|
0
|
1 |
/* ************************************************************************** */
|
|
|
2 |
/* * For conditions of distribution and use, * */
|
|
|
3 |
/* * see copyright notice in libmng.h * */
|
|
|
4 |
/* ************************************************************************** */
|
|
|
5 |
/* * * */
|
|
|
6 |
/* * project : libmng * */
|
|
|
7 |
/* * file : libmng_read.c copyright (c) 2000-2007 G.Juyn * */
|
|
|
8 |
/* * version : 1.0.10 * */
|
|
|
9 |
/* * * */
|
|
|
10 |
/* * purpose : Read logic (implementation) * */
|
|
|
11 |
/* * * */
|
|
|
12 |
/* * author : G.Juyn * */
|
|
|
13 |
/* * * */
|
|
|
14 |
/* * comment : implementation of the high-level read logic * */
|
|
|
15 |
/* * * */
|
|
|
16 |
/* * changes : 0.5.1 - 05/08/2000 - G.Juyn * */
|
|
|
17 |
/* * - changed strict-ANSI stuff * */
|
|
|
18 |
/* * 0.5.1 - 05/11/2000 - G.Juyn * */
|
|
|
19 |
/* * - added callback error-reporting support * */
|
|
|
20 |
/* * 0.5.1 - 05/12/2000 - G.Juyn * */
|
|
|
21 |
/* * - changed trace to macro for callback error-reporting * */
|
|
|
22 |
/* * * */
|
|
|
23 |
/* * 0.5.2 - 05/19/2000 - G.Juyn * */
|
|
|
24 |
/* * - cleaned up some code regarding mixed support * */
|
|
|
25 |
/* * 0.5.2 - 05/20/2000 - G.Juyn * */
|
|
|
26 |
/* * - added support for JNG * */
|
|
|
27 |
/* * 0.5.2 - 05/31/2000 - G.Juyn * */
|
|
|
28 |
/* * - fixed up punctuation (contribution by Tim Rowley) * */
|
|
|
29 |
/* * * */
|
|
|
30 |
/* * 0.5.3 - 06/16/2000 - G.Juyn * */
|
|
|
31 |
/* * - changed progressive-display processing * */
|
|
|
32 |
/* * * */
|
|
|
33 |
/* * 0.9.1 - 07/08/2000 - G.Juyn * */
|
|
|
34 |
/* * - changed read-processing for improved I/O-suspension * */
|
|
|
35 |
/* * 0.9.1 - 07/14/2000 - G.Juyn * */
|
|
|
36 |
/* * - changed EOF processing behavior * */
|
|
|
37 |
/* * 0.9.1 - 07/14/2000 - G.Juyn * */
|
|
|
38 |
/* * - changed default readbuffer size from 1024 to 4200 * */
|
|
|
39 |
/* * * */
|
|
|
40 |
/* * 0.9.2 - 07/27/2000 - G.Juyn * */
|
|
|
41 |
/* * - B110320 - fixed GCC warning about mix-sized pointer math * */
|
|
|
42 |
/* * 0.9.2 - 07/31/2000 - G.Juyn * */
|
|
|
43 |
/* * - B110546 - fixed for improperly returning UNEXPECTEDEOF * */
|
|
|
44 |
/* * 0.9.2 - 08/04/2000 - G.Juyn * */
|
|
|
45 |
/* * - B111096 - fixed large-buffer read-suspension * */
|
|
|
46 |
/* * 0.9.2 - 08/05/2000 - G.Juyn * */
|
|
|
47 |
/* * - changed file-prefixes * */
|
|
|
48 |
/* * * */
|
|
|
49 |
/* * 0.9.3 - 08/26/2000 - G.Juyn * */
|
|
|
50 |
/* * - added MAGN chunk * */
|
|
|
51 |
/* * 0.9.3 - 10/11/2000 - G.Juyn * */
|
|
|
52 |
/* * - removed test-MaGN * */
|
|
|
53 |
/* * 0.9.3 - 10/16/2000 - G.Juyn * */
|
|
|
54 |
/* * - added support for JDAA * */
|
|
|
55 |
/* * * */
|
|
|
56 |
/* * 0.9.5 - 01/23/2001 - G.Juyn * */
|
|
|
57 |
/* * - fixed timing-problem with switching framing_modes * */
|
|
|
58 |
/* * * */
|
|
|
59 |
/* * 1.0.4 - 06/22/2002 - G.Juyn * */
|
|
|
60 |
/* * - B495443 - incorrect suspend check in read_databuffer * */
|
|
|
61 |
/* * * */
|
|
|
62 |
/* * 1.0.5 - 07/04/2002 - G.Juyn * */
|
|
|
63 |
/* * - added errorcode for extreme chunk-sizes * */
|
|
|
64 |
/* * 1.0.5 - 07/08/2002 - G.Juyn * */
|
|
|
65 |
/* * - B578572 - removed eMNGma hack (thanks Dimitri!) * */
|
|
|
66 |
/* * 1.0.5 - 07/16/2002 - G.Juyn * */
|
|
|
67 |
/* * - B581625 - large chunks fail with suspension reads * */
|
|
|
68 |
/* * 1.0.5 - 08/19/2002 - G.Juyn * */
|
|
|
69 |
/* * - B597134 - libmng pollutes the linker namespace * */
|
|
|
70 |
/* * - added HLAPI function to copy chunks * */
|
|
|
71 |
/* * 1.0.5 - 09/16/2002 - G.Juyn * */
|
|
|
72 |
/* * - added event handling for dynamic MNG * */
|
|
|
73 |
/* * * */
|
|
|
74 |
/* * 1.0.6 - 05/25/2003 - G.R-P * */
|
|
|
75 |
/* * - added MNG_SKIPCHUNK_cHNK footprint optimizations * */
|
|
|
76 |
/* * 1.0.6 - 07/07/2003 - G.R-P * */
|
|
|
77 |
/* * - added MNG_NO_DELTA_PNG reduction * */
|
|
|
78 |
/* * - skip additional code when MNG_INCLUDE_JNG is not enabled * */
|
|
|
79 |
/* * 1.0.6 - 07/29/2003 - G.R-P * */
|
|
|
80 |
/* * - added conditionals around PAST chunk support * */
|
|
|
81 |
/* * 1.0.6 - 08/17/2003 - G.R-P * */
|
|
|
82 |
/* * - added conditionals around non-VLC chunk support * */
|
|
|
83 |
/* * * */
|
|
|
84 |
/* * 1.0.7 - 03/10/2004 - G.R-P * */
|
|
|
85 |
/* * - added conditionals around openstream/closestream * */
|
|
|
86 |
/* * * */
|
|
|
87 |
/* * 1.0.8 - 04/08/2004 - G.Juyn * */
|
|
|
88 |
/* * - added CRC existence & checking flags * */
|
|
|
89 |
/* * 1.0.8 - 04/11/2004 - G.Juyn * */
|
|
|
90 |
/* * - added data-push mechanisms for specialized decoders * */
|
|
|
91 |
/* * 1.0.8 - 07/06/2004 - G.R-P * */
|
|
|
92 |
/* * - defend against using undefined closestream function * */
|
|
|
93 |
/* * 1.0.8 - 07/28/2004 - G.R-P * */
|
|
|
94 |
/* * - added check for extreme chunk-lengths * */
|
|
|
95 |
/* * * */
|
|
|
96 |
/* * 1.0.9 - 09/16/2004 - G.Juyn * */
|
|
|
97 |
/* * - fixed chunk pushing mechanism * */
|
|
|
98 |
/* * 1.0.9 - 12/05/2004 - G.Juyn * */
|
|
|
99 |
/* * - added conditional MNG_OPTIMIZE_CHUNKINITFREE * */
|
|
|
100 |
/* * 1.0.9 - 12/06/2004 - G.Juyn * */
|
|
|
101 |
/* * - added conditional MNG_OPTIMIZE_CHUNKASSIGN * */
|
|
|
102 |
/* * - added conditional MNG_OPTIMIZE_CHUNKREADER * */
|
|
|
103 |
/* * 1.0.9 - 12/20/2004 - G.Juyn * */
|
|
|
104 |
/* * - cleaned up macro-invocations (thanks to D. Airlie) * */
|
|
|
105 |
/* * 1.0.9 - 12/31/2004 - G.R-P * */
|
|
|
106 |
/* * - removed stray characters from #ifdef directive * */
|
|
|
107 |
/* * * */
|
|
|
108 |
/* * 1.0.10 - 04/08/2007 - G.Juyn * */
|
|
|
109 |
/* * - added support for mPNG proposal * */
|
|
|
110 |
/* * * */
|
|
|
111 |
/* ************************************************************************** */
|
|
|
112 |
|
|
|
113 |
#include "libmng.h"
|
|
|
114 |
#include "libmng_data.h"
|
|
|
115 |
#include "libmng_error.h"
|
|
|
116 |
#include "libmng_trace.h"
|
|
|
117 |
#ifdef __BORLANDC__
|
|
|
118 |
#pragma hdrstop
|
|
|
119 |
#endif
|
|
|
120 |
#include "libmng_memory.h"
|
|
|
121 |
#include "libmng_objects.h"
|
|
|
122 |
#include "libmng_object_prc.h"
|
|
|
123 |
#include "libmng_chunks.h"
|
|
|
124 |
#ifdef MNG_OPTIMIZE_CHUNKREADER
|
|
|
125 |
#include "libmng_chunk_descr.h"
|
|
|
126 |
#endif
|
|
|
127 |
#include "libmng_chunk_prc.h"
|
|
|
128 |
#include "libmng_chunk_io.h"
|
|
|
129 |
#include "libmng_display.h"
|
|
|
130 |
#include "libmng_read.h"
|
|
|
131 |
|
|
|
132 |
#if defined(__BORLANDC__) && defined(MNG_STRICT_ANSI)
|
|
|
133 |
#pragma option -A /* force ANSI-C */
|
|
|
134 |
#endif
|
|
|
135 |
|
|
|
136 |
/* ************************************************************************** */
|
|
|
137 |
|
|
|
138 |
#ifdef MNG_INCLUDE_READ_PROCS
|
|
|
139 |
|
|
|
140 |
/* ************************************************************************** */
|
|
|
141 |
|
|
|
142 |
mng_retcode mng_process_eof (mng_datap pData)
|
|
|
143 |
{
|
|
|
144 |
if (!pData->bEOF) /* haven't closed the stream yet ? */
|
|
|
145 |
{
|
|
|
146 |
pData->bEOF = MNG_TRUE; /* now we do! */
|
|
|
147 |
|
|
|
148 |
#ifndef MNG_NO_OPEN_CLOSE_STREAM
|
|
|
149 |
if (pData->fClosestream && !pData->fClosestream ((mng_handle)pData))
|
|
|
150 |
{
|
|
|
151 |
MNG_ERROR (pData, MNG_APPIOERROR);
|
|
|
152 |
}
|
|
|
153 |
#endif
|
|
|
154 |
}
|
|
|
155 |
|
|
|
156 |
return MNG_NOERROR;
|
|
|
157 |
}
|
|
|
158 |
|
|
|
159 |
/* ************************************************************************** */
|
|
|
160 |
|
|
|
161 |
mng_retcode mng_release_pushdata (mng_datap pData)
|
|
|
162 |
{
|
|
|
163 |
mng_pushdatap pFirst = pData->pFirstpushdata;
|
|
|
164 |
mng_pushdatap pNext = pFirst->pNext;
|
|
|
165 |
|
|
|
166 |
#ifdef MNG_SUPPORT_TRACE
|
|
|
167 |
MNG_TRACE (pData, MNG_FN_RELEASE_PUSHDATA, MNG_LC_START);
|
|
|
168 |
#endif
|
|
|
169 |
|
|
|
170 |
pData->pFirstpushdata = pNext; /* next becomes the first */
|
|
|
171 |
|
|
|
172 |
if (!pNext) /* no next? => no last! */
|
|
|
173 |
pData->pLastpushdata = MNG_NULL;
|
|
|
174 |
/* buffer owned and release callback defined? */
|
|
|
175 |
if ((pFirst->bOwned) && (pData->fReleasedata))
|
|
|
176 |
pData->fReleasedata ((mng_handle)pData, pFirst->pData, pFirst->iLength);
|
|
|
177 |
else /* otherwise use internal free mechanism */
|
|
|
178 |
MNG_FREEX (pData, pFirst->pData, pFirst->iLength);
|
|
|
179 |
/* and free it */
|
|
|
180 |
MNG_FREEX (pData, pFirst, sizeof(mng_pushdata));
|
|
|
181 |
|
|
|
182 |
#ifdef MNG_SUPPORT_TRACE
|
|
|
183 |
MNG_TRACE (pData, MNG_FN_RELEASE_PUSHDATA, MNG_LC_END);
|
|
|
184 |
#endif
|
|
|
185 |
|
|
|
186 |
return MNG_NOERROR;
|
|
|
187 |
}
|
|
|
188 |
|
|
|
189 |
/* ************************************************************************** */
|
|
|
190 |
|
|
|
191 |
mng_retcode mng_release_pushchunk (mng_datap pData)
|
|
|
192 |
{
|
|
|
193 |
mng_pushdatap pFirst = pData->pFirstpushchunk;
|
|
|
194 |
mng_pushdatap pNext = pFirst->pNext;
|
|
|
195 |
|
|
|
196 |
#ifdef MNG_SUPPORT_TRACE
|
|
|
197 |
MNG_TRACE (pData, MNG_FN_RELEASE_PUSHCHUNK, MNG_LC_START);
|
|
|
198 |
#endif
|
|
|
199 |
|
|
|
200 |
pData->pFirstpushchunk = pNext; /* next becomes the first */
|
|
|
201 |
|
|
|
202 |
if (!pNext) /* no next? => no last! */
|
|
|
203 |
pData->pLastpushchunk = MNG_NULL;
|
|
|
204 |
/* buffer owned and release callback defined? */
|
|
|
205 |
if ((pFirst->bOwned) && (pData->fReleasedata))
|
|
|
206 |
pData->fReleasedata ((mng_handle)pData, pFirst->pData, pFirst->iLength);
|
|
|
207 |
else /* otherwise use internal free mechanism */
|
|
|
208 |
MNG_FREEX (pData, pFirst->pData, pFirst->iLength);
|
|
|
209 |
/* and free it */
|
|
|
210 |
MNG_FREEX (pData, pFirst, sizeof(mng_pushdata));
|
|
|
211 |
|
|
|
212 |
#ifdef MNG_SUPPORT_TRACE
|
|
|
213 |
MNG_TRACE (pData, MNG_FN_RELEASE_PUSHCHUNK, MNG_LC_END);
|
|
|
214 |
#endif
|
|
|
215 |
|
|
|
216 |
return MNG_NOERROR;
|
|
|
217 |
}
|
|
|
218 |
|
|
|
219 |
/* ************************************************************************** */
|
|
|
220 |
|
|
|
221 |
MNG_LOCAL mng_retcode read_data (mng_datap pData,
|
|
|
222 |
mng_uint8p pBuf,
|
|
|
223 |
mng_uint32 iSize,
|
|
|
224 |
mng_uint32 * iRead)
|
|
|
225 |
{
|
|
|
226 |
mng_retcode iRetcode;
|
|
|
227 |
mng_uint32 iTempsize = iSize;
|
|
|
228 |
mng_uint8p pTempbuf = pBuf;
|
|
|
229 |
mng_pushdatap pPush = pData->pFirstpushdata;
|
|
|
230 |
mng_uint32 iPushsize = 0;
|
|
|
231 |
*iRead = 0; /* nothing yet */
|
|
|
232 |
|
|
|
233 |
#ifdef MNG_SUPPORT_TRACE
|
|
|
234 |
MNG_TRACE (pData, MNG_FN_READ_DATA, MNG_LC_START);
|
|
|
235 |
#endif
|
|
|
236 |
|
|
|
237 |
while (pPush) /* calculate size of pushed data */
|
|
|
238 |
{
|
|
|
239 |
iPushsize += pPush->iRemaining;
|
|
|
240 |
pPush = pPush->pNext;
|
|
|
241 |
}
|
|
|
242 |
|
|
|
243 |
if (iTempsize <= iPushsize) /* got enough push data? */
|
|
|
244 |
{
|
|
|
245 |
while (iTempsize)
|
|
|
246 |
{
|
|
|
247 |
pPush = pData->pFirstpushdata;
|
|
|
248 |
/* enough data remaining in this buffer? */
|
|
|
249 |
if (pPush->iRemaining <= iTempsize)
|
|
|
250 |
{ /* no: then copy what we've got */
|
|
|
251 |
MNG_COPY (pTempbuf, pPush->pDatanext, pPush->iRemaining);
|
|
|
252 |
/* move pointers & lengths */
|
|
|
253 |
pTempbuf += pPush->iRemaining;
|
|
|
254 |
*iRead += pPush->iRemaining;
|
|
|
255 |
iTempsize -= pPush->iRemaining;
|
|
|
256 |
/* release the depleted buffer */
|
|
|
257 |
iRetcode = mng_release_pushdata (pData);
|
|
|
258 |
if (iRetcode)
|
|
|
259 |
return iRetcode;
|
|
|
260 |
}
|
|
|
261 |
else
|
|
|
262 |
{ /* copy the needed bytes */
|
|
|
263 |
MNG_COPY (pTempbuf, pPush->pDatanext, iTempsize);
|
|
|
264 |
/* move pointers & lengths */
|
|
|
265 |
pPush->iRemaining -= iTempsize;
|
|
|
266 |
pPush->pDatanext += iTempsize;
|
|
|
267 |
pTempbuf += iTempsize;
|
|
|
268 |
*iRead += iTempsize;
|
|
|
269 |
iTempsize = 0; /* all done!!! */
|
|
|
270 |
}
|
|
|
271 |
}
|
|
|
272 |
}
|
|
|
273 |
else
|
|
|
274 |
{
|
|
|
275 |
mng_uint32 iTempread = 0;
|
|
|
276 |
/* get it from the app then */
|
|
|
277 |
if (!pData->fReaddata (((mng_handle)pData), pTempbuf, iTempsize, &iTempread))
|
|
|
278 |
MNG_ERROR (pData, MNG_APPIOERROR);
|
|
|
279 |
|
|
|
280 |
*iRead += iTempread;
|
|
|
281 |
}
|
|
|
282 |
|
|
|
283 |
#ifdef MNG_SUPPORT_TRACE
|
|
|
284 |
MNG_TRACE (pData, MNG_FN_READ_DATA, MNG_LC_END);
|
|
|
285 |
#endif
|
|
|
286 |
|
|
|
287 |
return MNG_NOERROR;
|
|
|
288 |
}
|
|
|
289 |
|
|
|
290 |
/* ************************************************************************** */
|
|
|
291 |
|
|
|
292 |
MNG_LOCAL mng_retcode read_databuffer (mng_datap pData,
|
|
|
293 |
mng_uint8p pBuf,
|
|
|
294 |
mng_uint8p * pBufnext,
|
|
|
295 |
mng_uint32 iSize,
|
|
|
296 |
mng_uint32 * iRead)
|
|
|
297 |
{
|
|
|
298 |
mng_retcode iRetcode;
|
|
|
299 |
|
|
|
300 |
#ifdef MNG_SUPPORT_TRACE
|
|
|
301 |
MNG_TRACE (pData, MNG_FN_READ_DATABUFFER, MNG_LC_START);
|
|
|
302 |
#endif
|
|
|
303 |
|
|
|
304 |
if (pData->bSuspensionmode)
|
|
|
305 |
{
|
|
|
306 |
mng_uint8p pTemp;
|
|
|
307 |
mng_uint32 iTemp;
|
|
|
308 |
|
|
|
309 |
*iRead = 0; /* let's be negative about the outcome */
|
|
|
310 |
|
|
|
311 |
if (!pData->pSuspendbuf) /* need to create a suspension buffer ? */
|
|
|
312 |
{
|
|
|
313 |
pData->iSuspendbufsize = MNG_SUSPENDBUFFERSIZE;
|
|
|
314 |
/* so, create it */
|
|
|
315 |
MNG_ALLOC (pData, pData->pSuspendbuf, pData->iSuspendbufsize);
|
|
|
316 |
|
|
|
317 |
pData->iSuspendbufleft = 0; /* make sure to fill it first time */
|
|
|
318 |
pData->pSuspendbufnext = pData->pSuspendbuf;
|
|
|
319 |
}
|
|
|
320 |
/* more than our buffer can hold ? */
|
|
|
321 |
if (iSize > pData->iSuspendbufsize)
|
|
|
322 |
{
|
|
|
323 |
mng_uint32 iRemain;
|
|
|
324 |
|
|
|
325 |
if (!*pBufnext) /* first time ? */
|
|
|
326 |
{
|
|
|
327 |
if (pData->iSuspendbufleft) /* do we have some data left ? */
|
|
|
328 |
{ /* then copy it */
|
|
|
329 |
MNG_COPY (pBuf, pData->pSuspendbufnext, pData->iSuspendbufleft);
|
|
|
330 |
/* fixup variables */
|
|
|
331 |
*pBufnext = pBuf + pData->iSuspendbufleft;
|
|
|
332 |
pData->pSuspendbufnext = pData->pSuspendbuf;
|
|
|
333 |
pData->iSuspendbufleft = 0;
|
|
|
334 |
}
|
|
|
335 |
else
|
|
|
336 |
{
|
|
|
337 |
*pBufnext = pBuf;
|
|
|
338 |
}
|
|
|
339 |
}
|
|
|
340 |
/* calculate how much to get */
|
|
|
341 |
iRemain = iSize - (mng_uint32)(*pBufnext - pBuf);
|
|
|
342 |
/* let's go get it */
|
|
|
343 |
iRetcode = read_data (pData, *pBufnext, iRemain, &iTemp);
|
|
|
344 |
if (iRetcode)
|
|
|
345 |
return iRetcode;
|
|
|
346 |
/* first read after suspension return 0 means EOF */
|
|
|
347 |
if ((pData->iSuspendpoint) && (iTemp == 0))
|
|
|
348 |
{ /* that makes it final */
|
|
|
349 |
mng_retcode iRetcode = mng_process_eof (pData);
|
|
|
350 |
if (iRetcode) /* on error bail out */
|
|
|
351 |
return iRetcode;
|
|
|
352 |
/* indicate the source is depleted */
|
|
|
353 |
*iRead = iSize - iRemain + iTemp;
|
|
|
354 |
}
|
|
|
355 |
else
|
|
|
356 |
{
|
|
|
357 |
if (iTemp < iRemain) /* suspension required ? */
|
|
|
358 |
{
|
|
|
359 |
*pBufnext = *pBufnext + iTemp;
|
|
|
360 |
pData->bSuspended = MNG_TRUE;
|
|
|
361 |
}
|
|
|
362 |
else
|
|
|
363 |
{
|
|
|
364 |
*iRead = iSize; /* got it all now ! */
|
|
|
365 |
}
|
|
|
366 |
}
|
|
|
367 |
}
|
|
|
368 |
else
|
|
|
369 |
{ /* need to read some more ? */
|
|
|
370 |
while ((!pData->bSuspended) && (!pData->bEOF) && (iSize > pData->iSuspendbufleft))
|
|
|
371 |
{ /* not enough space left in buffer ? */
|
|
|
372 |
if (pData->iSuspendbufsize - pData->iSuspendbufleft -
|
|
|
373 |
(mng_uint32)(pData->pSuspendbufnext - pData->pSuspendbuf) <
|
|
|
374 |
MNG_SUSPENDREQUESTSIZE)
|
|
|
375 |
{
|
|
|
376 |
if (pData->iSuspendbufleft) /* then lets shift (if there's anything left) */
|
|
|
377 |
MNG_COPY (pData->pSuspendbuf, pData->pSuspendbufnext, pData->iSuspendbufleft);
|
|
|
378 |
/* adjust running pointer */
|
|
|
379 |
pData->pSuspendbufnext = pData->pSuspendbuf;
|
|
|
380 |
}
|
|
|
381 |
/* still not enough room ? */
|
|
|
382 |
if (pData->iSuspendbufsize - pData->iSuspendbufleft < MNG_SUSPENDREQUESTSIZE)
|
|
|
383 |
MNG_ERROR (pData, MNG_INTERNALERROR);
|
|
|
384 |
/* now read some more data */
|
|
|
385 |
pTemp = pData->pSuspendbufnext + pData->iSuspendbufleft;
|
|
|
386 |
|
|
|
387 |
iRetcode = read_data (pData, pTemp, MNG_SUSPENDREQUESTSIZE, &iTemp);
|
|
|
388 |
if (iRetcode)
|
|
|
389 |
return iRetcode;
|
|
|
390 |
/* adjust fill-counter */
|
|
|
391 |
pData->iSuspendbufleft += iTemp;
|
|
|
392 |
/* first read after suspension returning 0 means EOF */
|
|
|
393 |
if ((pData->iSuspendpoint) && (iTemp == 0))
|
|
|
394 |
{ /* that makes it final */
|
|
|
395 |
mng_retcode iRetcode = mng_process_eof (pData);
|
|
|
396 |
if (iRetcode) /* on error bail out */
|
|
|
397 |
return iRetcode;
|
|
|
398 |
|
|
|
399 |
if (pData->iSuspendbufleft) /* return the leftover scraps */
|
|
|
400 |
MNG_COPY (pBuf, pData->pSuspendbufnext, pData->iSuspendbufleft);
|
|
|
401 |
/* and indicate so */
|
|
|
402 |
*iRead = pData->iSuspendbufleft;
|
|
|
403 |
pData->pSuspendbufnext = pData->pSuspendbuf;
|
|
|
404 |
pData->iSuspendbufleft = 0;
|
|
|
405 |
}
|
|
|
406 |
else
|
|
|
407 |
{ /* suspension required ? */
|
|
|
408 |
if ((iSize > pData->iSuspendbufleft) && (iTemp < MNG_SUSPENDREQUESTSIZE))
|
|
|
409 |
pData->bSuspended = MNG_TRUE;
|
|
|
410 |
|
|
|
411 |
}
|
|
|
412 |
|
|
|
413 |
pData->iSuspendpoint = 0; /* reset it here in case we loop back */
|
|
|
414 |
}
|
|
|
415 |
|
|
|
416 |
if ((!pData->bSuspended) && (!pData->bEOF))
|
|
|
417 |
{ /* return the data ! */
|
|
|
418 |
MNG_COPY (pBuf, pData->pSuspendbufnext, iSize);
|
|
|
419 |
|
|
|
420 |
*iRead = iSize; /* returned it all */
|
|
|
421 |
/* adjust suspension-buffer variables */
|
|
|
422 |
pData->pSuspendbufnext += iSize;
|
|
|
423 |
pData->iSuspendbufleft -= iSize;
|
|
|
424 |
}
|
|
|
425 |
}
|
|
|
426 |
}
|
|
|
427 |
else
|
|
|
428 |
{
|
|
|
429 |
iRetcode = read_data (pData, (mng_ptr)pBuf, iSize, iRead);
|
|
|
430 |
if (iRetcode)
|
|
|
431 |
return iRetcode;
|
|
|
432 |
if (*iRead == 0) /* suspension required ? */
|
|
|
433 |
pData->bSuspended = MNG_TRUE;
|
|
|
434 |
}
|
|
|
435 |
|
|
|
436 |
pData->iSuspendpoint = 0; /* safely reset it here ! */
|
|
|
437 |
|
|
|
438 |
#ifdef MNG_SUPPORT_TRACE
|
|
|
439 |
MNG_TRACE (pData, MNG_FN_READ_DATABUFFER, MNG_LC_END);
|
|
|
440 |
#endif
|
|
|
441 |
|
|
|
442 |
return MNG_NOERROR;
|
|
|
443 |
}
|
|
|
444 |
|
|
|
445 |
/* ************************************************************************** */
|
|
|
446 |
|
|
|
447 |
MNG_LOCAL mng_retcode process_raw_chunk (mng_datap pData,
|
|
|
448 |
mng_uint8p pBuf,
|
|
|
449 |
mng_uint32 iBuflen)
|
|
|
450 |
{
|
|
|
451 |
|
|
|
452 |
#ifndef MNG_OPTIMIZE_CHUNKREADER
|
|
|
453 |
/* the table-idea & binary search code was adapted from
|
|
|
454 |
libpng 1.1.0 (pngread.c) */
|
|
|
455 |
/* NOTE1: the table must remain sorted by chunkname, otherwise the binary
|
|
|
456 |
search will break !!! (ps. watch upper-/lower-case chunknames !!) */
|
|
|
457 |
/* NOTE2: the layout must remain equal to the header part of all the
|
|
|
458 |
chunk-structures (yes, that means even the pNext and pPrev fields;
|
|
|
459 |
it's wasting a bit of space, but hey, the code is a lot easier) */
|
|
|
460 |
|
|
|
461 |
#ifdef MNG_OPTIMIZE_CHUNKINITFREE
|
|
|
462 |
mng_chunk_header mng_chunk_unknown = {MNG_UINT_HUH, mng_init_general, mng_free_unknown,
|
|
|
463 |
mng_read_unknown, mng_write_unknown, mng_assign_unknown, 0, 0, sizeof(mng_unknown_chunk)};
|
|
|
464 |
#else
|
|
|
465 |
mng_chunk_header mng_chunk_unknown = {MNG_UINT_HUH, mng_init_unknown, mng_free_unknown,
|
|
|
466 |
mng_read_unknown, mng_write_unknown, mng_assign_unknown, 0, 0};
|
|
|
467 |
#endif
|
|
|
468 |
|
|
|
469 |
#ifdef MNG_OPTIMIZE_CHUNKINITFREE
|
|
|
470 |
|
|
|
471 |
mng_chunk_header mng_chunk_table [] =
|
|
|
472 |
{
|
|
|
473 |
#ifndef MNG_SKIPCHUNK_BACK
|
|
|
474 |
{MNG_UINT_BACK, mng_init_general, mng_free_general, mng_read_back, mng_write_back, mng_assign_general, 0, 0, sizeof(mng_back)},
|
|
|
475 |
#endif
|
|
|
476 |
#ifndef MNG_SKIPCHUNK_BASI
|
|
|
477 |
{MNG_UINT_BASI, mng_init_general, mng_free_general, mng_read_basi, mng_write_basi, mng_assign_general, 0, 0, sizeof(mng_basi)},
|
|
|
478 |
#endif
|
|
|
479 |
#ifndef MNG_SKIPCHUNK_CLIP
|
|
|
480 |
{MNG_UINT_CLIP, mng_init_general, mng_free_general, mng_read_clip, mng_write_clip, mng_assign_general, 0, 0, sizeof(mng_clip)},
|
|
|
481 |
#endif
|
|
|
482 |
#ifndef MNG_SKIPCHUNK_CLON
|
|
|
483 |
{MNG_UINT_CLON, mng_init_general, mng_free_general, mng_read_clon, mng_write_clon, mng_assign_general, 0, 0, sizeof(mng_clon)},
|
|
|
484 |
#endif
|
|
|
485 |
#ifndef MNG_NO_DELTA_PNG
|
|
|
486 |
#ifndef MNG_SKIPCHUNK_DBYK
|
|
|
487 |
{MNG_UINT_DBYK, mng_init_general, mng_free_dbyk, mng_read_dbyk, mng_write_dbyk, mng_assign_dbyk, 0, 0, sizeof(mng_dbyk)},
|
|
|
488 |
#endif
|
|
|
489 |
#endif
|
|
|
490 |
#ifndef MNG_SKIPCHUNK_DEFI
|
|
|
491 |
{MNG_UINT_DEFI, mng_init_general, mng_free_general, mng_read_defi, mng_write_defi, mng_assign_general, 0, 0, sizeof(mng_defi)},
|
|
|
492 |
#endif
|
|
|
493 |
#ifndef MNG_NO_DELTA_PNG
|
|
|
494 |
{MNG_UINT_DHDR, mng_init_general, mng_free_general, mng_read_dhdr, mng_write_dhdr, mng_assign_general, 0, 0, sizeof(mng_dhdr)},
|
|
|
495 |
#endif
|
|
|
496 |
#ifndef MNG_SKIPCHUNK_DISC
|
|
|
497 |
{MNG_UINT_DISC, mng_init_general, mng_free_disc, mng_read_disc, mng_write_disc, mng_assign_disc, 0, 0, sizeof(mng_disc)},
|
|
|
498 |
#endif
|
|
|
499 |
#ifndef MNG_NO_DELTA_PNG
|
|
|
500 |
#ifndef MNG_SKIPCHUNK_DROP
|
|
|
501 |
{MNG_UINT_DROP, mng_init_general, mng_free_drop, mng_read_drop, mng_write_drop, mng_assign_drop, 0, 0, sizeof(mng_drop)},
|
|
|
502 |
#endif
|
|
|
503 |
#endif
|
|
|
504 |
#ifndef MNG_SKIPCHUNK_LOOP
|
|
|
505 |
{MNG_UINT_ENDL, mng_init_general, mng_free_general, mng_read_endl, mng_write_endl, mng_assign_general, 0, 0, sizeof(mng_endl)},
|
|
|
506 |
#endif
|
|
|
507 |
#ifndef MNG_SKIPCHUNK_FRAM
|
|
|
508 |
{MNG_UINT_FRAM, mng_init_general, mng_free_fram, mng_read_fram, mng_write_fram, mng_assign_fram, 0, 0, sizeof(mng_fram)},
|
|
|
509 |
#endif
|
|
|
510 |
{MNG_UINT_IDAT, mng_init_general, mng_free_idat, mng_read_idat, mng_write_idat, mng_assign_idat, 0, 0, sizeof(mng_idat)}, /* 12-th element! */
|
|
|
511 |
{MNG_UINT_IEND, mng_init_general, mng_free_general, mng_read_iend, mng_write_iend, mng_assign_general, 0, 0, sizeof(mng_iend)},
|
|
|
512 |
{MNG_UINT_IHDR, mng_init_general, mng_free_general, mng_read_ihdr, mng_write_ihdr, mng_assign_general, 0, 0, sizeof(mng_ihdr)},
|
|
|
513 |
#ifndef MNG_NO_DELTA_PNG
|
|
|
514 |
#ifdef MNG_INCLUDE_JNG
|
|
|
515 |
{MNG_UINT_IJNG, mng_init_general, mng_free_general, mng_read_ijng, mng_write_ijng, mng_assign_general, 0, 0, sizeof(mng_ijng)},
|
|
|
516 |
#endif
|
|
|
517 |
{MNG_UINT_IPNG, mng_init_general, mng_free_general, mng_read_ipng, mng_write_ipng, mng_assign_general, 0, 0, sizeof(mng_ipng)},
|
|
|
518 |
#endif
|
|
|
519 |
#ifdef MNG_INCLUDE_JNG
|
|
|
520 |
{MNG_UINT_JDAA, mng_init_general, mng_free_jdaa, mng_read_jdaa, mng_write_jdaa, mng_assign_jdaa, 0, 0, sizeof(mng_jdaa)},
|
|
|
521 |
{MNG_UINT_JDAT, mng_init_general, mng_free_jdat, mng_read_jdat, mng_write_jdat, mng_assign_jdat, 0, 0, sizeof(mng_jdat)},
|
|
|
522 |
{MNG_UINT_JHDR, mng_init_general, mng_free_general, mng_read_jhdr, mng_write_jhdr, mng_assign_general, 0, 0, sizeof(mng_jhdr)},
|
|
|
523 |
{MNG_UINT_JSEP, mng_init_general, mng_free_general, mng_read_jsep, mng_write_jsep, mng_assign_general, 0, 0, sizeof(mng_jsep)},
|
|
|
524 |
{MNG_UINT_JdAA, mng_init_general, mng_free_jdaa, mng_read_jdaa, mng_write_jdaa, mng_assign_jdaa, 0, 0, sizeof(mng_jdaa)},
|
|
|
525 |
#endif
|
|
|
526 |
#ifndef MNG_SKIPCHUNK_LOOP
|
|
|
527 |
{MNG_UINT_LOOP, mng_init_general, mng_free_loop, mng_read_loop, mng_write_loop, mng_assign_loop, 0, 0, sizeof(mng_loop)},
|
|
|
528 |
#endif
|
|
|
529 |
#ifndef MNG_SKIPCHUNK_MAGN
|
|
|
530 |
{MNG_UINT_MAGN, mng_init_general, mng_free_general, mng_read_magn, mng_write_magn, mng_assign_general, 0, 0, sizeof(mng_magn)},
|
|
|
531 |
#endif
|
|
|
532 |
{MNG_UINT_MEND, mng_init_general, mng_free_general, mng_read_mend, mng_write_mend, mng_assign_general, 0, 0, sizeof(mng_mend)},
|
|
|
533 |
{MNG_UINT_MHDR, mng_init_general, mng_free_general, mng_read_mhdr, mng_write_mhdr, mng_assign_general, 0, 0, sizeof(mng_mhdr)},
|
|
|
534 |
#ifndef MNG_SKIPCHUNK_MOVE
|
|
|
535 |
{MNG_UINT_MOVE, mng_init_general, mng_free_general, mng_read_move, mng_write_move, mng_assign_general, 0, 0, sizeof(mng_move)},
|
|
|
536 |
#endif
|
|
|
537 |
#ifndef MNG_NO_DELTA_PNG
|
|
|
538 |
#ifndef MNG_SKIPCHUNK_ORDR
|
|
|
539 |
{MNG_UINT_ORDR, mng_init_general, mng_free_ordr, mng_read_ordr, mng_write_ordr, mng_assign_ordr, 0, 0, sizeof(mng_ordr)},
|
|
|
540 |
#endif
|
|
|
541 |
#endif
|
|
|
542 |
#ifndef MNG_SKIPCHUNK_PAST
|
|
|
543 |
{MNG_UINT_PAST, mng_init_general, mng_free_past, mng_read_past, mng_write_past, mng_assign_past, 0, 0, sizeof(mng_past)},
|
|
|
544 |
#endif
|
|
|
545 |
{MNG_UINT_PLTE, mng_init_general, mng_free_general, mng_read_plte, mng_write_plte, mng_assign_general, 0, 0, sizeof(mng_plte)},
|
|
|
546 |
#ifndef MNG_NO_DELTA_PNG
|
|
|
547 |
{MNG_UINT_PPLT, mng_init_general, mng_free_general, mng_read_pplt, mng_write_pplt, mng_assign_general, 0, 0, sizeof(mng_pplt)},
|
|
|
548 |
{MNG_UINT_PROM, mng_init_general, mng_free_general, mng_read_prom, mng_write_prom, mng_assign_general, 0, 0, sizeof(mng_prom)},
|
|
|
549 |
#endif
|
|
|
550 |
#ifndef MNG_SKIPCHUNK_SAVE
|
|
|
551 |
{MNG_UINT_SAVE, mng_init_general, mng_free_save, mng_read_save, mng_write_save, mng_assign_save, 0, 0, sizeof(mng_save)},
|
|
|
552 |
#endif
|
|
|
553 |
#ifndef MNG_SKIPCHUNK_SEEK
|
|
|
554 |
{MNG_UINT_SEEK, mng_init_general, mng_free_seek, mng_read_seek, mng_write_seek, mng_assign_seek, 0, 0, sizeof(mng_seek)},
|
|
|
555 |
#endif
|
|
|
556 |
#ifndef MNG_SKIPCHUNK_SHOW
|
|
|
557 |
{MNG_UINT_SHOW, mng_init_general, mng_free_general, mng_read_show, mng_write_show, mng_assign_general, 0, 0, sizeof(mng_show)},
|
|
|
558 |
#endif
|
|
|
559 |
#ifndef MNG_SKIPCHUNK_TERM
|
|
|
560 |
{MNG_UINT_TERM, mng_init_general, mng_free_general, mng_read_term, mng_write_term, mng_assign_general, 0, 0, sizeof(mng_term)},
|
|
|
561 |
#endif
|
|
|
562 |
#ifndef MNG_SKIPCHUNK_bKGD
|
|
|
563 |
{MNG_UINT_bKGD, mng_init_general, mng_free_general, mng_read_bkgd, mng_write_bkgd, mng_assign_general, 0, 0, sizeof(mng_bkgd)},
|
|
|
564 |
#endif
|
|
|
565 |
#ifndef MNG_SKIPCHUNK_cHRM
|
|
|
566 |
{MNG_UINT_cHRM, mng_init_general, mng_free_general, mng_read_chrm, mng_write_chrm, mng_assign_general, 0, 0, sizeof(mng_chrm)},
|
|
|
567 |
#endif
|
|
|
568 |
#ifndef MNG_SKIPCHUNK_eXPI
|
|
|
569 |
{MNG_UINT_eXPI, mng_init_general, mng_free_expi, mng_read_expi, mng_write_expi, mng_assign_expi, 0, 0, sizeof(mng_expi)},
|
|
|
570 |
#endif
|
|
|
571 |
#ifndef MNG_SKIPCHUNK_evNT
|
|
|
572 |
{MNG_UINT_evNT, mng_init_general, mng_free_evnt, mng_read_evnt, mng_write_evnt, mng_assign_evnt, 0, 0, sizeof(mng_evnt)},
|
|
|
573 |
#endif
|
|
|
574 |
#ifndef MNG_SKIPCHUNK_fPRI
|
|
|
575 |
{MNG_UINT_fPRI, mng_init_general, mng_free_general, mng_read_fpri, mng_write_fpri, mng_assign_general, 0, 0, sizeof(mng_fpri)},
|
|
|
576 |
#endif
|
|
|
577 |
#ifndef MNG_SKIPCHUNK_gAMA
|
|
|
578 |
{MNG_UINT_gAMA, mng_init_general, mng_free_general, mng_read_gama, mng_write_gama, mng_assign_general, 0, 0, sizeof(mng_gama)},
|
|
|
579 |
#endif
|
|
|
580 |
#ifndef MNG_SKIPCHUNK_hIST
|
|
|
581 |
{MNG_UINT_hIST, mng_init_general, mng_free_general, mng_read_hist, mng_write_hist, mng_assign_general, 0, 0, sizeof(mng_hist)},
|
|
|
582 |
#endif
|
|
|
583 |
#ifndef MNG_SKIPCHUNK_iCCP
|
|
|
584 |
{MNG_UINT_iCCP, mng_init_general, mng_free_iccp, mng_read_iccp, mng_write_iccp, mng_assign_iccp, 0, 0, sizeof(mng_iccp)},
|
|
|
585 |
#endif
|
|
|
586 |
#ifndef MNG_SKIPCHUNK_iTXt
|
|
|
587 |
{MNG_UINT_iTXt, mng_init_general, mng_free_itxt, mng_read_itxt, mng_write_itxt, mng_assign_itxt, 0, 0, sizeof(mng_itxt)},
|
|
|
588 |
#endif
|
|
|
589 |
#ifdef MNG_INCLUDE_MPNG_PROPOSAL
|
|
|
590 |
{MNG_UINT_mpNG, mng_init_general, mng_free_mpng, mng_read_mpng, mng_write_mpng, mng_assign_mpng, 0, 0, sizeof(mng_mpng)},
|
|
|
591 |
#endif
|
|
|
592 |
#ifndef MNG_SKIPCHUNK_nEED
|
|
|
593 |
{MNG_UINT_nEED, mng_init_general, mng_free_need, mng_read_need, mng_write_need, mng_assign_need, 0, 0, sizeof(mng_need)},
|
|
|
594 |
#endif
|
|
|
595 |
/* TODO: {MNG_UINT_oFFs, 0, 0, 0, 0, 0, 0}, */
|
|
|
596 |
/* TODO: {MNG_UINT_pCAL, 0, 0, 0, 0, 0, 0}, */
|
|
|
597 |
#ifndef MNG_SKIPCHUNK_pHYg
|
|
|
598 |
{MNG_UINT_pHYg, mng_init_general, mng_free_general, mng_read_phyg, mng_write_phyg, mng_assign_general, 0, 0, sizeof(mng_phyg)},
|
|
|
599 |
#endif
|
|
|
600 |
#ifndef MNG_SKIPCHUNK_pHYs
|
|
|
601 |
{MNG_UINT_pHYs, mng_init_general, mng_free_general, mng_read_phys, mng_write_phys, mng_assign_general, 0, 0, sizeof(mng_phys)},
|
|
|
602 |
#endif
|
|
|
603 |
#ifndef MNG_SKIPCHUNK_sBIT
|
|
|
604 |
{MNG_UINT_sBIT, mng_init_general, mng_free_general, mng_read_sbit, mng_write_sbit, mng_assign_general, 0, 0, sizeof(mng_sbit)},
|
|
|
605 |
#endif
|
|
|
606 |
/* TODO: {MNG_UINT_sCAL, 0, 0, 0, 0, 0, 0}, */
|
|
|
607 |
#ifndef MNG_SKIPCHUNK_sPLT
|
|
|
608 |
{MNG_UINT_sPLT, mng_init_general, mng_free_splt, mng_read_splt, mng_write_splt, mng_assign_splt, 0, 0, sizeof(mng_splt)},
|
|
|
609 |
#endif
|
|
|
610 |
{MNG_UINT_sRGB, mng_init_general, mng_free_general, mng_read_srgb, mng_write_srgb, mng_assign_general, 0, 0, sizeof(mng_srgb)},
|
|
|
611 |
#ifndef MNG_SKIPCHUNK_tEXt
|
|
|
612 |
{MNG_UINT_tEXt, mng_init_general, mng_free_text, mng_read_text, mng_write_text, mng_assign_text, 0, 0, sizeof(mng_text)},
|
|
|
613 |
#endif
|
|
|
614 |
#ifndef MNG_SKIPCHUNK_tIME
|
|
|
615 |
{MNG_UINT_tIME, mng_init_general, mng_free_general, mng_read_time, mng_write_time, mng_assign_general, 0, 0, sizeof(mng_time)},
|
|
|
616 |
#endif
|
|
|
617 |
{MNG_UINT_tRNS, mng_init_general, mng_free_general, mng_read_trns, mng_write_trns, mng_assign_general, 0, 0, sizeof(mng_trns)},
|
|
|
618 |
#ifndef MNG_SKIPCHUNK_zTXt
|
|
|
619 |
{MNG_UINT_zTXt, mng_init_general, mng_free_ztxt, mng_read_ztxt, mng_write_ztxt, mng_assign_ztxt, 0, 0, sizeof(mng_ztxt)},
|
|
|
620 |
#endif
|
|
|
621 |
};
|
|
|
622 |
|
|
|
623 |
#else /* MNG_OPTIMIZE_CHUNKINITFREE */
|
|
|
624 |
|
|
|
625 |
mng_chunk_header mng_chunk_table [] =
|
|
|
626 |
{
|
|
|
627 |
#ifndef MNG_SKIPCHUNK_BACK
|
|
|
628 |
{MNG_UINT_BACK, mng_init_back, mng_free_back, mng_read_back, mng_write_back, mng_assign_back, 0, 0},
|
|
|
629 |
#endif
|
|
|
630 |
#ifndef MNG_SKIPCHUNK_BASI
|
|
|
631 |
{MNG_UINT_BASI, mng_init_basi, mng_free_basi, mng_read_basi, mng_write_basi, mng_assign_basi, 0, 0},
|
|
|
632 |
#endif
|
|
|
633 |
#ifndef MNG_SKIPCHUNK_CLIP
|
|
|
634 |
{MNG_UINT_CLIP, mng_init_clip, mng_free_clip, mng_read_clip, mng_write_clip, mng_assign_clip, 0, 0},
|
|
|
635 |
#endif
|
|
|
636 |
#ifndef MNG_SKIPCHUNK_CLON
|
|
|
637 |
{MNG_UINT_CLON, mng_init_clon, mng_free_clon, mng_read_clon, mng_write_clon, mng_assign_clon, 0, 0},
|
|
|
638 |
#endif
|
|
|
639 |
#ifndef MNG_NO_DELTA_PNG
|
|
|
640 |
#ifndef MNG_SKIPCHUNK_DBYK
|
|
|
641 |
{MNG_UINT_DBYK, mng_init_dbyk, mng_free_dbyk, mng_read_dbyk, mng_write_dbyk, mng_assign_dbyk, 0, 0},
|
|
|
642 |
#endif
|
|
|
643 |
#endif
|
|
|
644 |
#ifndef MNG_SKIPCHUNK_DEFI
|
|
|
645 |
{MNG_UINT_DEFI, mng_init_defi, mng_free_defi, mng_read_defi, mng_write_defi, mng_assign_defi, 0, 0},
|
|
|
646 |
#endif
|
|
|
647 |
#ifndef MNG_NO_DELTA_PNG
|
|
|
648 |
{MNG_UINT_DHDR, mng_init_dhdr, mng_free_dhdr, mng_read_dhdr, mng_write_dhdr, mng_assign_dhdr, 0, 0},
|
|
|
649 |
#endif
|
|
|
650 |
#ifndef MNG_SKIPCHUNK_DISC
|
|
|
651 |
{MNG_UINT_DISC, mng_init_disc, mng_free_disc, mng_read_disc, mng_write_disc, mng_assign_disc, 0, 0},
|
|
|
652 |
#endif
|
|
|
653 |
#ifndef MNG_NO_DELTA_PNG
|
|
|
654 |
#ifndef MNG_SKIPCHUNK_DROP
|
|
|
655 |
{MNG_UINT_DROP, mng_init_drop, mng_free_drop, mng_read_drop, mng_write_drop, mng_assign_drop, 0, 0},
|
|
|
656 |
#endif
|
|
|
657 |
#endif
|
|
|
658 |
#ifndef MNG_SKIPCHUNK_LOOP
|
|
|
659 |
{MNG_UINT_ENDL, mng_init_endl, mng_free_endl, mng_read_endl, mng_write_endl, mng_assign_endl, 0, 0},
|
|
|
660 |
#endif
|
|
|
661 |
#ifndef MNG_SKIPCHUNK_FRAM
|
|
|
662 |
{MNG_UINT_FRAM, mng_init_fram, mng_free_fram, mng_read_fram, mng_write_fram, mng_assign_fram, 0, 0},
|
|
|
663 |
#endif
|
|
|
664 |
{MNG_UINT_IDAT, mng_init_idat, mng_free_idat, mng_read_idat, mng_write_idat, mng_assign_idat, 0, 0}, /* 12-th element! */
|
|
|
665 |
{MNG_UINT_IEND, mng_init_iend, mng_free_iend, mng_read_iend, mng_write_iend, mng_assign_iend, 0, 0},
|
|
|
666 |
{MNG_UINT_IHDR, mng_init_ihdr, mng_free_ihdr, mng_read_ihdr, mng_write_ihdr, mng_assign_ihdr, 0, 0},
|
|
|
667 |
#ifndef MNG_NO_DELTA_PNG
|
|
|
668 |
#ifdef MNG_INCLUDE_JNG
|
|
|
669 |
{MNG_UINT_IJNG, mng_init_ijng, mng_free_ijng, mng_read_ijng, mng_write_ijng, mng_assign_ijng, 0, 0},
|
|
|
670 |
#endif
|
|
|
671 |
{MNG_UINT_IPNG, mng_init_ipng, mng_free_ipng, mng_read_ipng, mng_write_ipng, mng_assign_ipng, 0, 0},
|
|
|
672 |
#endif
|
|
|
673 |
#ifdef MNG_INCLUDE_JNG
|
|
|
674 |
{MNG_UINT_JDAA, mng_init_jdaa, mng_free_jdaa, mng_read_jdaa, mng_write_jdaa, mng_assign_jdaa, 0, 0},
|
|
|
675 |
{MNG_UINT_JDAT, mng_init_jdat, mng_free_jdat, mng_read_jdat, mng_write_jdat, mng_assign_jdat, 0, 0},
|
|
|
676 |
{MNG_UINT_JHDR, mng_init_jhdr, mng_free_jhdr, mng_read_jhdr, mng_write_jhdr, mng_assign_jhdr, 0, 0},
|
|
|
677 |
{MNG_UINT_JSEP, mng_init_jsep, mng_free_jsep, mng_read_jsep, mng_write_jsep, mng_assign_jsep, 0, 0},
|
|
|
678 |
{MNG_UINT_JdAA, mng_init_jdaa, mng_free_jdaa, mng_read_jdaa, mng_write_jdaa, mng_assign_jdaa, 0, 0},
|
|
|
679 |
#endif
|
|
|
680 |
#ifndef MNG_SKIPCHUNK_LOOP
|
|
|
681 |
{MNG_UINT_LOOP, mng_init_loop, mng_free_loop, mng_read_loop, mng_write_loop, mng_assign_loop, 0, 0},
|
|
|
682 |
#endif
|
|
|
683 |
#ifndef MNG_SKIPCHUNK_MAGN
|
|
|
684 |
{MNG_UINT_MAGN, mng_init_magn, mng_free_magn, mng_read_magn, mng_write_magn, mng_assign_magn, 0, 0},
|
|
|
685 |
#endif
|
|
|
686 |
{MNG_UINT_MEND, mng_init_mend, mng_free_mend, mng_read_mend, mng_write_mend, mng_assign_mend, 0, 0},
|
|
|
687 |
{MNG_UINT_MHDR, mng_init_mhdr, mng_free_mhdr, mng_read_mhdr, mng_write_mhdr, mng_assign_mhdr, 0, 0},
|
|
|
688 |
#ifndef MNG_SKIPCHUNK_MOVE
|
|
|
689 |
{MNG_UINT_MOVE, mng_init_move, mng_free_move, mng_read_move, mng_write_move, mng_assign_move, 0, 0},
|
|
|
690 |
#endif
|
|
|
691 |
#ifndef MNG_NO_DELTA_PNG
|
|
|
692 |
#ifndef MNG_SKIPCHUNK_ORDR
|
|
|
693 |
{MNG_UINT_ORDR, mng_init_ordr, mng_free_ordr, mng_read_ordr, mng_write_ordr, mng_assign_ordr, 0, 0},
|
|
|
694 |
#endif
|
|
|
695 |
#endif
|
|
|
696 |
#ifndef MNG_SKIPCHUNK_PAST
|
|
|
697 |
{MNG_UINT_PAST, mng_init_past, mng_free_past, mng_read_past, mng_write_past, mng_assign_past, 0, 0},
|
|
|
698 |
#endif
|
|
|
699 |
{MNG_UINT_PLTE, mng_init_plte, mng_free_plte, mng_read_plte, mng_write_plte, mng_assign_plte, 0, 0},
|
|
|
700 |
#ifndef MNG_NO_DELTA_PNG
|
|
|
701 |
{MNG_UINT_PPLT, mng_init_pplt, mng_free_pplt, mng_read_pplt, mng_write_pplt, mng_assign_pplt, 0, 0},
|
|
|
702 |
{MNG_UINT_PROM, mng_init_prom, mng_free_prom, mng_read_prom, mng_write_prom, mng_assign_prom, 0, 0},
|
|
|
703 |
#endif
|
|
|
704 |
#ifndef MNG_SKIPCHUNK_SAVE
|
|
|
705 |
{MNG_UINT_SAVE, mng_init_save, mng_free_save, mng_read_save, mng_write_save, mng_assign_save, 0, 0},
|
|
|
706 |
#endif
|
|
|
707 |
#ifndef MNG_SKIPCHUNK_SEEK
|
|
|
708 |
{MNG_UINT_SEEK, mng_init_seek, mng_free_seek, mng_read_seek, mng_write_seek, mng_assign_seek, 0, 0},
|
|
|
709 |
#endif
|
|
|
710 |
#ifndef MNG_SKIPCHUNK_SHOW
|
|
|
711 |
{MNG_UINT_SHOW, mng_init_show, mng_free_show, mng_read_show, mng_write_show, mng_assign_show, 0, 0},
|
|
|
712 |
#endif
|
|
|
713 |
#ifndef MNG_SKIPCHUNK_TERM
|
|
|
714 |
{MNG_UINT_TERM, mng_init_term, mng_free_term, mng_read_term, mng_write_term, mng_assign_term, 0, 0},
|
|
|
715 |
#endif
|
|
|
716 |
#ifndef MNG_SKIPCHUNK_bKGD
|
|
|
717 |
{MNG_UINT_bKGD, mng_init_bkgd, mng_free_bkgd, mng_read_bkgd, mng_write_bkgd, mng_assign_bkgd, 0, 0},
|
|
|
718 |
#endif
|
|
|
719 |
#ifndef MNG_SKIPCHUNK_cHRM
|
|
|
720 |
{MNG_UINT_cHRM, mng_init_chrm, mng_free_chrm, mng_read_chrm, mng_write_chrm, mng_assign_chrm, 0, 0},
|
|
|
721 |
#endif
|
|
|
722 |
#ifndef MNG_SKIPCHUNK_eXPI
|
|
|
723 |
{MNG_UINT_eXPI, mng_init_expi, mng_free_expi, mng_read_expi, mng_write_expi, mng_assign_expi, 0, 0},
|
|
|
724 |
#endif
|
|
|
725 |
#ifndef MNG_SKIPCHUNK_evNT
|
|
|
726 |
{MNG_UINT_evNT, mng_init_evnt, mng_free_evnt, mng_read_evnt, mng_write_evnt, mng_assign_evnt, 0, 0},
|
|
|
727 |
#endif
|
|
|
728 |
#ifndef MNG_SKIPCHUNK_fPRI
|
|
|
729 |
{MNG_UINT_fPRI, mng_init_fpri, mng_free_fpri, mng_read_fpri, mng_write_fpri, mng_assign_fpri, 0, 0},
|
|
|
730 |
#endif
|
|
|
731 |
#ifndef MNG_SKIPCHUNK_gAMA
|
|
|
732 |
{MNG_UINT_gAMA, mng_init_gama, mng_free_gama, mng_read_gama, mng_write_gama, mng_assign_gama, 0, 0},
|
|
|
733 |
#endif
|
|
|
734 |
#ifndef MNG_SKIPCHUNK_hIST
|
|
|
735 |
{MNG_UINT_hIST, mng_init_hist, mng_free_hist, mng_read_hist, mng_write_hist, mng_assign_hist, 0, 0},
|
|
|
736 |
#endif
|
|
|
737 |
#ifndef MNG_SKIPCHUNK_iCCP
|
|
|
738 |
{MNG_UINT_iCCP, mng_init_iccp, mng_free_iccp, mng_read_iccp, mng_write_iccp, mng_assign_iccp, 0, 0},
|
|
|
739 |
#endif
|
|
|
740 |
#ifndef MNG_SKIPCHUNK_iTXt
|
|
|
741 |
{MNG_UINT_iTXt, mng_init_itxt, mng_free_itxt, mng_read_itxt, mng_write_itxt, mng_assign_itxt, 0, 0},
|
|
|
742 |
#endif
|
|
|
743 |
#ifndef MNG_SKIPCHUNK_nEED
|
|
|
744 |
{MNG_UINT_nEED, mng_init_need, mng_free_need, mng_read_need, mng_write_need, mng_assign_need, 0, 0},
|
|
|
745 |
#endif
|
|
|
746 |
/* TODO: {MNG_UINT_oFFs, 0, 0, 0, 0, 0, 0}, */
|
|
|
747 |
/* TODO: {MNG_UINT_pCAL, 0, 0, 0, 0, 0, 0}, */
|
|
|
748 |
#ifndef MNG_SKIPCHUNK_pHYg
|
|
|
749 |
{MNG_UINT_pHYg, mng_init_phyg, mng_free_phyg, mng_read_phyg, mng_write_phyg, mng_assign_phyg, 0, 0},
|
|
|
750 |
#endif
|
|
|
751 |
#ifndef MNG_SKIPCHUNK_pHYs
|
|
|
752 |
{MNG_UINT_pHYs, mng_init_phys, mng_free_phys, mng_read_phys, mng_write_phys, mng_assign_phys, 0, 0},
|
|
|
753 |
#endif
|
|
|
754 |
#ifndef MNG_SKIPCHUNK_sBIT
|
|
|
755 |
{MNG_UINT_sBIT, mng_init_sbit, mng_free_sbit, mng_read_sbit, mng_write_sbit, mng_assign_sbit, 0, 0},
|
|
|
756 |
#endif
|
|
|
757 |
/* TODO: {MNG_UINT_sCAL, 0, 0, 0, 0, 0, 0}, */
|
|
|
758 |
#ifndef MNG_SKIPCHUNK_sPLT
|
|
|
759 |
{MNG_UINT_sPLT, mng_init_splt, mng_free_splt, mng_read_splt, mng_write_splt, mng_assign_splt, 0, 0},
|
|
|
760 |
#endif
|
|
|
761 |
{MNG_UINT_sRGB, mng_init_srgb, mng_free_srgb, mng_read_srgb, mng_write_srgb, mng_assign_srgb, 0, 0},
|
|
|
762 |
#ifndef MNG_SKIPCHUNK_tEXt
|
|
|
763 |
{MNG_UINT_tEXt, mng_init_text, mng_free_text, mng_read_text, mng_write_text, mng_assign_text, 0, 0},
|
|
|
764 |
#endif
|
|
|
765 |
#ifndef MNG_SKIPCHUNK_tIME
|
|
|
766 |
{MNG_UINT_tIME, mng_init_time, mng_free_time, mng_read_time, mng_write_time, mng_assign_time, 0, 0},
|
|
|
767 |
#endif
|
|
|
768 |
{MNG_UINT_tRNS, mng_init_trns, mng_free_trns, mng_read_trns, mng_write_trns, mng_assign_trns, 0, 0},
|
|
|
769 |
#ifndef MNG_SKIPCHUNK_zTXt
|
|
|
770 |
{MNG_UINT_zTXt, mng_init_ztxt, mng_free_ztxt, mng_read_ztxt, mng_write_ztxt, mng_assign_ztxt, 0, 0},
|
|
|
771 |
#endif
|
|
|
772 |
};
|
|
|
773 |
|
|
|
774 |
#endif /* MNG_OPTIMIZE_CHUNKINITFREE */
|
|
|
775 |
|
|
|
776 |
/* binary search variables */
|
|
|
777 |
mng_int32 iTop, iLower, iUpper, iMiddle;
|
|
|
778 |
mng_chunk_headerp pEntry; /* pointer to found entry */
|
|
|
779 |
#else
|
|
|
780 |
mng_chunk_header sEntry; /* temp chunk-header */
|
|
|
781 |
#endif /* MNG_OPTIMIZE_CHUNKREADER */
|
|
|
782 |
|
|
|
783 |
mng_chunkid iChunkname; /* the chunk's tag */
|
|
|
784 |
mng_chunkp pChunk; /* chunk structure (if #define MNG_STORE_CHUNKS) */
|
|
|
785 |
mng_retcode iRetcode; /* temporary error-code */
|
|
|
786 |
|
|
|
787 |
#ifdef MNG_SUPPORT_TRACE
|
|
|
788 |
MNG_TRACE (pData, MNG_FN_PROCESS_RAW_CHUNK, MNG_LC_START);
|
|
|
789 |
#endif
|
|
|
790 |
/* reset timer indicator on read-cycle */
|
|
|
791 |
if ((pData->bReading) && (!pData->bDisplaying))
|
|
|
792 |
pData->bTimerset = MNG_FALSE;
|
|
|
793 |
/* get the chunkname */
|
|
|
794 |
iChunkname = (mng_chunkid)(mng_get_uint32 (pBuf));
|
|
|
795 |
|
|
|
796 |
pBuf += sizeof (mng_chunkid); /* adjust the buffer */
|
|
|
797 |
iBuflen -= sizeof (mng_chunkid);
|
|
|
798 |
pChunk = 0;
|
|
|
799 |
|
|
|
800 |
#ifndef MNG_OPTIMIZE_CHUNKREADER
|
|
|
801 |
/* determine max index of table */
|
|
|
802 |
iTop = (sizeof (mng_chunk_table) / sizeof (mng_chunk_table [0])) - 1;
|
|
|
803 |
|
|
|
804 |
/* binary search; with 54 chunks, worst-case is 7 comparisons */
|
|
|
805 |
iLower = 0;
|
|
|
806 |
#ifndef MNG_NO_DELTA_PNG
|
|
|
807 |
iMiddle = 11; /* start with the IDAT entry */
|
|
|
808 |
#else
|
|
|
809 |
iMiddle = 8;
|
|
|
810 |
#endif
|
|
|
811 |
iUpper = iTop;
|
|
|
812 |
pEntry = 0; /* no goods yet! */
|
|
|
813 |
|
|
|
814 |
do /* the binary search itself */
|
|
|
815 |
{
|
|
|
816 |
if (mng_chunk_table [iMiddle].iChunkname < iChunkname)
|
|
|
817 |
iLower = iMiddle + 1;
|
|
|
818 |
else if (mng_chunk_table [iMiddle].iChunkname > iChunkname)
|
|
|
819 |
iUpper = iMiddle - 1;
|
|
|
820 |
else
|
|
|
821 |
{
|
|
|
822 |
pEntry = &mng_chunk_table [iMiddle];
|
|
|
823 |
break;
|
|
|
824 |
}
|
|
|
825 |
|
|
|
826 |
iMiddle = (iLower + iUpper) >> 1;
|
|
|
827 |
}
|
|
|
828 |
while (iLower <= iUpper);
|
|
|
829 |
|
|
|
830 |
if (!pEntry) /* unknown chunk ? */
|
|
|
831 |
pEntry = &mng_chunk_unknown; /* make it so! */
|
|
|
832 |
|
|
|
833 |
#else /* MNG_OPTIMIZE_CHUNKREADER */
|
|
|
834 |
|
|
|
835 |
mng_get_chunkheader (iChunkname, &sEntry);
|
|
|
836 |
|
|
|
837 |
#endif /* MNG_OPTIMIZE_CHUNKREADER */
|
|
|
838 |
|
|
|
839 |
pData->iChunkname = iChunkname; /* keep track of where we are */
|
|
|
840 |
pData->iChunkseq++;
|
|
|
841 |
|
|
|
842 |
#ifndef MNG_OPTIMIZE_CHUNKREADER
|
|
|
843 |
if (pEntry->fRead) /* read-callback available ? */
|
|
|
844 |
{
|
|
|
845 |
iRetcode = pEntry->fRead (pData, pEntry, iBuflen, (mng_ptr)pBuf, &pChunk);
|
|
|
846 |
|
|
|
847 |
if (!iRetcode) /* everything oke ? */
|
|
|
848 |
{ /* remember unknown chunk's id */
|
|
|
849 |
if ((pChunk) && (pEntry->iChunkname == MNG_UINT_HUH))
|
|
|
850 |
((mng_chunk_headerp)pChunk)->iChunkname = iChunkname;
|
|
|
851 |
}
|
|
|
852 |
}
|
|
|
853 |
#else /* MNG_OPTIMIZE_CHUNKREADER */
|
|
|
854 |
if (sEntry.fRead) /* read-callback available ? */
|
|
|
855 |
{
|
|
|
856 |
iRetcode = sEntry.fRead (pData, &sEntry, iBuflen, (mng_ptr)pBuf, &pChunk);
|
|
|
857 |
|
|
|
858 |
#ifndef MNG_OPTIMIZE_CHUNKREADER
|
|
|
859 |
if (!iRetcode) /* everything oke ? */
|
|
|
860 |
{ /* remember unknown chunk's id */
|
|
|
861 |
if ((pChunk) && (sEntry.iChunkname == MNG_UINT_HUH))
|
|
|
862 |
((mng_chunk_headerp)pChunk)->iChunkname = iChunkname;
|
|
|
863 |
}
|
|
|
864 |
#endif
|
|
|
865 |
}
|
|
|
866 |
#endif /* MNG_OPTIMIZE_CHUNKREADER */
|
|
|
867 |
else
|
|
|
868 |
iRetcode = MNG_NOERROR;
|
|
|
869 |
|
|
|
870 |
if (pChunk) /* store this chunk ? */
|
|
|
871 |
mng_add_chunk (pData, pChunk); /* do it */
|
|
|
872 |
|
|
|
873 |
#ifdef MNG_INCLUDE_JNG /* implicit EOF ? */
|
|
|
874 |
if ((!pData->bHasMHDR) && (!pData->bHasIHDR) && (!pData->bHasJHDR))
|
|
|
875 |
#else
|
|
|
876 |
if ((!pData->bHasMHDR) && (!pData->bHasIHDR))
|
|
|
877 |
#endif
|
|
|
878 |
iRetcode = mng_process_eof (pData);/* then do some EOF processing */
|
|
|
879 |
|
|
|
880 |
if (iRetcode) /* on error bail out */
|
|
|
881 |
return iRetcode;
|
|
|
882 |
|
|
|
883 |
#ifdef MNG_SUPPORT_TRACE
|
|
|
884 |
MNG_TRACE (pData, MNG_FN_PROCESS_RAW_CHUNK, MNG_LC_END);
|
|
|
885 |
#endif
|
|
|
886 |
|
|
|
887 |
return MNG_NOERROR;
|
|
|
888 |
}
|
|
|
889 |
|
|
|
890 |
/* ************************************************************************** */
|
|
|
891 |
|
|
|
892 |
MNG_LOCAL mng_retcode check_chunk_crc (mng_datap pData,
|
|
|
893 |
mng_uint8p pBuf,
|
|
|
894 |
mng_uint32 iBuflen)
|
|
|
895 |
{
|
|
|
896 |
mng_uint32 iCrc; /* calculated CRC */
|
|
|
897 |
mng_bool bDiscard = MNG_FALSE;
|
|
|
898 |
mng_retcode iRetcode = MNG_NOERROR;
|
|
|
899 |
|
|
|
900 |
#ifdef MNG_SUPPORT_TRACE
|
|
|
901 |
MNG_TRACE (pData, MNG_FN_READ_CHUNK_CRC, MNG_LC_START);
|
|
|
902 |
#endif
|
|
|
903 |
|
|
|
904 |
if (pData->iCrcmode & MNG_CRC_INPUT) /* crc included ? */
|
|
|
905 |
{
|
|
|
906 |
mng_bool bCritical = (mng_bool)((*pBuf & 0x20) == 0);
|
|
|
907 |
mng_uint32 iL = iBuflen - (mng_uint32)(sizeof (iCrc));
|
|
|
908 |
|
|
|
909 |
if (((bCritical ) && (pData->iCrcmode & MNG_CRC_CRITICAL )) ||
|
|
|
910 |
((!bCritical) && (pData->iCrcmode & MNG_CRC_ANCILLARY)))
|
|
|
911 |
{ /* calculate the crc */
|
|
|
912 |
iCrc = mng_crc (pData, pBuf, iL);
|
|
|
913 |
/* and check it */
|
|
|
914 |
if (!(iCrc == mng_get_uint32 (pBuf + iL)))
|
|
|
915 |
{
|
|
|
916 |
mng_bool bWarning = MNG_FALSE;
|
|
|
917 |
mng_bool bError = MNG_FALSE;
|
|
|
918 |
|
|
|
919 |
if (bCritical)
|
|
|
920 |
{
|
|
|
921 |
switch (pData->iCrcmode & MNG_CRC_CRITICAL)
|
|
|
922 |
{
|
|
|
923 |
case MNG_CRC_CRITICAL_WARNING : { bWarning = MNG_TRUE; break; }
|
|
|
924 |
case MNG_CRC_CRITICAL_ERROR : { bError = MNG_TRUE; break; }
|
|
|
925 |
}
|
|
|
926 |
}
|
|
|
927 |
else
|
|
|
928 |
{
|
|
|
929 |
switch (pData->iCrcmode & MNG_CRC_ANCILLARY)
|
|
|
930 |
{
|
|
|
931 |
case MNG_CRC_ANCILLARY_DISCARD : { bDiscard = MNG_TRUE; break; }
|
|
|
932 |
case MNG_CRC_ANCILLARY_WARNING : { bWarning = MNG_TRUE; break; }
|
|
|
933 |
case MNG_CRC_ANCILLARY_ERROR : { bError = MNG_TRUE; break; }
|
|
|
934 |
}
|
|
|
935 |
}
|
|
|
936 |
|
|
|
937 |
if (bWarning)
|
|
|
938 |
MNG_WARNING (pData, MNG_INVALIDCRC);
|
|
|
939 |
if (bError)
|
|
|
940 |
MNG_ERROR (pData, MNG_INVALIDCRC);
|
|
|
941 |
}
|
|
|
942 |
}
|
|
|
943 |
|
|
|
944 |
if (!bDiscard) /* still processing ? */
|
|
|
945 |
iRetcode = process_raw_chunk (pData, pBuf, iL);
|
|
|
946 |
}
|
|
|
947 |
else
|
|
|
948 |
{ /* no crc => straight onto processing */
|
|
|
949 |
iRetcode = process_raw_chunk (pData, pBuf, iBuflen);
|
|
|
950 |
}
|
|
|
951 |
|
|
|
952 |
#ifdef MNG_SUPPORT_TRACE
|
|
|
953 |
MNG_TRACE (pData, MNG_FN_READ_CHUNK_CRC, MNG_LC_END);
|
|
|
954 |
#endif
|
|
|
955 |
|
|
|
956 |
return iRetcode;
|
|
|
957 |
}
|
|
|
958 |
|
|
|
959 |
/* ************************************************************************** */
|
|
|
960 |
|
|
|
961 |
MNG_LOCAL mng_retcode read_chunk (mng_datap pData)
|
|
|
962 |
{
|
|
|
963 |
mng_uint32 iBufmax = pData->iReadbufsize;
|
|
|
964 |
mng_uint8p pBuf = pData->pReadbuf;
|
|
|
965 |
mng_uint32 iBuflen = 0; /* number of bytes requested */
|
|
|
966 |
mng_uint32 iRead = 0; /* number of bytes read */
|
|
|
967 |
mng_retcode iRetcode = MNG_NOERROR;
|
|
|
968 |
|
|
|
969 |
#ifdef MNG_SUPPORT_TRACE
|
|
|
970 |
MNG_TRACE (pData, MNG_FN_READ_CHUNK, MNG_LC_START);
|
|
|
971 |
#endif
|
|
|
972 |
|
|
|
973 |
#ifdef MNG_SUPPORT_DISPLAY
|
|
|
974 |
if (pData->pCurraniobj) /* processing an animation object ? */
|
|
|
975 |
{
|
|
|
976 |
do /* process it then */
|
|
|
977 |
{
|
|
|
978 |
iRetcode = ((mng_object_headerp)pData->pCurraniobj)->fProcess (pData, pData->pCurraniobj);
|
|
|
979 |
/* refresh needed ? */
|
|
|
980 |
/* if ((!iRetcode) && (!pData->bTimerset) && (pData->bNeedrefresh))
|
|
|
981 |
iRetcode = display_progressive_refresh (pData, 1); */
|
|
|
982 |
/* can we advance to next object ? */
|
|
|
983 |
if ((!iRetcode) && (pData->pCurraniobj) &&
|
|
|
984 |
(!pData->bTimerset) && (!pData->bSectionwait))
|
|
|
985 |
{ /* reset timer indicator on read-cycle */
|
|
|
986 |
if ((pData->bReading) && (!pData->bDisplaying))
|
|
|
987 |
pData->bTimerset = MNG_FALSE;
|
|
|
988 |
|
|
|
989 |
pData->pCurraniobj = ((mng_object_headerp)pData->pCurraniobj)->pNext;
|
|
|
990 |
/* TERM processing to be done ? */
|
|
|
991 |
if ((!pData->pCurraniobj) && (pData->bHasTERM) && (!pData->bHasMHDR))
|
|
|
992 |
iRetcode = mng_process_display_mend (pData);
|
|
|
993 |
}
|
|
|
994 |
} /* until error or a break or no more objects */
|
|
|
995 |
while ((!iRetcode) && (pData->pCurraniobj) &&
|
|
|
996 |
(!pData->bTimerset) && (!pData->bSectionwait) && (!pData->bFreezing));
|
|
|
997 |
}
|
|
|
998 |
else
|
|
|
999 |
{
|
|
|
1000 |
if (pData->iBreakpoint) /* do we need to finish something first ? */
|
|
|
1001 |
{
|
|
|
1002 |
switch (pData->iBreakpoint) /* return to broken display routine */
|
|
|
1003 |
{
|
|
|
1004 |
#ifndef MNG_SKIPCHUNK_FRAM
|
|
|
1005 |
case 1 : { iRetcode = mng_process_display_fram2 (pData); break; }
|
|
|
1006 |
#endif
|
|
|
1007 |
case 2 : { iRetcode = mng_process_display_ihdr (pData); break; }
|
|
|
1008 |
#ifndef MNG_SKIPCHUNK_SHOW
|
|
|
1009 |
case 3 : ; /* same as 4 !!! */
|
|
|
1010 |
case 4 : { iRetcode = mng_process_display_show (pData); break; }
|
|
|
1011 |
#endif
|
|
|
1012 |
#ifndef MNG_SKIPCHUNK_CLON
|
|
|
1013 |
case 5 : { iRetcode = mng_process_display_clon2 (pData); break; }
|
|
|
1014 |
#endif
|
|
|
1015 |
#ifdef MNG_INCLUDE_JNG
|
|
|
1016 |
case 7 : { iRetcode = mng_process_display_jhdr (pData); break; }
|
|
|
1017 |
#endif
|
|
|
1018 |
case 6 : ; /* same as 8 !!! */
|
|
|
1019 |
case 8 : { iRetcode = mng_process_display_iend (pData); break; }
|
|
|
1020 |
#ifndef MNG_SKIPCHUNK_MAGN
|
|
|
1021 |
case 9 : { iRetcode = mng_process_display_magn2 (pData); break; }
|
|
|
1022 |
#endif
|
|
|
1023 |
case 10 : { iRetcode = mng_process_display_mend2 (pData); break; }
|
|
|
1024 |
#ifndef MNG_SKIPCHUNK_PAST
|
|
|
1025 |
case 11 : { iRetcode = mng_process_display_past2 (pData); break; }
|
|
|
1026 |
#endif
|
|
|
1027 |
}
|
|
|
1028 |
}
|
|
|
1029 |
}
|
|
|
1030 |
|
|
|
1031 |
if (iRetcode) /* on error bail out */
|
|
|
1032 |
return iRetcode;
|
|
|
1033 |
|
|
|
1034 |
#endif /* MNG_SUPPORT_DISPLAY */
|
|
|
1035 |
/* can we continue processing now, or do we */
|
|
|
1036 |
/* need to wait for the timer to finish (again) ? */
|
|
|
1037 |
#ifdef MNG_SUPPORT_DISPLAY
|
|
|
1038 |
if ((!pData->bTimerset) && (!pData->bSectionwait) && (!pData->bEOF))
|
|
|
1039 |
#else
|
|
|
1040 |
if (!pData->bEOF)
|
|
|
1041 |
#endif
|
|
|
1042 |
{
|
|
|
1043 |
#ifdef MNG_SUPPORT_DISPLAY
|
|
|
1044 |
/* freezing in progress ? */
|
|
|
1045 |
if ((pData->bFreezing) && (pData->iSuspendpoint == 0))
|
|
|
1046 |
pData->bRunning = MNG_FALSE; /* then this is the right moment to do it */
|
|
|
1047 |
#endif
|
|
|
1048 |
|
|
|
1049 |
if (pData->iSuspendpoint <= 2)
|
|
|
1050 |
{
|
|
|
1051 |
iBuflen = sizeof (mng_uint32); /* read length */
|
|
|
1052 |
iRetcode = read_databuffer (pData, pBuf, &pData->pReadbufnext, iBuflen, &iRead);
|
|
|
1053 |
|
|
|
1054 |
if (iRetcode) /* bail on errors */
|
|
|
1055 |
return iRetcode;
|
|
|
1056 |
|
|
|
1057 |
if (pData->bSuspended) /* suspended ? */
|
|
|
1058 |
pData->iSuspendpoint = 2;
|
|
|
1059 |
else /* save the length */
|
|
|
1060 |
{
|
|
|
1061 |
pData->iChunklen = mng_get_uint32 (pBuf);
|
|
|
1062 |
if (pData->iChunklen > 0x7ffffff)
|
|
|
1063 |
return MNG_INVALIDLENGTH;
|
|
|
1064 |
}
|
|
|
1065 |
|
|
|
1066 |
}
|
|
|
1067 |
|
|
|
1068 |
if (!pData->bSuspended) /* still going ? */
|
|
|
1069 |
{ /* previously suspended or not eof ? */
|
|
|
1070 |
if ((pData->iSuspendpoint > 2) || (iRead == iBuflen))
|
|
|
1071 |
{ /* determine length chunkname + data (+ crc) */
|
|
|
1072 |
if (pData->iCrcmode & MNG_CRC_INPUT)
|
|
|
1073 |
iBuflen = pData->iChunklen + (mng_uint32)(sizeof (mng_chunkid) + sizeof (mng_uint32));
|
|
|
1074 |
else
|
|
|
1075 |
iBuflen = pData->iChunklen + (mng_uint32)(sizeof (mng_chunkid));
|
|
|
1076 |
|
|
|
1077 |
/* do we have enough data in the current push buffer ? */
|
|
|
1078 |
if ((pData->pFirstpushdata) && (iBuflen <= pData->pFirstpushdata->iRemaining))
|
|
|
1079 |
{
|
|
|
1080 |
mng_pushdatap pPush = pData->pFirstpushdata;
|
|
|
1081 |
pBuf = pPush->pDatanext;
|
|
|
1082 |
pPush->pDatanext += iBuflen;
|
|
|
1083 |
pPush->iRemaining -= iBuflen;
|
|
|
1084 |
pData->iSuspendpoint = 0; /* safely reset this here ! */
|
|
|
1085 |
|
|
|
1086 |
iRetcode = check_chunk_crc (pData, pBuf, iBuflen);
|
|
|
1087 |
if (iRetcode)
|
|
|
1088 |
return iRetcode;
|
|
|
1089 |
|
|
|
1090 |
if (!pPush->iRemaining) /* buffer depleted? then release it */
|
|
|
1091 |
iRetcode = mng_release_pushdata (pData);
|
|
|
1092 |
}
|
|
|
1093 |
else
|
|
|
1094 |
{
|
|
|
1095 |
if (iBuflen < iBufmax) /* does it fit in default buffer ? */
|
|
|
1096 |
{ /* note that we don't use the full size
|
|
|
1097 |
so there's always a zero-byte at the
|
|
|
1098 |
very end !!! */
|
|
|
1099 |
iRetcode = read_databuffer (pData, pBuf, &pData->pReadbufnext, iBuflen, &iRead);
|
|
|
1100 |
if (iRetcode) /* bail on errors */
|
|
|
1101 |
return iRetcode;
|
|
|
1102 |
|
|
|
1103 |
if (pData->bSuspended) /* suspended ? */
|
|
|
1104 |
pData->iSuspendpoint = 3;
|
|
|
1105 |
else
|
|
|
1106 |
{
|
|
|
1107 |
if (iRead != iBuflen) /* did we get all the data ? */
|
|
|
1108 |
MNG_ERROR (pData, MNG_UNEXPECTEDEOF);
|
|
|
1109 |
iRetcode = check_chunk_crc (pData, pBuf, iBuflen);
|
|
|
1110 |
}
|
|
|
1111 |
}
|
|
|
1112 |
else
|
|
|
1113 |
{
|
|
|
1114 |
if (iBuflen > 16777216) /* is the length incredible? */
|
|
|
1115 |
MNG_ERROR (pData, MNG_IMPROBABLELENGTH);
|
|
|
1116 |
|
|
|
1117 |
if (!pData->iSuspendpoint) /* create additional large buffer ? */
|
|
|
1118 |
{ /* again reserve space for the last zero-byte */
|
|
|
1119 |
pData->iLargebufsize = iBuflen + 1;
|
|
|
1120 |
pData->pLargebufnext = MNG_NULL;
|
|
|
1121 |
MNG_ALLOC (pData, pData->pLargebuf, pData->iLargebufsize);
|
|
|
1122 |
}
|
|
|
1123 |
|
|
|
1124 |
iRetcode = read_databuffer (pData, pData->pLargebuf, &pData->pLargebufnext, iBuflen, &iRead);
|
|
|
1125 |
if (iRetcode)
|
|
|
1126 |
return iRetcode;
|
|
|
1127 |
|
|
|
1128 |
if (pData->bSuspended) /* suspended ? */
|
|
|
1129 |
pData->iSuspendpoint = 4;
|
|
|
1130 |
else
|
|
|
1131 |
{
|
|
|
1132 |
if (iRead != iBuflen) /* did we get all the data ? */
|
|
|
1133 |
MNG_ERROR (pData, MNG_UNEXPECTEDEOF);
|
|
|
1134 |
iRetcode = check_chunk_crc (pData, pData->pLargebuf, iBuflen);
|
|
|
1135 |
/* cleanup additional large buffer */
|
|
|
1136 |
MNG_FREE (pData, pData->pLargebuf, pData->iLargebufsize);
|
|
|
1137 |
}
|
|
|
1138 |
}
|
|
|
1139 |
}
|
|
|
1140 |
|
|
|
1141 |
if (iRetcode) /* on error bail out */
|
|
|
1142 |
return iRetcode;
|
|
|
1143 |
|
|
|
1144 |
}
|
|
|
1145 |
else
|
|
|
1146 |
{ /* that's final */
|
|
|
1147 |
iRetcode = mng_process_eof (pData);
|
|
|
1148 |
|
|
|
1149 |
if (iRetcode) /* on error bail out */
|
|
|
1150 |
return iRetcode;
|
|
|
1151 |
|
|
|
1152 |
if ((iRead != 0) || /* did we get an unexpected eof ? */
|
|
|
1153 |
#ifdef MNG_INCLUDE_JNG
|
|
|
1154 |
(pData->bHasIHDR || pData->bHasMHDR || pData->bHasJHDR))
|
|
|
1155 |
#else
|
|
|
1156 |
(pData->bHasIHDR || pData->bHasMHDR))
|
|
|
1157 |
#endif
|
|
|
1158 |
MNG_ERROR (pData, MNG_UNEXPECTEDEOF);
|
|
|
1159 |
}
|
|
|
1160 |
}
|
|
|
1161 |
}
|
|
|
1162 |
|
|
|
1163 |
#ifdef MNG_SUPPORT_DISPLAY /* refresh needed ? */
|
|
|
1164 |
if ((!pData->bTimerset) && (!pData->bSuspended) && (pData->bNeedrefresh))
|
|
|
1165 |
{
|
|
|
1166 |
iRetcode = mng_display_progressive_refresh (pData, 1);
|
|
|
1167 |
|
|
|
1168 |
if (iRetcode) /* on error bail out */
|
|
|
1169 |
return iRetcode;
|
|
|
1170 |
}
|
|
|
1171 |
#endif
|
|
|
1172 |
|
|
|
1173 |
#ifdef MNG_SUPPORT_TRACE
|
|
|
1174 |
MNG_TRACE (pData, MNG_FN_READ_CHUNK, MNG_LC_END);
|
|
|
1175 |
#endif
|
|
|
1176 |
|
|
|
1177 |
return MNG_NOERROR;
|
|
|
1178 |
}
|
|
|
1179 |
|
|
|
1180 |
/* ************************************************************************** */
|
|
|
1181 |
|
|
|
1182 |
MNG_LOCAL mng_retcode process_pushedchunk (mng_datap pData)
|
|
|
1183 |
{
|
|
|
1184 |
mng_pushdatap pPush;
|
|
|
1185 |
mng_retcode iRetcode = MNG_NOERROR;
|
|
|
1186 |
|
|
|
1187 |
#ifdef MNG_SUPPORT_DISPLAY
|
|
|
1188 |
if (pData->pCurraniobj) /* processing an animation object ? */
|
|
|
1189 |
{
|
|
|
1190 |
do /* process it then */
|
|
|
1191 |
{
|
|
|
1192 |
iRetcode = ((mng_object_headerp)pData->pCurraniobj)->fProcess (pData, pData->pCurraniobj);
|
|
|
1193 |
/* refresh needed ? */
|
|
|
1194 |
/* if ((!iRetcode) && (!pData->bTimerset) && (pData->bNeedrefresh))
|
|
|
1195 |
iRetcode = display_progressive_refresh (pData, 1); */
|
|
|
1196 |
/* can we advance to next object ? */
|
|
|
1197 |
if ((!iRetcode) && (pData->pCurraniobj) &&
|
|
|
1198 |
(!pData->bTimerset) && (!pData->bSectionwait))
|
|
|
1199 |
{ /* reset timer indicator on read-cycle */
|
|
|
1200 |
if ((pData->bReading) && (!pData->bDisplaying))
|
|
|
1201 |
pData->bTimerset = MNG_FALSE;
|
|
|
1202 |
|
|
|
1203 |
pData->pCurraniobj = ((mng_object_headerp)pData->pCurraniobj)->pNext;
|
|
|
1204 |
/* TERM processing to be done ? */
|
|
|
1205 |
if ((!pData->pCurraniobj) && (pData->bHasTERM) && (!pData->bHasMHDR))
|
|
|
1206 |
iRetcode = mng_process_display_mend (pData);
|
|
|
1207 |
}
|
|
|
1208 |
} /* until error or a break or no more objects */
|
|
|
1209 |
while ((!iRetcode) && (pData->pCurraniobj) &&
|
|
|
1210 |
(!pData->bTimerset) && (!pData->bSectionwait) && (!pData->bFreezing));
|
|
|
1211 |
}
|
|
|
1212 |
else
|
|
|
1213 |
{
|
|
|
1214 |
if (pData->iBreakpoint) /* do we need to finish something first ? */
|
|
|
1215 |
{
|
|
|
1216 |
switch (pData->iBreakpoint) /* return to broken display routine */
|
|
|
1217 |
{
|
|
|
1218 |
#ifndef MNG_SKIPCHUNK_FRAM
|
|
|
1219 |
case 1 : { iRetcode = mng_process_display_fram2 (pData); break; }
|
|
|
1220 |
#endif
|
|
|
1221 |
case 2 : { iRetcode = mng_process_display_ihdr (pData); break; }
|
|
|
1222 |
#ifndef MNG_SKIPCHUNK_SHOW
|
|
|
1223 |
case 3 : ; /* same as 4 !!! */
|
|
|
1224 |
case 4 : { iRetcode = mng_process_display_show (pData); break; }
|
|
|
1225 |
#endif
|
|
|
1226 |
#ifndef MNG_SKIPCHUNK_CLON
|
|
|
1227 |
case 5 : { iRetcode = mng_process_display_clon2 (pData); break; }
|
|
|
1228 |
#endif
|
|
|
1229 |
#ifdef MNG_INCLUDE_JNG
|
|
|
1230 |
case 7 : { iRetcode = mng_process_display_jhdr (pData); break; }
|
|
|
1231 |
#endif
|
|
|
1232 |
case 6 : ; /* same as 8 !!! */
|
|
|
1233 |
case 8 : { iRetcode = mng_process_display_iend (pData); break; }
|
|
|
1234 |
#ifndef MNG_SKIPCHUNK_MAGN
|
|
|
1235 |
case 9 : { iRetcode = mng_process_display_magn2 (pData); break; }
|
|
|
1236 |
#endif
|
|
|
1237 |
case 10 : { iRetcode = mng_process_display_mend2 (pData); break; }
|
|
|
1238 |
#ifndef MNG_SKIPCHUNK_PAST
|
|
|
1239 |
case 11 : { iRetcode = mng_process_display_past2 (pData); break; }
|
|
|
1240 |
#endif
|
|
|
1241 |
}
|
|
|
1242 |
}
|
|
|
1243 |
}
|
|
|
1244 |
|
|
|
1245 |
if (iRetcode) /* on error bail out */
|
|
|
1246 |
return iRetcode;
|
|
|
1247 |
|
|
|
1248 |
#endif /* MNG_SUPPORT_DISPLAY */
|
|
|
1249 |
/* can we continue processing now, or do we */
|
|
|
1250 |
/* need to wait for the timer to finish (again) ? */
|
|
|
1251 |
#ifdef MNG_SUPPORT_DISPLAY
|
|
|
1252 |
if ((!pData->bTimerset) && (!pData->bSectionwait) && (!pData->bEOF))
|
|
|
1253 |
#else
|
|
|
1254 |
if (!pData->bEOF)
|
|
|
1255 |
#endif
|
|
|
1256 |
{
|
|
|
1257 |
pData->iSuspendpoint = 0; /* safely reset it here ! */
|
|
|
1258 |
pPush = pData->pFirstpushchunk;
|
|
|
1259 |
|
|
|
1260 |
iRetcode = process_raw_chunk (pData, pPush->pData, pPush->iLength);
|
|
|
1261 |
if (iRetcode)
|
|
|
1262 |
return iRetcode;
|
|
|
1263 |
|
|
|
1264 |
#ifdef MNG_SUPPORT_DISPLAY /* refresh needed ? */
|
|
|
1265 |
if ((!pData->bTimerset) && (!pData->bSuspended) && (pData->bNeedrefresh))
|
|
|
1266 |
{
|
|
|
1267 |
iRetcode = mng_display_progressive_refresh (pData, 1);
|
|
|
1268 |
if (iRetcode) /* on error bail out */
|
|
|
1269 |
return iRetcode;
|
|
|
1270 |
}
|
|
|
1271 |
#endif
|
|
|
1272 |
}
|
|
|
1273 |
|
|
|
1274 |
return mng_release_pushchunk (pData);
|
|
|
1275 |
}
|
|
|
1276 |
|
|
|
1277 |
/* ************************************************************************** */
|
|
|
1278 |
|
|
|
1279 |
mng_retcode mng_read_graphic (mng_datap pData)
|
|
|
1280 |
{
|
|
|
1281 |
mng_uint32 iBuflen; /* number of bytes requested */
|
|
|
1282 |
mng_uint32 iRead; /* number of bytes read */
|
|
|
1283 |
mng_retcode iRetcode; /* temporary error-code */
|
|
|
1284 |
|
|
|
1285 |
#ifdef MNG_SUPPORT_TRACE
|
|
|
1286 |
MNG_TRACE (pData, MNG_FN_READ_GRAPHIC, MNG_LC_START);
|
|
|
1287 |
#endif
|
|
|
1288 |
|
|
|
1289 |
if (!pData->pReadbuf) /* buffer allocated ? */
|
|
|
1290 |
{
|
|
|
1291 |
pData->iReadbufsize = 4200; /* allocate a default read buffer */
|
|
|
1292 |
MNG_ALLOC (pData, pData->pReadbuf, pData->iReadbufsize);
|
|
|
1293 |
}
|
|
|
1294 |
/* haven't processed the signature ? */
|
|
|
1295 |
if ((!pData->bHavesig) || (pData->iSuspendpoint == 1))
|
|
|
1296 |
{
|
|
|
1297 |
iBuflen = 2 * sizeof (mng_uint32); /* read signature */
|
|
|
1298 |
|
|
|
1299 |
iRetcode = read_databuffer (pData, pData->pReadbuf, &pData->pReadbufnext, iBuflen, &iRead);
|
|
|
1300 |
|
|
|
1301 |
if (iRetcode)
|
|
|
1302 |
return iRetcode;
|
|
|
1303 |
|
|
|
1304 |
if (pData->bSuspended) /* input suspension ? */
|
|
|
1305 |
pData->iSuspendpoint = 1;
|
|
|
1306 |
else
|
|
|
1307 |
{
|
|
|
1308 |
if (iRead != iBuflen) /* full signature received ? */
|
|
|
1309 |
MNG_ERROR (pData, MNG_UNEXPECTEDEOF);
|
|
|
1310 |
/* is it a valid signature ? */
|
|
|
1311 |
if (mng_get_uint32 (pData->pReadbuf) == PNG_SIG)
|
|
|
1312 |
pData->eSigtype = mng_it_png;
|
|
|
1313 |
else
|
|
|
1314 |
#ifdef MNG_INCLUDE_JNG
|
|
|
1315 |
if (mng_get_uint32 (pData->pReadbuf) == JNG_SIG)
|
|
|
1316 |
pData->eSigtype = mng_it_jng;
|
|
|
1317 |
else
|
|
|
1318 |
#endif
|
|
|
1319 |
if (mng_get_uint32 (pData->pReadbuf) == MNG_SIG)
|
|
|
1320 |
pData->eSigtype = mng_it_mng;
|
|
|
1321 |
else
|
|
|
1322 |
MNG_ERROR (pData, MNG_INVALIDSIG);
|
|
|
1323 |
/* all of it ? */
|
|
|
1324 |
if (mng_get_uint32 (pData->pReadbuf+4) != POST_SIG)
|
|
|
1325 |
MNG_ERROR (pData, MNG_INVALIDSIG);
|
|
|
1326 |
|
|
|
1327 |
pData->bHavesig = MNG_TRUE;
|
|
|
1328 |
}
|
|
|
1329 |
}
|
|
|
1330 |
|
|
|
1331 |
if (!pData->bSuspended) /* still going ? */
|
|
|
1332 |
{
|
|
|
1333 |
do
|
|
|
1334 |
{ /* reset timer during mng_read() ? */
|
|
|
1335 |
if ((pData->bReading) && (!pData->bDisplaying))
|
|
|
1336 |
pData->bTimerset = MNG_FALSE;
|
|
|
1337 |
|
|
|
1338 |
if (pData->pFirstpushchunk) /* chunks pushed ? */
|
|
|
1339 |
iRetcode = process_pushedchunk (pData); /* process the pushed chunk */
|
|
|
1340 |
else
|
|
|
1341 |
iRetcode = read_chunk (pData); /* read & process a chunk */
|
|
|
1342 |
|
|
|
1343 |
if (iRetcode) /* on error bail out */
|
|
|
1344 |
return iRetcode;
|
|
|
1345 |
}
|
|
|
1346 |
#ifdef MNG_SUPPORT_DISPLAY /* until EOF or a break-request */
|
|
|
1347 |
while (((!pData->bEOF) || (pData->pCurraniobj)) &&
|
|
|
1348 |
(!pData->bSuspended) && (!pData->bSectionwait) &&
|
|
|
1349 |
((!pData->bTimerset) || ((pData->bReading) && (!pData->bDisplaying))));
|
|
|
1350 |
#else
|
|
|
1351 |
while ((!pData->bEOF) && (!pData->bSuspended));
|
|
|
1352 |
#endif
|
|
|
1353 |
}
|
|
|
1354 |
|
|
|
1355 |
#ifdef MNG_SUPPORT_TRACE
|
|
|
1356 |
MNG_TRACE (pData, MNG_FN_READ_GRAPHIC, MNG_LC_END);
|
|
|
1357 |
#endif
|
|
|
1358 |
|
|
|
1359 |
return MNG_NOERROR;
|
|
|
1360 |
}
|
|
|
1361 |
|
|
|
1362 |
/* ************************************************************************** */
|
|
|
1363 |
|
|
|
1364 |
#endif /* MNG_INCLUDE_READ_PROCS */
|
|
|
1365 |
|
|
|
1366 |
/* ************************************************************************** */
|
|
|
1367 |
/* * end of file * */
|
|
|
1368 |
/* ************************************************************************** */
|
|
|
1369 |
|