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02d1d62 Initial revision
Arnar Mar Hrafnkelsson authored Mar 25, 2001
1 #ifndef _DATATYPES_H_
2 #define _DATATYPES_H_
3
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4 #include "imconfig.h"
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5 #include "imio.h"
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6
7 #define MAXCHANNELS 4
8
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9 /* used for palette indices in some internal code (which might be
10 exposed at some point
11 */
12 typedef unsigned char i_palidx;
13
14 /* We handle 2 types of sample, this is hopefully the most common, and the
15 smaller of the ones we support */
16 typedef unsigned char i_sample_t;
17
18 typedef struct { i_sample_t gray_color; } gray_color;
19 typedef struct { i_sample_t r,g,b; } rgb_color;
20 typedef struct { i_sample_t r,g,b,a; } rgba_color;
21 typedef struct { i_sample_t c,m,y,k; } cmyk_color;
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22
23 typedef int undef_int; /* special value to put in typemaps to retun undef on 0 and 1 on 1 */
24
25 typedef union {
26 gray_color gray;
27 rgb_color rgb;
28 rgba_color rgba;
29 cmyk_color cmyk;
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30 i_sample_t channel[MAXCHANNELS];
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31 unsigned int ui;
32 } i_color;
33
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34 /* this is the larger sample type, it should be able to accurately represent
35 any sample size we use */
36 typedef double i_fsample_t;
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37
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38 typedef struct { i_fsample_t gray_color; } i_fgray_color_t;
39 typedef struct { i_fsample_t r, g, b; } i_frgb_color_t;
40 typedef struct { i_fsample_t r, g, b, a; } i_frgba_color_t;
41 typedef struct { i_fsample_t c, m, y, k; } i_fcmyk_color_t;
42
43 typedef union {
44 i_fgray_color_t gray;
45 i_frgb_color_t rgb;
46 i_frgba_color_t rgba;
47 i_fcmyk_color_t cmyk;
48 i_fsample_t channel[MAXCHANNELS];
49 } i_fcolor;
50
51 typedef enum {
52 i_direct_type, /* direct colour, keeps RGB values per pixel */
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53 i_palette_type /* keeps a palette index per pixel */
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54 } i_img_type_t;
55
56 typedef enum {
57 /* bits per sample, not per pixel */
58 /* a paletted image might have one bit per sample */
59 i_8_bits = 8,
60 i_16_bits = 16,
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61 i_double_bits = sizeof(double) * 8
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62 } i_img_bits_t;
63
64 typedef struct {
65 char *name; /* name of a given tag, might be NULL */
66 int code; /* number of a given tag, -1 if it has no meaning */
67 char *data; /* value of a given tag if it's not an int, may be NULL */
68 int size; /* size of the data */
69 int idata; /* value of a given tag if data is NULL */
70 } i_img_tag;
71
72 typedef struct {
73 int count; /* how many tags have been set */
74 int alloc; /* how many tags have been allocated for */
75 i_img_tag *tags;
76 } i_img_tags;
77
78 typedef struct i_img_ i_img;
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79 typedef int (*i_f_ppix_t)(i_img *im, int x, int y, const i_color *pix);
80 typedef int (*i_f_ppixf_t)(i_img *im, int x, int y, const i_fcolor *pix);
81 typedef int (*i_f_plin_t)(i_img *im, int x, int r, int y, const i_color *vals);
82 typedef int (*i_f_plinf_t)(i_img *im, int x, int r, int y, const i_fcolor *vals);
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83 typedef int (*i_f_gpix_t)(i_img *im, int x, int y, i_color *pix);
84 typedef int (*i_f_gpixf_t)(i_img *im, int x, int y, i_fcolor *pix);
85 typedef int (*i_f_glin_t)(i_img *im, int x, int r, int y, i_color *vals);
86 typedef int (*i_f_glinf_t)(i_img *im, int x, int r, int y, i_fcolor *vals);
87
88 typedef int (*i_f_gsamp_t)(i_img *im, int x, int r, int y, i_sample_t *samp,
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89 const int *chans, int chan_count);
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90 typedef int (*i_f_gsampf_t)(i_img *im, int x, int r, int y, i_fsample_t *samp,
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91 const int *chan, int chan_count);
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92
93 typedef int (*i_f_gpal_t)(i_img *im, int x, int r, int y, i_palidx *vals);
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94 typedef int (*i_f_ppal_t)(i_img *im, int x, int r, int y, const i_palidx *vals);
95 typedef int (*i_f_addcolors_t)(i_img *im, const i_color *colors, int count);
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96 typedef int (*i_f_getcolors_t)(i_img *im, int i, i_color *, int count);
97 typedef int (*i_f_colorcount_t)(i_img *im);
98 typedef int (*i_f_maxcolors_t)(i_img *im);
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99 typedef int (*i_f_findcolor_t)(i_img *im, const i_color *color, i_palidx *entry);
100 typedef int (*i_f_setcolors_t)(i_img *im, int index, const i_color *colors,
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101 int count);
102
103 typedef void (*i_f_destroy_t)(i_img *im);
104
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105 typedef int (*i_f_gsamp_bits_t)(i_img *im, int x, int r, int y, unsigned *samp,
106 const int *chans, int chan_count, int bits);
107 typedef int (*i_f_psamp_bits_t)(i_img *im, int x, int r, int y, unsigned const *samp,
108 const int *chans, int chan_count, int bits);
109
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110 typedef int i_img_dim;
111
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112 /*
113 =item i_img
114 =category Data Types
115 =synopsis i_img *img;
116
117 This is Imager's image type.
118
119 It contains the following members:
120
121 =over
122
123 =item *
124
125 channels - the number of channels in the image
126
127 =item *
128
129 xsize, ysize - the width and height of the image in pixels
130
131 =item *
132
133 bytes - the number of bytes used to store the image data. Undefined
134 where virtual is non-zero.
135
136 =item *
137
138 ch_mask - a mask of writable channels. eg. if this is 6 then only
139 channels 1 and 2 are writable. There may be bits set for which there
140 are no channels in the image.
141
142 =item *
143
144 bits - the number of bits stored per sample. Should be one of
145 i_8_bits, i_16_bits, i_double_bits.
146
147 =item *
148
149 type - either i_direct_type for direct color images, or i_palette_type
150 for paletted images.
151
152 =item *
153
154 virtual - if zero then this image is-self contained. If non-zero then
155 this image could be an interface to some other implementation.
156
157 =item *
158
159 idata - the image data. This should not be directly accessed. A new
160 image implementation can use this to store its image data.
161 i_img_destroy() will myfree() this pointer if it's non-null.
162
163 =item *
164
165 tags - a structure storing the image's tags. This should only be
166 accessed via the i_tags_*() functions.
167
168 =item *
169
170 ext_data - a pointer for use internal to an image implementation.
171 This should be freed by the image's destroy handler.
172
173 =item *
174
175 im_data - data internal to Imager. This is initialized by
176 i_img_init().
177
178 =item *
179
180 i_f_ppix, i_f_ppixf, i_f_plin, i_f_plinf, i_f_gpix, i_f_gpixf,
181 i_f_glin, i_f_glinf, i_f_gsamp, i_f_gampf - implementations for each
182 of the required image functions. An image implementation should
183 initialize these between calling i_img_alloc() and i_img_init().
184
185 =item *
186
187 i_f_gpal, i_f_ppal, i_f_addcolors, i_f_getcolors, i_f_colorcount,
188 i_f_maxcolors, i_f_findcolor, i_f_setcolors - implementations for each
189 paletted image function.
190
191 =item *
192
193 i_f_destroy - custom image destruction function. This should be used
194 to release memory if necessary.
195
196 =item *
197
198 i_f_gsamp_bits - implements i_gsamp_bits() for this image.
199
200 =item *
201
202 i_f_psamp_bits - implements i_psamp_bits() for this image.
203
204 =back
205
206 =cut
207 */
208
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209 struct i_img_ {
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210 int channels;
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211 i_img_dim xsize,ysize;
212 size_t bytes;
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213 unsigned int ch_mask;
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214 i_img_bits_t bits;
215 i_img_type_t type;
216 int virtual; /* image might not keep any data, must use functions */
217 unsigned char *idata; /* renamed to force inspection of existing code */
218 /* can be NULL if virtual is non-zero */
219 i_img_tags tags;
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220
221 void *ext_data;
222
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223 /* interface functions */
224 i_f_ppix_t i_f_ppix;
225 i_f_ppixf_t i_f_ppixf;
226 i_f_plin_t i_f_plin;
227 i_f_plinf_t i_f_plinf;
228 i_f_gpix_t i_f_gpix;
229 i_f_gpixf_t i_f_gpixf;
230 i_f_glin_t i_f_glin;
231 i_f_glinf_t i_f_glinf;
232 i_f_gsamp_t i_f_gsamp;
233 i_f_gsampf_t i_f_gsampf;
234
235 /* only valid for type == i_palette_type */
236 i_f_gpal_t i_f_gpal;
237 i_f_ppal_t i_f_ppal;
238 i_f_addcolors_t i_f_addcolors;
239 i_f_getcolors_t i_f_getcolors;
240 i_f_colorcount_t i_f_colorcount;
241 i_f_maxcolors_t i_f_maxcolors;
242 i_f_findcolor_t i_f_findcolor;
243 i_f_setcolors_t i_f_setcolors;
244
245 i_f_destroy_t i_f_destroy;
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246
247 /* as of 0.61 */
248 i_f_gsamp_bits_t i_f_gsamp_bits;
249 i_f_psamp_bits_t i_f_psamp_bits;
250
251 void *im_data;
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252 };
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253
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254 /* ext_data for paletted images
255 */
256 typedef struct {
257 int count; /* amount of space used in palette (in entries) */
258 int alloc; /* amount of space allocated for palette (in entries) */
259 i_color *pal;
260 int last_found;
261 } i_img_pal_ext;
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262
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263 /* Helper datatypes
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264 The types in here so far are:
265
266 doubly linked bucket list - pretty efficient
267 octtree - no idea about goodness
268
269 needed: hashes.
270
271 */
272
273
274
275
276
277 /* bitmap mask */
278
279 struct i_bitmap {
280 int xsize,ysize;
281 char *data;
282 };
283
284 struct i_bitmap* btm_new(int xsize,int ysize);
285 void btm_destroy(struct i_bitmap *btm);
286 int btm_test(struct i_bitmap *btm,int x,int y);
287 void btm_set(struct i_bitmap *btm,int x,int y);
288
289
290
291
292
293
294
295
296 /* Stack/Linked list */
297
298 struct llink {
299 struct llink *p,*n;
300 void *data;
301 int fill; /* Number used in this link */
302 };
303
304 struct llist {
305 struct llink *h,*t;
306 int multip; /* # of copies in a single chain */
307 int ssize; /* size of each small element */
308 int count; /* number of elements on the list */
309 };
310
311
312 /* Links */
313
314 struct llink *llink_new( struct llink* p,int size );
315 int llist_llink_push( struct llist *lst, struct llink *lnk, void *data );
316
317 /* Lists */
318
319 struct llist *llist_new( int multip, int ssize );
320 void llist_destroy( struct llist *l );
321 void llist_push( struct llist *l, void *data );
322 void llist_dump( struct llist *l );
323 int llist_pop( struct llist *l,void *data );
324
325
326
327
328 /* Octtree */
329
330 struct octt {
331 struct octt *t[8];
332 int cnt;
333 };
334
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335 struct octt *octt_new(void);
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336 int octt_add(struct octt *ct,unsigned char r,unsigned char g,unsigned char b);
337 void octt_dump(struct octt *ct);
338 void octt_count(struct octt *ct,int *tot,int max,int *overflow);
339 void octt_delete(struct octt *ct);
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340 void octt_histo(struct octt *ct, unsigned int **col_usage_it_adr);
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341
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342 /* font bounding box results */
343 enum bounding_box_index_t {
344 BBOX_NEG_WIDTH,
345 BBOX_GLOBAL_DESCENT,
346 BBOX_POS_WIDTH,
347 BBOX_GLOBAL_ASCENT,
348 BBOX_DESCENT,
349 BBOX_ASCENT,
350 BBOX_ADVANCE_WIDTH,
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351 BBOX_RIGHT_BEARING,
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352 BOUNDING_BOX_COUNT
353 };
354
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355 /* Generic fills */
356 struct i_fill_tag;
357
358 typedef void (*i_fill_with_color_f)
359 (struct i_fill_tag *fill, int x, int y, int width, int channels,
360 i_color *data);
361 typedef void (*i_fill_with_fcolor_f)
362 (struct i_fill_tag *fill, int x, int y, int width, int channels,
363 i_fcolor *data);
364 typedef void (*i_fill_destroy_f)(struct i_fill_tag *fill);
365 typedef void (*i_fill_combine_f)(i_color *out, i_color *in, int channels,
366 int count);
367 typedef void (*i_fill_combinef_f)(i_fcolor *out, i_fcolor *in, int channels,
368 int count);
369
370 /* fountain fill types */
371 typedef enum {
372 i_fst_linear,
373 i_fst_curved,
374 i_fst_sine,
375 i_fst_sphere_up,
376 i_fst_sphere_down,
377 i_fst_end
378 } i_fountain_seg_type;
379 typedef enum {
380 i_fc_direct,
381 i_fc_hue_up,
382 i_fc_hue_down,
383 i_fc_end
384 } i_fountain_color;
385 typedef struct {
386 double start, middle, end;
387 i_fcolor c[2];
388 i_fountain_seg_type type;
389 i_fountain_color color;
390 } i_fountain_seg;
391 typedef enum {
392 i_fr_none,
393 i_fr_sawtooth,
394 i_fr_triangle,
395 i_fr_saw_both,
396 i_fr_tri_both
397 } i_fountain_repeat;
398 typedef enum {
399 i_ft_linear,
400 i_ft_bilinear,
401 i_ft_radial,
402 i_ft_radial_square,
403 i_ft_revolution,
404 i_ft_conical,
405 i_ft_end
406 } i_fountain_type;
407 typedef enum {
408 i_fts_none,
409 i_fts_grid,
410 i_fts_random,
411 i_fts_circle
412 } i_ft_supersample;
413
414
415 typedef struct i_fill_tag
416 {
417 /* called for 8-bit/sample image (and maybe lower) */
418 /* this may be NULL, if so call fill_with_fcolor */
419 i_fill_with_color_f fill_with_color;
420
421 /* called for other sample sizes */
422 /* this must be non-NULL */
423 i_fill_with_fcolor_f fill_with_fcolor;
424
425 /* called if non-NULL to release any extra resources */
426 i_fill_destroy_f destroy;
427
428 /* if non-zero the caller will fill data with the original data
429 from the image */
430 i_fill_combine_f combine;
431 i_fill_combinef_f combinef;
432 } i_fill_t;
433
434 typedef enum {
435 ic_none,
436 ic_normal,
437 ic_multiply,
438 ic_dissolve,
439 ic_add,
440 ic_subtract,
441 ic_diff,
442 ic_lighten,
443 ic_darken,
444 ic_hue,
445 ic_sat,
446 ic_value,
447 ic_color
448 } i_combine_t;
449
450 /*
451 describes an axis of a MM font.
452 Modelled on FT2's FT_MM_Axis.
453 It would be nice to have a default entry too, but FT2
454 doesn't support it.
455 */
456 typedef struct i_font_mm_axis_tag {
457 char const *name;
458 int minimum;
459 int maximum;
460 } i_font_mm_axis;
461
462 #define IM_FONT_MM_MAX_AXES 4
463
464 /*
465 multiple master information for a font, if any
466 modelled on FT2's FT_Multi_Master.
467 */
468 typedef struct i_font_mm_tag {
469 int num_axis;
470 int num_designs; /* provided but not necessarily useful */
471 i_font_mm_axis axis[IM_FONT_MM_MAX_AXES];
472 } i_font_mm;
473
474 #ifdef HAVE_LIBTT
475
476 struct TT_Fonthandle_;
477
478 typedef struct TT_Fonthandle_ TT_Fonthandle;
479
480 #endif
481
482 #ifdef HAVE_FT2
483
484 typedef struct FT2_Fonthandle FT2_Fonthandle;
485
486 #endif
487
488 /* transparency handling for quantized output */
489 typedef enum i_transp_tag {
490 tr_none, /* ignore any alpha channel */
491 tr_threshold, /* threshold the transparency - uses tr_threshold */
492 tr_errdiff, /* error diffusion */
493 tr_ordered /* an ordered dither */
494 } i_transp;
495
496 /* controls how we build the colour map */
497 typedef enum i_make_colors_tag {
498 mc_none, /* user supplied colour map only */
499 mc_web_map, /* Use the 216 colour web colour map */
500 mc_addi, /* Addi's algorithm */
501 mc_median_cut, /* median cut - similar to giflib, hopefully */
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502 mc_mono, /* fixed mono color map */
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503 mc_mask = 0xFF /* (mask for generator) */
504 } i_make_colors;
505
506 /* controls how we translate the colours */
507 typedef enum i_translate_tag {
508 pt_giflib, /* get gif lib to do it (ignores make_colours) */
509 pt_closest, /* just use the closest match within the hashbox */
510 pt_perturb, /* randomly perturb the data - uses perturb_size*/
511 pt_errdiff /* error diffusion dither - uses errdiff */
512 } i_translate;
513
514 /* Which error diffusion map to use */
515 typedef enum i_errdiff_tag {
516 ed_floyd, /* floyd-steinberg */
517 ed_jarvis, /* Jarvis, Judice and Ninke */
518 ed_stucki, /* Stucki */
519 ed_custom, /* the map found in ed_map|width|height|orig */
520 ed_mask = 0xFF, /* mask to get the map */
521 ed_bidir = 0x100 /* change direction for each row */
522 } i_errdiff;
523
524 /* which ordered dither map to use
525 currently only available for transparency
526 I don't know of a way to do ordered dither of an image against some
527 general palette
528 */
529 typedef enum i_ord_dith_tag
530 {
531 od_random, /* sort of random */
532 od_dot8, /* large dot */
533 od_dot4,
534 od_hline,
535 od_vline,
536 od_slashline, /* / line dither */
537 od_backline, /* \ line dither */
538 od_tiny, /* small checkerbox */
539 od_custom /* custom 8x8 map */
540 } i_ord_dith;
541
542 typedef struct i_gif_pos_tag {
543 int x, y;
544 } i_gif_pos;
545
546 /* passed into i_writegif_gen() to control quantization */
547 typedef struct i_quantize_tag {
548 /* how to handle transparency */
549 i_transp transp;
550 /* the threshold at which to make pixels opaque */
551 int tr_threshold;
552 i_errdiff tr_errdiff;
553 i_ord_dith tr_orddith;
554 unsigned char tr_custom[64];
555
556 /* how to make the colour map */
557 i_make_colors make_colors;
558
559 /* any existing colours
560 mc_existing is an existing colour table
561 mc_count is the number of existing colours
562 mc_size is the total size of the array that mc_existing points
563 at - this must be at least 256
564 */
565 i_color *mc_colors;
566 int mc_size;
567 int mc_count;
568
569 /* how we translate the colours */
570 i_translate translate;
571
572 /* the error diffusion map to use if translate is mc_errdiff */
573 i_errdiff errdiff;
574 /* the following define the error diffusion values to use if
575 errdiff is ed_custom. ed_orig is the column on the top row that
576 represents the current
577 */
578 int *ed_map;
579 int ed_width, ed_height, ed_orig;
580
581 /* the amount of perturbation to use for translate is mc_perturb */
582 int perturb;
583 } i_quantize;
584
585 typedef struct i_gif_opts {
586 /* each image has a local color map */
587 int each_palette;
588
589 /* images are interlaced */
590 int interlace;
591
592 /* time for which image is displayed
593 (in 1/100 seconds)
594 default: 0
595 */
596 int delay_count;
597 int *delays;
598
599 /* user input flags
600 default: 0
601 */
602 int user_input_count;
603 char *user_input_flags;
604
605 /* disposal
606 default: 0 */
607 int disposal_count;
608 char *disposal;
609
610 /* this is added to the color table when we make an image transparent */
611 i_color tran_color;
612
613 /* image positions */
614 int position_count;
615 i_gif_pos *positions;
616
617 /* Netscape loop extension - number of loops */
618 int loop_count;
619
620 /* should be eliminate unused colors? */
621 int eliminate_unused;
622 } i_gif_opts;
623
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624 /* distance measures used by some filters */
625 enum {
626 i_dmeasure_euclidean = 0,
627 i_dmeasure_euclidean_squared = 1,
628 i_dmeasure_manhatten = 2,
629 i_dmeasure_limit = 2,
630 };
92bda63 - start of external Imager API access:
Tony Cook authored Jan 10, 2006
631
0778adb More iolayers work:
Tony Cook authored Mar 22, 2006
632 #include "iolayert.h"
92bda63 - start of external Imager API access:
Tony Cook authored Jan 10, 2006
633
9c10632 Various changes:
Tony Cook authored Dec 30, 2006
634 #include "rendert.h"
635
02d1d62 Initial revision
Arnar Mar Hrafnkelsson authored Mar 25, 2001
636 #endif
637
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