gimpdrawable.c 16.2 KB
Newer Older
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
/* The GIMP -- an image manipulation program
 * Copyright (C) 1995 Spencer Kimball and Peter Mattis
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 */

19
20
21
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
22
#include <string.h>
23
24
25
26
#include "gimpdrawableP.h"
#include "gimpsignal.h"
#include "gimage.h"
#include "gimage_mask.h"
Manish Singh's avatar
Manish Singh committed
27
#include "gimpparasite.h"
28
#include "parasitelist.h"
29

30
#include "libgimp/parasite.h"
31
#include "libgimp/gimpintl.h"
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113

enum {
  INVALIDATE_PREVIEW,
  LAST_SIGNAL
};


static void gimp_drawable_class_init (GimpDrawableClass *klass);
static void gimp_drawable_init	     (GimpDrawable      *drawable);
static void gimp_drawable_destroy    (GtkObject		*object);

static guint gimp_drawable_signals[LAST_SIGNAL] = { 0 };

static GimpDrawableClass *parent_class = NULL;


GtkType
gimp_drawable_get_type ()
{
  static GtkType type;
  GIMP_TYPE_INIT(type,
		 GimpDrawable,
		 GimpDrawableClass,
		 gimp_drawable_init,
		 gimp_drawable_class_init,
		 GIMP_TYPE_OBJECT);
  return type;
}

static void
gimp_drawable_class_init (GimpDrawableClass *class)
{
  GtkObjectClass *object_class;
  GtkType type=GIMP_TYPE_DRAWABLE;
  object_class = GTK_OBJECT_CLASS(class);
  parent_class = gtk_type_class (GIMP_TYPE_OBJECT);
  
  gimp_drawable_signals[INVALIDATE_PREVIEW] =
	  gimp_signal_new ("invalidate_pr", GTK_RUN_LAST, type,
			   GTK_SIGNAL_OFFSET(GimpDrawableClass,
					     invalidate_preview),
			   gimp_sigtype_void);

  gtk_object_class_add_signals (object_class, gimp_drawable_signals, LAST_SIGNAL);

  object_class->destroy = gimp_drawable_destroy;
}


/*
 *  Static variables
 */
int global_drawable_ID = 1;
static GHashTable *gimp_drawable_table = NULL;

/**************************/
/*  Function definitions  */

GimpDrawable*
gimp_drawable_get_ID (int drawable_id)
{
  if (gimp_drawable_table == NULL)
    return NULL;

  return (GimpDrawable*) g_hash_table_lookup (gimp_drawable_table, 
					      (gpointer) drawable_id);
}


void
gimp_drawable_merge_shadow (GimpDrawable *drawable, int undo)
{
  GImage *gimage;
  PixelRegion shadowPR;
  int x1, y1, x2, y2;

  if (! drawable) 
    return;

  if (! (gimage = gimp_drawable_gimage (drawable)))
    return;

114
115
116
  if (! gimage->shadow)
    return;

117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
  /*  A useful optimization here is to limit the update to the
   *  extents of the selection mask, as it cannot extend beyond
   *  them.
   */
  gimp_drawable_mask_bounds (drawable, &x1, &y1, &x2, &y2);
  pixel_region_init (&shadowPR, gimage->shadow, x1, y1,
		     (x2 - x1), (y2 - y1), FALSE);
  gimage_apply_image (gimage, drawable, &shadowPR, undo, OPAQUE_OPACITY,
		      REPLACE_MODE, NULL, x1, y1);
}


void
gimp_drawable_fill (GimpDrawable *drawable, guchar r, guchar g,
		    guchar b, guchar a)
{
  GImage *gimage;
  PixelRegion destPR;
  guchar c[MAX_CHANNELS];
  guchar i;
  

  g_assert(GIMP_IS_DRAWABLE(drawable));
  gimage=gimp_drawable_gimage(drawable);
  g_assert(gimage);

  switch (gimp_drawable_type (drawable))
    {
    case RGB_GIMAGE: case RGBA_GIMAGE:
      c[RED_PIX] = r;
      c[GREEN_PIX] = g;
      c[BLUE_PIX] = b;
      if (gimp_drawable_type (drawable) == RGBA_GIMAGE)
	c[ALPHA_PIX] = a;
      break;
    case GRAY_GIMAGE: case GRAYA_GIMAGE:
      c[GRAY_PIX] = r;
      if (gimp_drawable_type (drawable) == GRAYA_GIMAGE)
	c[ALPHA_G_PIX] = a;
      break;
    case INDEXED_GIMAGE: case INDEXEDA_GIMAGE:
      c[RED_PIX] = r;
      c[GREEN_PIX] = g;
      c[BLUE_PIX] = b;
      gimage_transform_color (gimage, drawable, c, &i, RGB);
      c[INDEXED_PIX] = i;
      if (gimp_drawable_type (drawable) == INDEXEDA_GIMAGE)
	  c[ALPHA_I_PIX] = a;
      break;
    default:
167
      g_message (_("Can't fill unknown image type."));
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
      break;
    }

  pixel_region_init (&destPR,
		     gimp_drawable_data (drawable),
		     0, 0,
		     gimp_drawable_width (drawable),
		     gimp_drawable_height (drawable),
		     TRUE);
  color_region (&destPR, c);

}


int
gimp_drawable_mask_bounds (GimpDrawable *drawable, 
		      int *x1, int *y1, int *x2, int *y2)
{
  GImage *gimage;
  int off_x, off_y;

  if (! drawable)
    return FALSE;

  if (! (gimage = gimp_drawable_gimage (drawable)))
    return FALSE;

  if (gimage_mask_bounds (gimage, x1, y1, x2, y2))
    {
      gimp_drawable_offsets (drawable, &off_x, &off_y);
      *x1 = CLAMP (*x1 - off_x, 0, gimp_drawable_width (drawable));
      *y1 = CLAMP (*y1 - off_y, 0, gimp_drawable_height (drawable));
      *x2 = CLAMP (*x2 - off_x, 0, gimp_drawable_width (drawable));
      *y2 = CLAMP (*y2 - off_y, 0, gimp_drawable_height (drawable));
      return TRUE;
    }
  else
    {
      *x2 = gimp_drawable_width (drawable);
      *y2 = gimp_drawable_height (drawable);
      return FALSE;
    }
}


void
gimp_drawable_invalidate_preview (GimpDrawable *drawable)
{
  GImage *gimage;

  if (! drawable)
    return;

  drawable->preview_valid = FALSE;
#if 0
  gtk_signal_emit (GTK_OBJECT(drawable), gimp_drawable_signals[INVALIDATE_PREVIEW]);
#endif
  gimage = gimp_drawable_gimage (drawable);
  if (gimage)
    {
      gimage->comp_preview_valid[0] = FALSE;
      gimage->comp_preview_valid[1] = FALSE;
      gimage->comp_preview_valid[2] = FALSE;
    }
}


int
gimp_drawable_dirty (GimpDrawable *drawable)
{
  if (drawable) 
    return drawable->dirty = (drawable->dirty < 0) ? 2 : drawable->dirty + 1;
  else
    return 0;
}


int
gimp_drawable_clean (GimpDrawable *drawable)
{
  if (drawable) 
    return drawable->dirty = (drawable->dirty <= 0) ? 0 : drawable->dirty - 1;
  else
    return 0;
}


GimpImage *
gimp_drawable_gimage (GimpDrawable *drawable)
{
  g_assert(GIMP_IS_DRAWABLE(drawable));
	
  return drawable->gimage;
}


264
265
266
267
268
269
void
gimp_drawable_set_gimage (GimpDrawable *drawable, GimpImage *gimage)
{
  g_assert(GIMP_IS_DRAWABLE(drawable));
  if (gimage == NULL)
    drawable->tattoo = 0;
270
  else if (drawable->tattoo == 0 || drawable->gimage != gimage )
271
    drawable->tattoo = gimp_image_get_new_tattoo(gimage);
272
  drawable->gimage = gimage;
273
274
275
}


276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
int
gimp_drawable_type (GimpDrawable *drawable)
{
  if (drawable)
    return drawable->type;
  else
    return -1;
}

int
gimp_drawable_has_alpha (GimpDrawable *drawable)
{
  if (drawable)
    return drawable->has_alpha;
  else
    return FALSE;
}


int 
gimp_drawable_visible (GimpDrawable *drawable)
{
  return drawable->visible;
}

char *
302
gimp_drawable_get_name (GimpDrawable *drawable)
303
304
305
306
{
  return drawable->name;
}

307
308
309
310
311
312
313
314
void
gimp_drawable_set_name (GimpDrawable *drawable, char *name)
{
  GSList *list, *listb, *base_list;
  GimpDrawable *drawableb;
  int number = 1;
  char *newname;
  char *ext;
315
  char numberbuf[20];
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346

  g_return_if_fail(GIMP_IS_DRAWABLE(drawable));
  if (drawable->name)
    g_free(drawable->name);
  drawable->name = NULL;
  if (drawable->gimage == 0 || drawable->gimage->layers == 0)
  {
    /* no other layers to check name against */
    drawable->name = g_strdup(name);
    return;
  }
  if (GIMP_IS_LAYER(drawable))
    base_list = drawable->gimage->layers;
  else if (GIMP_IS_CHANNEL(drawable))
    base_list = drawable->gimage->channels;
  else
    base_list = NULL;

  list = base_list;
  while (list)
  {
    drawableb = GIMP_DRAWABLE(list->data);
    if (drawable != drawableb &&
	strcmp(name, gimp_drawable_get_name(drawableb)) == 0)
    { /* names conflict */
      newname = g_malloc(strlen(name)+10); /* if this aint enough 
						 yer screwed */
      strcpy (newname, name);
      if ((ext = strrchr(newname, '#')))
      {
	number = atoi(ext+1);
347
348
349
	/* Check if there really was the number we think after the # */
	sprintf (numberbuf, "#%d", number);
	if (strcmp (ext, numberbuf) != 0)
350
	{
351
	  /* No, so just ignore the # */
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
	  number = 1;
	  ext = &newname[strlen(newname)];
	}
      }
      else
      {
	number = 1;
	ext = &newname[strlen(newname)];
      }
      sprintf(ext, "#%d", number+1);
      listb = base_list;
      while (listb) /* make sure the new name is unique */
      {
	drawableb = GIMP_DRAWABLE(listb->data);
	if (drawable != drawableb && strcmp(newname,
				      gimp_drawable_get_name(drawableb)) == 0)
	{
	  number++;
	  sprintf(ext, "#%d", number+1);
371
	  /* Rescan from beginning */
372
	  listb = base_list;
373
	  continue;
374
375
376
377
378
379
380
381
382
383
384
385
	}
	listb = listb->next;
      }
      drawable->name = g_strdup(newname);
      g_free(newname);
      return;
    }
    list = list->next;
  }
  drawable->name = g_strdup(name);
}

386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
unsigned char *
gimp_drawable_get_color_at (GimpDrawable *drawable, int x, int y)
{
  Tile *tile;
  unsigned char *src;
  unsigned char *dest;

  if (!drawable ||
      (!gimp_drawable_gimage(drawable) && gimp_drawable_indexed(drawable)) 
      || x < 0 || y < 0 ||
      x >= drawable->width || y >= drawable->height)
  {
    return NULL;
  }
  dest = g_new(unsigned char, 5);
  tile = tile_manager_get_tile (gimp_drawable_data (drawable), x, y,
				TRUE, FALSE);
  src = tile_data_pointer (tile, x % TILE_WIDTH, y % TILE_HEIGHT);
  gimp_image_get_color (gimp_drawable_gimage(drawable),
			gimp_drawable_type (drawable), dest, src);
  if(TYPE_HAS_ALPHA(gimp_drawable_type (drawable)))
    dest[3] = src[gimp_drawable_bytes (drawable) - 1];
  else
    dest[3] = 255;
  if (gimp_drawable_indexed(drawable))
    dest[4] = src[0];
  else
    dest[4] = 0;
  tile_release (tile, FALSE);
  return dest;
}


419
420

Parasite *
421
gimp_drawable_find_parasite (const GimpDrawable *drawable, const char *name)
422
{
423
  return parasite_list_find(drawable->parasites, name);
424
425
}

Marc Lehmann's avatar
Marc Lehmann committed
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
static void list_func(char *key, Parasite *p, char ***cur)
{
  *(*cur)++ = (char *) g_strdup (key);
}

char **
gimp_drawable_parasite_list (GimpDrawable *drawable, gint *count)
{
  char **list, **cur;

  *count = parasite_list_length (drawable->parasites);
  cur = list = (char **) g_malloc (sizeof (char *) * *count);

  parasite_list_foreach (drawable->parasites, (GHFunc)list_func, &cur);
  
  return list;
}

444
void
445
gimp_drawable_attach_parasite (GimpDrawable *drawable, Parasite *parasite)
446
{
447
448
449
450
451
  /* only set the dirty bit if we can be saved and the new parasite differs 
     from the current one */
  if (parasite_is_persistent(parasite) &&
      !parasite_compare(parasite, gimp_drawable_find_parasite(drawable,
						parasite_name(parasite))))
452
    gimp_image_dirty(drawable->gimage);
453
  parasite_list_add(drawable->parasites, parasite);
454
455
456
457
458
459
460
461
462
463
464
  if (parasite_has_flag(parasite, PARASITE_ATTACH_PARENT))
  {
    parasite_shift_parent(parasite);
    gimp_image_attach_parasite(drawable->gimage, parasite);
  }
  else if (parasite_has_flag(parasite, PARASITE_ATTACH_GRANDPARENT))
  {
    parasite_shift_parent(parasite);
    parasite_shift_parent(parasite);
    gimp_attach_parasite(parasite);
  }
465
466
467
}

void
468
gimp_drawable_detach_parasite (GimpDrawable *drawable, const char *parasite)
469
{
470
471
472
473
474
  Parasite *p;
  if (!(p = parasite_list_find(drawable->parasites, parasite)))
    return;
  if (parasite_is_persistent(p))
    gimp_image_dirty(drawable->gimage);
475
  parasite_list_remove(drawable->parasites, parasite);
476
477
}

478
Tattoo
479
480
481
482
gimp_drawable_get_tattoo(const GimpDrawable *drawable)
{
  return drawable->tattoo;
}
483

484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
int
gimp_drawable_type_with_alpha (GimpDrawable *drawable)
{
  int type = gimp_drawable_type (drawable);
  int has_alpha = gimp_drawable_has_alpha (drawable);

  if (has_alpha)
    return type;
  else
    switch (type)
      {
      case RGB_GIMAGE:
	return RGBA_GIMAGE; break;
      case GRAY_GIMAGE:
	return GRAYA_GIMAGE; break;
      case INDEXED_GIMAGE:
	return INDEXEDA_GIMAGE; break;
      }
  return 0;
}


int
gimp_drawable_color (GimpDrawable *drawable)
{
  if (gimp_drawable_type (drawable) == RGBA_GIMAGE ||
      gimp_drawable_type (drawable) == RGB_GIMAGE)
    return 1;
  else
    return 0;
}


int
gimp_drawable_gray (GimpDrawable *drawable)
{
  if (gimp_drawable_type (drawable) == GRAYA_GIMAGE ||
      gimp_drawable_type (drawable) == GRAY_GIMAGE)
    return 1;
  else
    return 0;
}


int
gimp_drawable_indexed (GimpDrawable *drawable)
{
  if (gimp_drawable_type (drawable) == INDEXEDA_GIMAGE ||
      gimp_drawable_type (drawable) == INDEXED_GIMAGE)
    return 1;
  else
    return 0;
}


TileManager *
gimp_drawable_data (GimpDrawable *drawable)
{
  if (drawable) 
    return drawable->tiles;
  else
    return NULL;
}


TileManager *
gimp_drawable_shadow (GimpDrawable *drawable)
{
  GImage *gimage;

  if (! (gimage = gimp_drawable_gimage (drawable)))
    return NULL;

  if (drawable) 
    return gimage_shadow (gimage, drawable->width, drawable->height, 
			  drawable->bytes);
  else
    return NULL;
}


int
gimp_drawable_bytes (GimpDrawable *drawable)
{
  if (drawable) 
    return drawable->bytes;
  else
    return -1;
}


int
gimp_drawable_width (GimpDrawable *drawable)
{
  if (drawable) 
    return drawable->width;
  else
    return -1;
}


int
gimp_drawable_height (GimpDrawable *drawable)
{
  if (drawable) 
    return drawable->height;
  else
    return -1;
}


void
gimp_drawable_offsets (GimpDrawable *drawable, int *off_x, int *off_y)
{
  if (drawable) 
    {
      *off_x = drawable->offset_x;
      *off_y = drawable->offset_y;
    }
  else
    *off_x = *off_y = 0;
}

unsigned char *
gimp_drawable_cmap (GimpDrawable *drawable)
{
  GImage *gimage;

  if ((gimage = gimp_drawable_gimage (drawable)))
    return gimage->cmap;
  else
    return NULL;
}


void
gimp_drawable_deallocate (GimpDrawable *drawable)
{
  if (drawable->tiles)
    tile_manager_destroy (drawable->tiles);
}

static void
gimp_drawable_init (GimpDrawable *drawable)
{
  drawable->name = NULL;
  drawable->tiles = NULL;
  drawable->visible = FALSE;
  drawable->width = drawable->height = 0;
  drawable->offset_x = drawable->offset_y = 0;
  drawable->bytes = 0;
  drawable->dirty = FALSE;
  drawable->gimage = NULL;
  drawable->type = -1;
  drawable->has_alpha = FALSE;
  drawable->preview = NULL;
  drawable->preview_valid = FALSE;
641
  drawable->parasites = parasite_list_new();
642
  drawable->tattoo = 0;
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670

  drawable->ID = global_drawable_ID++;
  if (gimp_drawable_table == NULL)
    gimp_drawable_table = g_hash_table_new (g_direct_hash, NULL);
  g_hash_table_insert (gimp_drawable_table, (gpointer) drawable->ID,
		       (gpointer) drawable);
}

static void
gimp_drawable_destroy (GtkObject *object)
{
  GimpDrawable *drawable;
  g_return_if_fail (object != NULL);
  g_return_if_fail (GIMP_IS_DRAWABLE (object));

  drawable = GIMP_DRAWABLE (object);

  g_hash_table_remove (gimp_drawable_table, (gpointer) drawable->ID);
  
  if (drawable->name)
    g_free (drawable->name);

  if (drawable->tiles)
    tile_manager_destroy (drawable->tiles);

  if (drawable->preview)
    temp_buf_free (drawable->preview);

671
  if (drawable->parasites)
672
    gtk_object_unref(GTK_OBJECT(drawable->parasites));
673

674
675
676
677
678
679
680
681
682
683
684
685
686
  if (GTK_OBJECT_CLASS (parent_class)->destroy)
    (*GTK_OBJECT_CLASS (parent_class)->destroy) (object);
}

void
gimp_drawable_configure (GimpDrawable *drawable,
			 GimpImage* gimage, int width, int height, 
			 int type, char *name)
{
  int bpp;
  int alpha;

  if (!name)
687
    name = _("unnamed");
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703

  switch (type)
    {
    case RGB_GIMAGE:
      bpp = 3; alpha = 0; break;
    case GRAY_GIMAGE:
      bpp = 1; alpha = 0; break;
    case RGBA_GIMAGE:
      bpp = 4; alpha = 1; break;
    case GRAYA_GIMAGE:
      bpp = 2; alpha = 1; break;
    case INDEXED_GIMAGE:
      bpp = 1; alpha = 0; break;
    case INDEXEDA_GIMAGE:
      bpp = 2; alpha = 1; break;
    default:
704
      g_message (_("Layer type %d not supported."), type);
705
706
707
      return;
    }

708
  drawable->name = NULL;
709
710
711
712
713
714
715
716
717
718
719
720
721
722
  drawable->width = width;
  drawable->height = height;
  drawable->bytes = bpp;
  drawable->type = type;
  drawable->has_alpha = alpha;
  drawable->offset_x = 0;
  drawable->offset_y = 0;

  if (drawable->tiles)
    tile_manager_destroy (drawable->tiles);
  drawable->tiles = tile_manager_new (width, height, bpp);
  drawable->dirty = FALSE;
  drawable->visible = TRUE;

723
724
  if (gimage)
    gimp_drawable_set_gimage(drawable, gimage);
725

726
727
  gimp_drawable_set_name(drawable, name);

728
729
730
731
732
  /*  preview variables  */
  drawable->preview = NULL;
  drawable->preview_valid = FALSE;
}