gimpimage-resize.c 99.5 KB
Newer Older
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17
/* 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.
 */
18 19
#include "config.h"

20
#include <string.h>
21

22
#include "gimpimageP.h"
23
#include "cursorutil.h"
24 25
#include "drawable.h"
#include "floating_sel.h"
26
#include "gdisplay.h"
27
#include "gimage_mask.h"
28
#include "gimpcontext.h"
29
#include "paint_funcs.h"
30
#include "parasitelist.h"
31 32
#include "undo.h"
#include "gimpsignal.h"
Manish Singh's avatar
Manish Singh committed
33
#include "gimpparasite.h"
34
#include "path.h"
35
#include "gimprc.h"
36

scott's avatar
scott committed
37 38
#include "tile_manager.h"
#include "tile.h"
39 40 41
#include "layer_pvt.h"
#include "drawable_pvt.h"		/* ick ick. */

42 43
#include "libgimp/gimpcolorspace.h"
#include "libgimp/gimplimits.h"
44
#include "libgimp/gimpparasite.h"
45 46 47

#include "libgimp/gimpintl.h"

48

49 50 51 52 53 54 55
#ifdef DEBUG
#define TRC(x) printf x
#else
#define TRC(x)
#endif


56
/*  Local function declarations  */
57
static void     gimp_image_destroy               (GtkObject *object);
58
static void     gimp_image_free_projection       (GimpImage *);
59
static void     gimp_image_allocate_shadow       (GimpImage *, gint, gint, gint);
60 61 62
static void     gimp_image_allocate_projection   (GimpImage *);
static void     gimp_image_free_layers           (GimpImage *);
static void     gimp_image_free_channels         (GimpImage *);
63 64 65 66
static void     gimp_image_construct_layers      (GimpImage *, gint, gint, gint, gint);
static void     gimp_image_construct_channels    (GimpImage *, gint, gint, gint, gint);
static void     gimp_image_initialize_projection (GimpImage *, gint, gint, gint, gint);
static void     gimp_image_get_active_channels   (GimpImage *, GimpDrawable *, gint *);
67 68

/*  projection functions  */
69 70
static void     project_intensity            (GimpImage *, Layer *,
					      PixelRegion *, PixelRegion *,
71
					      PixelRegion *);
72 73
static void     project_intensity_alpha      (GimpImage *, Layer *,
					      PixelRegion *, PixelRegion *,
74
					      PixelRegion *);
75 76 77 78
static void     project_indexed              (GimpImage *, Layer *,
					      PixelRegion *, PixelRegion *);
static void     project_channel              (GimpImage *, Channel *,
					      PixelRegion *, PixelRegion *);
79 80 81 82

/*
 *  Global variables
 */
83
gint valid_combinations[][MAX_CHANNELS + 1] =
84 85 86 87 88 89 90 91 92 93 94 95 96 97 98
{
  /* RGB GIMAGE */
  { -1, -1, -1, COMBINE_INTEN_INTEN, COMBINE_INTEN_INTEN_A },
  /* RGBA GIMAGE */
  { -1, -1, -1, COMBINE_INTEN_A_INTEN, COMBINE_INTEN_A_INTEN_A },
  /* GRAY GIMAGE */
  { -1, COMBINE_INTEN_INTEN, COMBINE_INTEN_INTEN_A, -1, -1 },
  /* GRAYA GIMAGE */
  { -1, COMBINE_INTEN_A_INTEN, COMBINE_INTEN_A_INTEN_A, -1, -1 },
  /* INDEXED GIMAGE */
  { -1, COMBINE_INDEXED_INDEXED, COMBINE_INDEXED_INDEXED_A, -1, -1 },
  /* INDEXEDA GIMAGE */
  { -1, -1, COMBINE_INDEXED_A_INDEXED_A, -1, -1 },
};

99
guint32 next_guide_id = 1;  /* For generating guide_ID handles for PDB stuff */
100

101 102 103 104 105

/*
 *  Static variables
 */

106
enum {
107
  CLEAN,
108 109 110 111 112
  DIRTY,
  REPAINT,
  RENAME,
  RESIZE,
  RESTRUCTURE,
113
  COLORMAP_CHANGED,
114
  UNDO_EVENT,
115 116
  LAST_SIGNAL
};
117

118
static guint            gimp_image_signals[LAST_SIGNAL];
119
static GimpObjectClass *parent_class;
120

121

122 123 124 125
static void
gimp_image_class_init (GimpImageClass *klass)
{
  GtkObjectClass *object_class;
126
  GtkType         type;
127 128 129 130 131 132 133 134
  
  object_class = GTK_OBJECT_CLASS(klass);
  parent_class = gtk_type_class (gimp_object_get_type ());
  
  type=object_class->type;

  object_class->destroy =  gimp_image_destroy;

135 136 137
  gimp_image_signals[CLEAN] =
	  gimp_signal_new ("clean", GTK_RUN_FIRST, type, 0,
			   gimp_sigtype_void);
138
  gimp_image_signals[DIRTY] =
139 140
	  gimp_signal_new ("dirty", GTK_RUN_FIRST, type, 0,
			   gimp_sigtype_void);
141
  gimp_image_signals[REPAINT] =
142 143
	  gimp_signal_new ("repaint", GTK_RUN_FIRST, type, 0,
			   gimp_sigtype_int_int_int_int);
144
  gimp_image_signals[RENAME] =
145 146
	  gimp_signal_new ("rename", GTK_RUN_FIRST, type, 0,
			   gimp_sigtype_void);
147
  gimp_image_signals[RESIZE] =
148 149
	  gimp_signal_new ("resize", GTK_RUN_FIRST, type, 0,
			   gimp_sigtype_void);
150
  gimp_image_signals[RESTRUCTURE] =
151 152
	  gimp_signal_new ("restructure", GTK_RUN_FIRST, type, 0,
			   gimp_sigtype_void);
153
  gimp_image_signals[COLORMAP_CHANGED] =
154 155
	  gimp_signal_new ("colormap_changed", GTK_RUN_FIRST, type, 0,
			   gimp_sigtype_int);
156 157 158
  gimp_image_signals[UNDO_EVENT] = 
	  gimp_signal_new ("undo_event", GTK_RUN_FIRST, type, 0,
			   gimp_sigtype_int);
159 160 161 162 163 164 165
  
  gtk_object_class_add_signals (object_class, gimp_image_signals, LAST_SIGNAL);
}


/* static functions */

Sven Neumann's avatar
Sven Neumann committed
166 167
static void 
gimp_image_init (GimpImage *gimage)
168
{
169 170 171
  gimage->has_filename          = FALSE;
  gimage->num_cols              = 0;
  gimage->cmap                  = NULL;
172
  gimage->disp_count            = 0;
173 174
  gimage->instance_count        = 0;
  gimage->shadow                = NULL;
175
  gimage->dirty                 = 1;
176 177 178 179 180 181 182 183 184 185 186 187
  gimage->undo_on               = TRUE;
  gimage->construct_flag        = -1;
  gimage->tattoo_state          = 0;
  gimage->projection            = NULL;
  gimage->guides                = NULL;
  gimage->layers                = NULL;
  gimage->channels              = NULL;
  gimage->layer_stack           = NULL;
  gimage->undo_stack            = NULL;
  gimage->redo_stack            = NULL;
  gimage->undo_bytes            = 0;
  gimage->undo_levels           = 0;
188
  gimage->group_count           = 0;
189
  gimage->pushing_undo_group    = UNDO_NULL;
190 191 192
  gimage->comp_preview_valid[0] = FALSE;
  gimage->comp_preview_valid[1] = FALSE;
  gimage->comp_preview_valid[2] = FALSE;
193
  gimage->comp_preview          = NULL;
194
  gimage->parasites             = parasite_list_new ();
195 196 197 198 199
  gimage->xresolution           = default_xresolution;
  gimage->yresolution           = default_yresolution;
  gimage->unit                  = default_units;
  gimage->save_proc             = NULL;
  gimage->paths                 = NULL;
200 201
}

Sven Neumann's avatar
Sven Neumann committed
202 203 204 205 206
GtkType 
gimp_image_get_type (void) 
{
  static GtkType type;

207 208 209 210 211 212
  GIMP_TYPE_INIT (type,
		  GimpImage,
		  GimpImageClass,
		  gimp_image_init,
		  gimp_image_class_init,
		  GIMP_TYPE_OBJECT);
Sven Neumann's avatar
Sven Neumann committed
213
  return type;
214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237
}

static void
gimp_image_allocate_projection (GimpImage *gimage)
{
  if (gimage->projection)
    gimp_image_free_projection (gimage);

  /*  Find the number of bytes required for the projection.
   *  This includes the intensity channels and an alpha channel
   *  if one doesn't exist.
   */
  switch (gimp_image_base_type (gimage))
    {
    case RGB:
    case INDEXED:
      gimage->proj_bytes = 4;
      gimage->proj_type = RGBA_GIMAGE;
      break;
    case GRAY:
      gimage->proj_bytes = 2;
      gimage->proj_type = GRAYA_GIMAGE;
      break;
    default:
238
      g_assert_not_reached ();
239 240 241 242
    }

  /*  allocate the new projection  */
  gimage->projection = tile_manager_new (gimage->width, gimage->height, gimage->proj_bytes);
243
  tile_manager_set_user_data (gimage->projection, (void *) gimage);
244 245 246 247 248 249 250 251 252 253 254 255 256
  tile_manager_set_validate_proc (gimage->projection, gimp_image_validate);
}

static void
gimp_image_free_projection (GimpImage *gimage)
{
  if (gimage->projection)
    tile_manager_destroy (gimage->projection);

  gimage->projection = NULL;
}

static void
Sven Neumann's avatar
Sven Neumann committed
257
gimp_image_allocate_shadow (GimpImage *gimage, 
258 259 260
			    gint       width, 
			    gint       height, 
			    gint       bpp)
261 262 263 264 265 266 267 268 269
{
  /*  allocate the new projection  */
  gimage->shadow = tile_manager_new (width, height, bpp);
}


/* function definitions */

GimpImage *
270 271 272
gimp_image_new (gint               width,
		gint               height,
		GimpImageBaseType  base_type)
273
{
274 275
  GimpImage *gimage = GIMP_IMAGE (gtk_type_new (gimp_image_get_type ()));
  gint i;
276

277 278 279
  gimage->filename  = NULL;
  gimage->width     = width;
  gimage->height    = height;
280 281 282 283 284 285 286 287 288 289
  gimage->base_type = base_type;

  switch (base_type)
    {
    case RGB:
    case GRAY:
      break;
    case INDEXED:
      /* always allocate 256 colors for the colormap */
      gimage->num_cols = 0;
290
      gimage->cmap     = (guchar *) g_malloc0 (COLORMAP_SIZE);
291 292 293 294 295 296
      break;
    default:
      break;
    }

  /*  configure the active pointers  */
297
  gimage->active_layer   = NULL;
298
  gimage->active_channel = NULL;  /* no default active channel */
299
  gimage->floating_sel   = NULL;
300 301 302 303

  /*  set all color channels visible and active  */
  for (i = 0; i < MAX_CHANNELS; i++)
    {
304 305
      gimage->visible[i] = TRUE;
      gimage->active[i]  = TRUE;
306 307 308
    }

  /* create the selection mask */
309 310
  gimage->selection_mask = channel_new_mask (gimage,
					     gimage->width, gimage->height);
311

312
  /* set the qmask properties */
313 314
  gimage->qmask_state    = FALSE;
  gimage->qmask_opacity  = 50;
315 316 317
  gimage->qmask_color[0] = 255; 
  gimage->qmask_color[1] = 0; 
  gimage->qmask_color[2] = 0; 
318 319 320 321 322

  return gimage;
}

void
323
gimp_image_set_filename (GimpImage *gimage, 
324
			 gchar     *filename)
325
{
326 327
  gchar *new_filename, *old_filename;
  gboolean free_old;
328

329 330 331 332 333 334
  /* 
   * WARNING: this function will free the current filename even if you are 
   * setting it to itself so any pointer you hold to the filename will be
   * invalid after this call.  So please use with care.
   */

335
  new_filename = g_strdup (filename);
336 337
  old_filename = gimage->filename;
  free_old = gimage->has_filename;
338 339 340 341 342 343 344 345 346 347 348 349

  if (filename && filename[0])
    {
      gimage->filename = new_filename;
      gimage->has_filename = TRUE;
    }
  else
    {
      gimage->filename = NULL;
      gimage->has_filename = FALSE;
    }

350 351 352
  if (free_old)
    g_free (old_filename);

353 354 355
  gtk_signal_emit (GTK_OBJECT (gimage), gimp_image_signals[RENAME]);
}

356
void
357
gimp_image_set_resolution (GimpImage *gimage,
358 359
			   gdouble    xresolution,
			   gdouble    yresolution)
360
{
361 362 363 364 365
  /* nothing to do if setting res to the same as before */
  if ((ABS (gimage->xresolution - xresolution) < 1e-5) &&
      (ABS (gimage->yresolution - yresolution) < 1e-5))
      return;

366 367 368
  /* don't allow to set the resolution out of bounds */
  if (xresolution < GIMP_MIN_RESOLUTION || xresolution > GIMP_MAX_RESOLUTION ||
      yresolution < GIMP_MIN_RESOLUTION || yresolution > GIMP_MAX_RESOLUTION)
369 370
    return;

371
  undo_push_resolution (gimage);
372

373 374
  gimage->xresolution = xresolution;
  gimage->yresolution = yresolution;
375 376 377

  /* really just want to recalc size and repaint */
  gdisplays_shrink_wrap (gimage);
378 379
}

380 381
void
gimp_image_get_resolution (GimpImage *gimage,
382 383
			   gdouble   *xresolution,
			   gdouble   *yresolution)
384
{
385 386
  g_return_if_fail (xresolution && yresolution);

387 388
  *xresolution = gimage->xresolution;
  *yresolution = gimage->yresolution;
389 390
}

391 392
void
gimp_image_set_unit (GimpImage *gimage,
393
		     GimpUnit   unit)
394
{
395 396
  undo_push_resolution (gimage);

397 398 399
  gimage->unit = unit;
}

400
GimpUnit
401 402 403 404 405
gimp_image_get_unit (GimpImage *gimage)
{
  return gimage->unit;
}

406
void
Sven Neumann's avatar
Sven Neumann committed
407 408
gimp_image_set_save_proc (GimpImage     *gimage, 
			  PlugInProcDef *proc)
409 410 411 412 413 414 415 416 417
{
  gimage->save_proc = proc;
}

PlugInProcDef *
gimp_image_get_save_proc (GimpImage *gimage)
{
  return gimage->save_proc;
}
418

419
void
420
gimp_image_resize (GimpImage *gimage, 
421 422 423 424
		   gint       new_width, 
		   gint       new_height,
		   gint       offset_x, 
		   gint       offset_y)
425 426
{
  Channel *channel;
427 428 429 430
  Layer   *layer;
  Layer   *floating_layer;
  GSList  *list;
  GList   *guide_list;
431

432 433
  gimp_add_busy_cursors();

434
  g_assert (new_width > 0 && new_height > 0);
435 436 437 438

  /*  Get the floating layer if one exists  */
  floating_layer = gimp_image_floating_sel (gimage);

Sven Neumann's avatar
Sven Neumann committed
439
  undo_push_group_start (gimage, IMAGE_RESIZE_UNDO);
440 441 442 443 444 445 446 447 448

  /*  Relax the floating selection  */
  if (floating_layer)
    floating_sel_relax (floating_layer, TRUE);

  /*  Push the image size to the stack  */
  undo_push_gimage_mod (gimage);

  /*  Set the new width and height  */
449
  gimage->width  = new_width;
450 451 452 453 454 455 456 457 458
  gimage->height = new_height;

  /*  Resize all channels  */
  list = gimage->channels;
  while (list)
    {
      channel = (Channel *) list->data;
      channel_resize (channel, new_width, new_height, offset_x, offset_y);
      list = g_slist_next (list);
459 460 461 462 463 464 465 466 467 468

    }

  /*  Reposition or remove any guides  */
  guide_list = gimage->guides;
  while (guide_list)
    {
      Guide *guide;

      guide = (Guide*) guide_list->data;
Sven Neumann's avatar
Sven Neumann committed
469
      guide_list = g_list_next (guide_list);
470 471 472

      switch (guide->orientation)
	{
473
	case ORIENTATION_HORIZONTAL:
Sven Neumann's avatar
Sven Neumann committed
474
	  undo_push_guide (gimage, guide);
475 476 477 478
	  guide->position += offset_y;
	  if (guide->position < 0 || guide->position > new_height)
	    gimp_image_delete_guide (gimage, guide);
	  break;
479
	case ORIENTATION_VERTICAL:
Sven Neumann's avatar
Sven Neumann committed
480
	  undo_push_guide (gimage, guide);
481 482 483 484 485 486 487
	  guide->position += offset_x;
	  if (guide->position < 0 || guide->position > new_width)
	    gimp_image_delete_guide (gimage, guide);
	  break;
	default:
	  g_error("Unknown guide orientation I.\n");
	}
488 489 490
    }

  /*  Don't forget the selection mask!  */
491 492
  channel_resize (gimage->selection_mask,
		  new_width, new_height, offset_x, offset_y);
493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511
  gimage_mask_invalidate (gimage);

  /*  Reposition all layers  */
  list = gimage->layers;
  while (list)
    {
      layer = (Layer *) list->data;
      layer_translate (layer, offset_x, offset_y);
      list = g_slist_next (list);
    }

  /*  Make sure the projection matches the gimage size  */
  gimp_image_projection_realloc (gimage);

  /*  Rigor the floating selection  */
  if (floating_layer)
    floating_sel_rigor (floating_layer, TRUE);

  gtk_signal_emit (GTK_OBJECT (gimage), gimp_image_signals[RESIZE]);
512

513
  gimp_remove_busy_cursors (NULL);
514 515
}

516 517 518 519 520 521 522 523 524 525 526 527
gint
gimp_image_get_width (const GimpImage *gimage)
{
  return gimage->width;
}

gint
gimp_image_get_height (const GimpImage *gimage)
{
  return gimage->height;
}

528
void
529
gimp_image_scale (GimpImage *gimage, 
530 531
		  gint       new_width, 
		  gint       new_height)
532 533
{
  Channel *channel;
Sven Neumann's avatar
Sven Neumann committed
534 535 536
  Layer   *layer;
  Layer   *floating_layer;
  GSList  *list;
537
  GSList  *remove = NULL;
Sven Neumann's avatar
Sven Neumann committed
538 539
  GList   *glist;
  Guide   *guide;
540 541 542 543
  gint     old_width;
  gint     old_height;
  gdouble  img_scale_w = 1.0;
  gdouble  img_scale_h = 1.0;
544

545
  if ((new_width == 0) || (new_height == 0))
546
    {
547
      g_message (("gimp_image_scale: Scaling to zero width or height has been rejected."));
548 549
      return;
    }
550

551
  gimp_add_busy_cursors ();
552

553 554 555
  /*  Get the floating layer if one exists  */
  floating_layer = gimp_image_floating_sel (gimage);

Sven Neumann's avatar
Sven Neumann committed
556
  undo_push_group_start (gimage, IMAGE_SCALE_UNDO);
557 558 559 560 561 562 563 564 565

  /*  Relax the floating selection  */
  if (floating_layer)
    floating_sel_relax (floating_layer, TRUE);

  /*  Push the image size to the stack  */
  undo_push_gimage_mod (gimage);

  /*  Set the new width and height  */
566 567 568

  old_width      = gimage->width;
  old_height     = gimage->height;
569
  gimage->width  = new_width;
570
  gimage->height = new_height;
571 572
  img_scale_w    = (gdouble)new_width / (gdouble)old_width;
  img_scale_h    = (gdouble)new_height / (gdouble)old_height;
573
 
574
  /*  Scale all channels  */
575
  for (list = gimage->channels; list; list = g_slist_next (list))
576 577 578 579 580 581
    {
      channel = (Channel *) list->data;
      channel_scale (channel, new_width, new_height);
    }

  /*  Don't forget the selection mask!  */
582 583 584 585 586
  /*  if (channel_is_empty(gimage->selection_mask))
        channel_resize(gimage->selection_mask, new_width, new_height, 0, 0)
      else
  */
        
587 588 589 590 591
  channel_scale (gimage->selection_mask, new_width, new_height);
  gimage_mask_invalidate (gimage);

  /*  Scale all layers  */
  list = gimage->layers;
592
  for (list = gimage->layers; list; list = g_slist_next (list))
593
    {
594 595
      layer = (Layer *) list->data;
      if (layer_scale_by_factors (layer, img_scale_w, img_scale_h) == FALSE)
596 597 598 599 600 601
	{
	  /* Since 0 < img_scale_w, img_scale_h, failure due to one or more     */
	  /* vanishing scaled layer dimensions. Implicit delete implemented     */
	  /* here. Upstream warning implemented in resize_check_layer_scaling() */
          /* [resize.c line 1295], which offers the user the chance to bail out.*/

602
          remove = g_slist_append (remove, layer);
603 604 605 606 607
        }
    }
  /* We defer removing layers lost to scaling until now            */
  /* so as not to mix the operations of iterating over and removal */
  /* from gimage->layers.                                          */  
608

609
  for (list = remove; list; list = g_slist_next (list))
610
    {
611
      layer = list->data;
612
      gimage_remove_layer (gimage, layer);
613
    }
614
  g_slist_free (remove);
615

616
  /*  Scale any Guides  */
617
  for (glist = gimage->guides; glist; glist = g_list_next (glist))
618 619 620 621 622
    {
      guide = (Guide*) glist->data;

      switch (guide->orientation)
	{
623
	case ORIENTATION_HORIZONTAL:
Sven Neumann's avatar
Sven Neumann committed
624
	  undo_push_guide (gimage, guide);
625 626
	  guide->position = (guide->position * new_height) / old_height;
	  break;
627
	case ORIENTATION_VERTICAL:
Sven Neumann's avatar
Sven Neumann committed
628
	  undo_push_guide (gimage, guide);
629 630 631 632 633 634
	  guide->position = (guide->position * new_width) / old_width;
	  break;
	default:
	  g_error("Unknown guide orientation II.\n");
	}
    }
635

636 637 638 639 640 641 642 643
  /*  Make sure the projection matches the gimage size  */
  gimp_image_projection_realloc (gimage);

  /*  Rigor the floating selection  */
  if (floating_layer)
    floating_sel_rigor (floating_layer, TRUE);

  gtk_signal_emit (GTK_OBJECT (gimage), gimp_image_signals[RESIZE]);
644

645
  gimp_remove_busy_cursors (NULL);
646 647 648
}

TileManager *
649
gimp_image_shadow (GimpImage *gimage, 
650 651 652
		   gint       width, 
		   gint       height, 
		   gint       bpp)
653 654
{
  if (gimage->shadow &&
655 656 657
      ((width != tile_manager_level_width (gimage->shadow)) ||
       (height != tile_manager_level_height (gimage->shadow)) ||
       (bpp != tile_manager_level_bpp (gimage->shadow))))
658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679
    gimp_image_free_shadow (gimage);
  else if (gimage->shadow)
    return gimage->shadow;

  gimp_image_allocate_shadow (gimage, width, height, bpp);

  return gimage->shadow;
}

void
gimp_image_free_shadow (GimpImage *gimage)
{
  /*  Free the shadow buffer from the specified gimage if it exists  */
  if (gimage->shadow)
    tile_manager_destroy (gimage->shadow);

  gimage->shadow = NULL;
}

static void
gimp_image_destroy (GtkObject *object)
{
680
  GimpImage* gimage = GIMP_IMAGE (object);
Sven Neumann's avatar
Sven Neumann committed
681 682 683 684 685 686 687 688 689 690 691 692 693

  gimp_image_free_projection (gimage);
  gimp_image_free_shadow (gimage);
  
  if (gimage->cmap)
    g_free (gimage->cmap);
  
  if (gimage->has_filename)
    g_free (gimage->filename);
  
  gimp_image_free_layers (gimage);
  gimp_image_free_channels (gimage);
  channel_delete (gimage->selection_mask);
694

BST 1999 Andy Thomas's avatar
BST 1999 Andy Thomas committed
695 696 697
  if (gimage->comp_preview)
    temp_buf_free (gimage->comp_preview);

Sven Neumann's avatar
Sven Neumann committed
698
  if (gimage->parasites)
699
    gtk_object_unref (GTK_OBJECT (gimage->parasites));
700 701 702
}

void
703 704 705 706 707 708
gimp_image_apply_image (GimpImage	 *gimage,
			GimpDrawable	 *drawable,
			PixelRegion	 *src2PR,
			gint              undo,
			gint              opacity,
			LayerModeEffects  mode,
709
			/*  alternative to using drawable tiles as src1: */
710 711 712
			TileManager	 *src1_tiles,
			gint              x,
			gint              y)
713
{
714 715 716 717 718 719
  Channel     *mask;
  gint         x1, y1, x2, y2;
  gint         offset_x, offset_y;
  PixelRegion  src1PR, destPR, maskPR;
  gint         operation;
  gint         active [MAX_CHANNELS];
720 721

  /*  get the selection mask if one exists  */
722
  mask = (gimage_mask_is_empty (gimage)) ? NULL : gimp_image_get_mask (gimage);
723 724 725 726 727 728 729 730 731 732

  /*  configure the active channel array  */
  gimp_image_get_active_channels (gimage, drawable, active);

  /*  determine what sort of operation is being attempted and
   *  if it's actually legal...
   */
  operation = valid_combinations [drawable_type (drawable)][src2PR->bytes];
  if (operation == -1)
    {
Sven Neumann's avatar
Sven Neumann committed
733
      g_message ("gimp_image_apply_image sent illegal parameters");
734 735 736 737 738 739 740
      return;
    }

  /*  get the layer offsets  */
  drawable_offsets (drawable, &offset_x, &offset_y);

  /*  make sure the image application coordinates are within gimage bounds  */
741
  x1 = CLAMP (x, 0, drawable_width  (drawable));
742
  y1 = CLAMP (y, 0, drawable_height (drawable));
743
  x2 = CLAMP (x + src2PR->w, 0, drawable_width  (drawable));
744 745 746 747 748 749 750 751
  y2 = CLAMP (y + src2PR->h, 0, drawable_height (drawable));

  if (mask)
    {
      /*  make sure coordinates are in mask bounds ...
       *  we need to add the layer offset to transform coords
       *  into the mask coordinate system
       */
752 753 754 755
      x1 = CLAMP (x1, -offset_x, drawable_width (GIMP_DRAWABLE(mask))-offset_x);
      y1 = CLAMP (y1, -offset_y, drawable_height(GIMP_DRAWABLE(mask))-offset_y);
      x2 = CLAMP (x2, -offset_x, drawable_width (GIMP_DRAWABLE(mask))-offset_x);
      y2 = CLAMP (y2, -offset_y, drawable_height(GIMP_DRAWABLE(mask))-offset_y);
756 757 758 759
    }

  /*  If the calling procedure specified an undo step...  */
  if (undo)
760
    undo_push_image (gimp_drawable_gimage (drawable), drawable, x1, y1, x2, y2);
761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782

  /* configure the pixel regions
   *  If an alternative to using the drawable's data as src1 was provided...
   */
  if (src1_tiles)
    pixel_region_init (&src1PR, src1_tiles, x1, y1, (x2 - x1), (y2 - y1), FALSE);
  else
    pixel_region_init (&src1PR, drawable_data (drawable), x1, y1, (x2 - x1), (y2 - y1), FALSE);
  pixel_region_init (&destPR, drawable_data (drawable), x1, y1, (x2 - x1), (y2 - y1), TRUE);
  pixel_region_resize (src2PR, src2PR->x + (x1 - x), src2PR->y + (y1 - y), (x2 - x1), (y2 - y1));

  if (mask)
    {
      int mx, my;

      /*  configure the mask pixel region
       *  don't use x1 and y1 because they are in layer
       *  coordinate system.  Need mask coordinate system
       */
      mx = x1 + offset_x;
      my = y1 + offset_y;

783 784 785 786 787
      pixel_region_init (&maskPR, 
			 drawable_data (GIMP_DRAWABLE(mask)), 
			 mx, my, 
			 (x2 - x1), (y2 - y1), 
			 FALSE);
788 789 790 791 792 793 794 795 796 797 798 799 800 801 802
      combine_regions (&src1PR, src2PR, &destPR, &maskPR, NULL,
		       opacity, mode, active, operation);
    }
  else
    combine_regions (&src1PR, src2PR, &destPR, NULL, NULL,
		     opacity, mode, active, operation);
}

/* Similar to gimp_image_apply_image but works in "replace" mode (i.e.
   transparent pixels in src2 make the result transparent rather
   than opaque.

   Takes an additional mask pixel region as well.
*/
void
803 804 805
gimp_image_replace_image (GimpImage    *gimage, 
			  GimpDrawable *drawable, 
			  PixelRegion  *src2PR,
806 807
			  gint          undo, 
			  gint          opacity,
808
			  PixelRegion  *maskPR,
809 810
			  gint          x, 
			  gint          y)
811
{
812 813 814 815 816 817 818 819
  Channel     *mask;
  gint         x1, y1, x2, y2;
  gint         offset_x, offset_y;
  PixelRegion  src1PR, destPR;
  PixelRegion  mask2PR, tempPR;
  guchar      *temp_data;
  gint         operation;
  gint         active [MAX_CHANNELS];
820 821

  /*  get the selection mask if one exists  */
822
  mask = (gimage_mask_is_empty (gimage)) ? NULL : gimp_image_get_mask (gimage);
823 824 825 826 827 828 829 830 831 832

  /*  configure the active channel array  */
  gimp_image_get_active_channels (gimage, drawable, active);

  /*  determine what sort of operation is being attempted and
   *  if it's actually legal...
   */
  operation = valid_combinations [drawable_type (drawable)][src2PR->bytes];
  if (operation == -1)
    {
Sven Neumann's avatar
Sven Neumann committed
833
      g_message ("gimp_image_apply_image sent illegal parameters");
834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851
      return;
    }

  /*  get the layer offsets  */
  drawable_offsets (drawable, &offset_x, &offset_y);

  /*  make sure the image application coordinates are within gimage bounds  */
  x1 = CLAMP (x, 0, drawable_width (drawable));
  y1 = CLAMP (y, 0, drawable_height (drawable));
  x2 = CLAMP (x + src2PR->w, 0, drawable_width (drawable));
  y2 = CLAMP (y + src2PR->h, 0, drawable_height (drawable));

  if (mask)
    {
      /*  make sure coordinates are in mask bounds ...
       *  we need to add the layer offset to transform coords
       *  into the mask coordinate system
       */
852 853 854 855
      x1 = CLAMP (x1, -offset_x, drawable_width (GIMP_DRAWABLE(mask))-offset_x);
      y1 = CLAMP (y1, -offset_y, drawable_height(GIMP_DRAWABLE(mask))-offset_y);
      x2 = CLAMP (x2, -offset_x, drawable_width (GIMP_DRAWABLE(mask))-offset_x);
      y2 = CLAMP (y2, -offset_y, drawable_height(GIMP_DRAWABLE(mask))-offset_y);
856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879
    }

  /*  If the calling procedure specified an undo step...  */
  if (undo)
    drawable_apply_image (drawable, x1, y1, x2, y2, NULL, FALSE);

  /* configure the pixel regions
   *  If an alternative to using the drawable's data as src1 was provided...
   */
  pixel_region_init (&src1PR, drawable_data (drawable), x1, y1, (x2 - x1), (y2 - y1), FALSE);
  pixel_region_init (&destPR, drawable_data (drawable), x1, y1, (x2 - x1), (y2 - y1), TRUE);
  pixel_region_resize (src2PR, src2PR->x + (x1 - x), src2PR->y + (y1 - y), (x2 - x1), (y2 - y1));

  if (mask)
    {
      int mx, my;

      /*  configure the mask pixel region
       *  don't use x1 and y1 because they are in layer
       *  coordinate system.  Need mask coordinate system
       */
      mx = x1 + offset_x;
      my = y1 + offset_y;

880 881 882 883 884
      pixel_region_init (&mask2PR, 
			 drawable_data (GIMP_DRAWABLE(mask)), 
			 mx, my, 
			 (x2 - x1), (y2 - y1), 
			 FALSE);
885 886 887 888 889 890

      tempPR.bytes = 1;
      tempPR.x = 0;
      tempPR.y = 0;
      tempPR.w = x2 - x1;
      tempPR.h = y2 - y1;
891
      tempPR.rowstride = tempPR.w * tempPR.bytes;
892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924
      temp_data = g_malloc (tempPR.h * tempPR.rowstride);
      tempPR.data = temp_data;

      copy_region (&mask2PR, &tempPR);

      /* apparently, region operations can mutate some PR data. */
      tempPR.x = 0;
      tempPR.y = 0;
      tempPR.w = x2 - x1;
      tempPR.h = y2 - y1;
      tempPR.data = temp_data;

      apply_mask_to_region (&tempPR, maskPR, OPAQUE_OPACITY);

      tempPR.x = 0;
      tempPR.y = 0;
      tempPR.w = x2 - x1;
      tempPR.h = y2 - y1;
      tempPR.data = temp_data;

      combine_regions_replace (&src1PR, src2PR, &destPR, &tempPR, NULL,
		       opacity, active, operation);

      g_free (temp_data);
    }
  else
    combine_regions_replace (&src1PR, src2PR, &destPR, maskPR, NULL,
		     opacity, active, operation);
}

/* Get rid of these! A "foreground" is an UI concept.. */

void
925 926 927
gimp_image_get_foreground (GimpImage    *gimage, 
			   GimpDrawable *drawable, 
			   guchar       *fg)
928
{
929
  guchar pfg[3];
930 931

  /*  Get the palette color  */
932
  gimp_context_get_foreground (NULL, &pfg[0], &pfg[1], &pfg[2]);
933 934 935 936 937

  gimp_image_transform_color (gimage, drawable, pfg, fg, RGB);
}

void
938 939 940
gimp_image_get_background (GimpImage    *gimage, 
			   GimpDrawable *drawable, 
			   guchar       *bg)
941
{
942
  guchar pbg[3];
943 944

  /*  Get the palette color  */
945
  gimp_context_get_background (NULL, &pbg[0], &pbg[1], &pbg[2]);
946 947 948 949

  gimp_image_transform_color (gimage, drawable, pbg, bg, RGB);
}

950
guchar *
951
gimp_image_get_color_at (GimpImage *gimage, 
952 953
			 gint       x, 
			 gint       y)
954
{
955
  Tile   *tile;
956 957
  guchar *src;
  guchar *dest;
958

959 960
  g_return_val_if_fail (GIMP_IS_IMAGE (gimage), NULL);

961
  if (x < 0 || y < 0 || x >= gimage->width || y >= gimage->height)
962 963 964 965
    {
      return NULL;
    }
  dest = g_new (unsigned char, 5);
966 967 968 969
  tile = tile_manager_get_tile (gimp_image_composite (gimage), x, y,
				TRUE, FALSE);
  src = tile_data_pointer (tile, x % TILE_WIDTH, y % TILE_HEIGHT);
  gimp_image_get_color (gimage, gimp_image_composite_type (gimage), dest, src);
970 971

  if (TYPE_HAS_ALPHA (gimp_image_composite_type (gimage)))
972 973 974
    dest[3] = src[gimp_image_composite_bytes (gimage) - 1];
  else
    dest[3] = 255;
975

976 977
  dest[4] = 0;
  tile_release (tile, FALSE);
978

979 980 981
  return dest;
}

982
void
983
gimp_image_get_color (GimpImage     *gimage, 
984
		      GimpImageType  d_type,
985 986
		      guchar        *rgb, 
		      guchar        *src)
987
{
988 989
  g_return_if_fail (GIMP_IS_IMAGE (gimage));

990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004
  switch (d_type)
    {
    case RGB_GIMAGE: case RGBA_GIMAGE:
      map_to_color (0, NULL, src, rgb);
      break;
    case GRAY_GIMAGE: case GRAYA_GIMAGE:
      map_to_color (1, NULL, src, rgb);
      break;
    case INDEXED_GIMAGE: case INDEXEDA_GIMAGE:
      map_to_color (2, gimage->cmap, src, rgb);
      break;
    }
}

void
1005 1006 1007 1008 1009
gimp_image_transform_color (GimpImage         *gimage, 
			    GimpDrawable      *drawable,
			    guchar            *src, 
			    guchar            *dest, 
			    GimpImageBaseType  type)
1010
{
1011
  GimpImageType d_type;
1012

1013 1014
  g_return_if_fail (GIMP_IS_IMAGE (gimage));

1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038
  d_type = (drawable != NULL) ? drawable_type (drawable) :
    gimp_image_base_type_with_alpha (gimage);

  switch (type)
    {
    case RGB:
      switch (d_type)
	{
	case RGB_GIMAGE: case RGBA_GIMAGE:
	  /*  Straight copy  */
	  *dest++ = *src++;
	  *dest++ = *src++;
	  *dest++ = *src++;
	  break;
	case GRAY_GIMAGE: case GRAYA_GIMAGE:
	  /*  NTSC conversion  */
	  *dest = INTENSITY (src[RED_PIX],
			     src[GREEN_PIX],
			     src[BLUE_PIX]);
	  break;
	case INDEXED_GIMAGE: case INDEXEDA_GIMAGE:
	  /*  Least squares method  */
	  *dest = map_rgb_to_indexed (gimage->cmap,
				      gimage->num_cols,
1039
				      gimage,
Lauri Alanko's avatar