added OO interfaces for some filters
[imager.git] / image.h
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1#ifndef _IMAGE_H_
2#define _IMAGE_H_
3
4#include "io.h"
5#include "iolayer.h"
6#include "log.h"
7#include "stackmach.h"
8
9
10#ifndef _MSC_VER
11#include <unistd.h>
12#endif
13#include <string.h>
14#include <stdio.h>
15#include <math.h>
16#include <stdlib.h>
17
18#ifdef SUNOS
19#include <strings.h>
20#endif
21
22#ifndef PI
23#define PI 3.14159265358979323846
24#endif
25
26#ifndef MAXINT
27#define MAXINT 2147483647
28#endif
29
30#include "datatypes.h"
31
32undef_int i_has_format(char *frmt);
33
34/* constructors and destructors */
35
36i_color *ICL_new_internal( unsigned char r,unsigned char g,unsigned char b,unsigned char a);
37i_color *ICL_set_internal(i_color *cl,unsigned char r,unsigned char g,unsigned char b,unsigned char a);
38void ICL_info (i_color *cl);
39void ICL_DESTROY (i_color *cl);
40void ICL_add (i_color *dst, i_color *src, int ch);
41
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42extern i_fcolor *i_fcolor_new(double r, double g, double b, double a);
43extern void i_fcolor_destroy(i_fcolor *cl);
44
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45i_img *IIM_new(int x,int y,int ch);
46void IIM_DESTROY(i_img *im);
47i_img *i_img_new( void );
48i_img *i_img_empty(i_img *im,int x,int y);
49i_img *i_img_empty_ch(i_img *im,int x,int y,int ch);
50void i_img_exorcise(i_img *im);
51void i_img_destroy(i_img *im);
52
53void i_img_info(i_img *im,int *info);
54
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55extern i_img *i_sametype(i_img *im, int xsize, int ysize);
56
57i_img *i_img_pal_new(int x, int y, int ch, int maxpal);
58
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59/* Image feature settings */
60
61void i_img_setmask (i_img *im,int ch_mask);
62int i_img_getmask (i_img *im);
63int i_img_getchannels(i_img *im);
64
65/* Base functions */
66
67int i_ppix(i_img *im,int x,int y,i_color *val);
68int i_gpix(i_img *im,int x,int y,i_color *val);
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69int i_ppixf(i_img *im,int x,int y,i_color *val);
70int i_gpixf(i_img *im,int x,int y,i_color *val);
02d1d628 71
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72#define i_ppix(im, x, y, val) (((im)->i_f_ppix)((im), (x), (y), (val)))
73#define i_gpix(im, x, y, val) (((im)->i_f_gpix)((im), (x), (y), (val)))
74#define i_ppixf(im, x, y, val) (((im)->i_f_ppixf)((im), (x), (y), (val)))
75#define i_gpixf(im, x, y, val) (((im)->i_f_gpixf)((im), (x), (y), (val)))
76
77#if 0
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78int i_ppix_d(i_img *im,int x,int y,i_color *val);
79int i_gpix_d(i_img *im,int x,int y,i_color *val);
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80int i_plin_d(i_img *im,int l, int r, int y, i_color *val);
81int i_glin_d(i_img *im,int l, int r, int y, i_color *val);
faa9b3e7 82#endif
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83
84#define i_plin(im, l, r, y, val) (((im)->i_f_plin)(im, l, r, y, val))
85#define i_glin(im, l, r, y, val) (((im)->i_f_glin)(im, l, r, y, val))
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86#define i_plinf(im, l, r, y, val) (((im)->i_f_plinf)(im, l, r, y, val))
87#define i_glinf(im, l, r, y, val) (((im)->i_f_glinf)(im, l, r, y, val))
88
89#define i_gsamp(im, l, r, y, samps, chans, count) \
90 (((im)->i_f_gsamp)((im), (l), (r), (y), (samps), (chans), (count)))
91#define i_gsampf(im, l, r, y, samps, chans, count) \
92 (((im)->i_f_gsampf)((im), (l), (r), (y), (samps), (chans), (count)))
93
94#define i_findcolor(im, color, entry) \
95 (((im)->i_f_findcolor) ? ((im)->i_f_findcolor)((im), (color), (entry)) : 0)
96
97#define i_gpal(im, l, r, y, vals) \
98 (((im)->i_f_gpal) ? ((im)->i_f_gpal)((im), (l), (r), (y), (vals)) : 0)
99#define i_ppal(im, l, r, y, vals) \
100 (((im)->i_f_ppal) ? ((im)->i_f_ppal)((im), (l), (r), (y), (vals)) : 0)
101#define i_addcolors(im, colors, count) \
261f91c5 102 (((im)->i_f_addcolors) ? ((im)->i_f_addcolors)((im), (colors), (count)) : -1)
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103#define i_getcolors(im, index, color, count) \
104 (((im)->i_f_getcolors) ? \
105 ((im)->i_f_getcolors)((im), (index), (color), (count)) : 0)
106#define i_setcolors(im, index, color, count) \
107 (((im)->i_f_setcolors) ? \
108 ((im)->i_f_setcolors)((im), (index), (color), (count)) : 0)
109#define i_colorcount(im) \
110 (((im)->i_f_colorcount) ? ((im)->i_f_colorcount)(im) : -1)
111#define i_maxcolors(im) \
112 (((im)->i_f_maxcolors) ? ((im)->i_f_maxcolors)(im) : -1)
113#define i_findcolor(im, color, entry) \
114 (((im)->i_f_findcolor) ? ((im)->i_f_findcolor)((im), (color), (entry)) : 0)
115
116#define i_img_virtual(im) ((im)->virtual)
117#define i_img_type(im) ((im)->type)
118#define i_img_bits(im) ((im)->bits)
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119
120float i_gpix_pch(i_img *im,int x,int y,int ch);
121
122/* functions for drawing primitives */
123
124void i_box (i_img *im,int x1,int y1,int x2,int y2,i_color *val);
125void i_box_filled (i_img *im,int x1,int y1,int x2,int y2,i_color *val);
126void i_draw (i_img *im,int x1,int y1,int x2,int y2,i_color *val);
127void i_line_aa (i_img *im,int x1,int y1,int x2,int y2,i_color *val);
128void i_arc (i_img *im,int x,int y,float rad,float d1,float d2,i_color *val);
6af18d2b 129void i_circle_aa (i_img *im,float x, float y,float rad,i_color *val);
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130void i_copyto (i_img *im,i_img *src,int x1,int y1,int x2,int y2,int tx,int ty);
131void i_copyto_trans(i_img *im,i_img *src,int x1,int y1,int x2,int y2,int tx,int ty,i_color *trans);
132void i_copy (i_img *im,i_img *src);
faa9b3e7 133int i_rubthru (i_img *im,i_img *src,int tx,int ty);
02d1d628 134
142c26ff 135undef_int i_flipxy (i_img *im, int direction);
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136extern i_img *i_rotate90(i_img *im, int degrees);
137extern i_img *i_rotate_exact(i_img *im, double amount);
138extern i_img *i_matrix_transform(i_img *im, int xsize, int ysize, double *matrix);
142c26ff 139
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140void i_bezier_multi(i_img *im,int l,double *x,double *y,i_color *val);
141void i_poly_aa (i_img *im,int l,double *x,double *y,i_color *val);
142
143void i_flood_fill (i_img *im,int seedx,int seedy,i_color *dcol);
144
145/* image processing functions */
146
147void i_gaussian (i_img *im,float stdev);
148void i_conv (i_img *im,float *coeff,int len);
149
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150/* colour manipulation */
151extern int i_convert(i_img *im, i_img *src, float *coeff, int outchan, int inchan);
faa9b3e7 152extern void i_map(i_img *im, unsigned char (*maps)[256], unsigned int mask);
f5991c03 153
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154float i_img_diff (i_img *im1,i_img *im2);
155
156/* font routines */
157
158undef_int i_init_fonts( void );
159
160#ifdef HAVE_LIBT1
161#include <t1lib.h>
162
163undef_int init_t1( void );
164int i_t1_new( char *pfb, char *afm );
165int i_t1_destroy( int font_id );
166undef_int i_t1_cp( i_img *im, int xb, int yb, int channel, int fontnum, float points, char* str, int len, int align );
167undef_int i_t1_text( i_img *im, int xb, int yb, i_color *cl, int fontnum, float points, char* str, int len, int align );
168void i_t1_bbox( int fontnum, float point, char *str, int len, int cords[6] );
169void i_t1_set_aa( int st );
170void close_t1( void );
171
172#endif
173
174#ifdef HAVE_LIBTT
175
176#include <freetype.h>
177#define TT_CHC 5
178
179struct TT_Instancehandle_ {
180 TT_Instance instance;
181 TT_Instance_Metrics imetrics;
182 TT_Glyph_Metrics gmetrics[256];
183 TT_Glyph glyphs[256];
184 int smooth;
185 int ptsize;
186 int order;
187};
188
189typedef struct TT_Instancehandle_ TT_Instancehandle;
190
191struct TT_Fonthandle_ {
192 TT_Face face;
193 TT_Face_Properties properties;
194 TT_Instancehandle instanceh[TT_CHC];
195 TT_CharMap char_map;
196};
197
198typedef struct TT_Fonthandle_ TT_Fonthandle;
199
200
201
202undef_int init_tt( void );
203TT_Fonthandle* i_tt_new(char *fontname);
204void i_tt_destroy( TT_Fonthandle *handle );
205undef_int i_tt_cp( TT_Fonthandle *handle,i_img *im,int xb,int yb,int channel,float points,char* txt,int len,int smooth);
206undef_int i_tt_text( TT_Fonthandle *handle, i_img *im, int xb, int yb, i_color *cl, float points, char* txt, int len, int smooth);
207undef_int i_tt_bbox( TT_Fonthandle *handle, float points,char *txt,int len,int cords[6]);
208
209
210#endif /* End of freetype headers */
211
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212#ifdef HAVE_FT2
213
214typedef struct FT2_Fonthandle FT2_Fonthandle;
215extern int i_ft2_init(void);
216extern FT2_Fonthandle * i_ft2_new(char *name, int index);
217extern void i_ft2_destroy(FT2_Fonthandle *handle);
218extern int i_ft2_setdpi(FT2_Fonthandle *handle, int xdpi, int ydpi);
219extern int i_ft2_getdpi(FT2_Fonthandle *handle, int *xdpi, int *ydpi);
220extern int i_ft2_settransform(FT2_Fonthandle *handle, double *matrix);
221extern int i_ft2_sethinting(FT2_Fonthandle *handle, int hinting);
222extern int i_ft2_bbox(FT2_Fonthandle *handle, double cheight, double cwidth,
223 char *text, int len, int *bbox);
224extern int i_ft2_text(FT2_Fonthandle *handle, i_img *im, int tx, int ty,
225 i_color *cl, double cheight, double cwidth,
226 char *text, int len, int align, int aa, int vlayout,
227 int utf8);
228extern int i_ft2_cp(FT2_Fonthandle *handle, i_img *im, int tx, int ty,
229 int channel, double cheight, double cwidth,
230 char *text, int len, int align, int aa, int vlayout,
231 int utf8);
02d1d628 232
faa9b3e7 233#endif
02d1d628 234
faa9b3e7 235#ifdef WIN32
02d1d628 236
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237extern int i_wf_bbox(char *face, int size, char *text, int length, int *bbox);
238extern int i_wf_text(char *face, i_img *im, int tx, int ty, i_color *cl,
239 int size, char *text, int len, int align, int aa);
240extern int i_wf_cp(char *face, i_img *im, int tx, int ty, int channel,
241 int size, char *text, int len, int align, int aa);
02d1d628 242
faa9b3e7 243#endif
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244
245/* functions for reading and writing formats */
246
247/* general reader callback
248 userdata - data the user passed into the reader
249 buffer - the buffer to fill with data
250 need - the amount of data needed
251 want - the amount of space we have to store data
252 fill buffer and return the number of bytes read, 0 for eof, -1 for error
253*/
254
255typedef int (*i_read_callback_t)(char *userdata, char *buffer, int need,
256 int want);
257
258/* i_gen_reader() translates the low-level requests from whatever library
259 into buffered requests.
260 but the called function can always bypass buffering by only ever
261 reading I<need> bytes.
262*/
263#define CBBUFSIZ 4096
264
265typedef struct {
266 i_read_callback_t cb;
267 char *userdata;
268 char buffer[CBBUFSIZ];
269 int length;
270 int cpos;
271} i_gen_read_data;
272
273extern int i_gen_reader(i_gen_read_data *info, char *buffer, int need);
274extern i_gen_read_data *i_gen_read_data_new(i_read_callback_t cb, char *userdata);
275extern void free_gen_read_data(i_gen_read_data *);
276
277/* general writer callback
278 userdata - the data the user passed into the writer
279 data - the data to write
280 data_size - the number of bytes to write
281 write the data, return non-zero on success, zero on failure.
282*/
283typedef int (*i_write_callback_t)(char *userdata, char const *data, int size);
284
285typedef struct {
286 i_write_callback_t cb;
287 char *userdata;
288 char buffer[CBBUFSIZ];
289 int maxlength;
290 int filledto;
291} i_gen_write_data;
292
293extern int i_gen_writer(i_gen_write_data *info, char const *data, int size);
294extern i_gen_write_data *i_gen_write_data_new(i_write_callback_t cb, char *userdata, int maxlength);
295extern int free_gen_write_data(i_gen_write_data *, int flush);
296
297/* transparency handling for quantized output */
298typedef enum i_transp_tag {
299 tr_none, /* ignore any alpha channel */
300 tr_threshold, /* threshold the transparency - uses tr_threshold */
301 tr_errdiff, /* error diffusion */
302 tr_ordered /* an ordered dither */
303} i_transp;
304
305/* controls how we build the colour map */
306typedef enum i_make_colors_tag {
307 mc_none, /* user supplied colour map only */
308 mc_web_map, /* Use the 216 colour web colour map */
309 mc_addi, /* Addi's algorithm */
310 mc_mask = 0xFF /* (mask for generator) */
311} i_make_colors;
312
313/* controls how we translate the colours */
314typedef enum i_translate_tag {
315 pt_giflib, /* get gif lib to do it (ignores make_colours) */
316 pt_closest, /* just use the closest match within the hashbox */
317 pt_perturb, /* randomly perturb the data - uses perturb_size*/
318 pt_errdiff /* error diffusion dither - uses errdiff */
319} i_translate;
320
321/* Which error diffusion map to use */
322typedef enum i_errdiff_tag {
323 ed_floyd, /* floyd-steinberg */
324 ed_jarvis, /* Jarvis, Judice and Ninke */
325 ed_stucki, /* Stucki */
326 ed_custom, /* the map found in ed_map|width|height|orig */
327 ed_mask = 0xFF, /* mask to get the map */
328 ed_bidir = 0x100 /* change direction for each row */
329} i_errdiff;
330
331/* which ordered dither map to use
332 currently only available for transparency
333 I don't know of a way to do ordered dither of an image against some
334 general palette
335 */
336typedef enum i_ord_dith_tag
337{
338 od_random, /* sort of random */
339 od_dot8, /* large dot */
340 od_dot4,
341 od_hline,
342 od_vline,
343 od_slashline, /* / line dither */
344 od_backline, /* \ line dither */
34ba4c5b 345 od_tiny, /* small checkerbox */
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346 od_custom /* custom 8x8 map */
347} i_ord_dith;
348
349typedef struct i_gif_pos_tag {
350 int x, y;
351} i_gif_pos;
352
353/* passed into i_writegif_gen() to control quantization */
354typedef struct i_quantize_tag {
355 /* how to handle transparency */
356 i_transp transp;
357 /* the threshold at which to make pixels opaque */
358 int tr_threshold;
359 i_errdiff tr_errdiff;
360 i_ord_dith tr_orddith;
361 unsigned char tr_custom[64];
362
363 /* how to make the colour map */
364 i_make_colors make_colors;
365
366 /* any existing colours
367 mc_existing is an existing colour table
368 mc_count is the number of existing colours
369 mc_size is the total size of the array that mc_existing points
370 at - this must be at least 256
371 */
372 i_color *mc_colors;
373 int mc_size;
374 int mc_count;
375
376 /* how we translate the colours */
377 i_translate translate;
378
379 /* the error diffusion map to use if translate is mc_errdiff */
380 i_errdiff errdiff;
381 /* the following define the error diffusion values to use if
382 errdiff is ed_custom. ed_orig is the column on the top row that
383 represents the current
384 */
385 int *ed_map;
386 int ed_width, ed_height, ed_orig;
387
388 /* the amount of perturbation to use for translate is mc_perturb */
389 int perturb;
390} i_quantize;
391
392typedef struct i_gif_opts {
393 /* each image has a local color map */
394 int each_palette;
395
396 /* images are interlaced */
397 int interlace;
398
399 /* time for which image is displayed
400 (in 1/100 seconds)
401 default: 0
402 */
403 int delay_count;
404 int *delays;
405
406 /* user input flags
407 default: 0
408 */
409 int user_input_count;
410 char *user_input_flags;
411
412 /* disposal
413 default: 0 */
414 int disposal_count;
415 char *disposal;
416
417 /* this is added to the color table when we make an image transparent */
418 i_color tran_color;
419
420 /* image positions */
421 int position_count;
422 i_gif_pos *positions;
423
424 /* Netscape loop extension - number of loops */
425 int loop_count;
426} i_gif_opts;
427
428extern void quant_makemap(i_quantize *quant, i_img **imgs, int count);
429extern i_palidx *quant_translate(i_quantize *quant, i_img *img);
430extern void quant_transparent(i_quantize *quant, i_palidx *indices, i_img *img, i_palidx trans_index);
431
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432extern i_img *i_img_pal_new(int x, int y, int channels, int maxpal);
433extern i_img *i_img_pal_new_low(i_img *im, int x, int y, int channels, int maxpal);
434extern i_img *i_img_to_pal(i_img *src, i_quantize *quant);
435extern i_img *i_img_to_rgb(i_img *src);
436extern i_img *i_img_masked_new(i_img *targ, i_img *mask, int x, int y,
437 int w, int h);
438extern i_img *i_img_16_new(int x, int y, int ch);
439extern i_img *i_img_16_new_low(i_img *im, int x, int y, int ch);
440
02d1d628 441#ifdef HAVE_LIBJPEG
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442i_img *
443i_readjpeg_wiol(io_glue *ig, int length, char** iptc_itext, int *itlength);
444undef_int i_writejpeg_wiol(i_img *im, io_glue *ig, int qfactor);
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445#endif /* HAVE_LIBJPEG */
446
447#ifdef HAVE_LIBTIFF
04418ecc 448i_img * i_readtiff_wiol(io_glue *ig, int length);
02d1d628 449undef_int i_writetiff_wiol(i_img *im, io_glue *ig);
4c2d6970 450undef_int i_writetiff_wiol_faxable(i_img *im, io_glue *ig, int fine);
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451
452#endif /* HAVE_LIBTIFF */
453
454#ifdef HAVE_LIBPNG
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455i_img *i_readpng_wiol(io_glue *ig, int length);
456undef_int i_writepng_wiol(i_img *im, io_glue *ig);
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457#endif /* HAVE_LIBPNG */
458
459#ifdef HAVE_LIBGIF
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460i_img *i_readgif(int fd, int **colour_table, int *colours);
461i_img *i_readgif_scalar(char *data, int length, int **colour_table, int *colours);
462i_img *i_readgif_callback(i_read_callback_t callback, char *userdata, int **colour_table, int *colours);
463extern i_img **i_readgif_multi(int fd, int *count);
464extern i_img **i_readgif_multi_scalar(char *data, int length, int *count);
465extern i_img **i_readgif_multi_callback(i_read_callback_t callback, char *userdata, int *count);
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466undef_int i_writegif(i_img *im,int fd,int colors,int pixdev,int fixedlen,i_color fixed[]);
467undef_int i_writegifmc(i_img *im,int fd,int colors);
468undef_int i_writegifex(i_img *im,int fd);
469undef_int i_writegif_gen(i_quantize *quant, int fd, i_img **imgs, int count, i_gif_opts *opts);
470undef_int i_writegif_callback(i_quantize *quant, i_write_callback_t cb, char *userdata, int maxbuffer, i_img **imgs, int count, i_gif_opts *opts);
471
472void i_qdist(i_img *im);
473
474#endif /* HAVE_LIBGIF */
475
04418ecc 476i_img * i_readraw_wiol(io_glue *ig, int x, int y, int datachannels, int storechannels, int intrl);
895dbd34 477undef_int i_writeraw_wiol(i_img* im, io_glue *ig);
02d1d628 478
04418ecc 479i_img * i_readpnm_wiol(io_glue *ig, int length);
067d6bdc 480undef_int i_writeppm_wiol(i_img *im, io_glue *ig);
02d1d628 481
261f91c5 482extern int i_writebmp_wiol(i_img *im, io_glue *ig);
d08b8f85 483extern i_img *i_readbmp_wiol(io_glue *ig);
02d1d628 484
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485i_img * i_scaleaxis(i_img *im, float Value, int Axis);
486i_img * i_scale_nn(i_img *im, float scx, float scy);
487i_img * i_haar(i_img *im);
488int i_count_colors(i_img *im,int maxc);
02d1d628 489
04418ecc 490i_img * i_transform(i_img *im, int *opx,int opxl,int *opy,int opyl,double parm[],int parmlen);
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491
492struct rm_op;
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493i_img * i_transform2(int width, int height, int channels,
494 struct rm_op *ops, int ops_count,
495 double *n_regs, int n_regs_count,
496 i_color *c_regs, int c_regs_count,
497 i_img **in_imgs, int in_imgs_count);
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498/* filters */
499
500void i_contrast(i_img *im, float intensity);
501void i_hardinvert(i_img *im);
502void i_noise(i_img *im, float amount, unsigned char type);
503void i_bumpmap(i_img *im,i_img *bump,int channel,int light_x,int light_y,int strength);
504void i_postlevels(i_img *im,int levels);
505void i_mosaic(i_img *im,int size);
506void i_watermark(i_img *im,i_img *wmark,int tx,int ty,int pixdiff);
507void i_autolevels(i_img *im,float lsat,float usat,float skew);
508void i_radnoise(i_img *im,int xo,int yo,float rscale,float ascale);
509void i_turbnoise(i_img *im,float xo,float yo,float scale);
510void i_gradgen(i_img *im, int num, int *xo, int *yo, i_color *ival, int dmeasure);
511void i_nearest_color(i_img *im, int num, int *xo, int *yo, i_color *ival, int dmeasure);
512
513/* Debug only functions */
514
515void malloc_state( void );
516
517/* this is sort of obsolete now */
518
519typedef struct {
520 undef_int (*i_has_format)(char *frmt);
521 i_color*(*ICL_set)(i_color *cl,unsigned char r,unsigned char g,unsigned char b,unsigned char a);
522 void (*ICL_info)(i_color *cl);
523
524 i_img*(*i_img_new)( void );
525 i_img*(*i_img_empty)(i_img *im,int x,int y);
526 i_img*(*i_img_empty_ch)(i_img *im,int x,int y,int ch);
527 void(*i_img_exorcise)(i_img *im);
528
529 void(*i_img_info)(i_img *im,int *info);
530
531 void(*i_img_setmask)(i_img *im,int ch_mask);
532 int (*i_img_getmask)(i_img *im);
533
534 int (*i_ppix)(i_img *im,int x,int y,i_color *val);
535 int (*i_gpix)(i_img *im,int x,int y,i_color *val);
536
537 void(*i_box)(i_img *im,int x1,int y1,int x2,int y2,i_color *val);
538 void(*i_draw)(i_img *im,int x1,int y1,int x2,int y2,i_color *val);
539 void(*i_arc)(i_img *im,int x,int y,float rad,float d1,float d2,i_color *val);
540 void(*i_copyto)(i_img *im,i_img *src,int x1,int y1,int x2,int y2,int tx,int ty);
541 void(*i_copyto_trans)(i_img *im,i_img *src,int x1,int y1,int x2,int y2,int tx,int ty,i_color *trans);
faa9b3e7 542 int(*i_rubthru)(i_img *im,i_img *src,int tx,int ty);
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543
544} symbol_table_t;
545
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546/* error handling
547 see error.c for documentation
548 the error information is currently global
549*/
550typedef struct {
551 char *msg;
552 int code;
553} i_errmsg;
a743c0a6 554
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555typedef void (*i_error_cb)(int code, char const *msg);
556typedef void (*i_failed_cb)(i_errmsg *msgs);
557extern i_error_cb i_set_error_cb(i_error_cb);
558extern i_failed_cb i_set_failed_cb(i_failed_cb);
559extern void i_set_argv0(char const *);
560extern int i_set_errors_fatal(int new_fatal);
faa9b3e7 561extern i_errmsg *i_errors(void);
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562
563extern void i_push_error(int code, char const *msg);
564extern void i_push_errorf(int code, char const *fmt, ...);
565extern void i_push_errorvf(int code, char const *fmt, va_list);
faa9b3e7 566extern void i_clear_error(void);
848ba81a 567extern int i_failed(int code, char const *msg);
02d1d628 568
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569/* image tag processing */
570extern void i_tags_new(i_img_tags *tags);
571extern int i_tags_addn(i_img_tags *tags, char *name, int code, int idata);
572extern int i_tags_add(i_img_tags *tags, char *name, int code, char *data,
573 int size, int idata);
574extern void i_tags_destroy(i_img_tags *tags);
575extern int i_tags_find(i_img_tags *tags, char *name, int start, int *entry);
576extern int i_tags_findn(i_img_tags *tags, int code, int start, int *entry);
577extern int i_tags_delete(i_img_tags *tags, int entry);
578extern int i_tags_delbyname(i_img_tags *tags, char *name);
579extern int i_tags_delbycode(i_img_tags *tags, int code);
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580
581#endif