forked from chkob/cximage_full
-
Notifications
You must be signed in to change notification settings - Fork 0
/
Copy pathlibmng_zlib.c
607 lines (509 loc) · 21.6 KB
/
libmng_zlib.c
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
/* ************************************************************************** */
/* * For conditions of distribution and use, * */
/* * see copyright notice in libmng.h * */
/* ************************************************************************** */
/* * * */
/* * project : libmng * */
/* * file : libmng_zlib.c copyright (c) 2000-2004 G.Juyn * */
/* * version : 1.0.9 * */
/* * * */
/* * purpose : ZLIB library interface (implementation) * */
/* * * */
/* * author : G.Juyn * */
/* * * */
/* * comment : implementation of the ZLIB library interface * */
/* * * */
/* * changes : 0.5.1 - 05/08/2000 - G.Juyn * */
/* * - changed strict-ANSI stuff * */
/* * 0.5.1 - 05/11/2000 - G.Juyn * */
/* * - filled the deflatedata routine * */
/* * 0.5.1 - 05/12/2000 - G.Juyn * */
/* * - changed trace to macro for callback error-reporting * */
/* * * */
/* * 0.5.2 - 05/20/2000 - G.Juyn * */
/* * - fixed for JNG alpha handling * */
/* * 0.5.2 - 05/24/2000 - G.Juyn * */
/* * - moved init of default zlib parms from here to * */
/* * "mng_hlapi.c" * */
/* * * */
/* * 0.5.3 - 06/16/2000 - G.Juyn * */
/* * - changed progressive-display processing * */
/* * * */
/* * 0.9.2 - 08/05/2000 - G.Juyn * */
/* * - changed file-prefixes * */
/* * * */
/* * 0.9.3 - 08/08/2000 - G.Juyn * */
/* * - fixed compiler-warnings from Mozilla * */
/* * 0.9.3 - 09/07/2000 - G.Juyn * */
/* * - added support for new filter_types * */
/* * * */
/* * 1.0.5 - 08/07/2002 - G.Juyn * */
/* * - added test-option for PNG filter method 193 (=no filter) * */
/* * 1.0.5 - 08/19/2002 - G.Juyn * */
/* * - B597134 - libmng pollutes the linker namespace * */
/* * 1.0.5 - 09/19/2002 - G.Juyn * */
/* * - added warning for too much IDAT data * */
/* * * */
/* * 1.0.6 - 07/07/2003 - G.R-P * */
/* * - added MNG_NO_16BIT_SUPPORT support * */
/* * * */
/* * 1.0.9 - 10/09/2004 - G.R-P * */
/* * - added MNG_NO_1_2_4BIT_SUPPORT support * */
/* * * */
/* ************************************************************************** */
#include "libmng.h"
#include "libmng_data.h"
#include "libmng_error.h"
#include "libmng_trace.h"
#ifdef __BORLANDC__
#pragma hdrstop
#endif
#include "libmng_memory.h"
#include "libmng_pixels.h"
#include "libmng_filter.h"
#include "libmng_zlib.h"
#if defined(__BORLANDC__) && defined(MNG_STRICT_ANSI)
#pragma option -A /* force ANSI-C */
#endif
/* ************************************************************************** */
#ifdef MNG_INCLUDE_ZLIB
/* ************************************************************************** */
voidpf mngzlib_alloc (voidpf pData,
uInt iCount,
uInt iSize)
{
voidpf pPtr; /* temporary space */
#ifdef MNG_INTERNAL_MEMMNGMT
pPtr = calloc (iCount, iSize); /* local allocation */
#else
if (((mng_datap)pData)->fMemalloc) /* callback function set ? */
pPtr = ((mng_datap)pData)->fMemalloc (iCount * iSize);
else
pPtr = Z_NULL; /* can't allocate! */
#endif
return pPtr; /* return the result */
}
/* ************************************************************************** */
void mngzlib_free (voidpf pData,
voidpf pAddress)
{
#ifdef MNG_INTERNAL_MEMMNGMT
free (pAddress); /* free locally */
#else
if (((mng_datap)pData)->fMemfree) /* callback set? */
((mng_datap)pData)->fMemfree (pAddress, 1);
#endif
}
/* ************************************************************************** */
mng_retcode mngzlib_initialize (mng_datap pData)
{
#ifdef MNG_SUPPORT_TRACE
MNG_TRACE (pData, MNG_FN_ZLIB_INITIALIZE, MNG_LC_START);
#endif
#ifdef MNG_INTERNAL_MEMMNGMT
pData->sZlib.zalloc = Z_NULL; /* let zlib figure out memory management */
pData->sZlib.zfree = Z_NULL;
pData->sZlib.opaque = Z_NULL;
#else /* use user-provided callbacks */
pData->sZlib.zalloc = mngzlib_alloc;
pData->sZlib.zfree = mngzlib_free;
pData->sZlib.opaque = (voidpf)pData;
#endif
pData->bInflating = MNG_FALSE; /* not performing any action yet */
pData->bDeflating = MNG_FALSE;
#ifdef MNG_SUPPORT_TRACE
MNG_TRACE (pData, MNG_FN_ZLIB_INITIALIZE, MNG_LC_END);
#endif
return MNG_NOERROR; /* done */
}
/* ************************************************************************** */
mng_retcode mngzlib_cleanup (mng_datap pData)
{
#ifdef MNG_SUPPORT_TRACE
MNG_TRACE (pData, MNG_FN_ZLIB_CLEANUP, MNG_LC_START);
#endif
if (pData->bInflating) /* force zlib cleanup */
mngzlib_inflatefree (pData);
if (pData->bDeflating)
mngzlib_deflatefree (pData);
#ifdef MNG_SUPPORT_TRACE
MNG_TRACE (pData, MNG_FN_ZLIB_CLEANUP, MNG_LC_END);
#endif
return MNG_NOERROR; /* done */
}
/* ************************************************************************** */
mng_retcode mngzlib_inflateinit (mng_datap pData)
{
int iZrslt;
#ifdef MNG_SUPPORT_TRACE
MNG_TRACE (pData, MNG_FN_ZLIB_INFLATEINIT, MNG_LC_START);
#endif
/* initialize zlib structures and such */
iZrslt = inflateInit (&pData->sZlib);
if (iZrslt != Z_OK) /* on error bail out */
MNG_ERRORZ (pData, (mng_uint32)iZrslt);
pData->bInflating = MNG_TRUE; /* really inflating something now */
pData->sZlib.next_out = 0; /* force JIT initialization */
#ifdef MNG_SUPPORT_TRACE
MNG_TRACE (pData, MNG_FN_ZLIB_INFLATEINIT, MNG_LC_END);
#endif
return MNG_NOERROR; /* done */
}
/* ************************************************************************** */
#ifdef MNG_SUPPORT_DISPLAY
mng_retcode mngzlib_inflaterows (mng_datap pData,
mng_uint32 iInlen,
mng_uint8p pIndata)
{
int iZrslt;
mng_retcode iRslt;
mng_ptr pSwap;
#ifdef MNG_SUPPORT_TRACE
MNG_TRACE (pData, MNG_FN_ZLIB_INFLATEROWS, MNG_LC_START);
#endif
pData->sZlib.next_in = pIndata; /* let zlib know where to get stuff */
pData->sZlib.avail_in = (uInt)iInlen;
if (pData->sZlib.next_out == 0) /* initialize output variables ? */
{ /* let zlib know where to store stuff */
pData->sZlib.next_out = pData->pWorkrow;
pData->sZlib.avail_out = (uInt)(pData->iRowsize + pData->iPixelofs);
#ifdef MNG_NO_1_2_4BIT_SUPPORT
if (pData->iPNGdepth < 8)
pData->sZlib.avail_out = (uInt)((pData->iPNGdepth*pData->iRowsize + 7)/8
+ pData->iPixelofs);
#endif
#ifdef MNG_NO_16BIT_SUPPORT
if (pData->iPNGdepth > 8)
pData->sZlib.avail_out = (uInt)(2*pData->iRowsize + pData->iPixelofs);
#endif
}
do
{ /* now inflate a row */
iZrslt = inflate (&pData->sZlib, Z_SYNC_FLUSH);
/* produced a full row ? */
if (((iZrslt == Z_OK) || (iZrslt == Z_STREAM_END)) &&
(pData->sZlib.avail_out == 0))
{ /* image not completed yet ? */
if (pData->iRow < (mng_int32)pData->iDataheight)
{
#ifdef MNG_NO_1_2_4BIT_SUPPORT
if (pData->iPNGdepth == 1)
{
/* Inflate Workrow to 8-bit */
mng_int32 iX;
mng_uint8p pSrc = pData->pWorkrow+1;
mng_uint8p pDest = pSrc + pData->iRowsize - (pData->iRowsize+7)/8;
for (iX = ((pData->iRowsize+7)/8) ; iX > 0 ; iX--)
*pDest++ = *pSrc++;
pDest = pData->pWorkrow+1;
pSrc = pDest + pData->iRowsize - (pData->iRowsize+7)/8;
for (iX = pData->iRowsize; ;)
{
*pDest++ = (((*pSrc)>>7)&1);
if (iX-- <= 0)
break;
*pDest++ = (((*pSrc)>>6)&1);
if (iX-- <= 0)
break;
*pDest++ = (((*pSrc)>>5)&1);
if (iX-- <= 0)
break;
*pDest++ = (((*pSrc)>>4)&1);
if (iX-- <= 0)
break;
*pDest++ = (((*pSrc)>>3)&1);
if (iX-- <= 0)
break;
*pDest++ = (((*pSrc)>>2)&1);
if (iX-- <= 0)
break;
*pDest++ = (((*pSrc)>>1)&1);
if (iX-- <= 0)
break;
*pDest++ = (((*pSrc) )&1);
if (iX-- <= 0)
break;
pSrc++;
}
}
else if (pData->iPNGdepth == 2)
{
/* Inflate Workrow to 8-bit */
mng_int32 iX;
mng_uint8p pSrc = pData->pWorkrow+1;
mng_uint8p pDest = pSrc + pData->iRowsize - (2*pData->iRowsize+7)/8;
for (iX = ((2*pData->iRowsize+7)/8) ; iX > 0 ; iX--)
*pDest++ = *pSrc++;
pDest = pData->pWorkrow+1;
pSrc = pDest + pData->iRowsize - (2*pData->iRowsize+7)/8;
for (iX = pData->iRowsize; ;)
{
*pDest++ = (((*pSrc)>>6)&3);
if (iX-- <= 0)
break;
*pDest++ = (((*pSrc)>>4)&3);
if (iX-- <= 0)
break;
*pDest++ = (((*pSrc)>>2)&3);
if (iX-- <= 0)
break;
*pDest++ = (((*pSrc) )&3);
if (iX-- <= 0)
break;
pSrc++;
}
}
else if (pData->iPNGdepth == 4)
{
/* Inflate Workrow to 8-bit */
mng_int32 iX;
mng_uint8p pSrc = pData->pWorkrow+1;
mng_uint8p pDest = pSrc + pData->iRowsize - (4*pData->iRowsize+7)/8;
for (iX = ((4*pData->iRowsize+7)/8) ; iX > 0 ; iX--)
*pDest++ = *pSrc++;
pDest = pData->pWorkrow+1;
pSrc = pDest + pData->iRowsize - (4*pData->iRowsize+7)/8;
for (iX = pData->iRowsize; ;)
{
*pDest++ = (((*pSrc)>>4)&0x0f);
if (iX-- <= 0)
break;
*pDest++ = (((*pSrc) )&0x0f);
if (iX-- <= 0)
break;
pSrc++;
}
}
if (pData->iPNGdepth < 8 && pData->iColortype == 0)
{
/* Expand samples to 8-bit by LBR */
mng_int32 iX;
mng_uint8p pSrc = pData->pWorkrow+1;
mng_uint8 multiplier[]={0,255,85,0,17,0,0,0,1};
for (iX = pData->iRowsize; iX > 0; iX--)
*pSrc++ *= multiplier[pData->iPNGdepth];
}
#endif
#ifdef MNG_NO_16BIT_SUPPORT
if (pData->iPNGdepth > 8)
{
/* Reduce Workrow to 8-bit */
mng_int32 iX;
mng_uint8p pSrc = pData->pWorkrow+1;
mng_uint8p pDest = pSrc;
for (iX = pData->iRowsize; iX > 0; iX--)
{
*pDest = *pSrc;
pDest++;
pSrc+=2;
}
}
#endif
#ifdef FILTER192 /* has leveling info ? */
if (pData->iFilterofs == MNG_FILTER_DIFFERING)
iRslt = init_rowdiffering (pData);
else
#endif
iRslt = MNG_NOERROR;
/* filter the row if necessary */
if ((!iRslt) && (pData->iFilterofs < pData->iPixelofs ) &&
(*(pData->pWorkrow + pData->iFilterofs)) )
iRslt = mng_filter_a_row (pData);
else
iRslt = MNG_NOERROR;
/* additional leveling/differing ? */
if ((!iRslt) && (pData->fDifferrow))
{
iRslt = ((mng_differrow)pData->fDifferrow) (pData);
pSwap = pData->pWorkrow;
pData->pWorkrow = pData->pPrevrow;
pData->pPrevrow = pSwap; /* make sure we're processing the right data */
}
if (!iRslt)
{
#ifdef MNG_INCLUDE_JNG
if (pData->bHasJHDR) /* is JNG alpha-channel ? */
{ /* just store in object ? */
if ((!iRslt) && (pData->fStorerow))
iRslt = ((mng_storerow)pData->fStorerow) (pData);
}
else
#endif /* MNG_INCLUDE_JNG */
{ /* process this row */
if ((!iRslt) && (pData->fProcessrow))
iRslt = ((mng_processrow)pData->fProcessrow) (pData);
/* store in object ? */
if ((!iRslt) && (pData->fStorerow))
iRslt = ((mng_storerow)pData->fStorerow) (pData);
/* color correction ? */
if ((!iRslt) && (pData->fCorrectrow))
iRslt = ((mng_correctrow)pData->fCorrectrow) (pData);
/* slap onto canvas ? */
if ((!iRslt) && (pData->fDisplayrow))
{
iRslt = ((mng_displayrow)pData->fDisplayrow) (pData);
if (!iRslt) /* check progressive display refresh */
iRslt = mng_display_progressive_check (pData);
}
}
}
if (iRslt) /* on error bail out */
MNG_ERROR (pData, iRslt);
if (!pData->fDifferrow) /* swap row-pointers */
{
pSwap = pData->pWorkrow;
pData->pWorkrow = pData->pPrevrow;
pData->pPrevrow = pSwap; /* so prev points to the processed row! */
}
iRslt = mng_next_row (pData); /* adjust variables for next row */
if (iRslt) /* on error bail out */
MNG_ERROR (pData, iRslt);
}
/* let zlib know where to store next output */
pData->sZlib.next_out = pData->pWorkrow;
pData->sZlib.avail_out = (uInt)(pData->iRowsize + pData->iPixelofs);
#ifdef MNG_NO_1_2_4BIT_SUPPORT
if (pData->iPNGdepth < 8)
pData->sZlib.avail_out = (uInt)((pData->iPNGdepth*pData->iRowsize + 7)/8
+ pData->iPixelofs);
#endif
#ifdef MNG_NO_16BIT_SUPPORT
if (pData->iPNGdepth > 8)
pData->sZlib.avail_out = (uInt)(2*pData->iRowsize + pData->iPixelofs);
#endif
}
} /* until some error or EOI
or all pixels received */
while ( (iZrslt == Z_OK) && (pData->sZlib.avail_in > 0) &&
( (pData->iRow < (mng_int32)pData->iDataheight) ||
( (pData->iPass >= 0) && (pData->iPass < 7) ) ) );
/* on error bail out */
if ((iZrslt != Z_OK) && (iZrslt != Z_STREAM_END))
MNG_ERRORZ (pData, (mng_uint32)iZrslt);
/* too much data ? */
if ((iZrslt == Z_OK) && (pData->sZlib.avail_in > 0))
MNG_WARNING (pData, MNG_TOOMUCHIDAT);
#ifdef MNG_SUPPORT_TRACE
MNG_TRACE (pData, MNG_FN_ZLIB_INFLATEROWS, MNG_LC_END);
#endif
return MNG_NOERROR;
}
#endif /* MNG_SUPPORT_DISPLAY */
/* ************************************************************************** */
mng_retcode mngzlib_inflatedata (mng_datap pData,
mng_uint32 iInlen,
mng_uint8p pIndata)
{
int iZrslt;
#ifdef MNG_SUPPORT_TRACE
MNG_TRACE (pData, MNG_FN_ZLIB_INFLATEDATA, MNG_LC_START);
#endif
/* let zlib know where to get stuff */
pData->sZlib.next_in = pIndata;
pData->sZlib.avail_in = (uInt)iInlen;
/* now inflate the data in one go! */
iZrslt = inflate (&pData->sZlib, Z_FINISH);
/* not enough room in output-buffer ? */
if ((iZrslt == Z_BUF_ERROR) || (pData->sZlib.avail_in > 0))
return MNG_BUFOVERFLOW;
/* on error bail out */
if ((iZrslt != Z_OK) && (iZrslt != Z_STREAM_END))
MNG_ERRORZ (pData, (mng_uint32)iZrslt);
#ifdef MNG_SUPPORT_TRACE
MNG_TRACE (pData, MNG_FN_ZLIB_INFLATEDATA, MNG_LC_END);
#endif
return MNG_NOERROR;
}
/* ************************************************************************** */
mng_retcode mngzlib_inflatefree (mng_datap pData)
{
int iZrslt;
#ifdef MNG_SUPPORT_TRACE
MNG_TRACE (pData, MNG_FN_ZLIB_INFLATEFREE, MNG_LC_START);
#endif
pData->bInflating = MNG_FALSE; /* stopped it */
iZrslt = inflateEnd (&pData->sZlib); /* let zlib cleanup its own stuff */
if (iZrslt != Z_OK) /* on error bail out */
MNG_ERRORZ (pData, (mng_uint32)iZrslt);
#ifdef MNG_SUPPORT_TRACE
MNG_TRACE (pData, MNG_FN_ZLIB_INFLATEFREE, MNG_LC_END);
#endif
return MNG_NOERROR; /* done */
}
/* ************************************************************************** */
mng_retcode mngzlib_deflateinit (mng_datap pData)
{
int iZrslt;
#ifdef MNG_SUPPORT_TRACE
MNG_TRACE (pData, MNG_FN_ZLIB_DEFLATEINIT, MNG_LC_START);
#endif
/* initialize zlib structures and such */
iZrslt = deflateInit2 (&pData->sZlib, pData->iZlevel, pData->iZmethod,
pData->iZwindowbits, pData->iZmemlevel,
pData->iZstrategy);
if (iZrslt != Z_OK) /* on error bail out */
MNG_ERRORZ (pData, (mng_uint32)iZrslt);
pData->bDeflating = MNG_TRUE; /* really deflating something now */
#ifdef MNG_SUPPORT_TRACE
MNG_TRACE (pData, MNG_FN_ZLIB_DEFLATEINIT, MNG_LC_END);
#endif
return MNG_NOERROR; /* done */
}
/* ************************************************************************** */
mng_retcode mngzlib_deflaterows (mng_datap pData,
mng_uint32 iInlen,
mng_uint8p pIndata)
{
#ifdef MNG_SUPPORT_TRACE
MNG_TRACE (pData, MNG_FN_ZLIB_DEFLATEROWS, MNG_LC_START);
#endif
#ifdef MNG_SUPPORT_TRACE
MNG_TRACE (pData, MNG_FN_ZLIB_DEFLATEROWS, MNG_LC_END);
#endif
return MNG_NOERROR;
}
/* ************************************************************************** */
mng_retcode mngzlib_deflatedata (mng_datap pData,
mng_uint32 iInlen,
mng_uint8p pIndata)
{
int iZrslt;
#ifdef MNG_SUPPORT_TRACE
MNG_TRACE (pData, MNG_FN_ZLIB_DEFLATEDATA, MNG_LC_START);
#endif
pData->sZlib.next_in = pIndata; /* let zlib know where to get stuff */
pData->sZlib.avail_in = (uInt)iInlen;
/* now deflate the data in one go! */
iZrslt = deflate (&pData->sZlib, Z_FINISH);
/* not enough room in output-buffer ? */
if ((iZrslt == Z_BUF_ERROR) || (pData->sZlib.avail_in > 0))
return MNG_BUFOVERFLOW;
/* on error bail out */
if ((iZrslt != Z_OK) && (iZrslt != Z_STREAM_END))
MNG_ERRORZ (pData, (mng_uint32)iZrslt);
#ifdef MNG_SUPPORT_TRACE
MNG_TRACE (pData, MNG_FN_ZLIB_DEFLATEDATA, MNG_LC_END);
#endif
return MNG_NOERROR;
}
/* ************************************************************************** */
mng_retcode mngzlib_deflatefree (mng_datap pData)
{
int iZrslt;
#ifdef MNG_SUPPORT_TRACE
MNG_TRACE (pData, MNG_FN_ZLIB_DEFLATEFREE, MNG_LC_START);
#endif
iZrslt = deflateEnd (&pData->sZlib); /* let zlib cleanup its own stuff */
if (iZrslt != Z_OK) /* on error bail out */
MNG_ERRORZ (pData, (mng_uint32)iZrslt);
pData->bDeflating = MNG_FALSE; /* stopped it */
#ifdef MNG_SUPPORT_TRACE
MNG_TRACE (pData, MNG_FN_ZLIB_DEFLATEFREE, MNG_LC_END);
#endif
return MNG_NOERROR; /* done */
}
/* ************************************************************************** */
#endif /* MNG_INCLUDE_ZLIB */
/* ************************************************************************** */
/* * end of file * */
/* ************************************************************************** */