Details | Last modification | View Log | RSS feed
Rev | Author | Line No. | Line |
---|---|---|---|
4680 | right-hear | 1 | |
2 | * |
||
3 | * libpng version 1.5.1 - February 3, 2011 |
||
4 | * Copyright (c) 1998-2011 Glenn Randers-Pehrson |
||
5 | * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) |
||
6 | * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) |
||
7 | * |
||
8 | * This code is released under the libpng license (See LICENSE, below) |
||
9 | * |
||
10 | * Authors and maintainers: |
||
11 | * libpng versions 0.71, May 1995, through 0.88, January 1996: Guy Schalnat |
||
12 | * libpng versions 0.89c, June 1996, through 0.96, May 1997: Andreas Dilger |
||
13 | * libpng versions 0.97, January 1998, through 1.5.1 - February 3, 2011: Glenn |
||
14 | * See also "Contributing Authors", below. |
||
15 | * |
||
16 | * Note about libpng version numbers: |
||
17 | * |
||
18 | * Due to various miscommunications, unforeseen code incompatibilities |
||
19 | * and occasional factors outside the authors' control, version numbering |
||
20 | * on the library has not always been consistent and straightforward. |
||
21 | * The following table summarizes matters since version 0.89c, which was |
||
22 | * the first widely used release: |
||
23 | * |
||
24 | * source png.h png.h shared-lib |
||
25 | * version string int version |
||
26 | * ------- ------ ----- ---------- |
||
27 | * 0.89c "1.0 beta 3" 0.89 89 1.0.89 |
||
28 | * 0.90 "1.0 beta 4" 0.90 90 0.90 [should have been 2.0.90] |
||
29 | * 0.95 "1.0 beta 5" 0.95 95 0.95 [should have been 2.0.95] |
||
30 | * 0.96 "1.0 beta 6" 0.96 96 0.96 [should have been 2.0.96] |
||
31 | * 0.97b "1.00.97 beta 7" 1.00.97 97 1.0.1 [should have been 2.0.97] |
||
32 | * 0.97c 0.97 97 2.0.97 |
||
33 | * 0.98 0.98 98 2.0.98 |
||
34 | * 0.99 0.99 98 2.0.99 |
||
35 | * 0.99a-m 0.99 99 2.0.99 |
||
36 | * 1.00 1.00 100 2.1.0 [100 should be 10000] |
||
37 | * 1.0.0 (from here on, the 100 2.1.0 [100 should be 10000] |
||
38 | * 1.0.1 png.h string is 10001 2.1.0 |
||
39 | * 1.0.1a-e identical to the 10002 from here on, the shared library |
||
40 | * 1.0.2 source version) 10002 is 2.V where V is the source code |
||
41 | * 1.0.2a-b 10003 version, except as noted. |
||
42 | * 1.0.3 10003 |
||
43 | * 1.0.3a-d 10004 |
||
44 | * 1.0.4 10004 |
||
45 | * 1.0.4a-f 10005 |
||
46 | * 1.0.5 (+ 2 patches) 10005 |
||
47 | * 1.0.5a-d 10006 |
||
48 | * 1.0.5e-r 10100 (not source compatible) |
||
49 | * 1.0.5s-v 10006 (not binary compatible) |
||
50 | * 1.0.6 (+ 3 patches) 10006 (still binary incompatible) |
||
51 | * 1.0.6d-f 10007 (still binary incompatible) |
||
52 | * 1.0.6g 10007 |
||
53 | * 1.0.6h 10007 10.6h (testing xy.z so-numbering) |
||
54 | * 1.0.6i 10007 10.6i |
||
55 | * 1.0.6j 10007 2.1.0.6j (incompatible with 1.0.0) |
||
56 | * 1.0.7beta11-14 DLLNUM 10007 2.1.0.7beta11-14 (binary compatible) |
||
57 | * 1.0.7beta15-18 1 10007 2.1.0.7beta15-18 (binary compatible) |
||
58 | * 1.0.7rc1-2 1 10007 2.1.0.7rc1-2 (binary compatible) |
||
59 | * 1.0.7 1 10007 (still compatible) |
||
60 | * 1.0.8beta1-4 1 10008 2.1.0.8beta1-4 |
||
61 | * 1.0.8rc1 1 10008 2.1.0.8rc1 |
||
62 | * 1.0.8 1 10008 2.1.0.8 |
||
63 | * 1.0.9beta1-6 1 10009 2.1.0.9beta1-6 |
||
64 | * 1.0.9rc1 1 10009 2.1.0.9rc1 |
||
65 | * 1.0.9beta7-10 1 10009 2.1.0.9beta7-10 |
||
66 | * 1.0.9rc2 1 10009 2.1.0.9rc2 |
||
67 | * 1.0.9 1 10009 2.1.0.9 |
||
68 | * 1.0.10beta1 1 10010 2.1.0.10beta1 |
||
69 | * 1.0.10rc1 1 10010 2.1.0.10rc1 |
||
70 | * 1.0.10 1 10010 2.1.0.10 |
||
71 | * 1.0.11beta1-3 1 10011 2.1.0.11beta1-3 |
||
72 | * 1.0.11rc1 1 10011 2.1.0.11rc1 |
||
73 | * 1.0.11 1 10011 2.1.0.11 |
||
74 | * 1.0.12beta1-2 2 10012 2.1.0.12beta1-2 |
||
75 | * 1.0.12rc1 2 10012 2.1.0.12rc1 |
||
76 | * 1.0.12 2 10012 2.1.0.12 |
||
77 | * 1.1.0a-f - 10100 2.1.1.0a-f (branch abandoned) |
||
78 | * 1.2.0beta1-2 2 10200 2.1.2.0beta1-2 |
||
79 | * 1.2.0beta3-5 3 10200 3.1.2.0beta3-5 |
||
80 | * 1.2.0rc1 3 10200 3.1.2.0rc1 |
||
81 | * 1.2.0 3 10200 3.1.2.0 |
||
82 | * 1.2.1beta1-4 3 10201 3.1.2.1beta1-4 |
||
83 | * 1.2.1rc1-2 3 10201 3.1.2.1rc1-2 |
||
84 | * 1.2.1 3 10201 3.1.2.1 |
||
85 | * 1.2.2beta1-6 12 10202 12.so.0.1.2.2beta1-6 |
||
86 | * 1.0.13beta1 10 10013 10.so.0.1.0.13beta1 |
||
87 | * 1.0.13rc1 10 10013 10.so.0.1.0.13rc1 |
||
88 | * 1.2.2rc1 12 10202 12.so.0.1.2.2rc1 |
||
89 | * 1.0.13 10 10013 10.so.0.1.0.13 |
||
90 | * 1.2.2 12 10202 12.so.0.1.2.2 |
||
91 | * 1.2.3rc1-6 12 10203 12.so.0.1.2.3rc1-6 |
||
92 | * 1.2.3 12 10203 12.so.0.1.2.3 |
||
93 | * 1.2.4beta1-3 13 10204 12.so.0.1.2.4beta1-3 |
||
94 | * 1.0.14rc1 13 10014 10.so.0.1.0.14rc1 |
||
95 | * 1.2.4rc1 13 10204 12.so.0.1.2.4rc1 |
||
96 | * 1.0.14 10 10014 10.so.0.1.0.14 |
||
97 | * 1.2.4 13 10204 12.so.0.1.2.4 |
||
98 | * 1.2.5beta1-2 13 10205 12.so.0.1.2.5beta1-2 |
||
99 | * 1.0.15rc1-3 10 10015 10.so.0.1.0.15rc1-3 |
||
100 | * 1.2.5rc1-3 13 10205 12.so.0.1.2.5rc1-3 |
||
101 | * 1.0.15 10 10015 10.so.0.1.0.15 |
||
102 | * 1.2.5 13 10205 12.so.0.1.2.5 |
||
103 | * 1.2.6beta1-4 13 10206 12.so.0.1.2.6beta1-4 |
||
104 | * 1.0.16 10 10016 10.so.0.1.0.16 |
||
105 | * 1.2.6 13 10206 12.so.0.1.2.6 |
||
106 | * 1.2.7beta1-2 13 10207 12.so.0.1.2.7beta1-2 |
||
107 | * 1.0.17rc1 10 10017 12.so.0.1.0.17rc1 |
||
108 | * 1.2.7rc1 13 10207 12.so.0.1.2.7rc1 |
||
109 | * 1.0.17 10 10017 12.so.0.1.0.17 |
||
110 | * 1.2.7 13 10207 12.so.0.1.2.7 |
||
111 | * 1.2.8beta1-5 13 10208 12.so.0.1.2.8beta1-5 |
||
112 | * 1.0.18rc1-5 10 10018 12.so.0.1.0.18rc1-5 |
||
113 | * 1.2.8rc1-5 13 10208 12.so.0.1.2.8rc1-5 |
||
114 | * 1.0.18 10 10018 12.so.0.1.0.18 |
||
115 | * 1.2.8 13 10208 12.so.0.1.2.8 |
||
116 | * 1.2.9beta1-3 13 10209 12.so.0.1.2.9beta1-3 |
||
117 | * 1.2.9beta4-11 13 10209 12.so.0.9[.0] |
||
118 | * 1.2.9rc1 13 10209 12.so.0.9[.0] |
||
119 | * 1.2.9 13 10209 12.so.0.9[.0] |
||
120 | * 1.2.10beta1-7 13 10210 12.so.0.10[.0] |
||
121 | * 1.2.10rc1-2 13 10210 12.so.0.10[.0] |
||
122 | * 1.2.10 13 10210 12.so.0.10[.0] |
||
123 | * 1.4.0beta1-5 14 10400 14.so.0.0[.0] |
||
124 | * 1.2.11beta1-4 13 10211 12.so.0.11[.0] |
||
125 | * 1.4.0beta7-8 14 10400 14.so.0.0[.0] |
||
126 | * 1.2.11 13 10211 12.so.0.11[.0] |
||
127 | * 1.2.12 13 10212 12.so.0.12[.0] |
||
128 | * 1.4.0beta9-14 14 10400 14.so.0.0[.0] |
||
129 | * 1.2.13 13 10213 12.so.0.13[.0] |
||
130 | * 1.4.0beta15-36 14 10400 14.so.0.0[.0] |
||
131 | * 1.4.0beta37-87 14 10400 14.so.14.0[.0] |
||
132 | * 1.4.0rc01 14 10400 14.so.14.0[.0] |
||
133 | * 1.4.0beta88-109 14 10400 14.so.14.0[.0] |
||
134 | * 1.4.0rc02-08 14 10400 14.so.14.0[.0] |
||
135 | * 1.4.0 14 10400 14.so.14.0[.0] |
||
136 | * 1.4.1beta01-03 14 10401 14.so.14.1[.0] |
||
137 | * 1.4.1rc01 14 10401 14.so.14.1[.0] |
||
138 | * 1.4.1beta04-12 14 10401 14.so.14.1[.0] |
||
139 | * 1.4.1 14 10401 14.so.14.1[.0] |
||
140 | * 1.4.2 14 10402 14.so.14.2[.0] |
||
141 | * 1.4.3 14 10403 14.so.14.3[.0] |
||
142 | * 1.4.4 14 10404 14.so.14.4[.0] |
||
143 | * 1.5.0beta01-58 15 10500 15.so.15.0[.0] |
||
144 | * 1.5.0rc01-07 15 10500 15.so.15.0[.0] |
||
145 | * 1.5.0 15 10500 15.so.15.0[.0] |
||
146 | * 1.5.1beta01-11 15 10501 15.so.15.1[.0] |
||
147 | * 1.5.1rc01-02 15 10501 15.so.15.1[.0] |
||
148 | * 1.5.1 15 10501 15.so.15.1[.0] |
||
149 | * |
||
150 | * Henceforth the source version will match the shared-library major |
||
151 | * and minor numbers; the shared-library major version number will be |
||
152 | * used for changes in backward compatibility, as it is intended. The |
||
153 | * PNG_LIBPNG_VER macro, which is not used within libpng but is available |
||
154 | * for applications, is an unsigned integer of the form xyyzz corresponding |
||
155 | * to the source version x.y.z (leading zeros in y and z). Beta versions |
||
156 | * were given the previous public release number plus a letter, until |
||
157 | * version 1.0.6j; from then on they were given the upcoming public |
||
158 | * release number plus "betaNN" or "rcN". |
||
159 | * |
||
160 | * Binary incompatibility exists only when applications make direct access |
||
161 | * to the info_ptr or png_ptr members through png.h, and the compiled |
||
162 | * application is loaded with a different version of the library. |
||
163 | * |
||
164 | * DLLNUM will change each time there are forward or backward changes |
||
165 | * in binary compatibility (e.g., when a new feature is added). |
||
166 | * |
||
167 | * See libpng-manual.txt or libpng.3 for more information. The PNG |
||
168 | * specification is available as a W3C Recommendation and as an ISO |
||
169 | * Specification, |
||
170 | */ |
||
171 | |||
172 | |||
173 | * COPYRIGHT NOTICE, DISCLAIMER, and LICENSE: |
||
174 | * |
||
175 | * If you modify libpng you may insert additional notices immediately following |
||
176 | * this sentence. |
||
177 | * |
||
178 | * This code is released under the libpng license. |
||
179 | * |
||
180 | * libpng versions 1.2.6, August 15, 2004, through 1.5.1, February 3, 2011, are |
||
181 | * Copyright (c) 2004, 2006-2011 Glenn Randers-Pehrson, and are |
||
182 | * distributed according to the same disclaimer and license as libpng-1.2.5 |
||
183 | * with the following individual added to the list of Contributing Authors: |
||
184 | * |
||
185 | * Cosmin Truta |
||
186 | * |
||
187 | * libpng versions 1.0.7, July 1, 2000, through 1.2.5, October 3, 2002, are |
||
188 | * Copyright (c) 2000-2002 Glenn Randers-Pehrson, and are |
||
189 | * distributed according to the same disclaimer and license as libpng-1.0.6 |
||
190 | * with the following individuals added to the list of Contributing Authors: |
||
191 | * |
||
192 | * Simon-Pierre Cadieux |
||
193 | * Eric S. Raymond |
||
194 | * Gilles Vollant |
||
195 | * |
||
196 | * and with the following additions to the disclaimer: |
||
197 | * |
||
198 | * There is no warranty against interference with your enjoyment of the |
||
199 | * library or against infringement. There is no warranty that our |
||
200 | * efforts or the library will fulfill any of your particular purposes |
||
201 | * or needs. This library is provided with all faults, and the entire |
||
202 | * risk of satisfactory quality, performance, accuracy, and effort is with |
||
203 | * the user. |
||
204 | * |
||
205 | * libpng versions 0.97, January 1998, through 1.0.6, March 20, 2000, are |
||
206 | * Copyright (c) 1998, 1999, 2000 Glenn Randers-Pehrson, and are |
||
207 | * distributed according to the same disclaimer and license as libpng-0.96, |
||
208 | * with the following individuals added to the list of Contributing Authors: |
||
209 | * |
||
210 | * Tom Lane |
||
211 | * Glenn Randers-Pehrson |
||
212 | * Willem van Schaik |
||
213 | * |
||
214 | * libpng versions 0.89, June 1996, through 0.96, May 1997, are |
||
215 | * Copyright (c) 1996, 1997 Andreas Dilger |
||
216 | * Distributed according to the same disclaimer and license as libpng-0.88, |
||
217 | * with the following individuals added to the list of Contributing Authors: |
||
218 | * |
||
219 | * John Bowler |
||
220 | * Kevin Bracey |
||
221 | * Sam Bushell |
||
222 | * Magnus Holmgren |
||
223 | * Greg Roelofs |
||
224 | * Tom Tanner |
||
225 | * |
||
226 | * libpng versions 0.5, May 1995, through 0.88, January 1996, are |
||
227 | * Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc. |
||
228 | * |
||
229 | * For the purposes of this copyright and license, "Contributing Authors" |
||
230 | * is defined as the following set of individuals: |
||
231 | * |
||
232 | * Andreas Dilger |
||
233 | * Dave Martindale |
||
234 | * Guy Eric Schalnat |
||
235 | * Paul Schmidt |
||
236 | * Tim Wegner |
||
237 | * |
||
238 | * The PNG Reference Library is supplied "AS IS". The Contributing Authors |
||
239 | * and Group 42, Inc. disclaim all warranties, expressed or implied, |
||
240 | * including, without limitation, the warranties of merchantability and of |
||
241 | * fitness for any purpose. The Contributing Authors and Group 42, Inc. |
||
242 | * assume no liability for direct, indirect, incidental, special, exemplary, |
||
243 | * or consequential damages, which may result from the use of the PNG |
||
244 | * Reference Library, even if advised of the possibility of such damage. |
||
245 | * |
||
246 | * Permission is hereby granted to use, copy, modify, and distribute this |
||
247 | * source code, or portions hereof, for any purpose, without fee, subject |
||
248 | * to the following restrictions: |
||
249 | * |
||
250 | * 1. The origin of this source code must not be misrepresented. |
||
251 | * |
||
252 | * 2. Altered versions must be plainly marked as such and must not |
||
253 | * be misrepresented as being the original source. |
||
254 | * |
||
255 | * 3. This Copyright notice may not be removed or altered from |
||
256 | * any source or altered source distribution. |
||
257 | * |
||
258 | * The Contributing Authors and Group 42, Inc. specifically permit, without |
||
259 | * fee, and encourage the use of this source code as a component to |
||
260 | * supporting the PNG file format in commercial products. If you use this |
||
261 | * source code in a product, acknowledgment is not required but would be |
||
262 | * appreciated. |
||
263 | */ |
||
264 | |||
265 | |||
266 | * A "png_get_copyright" function is available, for convenient use in "about" |
||
267 | * boxes and the like: |
||
268 | * |
||
269 | * printf("%s", png_get_copyright(NULL)); |
||
270 | * |
||
271 | * Also, the PNG logo (in PNG format, of course) is supplied in the |
||
272 | * files "pngbar.png" and "pngbar.jpg (88x31) and "pngnow.png" (98x31). |
||
273 | */ |
||
274 | |||
275 | |||
276 | * Libpng is OSI Certified Open Source Software. OSI Certified is a |
||
277 | * certification mark of the Open Source Initiative. |
||
278 | */ |
||
279 | |||
280 | |||
281 | * The contributing authors would like to thank all those who helped |
||
282 | * with testing, bug fixes, and patience. This wouldn't have been |
||
283 | * possible without all of you. |
||
284 | * |
||
285 | * Thanks to Frank J. T. Wojcik for helping with the documentation. |
||
286 | */ |
||
287 | |||
288 | |||
289 | * Y2K compliance in libpng: |
||
290 | * ========================= |
||
291 | * |
||
292 | * February 3, 2011 |
||
293 | * |
||
294 | * Since the PNG Development group is an ad-hoc body, we can't make |
||
295 | * an official declaration. |
||
296 | * |
||
297 | * This is your unofficial assurance that libpng from version 0.71 and |
||
298 | * upward through 1.5.1 are Y2K compliant. It is my belief that |
||
299 | * earlier versions were also Y2K compliant. |
||
300 | * |
||
301 | * Libpng only has three year fields. One is a 2-byte unsigned integer |
||
302 | * that will hold years up to 65535. The other two hold the date in text |
||
303 | * format, and will hold years up to 9999. |
||
304 | * |
||
305 | * The integer is |
||
306 | * "png_uint_16 year" in png_time_struct. |
||
307 | * |
||
308 | * The strings are |
||
309 | * "png_charp time_buffer" in png_struct and |
||
310 | * "near_time_buffer", which is a local character string in png.c. |
||
311 | * |
||
312 | * There are seven time-related functions: |
||
313 | * png.c: png_convert_to_rfc_1123() in png.c |
||
314 | * (formerly png_convert_to_rfc_1152() in error) |
||
315 | * png_convert_from_struct_tm() in pngwrite.c, called in pngwrite.c |
||
316 | * png_convert_from_time_t() in pngwrite.c |
||
317 | * png_get_tIME() in pngget.c |
||
318 | * png_handle_tIME() in pngrutil.c, called in pngread.c |
||
319 | * png_set_tIME() in pngset.c |
||
320 | * png_write_tIME() in pngwutil.c, called in pngwrite.c |
||
321 | * |
||
322 | * All handle dates properly in a Y2K environment. The |
||
323 | * png_convert_from_time_t() function calls gmtime() to convert from system |
||
324 | * clock time, which returns (year - 1900), which we properly convert to |
||
325 | * the full 4-digit year. There is a possibility that applications using |
||
326 | * libpng are not passing 4-digit years into the png_convert_to_rfc_1123() |
||
327 | * function, or that they are incorrectly passing only a 2-digit year |
||
328 | * instead of "year - 1900" into the png_convert_from_struct_tm() function, |
||
329 | * but this is not under our control. The libpng documentation has always |
||
330 | * stated that it works with 4-digit years, and the APIs have been |
||
331 | * documented as such. |
||
332 | * |
||
333 | * The tIME chunk itself is also Y2K compliant. It uses a 2-byte unsigned |
||
334 | * integer to hold the year, and can hold years as large as 65535. |
||
335 | * |
||
336 | * zlib, upon which libpng depends, is also Y2K compliant. It contains |
||
337 | * no date-related code. |
||
338 | * |
||
339 | * Glenn Randers-Pehrson |
||
340 | * libpng maintainer |
||
341 | * PNG Development Group |
||
342 | */ |
||
343 | |||
344 | |||
345 | #define PNG_H |
||
346 | |||
347 | |||
348 | * describes how to use libpng, and the file example.c summarizes it |
||
349 | * with some code on which to build. This file is useful for looking |
||
350 | * at the actual function definitions and structure components. |
||
351 | */ |
||
352 | |||
353 | |||
354 | #define PNG_LIBPNG_VER_STRING "1.5.1" |
||
355 | #define PNG_HEADER_VERSION_STRING \ |
||
356 | " libpng version 1.5.1 - February 3, 2011\n" |
||
357 | |||
358 | |||
359 | #define PNG_LIBPNG_VER_DLLNUM 15 |
||
360 | |||
361 | |||
362 | #define PNG_LIBPNG_VER_MAJOR 1 |
||
363 | #define PNG_LIBPNG_VER_MINOR 5 |
||
364 | #define PNG_LIBPNG_VER_RELEASE 1 |
||
365 | /* This should match the numeric part of the final component of |
||
366 | * PNG_LIBPNG_VER_STRING, omitting any leading zero: |
||
367 | */ |
||
368 | |||
369 | |||
370 | |||
371 | |||
372 | #define PNG_LIBPNG_BUILD_ALPHA 1 |
||
373 | #define PNG_LIBPNG_BUILD_BETA 2 |
||
374 | #define PNG_LIBPNG_BUILD_RC 3 |
||
375 | #define PNG_LIBPNG_BUILD_STABLE 4 |
||
376 | #define PNG_LIBPNG_BUILD_RELEASE_STATUS_MASK 7 |
||
377 | |||
378 | |||
379 | #define PNG_LIBPNG_BUILD_PATCH 8 /* Can be OR'ed with |
||
380 | PNG_LIBPNG_BUILD_STABLE only */ |
||
381 | #define PNG_LIBPNG_BUILD_PRIVATE 16 /* Cannot be OR'ed with |
||
382 | PNG_LIBPNG_BUILD_SPECIAL */ |
||
383 | #define PNG_LIBPNG_BUILD_SPECIAL 32 /* Cannot be OR'ed with |
||
384 | PNG_LIBPNG_BUILD_PRIVATE */ |
||
385 | |||
386 | |||
387 | |||
388 | |||
389 | * We must not include leading zeros. |
||
390 | * Versions 0.7 through 1.0.0 were in the range 0 to 100 here (only |
||
391 | * version 1.0.0 was mis-numbered 100 instead of 10000). From |
||
392 | * version 1.0.1 it's xxyyzz, where x=major, y=minor, z=release |
||
393 | */ |
||
394 | #define PNG_LIBPNG_VER 10501 /* 1.5.1 */ |
||
395 | |||
396 | |||
397 | * the library has been built. |
||
398 | */ |
||
399 | #ifndef PNGLCONF_H |
||
400 | /* If pnglibconf.h is missing, you can |
||
401 | * copy scripts/pnglibconf.h.prebuilt to pnglibconf.h |
||
402 | */ |
||
403 | # include "pnglibconf.h" |
||
404 | #endif |
||
405 | |||
406 | |||
407 | /* Standard header files (not needed for the version info) */ |
||
408 | # ifdef PNG_SETJMP_SUPPORTED |
||
409 | # include |
||
410 | # endif |
||
411 | |||
412 | |||
413 | * defines struct tm: |
||
414 | */ |
||
415 | #ifdef PNG_CONVERT_tIME_SUPPORTED |
||
416 | /* "time.h" functions are not supported on all operating systems */ |
||
417 | # include |
||
418 | #endif |
||
419 | |||
420 | |||
421 | # include "pngconf.h" |
||
422 | #endif |
||
423 | |||
424 | |||
425 | * Added at libpng-1.2.8 |
||
426 | * |
||
427 | * Ref MSDN: Private as priority over Special |
||
428 | * VS_FF_PRIVATEBUILD File *was not* built using standard release |
||
429 | * procedures. If this value is given, the StringFileInfo block must |
||
430 | * contain a PrivateBuild string. |
||
431 | * |
||
432 | * VS_FF_SPECIALBUILD File *was* built by the original company using |
||
433 | * standard release procedures but is a variation of the standard |
||
434 | * file of the same version number. If this value is given, the |
||
435 | * StringFileInfo block must contain a SpecialBuild string. |
||
436 | */ |
||
437 | |||
438 | |||
439 | # define PNG_LIBPNG_BUILD_TYPE \ |
||
440 | (PNG_LIBPNG_BUILD_BASE_TYPE | PNG_LIBPNG_BUILD_PRIVATE) |
||
441 | #else |
||
442 | # ifdef PNG_LIBPNG_SPECIALBUILD |
||
443 | # define PNG_LIBPNG_BUILD_TYPE \ |
||
444 | (PNG_LIBPNG_BUILD_BASE_TYPE | PNG_LIBPNG_BUILD_SPECIAL) |
||
445 | # else |
||
446 | # define PNG_LIBPNG_BUILD_TYPE (PNG_LIBPNG_BUILD_BASE_TYPE) |
||
447 | # endif |
||
448 | #endif |
||
449 | |||
450 | |||
451 | |||
452 | |||
453 | #ifdef __cplusplus |
||
454 | extern "C" { |
||
455 | #endif /* __cplusplus */ |
||
456 | |||
457 | |||
458 | * the version above. |
||
459 | */ |
||
460 | #define png_libpng_ver png_get_header_ver(NULL) |
||
461 | |||
462 | |||
463 | * |
||
464 | * 1. Any configuration options that can be specified by for the application |
||
465 | * code when it is built. (Build time configuration is in pnglibconf.h) |
||
466 | * 2. Type definitions (base types are defined in pngconf.h), structure |
||
467 | * definitions. |
||
468 | * 3. Exported library functions. |
||
469 | * |
||
470 | * The library source code has additional files (principally pngpriv.h) that |
||
471 | * allow configuration of the library. |
||
472 | */ |
||
473 | /* Section 1: run time configuration |
||
474 | * See pnglibconf.h for build time configuration |
||
475 | * |
||
476 | * Run time configuration allows the application to choose between |
||
477 | * implementations of certain arithmetic APIs. The default is set |
||
478 | * at build time and recorded in pnglibconf.h, but it is safe to |
||
479 | * override these (and only these) settings. Note that this won't |
||
480 | * change what the library does, only application code, and the |
||
481 | * settings can (and probably should) be made on a per-file basis |
||
482 | * by setting the #defines before including png.h |
||
483 | * |
||
484 | * Use macros to read integers from PNG data or use the exported |
||
485 | * functions? |
||
486 | * PNG_USE_READ_MACROS: use the macros (see below) Note that |
||
487 | * the macros evaluate their argument multiple times. |
||
488 | * PNG_NO_USE_READ_MACROS: call the relevant library function. |
||
489 | * |
||
490 | * Use the alternative algorithm for compositing alpha samples that |
||
491 | * does not use division? |
||
492 | * PNG_READ_COMPOSITE_NODIV_SUPPORTED: use the 'no division' |
||
493 | * algorithm. |
||
494 | * PNG_NO_READ_COMPOSITE_NODIV: use the 'division' algorithm. |
||
495 | * |
||
496 | * How to handle benign errors if PNG_ALLOW_BENIGN_ERRORS is |
||
497 | * false? |
||
498 | * PNG_ALLOW_BENIGN_ERRORS: map calls to the benign error |
||
499 | * APIs to png_warning. |
||
500 | * Otherwise the calls are mapped to png_error. |
||
501 | */ |
||
502 | |||
503 | |||
504 | * constants. |
||
505 | * See pngconf.h for base types that vary by machine/system |
||
506 | */ |
||
507 | |||
508 | |||
509 | * do not agree upon the version number. |
||
510 | */ |
||
511 | typedef char* png_libpng_version_1_5_1; |
||
512 | |||
513 | |||
514 | * exact size) is not important, although the size of the fields need to |
||
515 | * be png_byte or png_uint_16 (as defined below). |
||
516 | */ |
||
517 | typedef struct png_color_struct |
||
518 | { |
||
519 | png_byte red; |
||
520 | png_byte green; |
||
521 | png_byte blue; |
||
522 | } png_color; |
||
523 | typedef png_color FAR * png_colorp; |
||
524 | typedef PNG_CONST png_color FAR * png_const_colorp; |
||
525 | typedef png_color FAR * FAR * png_colorpp; |
||
526 | |||
527 | |||
528 | { |
||
529 | png_byte index; /* used for palette files */ |
||
530 | png_uint_16 red; /* for use in red green blue files */ |
||
531 | png_uint_16 green; |
||
532 | png_uint_16 blue; |
||
533 | png_uint_16 gray; /* for use in grayscale files */ |
||
534 | } png_color_16; |
||
535 | typedef png_color_16 FAR * png_color_16p; |
||
536 | typedef PNG_CONST png_color_16 FAR * png_const_color_16p; |
||
537 | typedef png_color_16 FAR * FAR * png_color_16pp; |
||
538 | |||
539 | |||
540 | { |
||
541 | png_byte red; /* for use in red green blue files */ |
||
542 | png_byte green; |
||
543 | png_byte blue; |
||
544 | png_byte gray; /* for use in grayscale files */ |
||
545 | png_byte alpha; /* for alpha channel files */ |
||
546 | } png_color_8; |
||
547 | typedef png_color_8 FAR * png_color_8p; |
||
548 | typedef PNG_CONST png_color_8 FAR * png_const_color_8p; |
||
549 | typedef png_color_8 FAR * FAR * png_color_8pp; |
||
550 | |||
551 | |||
552 | * The following two structures are used for the in-core representation |
||
553 | * of sPLT chunks. |
||
554 | */ |
||
555 | typedef struct png_sPLT_entry_struct |
||
556 | { |
||
557 | png_uint_16 red; |
||
558 | png_uint_16 green; |
||
559 | png_uint_16 blue; |
||
560 | png_uint_16 alpha; |
||
561 | png_uint_16 frequency; |
||
562 | } png_sPLT_entry; |
||
563 | typedef png_sPLT_entry FAR * png_sPLT_entryp; |
||
564 | typedef PNG_CONST png_sPLT_entry FAR * png_const_sPLT_entryp; |
||
565 | typedef png_sPLT_entry FAR * FAR * png_sPLT_entrypp; |
||
566 | |||
567 | |||
568 | * occupy the LSB of their respective members, and the MSB of each member |
||
569 | * is zero-filled. The frequency member always occupies the full 16 bits. |
||
570 | */ |
||
571 | |||
572 | |||
573 | { |
||
574 | png_charp name; /* palette name */ |
||
575 | png_byte depth; /* depth of palette samples */ |
||
576 | png_sPLT_entryp entries; /* palette entries */ |
||
577 | png_int_32 nentries; /* number of palette entries */ |
||
578 | } png_sPLT_t; |
||
579 | typedef png_sPLT_t FAR * png_sPLT_tp; |
||
580 | typedef PNG_CONST png_sPLT_t FAR * png_const_sPLT_tp; |
||
581 | typedef png_sPLT_t FAR * FAR * png_sPLT_tpp; |
||
582 | |||
583 | |||
584 | /* png_text holds the contents of a text/ztxt/itxt chunk in a PNG file, |
||
585 | * and whether that contents is compressed or not. The "key" field |
||
586 | * points to a regular zero-terminated C string. The "text", "lang", and |
||
587 | * "lang_key" fields can be regular C strings, empty strings, or NULL pointers. |
||
588 | * However, the * structure returned by png_get_text() will always contain |
||
589 | * regular zero-terminated C strings (possibly empty), never NULL pointers, |
||
590 | * so they can be safely used in printf() and other string-handling functions. |
||
591 | */ |
||
592 | typedef struct png_text_struct |
||
593 | { |
||
594 | int compression; /* compression value: |
||
595 | -1: tEXt, none |
||
596 | 0: zTXt, deflate |
||
597 | 1: iTXt, none |
||
598 | 2: iTXt, deflate */ |
||
599 | png_charp key; /* keyword, 1-79 character description of "text" */ |
||
600 | png_charp text; /* comment, may be an empty string (ie "") |
||
601 | or a NULL pointer */ |
||
602 | png_size_t text_length; /* length of the text string */ |
||
603 | png_size_t itxt_length; /* length of the itxt string */ |
||
604 | png_charp lang; /* language code, 0-79 characters |
||
605 | or a NULL pointer */ |
||
606 | png_charp lang_key; /* keyword translated UTF-8 string, 0 or more |
||
607 | chars or a NULL pointer */ |
||
608 | } png_text; |
||
609 | typedef png_text FAR * png_textp; |
||
610 | typedef PNG_CONST png_text FAR * png_const_textp; |
||
611 | typedef png_text FAR * FAR * png_textpp; |
||
612 | #endif |
||
613 | |||
614 | |||
615 | * The values of the PNG_TEXT_COMPRESSION_ defines should NOT be changed. */ |
||
616 | #define PNG_TEXT_COMPRESSION_NONE_WR -3 |
||
617 | #define PNG_TEXT_COMPRESSION_zTXt_WR -2 |
||
618 | #define PNG_TEXT_COMPRESSION_NONE -1 |
||
619 | #define PNG_TEXT_COMPRESSION_zTXt 0 |
||
620 | #define PNG_ITXT_COMPRESSION_NONE 1 |
||
621 | #define PNG_ITXT_COMPRESSION_zTXt 2 |
||
622 | #define PNG_TEXT_COMPRESSION_LAST 3 /* Not a valid value */ |
||
623 | |||
624 | |||
625 | * Two conversions are provided, both from time_t and struct tm. There |
||
626 | * is no portable way to convert to either of these structures, as far |
||
627 | * as I know. If you know of a portable way, send it to me. As a side |
||
628 | * note - PNG has always been Year 2000 compliant! |
||
629 | */ |
||
630 | typedef struct png_time_struct |
||
631 | { |
||
632 | png_uint_16 year; /* full year, as in, 1995 */ |
||
633 | png_byte month; /* month of year, 1 - 12 */ |
||
634 | png_byte day; /* day of month, 1 - 31 */ |
||
635 | png_byte hour; /* hour of day, 0 - 23 */ |
||
636 | png_byte minute; /* minute of hour, 0 - 59 */ |
||
637 | png_byte second; /* second of minute, 0 - 60 (for leap seconds) */ |
||
638 | } png_time; |
||
639 | typedef png_time FAR * png_timep; |
||
640 | typedef PNG_CONST png_time FAR * png_const_timep; |
||
641 | typedef png_time FAR * FAR * png_timepp; |
||
642 | |||
643 | |||
644 | defined(PNG_HANDLE_AS_UNKNOWN_SUPPORTED) |
||
645 | /* png_unknown_chunk is a structure to hold queued chunks for which there is |
||
646 | * no specific support. The idea is that we can use this to queue |
||
647 | * up private chunks for output even though the library doesn't actually |
||
648 | * know about their semantics. |
||
649 | */ |
||
650 | typedef struct png_unknown_chunk_t |
||
651 | { |
||
652 | png_byte name[5]; |
||
653 | png_byte *data; |
||
654 | png_size_t size; |
||
655 | |||
656 | |||
657 | png_byte location; /* mode of operation at read time */ |
||
658 | } |
||
659 | png_unknown_chunk; |
||
660 | typedef png_unknown_chunk FAR * png_unknown_chunkp; |
||
661 | typedef PNG_CONST png_unknown_chunk FAR * png_const_unknown_chunkp; |
||
662 | typedef png_unknown_chunk FAR * FAR * png_unknown_chunkpp; |
||
663 | #endif |
||
664 | |||
665 | |||
666 | typedef png_info FAR * png_infop; |
||
667 | typedef PNG_CONST png_info FAR * png_const_infop; |
||
668 | typedef png_info FAR * FAR * png_infopp; |
||
669 | |||
670 | |||
671 | #define PNG_UINT_31_MAX ((png_uint_32)0x7fffffffL) |
||
672 | #define PNG_UINT_32_MAX ((png_uint_32)(-1)) |
||
673 | #define PNG_SIZE_MAX ((png_size_t)(-1)) |
||
674 | |||
675 | |||
676 | * PNG specification manner (x100000) |
||
677 | */ |
||
678 | #define PNG_FP_1 100000 |
||
679 | #define PNG_FP_HALF 50000 |
||
680 | |||
681 | |||
682 | /* color type masks */ |
||
683 | #define PNG_COLOR_MASK_PALETTE 1 |
||
684 | #define PNG_COLOR_MASK_COLOR 2 |
||
685 | #define PNG_COLOR_MASK_ALPHA 4 |
||
686 | |||
687 | |||
688 | #define PNG_COLOR_TYPE_GRAY 0 |
||
689 | #define PNG_COLOR_TYPE_PALETTE (PNG_COLOR_MASK_COLOR | PNG_COLOR_MASK_PALETTE) |
||
690 | #define PNG_COLOR_TYPE_RGB (PNG_COLOR_MASK_COLOR) |
||
691 | #define PNG_COLOR_TYPE_RGB_ALPHA (PNG_COLOR_MASK_COLOR | PNG_COLOR_MASK_ALPHA) |
||
692 | #define PNG_COLOR_TYPE_GRAY_ALPHA (PNG_COLOR_MASK_ALPHA) |
||
693 | /* aliases */ |
||
694 | #define PNG_COLOR_TYPE_RGBA PNG_COLOR_TYPE_RGB_ALPHA |
||
695 | #define PNG_COLOR_TYPE_GA PNG_COLOR_TYPE_GRAY_ALPHA |
||
696 | |||
697 | |||
698 | #define PNG_COMPRESSION_TYPE_BASE 0 /* Deflate method 8, 32K window */ |
||
699 | #define PNG_COMPRESSION_TYPE_DEFAULT PNG_COMPRESSION_TYPE_BASE |
||
700 | |||
701 | |||
702 | #define PNG_FILTER_TYPE_BASE 0 /* Single row per-byte filtering */ |
||
703 | #define PNG_INTRAPIXEL_DIFFERENCING 64 /* Used only in MNG datastreams */ |
||
704 | #define PNG_FILTER_TYPE_DEFAULT PNG_FILTER_TYPE_BASE |
||
705 | |||
706 | |||
707 | #define PNG_INTERLACE_NONE 0 /* Non-interlaced image */ |
||
708 | #define PNG_INTERLACE_ADAM7 1 /* Adam7 interlacing */ |
||
709 | #define PNG_INTERLACE_LAST 2 /* Not a valid value */ |
||
710 | |||
711 | |||
712 | #define PNG_OFFSET_PIXEL 0 /* Offset in pixels */ |
||
713 | #define PNG_OFFSET_MICROMETER 1 /* Offset in micrometers (1/10^6 meter) */ |
||
714 | #define PNG_OFFSET_LAST 2 /* Not a valid value */ |
||
715 | |||
716 | |||
717 | #define PNG_EQUATION_LINEAR 0 /* Linear transformation */ |
||
718 | #define PNG_EQUATION_BASE_E 1 /* Exponential base e transform */ |
||
719 | #define PNG_EQUATION_ARBITRARY 2 /* Arbitrary base exponential transform */ |
||
720 | #define PNG_EQUATION_HYPERBOLIC 3 /* Hyperbolic sine transformation */ |
||
721 | #define PNG_EQUATION_LAST 4 /* Not a valid value */ |
||
722 | |||
723 | |||
724 | #define PNG_SCALE_UNKNOWN 0 /* unknown unit (image scale) */ |
||
725 | #define PNG_SCALE_METER 1 /* meters per pixel */ |
||
726 | #define PNG_SCALE_RADIAN 2 /* radians per pixel */ |
||
727 | #define PNG_SCALE_LAST 3 /* Not a valid value */ |
||
728 | |||
729 | |||
730 | #define PNG_RESOLUTION_UNKNOWN 0 /* pixels/unknown unit (aspect ratio) */ |
||
731 | #define PNG_RESOLUTION_METER 1 /* pixels/meter */ |
||
732 | #define PNG_RESOLUTION_LAST 2 /* Not a valid value */ |
||
733 | |||
734 | |||
735 | #define PNG_sRGB_INTENT_PERCEPTUAL 0 |
||
736 | #define PNG_sRGB_INTENT_RELATIVE 1 |
||
737 | #define PNG_sRGB_INTENT_SATURATION 2 |
||
738 | #define PNG_sRGB_INTENT_ABSOLUTE 3 |
||
739 | #define PNG_sRGB_INTENT_LAST 4 /* Not a valid value */ |
||
740 | |||
741 | |||
742 | #define PNG_KEYWORD_MAX_LENGTH 79 |
||
743 | |||
744 | |||
745 | #define PNG_MAX_PALETTE_LENGTH 256 |
||
746 | |||
747 | |||
748 | * from the PNG header, or if the application has filled in the corresponding |
||
749 | * data in the info_struct to be written into the output file. The values |
||
750 | * of the PNG_INFO_ |
||
751 | */ |
||
752 | #define PNG_INFO_gAMA 0x0001 |
||
753 | #define PNG_INFO_sBIT 0x0002 |
||
754 | #define PNG_INFO_cHRM 0x0004 |
||
755 | #define PNG_INFO_PLTE 0x0008 |
||
756 | #define PNG_INFO_tRNS 0x0010 |
||
757 | #define PNG_INFO_bKGD 0x0020 |
||
758 | #define PNG_INFO_hIST 0x0040 |
||
759 | #define PNG_INFO_pHYs 0x0080 |
||
760 | #define PNG_INFO_oFFs 0x0100 |
||
761 | #define PNG_INFO_tIME 0x0200 |
||
762 | #define PNG_INFO_pCAL 0x0400 |
||
763 | #define PNG_INFO_sRGB 0x0800 /* GR-P, 0.96a */ |
||
764 | #define PNG_INFO_iCCP 0x1000 /* ESR, 1.0.6 */ |
||
765 | #define PNG_INFO_sPLT 0x2000 /* ESR, 1.0.6 */ |
||
766 | #define PNG_INFO_sCAL 0x4000 /* ESR, 1.0.6 */ |
||
767 | #define PNG_INFO_IDAT 0x8000L /* ESR, 1.0.6 */ |
||
768 | |||
769 | |||
770 | * change these values for the row. It also should enable using |
||
771 | * the routines for other purposes. |
||
772 | */ |
||
773 | typedef struct png_row_info_struct |
||
774 | { |
||
775 | png_uint_32 width; /* width of row */ |
||
776 | png_size_t rowbytes; /* number of bytes in row */ |
||
777 | png_byte color_type; /* color type of row */ |
||
778 | png_byte bit_depth; /* bit depth of row */ |
||
779 | png_byte channels; /* number of channels (1, 2, 3, or 4) */ |
||
780 | png_byte pixel_depth; /* bits per pixel (depth * channels) */ |
||
781 | } png_row_info; |
||
782 | |||
783 | |||
784 | typedef png_row_info FAR * FAR * png_row_infopp; |
||
785 | |||
786 | |||
787 | * that allow the user to override the default I/O functions with his or her |
||
788 | * own. The png_error_ptr type should match that of user-supplied warning |
||
789 | * and error functions, while the png_rw_ptr type should match that of the |
||
790 | * user read/write data functions. Note that the 'write' function must not |
||
791 | * modify the buffer it is passed. The 'read' function, on the other hand, is |
||
792 | * expected to return the read data in the buffer. |
||
793 | */ |
||
794 | typedef struct png_struct_def png_struct; |
||
795 | typedef PNG_CONST png_struct FAR * png_const_structp; |
||
796 | typedef png_struct FAR * png_structp; |
||
797 | |||
798 | |||
799 | typedef PNG_CALLBACK(void, *png_rw_ptr, (png_structp, png_bytep, png_size_t), ); |
||
800 | typedef PNG_CALLBACK(void, *png_flush_ptr, (png_structp), ); |
||
801 | typedef PNG_CALLBACK(void, *png_read_status_ptr, (png_structp, png_uint_32, |
||
802 | int), ); |
||
803 | typedef PNG_CALLBACK(void, *png_write_status_ptr, (png_structp, png_uint_32, |
||
804 | int), ); |
||
805 | |||
806 | |||
807 | typedef PNG_CALLBACK(void, *png_progressive_info_ptr, |
||
808 | (png_structp, png_infop), ); |
||
809 | typedef PNG_CALLBACK(void, *png_progressive_end_ptr, |
||
810 | (png_structp, png_infop), ); |
||
811 | typedef PNG_CALLBACK(void, *png_progressive_row_ptr, |
||
812 | (png_structp, png_bytep, png_uint_32, int), ); |
||
813 | #endif |
||
814 | |||
815 | |||
816 | defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED) |
||
817 | typedef PNG_CALLBACK(void, *png_user_transform_ptr, |
||
818 | (png_structp, png_row_infop, png_bytep), ); |
||
819 | #endif |
||
820 | |||
821 | |||
822 | typedef PNG_CALLBACK(int, *png_user_chunk_ptr, (png_structp, |
||
823 | png_unknown_chunkp), ); |
||
824 | #endif |
||
825 | #ifdef PNG_UNKNOWN_CHUNKS_SUPPORTED |
||
826 | typedef PNG_CALLBACK(void, *png_unknown_chunk_ptr, (png_structp), ); |
||
827 | #endif |
||
828 | |||
829 | |||
830 | /* This must match the function definition in |
||
831 | * application must include this before png.h to obtain the definition |
||
832 | * of jmp_buf. The function is required to be PNG_NORETURN. (Note that |
||
833 | * PNG_PTR_NORETURN is used here because current versions of the Microsoft |
||
834 | * C compiler do not support the PNG_NORETURN attribute on a pointer.) |
||
835 | * |
||
836 | * If you get a type warning from the compiler when linking against this line |
||
837 | * then your compiler has 'longjmp' that does not match the requirements of the |
||
838 | * compiler that built libpng. You will have to write a wrapper function for |
||
839 | * your compiler's longjmp and call png_set_longjmp_fn directly (not via the |
||
840 | * png_jmpbuf macro.) |
||
841 | * |
||
842 | * If you get a warning here while building the library you will need to make |
||
843 | * changes to ensure that pnglibconf.h records the calling convention used by |
||
844 | * your compiler. This may be very difficult - try using a different compiler |
||
845 | * to build the library! |
||
846 | */ |
||
847 | typedef PNG_FUNCTION(void, (PNGCAPI *png_longjmp_ptr), PNGARG((jmp_buf, int)), |
||
848 | PNG_PTR_NORETURN); |
||
849 | #endif |
||
850 | |||
851 | |||
852 | #define PNG_TRANSFORM_IDENTITY 0x0000 /* read and write */ |
||
853 | #define PNG_TRANSFORM_STRIP_16 0x0001 /* read only */ |
||
854 | #define PNG_TRANSFORM_STRIP_ALPHA 0x0002 /* read only */ |
||
855 | #define PNG_TRANSFORM_PACKING 0x0004 /* read and write */ |
||
856 | #define PNG_TRANSFORM_PACKSWAP 0x0008 /* read and write */ |
||
857 | #define PNG_TRANSFORM_EXPAND 0x0010 /* read only */ |
||
858 | #define PNG_TRANSFORM_INVERT_MONO 0x0020 /* read and write */ |
||
859 | #define PNG_TRANSFORM_SHIFT 0x0040 /* read and write */ |
||
860 | #define PNG_TRANSFORM_BGR 0x0080 /* read and write */ |
||
861 | #define PNG_TRANSFORM_SWAP_ALPHA 0x0100 /* read and write */ |
||
862 | #define PNG_TRANSFORM_SWAP_ENDIAN 0x0200 /* read and write */ |
||
863 | #define PNG_TRANSFORM_INVERT_ALPHA 0x0400 /* read and write */ |
||
864 | #define PNG_TRANSFORM_STRIP_FILLER 0x0800 /* write only */ |
||
865 | /* Added to libpng-1.2.34 */ |
||
866 | #define PNG_TRANSFORM_STRIP_FILLER_BEFORE PNG_TRANSFORM_STRIP_FILLER |
||
867 | #define PNG_TRANSFORM_STRIP_FILLER_AFTER 0x1000 /* write only */ |
||
868 | /* Added to libpng-1.4.0 */ |
||
869 | #define PNG_TRANSFORM_GRAY_TO_RGB 0x2000 /* read only */ |
||
870 | |||
871 | |||
872 | #define PNG_FLAG_MNG_EMPTY_PLTE 0x01 |
||
873 | #define PNG_FLAG_MNG_FILTER_64 0x04 |
||
874 | #define PNG_ALL_MNG_FEATURES 0x05 |
||
875 | |||
876 | |||
877 | * this allowed the zlib default functions to be used on Windows |
||
878 | * platforms. In 1.5 the zlib default malloc (which just calls malloc and |
||
879 | * ignores the first argument) should be completely compatible with the |
||
880 | * following. |
||
881 | */ |
||
882 | typedef PNG_CALLBACK(png_voidp, *png_malloc_ptr, (png_structp, |
||
883 | png_alloc_size_t), ); |
||
884 | typedef PNG_CALLBACK(void, *png_free_ptr, (png_structp, png_voidp), ); |
||
885 | |||
886 | |||
887 | |||
888 | |||
889 | * Here are the function definitions most commonly used. This is not |
||
890 | * the place to find out how to use libpng. See libpng-manual.txt for the |
||
891 | * full explanation, see example.c for the summary. This just provides |
||
892 | * a simple one line description of the use of each function. |
||
893 | * |
||
894 | * The PNG_EXPORT() and PNG_EXPORTA() macros used below are defined in |
||
895 | * pngconf.h and in the *.dfn files in the scripts directory. |
||
896 | * |
||
897 | * PNG_EXPORT(ordinal, type, name, (args)); |
||
898 | * |
||
899 | * ordinal: ordinal that is used while building |
||
900 | * *.def files. The ordinal value is only |
||
901 | * relevant when preprocessing png.h with |
||
902 | * the *.dfn files for building symbol table |
||
903 | * entries, and are removed by pngconf.h. |
||
904 | * type: return type of the function |
||
905 | * name: function name |
||
906 | * args: function arguments, with types |
||
907 | * |
||
908 | * When we wish to append attributes to a function prototype we use |
||
909 | * the PNG_EXPORTA() macro instead. |
||
910 | * |
||
911 | * PNG_EXPORTA(ordinal, type, name, (args), attributes); |
||
912 | * |
||
913 | * ordinal, type, name, and args: same as in PNG_EXPORT(). |
||
914 | * attributes: function attributes |
||
915 | */ |
||
916 | |||
917 | |||
918 | PNG_EXPORT(1, png_uint_32, png_access_version_number, (void)); |
||
919 | |||
920 | |||
921 | * Handling more than 8 bytes from the beginning of the file is an error. |
||
922 | */ |
||
923 | PNG_EXPORT(2, void, png_set_sig_bytes, (png_structp png_ptr, int num_bytes)); |
||
924 | |||
925 | |||
926 | * PNG file. Returns zero if the supplied bytes match the 8-byte PNG |
||
927 | * signature, and non-zero otherwise. Having num_to_check == 0 or |
||
928 | * start > 7 will always fail (ie return non-zero). |
||
929 | */ |
||
930 | PNG_EXPORT(3, int, png_sig_cmp, (png_const_bytep sig, png_size_t start, |
||
931 | png_size_t num_to_check)); |
||
932 | |||
933 | |||
934 | * png_check_sig(sig, n) := !png_sig_cmp(sig, 0, n). |
||
935 | */ |
||
936 | #define png_check_sig(sig, n) !png_sig_cmp((sig), 0, (n)) |
||
937 | |||
938 | |||
939 | PNG_EXPORTA(4, png_structp, png_create_read_struct, |
||
940 | (png_const_charp user_png_ver, png_voidp error_ptr, |
||
941 | png_error_ptr error_fn, png_error_ptr warn_fn), |
||
942 | PNG_ALLOCATED); |
||
943 | |||
944 | |||
945 | PNG_EXPORTA(5, png_structp, png_create_write_struct, |
||
946 | (png_const_charp user_png_ver, png_voidp error_ptr, png_error_ptr error_fn, |
||
947 | png_error_ptr warn_fn), |
||
948 | PNG_ALLOCATED); |
||
949 | |||
950 | |||
951 | (png_const_structp png_ptr)); |
||
952 | |||
953 | |||
954 | png_size_t size)); |
||
955 | |||
956 | |||
957 | * match up. |
||
958 | */ |
||
959 | #ifdef PNG_SETJMP_SUPPORTED |
||
960 | /* This function returns the jmp_buf built in to *png_ptr. It must be |
||
961 | * supplied with an appropriate 'longjmp' function to use on that jmp_buf |
||
962 | * unless the default error function is overridden in which case NULL is |
||
963 | * acceptable. The size of the jmp_buf is checked against the actual size |
||
964 | * allocated by the library - the call will return NULL on a mismatch |
||
965 | * indicating an ABI mismatch. |
||
966 | */ |
||
967 | PNG_EXPORT(8, jmp_buf*, png_set_longjmp_fn, (png_structp png_ptr, |
||
968 | png_longjmp_ptr longjmp_fn, size_t jmp_buf_size)); |
||
969 | # define png_jmpbuf(png_ptr) \ |
||
970 | (*png_set_longjmp_fn((png_ptr), longjmp, sizeof (jmp_buf))) |
||
971 | #else |
||
972 | # define png_jmpbuf(png_ptr) \ |
||
973 | (LIBPNG_WAS_COMPILED_WITH__PNG_NO_SETJMP) |
||
974 | #endif |
||
975 | /* This function should be used by libpng applications in place of |
||
976 | * longjmp(png_ptr->jmpbuf, val). If longjmp_fn() has been set, it |
||
977 | * will use it; otherwise it will call PNG_ABORT(). This function was |
||
978 | * added in libpng-1.5.0. |
||
979 | */ |
||
980 | PNG_EXPORTA(9, void, png_longjmp, (png_structp png_ptr, int val), |
||
981 | PNG_NORETURN); |
||
982 | |||
983 | |||
984 | /* Reset the compression stream */ |
||
985 | PNG_EXPORT(10, int, png_reset_zstream, (png_structp png_ptr)); |
||
986 | #endif |
||
987 | |||
988 | |||
989 | #ifdef PNG_USER_MEM_SUPPORTED |
||
990 | PNG_EXPORTA(11, png_structp, png_create_read_struct_2, |
||
991 | (png_const_charp user_png_ver, png_voidp error_ptr, png_error_ptr error_fn, |
||
992 | png_error_ptr warn_fn, |
||
993 | png_voidp mem_ptr, png_malloc_ptr malloc_fn, png_free_ptr free_fn), |
||
994 | PNG_ALLOCATED); |
||
995 | PNG_EXPORTA(12, png_structp, png_create_write_struct_2, |
||
996 | (png_const_charp user_png_ver, png_voidp error_ptr, png_error_ptr error_fn, |
||
997 | png_error_ptr warn_fn, |
||
998 | png_voidp mem_ptr, png_malloc_ptr malloc_fn, png_free_ptr free_fn), |
||
999 | PNG_ALLOCATED); |
||
1000 | #endif |
||
1001 | |||
1002 | |||
1003 | PNG_EXPORT(13, void, png_write_sig, (png_structp png_ptr)); |
||
1004 | |||
1005 | |||
1006 | PNG_EXPORT(14, void, png_write_chunk, (png_structp png_ptr, png_const_bytep |
||
1007 | chunk_name, png_const_bytep data, png_size_t length)); |
||
1008 | |||
1009 | |||
1010 | PNG_EXPORT(15, void, png_write_chunk_start, (png_structp png_ptr, |
||
1011 | png_const_bytep chunk_name, png_uint_32 length)); |
||
1012 | |||
1013 | |||
1014 | PNG_EXPORT(16, void, png_write_chunk_data, (png_structp png_ptr, |
||
1015 | png_const_bytep data, png_size_t length)); |
||
1016 | |||
1017 | |||
1018 | PNG_EXPORT(17, void, png_write_chunk_end, (png_structp png_ptr)); |
||
1019 | |||
1020 | |||
1021 | PNG_EXPORTA(18, png_infop, png_create_info_struct, (png_structp png_ptr), |
||
1022 | PNG_ALLOCATED); |
||
1023 | |||
1024 | |||
1025 | png_size_t png_info_struct_size)); |
||
1026 | |||
1027 | |||
1028 | PNG_EXPORT(20, void, png_write_info_before_PLTE, |
||
1029 | (png_structp png_ptr, png_infop info_ptr)); |
||
1030 | PNG_EXPORT(21, void, png_write_info, |
||
1031 | (png_structp png_ptr, png_infop info_ptr)); |
||
1032 | |||
1033 | |||
1034 | /* Read the information before the actual image data. */ |
||
1035 | PNG_EXPORT(22, void, png_read_info, |
||
1036 | (png_structp png_ptr, png_infop info_ptr)); |
||
1037 | #endif |
||
1038 | |||
1039 | |||
1040 | PNG_EXPORT(23, png_const_charp, png_convert_to_rfc1123, |
||
1041 | (png_structp png_ptr, |
||
1042 | png_const_timep ptime)); |
||
1043 | #endif |
||
1044 | |||
1045 | |||
1046 | /* Convert from a struct tm to png_time */ |
||
1047 | PNG_EXPORT(24, void, png_convert_from_struct_tm, (png_timep ptime, |
||
1048 | PNG_CONST struct tm FAR * ttime)); |
||
1049 | |||
1050 | |||
1051 | PNG_EXPORT(25, void, png_convert_from_time_t, |
||
1052 | (png_timep ptime, time_t ttime)); |
||
1053 | #endif /* PNG_CONVERT_tIME_SUPPORTED */ |
||
1054 | |||
1055 | |||
1056 | /* Expand data to 24-bit RGB, or 8-bit grayscale, with alpha if available. */ |
||
1057 | PNG_EXPORT(26, void, png_set_expand, (png_structp png_ptr)); |
||
1058 | PNG_EXPORT(27, void, png_set_expand_gray_1_2_4_to_8, (png_structp png_ptr)); |
||
1059 | PNG_EXPORT(28, void, png_set_palette_to_rgb, (png_structp png_ptr)); |
||
1060 | PNG_EXPORT(29, void, png_set_tRNS_to_alpha, (png_structp png_ptr)); |
||
1061 | #endif |
||
1062 | |||
1063 | |||
1064 | /* Use blue, green, red order for pixels. */ |
||
1065 | PNG_EXPORT(30, void, png_set_bgr, (png_structp png_ptr)); |
||
1066 | #endif |
||
1067 | |||
1068 | |||
1069 | /* Expand the grayscale to 24-bit RGB if necessary. */ |
||
1070 | PNG_EXPORT(31, void, png_set_gray_to_rgb, (png_structp png_ptr)); |
||
1071 | #endif |
||
1072 | |||
1073 | |||
1074 | /* Reduce RGB to grayscale. */ |
||
1075 | PNG_FP_EXPORT(32, void, png_set_rgb_to_gray, (png_structp png_ptr, |
||
1076 | int error_action, double red, double green)); |
||
1077 | PNG_FIXED_EXPORT(33, void, png_set_rgb_to_gray_fixed, (png_structp png_ptr, |
||
1078 | int error_action, png_fixed_point red, png_fixed_point green)); |
||
1079 | |||
1080 | |||
1081 | png_ptr)); |
||
1082 | #endif |
||
1083 | |||
1084 | |||
1085 | png_colorp palette)); |
||
1086 | |||
1087 | |||
1088 | PNG_EXPORT(36, void, png_set_strip_alpha, (png_structp png_ptr)); |
||
1089 | #endif |
||
1090 | |||
1091 | |||
1092 | defined(PNG_WRITE_SWAP_ALPHA_SUPPORTED) |
||
1093 | PNG_EXPORT(37, void, png_set_swap_alpha, (png_structp png_ptr)); |
||
1094 | #endif |
||
1095 | |||
1096 | |||
1097 | defined(PNG_WRITE_INVERT_ALPHA_SUPPORTED) |
||
1098 | PNG_EXPORT(38, void, png_set_invert_alpha, (png_structp png_ptr)); |
||
1099 | #endif |
||
1100 | |||
1101 | |||
1102 | /* Add a filler byte to 8-bit Gray or 24-bit RGB images. */ |
||
1103 | PNG_EXPORT(39, void, png_set_filler, (png_structp png_ptr, png_uint_32 filler, |
||
1104 | int flags)); |
||
1105 | /* The values of the PNG_FILLER_ defines should NOT be changed */ |
||
1106 | # define PNG_FILLER_BEFORE 0 |
||
1107 | # define PNG_FILLER_AFTER 1 |
||
1108 | /* Add an alpha byte to 8-bit Gray or 24-bit RGB images. */ |
||
1109 | PNG_EXPORT(40, void, png_set_add_alpha, |
||
1110 | (png_structp png_ptr, png_uint_32 filler, |
||
1111 | int flags)); |
||
1112 | #endif /* PNG_READ_FILLER_SUPPORTED || PNG_WRITE_FILLER_SUPPORTED */ |
||
1113 | |||
1114 | |||
1115 | /* Swap bytes in 16-bit depth files. */ |
||
1116 | PNG_EXPORT(41, void, png_set_swap, (png_structp png_ptr)); |
||
1117 | #endif |
||
1118 | |||
1119 | |||
1120 | /* Use 1 byte per pixel in 1, 2, or 4-bit depth files. */ |
||
1121 | PNG_EXPORT(42, void, png_set_packing, (png_structp png_ptr)); |
||
1122 | #endif |
||
1123 | |||
1124 | |||
1125 | defined(PNG_WRITE_PACKSWAP_SUPPORTED) |
||
1126 | /* Swap packing order of pixels in bytes. */ |
||
1127 | PNG_EXPORT(43, void, png_set_packswap, (png_structp png_ptr)); |
||
1128 | #endif |
||
1129 | |||
1130 | |||
1131 | /* Converts files to legal bit depths. */ |
||
1132 | PNG_EXPORT(44, void, png_set_shift, (png_structp png_ptr, png_const_color_8p |
||
1133 | true_bits)); |
||
1134 | #endif |
||
1135 | |||
1136 | |||
1137 | defined(PNG_WRITE_INTERLACING_SUPPORTED) |
||
1138 | /* Have the code handle the interlacing. Returns the number of passes. |
||
1139 | * MUST be called before png_read_update_info or png_start_read_image, |
||
1140 | * otherwise it will not have the desired effect. Note that it is still |
||
1141 | * necessary to call png_read_row or png_read_rows png_get_image_height |
||
1142 | * times for each pass. |
||
1143 | */ |
||
1144 | PNG_EXPORT(45, int, png_set_interlace_handling, (png_structp png_ptr)); |
||
1145 | #endif |
||
1146 | |||
1147 | |||
1148 | /* Invert monochrome files */ |
||
1149 | PNG_EXPORT(46, void, png_set_invert_mono, (png_structp png_ptr)); |
||
1150 | #endif |
||
1151 | |||
1152 | |||
1153 | /* Handle alpha and tRNS by replacing with a background color. */ |
||
1154 | PNG_FP_EXPORT(47, void, png_set_background, (png_structp png_ptr, |
||
1155 | png_const_color_16p background_color, int background_gamma_code, |
||
1156 | int need_expand, double background_gamma)); |
||
1157 | PNG_FIXED_EXPORT(215, void, png_set_background_fixed, (png_structp png_ptr, |
||
1158 | png_const_color_16p background_color, int background_gamma_code, |
||
1159 | int need_expand, png_fixed_point background_gamma)); |
||
1160 | #endif |
||
1161 | #ifdef PNG_READ_BACKGROUND_SUPPORTED |
||
1162 | # define PNG_BACKGROUND_GAMMA_UNKNOWN 0 |
||
1163 | # define PNG_BACKGROUND_GAMMA_SCREEN 1 |
||
1164 | # define PNG_BACKGROUND_GAMMA_FILE 2 |
||
1165 | # define PNG_BACKGROUND_GAMMA_UNIQUE 3 |
||
1166 | #endif |
||
1167 | |||
1168 | |||
1169 | /* Strip the second byte of information from a 16-bit depth file. */ |
||
1170 | PNG_EXPORT(48, void, png_set_strip_16, (png_structp png_ptr)); |
||
1171 | #endif |
||
1172 | |||
1173 | |||
1174 | /* Turn on quantizing, and reduce the palette to the number of colors |
||
1175 | * available. |
||
1176 | */ |
||
1177 | PNG_EXPORT(49, void, png_set_quantize, |
||
1178 | (png_structp png_ptr, png_colorp palette, |
||
1179 | int num_palette, int maximum_colors, png_const_uint_16p histogram, |
||
1180 | int full_quantize)); |
||
1181 | #endif |
||
1182 | |||
1183 | |||
1184 | /* The threshold on gamma processing is configurable but hard-wired into the |
||
1185 | * library. The following is the floating point variant. |
||
1186 | */ |
||
1187 | #define PNG_GAMMA_THRESHOLD (PNG_GAMMA_THRESHOLD_FIXED*.00001) |
||
1188 | |||
1189 | |||
1190 | PNG_FP_EXPORT(50, void, png_set_gamma, |
||
1191 | (png_structp png_ptr, double screen_gamma, |
||
1192 | double default_file_gamma)); |
||
1193 | PNG_FIXED_EXPORT(208, void, png_set_gamma_fixed, (png_structp png_ptr, |
||
1194 | png_fixed_point screen_gamma, png_fixed_point default_file_gamma)); |
||
1195 | #endif |
||
1196 | |||
1197 | |||
1198 | /* Set how many lines between output flushes - 0 for no flushing */ |
||
1199 | PNG_EXPORT(51, void, png_set_flush, (png_structp png_ptr, int nrows)); |
||
1200 | /* Flush the current PNG output buffer */ |
||
1201 | PNG_EXPORT(52, void, png_write_flush, (png_structp png_ptr)); |
||
1202 | #endif |
||
1203 | |||
1204 | |||
1205 | PNG_EXPORT(53, void, png_start_read_image, (png_structp png_ptr)); |
||
1206 | |||
1207 | |||
1208 | PNG_EXPORT(54, void, png_read_update_info, |
||
1209 | (png_structp png_ptr, png_infop info_ptr)); |
||
1210 | |||
1211 | |||
1212 | /* Read one or more rows of image data. */ |
||
1213 | PNG_EXPORT(55, void, png_read_rows, (png_structp png_ptr, png_bytepp row, |
||
1214 | png_bytepp display_row, png_uint_32 num_rows)); |
||
1215 | #endif |
||
1216 | |||
1217 | |||
1218 | /* Read a row of data. */ |
||
1219 | PNG_EXPORT(56, void, png_read_row, (png_structp png_ptr, png_bytep row, |
||
1220 | png_bytep display_row)); |
||
1221 | #endif |
||
1222 | |||
1223 | |||
1224 | /* Read the whole image into memory at once. */ |
||
1225 | PNG_EXPORT(57, void, png_read_image, (png_structp png_ptr, png_bytepp image)); |
||
1226 | #endif |
||
1227 | |||
1228 | |||
1229 | PNG_EXPORT(58, void, png_write_row, |
||
1230 | (png_structp png_ptr, png_const_bytep row)); |
||
1231 | |||
1232 | |||
1233 | * is declared as writeable to maintain compatibility with previous versions |
||
1234 | * of libpng and to allow the 'display_row' array from read_rows to be passed |
||
1235 | * unchanged to write_rows. |
||
1236 | */ |
||
1237 | PNG_EXPORT(59, void, png_write_rows, (png_structp png_ptr, png_bytepp row, |
||
1238 | png_uint_32 num_rows)); |
||
1239 | |||
1240 | |||
1241 | PNG_EXPORT(60, void, png_write_image, |
||
1242 | (png_structp png_ptr, png_bytepp image)); |
||
1243 | |||
1244 | |||
1245 | PNG_EXPORT(61, void, png_write_end, |
||
1246 | (png_structp png_ptr, png_infop info_ptr)); |
||
1247 | |||
1248 | |||
1249 | /* Read the end of the PNG file. */ |
||
1250 | PNG_EXPORT(62, void, png_read_end, (png_structp png_ptr, png_infop info_ptr)); |
||
1251 | #endif |
||
1252 | |||
1253 | |||
1254 | PNG_EXPORT(63, void, png_destroy_info_struct, (png_structp png_ptr, |
||
1255 | png_infopp info_ptr_ptr)); |
||
1256 | |||
1257 | |||
1258 | PNG_EXPORT(64, void, png_destroy_read_struct, (png_structpp png_ptr_ptr, |
||
1259 | png_infopp info_ptr_ptr, png_infopp end_info_ptr_ptr)); |
||
1260 | |||
1261 | |||
1262 | PNG_EXPORT(65, void, png_destroy_write_struct, (png_structpp png_ptr_ptr, |
||
1263 | png_infopp info_ptr_ptr)); |
||
1264 | |||
1265 | |||
1266 | PNG_EXPORT(66, void, png_set_crc_action, |
||
1267 | (png_structp png_ptr, int crit_action, int ancil_action)); |
||
1268 | |||
1269 | |||
1270 | * ancillary and critical chunks, and whether to use the data contained |
||
1271 | * therein. Note that it is impossible to "discard" data in a critical |
||
1272 | * chunk. For versions prior to 0.90, the action was always error/quit, |
||
1273 | * whereas in version 0.90 and later, the action for CRC errors in ancillary |
||
1274 | * chunks is warn/discard. These values should NOT be changed. |
||
1275 | * |
||
1276 | * value action:critical action:ancillary |
||
1277 | */ |
||
1278 | #define PNG_CRC_DEFAULT 0 /* error/quit warn/discard data */ |
||
1279 | #define PNG_CRC_ERROR_QUIT 1 /* error/quit error/quit */ |
||
1280 | #define PNG_CRC_WARN_DISCARD 2 /* (INVALID) warn/discard data */ |
||
1281 | #define PNG_CRC_WARN_USE 3 /* warn/use data warn/use data */ |
||
1282 | #define PNG_CRC_QUIET_USE 4 /* quiet/use data quiet/use data */ |
||
1283 | #define PNG_CRC_NO_CHANGE 5 /* use current value use current value */ |
||
1284 | |||
1285 | |||
1286 | * libpng and the compression methods used by zlib. These functions are |
||
1287 | * mainly useful for testing, as the defaults should work with most users. |
||
1288 | * Those users who are tight on memory or want faster performance at the |
||
1289 | * expense of compression can modify them. See the compression library |
||
1290 | * header file (zlib.h) for an explination of the compression functions. |
||
1291 | */ |
||
1292 | |||
1293 | |||
1294 | * value for "method" is 0. |
||
1295 | */ |
||
1296 | PNG_EXPORT(67, void, png_set_filter, |
||
1297 | (png_structp png_ptr, int method, int filters)); |
||
1298 | |||
1299 | |||
1300 | * are chosen so that they don't conflict with real filter types |
||
1301 | * below, in case they are supplied instead of the #defined constants. |
||
1302 | * These values should NOT be changed. |
||
1303 | */ |
||
1304 | #define PNG_NO_FILTERS 0x00 |
||
1305 | #define PNG_FILTER_NONE 0x08 |
||
1306 | #define PNG_FILTER_SUB 0x10 |
||
1307 | #define PNG_FILTER_UP 0x20 |
||
1308 | #define PNG_FILTER_AVG 0x40 |
||
1309 | #define PNG_FILTER_PAETH 0x80 |
||
1310 | #define PNG_ALL_FILTERS (PNG_FILTER_NONE | PNG_FILTER_SUB | PNG_FILTER_UP | \ |
||
1311 | PNG_FILTER_AVG | PNG_FILTER_PAETH) |
||
1312 | |||
1313 | |||
1314 | * These defines should NOT be changed. |
||
1315 | */ |
||
1316 | #define PNG_FILTER_VALUE_NONE 0 |
||
1317 | #define PNG_FILTER_VALUE_SUB 1 |
||
1318 | #define PNG_FILTER_VALUE_UP 2 |
||
1319 | #define PNG_FILTER_VALUE_AVG 3 |
||
1320 | #define PNG_FILTER_VALUE_PAETH 4 |
||
1321 | #define PNG_FILTER_VALUE_LAST 5 |
||
1322 | |||
1323 | |||
1324 | /* The "heuristic_method" is given by one of the PNG_FILTER_HEURISTIC_ |
||
1325 | * defines, either the default (minimum-sum-of-absolute-differences), or |
||
1326 | * the experimental method (weighted-minimum-sum-of-absolute-differences). |
||
1327 | * |
||
1328 | * Weights are factors >= 1.0, indicating how important it is to keep the |
||
1329 | * filter type consistent between rows. Larger numbers mean the current |
||
1330 | * filter is that many times as likely to be the same as the "num_weights" |
||
1331 | * previous filters. This is cumulative for each previous row with a weight. |
||
1332 | * There needs to be "num_weights" values in "filter_weights", or it can be |
||
1333 | * NULL if the weights aren't being specified. Weights have no influence on |
||
1334 | * the selection of the first row filter. Well chosen weights can (in theory) |
||
1335 | * improve the compression for a given image. |
||
1336 | * |
||
1337 | * Costs are factors >= 1.0 indicating the relative decoding costs of a |
||
1338 | * filter type. Higher costs indicate more decoding expense, and are |
||
1339 | * therefore less likely to be selected over a filter with lower computational |
||
1340 | * costs. There needs to be a value in "filter_costs" for each valid filter |
||
1341 | * type (given by PNG_FILTER_VALUE_LAST), or it can be NULL if you aren't |
||
1342 | * setting the costs. Costs try to improve the speed of decompression without |
||
1343 | * unduly increasing the compressed image size. |
||
1344 | * |
||
1345 | * A negative weight or cost indicates the default value is to be used, and |
||
1346 | * values in the range [0.0, 1.0) indicate the value is to remain unchanged. |
||
1347 | * The default values for both weights and costs are currently 1.0, but may |
||
1348 | * change if good general weighting/cost heuristics can be found. If both |
||
1349 | * the weights and costs are set to 1.0, this degenerates the WEIGHTED method |
||
1350 | * to the UNWEIGHTED method, but with added encoding time/computation. |
||
1351 | */ |
||
1352 | PNG_FP_EXPORT(68, void, png_set_filter_heuristics, (png_structp png_ptr, |
||
1353 | int heuristic_method, int num_weights, png_const_doublep filter_weights, |
||
1354 | png_const_doublep filter_costs)); |
||
1355 | PNG_FIXED_EXPORT(209, void, png_set_filter_heuristics_fixed, |
||
1356 | (png_structp png_ptr, |
||
1357 | int heuristic_method, int num_weights, png_const_fixed_point_p |
||
1358 | filter_weights, png_const_fixed_point_p filter_costs)); |
||
1359 | #endif /* PNG_WRITE_WEIGHTED_FILTER_SUPPORTED */ |
||
1360 | |||
1361 | |||
1362 | * changed. |
||
1363 | */ |
||
1364 | #define PNG_FILTER_HEURISTIC_DEFAULT 0 /* Currently "UNWEIGHTED" */ |
||
1365 | #define PNG_FILTER_HEURISTIC_UNWEIGHTED 1 /* Used by libpng < 0.95 */ |
||
1366 | #define PNG_FILTER_HEURISTIC_WEIGHTED 2 /* Experimental feature */ |
||
1367 | #define PNG_FILTER_HEURISTIC_LAST 3 /* Not a valid value */ |
||
1368 | |||
1369 | |||
1370 | * 0 - 9, corresponding directly to the zlib compression levels 0 - 9 |
||
1371 | * (0 - no compression, 9 - "maximal" compression). Note that tests have |
||
1372 | * shown that zlib compression levels 3-6 usually perform as well as level 9 |
||
1373 | * for PNG images, and do considerably fewer caclulations. In the future, |
||
1374 | * these values may not correspond directly to the zlib compression levels. |
||
1375 | */ |
||
1376 | PNG_EXPORT(69, void, png_set_compression_level, |
||
1377 | (png_structp png_ptr, int level)); |
||
1378 | |||
1379 | |||
1380 | int mem_level)); |
||
1381 | |||
1382 | |||
1383 | int strategy)); |
||
1384 | |||
1385 | |||
1386 | int window_bits)); |
||
1387 | |||
1388 | |||
1389 | int method)); |
||
1390 | |||
1391 | |||
1392 | * handling. They are in the file pngrio.c, pngwio.c, and pngerror.c, |
||
1393 | * and call standard C I/O routines such as fread(), fwrite(), and |
||
1394 | * fprintf(). These functions can be made to use other I/O routines |
||
1395 | * at run time for those applications that need to handle I/O in a |
||
1396 | * different manner by calling png_set_???_fn(). See libpng-manual.txt for |
||
1397 | * more information. |
||
1398 | */ |
||
1399 | |||
1400 | |||
1401 | /* Initialize the input/output for the PNG file to the default functions. */ |
||
1402 | PNG_EXPORT(74, void, png_init_io, (png_structp png_ptr, png_FILE_p fp)); |
||
1403 | #endif |
||
1404 | |||
1405 | |||
1406 | * supplied functions. If no messages are to be printed you must still |
||
1407 | * write and use replacement functions. The replacement error_fn should |
||
1408 | * still do a longjmp to the last setjmp location if you are using this |
||
1409 | * method of error handling. If error_fn or warning_fn is NULL, the |
||
1410 | * default function will be used. |
||
1411 | */ |
||
1412 | |||
1413 | |||
1414 | (png_structp png_ptr, png_voidp error_ptr, |
||
1415 | png_error_ptr error_fn, png_error_ptr warning_fn)); |
||
1416 | |||
1417 | |||
1418 | PNG_EXPORT(76, png_voidp, png_get_error_ptr, (png_const_structp png_ptr)); |
||
1419 | |||
1420 | |||
1421 | * If buffered output is not used, then output_flush_fn can be set to NULL. |
||
1422 | * If PNG_WRITE_FLUSH_SUPPORTED is not defined at libpng compile time |
||
1423 | * output_flush_fn will be ignored (and thus can be NULL). |
||
1424 | * It is probably a mistake to use NULL for output_flush_fn if |
||
1425 | * write_data_fn is not also NULL unless you have built libpng with |
||
1426 | * PNG_WRITE_FLUSH_SUPPORTED undefined, because in this case libpng's |
||
1427 | * default flush function, which uses the standard *FILE structure, will |
||
1428 | * be used. |
||
1429 | */ |
||
1430 | PNG_EXPORT(77, void, png_set_write_fn, (png_structp png_ptr, png_voidp io_ptr, |
||
1431 | png_rw_ptr write_data_fn, png_flush_ptr output_flush_fn)); |
||
1432 | |||
1433 | |||
1434 | PNG_EXPORT(78, void, png_set_read_fn, (png_structp png_ptr, png_voidp io_ptr, |
||
1435 | png_rw_ptr read_data_fn)); |
||
1436 | |||
1437 | |||
1438 | PNG_EXPORT(79, png_voidp, png_get_io_ptr, (png_structp png_ptr)); |
||
1439 | |||
1440 | |||
1441 | png_read_status_ptr read_row_fn)); |
||
1442 | |||
1443 | |||
1444 | png_write_status_ptr write_row_fn)); |
||
1445 | |||
1446 | |||
1447 | /* Replace the default memory allocation functions with user supplied one(s). */ |
||
1448 | PNG_EXPORT(82, void, png_set_mem_fn, (png_structp png_ptr, png_voidp mem_ptr, |
||
1449 | png_malloc_ptr malloc_fn, png_free_ptr free_fn)); |
||
1450 | /* Return the user pointer associated with the memory functions */ |
||
1451 | PNG_EXPORT(83, png_voidp, png_get_mem_ptr, (png_const_structp png_ptr)); |
||
1452 | #endif |
||
1453 | |||
1454 | |||
1455 | PNG_EXPORT(84, void, png_set_read_user_transform_fn, (png_structp png_ptr, |
||
1456 | png_user_transform_ptr read_user_transform_fn)); |
||
1457 | #endif |
||
1458 | |||
1459 | |||
1460 | PNG_EXPORT(85, void, png_set_write_user_transform_fn, (png_structp png_ptr, |
||
1461 | png_user_transform_ptr write_user_transform_fn)); |
||
1462 | #endif |
||
1463 | |||
1464 | |||
1465 | PNG_EXPORT(86, void, png_set_user_transform_info, (png_structp png_ptr, |
||
1466 | png_voidp user_transform_ptr, int user_transform_depth, |
||
1467 | int user_transform_channels)); |
||
1468 | /* Return the user pointer associated with the user transform functions */ |
||
1469 | PNG_EXPORT(87, png_voidp, png_get_user_transform_ptr, |
||
1470 | (png_const_structp png_ptr)); |
||
1471 | #endif |
||
1472 | |||
1473 | |||
1474 | /* Return information about the row currently being processed. Note that these |
||
1475 | * APIs do not fail but will return unexpected results if called outside a user |
||
1476 | * transform callback. Also note that when transforming an interlaced image the |
||
1477 | * row number is still the row in the final, de-interlaced, image but the row |
||
1478 | * only contains the data of the current pass - consult png_row_info for the |
||
1479 | * actual width of the row! |
||
1480 | */ |
||
1481 | PNG_EXPORT(217, png_uint_32, png_get_current_row_number, (png_const_structp)); |
||
1482 | PNG_EXPORT(218, png_byte, png_get_current_pass_number, (png_const_structp)); |
||
1483 | #endif |
||
1484 | |||
1485 | |||
1486 | PNG_EXPORT(88, void, png_set_read_user_chunk_fn, (png_structp png_ptr, |
||
1487 | png_voidp user_chunk_ptr, png_user_chunk_ptr read_user_chunk_fn)); |
||
1488 | PNG_EXPORT(89, png_voidp, png_get_user_chunk_ptr, (png_const_structp png_ptr)); |
||
1489 | #endif |
||
1490 | |||
1491 | |||
1492 | /* Sets the function callbacks for the push reader, and a pointer to a |
||
1493 | * user-defined structure available to the callback functions. |
||
1494 | */ |
||
1495 | PNG_EXPORT(90, void, png_set_progressive_read_fn, (png_structp png_ptr, |
||
1496 | png_voidp progressive_ptr, png_progressive_info_ptr info_fn, |
||
1497 | png_progressive_row_ptr row_fn, png_progressive_end_ptr end_fn)); |
||
1498 | |||
1499 | |||
1500 | PNG_EXPORT(91, png_voidp, png_get_progressive_ptr, (png_const_structp png_ptr)); |
||
1501 | |||
1502 | |||
1503 | PNG_EXPORT(92, void, png_process_data, |
||
1504 | (png_structp png_ptr, png_infop info_ptr, |
||
1505 | png_bytep buffer, png_size_t buffer_size)); |
||
1506 | |||
1507 | |||
1508 | * processing of any more data. The function returns the number of bytes |
||
1509 | * remaining, excluding any that libpng has cached internally. A subsequent |
||
1510 | * call to png_process_data must supply these bytes again. If the argument |
||
1511 | * 'save' is set to true the routine will first save all the pending data and |
||
1512 | * will always return 0. |
||
1513 | */ |
||
1514 | PNG_EXPORT(219, png_size_t, png_process_data_pause, (png_structp, int save)); |
||
1515 | |||
1516 | |||
1517 | * png_process_data. It returns the number of bytes of data to skip in the |
||
1518 | * input. Normally it will return 0, but if it returns a non-zero value the |
||
1519 | * application must skip than number of bytes of input data and pass the |
||
1520 | * following data to the next call to png_process_data. |
||
1521 | */ |
||
1522 | PNG_EXPORT(220, png_uint_32, png_process_data_skip, (png_structp)); |
||
1523 | |||
1524 | |||
1525 | * the callback and be non-NULL if anything needs to be done; the library |
||
1526 | * stores its own version of the new data internally and ignores the passed |
||
1527 | * in value. |
||
1528 | */ |
||
1529 | PNG_EXPORT(93, void, png_progressive_combine_row, (png_structp png_ptr, |
||
1530 | png_bytep old_row, png_const_bytep new_row)); |
||
1531 | #endif /* PNG_PROGRESSIVE_READ_SUPPORTED */ |
||
1532 | |||
1533 | |||
1534 | (png_structp png_ptr, png_alloc_size_t size), |
||
1535 | PNG_ALLOCATED); |
||
1536 | /* Added at libpng version 1.4.0 */ |
||
1537 | PNG_EXPORTA(95, png_voidp, png_calloc, |
||
1538 | (png_structp png_ptr, png_alloc_size_t size), |
||
1539 | PNG_ALLOCATED); |
||
1540 | |||
1541 | |||
1542 | PNG_EXPORTA(96, png_voidp, png_malloc_warn, (png_structp png_ptr, |
||
1543 | png_alloc_size_t size), PNG_ALLOCATED); |
||
1544 | |||
1545 | |||
1546 | PNG_EXPORT(97, void, png_free, (png_structp png_ptr, png_voidp ptr)); |
||
1547 | |||
1548 | |||
1549 | PNG_EXPORT(98, void, png_free_data, |
||
1550 | (png_structp png_ptr, png_infop info_ptr, png_uint_32 free_me, int num)); |
||
1551 | |||
1552 | |||
1553 | * by libpng or by the application */ |
||
1554 | PNG_EXPORT(99, void, png_data_freer, |
||
1555 | (png_structp png_ptr, png_infop info_ptr, int freer, png_uint_32 mask)); |
||
1556 | |||
1557 | |||
1558 | #define PNG_DESTROY_WILL_FREE_DATA 1 |
||
1559 | #define PNG_SET_WILL_FREE_DATA 1 |
||
1560 | #define PNG_USER_WILL_FREE_DATA 2 |
||
1561 | /* Flags for png_ptr->free_me and info_ptr->free_me */ |
||
1562 | #define PNG_FREE_HIST 0x0008 |
||
1563 | #define PNG_FREE_ICCP 0x0010 |
||
1564 | #define PNG_FREE_SPLT 0x0020 |
||
1565 | #define PNG_FREE_ROWS 0x0040 |
||
1566 | #define PNG_FREE_PCAL 0x0080 |
||
1567 | #define PNG_FREE_SCAL 0x0100 |
||
1568 | #define PNG_FREE_UNKN 0x0200 |
||
1569 | #define PNG_FREE_LIST 0x0400 |
||
1570 | #define PNG_FREE_PLTE 0x1000 |
||
1571 | #define PNG_FREE_TRNS 0x2000 |
||
1572 | #define PNG_FREE_TEXT 0x4000 |
||
1573 | #define PNG_FREE_ALL 0x7fff |
||
1574 | #define PNG_FREE_MUL 0x4220 /* PNG_FREE_SPLT|PNG_FREE_TEXT|PNG_FREE_UNKN */ |
||
1575 | |||
1576 | |||
1577 | PNG_EXPORTA(100, png_voidp, png_malloc_default, (png_structp png_ptr, |
||
1578 | png_alloc_size_t size), PNG_ALLOCATED); |
||
1579 | PNG_EXPORT(101, void, png_free_default, (png_structp png_ptr, png_voidp ptr)); |
||
1580 | #endif |
||
1581 | |||
1582 | |||
1583 | /* Fatal error in PNG image of libpng - can't continue */ |
||
1584 | PNG_EXPORTA(102, void, png_error, |
||
1585 | (png_structp png_ptr, png_const_charp error_message), |
||
1586 | PNG_NORETURN); |
||
1587 | |||
1588 | |||
1589 | PNG_EXPORTA(103, void, png_chunk_error, (png_structp png_ptr, |
||
1590 | png_const_charp error_message), PNG_NORETURN); |
||
1591 | |||
1592 | |||
1593 | /* Fatal error in PNG image of libpng - can't continue */ |
||
1594 | PNG_EXPORTA(104, void, png_err, (png_structp png_ptr), PNG_NORETURN); |
||
1595 | #endif |
||
1596 | |||
1597 | |||
1598 | PNG_EXPORT(105, void, png_warning, (png_structp png_ptr, |
||
1599 | png_const_charp warning_message)); |
||
1600 | |||
1601 | |||
1602 | PNG_EXPORT(106, void, png_chunk_warning, (png_structp png_ptr, |
||
1603 | png_const_charp warning_message)); |
||
1604 | |||
1605 | |||
1606 | /* Benign error in libpng. Can continue, but may have a problem. |
||
1607 | * User can choose whether to handle as a fatal error or as a warning. */ |
||
1608 | # undef png_benign_error |
||
1609 | PNG_EXPORT(107, void, png_benign_error, (png_structp png_ptr, |
||
1610 | png_const_charp warning_message)); |
||
1611 | |||
1612 | |||
1613 | # undef png_chunk_benign_error |
||
1614 | PNG_EXPORT(108, void, png_chunk_benign_error, (png_structp png_ptr, |
||
1615 | png_const_charp warning_message)); |
||
1616 | |||
1617 | |||
1618 | (png_structp png_ptr, int allowed)); |
||
1619 | #else |
||
1620 | # ifdef PNG_ALLOW_BENIGN_ERRORS |
||
1621 | # define png_benign_error png_warning |
||
1622 | # define png_chunk_benign_error png_chunk_warning |
||
1623 | # else |
||
1624 | # define png_benign_error png_error |
||
1625 | # define png_chunk_benign_error png_chunk_error |
||
1626 | # endif |
||
1627 | #endif |
||
1628 | |||
1629 | |||
1630 | * Similarly, the png_get_ |
||
1631 | * png_info_struct, either storing the parameters in the passed variables, or |
||
1632 | * setting pointers into the png_info_struct where the data is stored. The |
||
1633 | * png_get_ |
||
1634 | * in info_ptr, or return zero and do not change any of the parameters if the |
||
1635 | * data was not available. |
||
1636 | * |
||
1637 | * These functions should be used instead of directly accessing png_info |
||
1638 | * to avoid problems with future changes in the size and internal layout of |
||
1639 | * png_info_struct. |
||
1640 | */ |
||
1641 | /* Returns "flag" if chunk data is valid in info_ptr. */ |
||
1642 | PNG_EXPORT(110, png_uint_32, png_get_valid, |
||
1643 | (png_const_structp png_ptr, png_const_infop info_ptr, |
||
1644 | png_uint_32 flag)); |
||
1645 | |||
1646 | |||
1647 | PNG_EXPORT(111, png_size_t, png_get_rowbytes, (png_const_structp png_ptr, |
||
1648 | png_const_infop info_ptr)); |
||
1649 | |||
1650 | |||
1651 | /* Returns row_pointers, which is an array of pointers to scanlines that was |
||
1652 | * returned from png_read_png(). |
||
1653 | */ |
||
1654 | PNG_EXPORT(112, png_bytepp, png_get_rows, |
||
1655 | (png_const_structp png_ptr, png_const_infop info_ptr)); |
||
1656 | /* Set row_pointers, which is an array of pointers to scanlines for use |
||
1657 | * by png_write_png(). |
||
1658 | */ |
||
1659 | PNG_EXPORT(113, void, png_set_rows, (png_structp png_ptr, |
||
1660 | png_infop info_ptr, png_bytepp row_pointers)); |
||
1661 | #endif |
||
1662 | |||
1663 | |||
1664 | PNG_EXPORT(114, png_byte, png_get_channels, |
||
1665 | (png_const_structp png_ptr, png_const_infop info_ptr)); |
||
1666 | |||
1667 | |||
1668 | /* Returns image width in pixels. */ |
||
1669 | PNG_EXPORT(115, png_uint_32, png_get_image_width, (png_const_structp png_ptr, |
||
1670 | png_const_infop info_ptr)); |
||
1671 | |||
1672 | |||
1673 | PNG_EXPORT(116, png_uint_32, png_get_image_height, (png_const_structp png_ptr, |
||
1674 | png_const_infop info_ptr)); |
||
1675 | |||
1676 | |||
1677 | PNG_EXPORT(117, png_byte, png_get_bit_depth, |
||
1678 | (png_const_structp png_ptr, png_const_infop info_ptr)); |
||
1679 | |||
1680 | |||
1681 | PNG_EXPORT(118, png_byte, png_get_color_type, (png_const_structp png_ptr, |
||
1682 | png_const_infop info_ptr)); |
||
1683 | |||
1684 | |||
1685 | PNG_EXPORT(119, png_byte, png_get_filter_type, (png_const_structp png_ptr, |
||
1686 | png_const_infop info_ptr)); |
||
1687 | |||
1688 | |||
1689 | PNG_EXPORT(120, png_byte, png_get_interlace_type, (png_const_structp png_ptr, |
||
1690 | png_const_infop info_ptr)); |
||
1691 | |||
1692 | |||
1693 | PNG_EXPORT(121, png_byte, png_get_compression_type, (png_const_structp png_ptr, |
||
1694 | png_const_infop info_ptr)); |
||
1695 | |||
1696 | |||
1697 | PNG_EXPORT(122, png_uint_32, png_get_pixels_per_meter, |
||
1698 | (png_const_structp png_ptr, png_const_infop info_ptr)); |
||
1699 | PNG_EXPORT(123, png_uint_32, png_get_x_pixels_per_meter, |
||
1700 | (png_const_structp png_ptr, png_const_infop info_ptr)); |
||
1701 | PNG_EXPORT(124, png_uint_32, png_get_y_pixels_per_meter, |
||
1702 | (png_const_structp png_ptr, png_const_infop info_ptr)); |
||
1703 | |||
1704 | |||
1705 | PNG_FP_EXPORT(125, float, png_get_pixel_aspect_ratio, |
||
1706 | (png_const_structp png_ptr, png_const_infop info_ptr)); |
||
1707 | PNG_FIXED_EXPORT(210, png_fixed_point, png_get_pixel_aspect_ratio_fixed, |
||
1708 | (png_const_structp png_ptr, png_const_infop info_ptr)); |
||
1709 | |||
1710 | |||
1711 | PNG_EXPORT(126, png_int_32, png_get_x_offset_pixels, |
||
1712 | (png_const_structp png_ptr, png_const_infop info_ptr)); |
||
1713 | PNG_EXPORT(127, png_int_32, png_get_y_offset_pixels, |
||
1714 | (png_const_structp png_ptr, png_const_infop info_ptr)); |
||
1715 | PNG_EXPORT(128, png_int_32, png_get_x_offset_microns, |
||
1716 | (png_const_structp png_ptr, png_const_infop info_ptr)); |
||
1717 | PNG_EXPORT(129, png_int_32, png_get_y_offset_microns, |
||
1718 | (png_const_structp png_ptr, png_const_infop info_ptr)); |
||
1719 | |||
1720 | |||
1721 | |||
1722 | |||
1723 | PNG_EXPORT(130, png_const_bytep, png_get_signature, |
||
1724 | (png_const_structp png_ptr, png_infop info_ptr)); |
||
1725 | |||
1726 | |||
1727 | PNG_EXPORT(131, png_uint_32, png_get_bKGD, |
||
1728 | (png_const_structp png_ptr, png_infop info_ptr, |
||
1729 | png_color_16p *background)); |
||
1730 | #endif |
||
1731 | |||
1732 | |||
1733 | PNG_EXPORT(132, void, png_set_bKGD, (png_structp png_ptr, png_infop info_ptr, |
||
1734 | png_const_color_16p background)); |
||
1735 | #endif |
||
1736 | |||
1737 | |||
1738 | PNG_FP_EXPORT(133, png_uint_32, png_get_cHRM, (png_const_structp png_ptr, |
||
1739 | png_const_infop info_ptr, double *white_x, double *white_y, double *red_x, |
||
1740 | double *red_y, double *green_x, double *green_y, double *blue_x, |
||
1741 | double *blue_y)); |
||
1742 | #ifdef PNG_FIXED_POINT_SUPPORTED /* Otherwise not implemented */ |
||
1743 | PNG_FIXED_EXPORT(134, png_uint_32, png_get_cHRM_fixed, |
||
1744 | (png_const_structp png_ptr, |
||
1745 | png_const_infop info_ptr, png_fixed_point *int_white_x, |
||
1746 | png_fixed_point *int_white_y, png_fixed_point *int_red_x, |
||
1747 | png_fixed_point *int_red_y, png_fixed_point *int_green_x, |
||
1748 | png_fixed_point *int_green_y, png_fixed_point *int_blue_x, |
||
1749 | png_fixed_point *int_blue_y)); |
||
1750 | #endif |
||
1751 | #endif |
||
1752 | |||
1753 | |||
1754 | PNG_FP_EXPORT(135, void, png_set_cHRM, |
||
1755 | (png_structp png_ptr, png_infop info_ptr, |
||
1756 | double white_x, double white_y, double red_x, double red_y, double green_x, |
||
1757 | double green_y, double blue_x, double blue_y)); |
||
1758 | PNG_FIXED_EXPORT(136, void, png_set_cHRM_fixed, (png_structp png_ptr, |
||
1759 | png_infop info_ptr, png_fixed_point int_white_x, |
||
1760 | png_fixed_point int_white_y, png_fixed_point int_red_x, |
||
1761 | png_fixed_point int_red_y, png_fixed_point int_green_x, |
||
1762 | png_fixed_point int_green_y, png_fixed_point int_blue_x, |
||
1763 | png_fixed_point int_blue_y)); |
||
1764 | #endif |
||
1765 | |||
1766 | |||
1767 | PNG_FP_EXPORT(137, png_uint_32, png_get_gAMA, |
||
1768 | (png_const_structp png_ptr, png_const_infop info_ptr, |
||
1769 | double *file_gamma)); |
||
1770 | PNG_FIXED_EXPORT(138, png_uint_32, png_get_gAMA_fixed, |
||
1771 | (png_const_structp png_ptr, png_const_infop info_ptr, |
||
1772 | png_fixed_point *int_file_gamma)); |
||
1773 | #endif |
||
1774 | |||
1775 | |||
1776 | PNG_FP_EXPORT(139, void, png_set_gAMA, (png_structp png_ptr, |
||
1777 | png_infop info_ptr, double file_gamma)); |
||
1778 | PNG_FIXED_EXPORT(140, void, png_set_gAMA_fixed, (png_structp png_ptr, |
||
1779 | png_infop info_ptr, png_fixed_point int_file_gamma)); |
||
1780 | #endif |
||
1781 | |||
1782 | |||
1783 | PNG_EXPORT(141, png_uint_32, png_get_hIST, |
||
1784 | (png_const_structp png_ptr, png_const_infop info_ptr, |
||
1785 | png_uint_16p *hist)); |
||
1786 | #endif |
||
1787 | |||
1788 | |||
1789 | PNG_EXPORT(142, void, png_set_hIST, (png_structp png_ptr, |
||
1790 | png_infop info_ptr, png_const_uint_16p hist)); |
||
1791 | #endif |
||
1792 | |||
1793 | |||
1794 | (png_structp png_ptr, png_infop info_ptr, |
||
1795 | png_uint_32 *width, png_uint_32 *height, int *bit_depth, int *color_type, |
||
1796 | int *interlace_method, int *compression_method, int *filter_method)); |
||
1797 | |||
1798 | |||
1799 | (png_structp png_ptr, png_infop info_ptr, |
||
1800 | png_uint_32 width, png_uint_32 height, int bit_depth, int color_type, |
||
1801 | int interlace_method, int compression_method, int filter_method)); |
||
1802 | |||
1803 | |||
1804 | PNG_EXPORT(145, png_uint_32, png_get_oFFs, |
||
1805 | (png_const_structp png_ptr, png_const_infop info_ptr, |
||
1806 | png_int_32 *offset_x, png_int_32 *offset_y, int *unit_type)); |
||
1807 | #endif |
||
1808 | |||
1809 | |||
1810 | PNG_EXPORT(146, void, png_set_oFFs, |
||
1811 | (png_structp png_ptr, png_infop info_ptr, |
||
1812 | png_int_32 offset_x, png_int_32 offset_y, int unit_type)); |
||
1813 | #endif |
||
1814 | |||
1815 | |||
1816 | PNG_EXPORT(147, png_uint_32, png_get_pCAL, |
||
1817 | (png_const_structp png_ptr, png_const_infop info_ptr, |
||
1818 | png_charp *purpose, png_int_32 *X0, png_int_32 *X1, int *type, |
||
1819 | int *nparams, |
||
1820 | png_charp *units, png_charpp *params)); |
||
1821 | #endif |
||
1822 | |||
1823 | |||
1824 | PNG_EXPORT(148, void, png_set_pCAL, (png_structp png_ptr, |
||
1825 | png_infop info_ptr, |
||
1826 | png_const_charp purpose, png_int_32 X0, png_int_32 X1, int type, |
||
1827 | int nparams, png_const_charp units, png_charpp params)); |
||
1828 | #endif |
||
1829 | |||
1830 | |||
1831 | PNG_EXPORT(149, png_uint_32, png_get_pHYs, |
||
1832 | (png_const_structp png_ptr, png_const_infop info_ptr, |
||
1833 | png_uint_32 *res_x, png_uint_32 *res_y, int *unit_type)); |
||
1834 | #endif |
||
1835 | |||
1836 | |||
1837 | PNG_EXPORT(150, void, png_set_pHYs, |
||
1838 | (png_structp png_ptr, png_infop info_ptr, |
||
1839 | png_uint_32 res_x, png_uint_32 res_y, int unit_type)); |
||
1840 | #endif |
||
1841 | |||
1842 | |||
1843 | (png_const_structp png_ptr, png_const_infop info_ptr, |
||
1844 | png_colorp *palette, int *num_palette)); |
||
1845 | |||
1846 | |||
1847 | (png_structp png_ptr, png_infop info_ptr, |
||
1848 | png_const_colorp palette, int num_palette)); |
||
1849 | |||
1850 | |||
1851 | PNG_EXPORT(153, png_uint_32, png_get_sBIT, |
||
1852 | (png_const_structp png_ptr, png_infop info_ptr, |
||
1853 | png_color_8p *sig_bit)); |
||
1854 | #endif |
||
1855 | |||
1856 | |||
1857 | PNG_EXPORT(154, void, png_set_sBIT, |
||
1858 | (png_structp png_ptr, png_infop info_ptr, png_const_color_8p sig_bit)); |
||
1859 | #endif |
||
1860 | |||
1861 | |||
1862 | PNG_EXPORT(155, png_uint_32, png_get_sRGB, (png_const_structp png_ptr, |
||
1863 | png_const_infop info_ptr, int *file_srgb_intent)); |
||
1864 | #endif |
||
1865 | |||
1866 | |||
1867 | PNG_EXPORT(156, void, png_set_sRGB, |
||
1868 | (png_structp png_ptr, png_infop info_ptr, int srgb_intent)); |
||
1869 | PNG_EXPORT(157, void, png_set_sRGB_gAMA_and_cHRM, (png_structp png_ptr, |
||
1870 | png_infop info_ptr, int srgb_intent)); |
||
1871 | #endif |
||
1872 | |||
1873 | |||
1874 | PNG_EXPORT(158, png_uint_32, png_get_iCCP, |
||
1875 | (png_const_structp png_ptr, png_const_infop info_ptr, |
||
1876 | png_charpp name, int *compression_type, png_bytepp profile, |
||
1877 | png_uint_32 *proflen)); |
||
1878 | #endif |
||
1879 | |||
1880 | |||
1881 | PNG_EXPORT(159, void, png_set_iCCP, |
||
1882 | (png_structp png_ptr, png_infop info_ptr, |
||
1883 | png_const_charp name, int compression_type, png_const_bytep profile, |
||
1884 | png_uint_32 proflen)); |
||
1885 | #endif |
||
1886 | |||
1887 | |||
1888 | PNG_EXPORT(160, png_uint_32, png_get_sPLT, |
||
1889 | (png_const_structp png_ptr, png_const_infop info_ptr, |
||
1890 | png_sPLT_tpp entries)); |
||
1891 | #endif |
||
1892 | |||
1893 | |||
1894 | PNG_EXPORT(161, void, png_set_sPLT, |
||
1895 | (png_structp png_ptr, png_infop info_ptr, |
||
1896 | png_const_sPLT_tp entries, int nentries)); |
||
1897 | #endif |
||
1898 | |||
1899 | |||
1900 | /* png_get_text also returns the number of text chunks in *num_text */ |
||
1901 | PNG_EXPORT(162, png_uint_32, png_get_text, |
||
1902 | (png_const_structp png_ptr, png_const_infop info_ptr, |
||
1903 | png_textp *text_ptr, int *num_text)); |
||
1904 | #endif |
||
1905 | |||
1906 | |||
1907 | * language, and translated keywords are NULL pointers, the structure |
||
1908 | * returned by png_get_text will always contain regular |
||
1909 | * zero-terminated C strings. They might be empty strings but |
||
1910 | * they will never be NULL pointers. |
||
1911 | */ |
||
1912 | |||
1913 | |||
1914 | PNG_EXPORT(163, void, png_set_text, |
||
1915 | (png_structp png_ptr, png_infop info_ptr, |
||
1916 | png_const_textp text_ptr, int num_text)); |
||
1917 | #endif |
||
1918 | |||
1919 | |||
1920 | PNG_EXPORT(164, png_uint_32, png_get_tIME, |
||
1921 | (png_const_structp png_ptr, png_infop info_ptr, png_timep *mod_time)); |
||
1922 | #endif |
||
1923 | |||
1924 | |||
1925 | PNG_EXPORT(165, void, png_set_tIME, |
||
1926 | (png_structp png_ptr, png_infop info_ptr, png_const_timep mod_time)); |
||
1927 | #endif |
||
1928 | |||
1929 | |||
1930 | PNG_EXPORT(166, png_uint_32, png_get_tRNS, |
||
1931 | (png_const_structp png_ptr, png_infop info_ptr, |
||
1932 | png_bytep *trans_alpha, int *num_trans, png_color_16p *trans_color)); |
||
1933 | #endif |
||
1934 | |||
1935 | |||
1936 | PNG_EXPORT(167, void, png_set_tRNS, |
||
1937 | (png_structp png_ptr, png_infop info_ptr, |
||
1938 | png_const_bytep trans_alpha, int num_trans, |
||
1939 | png_const_color_16p trans_color)); |
||
1940 | #endif |
||
1941 | |||
1942 | |||
1943 | PNG_FP_EXPORT(168, png_uint_32, png_get_sCAL, |
||
1944 | (png_const_structp png_ptr, png_const_infop info_ptr, |
||
1945 | int *unit, double *width, double *height)); |
||
1946 | #ifdef PNG_FLOATING_ARITHMETIC_SUPPORTED |
||
1947 | /* NOTE: this API is currently implemented using floating point arithmetic, |
||
1948 | * consequently it can only be used on systems with floating point support. |
||
1949 | * In any case the range of values supported by png_fixed_point is small and it |
||
1950 | * is highly recommended that png_get_sCAL_s be used instead. |
||
1951 | */ |
||
1952 | PNG_FIXED_EXPORT(214, png_uint_32, png_get_sCAL_fixed, |
||
1953 | (png_structp png_ptr, png_const_infop info_ptr, int *unit, |
||
1954 | png_fixed_point *width, |
||
1955 | png_fixed_point *height)); |
||
1956 | #endif |
||
1957 | PNG_EXPORT(169, png_uint_32, png_get_sCAL_s, |
||
1958 | (png_const_structp png_ptr, png_const_infop info_ptr, |
||
1959 | int *unit, png_charpp swidth, png_charpp sheight)); |
||
1960 | |||
1961 | |||
1962 | (png_structp png_ptr, png_infop info_ptr, |
||
1963 | int unit, double width, double height)); |
||
1964 | PNG_FIXED_EXPORT(213, void, png_set_sCAL_fixed, (png_structp png_ptr, |
||
1965 | png_infop info_ptr, int unit, png_fixed_point width, |
||
1966 | png_fixed_point height)); |
||
1967 | PNG_EXPORT(171, void, png_set_sCAL_s, |
||
1968 | (png_structp png_ptr, png_infop info_ptr, |
||
1969 | int unit, png_const_charp swidth, png_const_charp sheight)); |
||
1970 | #endif /* PNG_sCAL_SUPPORTED */ |
||
1971 | |||
1972 | |||
1973 | /* Provide a list of chunks and how they are to be handled, if the built-in |
||
1974 | handling or default unknown chunk handling is not desired. Any chunks not |
||
1975 | listed will be handled in the default manner. The IHDR and IEND chunks |
||
1976 | must not be listed. |
||
1977 | keep = 0: follow default behaviour |
||
1978 | = 1: do not keep |
||
1979 | = 2: keep only if safe-to-copy |
||
1980 | = 3: keep even if unsafe-to-copy |
||
1981 | */ |
||
1982 | PNG_EXPORT(172, void, png_set_keep_unknown_chunks, |
||
1983 | (png_structp png_ptr, int keep, |
||
1984 | png_const_bytep chunk_list, int num_chunks)); |
||
1985 | PNG_EXPORT(173, int, png_handle_as_unknown, (png_structp png_ptr, |
||
1986 | png_const_bytep chunk_name)); |
||
1987 | #endif |
||
1988 | #ifdef PNG_UNKNOWN_CHUNKS_SUPPORTED |
||
1989 | PNG_EXPORT(174, void, png_set_unknown_chunks, (png_structp png_ptr, |
||
1990 | png_infop info_ptr, png_const_unknown_chunkp unknowns, |
||
1991 | int num_unknowns)); |
||
1992 | PNG_EXPORT(175, void, png_set_unknown_chunk_location, |
||
1993 | (png_structp png_ptr, png_infop info_ptr, int chunk, int location)); |
||
1994 | PNG_EXPORT(176, int, png_get_unknown_chunks, (png_const_structp png_ptr, |
||
1995 | png_const_infop info_ptr, png_unknown_chunkpp entries)); |
||
1996 | #endif |
||
1997 | |||
1998 | |||
1999 | * If you need to turn it off for a chunk that your application has freed, |
||
2000 | * you can use png_set_invalid(png_ptr, info_ptr, PNG_INFO_CHNK); |
||
2001 | */ |
||
2002 | PNG_EXPORT(177, void, png_set_invalid, |
||
2003 | (png_structp png_ptr, png_infop info_ptr, int mask)); |
||
2004 | |||
2005 | |||
2006 | /* The "params" pointer is currently not used and is for future expansion. */ |
||
2007 | PNG_EXPORT(178, void, png_read_png, (png_structp png_ptr, png_infop info_ptr, |
||
2008 | int transforms, png_voidp params)); |
||
2009 | PNG_EXPORT(179, void, png_write_png, (png_structp png_ptr, png_infop info_ptr, |
||
2010 | int transforms, png_voidp params)); |
||
2011 | #endif |
||
2012 | |||
2013 | |||
2014 | (png_const_structp png_ptr)); |
||
2015 | PNG_EXPORT(181, png_const_charp, png_get_header_ver, |
||
2016 | (png_const_structp png_ptr)); |
||
2017 | PNG_EXPORT(182, png_const_charp, png_get_header_version, |
||
2018 | (png_const_structp png_ptr)); |
||
2019 | PNG_EXPORT(183, png_const_charp, png_get_libpng_ver, |
||
2020 | (png_const_structp png_ptr)); |
||
2021 | |||
2022 | |||
2023 | PNG_EXPORT(184, png_uint_32, png_permit_mng_features, (png_structp png_ptr, |
||
2024 | png_uint_32 mng_features_permitted)); |
||
2025 | #endif |
||
2026 | |||
2027 | |||
2028 | #define PNG_HANDLE_CHUNK_AS_DEFAULT 0 |
||
2029 | #define PNG_HANDLE_CHUNK_NEVER 1 |
||
2030 | #define PNG_HANDLE_CHUNK_IF_SAFE 2 |
||
2031 | #define PNG_HANDLE_CHUNK_ALWAYS 3 |
||
2032 | |||
2033 | |||
2034 | * messages before passing them to the error or warning handler. |
||
2035 | */ |
||
2036 | #ifdef PNG_ERROR_NUMBERS_SUPPORTED |
||
2037 | PNG_EXPORT(185, void, png_set_strip_error_numbers, |
||
2038 | (png_structp png_ptr, |
||
2039 | png_uint_32 strip_mode)); |
||
2040 | #endif |
||
2041 | |||
2042 | |||
2043 | #ifdef PNG_SET_USER_LIMITS_SUPPORTED |
||
2044 | PNG_EXPORT(186, void, png_set_user_limits, (png_structp png_ptr, |
||
2045 | png_uint_32 user_width_max, png_uint_32 user_height_max)); |
||
2046 | PNG_EXPORT(187, png_uint_32, png_get_user_width_max, |
||
2047 | (png_const_structp png_ptr)); |
||
2048 | PNG_EXPORT(188, png_uint_32, png_get_user_height_max, |
||
2049 | (png_const_structp png_ptr)); |
||
2050 | /* Added in libpng-1.4.0 */ |
||
2051 | PNG_EXPORT(189, void, png_set_chunk_cache_max, (png_structp png_ptr, |
||
2052 | png_uint_32 user_chunk_cache_max)); |
||
2053 | PNG_EXPORT(190, png_uint_32, png_get_chunk_cache_max, |
||
2054 | (png_const_structp png_ptr)); |
||
2055 | /* Added in libpng-1.4.1 */ |
||
2056 | PNG_EXPORT(191, void, png_set_chunk_malloc_max, (png_structp png_ptr, |
||
2057 | png_alloc_size_t user_chunk_cache_max)); |
||
2058 | PNG_EXPORT(192, png_alloc_size_t, png_get_chunk_malloc_max, |
||
2059 | (png_const_structp png_ptr)); |
||
2060 | #endif |
||
2061 | |||
2062 | |||
2063 | PNG_EXPORT(193, png_uint_32, png_get_pixels_per_inch, |
||
2064 | (png_const_structp png_ptr, png_const_infop info_ptr)); |
||
2065 | |||
2066 | |||
2067 | (png_const_structp png_ptr, png_const_infop info_ptr)); |
||
2068 | |||
2069 | |||
2070 | (png_const_structp png_ptr, png_const_infop info_ptr)); |
||
2071 | |||
2072 | |||
2073 | (png_const_structp png_ptr, png_const_infop info_ptr)); |
||
2074 | #ifdef PNG_FIXED_POINT_SUPPORTED /* otherwise not implemented. */ |
||
2075 | PNG_FIXED_EXPORT(211, png_fixed_point, png_get_x_offset_inches_fixed, |
||
2076 | (png_structp png_ptr, png_const_infop info_ptr)); |
||
2077 | #endif |
||
2078 | |||
2079 | |||
2080 | png_const_infop info_ptr)); |
||
2081 | #ifdef PNG_FIXED_POINT_SUPPORTED /* otherwise not implemented. */ |
||
2082 | PNG_FIXED_EXPORT(212, png_fixed_point, png_get_y_offset_inches_fixed, |
||
2083 | (png_structp png_ptr, png_const_infop info_ptr)); |
||
2084 | #endif |
||
2085 | |||
2086 | |||
2087 | PNG_EXPORT(198, png_uint_32, png_get_pHYs_dpi, (png_const_structp png_ptr, |
||
2088 | png_const_infop info_ptr, png_uint_32 *res_x, png_uint_32 *res_y, |
||
2089 | int *unit_type)); |
||
2090 | # endif /* PNG_pHYs_SUPPORTED */ |
||
2091 | #endif /* PNG_INCH_CONVERSIONS_SUPPORTED */ |
||
2092 | |||
2093 | |||
2094 | #ifdef PNG_IO_STATE_SUPPORTED |
||
2095 | PNG_EXPORT(199, png_uint_32, png_get_io_state, (png_structp png_ptr)); |
||
2096 | |||
2097 | |||
2098 | (png_structp png_ptr), PNG_DEPRECATED); |
||
2099 | PNG_EXPORT(216, png_uint_32, png_get_io_chunk_type, |
||
2100 | (png_const_structp png_ptr)); |
||
2101 | |||
2102 | |||
2103 | # define PNG_IO_NONE 0x0000 /* no I/O at this moment */ |
||
2104 | # define PNG_IO_READING 0x0001 /* currently reading */ |
||
2105 | # define PNG_IO_WRITING 0x0002 /* currently writing */ |
||
2106 | # define PNG_IO_SIGNATURE 0x0010 /* currently at the file signature */ |
||
2107 | # define PNG_IO_CHUNK_HDR 0x0020 /* currently at the chunk header */ |
||
2108 | # define PNG_IO_CHUNK_DATA 0x0040 /* currently at the chunk data */ |
||
2109 | # define PNG_IO_CHUNK_CRC 0x0080 /* currently at the chunk crc */ |
||
2110 | # define PNG_IO_MASK_OP 0x000f /* current operation: reading/writing */ |
||
2111 | # define PNG_IO_MASK_LOC 0x00f0 /* current location: sig/hdr/data/crc */ |
||
2112 | #endif /* ?PNG_IO_STATE_SUPPORTED */ |
||
2113 | |||
2114 | |||
2115 | * libpng interlace handling is turned off the macros may be used to handle |
||
2116 | * interlaced images within the application. |
||
2117 | */ |
||
2118 | #define PNG_INTERLACE_ADAM7_PASSES 7 |
||
2119 | |||
2120 | |||
2121 | * full, image which appears in a given pass. 'pass' is in the range 0 |
||
2122 | * to 6 and the result is in the range 0 to 7. |
||
2123 | */ |
||
2124 | #define PNG_PASS_START_ROW(pass) (((1U&~(pass))<<(3-((pass)>>1)))&7) |
||
2125 | #define PNG_PASS_START_COL(pass) (((1U& (pass))<<(3-(((pass)+1)>>1)))&7) |
||
2126 | |||
2127 | |||
2128 | * pass. This is expressed as a shift - effectively log2 of the number or |
||
2129 | * rows or columns in each 8x8 tile of the original image. |
||
2130 | */ |
||
2131 | #define PNG_PASS_ROW_SHIFT(pass) ((pass)>2?(8-(pass))>>1:3) |
||
2132 | #define PNG_PASS_COL_SHIFT(pass) ((pass)>1?(7-(pass))>>1:3) |
||
2133 | |||
2134 | |||
2135 | * pass of an image given its height or width. In fact these macros may |
||
2136 | * return non-zero even though the sub-image is empty, because the other |
||
2137 | * dimension may be empty for a small image. |
||
2138 | */ |
||
2139 | #define PNG_PASS_ROWS(height, pass) (((height)+(((1< |
||
2140 | -1)-PNG_PASS_START_ROW(pass)))>>PNG_PASS_ROW_SHIFT(pass)) |
||
2141 | #define PNG_PASS_COLS(width, pass) (((width)+(((1< |
||
2142 | -1)-PNG_PASS_START_COL(pass)))>>PNG_PASS_COL_SHIFT(pass)) |
||
2143 | |||
2144 | |||
2145 | * image given a row in an interlaced image, so two more macros: |
||
2146 | */ |
||
2147 | #define PNG_ROW_FROM_PASS_ROW(yIn, pass) \ |
||
2148 | (((yIn)< |
||
2149 | #define PNG_COL_FROM_PASS_COL(xIn, pass) \ |
||
2150 | (((xIn)< |
||
2151 | |||
2152 | |||
2153 | * or column is in a particular pass. These use a common utility macro that |
||
2154 | * returns a mask for a given pass - the offset 'off' selects the row or |
||
2155 | * column version. The mask has the appropriate bit set for each column in |
||
2156 | * the tile. |
||
2157 | */ |
||
2158 | #define PNG_PASS_MASK(pass,off) ( \ |
||
2159 | ((0x110145AFU>>(((7-(off))-(pass))<<2)) & 0xFU) | \ |
||
2160 | ((0x01145AF0U>>(((7-(off))-(pass))<<2)) & 0xF0U)) |
||
2161 | |||
2162 | |||
2163 | ((PNG_PASS_MASK(pass,0) >> ((y)&7)) & 1) |
||
2164 | #define PNG_COL_IN_INTERLACE_PASS(x, pass) \ |
||
2165 | ((PNG_PASS_MASK(pass,1) >> ((x)&7)) & 1) |
||
2166 | |||
2167 | |||
2168 | /* With these routines we avoid an integer divide, which will be slower on |
||
2169 | * most machines. However, it does take more operations than the corresponding |
||
2170 | * divide method, so it may be slower on a few RISC systems. There are two |
||
2171 | * shifts (by 8 or 16 bits) and an addition, versus a single integer divide. |
||
2172 | * |
||
2173 | * Note that the rounding factors are NOT supposed to be the same! 128 and |
||
2174 | * 32768 are correct for the NODIV code; 127 and 32767 are correct for the |
||
2175 | * standard method. |
||
2176 | * |
||
2177 | * [Optimized code by Greg Roelofs and Mark Adler...blame us for bugs. :-) ] |
||
2178 | */ |
||
2179 | |||
2180 | |||
2181 | |||
2182 | |||
2183 | { png_uint_16 temp = (png_uint_16)((png_uint_16)(fg) \ |
||
2184 | * (png_uint_16)(alpha) \ |
||
2185 | + (png_uint_16)(bg)*(png_uint_16)(255 \ |
||
2186 | - (png_uint_16)(alpha)) + (png_uint_16)128); \ |
||
2187 | (composite) = (png_byte)((temp + (temp >> 8)) >> 8); } |
||
2188 | |||
2189 | |||
2190 | { png_uint_32 temp = (png_uint_32)((png_uint_32)(fg) \ |
||
2191 | * (png_uint_32)(alpha) \ |
||
2192 | + (png_uint_32)(bg)*(png_uint_32)(65535L \ |
||
2193 | - (png_uint_32)(alpha)) + (png_uint_32)32768L); \ |
||
2194 | (composite) = (png_uint_16)((temp + (temp >> 16)) >> 16); } |
||
2195 | |||
2196 | |||
2197 | |||
2198 | |||
2199 | (composite) = (png_byte)(((png_uint_16)(fg) * (png_uint_16)(alpha) + \ |
||
2200 | (png_uint_16)(bg) * (png_uint_16)(255 - (png_uint_16)(alpha)) + \ |
||
2201 | (png_uint_16)127) / 255) |
||
2202 | |||
2203 | |||
2204 | (composite) = (png_uint_16)(((png_uint_32)(fg) * (png_uint_32)(alpha) + \ |
||
2205 | (png_uint_32)(bg)*(png_uint_32)(65535L - (png_uint_32)(alpha)) + \ |
||
2206 | (png_uint_32)32767) / (png_uint_32)65535L) |
||
2207 | #endif /* PNG_READ_COMPOSITE_NODIV_SUPPORTED */ |
||
2208 | |||
2209 | |||
2210 | PNG_EXPORT(201, png_uint_32, png_get_uint_32, (png_const_bytep buf)); |
||
2211 | PNG_EXPORT(202, png_uint_16, png_get_uint_16, (png_const_bytep buf)); |
||
2212 | PNG_EXPORT(203, png_int_32, png_get_int_32, (png_const_bytep buf)); |
||
2213 | #endif |
||
2214 | |||
2215 | |||
2216 | png_const_bytep buf)); |
||
2217 | /* No png_get_int_16 -- may be added if there's a real need for it. */ |
||
2218 | |||
2219 | |||
2220 | #ifdef PNG_WRITE_INT_FUNCTIONS_SUPPORTED |
||
2221 | PNG_EXPORT(205, void, png_save_uint_32, (png_bytep buf, png_uint_32 i)); |
||
2222 | #endif |
||
2223 | #ifdef PNG_SAVE_INT_32_SUPPORTED |
||
2224 | PNG_EXPORT(206, void, png_save_int_32, (png_bytep buf, png_int_32 i)); |
||
2225 | #endif |
||
2226 | |||
2227 | |||
2228 | * The parameter is declared unsigned int, not png_uint_16, |
||
2229 | * just to avoid potential problems on pre-ANSI C compilers. |
||
2230 | */ |
||
2231 | #ifdef PNG_WRITE_INT_FUNCTIONS_SUPPORTED |
||
2232 | PNG_EXPORT(207, void, png_save_uint_16, (png_bytep buf, unsigned int i)); |
||
2233 | /* No png_save_int_16 -- may be added if there's a real need for it. */ |
||
2234 | #endif |
||
2235 | |||
2236 | |||
2237 | /* Inline macros to do direct reads of bytes from the input buffer. |
||
2238 | * The png_get_int_32() routine assumes we are using two's complement |
||
2239 | * format for negative values, which is almost certainly true. |
||
2240 | */ |
||
2241 | # define png_get_uint_32(buf) \ |
||
2242 | (((png_uint_32)(*(buf)) << 24) + \ |
||
2243 | ((png_uint_32)(*((buf) + 1)) << 16) + \ |
||
2244 | ((png_uint_32)(*((buf) + 2)) << 8) + \ |
||
2245 | ((png_uint_32)(*((buf) + 3)))) |
||
2246 | |||
2247 | |||
2248 | * function) incorrectly returned a value of type png_uint_32. |
||
2249 | */ |
||
2250 | # define png_get_uint_16(buf) \ |
||
2251 | ((png_uint_16) \ |
||
2252 | (((unsigned int)(*(buf)) << 8) + \ |
||
2253 | ((unsigned int)(*((buf) + 1))))) |
||
2254 | |||
2255 | |||
2256 | ((png_int_32)((*(buf) & 0x80) \ |
||
2257 | ? -((png_int_32)((png_get_uint_32(buf) ^ 0xffffffffL) + 1)) \ |
||
2258 | : (png_int_32)png_get_uint_32(buf))) |
||
2259 | #endif |
||
2260 | |||
2261 | |||
2262 | * defs |
||
2263 | */ |
||
2264 | |||
2265 | |||
2266 | * one to use is one more than this.) Maintainer, remember to add an entry to |
||
2267 | * scripts/symbols.def as well. |
||
2268 | */ |
||
2269 | #ifdef PNG_EXPORT_LAST_ORDINAL |
||
2270 | PNG_EXPORT_LAST_ORDINAL(220); |
||
2271 | #endif |
||
2272 | |||
2273 | |||
2274 | } |
||
2275 | #endif |
||
2276 | |||
2277 | |||
2278 | /* Do not put anything past this line */ |
||
2279 | #endif /* PNG_H */><>><>><>><>2))><2))>2))><2))> |
||
2280 |