly by the surrounding application.
</font>00635 <font class="comment"> * As with all objects in the JPEG library, these structs only define the
</font>00636 <font class="comment"> * publicly visible methods and state variables of a module. Additional
</font>00637 <font class="comment"> * private fields may exist after the public ones.
</font>00638 <font class="comment"> */</font>
00639
00640
00641 <font class="comment">/* Error handler object */</font>
00642
<a name="l00643"></a><a class="code" href="class_jpeg_error_mgr.html">00643</a> <font class="keyword">struct </font><a class="code" href="class_jpeg_error_mgr.html">jpeg_error_mgr</a> {
00644 <font class="comment">/* Error exit handler: does not return to caller */</font>
00645 <a class="code" href="class_jpeg_error_mgr.html#a0">JMETHOD</a>(<font class="keywordtype">void</font>, error_exit, (<a class="code" href="class_jpeg_common_struct.html">j_common_ptr</a> cinfo));
00646 <font class="comment">/* Conditionally emit a trace or warning message */</font>
00647 <a class="code" href="class_jpeg_error_mgr.html#a0">JMETHOD</a>(<font class="keywordtype">void</font>, emit_message, (<a class="code" href="class_jpeg_common_struct.html">j_common_ptr</a> cinfo, <font class="keywordtype">int</font> msg_level));
00648 <font class="comment">/* Routine that actually outputs a trace or error message */</font>
00649 <a class="code" href="class_jpeg_error_mgr.html#a0">JMETHOD</a>(<font class="keywordtype">void</font>, output_message, (<a class="code" href="class_jpeg_common_struct.html">j_common_ptr</a> cinfo));
00650 <font class="comment">/* Format a message string for the most recent JPEG error or message */</font>
00651 <a class="code" href="class_jpeg_error_mgr.html#a0">JMETHOD</a>(<font class="keywordtype">void</font>, format_message, (<a class="code" href="class_jpeg_common_struct.html">j_common_ptr</a> cinfo, <font class="keywordtype">char</font> * buffer));
<a name="l00652"></a><a class="code" href="jpeglib_h.html#a13">00652</a> <font class="preprocessor">#define JMSG_LENGTH_MAX 200 </font><font class="comment">/* recommended size of format_message buffer */</font>
00653 <font class="comment">/* Reset error state variables at start of a new image */</font>
00654 <a class="code" href="class_jpeg_error_mgr.html#a0">JMETHOD</a>(<font class="keywordtype">void</font>, reset_error_mgr, (<a class="code" href="class_jpeg_common_struct.html">j_common_ptr</a> cinfo));
00655
00656 <font class="comment">/* The message ID code and any parameters are saved here.
</font>00657 <font class="comment"> * A message can have one string parameter or up to 8 int parameters.
</font>00658 <font class="comment"> */</font>
<a name="l00659"></a><a class="code" href="class_jpeg_error_mgr.html#m0">00659</a> <font class="keywordtype">int</font> msg_code;
<a name="l00660"></a><a class="code" href="jpeglib_h.html#a14">00660</a> <font class="preprocessor">#define JMSG_STR_PARM_MAX 80
</font>00661 <font class="preprocessor"></font> <font class="keyword">union </font>{
<a name="l00662"></a><a class="code" href="class_jpeg_error_mgr.html#m1">00662</a> <font class="keywordtype">int</font> i[8];
<a name="l00663"></a><a class="code" href="class_jpeg_error_mgr.html#m2">00663</a> <font class="keywordtype">char</font> s[JMSG_STR_PARM_MAX];
00664 } msg_parm;
00665
00666 <font class="comment">/* Standard state variables for error facility */</font>
00667
<a name="l00668"></a><a class="code" href="class_jpeg_error_mgr.html#m4">00668</a> <font class="keywordtype">int</font> trace_level; <font class="comment">/* max msg_level that will be displayed */</font>
00669
00670 <font class="comment">/* For recoverable corrupt-data errors, we emit a warning message,
</font>00671 <font class="comment"> * but keep going unless emit_message chooses to abort. emit_message
</font>00672 <font class="comment"> * should count warnings in num_warnings. The surrounding application
</font>00673 <font class="comment"> * can check for bad data by seeing if num_warnings is nonzero at the
</font>00674 <font class="comment"> * end of processing.
</font>00675 <font class="comment"> */</font>
<a name="l00676"></a><a class="code" href="class_jpeg_error_mgr.html#m5">00676</a> <font class="keywordtype">long</font> num_warnings; <font class="comment">/* number of corrupt-data warnings */</font>
00677
00678 <font class="comment">/* These fields point to the table(s) of error message strings.
</font>00679 <font class="comment"> * An application can change the table pointer to switch to a different
</font>00680 <font class="comment"> * message list (typically, to change the language in which errors are
</font>00681 <font class="comment"> * reported). Some applications may wish to add additional error codes
</font>00682 <font class="comment"> * that will be handled by the JPEG library error mechanism; the second
</font>00683 <font class="comment"> * table pointer is used for this purpose.
</font>00684 <font class="comment"> *
</font>00685 <font class="comment"> * First table includes all errors generated by JPEG library itself.
</font>00686 <font class="comment"> * Error code 0 is reserved for a "no such error string" message.
</font>00687 <font class="comment"> */</font>
<a name="l00688"></a><a class="code" href="class_jpeg_error_mgr.html#m6">00688</a> <font class="keyword">const</font> <font class="keywordtype">char</font> * <font class="keyword">const</font> * jpeg_message_table; <font class="comment">/* Library errors */</font>
<a name="l00689"></a><a class="code" href="class_jpeg_error_mgr.html#m7">00689</a> <font class="keywordtype">int</font> last_jpeg_message; <font class="comment">/* Table contains strings 0..last_jpeg_message */</font>
00690 <font class="comment">/* Second table can be added by application (see cjpeg/djpeg for example).
</font>00691 <font class="comment"> * It contains strings numbered first_addon_message..last_addon_message.
</font>00692 <font class="comment"> */</font>
<a name="l00693"></a><a class="code" href="class_jpeg_error_mgr.html#m8">00693</a> <font class="keyword">const</font> <font class="keywordtype">char</font> * <font class="keyword">const</font> * addon_message_table; <font class="comment">/* Non-library errors */</font>
<a name="l00694"></a><a class="code" href="class_jpeg_error_mgr.html#m9">00694</a> <font class="keywordtype">int</font> first_addon_message; <font class="comment">/* code for first string in addon table */</font>
<a name="l00695"></a><a class="code" href="class_jpeg_error_mgr.html#m10">00695</a> <font class="keywordtype">int</font> last_addon_message; <font class="comment">/* code for last string in addon table */</font>
00696 };
00697
00698
00699 <font class="comment">/* Progress monitor object */</font>
00700
<a name="l00701"></a><a class="code" href="class_jpeg_progress_mgr.html">00701</a> <font class="keyword">struct </font><a class="code" href="class_jpeg_progress_mgr.html">jpeg_progress_mgr</a> {
00702 <a class="code" href="class_jpeg_progress_mgr.html#a0">JMETHOD</a>(<font class="keywordtype">void</font>, progress_monitor, (<a class="code" href="class_jpeg_common_struct.html">j_common_ptr</a> cinfo));
00703
<a name="l00704"></a><a class="code" href="class_jpeg_progress_mgr.html#m0">00704</a> <font class="keywordtype">long</font> pass_counter; <font class="comment">/* work units completed in this pass */</font>
<a name="l00705"></a><a class="code" href="class_jpeg_progress_mgr.html#m1">00705</a> <font class="keywordtype">long</font> pass_limit; <font class="comment">/* total number of work units in this pass */</font>
<a name="l00706"></a><a class="code" href="class_jpeg_progress_mgr.html#m2">00706</a> <font class="keywordtype">int</font> completed_passes; <font class="comment">/* passes completed so far */</font>
<a name="l00707"></a><a class="code" href="class_jpeg_progress_mgr.html#m3">00707</a> <font class="keywordtype">int</font> total_passes; <font class="comment">/* total number of passes expected */</font>
00708 };
00709
00710
00711 <font class="comment">/* Data destination object for compression */</font>
00712
<a name="l00713"></a><a class="code" href="class_jpeg_destination_mgr.html">00713</a> <font class="keyword">struct </font><a class="code" href="class_jpeg_destination_mgr.html">jpeg_destination_mgr</a> {
<a name="l00714"></a><a class="code" href="class_jpeg_destination_mgr.html#m0">00714</a> JOCTET * next_output_byte; <font class="comment">/* => next byte to write in buffer */</font>
<a name="l00715"></a><a class="code" href="class_jpeg_destination_mgr.html#m1">00715</a> size_t free_in_buffer; <font class="comment">/* # of byte spaces remaining in buffer */</font>
00716
00717 <a class="code" href="class_jpeg_destination_mgr.html#a0">JMETHOD</a>(<font class="keywordtype">void</font>, init_destination, (<a class="code" href="class_jpeg_compress_struct.html">j_compress_ptr</a> cinfo));
00718 <a class="code" href="class_jpeg_destination_mgr.html#a0">JMETHOD</a>(boolean, empty_output_buffer, (<a class="code" href="class_jpeg_compress_struct.html">j_compress_ptr</a> cinfo));
00719 <a class="code" href="class_jpeg_destination_mgr.html#a0">JMETHOD</a>(<font class="keywordtype">void</font>, term_destination, (<a class="code" href="class_jpeg_compress_struct.html">j_compress_ptr</a> cinfo));
00720 };
00721
00722
00723 <font class="comment">/* Data source object for decompression */</font>
00724
<a name="l00725"></a><a class="code" href="class_jpeg_source_mgr.html">00725</a> <font class="keyword">struct </font><a class="code" href="class_jpeg_source_mgr.html">jpeg_source_mgr</a> {
<a name="l00726"></a><a class="code" href="class_jpeg_source_mgr.html#m0">00726</a> <font class="keyword">const</font> JOCTET * next_input_byte; <font class="comment">/* => next byte to read from buffer */</font>
<a name="l00727"></a><a class="code" href="class_jpeg_source_mgr.html#m1">00727</a> size_t bytes_in_buffer; <font class="comment">/* # of bytes remaining in buffer */</font>
00728
00729 <a class="code" href="class_jpeg_source_mgr.html#a0">JMETHOD</a>(<font class="keywordtype">void</font>, init_source, (<a class="code" href="class_jpeg_decompress_struct.html">j_decompress_ptr</a> cinfo));
00730 <a class="code" href="class_jpeg_source_mgr.html#a0">JMETHOD</a>(boolean, fill_input_buffer, (<a class="code" href="class_jpeg_decompress_struct.html">j_decompress_ptr</a> cinfo));
00731 <a class="code" href="class_jpeg_source_mgr.html#a0">JMETHOD</a>(<font class="keywordtype">void</font>, skip_input_data, (<a class="code" href="class_jpeg_decompress_struct.html">j_decompress_ptr</a> cinfo, <font class="keywordtype">long</font> num_bytes));
00732 <a class="code" href="class_jpeg_source_mgr.html#a0">JMETHOD</a>(boolean, resync_to_restart, (<a class="code" href="class_jpeg_decompress_struct.html">j_decompress_ptr</a> cinfo, <font class="keywordtype">int</font> desired));
00733 <a class="code" href="class_jpeg_source_mgr.html#a0">JMETHOD</a>(<font class="keywordtype">void</font>, term_source, (<a class="code" href="class_jpeg_decompress_struct.html">j_decompress_ptr</a> cinfo));
00734 };
00735
00736
00737 <font class="comment">/* Memory manager object.
</font>00738 <font class="comment"> * Allocates "small" objects (a few K total), "large" objects (tens of K),
</font>00739 <font class="comment"> * and "really big" objects (virtual arrays with backing store if needed).
</font>00740 <font class="comment"> * The memory manager does not allow individual objects to be freed; rather,
</font>00741 <font class="comment"> * each created object is assigned to a pool, and whole pools can be freed
</font>00742 <font class="comment"> * at once. This is faster and more convenient than remembering exactly what
</font>00743 <font class="comment"> * to free, especially where malloc()/free() are not too speedy.
</font>00744 <font class="comment"> * NB: alloc routines never return NULL. They exit to error_exit if not
</font>00745 <font class="comment"> * successful.
</font>00746 <font class="comment"> */</font>
00747
<a name="l00748"></a><a class="code" href="jpeglib_h.html#a15">00748</a> <font class="preprocessor">#define JPOOL_PERMANENT 0 </font><font class="comment">/* lasts until master record is destroyed */</font>
<a name="l00749"></a><a class="code" href="jpeglib_h.html#a16">00749</a> <font class="preprocessor">#define JPOOL_IMAGE 1 </font><font class="comment">/* lasts until done with image/datastream */</font>
<a name="l00750"></a><a class="code" href="jpeglib_h.html#a17">00750</a> <font class="preprocessor">#define JPOOL_NUMPOOLS 2
</font>00751 <font class="preprocessor"></font>
<a name="l00752"></a><a class="code" href="jpeglib_h.html#a44">00752</a> <font class="keyword">typedef</font> <font class="keyword">struct </font><a class="code" href="class_jvirt_sarray_control.html">jvirt_sarray_control</a> * <a class="code" href="class_jvirt_sarray_control.html">jvirt_sarray_ptr</a>;
<a name="l00753"></a><a class="code" href="jpeglib_h.html#a45">00753</a> <font class="keyword">typedef</font> <font class="keyword">struct </font><a class="code" href="class_jvirt_barray_control.html">jvirt_barray_control</a> * <a class="code" href="class_jvirt_barray_control.html">jvirt_barray_ptr</a>;
00754
00755
<a name="l00756"></a><a class="code" href="class_jpeg_memory_mgr.html">00756</a> <font class="keyword">struct </font><a class="code" href="class_jpeg_memory_mgr.html">jpeg_memory_mgr</a> {
00757 <font class="comment">/* Method pointers */</font>
00758 <a class="code" href="class_jpeg_memory_mgr.html#a0">JMETHOD</a>(<font class="keywordtype">void</font> *, alloc_small, (<a class="code" href="class_jpeg_common_struct.html">j_common_ptr</a> cinfo, <font class="keywordtype">int</font> pool_id,
00759 size_t sizeofobject));
00760 <a class="code" href="class_jpeg_memory_mgr.html#a0">JMETHOD</a>(<font class="keywordtype">void</font> <a class="code" href="class_jpeg_marker_struct.html">FAR</a> *, alloc_large, (<a class="code" href="class_jpeg_common_struct.html">j_common_ptr</a> cinfo, <font class="keywordtype">int</font> pool_id,
00761 size_t sizeofobject));
00762 <a class="code" href="class_jpeg_memory_mgr.html#a0">JMETHOD</a>(JSAMPARRAY, alloc_sarray, (<a class="code" href="class_jpeg_common_struct.html">j_common_ptr</a> cinfo, <font class="keywordtype">int</font> pool_id,
00763 JDIMENSION samplesperrow,
00764 JDIMENSION numrows));
00765 <a class="code" href="class_jpeg_memory_mgr.html#a0">JMETHOD</a>(JBLOCKARRAY, alloc_barray, (<a class="code" href="class_jpeg_common_struct.html">j_common_ptr</a> cinfo, <font class="keywordtype">int</font> pool_id,
00766 JDIMENSION blocksperrow,
00767 JDIMENSION numrows));
00768 <a class="code" href="class_jpeg_memory_mgr.html#a0">JMETHOD</a>(<a class="code" href="class_jvirt_sarray_control.html">jvirt_sarray_ptr</a>, request_virt_sarray, (<a class="code" href="class_jpeg_common_struct.html">j_common_ptr</a> cinfo,
00769 <font class="keywordtype">int</font> pool_id,
00770 boolean pre_zero,
00771 JDIMENSION samplesperrow,
00772 JDIMENSION numrows,
00773 JDIMENSION maxaccess));
00774 <a class="code" href="class_jpeg_memory_mgr.html#a0">JMETHOD</a>(<a class="code" href="class_jvirt_barray_control.html">jvirt_barray_ptr</a>, request_virt_barray, (<a class="code" href="class_jpeg_common_struct.html">j_common_ptr</a> cinfo,
00775 <font class="keywordtype">int</font> pool_id,
00776 boolean pre_zero,
00777 JDIMENSION blocksperrow,
00778 JDIMENSION numrows,
00779 JDIMENSION maxaccess));
00780 <a class="code" href="class_jpeg_memory_mgr.html#a0">JMETHOD</a>(<font class="keywordtype">void</font>, realize_virt_arrays, (<a class="code" href="class_jpeg_common_struct.html">j_common_ptr</a> cinfo));
00781 <a class="code" href="class_jpeg_memory_mgr.html#a0">JMETHOD</a>(JSAMPARRAY, access_virt_sarray, (<a class="code" href="class_jpeg_common_struct.html">j_common_ptr</a> cinfo,
00782 <a class="code" href="class_jvirt_sarray_control.html">jvirt_sarray_ptr</a> ptr,
00783 JDIMENSION start_row,
00784 JDIMENSION num_rows,
00785 boolean writable));
00786 <a class="code" href="class_jpeg_memory_mgr.html#a0">JMETHOD</a>(JBLOCKARRAY, access_virt_barray, (<a class="code" href="class_jpeg_common_struct.html">j_common_ptr</a> cinfo,
00787 <a class="code" href="class_jvirt_barray_control.html">jvirt_barray_ptr</a> ptr,
00788 JDIMENSION start_row,
00789 JDIMENSION num_rows,
00790 boolean writable));
00791 <a class="code" href="class_jpeg_memory_mgr.html#a0">JMETHOD</a>(<font class="keywordtype">void</font>, free_pool, (<a class="code" href="class_jpeg_common_struct.html">j_common_ptr</a> cinfo, <font class="keywordtype">int</font> pool_id));
00792 <a class="code" href="class_jpeg_memory_mgr.html#a0">JMETHOD</a>(<font class="keywordtype">void</font>, self_destruct, (<a class="code" href="class_jpeg_common_struct.html">j_common_ptr</a> cinfo));
00793
00794 <font class="comment">/* Limit on memory allocation for this JPEG object. (Note that this is
</font>00795 <font class="comment"> * merely advisory, not a guaranteed maximum; it only affects the space
</font>00796 <font class="comment"> * used for virtual-array buffers.) May be changed by outer application
</font>00797 <font class="comment"> * after creating the JPEG object.
</font>00798 <font class="comment"> */</font>
<a name="l00799"></a><a class="code" href="class_jpeg_memory_mgr.html#m0">00799</a> <font class="keywordtype">long</font> max_memory_to_use;
00800
00801 <font class="comment">/* Maximum allocation request accepted by alloc_large. */</font>
<a name="l00802"></a><a class="code" href="class_jpeg_memory_mgr.html#m1">00802</a> <font class="keywordtype">long</font> max_alloc_chunk;
00803 };
00804
00805
00806 <font class="comment">/* Routine signature for application-supplied marker processing methods.
</font>00807 <font class="comment"> * Need not pass marker code since it is stored in cinfo->unread_marker.
</font>00808 <font class="comment"> */</font>
00809 <font class="keyword">typedef</font> <a class="code" href="jmorecfg_h.html#a11">JMETHOD</a>(boolean, jpeg_marker_parser_method, (<a class="code" href="class_jpeg_decompress_struct.html">j_decompress_ptr</a> cinfo));
00810
00811
00812 <font class="comment">/* Declarations for routines called by application.
</font>00813 <font class="comment"> * The JPP macro hides prototype parameters from compilers that can't cope.
</font>00814 <font class="comment"> * Note JPP requires double parentheses.
</font>00815 <font class="comment"> */</font>
00816
00817 <font class="preprocessor">#ifdef HAVE_PROTOTYPES
</font>00818 <font class="preprocessor"></font><font class="preprocessor">#define JPP(arglist) arglist
</font>00819 <font class="preprocessor"></font><font class="preprocessor">#else
</font><a name="l00820"></a><a class="code" href="jpeglib_h.html#a18">00820</a> <font class="preprocessor"></font><font class="preprocessor">#define JPP(arglist) ()
</font>00821 <font class="preprocessor"></font><font class="preprocessor">#endif
</font>00822 <font class="preprocessor"></font>
00823
00824 <font class="comment">/* Short forms of external names for systems with brain-damaged linkers.
</font>00825 <font class="comment"> * We shorten external names to be unique in the first six letters, which
</font>00826 <font class="comment"> * is good enough for all known systems.
</font>00827 <font class="comment"> * (If your compiler itself needs names to be unique in less than 15
</font>00828 <font class="comment"> * characters, you are out of luck. Get a better compiler.)
</font>00829 <font class="comment"> */</font>
00830
00831 <font class="preprocessor">#ifdef NEED_SHORT_EXTERNAL_NAMES
</font>00832 <font class="preprocessor"></font><font class="preprocessor">#define jpeg_std_error jStdError
</font>00833 <font class="preprocessor"></font><font class="preprocessor">#define jpeg_CreateCompress jCreaCompress
</font>00834 <font class="preprocessor"></font><font class="preprocessor">#define jpeg_CreateDecompress jCreaDecompress
</font>00835 <font class="preprocessor"></font><font class="preprocessor">#define jpeg_destroy_compress jDestCompress
</font>00836 <font class="preprocessor"></font><font class="preprocessor">#define jpeg_destroy_decompress jDestDecompress
</font>00837 <font class="preprocessor"></font><font class="preprocessor">#define jpeg_stdio_dest jStdDest
</font>00838 <font class="preprocessor"></font><font class="preprocessor">#define jpeg_stdio_src jStdSrc
</font>00839 <font class="preprocessor"></font><font class="preprocessor">#define jpeg_set_defaults jSetDefaults
</font>00840 <font class="preprocessor"></font><font class="preprocessor">#define jpeg_set_colorspace jSetColorspace
</font>00841 <font class="preprocessor"></font><font class="preprocessor">#define jpeg_default_colorspace jDefColorspace
</font>00842 <font class="preprocessor"></font><font class="preprocessor">#define jpeg_set_quality jSetQuality
</font>00843 <font class="preprocessor"></font><font class="preprocessor">#define jpeg_set_linear_quality jSetLQuality
</font>00844 <font class="preprocessor"></font><font class="preprocessor">#define jpeg_add_quant_table jAddQuantTable
</font>00845 <font class="preprocessor"></font><font class="preprocessor">#define jpeg_quality_scaling jQualityScaling
</font>00846 <font class="preprocessor"></font><font class="preprocessor">#define jpeg_simple_progression jSimProgress
</font>00847 <font class="preprocessor"></font><font class="preprocessor">#define jpeg_suppress_tables jSuppressTables
</font>00848 <font class="preprocessor"></font><font class="preprocessor">#define jpeg_alloc_quant_table jAlcQTable
</font>00849 <font class="preprocessor"></font><font class="preprocessor">#define jpeg_alloc_huff_table jAlcHTable
</font>00850 <font class="preprocessor"></font><font class="preprocessor">#define jpeg_start_compress jStrtCompress
</font>00851 <font class="preprocessor"></font><font class="preprocessor">#define jpeg_write_scanlines jWrtScanlines
</font>00852 <font class="preprocessor"></font><font class="preprocessor">#define jpeg_finish_compress jFinCompress
</font>00853 <font class="preprocessor"></font><font class="preprocessor">#define jpeg_write_raw_data jWrtRawData
</font>00854 <font class="preprocessor"></font><font class="preprocessor">#define jpeg_write_marker jWrtMarker
</font>00855 <font class="preprocessor"></font><font class="preprocessor">#define jpeg_write_m_header jWrtMHeader
</font>00856 <font class="preprocessor"></font><font class="preprocessor">#define jpeg_write_m_byte jWrtMByte
</font>00857 <font class="preprocessor"></font><font class="preprocessor">#define jpeg_write_tables jWrtTables
</font>00858 <font class="preprocessor"></font><font class="preprocessor">#define jpeg_read_header jReadHeader
</font>00859 <font class="preprocessor"></font><font class="preprocessor">#define jpeg_start_decompress jStrtDecompress
</font>00860 <font class="preprocessor"></font><font class="preprocessor">#define jpeg_read_scanlines jReadScanlines
</font>00861 <font class="preprocessor"></font><font class="preprocessor">#define jpeg_finish_decompress jFinDecompress
</font>00862 <font class="preprocessor"></font><font class="preprocessor">#define jpeg_read_raw_data jReadRawData
</font>00863 <font class="preprocessor"></font><font class="preprocessor">#define jpeg_has_multiple_scans jHasMultScn
</font>00864 <font class="preprocessor"></font><font class="preprocessor">#define jpeg_start_output jStrtOutput
</font>00865 <font class="preprocessor"></font><font class="preprocessor">#define jpeg_finish_output jFinOutput
</font>00866 <font class="preprocessor"></font><font class="preprocessor">#define jpeg_input_complete jInComplete
</font>00867 <font class="preprocessor"></font><font class="preprocessor">#define jpeg_new_colormap jNewCMap
</font>00868 <font class="preprocessor"></font><font class="preprocessor">#define jpeg_consume_input jConsumeInput
</font>00869 <font class="preprocessor"></font><font class="preprocessor">#define jpeg_calc_output_dimensions jCalcDimensions
</font>00870 <font class="preprocessor"></font><font class="preprocessor">#define jpeg_save_markers jSaveMarkers
</font>00871 <font class="preprocessor"></font><font class="preprocessor">#define jpeg_set_marker_processor jSetMarker
</font>00872 <font class="preprocessor"></font><font class="preprocessor">#define jpeg_read_coefficients jReadCoefs
</font>00873 <font class="preprocessor"></font><font class="preprocessor">#define jpeg_write_coefficients jWrtCoefs
</font>00874 <font class="preprocessor"></font><font class="preprocessor">#define jpeg_copy_critical_parameters jCopyCrit
</font>00875 <font class="preprocessor"></font><font class="preprocessor">#define jpeg_abort_compress jAbrtCompress
</font>00876 <font class="preprocessor"></font><font class="preprocessor">#define jpeg_abort_decompress jAbrtDecompress
</font>00877 <font class="preprocessor"></font><font class="preprocessor">#define jpeg_abort jAbort
</font>00878 <font class="preprocessor"></font><font class="preprocessor">#define jpeg_destroy jDestroy
</font>00879 <font class="preprocessor"></font><font class="preprocessor">#define jpeg_resync_to_restart jResyncRestart
</font>00880 <font class="preprocessor"></font><font class="preprocessor">#endif </font><font class="comment">/* NEED_SHORT_EXTERNAL_NAMES */</font>
00881
00882
00883 <font class="comment">/* Default error-management setup */</font>
00884 <a class="code" href="jmorecfg_h.html#a10">EXTERN</a>(<font class="keyword">struct</font> <a class="code" href="class_jpeg_error_mgr.html">jpeg_error_mgr</a> *) jpeg_std_error
00885 <a class="code" href="jpeglib_h.html#a18">JPP</a>((<font class="keyword">struct</font> <a class="code" href="class_jpeg_error_mgr.html">jpeg_error_mgr</a> * err));
00886
00887 <font class="comment">/* Initialization of JPEG compression objects.
</font>00888 <font class="comment"> * jpeg_create_compress() and jpeg_create_decompress() are the exported
</font>00889 <font class="comment"> * names that applications should call. These expand to calls on
</font>00890 <font class="comment"> * jpeg_CreateCompress and jpeg_CreateDecompress with additional information
</font>00891 <font class="comment"> * passed for version mismatch checking.
</font>00892 <font class="comment"> * NB: you must set up the error-manager BEFORE calling jpeg_create_xxx.
</font>00893 <font class="comment"> */</font>
<a name="l00894"></a><a class="code" href="jpeglib_h.html#a19">00894</a> <font class="preprocessor">#define jpeg_create_compress(cinfo) \
</font>00895 <font class="preprocessor"> jpeg_CreateCompress((cinfo), JPEG_LIB_VERSION, \
</font>00896 <font class="preprocessor"> (size_t) sizeof(struct jpeg_compress_struct))
</font><a name="l00897"></a><a class="code" href="jpeglib_h.html#a20">00897</a> <font class="preprocessor"></font><font class="preprocessor">#define jpeg_create_decompress(cinfo) \
</font>00898 <font class="preprocessor"> jpeg_CreateDecompress((cinfo), JPEG_LIB_VERSION, \
</font>00899 <font class="preprocessor"> (size_t) sizeof(struct jpeg_decompress_struct))
</font>00900 <font class="preprocessor"></font><a class="code" href="jmorecfg_h.html#a10">EXTERN</a>(<font class="keywordtype">void</font>) jpeg_CreateCompress <a class="code" href="jpeglib_h.html#a18">JPP</a>((<a class="code" href="class_jpeg_compress_struct.html">j_compress_ptr</a> cinfo,
00901 <font class="keywordtype">int</font> version, size_t structsize));
00902 <a class="code" href="jmorecfg_h.html#a10">EXTERN</a>(<font class="keywordtype">void</font>) jpeg_CreateDecompress <a class="code" href="jpeglib_h.html#a18">JPP</a>((<a class="code" href="class_jpeg_decompress_struct.html">j_decompress_ptr</a> cinfo,
00903 <font class="keywordtype">int</font> version, size_t structsize));
00904 <font class="comment">/* Destruction of JPEG compression objects */</font>
00905 <a class="code" href="jmorecfg_h.html#a10">EXTERN</a>(<font class="keywordtype">void</font>) jpeg_destroy_compress <a class="code" href="jpeglib_h.html#a18">JPP</a>((<a class="code" href="class_jpeg_compress_struct.html">j_compress_ptr</a> cinfo));
00906 <a class="code" href="jmorecfg_h.html#a10">EXTERN</a>(<font class="keywordtype">void</font>) jpeg_destroy_decompress <a class="code" href="jpeglib_h.html#a18">JPP</a>((<a class="code" href="class_jpeg_decompress_struct.html">j_decompress_ptr</a> cinfo));
00907
00908 <font class="comment">/* Standard data source and destination managers: stdio streams. */</font>
00909 <font class="comment">/* Caller is responsible for opening the file before and closing after. */</font>
00910 <a class="code" href="jmorecfg_h.html#a10">EXTERN</a>(<font class="keywordtype">void</font>) jpeg_stdio_dest <a class="code" href="jpeglib_h.html#a18">JPP</a>((<a class="code" href="class_jpeg_compress_struct.html">j_compress_ptr</a> cinfo, FILE * outfile));
00911 <a class="code" href="jmorecfg_h.html#a10">EXTERN</a>(<font class="keywordtype">void</font>) jpeg_stdio_src <a class="code" href="jpeglib_h.html#a18">JPP</a>((<a class="code" href="class_jpeg_decompress_struct.html">j_decompress_ptr</a> cinfo, FILE * infile));
00912
00913 <font class="comment">/* Default parameter setup for compression */</font>
00914 <a class="code" href="jmorecfg_h.html#a10">EXTERN</a>(<font class="keywordtype">void</font>) jpeg_set_defaults <a class="code" href="jpeglib_h.html#a18">JPP</a>((<a class="code" href="class_jpeg_compress_struct.html">j_compress_ptr</a> cinfo));
00915 <font class="comment">/* Compression parameter setup aids */</font>
00916 <a class="code" href="jmorecfg_h.html#a10">EXTERN</a>(<font class="keywordtype">void</font>) jpeg_set_colorspace <a class="code" href="jpeglib_h.html#a18">JPP</a>((<a class="code" href="class_jpeg_compress_struct.html">j_compress_ptr</a> cinfo,
00917 J_COLOR_SPACE colorspace));
00918 <a class="code" href="jmorecfg_h.html#a10">EXTERN</a>(<font class="keywordtype">void</font>) jpeg_default_colorspace <a class="code" href="jpeglib_h.html#a18">JPP</a>((<a class="code" href="class_jpeg_compress_struct.html">j_compress_ptr</a> cinfo));
00919 <a class="code" href="jmorecfg_h.html#a10">EXTERN</a>(<font class="keywordtype">void</font>) jpeg_set_quality <a class="code" href="jpeglib_h.html#a18">JPP</a>((<a class="code" href="class_jpeg_compress_struct.html">j_compress_ptr</a> cinfo, <font class="keywordtype">int</font> quality,
00920 boolean force_baseline));
00921 <a class="code" href="jmorecfg_h.html#a10">EXTERN</a>(<font class="keywordtype">void</font>) jpeg_set_linear_quality <a class="code" href="jpeglib_h.html#a18">JPP</a>((<a class="code" href="class_jpeg_compress_struct.html">j_compress_ptr</a> cinfo,
00922 <font class="keywordtype">int</font> scale_factor,
00923 boolean force_baseline));
00924 <a class="code" href="jmorecfg_h.html#a10">EXTERN</a>(<font class="keywordtype">void</font>) jpeg_add_quant_table <a class="code" href="jpeglib_h.html#a18">JPP</a>((<a class="code" href="class_jpeg_compress_struct.html">j_compress_ptr</a> cinfo, <font class="keywordtype">int</font> which_tbl,
00925 <font class="keyword">const</font> <font class="keywordtype">unsigned</font> <font class="keywordtype">int</font> *basic_table,
00926 <font class="keywordtype">int</font> scale_factor,
00927 boolean force_baseline));
00928 <a class="code" href="jmorecfg_h.html#a10">EXTERN</a>(<font class="keywordtype">int</font>) jpeg_quality_scaling <a class="code" href="jpeglib_h.html#a18">JPP</a>((<font class="keywordtype">int</font> quality));
00929 <a class="code" href="jmorecfg_h.html#a10">EXTERN</a>(<font class="keywordtype">void</font>) jpeg_simple_progression <a class="code" href="jpeglib_h.html#a18">JPP</a>((<a class="code" href="class_jpeg_compress_struct.html">j_compress_ptr</a> cinfo));
00930 <a class="code" href="jmorecfg_h.html#a10">EXTERN</a>(<font class="keywordtype">void</font>) jpeg_suppress_tables <a class="code" href="jpeglib_h.html#a18">JPP</a>((<a class="code" href="class_jpeg_compress_struct.html">j_compress_ptr</a> cinfo,
00931 boolean suppress));
00932 <a class="code" href="jmorecfg_h.html#a10">EXTERN</a>(<a class="code" href="class_JQUANT_TBL.html">JQUANT_TBL</a> *) jpeg_alloc_quant_table <a class="code" href="jpeglib_h.html#a18">JPP</a>((<a class="code" href="class_jpeg_common_struct.html">j_common_ptr</a> cinfo));
00933 <a class="code" href="jmorecfg_h.html#a10">EXTERN</a>(<a class="code" href="class_JHUFF_TBL.html">JHUFF_TBL</a> *) jpeg_alloc_huff_table <a class="code" href="jpeglib_h.html#a18">JPP</a>((<a class="code" href="class_jpeg_common_struct.html">j_common_ptr</a> cinfo));
00934
00935 <font class="comment">/* Main entry points for compression */</font>
00936 <a class="code" href="jmorecfg_h.html#a10">EXTERN</a>(<font class="keywordtype">void</font>) jpeg_start_compress <a class="code" href="jpeglib_h.html#a18">JPP</a>((<a class="code" href="class_jpeg_compress_struct.html">j_compress_ptr</a> cinfo,
00937 boolean write_all_tables));
00938 <a class="code" href="jmorecfg_h.html#a10">EXTERN</a>(JDIMENSION) jpeg_write_scanlines <a class="code" href="jpeglib_h.html#a18">JPP</a>((<a class="code" href="class_jpeg_compress_struct.html">j_compress_ptr</a> cinfo,
00939 JSAMPARRAY scanlines,
00940 JDIMENSION num_lines));
00941 <a class="code" href="jmorecfg_h.html#a10">EXTERN</a>(<font class="keywordtype">void</font>) jpeg_finish_compress <a class="code" href="jpeglib_h.html#a18">JPP</a>((<a class="code" href="class_jpeg_compress_struct.html">j_compress_ptr</a> cinfo));
00942
00943 <font class="comment">/* Replaces jpeg_write_scanlines when writing raw downsampled data. */</font>
00944 <a class="code" href="jmorecfg_h.html#a10">EXTERN</a>(JDIMENSION) jpeg_write_raw_data <a class="code" href="jpeglib_h.html#a18">JPP</a>((<a class="code" href="class_jpeg_compress_struct.html">j_compress_ptr</a> cinfo,
00945 JSAMPIMAGE data,
00946 JDIMENSION num_lines));
00947
00948 <font class="comment">/* Write a special marker. See libjpeg.doc concerning safe usage. */</font>
00949 <a class="code" href="jmorecfg_h.html#a10">EXTERN</a>(<font class="keywordtype">void</font>) jpeg_write_marker
00950 <a class="code" href="jpeglib_h.html#a18">JPP</a>((<a class="code" href="class_jpeg_compress_struct.html">j_compress_ptr</a> cinfo, <font class="keywordtype">int</font> marker,
00951 <font class="keyword">const</font> JOCTET * dataptr, <font class="keywordtype">unsigned</font> <font class="keywordtype">int</font> datalen));
00952 <font class="comment">/* Same, but piecemeal. */</font>
00953 <a class="code" href="jmorecfg_h.html#a10">EXTERN</a>(<font class="keywordtype">void</font>) jpeg_write_m_header
00954 <a class="code" href="jpeglib_h.html#a18">JPP</a>((<a class="code" href="class_jpeg_compress_struct.html">j_compress_ptr</a> cinfo, <font class="keywordtype">int</font> marker, <font class="keywordtype">unsigned</font> <font class="keywordtype">int</font> datalen));
00955 <a class="code" href="jmorecfg_h.html#a10">EXTERN</a>(<font class="keywordtype">void</font>) jpeg_write_m_byte
00956 <a class="code" href="jpeglib_h.html#a18">JPP</a>((<a class="code" href="class_jpeg_compress_struct.html">j_compress_ptr</a> cinfo, <font class="keywordtype">int</font> val));
00957
00958 <font class="comment">/* Alternate compression function: just write an abbreviated table file */</font>
00959 <a class="code" href="jmorecfg_h.html#a10">EXTERN</a>(<font class="keywordtype">void</font>) jpeg_write_tables <a class="code" href="jpeglib_h.html#a18">JPP</a>((<a class="code" href="class_jpeg_compress_struct.html">j_compress_ptr</a> cinfo));
00960
00961 <font class="comment">/* Decompression startup: read start of JPEG datastream to see what's there */</font>
00962 <a class="code" href="jmorecfg_h.html#a10">EXTERN</a>(<font class="keywordtype">int</font>) jpeg_read_header <a class="code" href="jpeglib_h.html#a18">JPP</a>((<a class="code" href="class_jpeg_decompress_struct.html">j_decompress_ptr</a> cinfo,
00963 boolean require_image));
00964 <font class="comment">/* Return value is one of: */</font>
<a name="l00965"></a><a class="code" href="jpeglib_h.html#a21">00965</a> <font class="preprocessor">#define JPEG_SUSPENDED 0 </font><font class="comment">/* Suspended due to lack of input data */</font>
<a name="l00966"></a><a class="code" href="jpeglib_h.html#a22">00966</a> <font class="preprocessor">#define JPEG_HEADER_OK 1 </font><font class="comment">/* Found valid image datastream */</font>
<a name="l00967"></a><a class="code" href="jpeglib_h.html#a23">00967</a> <font class="preprocessor">#define JPEG_HEADER_TABLES_ONLY 2 </font><font class="comment">/* Found valid table-specs-only datastream */</font>
00968 <font class="comment">/* If you pass require_image = TRUE (normal case), you need not check for
</font>00969 <font class="comment"> * a TABLES_ONLY return code; an abbreviated file will cause an error exit.
</font>00970 <font class="comment"> * JPEG_SUSPENDED is only possible if you use a data source module that can
</font>00971 <font class="comment"> * give a suspension return (the stdio source module doesn't).
</font>00972 <font class="comment"> */</font>
00973
00974 <font class="comment">/* Main entry points for decompression */</font>
00975 <a class="code" href="jmorecfg_h.html#a10">EXTERN</a>(boolean) jpeg_start_decompress <a class="code" href="jpeglib_h.html#a18">JPP</a>((<a class="code" href="class_jpeg_decompress_struct.html">j_decompress_ptr</a> cinfo));
00976 <a class="code" href="jmorecfg_h.html#a10">EXTERN</a>(JDIMENSION) jpeg_read_scanlines <a class="code" href="jpeglib_h.html#a18">JPP</a>((<a class="code" href="class_jpeg_decompress_struct.html">j_decompress_ptr</a> cinfo,
00977 JSAMPARRAY scanlines,
00978 JDIMENSION max_lines));
00979 <a class="code" href="jmorecfg_h.html#a10">EXTERN</a>(boolean) jpeg_finish_decompress <a class="code" href="jpeglib_h.html#a18">JPP</a>((<a class="code" href="class_jpeg_decompress_struct.html">j_decompress_ptr</a> cinfo));
00980
00981 <font class="comment">/* Replaces jpeg_read_scanlines when reading raw downsampled data. */</font>
00982 <a class="code" href="jmorecfg_h.html#a10">EXTERN</a>(JDIMENSION) jpeg_read_raw_data <a class="code" href="jpeglib_h.html#a18">JPP</a>((<a class="code" href="class_jpeg_decompress_struct.html">j_decompress_ptr</a> cinfo,
00983 JSAMPIMAGE data,
00984 JDIMENSION max_lines));
00985
00986 <font class="comment">/* Additional entry points for buffered-image mode. */</font>
00987 <a class="code" href="jmorecfg_h.html#a10">EXTERN</a>(boolean) jpeg_has_multiple_scans <a class="code" href="jpeglib_h.html#a18">JPP</a>((<a class="code" href="class_jpeg_decompress_struct.html">j_decompress_ptr</a> cinfo));
00988 <a class="code" href="jmorecfg_h.html#a10">EXTERN</a>(boolean) jpeg_start_output <a class="code" href="jpeglib_h.html#a18">JPP</a>((<a class="code" href="class_jpeg_decompress_struct.html">j_decompress_ptr</a> cinfo,
00989 <font class="keywordtype">int</font> scan_number));
00990 <a class="code" href="jmorecfg_h.html#a10">EXTERN</a>(boolean) jpeg_finish_output <a class="code" href="jpeglib_h.html#a18">JPP</a>((<a class="code" href="class_jpeg_decompress_struct.html">j_decompress_ptr</a> cinfo));
00991 <a class="code" href="jmorecfg_h.html#a10">EXTERN</a>(boolean) jpeg_input_complete <a class="code" href="jpeglib_h.html#a18">JPP</a>((<a class="code" href="class_jpeg_decompress_struct.html">j_decompress_ptr</a> cinfo));
00992 <a class="code" href="jmorecfg_h.html#a10">EXTERN</a>(<font class="keywordtype">void</font>) jpeg_new_colormap <a class="code" href="jpeglib_h.html#a18">JPP</a>((<a class="code" href="class_jpeg_decompress_struct.html">j_decompress_ptr</a> cinfo));
00993 <a class="code" href="jmorecfg_h.html#a10">EXTERN</a>(<font class="keywordtype">int</font>) jpeg_consume_input <a class="code" href="jpeglib_h.html#a18">JPP</a>((<a class="code" href="class_jpeg_decompress_struct.html">j_decompress_ptr</a> cinfo));
00994 <font class="comment">/* Return value is one of: */</font>
00995 <font class="comment">/* #define JPEG_SUSPENDED 0 Suspended due to lack of input data */</font>
<a name="l00996"></a><a class="code" href="jpeglib_h.html#a24">00996</a> <font class="preprocessor">#define JPEG_REACHED_SOS 1 </font><font class="comment">/* Reached start of new scan */</font>
<a name="l00997"></a><a class="code" href="jpeglib_h.html#a25">00997</a> <font class="preprocessor">#define JPEG_REACHED_EOI 2 </font><font class="comment">/* Reached end of image */</font>
<a name="l00998"></a><a class="code" href="jpeglib_h.html#a26">00998</a> <font class="preprocessor">#define JPEG_ROW_COMPLETED 3 </font><font class="comment">/* Completed one iMCU row */</font>
<a name="l00999"></a><a class="code" href="jpeglib_h.html#a27">00999</a> <font class="preprocessor">#define JPEG_SCAN_COMPLETED 4 </font><font class="comment">/* Completed last iMCU row of a scan */</font>
01000
01001 <font class="comment">/* Precalculate output dimensions for current decompression parameters. */</font>
01002 <a class="code" href="jmorecfg_h.html#a10">EXTERN</a>(<font class="keywordtype">void</font>) jpeg_calc_output_dimensions <a class="code" href="jpeglib_h.html#a18">JPP</a>((<a class="code" href="class_jpeg_decompress_struct.html">j_decompress_ptr</a> cinfo));
01003
01004 <font class="comment">/* Control saving of COM and APPn markers into marker_list. */</font>
01005 <a class="code" href="jmorecfg_h.html#a10">EXTERN</a>(<font class="keywordtype">void</font>) jpeg_save_markers
01006 <a class="code" href="jpeglib_h.html#a18">JPP</a>((<a class="code" href="class_jpeg_decompress_struct.html">j_decompress_ptr</a> cinfo, <font class="keywordtype">int</font> marker_code,
01007 <font class="keywordtype">unsigned</font> <font class="keywordtype">int</font> length_limit));
01008
01009 <font class="comment">/* Install a special processing method for COM or APPn markers. */</font>
01010 <a class="code" href="jmorecfg_h.html#a10">EXTERN</a>(<font class="keywordtype">void</font>) jpeg_set_marker_processor
01011 <a class="code" href="jpeglib_h.html#a18">JPP</a>((<a class="code" href="class_jpeg_decompress_struct.html">j_decompress_ptr</a> cinfo, <font class="keywordtype">int</font> marker_code,
01012 jpeg_marker_parser_method routine));
01013
01014 <font class="comment">/* Read or write raw DCT coefficients --- useful for lossless transcoding. */</font>
01015 <a class="code" href="jmorecfg_h.html#a10">EXTERN</a>(<a class="code" href="class_jvirt_barray_control.html">jvirt_barray_ptr</a> *) jpeg_read_coefficients <a class="code" href="jpeglib_h.html#a18">JPP</a>((<a class="code" href="class_jpeg_decompress_struct.html">j_decompress_ptr</a> cinfo));
01016 <a class="code" href="jmorecfg_h.html#a10">EXTERN</a>(<font class="keywordtype">void</font>) jpeg_write_coefficients <a class="code" href="jpeglib_h.html#a18">JPP</a>((<a class="code" href="class_jpeg_compress_struct.html">j_compress_ptr</a> cinfo,
01017 <a class="code" href="class_jvirt_barray_control.html">jvirt_barray_ptr</a> * coef_arrays));
01018 <a class="code" href="jmorecfg_h.html#a10">EXTERN</a>(<font class="keywordtype">void</font>) jpeg_copy_critical_parameters <a class="code" href="jpeglib_h.html#a18">JPP</a>((<a class="code" href="class_jpeg_decompress_struct.html">j_decompress_ptr</a> srcinfo,
01019 <a class="code" href="class_jpeg_compress_struct.html">j_compress_ptr</a> dstinfo));
01020
01021 <font class="comment">/* If you choose to abort compression or decompression before completing
</font>01022 <font class="comment"> * jpeg_finish_(de)compress, then you need to clean up to release memory,
</font>01023 <font class="comment"> * temporary files, etc. You can just call jpeg_destroy_(de)compress
</font>01024 <font class="comment"> * if you're done with the JPEG object, but if you want to clean it up and
</font>01025 <font class="comment"> * reuse it, call this:
</font>01026 <font class="comment"> */</font>
01027 <a class="code" href="jmorecfg_h.html#a10">EXTERN</a>(<font class="keywordtype">void</font>) jpeg_abort_compress <a class="code" href="jpeglib_h.html#a18">JPP</a>((<a class="code" href="class_jpeg_compress_struct.html">j_compress_ptr</a> cinfo));
01028 <a class="code" href="jmorecfg_h.html#a10">EXTERN</a>(<font class="keywordtype">void</font>) jpeg_abort_decompress <a class="code" href="jpeglib_h.html#a18">JPP</a>((<a class="code" href="class_jpeg_decompress_struct.html">j_decompress_ptr</a> cinfo));
01029
01030 <font class="comment">/* Generic versions of jpeg_abort and jpeg_destroy that work on either
</font>01031 <font class="comment"> * flavor of JPEG object. These may be more convenient in some places.
</font>01032 <font class="comment"> */</font>
01033 <a class="code" href="jmorecfg_h.html#a10">EXTERN</a>(<font class="keywordtype">void</font>) jpeg_abort <a class="code" href="jpeglib_h.html#a18">JPP</a>((<a class="code" href="class_jpeg_common_struct.html">j_common_ptr</a> cinfo));
01034 <a class="code" href="jmorecfg_h.html#a10">EXTERN</a>(<font class="keywordtype">void</font>) jpeg_destroy <a class="code" href="jpeglib_h.html#a18">JPP</a>((<a class="code" href="class_jpeg_common_struct.html">j_common_ptr</a> cinfo));
01035
01036 <font class="comment">/* Default restart-marker-resync procedure for use by data source modules */</font>
01037 <a class="code" href="jmorecfg_h.html#a10">EXTERN</a>(boolean) jpeg_resync_to_restart <a class="code" href="jpeglib_h.html#a18">JPP</a>((<a class="code" href="class_jpeg_decompress_struct.html">j_decompress_ptr</a> cinfo,
01038 <font class="keywordtype">int</font> desired));
01039
01040
01041 <font class="comment">/* These marker codes are exported since applications and data source modules
</font>01042 <font class="comment"> * are likely to want to use them.
</font>01043 <font class="comment"> */</font>
01044
<a name="l01045"></a><a class="code" href="jpeglib_h.html#a28">01045</a> <font class="preprocessor">#define JPEG_RST0 0xD0 </font><font class="comment">/* RST0 marker code */</font>
<a name="l01046"></a><a class="code" href="jpeglib_h.html#a29">01046</a> <font class="preprocessor">#define JPEG_EOI 0xD9 </font><font class="comment">/* EOI marker code */</font>
<a name="l01047"></a><a class="code" href="jpeglib_h.html#a30">01047</a> <font class="preprocessor">#define JPEG_APP0 0xE0 </font><font class="comment">/* APP0 marker code */</font>
<a name="l01048"></a><a class="code" href="jpeglib_h.html#a31">01048</a> <font class="preprocessor">#define JPEG_COM 0xFE </font><font class="comment">/* COM marker code */</font>
01049
01050
01051 <font class="comment">/* If we have a brain-damaged compiler that emits warnings (or worse, errors)
</font>01052 <font class="comment"> * for structure definitions that are never filled in, keep it quiet by
</font>01053 <font class="comment"> * supplying dummy definitions for the various substructures.
</font>01054 <font class="comment"> */</font>
01055
01056 <font class="preprocessor">#ifdef INCOMPLETE_TYPES_BROKEN
</font>01057 <font class="preprocessor"></font><font class="preprocessor">#ifndef JPEG_INTERNALS </font><font class="comment">/* will be defined in jpegint.h */</font>
01058 <font class="keyword">struct </font><a class="code" href="class_jvirt_sarray_control.html">jvirt_sarray_control</a> { <font class="keywordtype">long</font> dummy; };
01059 <font class="keyword">struct </font><a class="code" href="class_jvirt_barray_control.html">jvirt_barray_control</a> { <font class="keywordtype">long</font> dummy; };
01060 <font class="keyword">struct </font><a class="code" href="class_jpeg_comp_master.html">jpeg_comp_master</a> { <font class="keywordtype">long</font> dummy; };
01061 <font class="keyword">struct </font><a class="code" href="class_jpeg_c_main_controller.html">jpeg_c_main_controller</a> { <font class="keywordtype">long</font> dummy; };
01062 <font class="keyword">struct </font><a class="code" href="class_jpeg_c_prep_controller.html">jpeg_c_prep_controller</a> { <font class="keywordtype">long</font> dummy; };
01063 <font class="keyword">struct </font><a class="code" href="class_jpeg_c_coef_controller.html">jpeg_c_coef_controller</a> { <font class="keywordtype">long</font> dummy; };
01064 <font class="keyword">struct </font><a class="code" href="class_jpeg_marker_writer.html">jpeg_marker_writer</a> { <font class="keywordtype">long</font> dummy; };
01065 <font class="keyword">struct </font><a class="code" href="class_jpeg_color_converter.html">jpeg_color_converter</a> { <font class="keywordtype">long</font> dummy; };
01066 <font class="keyword">struct </font><a class="code" href="class_jpeg_downsampler.html">jpeg_downsampler</a> { <font class="keywordtype">long</font> dummy; };
01067 <font class="keyword">struct </font><a class="code" href="class_jpeg_forward_dct.html">jpeg_forward_dct</a> { <font class="keywordtype">long</font> dummy; };
01068 <font class="keyword">struct </font><a class="code" href="class_jpeg_entropy_encoder.html">jpeg_entropy_encoder</a> { <font class="keywordtype">long</font> dummy; };
01069 <font class="keyword">struct </font><a class="code" href="class_jpeg_decomp_master.html">jpeg_decomp_master</a> { <font class="keywordtype">long</font> dummy; };
01070 <font class="keyword">struct </font><a class="code" href="class_jpeg_d_main_controller.html">jpeg_d_main_controller</a> { <font class="keywordtype">long</font> dummy; };
01071 <font class="keyword">struct </font><a class="code" href="class_jpeg_d_coef_controller.html">jpeg_d_coef_controller</a> { <font class="keywordtype">long</font> dummy; };
01072 <font class="keyword">struct </font><a class="code" href="class_jpeg_d_post_controller.html">jpeg_d_post_controller</a> { <font class="keywordtype">long</font> dummy; };
01073 <font class="keyword">struct </font><a class="code" href="class_jpeg_input_controller.html">jpeg_input_controller</a> { <font class="keywordtype">long</font> dummy; };
01074 <font class="keyword">struct </font><a class="code" href="class_jpeg_marker_reader.html">jpeg_marker_reader</a> { <font class="keywordtype">long</font> dummy; };
01075 <font class="keyword">struct </font><a class="code" href="class_jpeg_entropy_decoder.html">jpeg_entropy_decoder</a> { <font class="keywordtype">long</font> dummy; };
01076 <font class="keyword">struct </font><a class="code" href="class_jpeg_inverse_dct.html">jpeg_inverse_dct</a> { <font class="keywordtype">long</font> dummy; };
01077 <font class="keyword">struct </font><a class="code" href="class_jpeg_upsampler.html">jpeg_upsampler</a> { <font class="keywordtype">long</font> dummy; };
01078 <font class="keyword">struct </font><a class="code" href="class_jpeg_color_deconverter.html">jpeg_color_deconverter</a> { <font class="keywordtype">long</font> dummy; };
01079 <font class="keyword">struct </font><a class="code" href="class_jpeg_color_quantizer.html">jpeg_color_quantizer</a> { <font class="keywordtype">long</font> dummy; };
01080 <font class="preprocessor">#endif </font><font class="comment">/* JPEG_INTERNALS */</font>
01081 <font class="preprocessor">#endif </font><font class="comment">/* INCOMPLETE_TYPES_BROKEN */</font>
01082
01083
01084 <font class="comment">/*
</font>01085 <font class="comment"> * The JPEG library modules define JPEG_INTERNALS before including this file.
</font>01086 <font class="comment"> * The internal structure declarations are read only when that is true.
</font>01087 <font class="comment"> * Applications using the library should not include jpegint.h, but may wish
</font>01088 <font class="comment"> * to include jerror.h.
</font>01089 <font class="comment"> */</font>
01090
01091 <font class="preprocessor">#ifdef JPEG_INTERNALS
</font>01092 <font class="preprocessor"></font><font class="preprocessor">#include "<a class="code" href="jpegint_h.html">jpegint.h</a>"</font> <font class="comment">/* fetch private declarations */</font>
01093 <font class="preprocessor">#include "<a class="code" href="jerror_h.html">jerror.h</a>"</font> <font class="comment">/* fetch error codes too */</font>
01094 <font class="preprocessor">#endif
</font>01095 <font class="preprocessor"></font>
01096 <font class="preprocessor">#endif </font><font class="comment">/* JPEGLIB_H */</font>
</div></pre>
<!-- footer -->
<BR><FONT Size=+5> </FONT>
</TD>
<TD WIDTH=15><IMG SRC=/inc/img/pixel.gif WIDTH=15 HEIGHT=15 BORDER=0 ALT=""></TD>
</TR>
</TABLE>
</BODY>
</HTML>
|
