source: trunk/src/3rdparty/libmng/libmng_data.h

Last change on this file was 2, checked in by dmik, 20 years ago

Imported xplatform parts of the official release 3.3.1 from Trolltech
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File size: 43.7 KB
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1/* ************************************************************************** */
2/* * For conditions of distribution and use, * */
3/* * see copyright notice in libmng.h * */
4/* ************************************************************************** */
5/* * * */
6/* * project : libmng * */
7/* * file : libmng_data.h copyright (c) 2000 G.Juyn * */
8/* * version : 1.0.2 * */
9/* * * */
10/* * purpose : main data structure definition * */
11/* * * */
12/* * author : G.Juyn * */
13/* * web : http://www.3-t.com * */
14/* * email : mailto:info@3-t.com * */
15/* * * */
16/* * comment : Definition of the library main data structure * */
17/* * * */
18/* * changes : 0.5.1 - 05/04/2000 - G.Juyn * */
19/* * - added CRC table to main structure (for thread-safety) * */
20/* * 0.5.1 - 05/06/2000 - G.Juyn * */
21/* * - added iPLTEentries for checking hIST-length * */
22/* * 0.5.1 - 05/08/2000 - G.Juyn * */
23/* * - changed palette definition to exported palette-type * */
24/* * - removed frozen indicator * */
25/* * - added create/write indicators * */
26/* * - changed strict-ANSI stuff * */
27/* * 0.5.1 - 05/13/2000 - G.Juyn * */
28/* * - added eMNGma hack (will be removed in 1.0.0 !!!) * */
29/* * - added TERM animation object pointer (easier reference) * */
30/* * - added saved-data structure for SAVE/SEEK processing * */
31/* * * */
32/* * 0.5.2 - 05/18/2000 - G.Juyn * */
33/* * - added fields for JNG support (IJG-based) * */
34/* * 0.5.2 - 05/24/2000 - G.Juyn * */
35/* * - changed global tRNS definition * */
36/* * 0.5.2 - 05/30/2000 - G.Juyn * */
37/* * - added delta-image fields * */
38/* * 0.5.2 - 06/01/2000 - G.Juyn * */
39/* * - added internal delta-image processing callbacks * */
40/* * 0.5.2 - 06/02/2000 - G.Juyn * */
41/* * - changed SWAP_ENDIAN to BIGENDIAN_SUPPORTED * */
42/* * (contributed by Tim Rowley) * */
43/* * - added getalphaline callback for RGB8_A8 canvasstyle * */
44/* * 0.5.2 - 06/06/2000 - G.Juyn * */
45/* * - added parameter for delayed buffer-processing * */
46/* * * */
47/* * 0.5.3 - 06/16/2000 - G.Juyn * */
48/* * - added update-region parms for refresh calback * */
49/* * - added Needrefresh parameter * */
50/* * 0.5.3 - 06/17/2000 - G.Juyn * */
51/* * - added Deltaimmediate parm for faster delta-processing * */
52/* * 0.5.3 - 06/21/2000 - G.Juyn * */
53/* * - added Speed parameter to facilitate testing * */
54/* * - added Imagelevel parameter for processtext callback * */
55/* * 0.5.3 - 06/26/2000 - G.Juyn * */
56/* * - changed userdata variable to mng_ptr * */
57/* * * */
58/* * 0.9.1 - 07/07/2000 - G.Juyn * */
59/* * - added variables for go_xxxx processing * */
60/* * 0.9.1 - 07/08/2000 - G.Juyn * */
61/* * - added variables for improved timing support * */
62/* * 0.9.1 - 07/15/2000 - G.Juyn * */
63/* * - added callbacks for SAVE/SEEK processing * */
64/* * - added variable for NEEDSECTIONWAIT breaks * */
65/* * - added variable for freeze & reset processing * */
66/* * 0.9.1 - 07/17/2000 - G.Juyn * */
67/* * - fixed suspension-buffering for 32K+ chunks * */
68/* * * */
69/* * 0.9.2 - 07/29/2000 - G.Juyn * */
70/* * - removed Nextbackxxx fields (no longer used) * */
71/* * 0.9.2 - 07/31/2000 - G.Juyn * */
72/* * - fixed wrapping of suspension parameters * */
73/* * 0.9.2 - 08/04/2000 - G.Juyn * */
74/* * - B111096 - fixed large-buffer read-suspension * */
75/* * 0.9.2 - 08/05/2000 - G.Juyn * */
76/* * - changed file-prefixes * */
77/* * * */
78/* * 0.9.3 - 08/26/2000 - G.Juyn * */
79/* * - added MAGN chunk * */
80/* * 0.9.3 - 09/07/2000 - G.Juyn * */
81/* * - added support for new filter_types * */
82/* * 0.9.3 - 09/10/2000 - G.Juyn * */
83/* * - fixed DEFI behavior * */
84/* * 0.9.3 - 10/10/2000 - G.Juyn * */
85/* * - added support for alpha-depth prediction * */
86/* * 0.9.3 - 10/11/2000 - G.Juyn * */
87/* * - added support for nEED * */
88/* * 0.9.3 - 10/16/2000 - G.Juyn * */
89/* * - added optional support for bKGD for PNG images * */
90/* * - added support for JDAA * */
91/* * 0.9.3 - 10/17/2000 - G.Juyn * */
92/* * - added callback to process non-critical unknown chunks * */
93/* * - fixed support for bKGD * */
94/* * 0.9.3 - 10/19/2000 - G.Juyn * */
95/* * - implemented delayed delta-processing * */
96/* * 0.9.4 - 12/16/2000 - G.Juyn * */
97/* * - fixed mixup of data- & function-pointers (thanks Dimitri)* */
98/* * * */
99/* * 1.0.1 - 02/08/2001 - G.Juyn * */
100/* * - added MEND processing callback * */
101/* * 1.0.1 - 02/13/2001 - G.Juyn * */
102/* * - fixed first FRAM_MODE=4 timing problem * */
103/* * * */
104/* * 1.0.2 - 06/23/2001 - G.Juyn * */
105/* * - added optimization option for MNG-video playback * */
106/* * - added processterm callback * */
107/* * 1.0.2 - 06/25/2001 - G.Juyn * */
108/* * - added option to turn off progressive refresh * */
109/* * * */
110/* ************************************************************************** */
111
112#if defined(__BORLANDC__) && defined(MNG_STRICT_ANSI)
113#pragma option -A /* force ANSI-C */
114#endif
115
116#ifndef _libmng_data_h_
117#define _libmng_data_h_
118
119/* ************************************************************************** */
120
121#define MNG_MAGIC 0x52530a0aL
122
123/* ************************************************************************** */
124/* * * */
125/* * Internal structures * */
126/* * * */
127/* ************************************************************************** */
128
129typedef mng_palette8 mng_rgbpaltab;
130
131/* ************************************************************************** */
132/* * * */
133/* * The saved_data structure * */
134/* * * */
135/* * This contains the saved data after a SAVE chunk has been processed. * */
136/* * The data is saved from the main data structure during SAVE processing, * */
137/* * and restored to the main data structure during SEEK processing. * */
138/* * * */
139/* ************************************************************************** */
140
141typedef struct mng_savedata_struct {
142
143#if defined(MNG_SUPPORT_READ) || defined(MNG_SUPPORT_WRITE)
144 mng_bool bHasglobalPLTE; /* global PLTE chunk processed */
145 mng_bool bHasglobalTRNS; /* global tRNS chunk processed */
146 mng_bool bHasglobalGAMA; /* global gAMA chunk processed */
147 mng_bool bHasglobalCHRM; /* global cHRM chunk processed */
148 mng_bool bHasglobalSRGB; /* global sRGB chunk processed */
149 mng_bool bHasglobalICCP; /* global iCCP chunk processed */
150 mng_bool bHasglobalBKGD; /* global bKGD chunk processed */
151#endif /* MNG_SUPPORT_READ || MNG_SUPPORT_WRITE */
152
153#ifdef MNG_SUPPORT_DISPLAY
154 mng_uint16 iBACKred; /* BACK fields */
155 mng_uint16 iBACKgreen;
156 mng_uint16 iBACKblue;
157 mng_uint8 iBACKmandatory;
158 mng_uint16 iBACKimageid;
159 mng_uint8 iBACKtile;
160
161 mng_uint8 iFRAMmode; /* FRAM fields (global) */
162 mng_uint32 iFRAMdelay;
163 mng_uint32 iFRAMtimeout;
164 mng_bool bFRAMclipping;
165 mng_int32 iFRAMclipl;
166 mng_int32 iFRAMclipr;
167 mng_int32 iFRAMclipt;
168 mng_int32 iFRAMclipb;
169
170 mng_uint32 iGlobalPLTEcount; /* global PLTE fields */
171 mng_rgbpaltab aGlobalPLTEentries;
172
173 mng_uint32 iGlobalTRNSrawlen; /* global tRNS fields */
174 mng_uint8arr aGlobalTRNSrawdata;
175
176 mng_uint32 iGlobalGamma; /* global gAMA fields */
177
178 mng_uint32 iGlobalWhitepointx; /* global cHRM fields */
179 mng_uint32 iGlobalWhitepointy;
180 mng_uint32 iGlobalPrimaryredx;
181 mng_uint32 iGlobalPrimaryredy;
182 mng_uint32 iGlobalPrimarygreenx;
183 mng_uint32 iGlobalPrimarygreeny;
184 mng_uint32 iGlobalPrimarybluex;
185 mng_uint32 iGlobalPrimarybluey;
186
187 mng_uint8 iGlobalRendintent; /* global sRGB fields */
188
189 mng_uint32 iGlobalProfilesize; /* global iCCP fields */
190 mng_ptr pGlobalProfile;
191
192 mng_uint16 iGlobalBKGDred; /* global bKGD fields */
193 mng_uint16 iGlobalBKGDgreen;
194 mng_uint16 iGlobalBKGDblue;
195#endif /* MNG_SUPPORT_DISPLAY */
196
197 } mng_savedata;
198
199typedef mng_savedata * mng_savedatap;
200
201/* ************************************************************************** */
202/* * * */
203/* * The main libmng data structure * */
204/* * * */
205/* * The handle used in all functions points to this structure which * */
206/* * contains all volatile data necessary to process the network graphic. * */
207/* * * */
208/* ************************************************************************** */
209
210typedef struct mng_data_struct {
211
212 mng_uint32 iMagic; /* magic number to validate
213 a given handle */
214 mng_ptr pUserdata; /* application workdata */
215
216 mng_imgtype eSigtype; /* image information */
217 mng_imgtype eImagetype; /* initially zeroed */
218 mng_uint32 iWidth; /* filled after header is processed */
219 mng_uint32 iHeight;
220 mng_uint32 iTicks; /* these only after MHDR */
221 mng_uint32 iLayercount;
222 mng_uint32 iFramecount;
223 mng_uint32 iPlaytime;
224 mng_uint32 iSimplicity;
225 mng_uint8 iAlphadepth; /* indicates expected alpha-depth */
226
227 mng_uint32 iImagelevel; /* level an image inside a stream */
228
229 mng_uint32 iCanvasstyle; /* layout of the drawing-canvas */
230 mng_uint32 iBkgdstyle; /* layout of the background-canvas */
231
232 mng_int8 iMagnify; /* magnification factor (not used yet) */
233 mng_uint32 iOffsetx; /* x-offset for extremely large image */
234 mng_uint32 iOffsety; /* y-offset for extremely large image */
235 mng_uint32 iCanvaswidth; /* real canvas size */
236 mng_uint32 iCanvasheight; /* must be set by processheader callback */
237
238 mng_uint16 iBGred; /* default background color */
239 mng_uint16 iBGgreen; /* initially "black" */
240 mng_uint16 iBGblue;
241 mng_bool bUseBKGD; /* preferred use of bKGD for PNG */
242
243 mng_bool bIssRGB; /* indicates sRGB system */
244
245#ifdef MNG_FULL_CMS /* little CMS variables */
246 mng_cmsprof hProf1; /* image input profile */
247 mng_cmsprof hProf2; /* default output profile */
248 mng_cmsprof hProf3; /* default sRGB profile */
249 mng_cmstrans hTrans; /* current transformation handle */
250#endif
251
252 mng_float dViewgamma; /* gamma calculation variables */
253 mng_float dDisplaygamma; /* initially set for sRGB conditions */
254 mng_float dDfltimggamma;
255
256 mng_bool bStorechunks; /* switch for storing chunkdata */
257 mng_bool bSectionbreaks; /* indicate NEEDSECTIONWAIT breaks */
258 mng_bool bCacheplayback; /* switch to cache playback info */
259 mng_bool bDoProgressive; /* progressive refresh for large images */
260
261 mng_speedtype iSpeed; /* speed-modifier for animations */
262
263 mng_uint32 iMaxwidth; /* maximum canvas size */
264 mng_uint32 iMaxheight; /* initially set to 1024 x 1024 */
265
266 mng_int32 iErrorcode; /* error reporting fields */
267 mng_int8 iSeverity;
268 mng_int32 iErrorx1;
269 mng_int32 iErrorx2;
270 mng_pchar zErrortext;
271
272 mng_memalloc fMemalloc; /* callback pointers */
273 mng_memfree fMemfree; /* initially nulled */
274 mng_openstream fOpenstream;
275 mng_closestream fClosestream;
276 mng_readdata fReaddata;
277 mng_writedata fWritedata;
278 mng_errorproc fErrorproc;
279 mng_traceproc fTraceproc;
280 mng_processheader fProcessheader;
281 mng_processtext fProcesstext;
282 mng_processsave fProcesssave;
283 mng_processseek fProcessseek;
284 mng_processneed fProcessneed;
285 mng_processmend fProcessmend;
286 mng_processunknown fProcessunknown;
287 mng_processterm fProcessterm;
288 mng_getcanvasline fGetcanvasline;
289 mng_getbkgdline fGetbkgdline;
290 mng_getalphaline fGetalphaline;
291 mng_refresh fRefresh;
292 mng_gettickcount fGettickcount;
293 mng_settimer fSettimer;
294 mng_processgamma fProcessgamma;
295 mng_processchroma fProcesschroma;
296 mng_processsrgb fProcesssrgb;
297 mng_processiccp fProcessiccp;
298 mng_processarow fProcessarow;
299
300#if defined(MNG_SUPPORT_READ) || defined(MNG_SUPPORT_WRITE)
301 mng_bool bPreDraft48; /* flags ancient style draft */
302
303 mng_chunkid iChunkname; /* read/write-state variables */
304 mng_uint32 iChunkseq;
305 mng_chunkp pFirstchunk; /* double-linked list of */
306 mng_chunkp pLastchunk; /* stored chunk-structures */
307
308 mng_bool bHasheader; /* first header chunk processed */
309 mng_bool bHasMHDR; /* inside a MHDR-MEND sequence */
310 mng_bool bHasIHDR; /* inside a IHDR-IEND sequence */
311 mng_bool bHasBASI; /* inside a BASI-IEND sequence */
312 mng_bool bHasDHDR; /* inside a DHDR-IEND sequence */
313#ifdef MNG_INCLUDE_JNG
314 mng_bool bHasJHDR; /* inside a JHDR-IEND sequence */
315 mng_bool bHasJSEP; /* passed the JSEP separator */
316 mng_bool bHasJDAA; /* at least 1 JDAA processed */
317 mng_bool bHasJDAT; /* at least 1 JDAT processed */
318#endif
319 mng_bool bHasPLTE; /* PLTE chunk processed */
320 mng_bool bHasTRNS; /* tRNS chunk processed */
321 mng_bool bHasGAMA; /* gAMA chunk processed */
322 mng_bool bHasCHRM; /* cHRM chunk processed */
323 mng_bool bHasSRGB; /* sRGB chunk processed */
324 mng_bool bHasICCP; /* iCCP chunk processed */
325 mng_bool bHasBKGD; /* bKGD chunk processed */
326 mng_bool bHasIDAT; /* at least 1 IDAT processed */
327
328 mng_bool bHasSAVE; /* SAVE chunk processed */
329 mng_bool bHasBACK; /* BACK chunk processed */
330 mng_bool bHasFRAM; /* FRAM chunk processed */
331 mng_bool bHasTERM; /* TERM chunk processed */
332 mng_bool bHasLOOP; /* at least 1 LOOP open */
333
334 mng_bool bHasglobalPLTE; /* global PLTE chunk processed */
335 mng_bool bHasglobalTRNS; /* global tRNS chunk processed */
336 mng_bool bHasglobalGAMA; /* global gAMA chunk processed */
337 mng_bool bHasglobalCHRM; /* global cHRM chunk processed */
338 mng_bool bHasglobalSRGB; /* global sRGB chunk processed */
339 mng_bool bHasglobalICCP; /* global iCCP chunk processed */
340 mng_bool bHasglobalBKGD; /* global bKGD chunk processed */
341
342 mng_uint32 iDatawidth; /* IHDR/BASI/DHDR fields */
343 mng_uint32 iDataheight; /* valid if inside IHDR-IEND, */
344 mng_uint8 iBitdepth; /* BASI-IEND or DHDR-IEND */
345 mng_uint8 iColortype;
346 mng_uint8 iCompression;
347 mng_uint8 iFilter;
348 mng_uint8 iInterlace;
349
350 mng_uint32 iPLTEcount; /* PLTE fields */
351
352 mng_bool bEMNGMAhack; /* TODO: to be removed in 1.0.0 !!! */
353
354#ifdef MNG_INCLUDE_JNG
355 mng_uint8 iJHDRcolortype; /* JHDR fields */
356 mng_uint8 iJHDRimgbitdepth; /* valid if inside JHDR-IEND */
357 mng_uint8 iJHDRimgcompression;
358 mng_uint8 iJHDRimginterlace;
359 mng_uint8 iJHDRalphabitdepth;
360 mng_uint8 iJHDRalphacompression;
361 mng_uint8 iJHDRalphafilter;
362 mng_uint8 iJHDRalphainterlace;
363#endif
364
365#endif /* MNG_SUPPORT_READ || MNG_SUPPORT_WRITE */
366
367#ifdef MNG_SUPPORT_READ
368 mng_bool bReading; /* read processing variables */
369 mng_bool bHavesig;
370 mng_bool bEOF;
371 mng_uint32 iReadbufsize;
372 mng_uint8p pReadbuf;
373
374 mng_uint32 iLargebufsize; /* temp for very large chunks */
375 mng_uint8p pLargebuf;
376
377 mng_uint32 iSuspendtime; /* tickcount at last suspension */
378 mng_bool bSuspended; /* input-reading has been suspended;
379 we're expecting a call to
380 mng_read_resume! */
381 mng_uint8 iSuspendpoint; /* indicates at which point the flow
382 was broken to suspend input-reading */
383
384 mng_bool bSuspensionmode; /* I/O-suspension variables */
385 mng_uint32 iSuspendbufsize;
386 mng_uint8p pSuspendbuf;
387 mng_uint8p pSuspendbufnext;
388 mng_uint32 iSuspendbufleft;
389 mng_uint32 iChunklen; /* chunk length */
390 mng_uint8p pReadbufnext; /* 32K+ suspension-processing */
391#endif /* MNG_SUPPORT_READ */
392
393#ifdef MNG_SUPPORT_WRITE
394 mng_bool bCreating; /* create/write processing variables */
395 mng_bool bWriting;
396 mng_chunkid iFirstchunkadded;
397 mng_uint32 iWritebufsize;
398 mng_uint8p pWritebuf;
399#endif
400
401#ifdef MNG_SUPPORT_DISPLAY
402 mng_bool bDisplaying; /* display-state variables */
403 mng_bool bFramedone;
404 mng_uint32 iFrameseq;
405 mng_uint32 iLayerseq;
406 mng_uint32 iFrametime; /* millisecs */
407
408 mng_uint32 iRequestframe; /* go_xxxx variables */
409 mng_uint32 iRequestlayer;
410 mng_uint32 iRequesttime;
411 mng_bool bSearching;
412
413 mng_bool bRestorebkgd; /* flags restore required before IDAT/JDAT */
414
415 mng_uint32 iRuntime; /* millisecs since start */
416 mng_uint32 iSynctime; /* tickcount at last framesync */
417 mng_uint32 iStarttime; /* tickcount at start */
418 mng_uint32 iEndtime; /* tickcount at end */
419 mng_bool bRunning; /* animation is active */
420 mng_bool bTimerset; /* the timer has been set;
421 we're expecting a call to
422 mng_display_resume! */
423 mng_uint8 iBreakpoint; /* indicates at which point the
424 flow was broken to run the timer */
425 mng_bool bSectionwait; /* indicates a section break */
426 mng_bool bFreezing; /* indicates app requested a freeze */
427 mng_bool bResetting; /* indicates app requested a reset */
428 mng_bool bNeedrefresh; /* indicates screen-refresh is needed */
429 mng_objectp pCurrentobj; /* current "object" */
430 mng_objectp pCurraniobj; /* current animation object
431 "to be"/"being" processed */
432 mng_objectp pTermaniobj; /* TERM animation object */
433 mng_uint32 iIterations; /* TERM/MEND iteration count */
434 mng_objectp pObjzero; /* "on-the-fly" image (object = 0) */
435 mng_objectp pLastclone; /* last clone */
436 mng_objectp pStoreobj; /* current store object for row routines */
437 mng_objectp pStorebuf; /* current store object-buffer for row routines */
438 mng_objectp pRetrieveobj; /* current retrieve object for row routines */
439 mng_savedatap pSavedata; /* pointer to saved data (after SAVE) */
440
441 mng_uint32 iUpdateleft; /* update region for refresh */
442 mng_uint32 iUpdateright;
443 mng_uint32 iUpdatetop;
444 mng_uint32 iUpdatebottom;
445
446 mng_int8 iPass; /* current interlacing pass;
447 negative value means no interlace */
448 mng_int32 iRow; /* current row counter */
449 mng_int32 iRowinc; /* row increment for this pass */
450 mng_int32 iCol; /* current starting column */
451 mng_int32 iColinc; /* column increment for this pass */
452 mng_int32 iRowsamples; /* nr. of samples in current workrow */
453 mng_int32 iSamplemul; /* needed to calculate rowsize */
454 mng_int32 iSampleofs; /* from rowsamples */
455 mng_int32 iSamplediv;
456 mng_int32 iRowsize; /* size of actual data in work row */
457 mng_int32 iRowmax; /* maximum size of data in work row */
458 mng_int32 iFilterofs; /* offset to filter-byte in work row */
459 mng_int32 iPixelofs; /* offset to pixel-bytes in work row */
460 mng_uint32 iLevel0; /* leveling variables */
461 mng_uint32 iLevel1;
462 mng_uint32 iLevel2;
463 mng_uint32 iLevel3;
464 mng_uint8p pWorkrow; /* working row of pixel-data */
465 mng_uint8p pPrevrow; /* previous row of pixel-data */
466 mng_uint8p pRGBArow; /* intermediate row of RGBA8 or RGBA16 data */
467 mng_bool bIsRGBA16; /* indicates intermediate row is RGBA16 */
468 mng_bool bIsOpaque; /* indicates intermediate row is fully opaque */
469 mng_int32 iFilterbpp; /* bpp index for filtering routines */
470
471 mng_int32 iSourcel; /* variables for showing objects */
472 mng_int32 iSourcer;
473 mng_int32 iSourcet;
474 mng_int32 iSourceb;
475 mng_int32 iDestl;
476 mng_int32 iDestr;
477 mng_int32 iDestt;
478 mng_int32 iDestb;
479
480 mng_objectp pFirstimgobj; /* double-linked list of */
481 mng_objectp pLastimgobj; /* image-object structures */
482 mng_objectp pFirstaniobj; /* double-linked list of */
483 mng_objectp pLastaniobj; /* animation-object structures */
484
485#if defined(MNG_GAMMA_ONLY) || defined(MNG_FULL_CMS)
486 mng_uint8 aGammatab[256]; /* precomputed gamma lookup table */
487 mng_float dLastgamma; /* last gamma used to compute table */
488#endif
489
490 mng_fptr fDisplayrow; /* internal callback to display an
491 uncompressed/unfiltered/
492 color-corrected row */
493 mng_fptr fRestbkgdrow; /* internal callback for restore-
494 background processing of a row */
495 mng_fptr fCorrectrow; /* internal callback to color-correct an
496 uncompressed/unfiltered row */
497 mng_fptr fRetrieverow; /* internal callback to retrieve an
498 uncompressed/unfiltered row of data */
499 mng_fptr fStorerow; /* internal callback to store an
500 uncompressed/unfiltered row of data */
501 mng_fptr fProcessrow; /* internal callback to process an
502 uncompressed row of data */
503 mng_fptr fDifferrow; /* internal callback to perform
504 added filter leveling and
505 differing on an unfiltered row */
506 mng_fptr fScalerow; /* internal callback to scale a
507 delta-row to the bitdepth of its target */
508 mng_fptr fDeltarow; /* internal callback to execute a
509 delta-row onto a target */
510 mng_fptr fInitrowproc; /* internal callback to initialize
511 the row processing */
512
513 mng_uint16 iDEFIobjectid; /* DEFI fields */
514 mng_bool bDEFIhasdonotshow;
515 mng_uint8 iDEFIdonotshow;
516 mng_bool bDEFIhasconcrete;
517 mng_uint8 iDEFIconcrete;
518 mng_bool bDEFIhasloca;
519 mng_int32 iDEFIlocax;
520 mng_int32 iDEFIlocay;
521 mng_bool bDEFIhasclip;
522 mng_int32 iDEFIclipl;
523 mng_int32 iDEFIclipr;
524 mng_int32 iDEFIclipt;
525 mng_int32 iDEFIclipb;
526
527 mng_uint16 iBACKred; /* BACK fields */
528 mng_uint16 iBACKgreen;
529 mng_uint16 iBACKblue;
530 mng_uint8 iBACKmandatory;
531 mng_uint16 iBACKimageid;
532 mng_uint8 iBACKtile;
533
534 mng_uint8 iFRAMmode; /* FRAM fields (global) */
535 mng_uint32 iFRAMdelay;
536 mng_uint32 iFRAMtimeout;
537 mng_bool bFRAMclipping;
538 mng_int32 iFRAMclipl;
539 mng_int32 iFRAMclipr;
540 mng_int32 iFRAMclipt;
541 mng_int32 iFRAMclipb;
542
543 mng_uint8 iFramemode; /* current subframe variables */
544 mng_uint32 iFramedelay;
545 mng_uint32 iFrametimeout;
546 mng_bool bFrameclipping;
547 mng_int32 iFrameclipl;
548 mng_int32 iFrameclipr;
549 mng_int32 iFrameclipt;
550 mng_int32 iFrameclipb;
551
552 mng_uint32 iNextdelay; /* delay for *after* next image */
553
554 mng_uint8 iSHOWmode; /* SAVE fields */
555 mng_uint16 iSHOWfromid;
556 mng_uint16 iSHOWtoid;
557 mng_uint16 iSHOWnextid;
558 mng_int16 iSHOWskip;
559
560 mng_uint32 iGlobalPLTEcount; /* global PLTE fields */
561 mng_rgbpaltab aGlobalPLTEentries;
562
563 mng_uint32 iGlobalTRNSrawlen; /* global tRNS fields */
564 mng_uint8arr aGlobalTRNSrawdata;
565
566 mng_uint32 iGlobalGamma; /* global gAMA fields */
567
568 mng_uint32 iGlobalWhitepointx; /* global cHRM fields */
569 mng_uint32 iGlobalWhitepointy;
570 mng_uint32 iGlobalPrimaryredx;
571 mng_uint32 iGlobalPrimaryredy;
572 mng_uint32 iGlobalPrimarygreenx;
573 mng_uint32 iGlobalPrimarygreeny;
574 mng_uint32 iGlobalPrimarybluex;
575 mng_uint32 iGlobalPrimarybluey;
576
577 mng_uint8 iGlobalRendintent; /* global sRGB fields */
578
579 mng_uint32 iGlobalProfilesize; /* global iCCP fields */
580 mng_ptr pGlobalProfile;
581
582 mng_uint16 iGlobalBKGDred; /* global bKGD fields */
583 mng_uint16 iGlobalBKGDgreen;
584 mng_uint16 iGlobalBKGDblue;
585
586 mng_ptr pDeltaImage; /* delta-image fields */
587 mng_uint8 iDeltaImagetype;
588 mng_uint8 iDeltatype;
589 mng_uint32 iDeltaBlockwidth;
590 mng_uint32 iDeltaBlockheight;
591 mng_uint32 iDeltaBlockx;
592 mng_uint32 iDeltaBlocky;
593 mng_bool bDeltaimmediate;
594
595 mng_fptr fDeltagetrow; /* internal delta-proc callbacks */
596 mng_fptr fDeltaaddrow;
597 mng_fptr fDeltareplacerow;
598 mng_fptr fDeltaputrow;
599
600 mng_uint16 iMAGNfromid;
601 mng_uint16 iMAGNtoid;
602#endif /* MNG_SUPPORT_DISPLAY */
603
604#ifdef MNG_INCLUDE_ZLIB
605 z_stream sZlib; /* zlib (de)compression variables */
606
607 mng_int32 iZlevel; /* zlib compression parameters */
608 mng_int32 iZmethod;
609 mng_int32 iZwindowbits;
610 mng_int32 iZmemlevel;
611 mng_int32 iZstrategy;
612
613 mng_uint32 iMaxIDAT; /* maximum size of IDAT data */
614
615 mng_bool bInflating; /* indicates "inflate" in progress */
616 mng_bool bDeflating; /* indicates "deflate" in progress */
617#endif /* MNG_INCLUDE_ZLIB */
618
619#ifdef MNG_INCLUDE_JNG
620 mngjpeg_dctmethod eJPEGdctmethod; /* IJG compression variables */
621 mng_int32 iJPEGquality;
622 mng_int32 iJPEGsmoothing;
623 mng_bool bJPEGcompressprogr;
624 mng_bool bJPEGcompressopt;
625
626 mng_uint32 iMaxJDAT; /* maximum size of JDAT/JDAA data */
627
628 mngjpeg_compp pJPEGcinfo; /* compression structure */
629 mngjpeg_errorp pJPEGcerr; /* error-manager compress */
630
631 mngjpeg_decompp pJPEGdinfo; /* decompression structure (JDAT) */
632 mngjpeg_errorp pJPEGderr; /* error-manager decompress (JDAT) */
633 mngjpeg_sourcep pJPEGdsrc; /* source-manager decompress (JDAT) */
634
635 mngjpeg_decompp pJPEGdinfo2; /* decompression structure (JDAA) */
636 mngjpeg_errorp pJPEGderr2; /* error-manager decompress (JDAA) */
637 mngjpeg_sourcep pJPEGdsrc2; /* source-manager decompress (JDAA) */
638
639 mng_uint8p pJPEGbuf; /* buffer for JPEG (de)compression (JDAT) */
640 mng_uint32 iJPEGbufmax; /* allocated space for buffer (JDAT) */
641 mng_uint8p pJPEGcurrent; /* current pointer into buffer (JDAT) */
642 mng_uint32 iJPEGbufremain; /* remaining bytes in buffer (JDAT) */
643 mng_uint32 iJPEGtoskip; /* bytes to skip on next input-block (JDAT) */
644
645 mng_uint8p pJPEGbuf2; /* buffer for JPEG (de)compression (JDAA) */
646 mng_uint32 iJPEGbufmax2; /* allocated space for buffer (JDAA) */
647 mng_uint8p pJPEGcurrent2; /* current pointer into buffer (JDAA) */
648 mng_uint32 iJPEGbufremain2; /* remaining bytes in buffer (JDAA) */
649 mng_uint32 iJPEGtoskip2; /* bytes to skip on next input-block (JDAA) */
650
651 mng_uint8p pJPEGrow; /* buffer for a JPEG row of samples (JDAT) */
652 mng_uint32 iJPEGrowlen;
653
654 mng_uint8p pJPEGrow2; /* buffer for a JPEG row of samples (JDAA) */
655 mng_uint32 iJPEGrowlen2;
656
657 mng_bool bJPEGcompress; /* indicates "compress" initialized */
658
659 mng_bool bJPEGdecompress; /* indicates "decompress" initialized (JDAT) */
660 mng_bool bJPEGhasheader; /* indicates "readheader" succeeded (JDAT) */
661 mng_bool bJPEGdecostarted; /* indicates "decompress" started (JDAT) */
662 mng_bool bJPEGscanstarted; /* indicates "first scan" started (JDAT) */
663 mng_bool bJPEGprogressive; /* indicates a progressive image (JDAT) */
664
665 mng_bool bJPEGdecompress2; /* indicates "decompress" initialized (JDAA) */
666 mng_bool bJPEGhasheader2; /* indicates "readheader" succeeded (JDAA) */
667 mng_bool bJPEGdecostarted2; /* indicates "decompress" started (JDAA) */
668 mng_bool bJPEGscanstarted2; /* indicates "first scan" started (JDAA) */
669 mng_bool bJPEGprogressive2; /* indicates a progressive image (JDAA) */
670
671 mng_fptr fStorerow2; /* internal callback to store an
672 uncompressed/unfiltered row of JPEG-data (JDAT) */
673
674 mng_fptr fStorerow3; /* internal callback to store an
675 uncompressed/unfiltered row of JPEG-data (JDAA) */
676
677 mng_uint32 iJPEGrow; /* row-number for current JPEG row */
678 mng_uint32 iJPEGalpharow; /* nr. of rows filled with alpha */
679 mng_uint32 iJPEGrgbrow; /* nr. of rows filled with 'color'-info */
680 mng_uint32 iJPEGdisprow; /* nr. of rows already displayed "on-the-fly" */
681
682#if defined(MNG_USE_SETJMP) && defined (MNG_INCLUDE_IJG6B)
683 jmp_buf sErrorbuf; /* setjmp/longjmp buffer (error-recovery) */
684#endif
685
686#endif /* MNG_INCLUDE_JNG */
687
688 mng_uint32 aCRCtable [256]; /* CRC prefab table */
689 mng_bool bCRCcomputed; /* "has been build" indicator */
690
691 } mng_data;
692
693typedef mng_data * mng_datap;
694
695/* ************************************************************************** */
696/* * * */
697/* * Internal Callback-Function prototypes * */
698/* * * */
699/* ************************************************************************** */
700
701typedef mng_retcode(*mng_displayrow) (mng_datap pData);
702typedef mng_retcode(*mng_restbkgdrow) (mng_datap pData);
703typedef mng_retcode(*mng_correctrow) (mng_datap pData);
704typedef mng_retcode(*mng_retrieverow) (mng_datap pData);
705typedef mng_retcode(*mng_storerow) (mng_datap pData);
706typedef mng_retcode(*mng_processrow) (mng_datap pData);
707typedef mng_retcode(*mng_initrowproc) (mng_datap pData);
708typedef mng_retcode(*mng_differrow) (mng_datap pData);
709typedef mng_retcode(*mng_scalerow) (mng_datap pData);
710typedef mng_retcode(*mng_deltarow) (mng_datap pData);
711
712typedef mng_retcode(*mng_magnify_x) (mng_datap pData,
713 mng_uint16 iMX,
714 mng_uint16 iML,
715 mng_uint16 iMR,
716 mng_uint32 iWidth,
717 mng_uint8p iSrcline,
718 mng_uint8p iDstline);
719typedef mng_retcode(*mng_magnify_y) (mng_datap pData,
720 mng_int32 iM,
721 mng_int32 iS,
722 mng_uint32 iWidth,
723 mng_uint8p iSrcline1,
724 mng_uint8p iSrcline2,
725 mng_uint8p iDstline);
726
727/* ************************************************************************** */
728/* * * */
729/* * Routines for swapping byte-order from and to graphic files * */
730/* * (This code is adapted from the libpng package) * */
731/* * * */
732/* ************************************************************************** */
733
734#ifndef MNG_BIGENDIAN_SUPPORTED
735mng_uint32 mng_get_uint32 (mng_uint8p pBuf);
736mng_int32 mng_get_int32 (mng_uint8p pBuf);
737mng_uint16 mng_get_uint16 (mng_uint8p pBuf);
738void mng_put_uint32 (mng_uint8p pBuf,
739 mng_uint32 i);
740void mng_put_int32 (mng_uint8p pBuf,
741 mng_int32 i);
742void mng_put_uint16 (mng_uint8p pBuf,
743 mng_uint16 i);
744#else /* MNG_BIGENDIAN_SUPPORTED */
745#define mng_get_uint32(P) *(mng_uint32p)(P)
746#define mng_get_int32(P) *(mng_int32p)(P)
747#define mng_get_uint16(P) *(mng_uint16p)(P)
748#define mng_put_uint32(P,I) *(mng_uint32p)(P) = (I)
749#define mng_put_int32(P,I) *(mng_int32p)(P) = (I)
750#define mng_put_uint16(P,I) *(mng_uint16p)(P) = (I)
751#endif /* MNG_BIGENDIAN_SUPPORTED */
752
753/* ************************************************************************** */
754/* * * */
755/* * Some handy(?) macro definitions * */
756/* * * */
757/* ************************************************************************** */
758
759#define MAX_COORD(a, b) (((a) > (b)) ? (a) : (b))
760#define MIN_COORD(a, b) (((a) < (b)) ? (a) : (b))
761
762/* ************************************************************************** */
763
764#endif /* _libmng_data_h_ */
765
766/* ************************************************************************** */
767/* * end of file * */
768/* ************************************************************************** */
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