gimpimage-resize.c 97.6 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
#include <string.h>
19
#include "gimpimageP.h"
20
#include "cursorutil.h"
21 22
#include "drawable.h"
#include "floating_sel.h"
23
#include "gdisplay.h"
24 25
#include "general.h"
#include "gimage_mask.h"
26
#include "gimpcontext.h"
27
#include "paint_funcs.h"
28
#include "libgimp/parasite.h"
29
#include "parasitelist.h"
30 31
#include "undo.h"
#include "gimpsignal.h"
Manish Singh's avatar
Manish Singh committed
32
#include "gimpparasite.h"
33
#include "path.h"
34
#include "gimprc.h"
35

Sven Neumann's avatar
Sven Neumann committed
36
#include "config.h"
37
#include "libgimp/gimpcolorspace.h"
38
#include "libgimp/gimpintl.h"
39
#include "libgimp/gimplimits.h"
40

scott's avatar
scott committed
41 42
#include "tile_manager.h"
#include "tile.h"
43 44 45
#include "layer_pvt.h"
#include "drawable_pvt.h"		/* ick ick. */

46

47 48 49 50 51 52 53
#ifdef DEBUG
#define TRC(x) printf x
#else
#define TRC(x)
#endif


54 55
/*  Local function declarations  */
static void     gimp_image_free_projection       (GimpImage *);
56
static void     gimp_image_allocate_shadow       (GimpImage *, gint, gint, gint);
57 58 59
static void     gimp_image_allocate_projection   (GimpImage *);
static void     gimp_image_free_layers           (GimpImage *);
static void     gimp_image_free_channels         (GimpImage *);
60 61 62 63
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 *);
64 65

/*  projection functions  */
66 67
static void     project_intensity            (GimpImage *, Layer *,
					      PixelRegion *, PixelRegion *,
68
					      PixelRegion *);
69 70
static void     project_intensity_alpha      (GimpImage *, Layer *,
					      PixelRegion *, PixelRegion *,
71
					      PixelRegion *);
72 73 74 75
static void     project_indexed              (GimpImage *, Layer *,
					      PixelRegion *, PixelRegion *);
static void     project_channel              (GimpImage *, Channel *,
					      PixelRegion *, PixelRegion *);
76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95

/*
 *  Global variables
 */
int valid_combinations[][MAX_CHANNELS + 1] =
{
  /* 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 },
};

96
guint32 next_guide_id = 1;  /* For generating guide_ID handles for PDB stuff */
97

98 99 100 101 102

/*
 *  Static variables
 */

103
enum {
104
  CLEAN,
105 106 107 108 109
  DIRTY,
  REPAINT,
  RENAME,
  RESIZE,
  RESTRUCTURE,
110
  COLORMAP_CHANGED,
111
  UNDO_EVENT,
112 113
  LAST_SIGNAL
};
114 115

static void  gimp_image_destroy (GtkObject *);
116 117

static guint gimp_image_signals[LAST_SIGNAL];
118
static GimpObjectClass *parent_class;
119 120 121 122 123 124 125 126 127 128 129 130 131 132

static void
gimp_image_class_init (GimpImageClass *klass)
{
  GtkObjectClass *object_class;
  GtkType type;
  
  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;

133 134 135
  gimp_image_signals[CLEAN] =
	  gimp_signal_new ("clean", GTK_RUN_FIRST, type, 0,
			   gimp_sigtype_void);
136
  gimp_image_signals[DIRTY] =
137 138
	  gimp_signal_new ("dirty", GTK_RUN_FIRST, type, 0,
			   gimp_sigtype_void);
139
  gimp_image_signals[REPAINT] =
140 141
	  gimp_signal_new ("repaint", GTK_RUN_FIRST, type, 0,
			   gimp_sigtype_int_int_int_int);
142
  gimp_image_signals[RENAME] =
143 144
	  gimp_signal_new ("rename", GTK_RUN_FIRST, type, 0,
			   gimp_sigtype_void);
145
  gimp_image_signals[RESIZE] =
146 147
	  gimp_signal_new ("resize", GTK_RUN_FIRST, type, 0,
			   gimp_sigtype_void);
148
  gimp_image_signals[RESTRUCTURE] =
149 150
	  gimp_signal_new ("restructure", GTK_RUN_FIRST, type, 0,
			   gimp_sigtype_void);
151
  gimp_image_signals[COLORMAP_CHANGED] =
152 153
	  gimp_signal_new ("colormap_changed", GTK_RUN_FIRST, type, 0,
			   gimp_sigtype_int);
154 155 156
  gimp_image_signals[UNDO_EVENT] = 
	  gimp_signal_new ("undo_event", GTK_RUN_FIRST, type, 0,
			   gimp_sigtype_int);
157 158 159 160 161 162 163
  
  gtk_object_class_add_signals (object_class, gimp_image_signals, LAST_SIGNAL);
}


/* static functions */

Sven Neumann's avatar
Sven Neumann committed
164 165
static void 
gimp_image_init (GimpImage *gimage)
166
{
167 168 169
  gimage->has_filename          = FALSE;
  gimage->num_cols              = 0;
  gimage->cmap                  = NULL;
170
  gimage->disp_count            = 0;
171 172
  gimage->instance_count        = 0;
  gimage->shadow                = NULL;
173
  gimage->dirty                 = 1;     /* Why is that? I doubt this is correct. --Sven */
174 175 176 177 178 179 180 181 182 183 184 185
  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;
186
  gimage->group_count           = 0;
187
  gimage->pushing_undo_group    = UNDO_NULL;
188 189 190
  gimage->comp_preview_valid[0] = FALSE;
  gimage->comp_preview_valid[1] = FALSE;
  gimage->comp_preview_valid[2] = FALSE;
191 192 193 194 195 196 197
  gimage->comp_preview          = NULL;
  gimage->parasites             = parasite_list_new();
  gimage->xresolution           = default_xresolution;
  gimage->yresolution           = default_yresolution;
  gimage->unit                  = default_units;
  gimage->save_proc             = NULL;
  gimage->paths                 = NULL;
198 199
}

Sven Neumann's avatar
Sven Neumann committed
200 201 202 203 204
GtkType 
gimp_image_get_type (void) 
{
  static GtkType type;

205 206 207 208 209 210
  GIMP_TYPE_INIT (type,
		  GimpImage,
		  GimpImageClass,
		  gimp_image_init,
		  gimp_image_class_init,
		  GIMP_TYPE_OBJECT);
Sven Neumann's avatar
Sven Neumann committed
211
  return type;
212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235
}

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:
236
      g_assert_not_reached ();
237 238 239 240
    }

  /*  allocate the new projection  */
  gimage->projection = tile_manager_new (gimage->width, gimage->height, gimage->proj_bytes);
241
  tile_manager_set_user_data (gimage->projection, (void *) gimage);
242 243 244 245 246 247 248 249 250 251 252 253 254
  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
255
gimp_image_allocate_shadow (GimpImage *gimage, 
256 257 258
			    gint       width, 
			    gint       height, 
			    gint       bpp)
259 260 261 262 263 264 265 266 267
{
  /*  allocate the new projection  */
  gimage->shadow = tile_manager_new (width, height, bpp);
}


/* function definitions */

GimpImage *
268 269 270
gimp_image_new (gint               width,
		gint               height,
		GimpImageBaseType  base_type)
271
{
272 273
  GimpImage *gimage = GIMP_IMAGE (gtk_type_new (gimp_image_get_type ()));
  gint i;
274

275 276 277
  gimage->filename  = NULL;
  gimage->width     = width;
  gimage->height    = height;
278 279 280 281 282 283 284 285 286 287
  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;
288
      gimage->cmap     = (guchar *) g_malloc0 (COLORMAP_SIZE);
289 290 291 292 293 294
      break;
    default:
      break;
    }

  /*  configure the active pointers  */
295
  gimage->active_layer   = NULL;
296
  gimage->active_channel = NULL;  /* no default active channel */
297
  gimage->floating_sel   = NULL;
298 299 300 301

  /*  set all color channels visible and active  */
  for (i = 0; i < MAX_CHANNELS; i++)
    {
302 303
      gimage->visible[i] = TRUE;
      gimage->active[i]  = TRUE;
304 305 306
    }

  /* create the selection mask */
307 308
  gimage->selection_mask = channel_new_mask (gimage,
					     gimage->width, gimage->height);
309

310
  /* set the qmask properties */
311 312
  gimage->qmask_state    = FALSE;
  gimage->qmask_opacity  = 50;
313 314 315
  gimage->qmask_color[0] = 255; 
  gimage->qmask_color[1] = 0; 
  gimage->qmask_color[2] = 0; 
316 317 318 319 320

  return gimage;
}

void
321
gimp_image_set_filename (GimpImage *gimage, 
322
			 gchar     *filename)
323
{
324 325
  gchar *new_filename, *old_filename;
  gboolean free_old;
326

327 328 329 330 331 332
  /* 
   * 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.
   */

333
  new_filename = g_strdup (filename);
334 335
  old_filename = gimage->filename;
  free_old = gimage->has_filename;
336 337 338 339 340 341 342 343 344 345 346 347

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

348 349 350
  if (free_old)
    g_free (old_filename);

351 352 353
  gtk_signal_emit (GTK_OBJECT (gimage), gimp_image_signals[RENAME]);
}

354
void
355
gimp_image_set_resolution (GimpImage *gimage,
356 357
			   gdouble    xresolution,
			   gdouble    yresolution)
358
{
359 360 361 362 363
  /* 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;

364 365 366
  /* 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)
367 368
    return;

369
  undo_push_resolution (gimage);
370

371 372
  gimage->xresolution = xresolution;
  gimage->yresolution = yresolution;
373 374 375

  /* really just want to recalc size and repaint */
  gdisplays_shrink_wrap (gimage);
376 377
}

378 379
void
gimp_image_get_resolution (GimpImage *gimage,
380 381
			   gdouble   *xresolution,
			   gdouble   *yresolution)
382
{
383 384
  g_return_if_fail (xresolution && yresolution);

385 386
  *xresolution = gimage->xresolution;
  *yresolution = gimage->yresolution;
387 388
}

389 390
void
gimp_image_set_unit (GimpImage *gimage,
391
		     GimpUnit   unit)
392
{
393 394
  undo_push_resolution (gimage);

395 396 397
  gimage->unit = unit;
}

398
GimpUnit
399 400 401 402 403
gimp_image_get_unit (GimpImage *gimage)
{
  return gimage->unit;
}

404
void
Sven Neumann's avatar
Sven Neumann committed
405 406
gimp_image_set_save_proc (GimpImage     *gimage, 
			  PlugInProcDef *proc)
407 408 409 410 411 412 413 414 415
{
  gimage->save_proc = proc;
}

PlugInProcDef *
gimp_image_get_save_proc (GimpImage *gimage)
{
  return gimage->save_proc;
}
416

417
void
418
gimp_image_resize (GimpImage *gimage, 
419 420 421 422
		   gint       new_width, 
		   gint       new_height,
		   gint       offset_x, 
		   gint       offset_y)
423 424
{
  Channel *channel;
425 426 427 428
  Layer   *layer;
  Layer   *floating_layer;
  GSList  *list;
  GList   *guide_list;
429

430 431
  gimp_add_busy_cursors();

432
  g_assert (new_width > 0 && new_height > 0);
433 434 435 436

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

Sven Neumann's avatar
Sven Neumann committed
437
  undo_push_group_start (gimage, IMAGE_RESIZE_UNDO);
438 439 440 441 442 443 444 445 446

  /*  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  */
447
  gimage->width  = new_width;
448 449 450 451 452 453 454 455 456
  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);
457 458 459 460 461 462 463 464 465 466

    }

  /*  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
467
      guide_list = g_list_next (guide_list);
468 469 470

      switch (guide->orientation)
	{
471
	case ORIENTATION_HORIZONTAL:
Sven Neumann's avatar
Sven Neumann committed
472
	  undo_push_guide (gimage, guide);
473 474 475 476
	  guide->position += offset_y;
	  if (guide->position < 0 || guide->position > new_height)
	    gimp_image_delete_guide (gimage, guide);
	  break;
477
	case ORIENTATION_VERTICAL:
Sven Neumann's avatar
Sven Neumann committed
478
	  undo_push_guide (gimage, guide);
479 480 481 482 483 484 485
	  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");
	}
486 487 488
    }

  /*  Don't forget the selection mask!  */
489 490
  channel_resize (gimage->selection_mask,
		  new_width, new_height, offset_x, offset_y);
491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509
  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]);
510

511
  gimp_remove_busy_cursors (NULL);
512 513
}

514 515 516 517 518 519 520 521 522 523 524 525
gint
gimp_image_get_width (const GimpImage *gimage)
{
  return gimage->width;
}

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

526
void
527
gimp_image_scale (GimpImage *gimage, 
528 529
		  gint       new_width, 
		  gint       new_height)
530 531
{
  Channel *channel;
Sven Neumann's avatar
Sven Neumann committed
532 533 534
  Layer   *layer;
  Layer   *floating_layer;
  GSList  *list;
535
  GSList  *remove = NULL;
Sven Neumann's avatar
Sven Neumann committed
536 537
  GList   *glist;
  Guide   *guide;
538 539 540 541
  gint    old_width, old_height;
  gdouble img_scale_w = 1.0;
  gdouble img_scale_h = 1.0;

542
  if ((new_width == 0) || (new_height == 0))
543
    {
544
      g_message (("gimp_image_scale: Scaling to zero width or height has been rejected."));
545 546
      return;
    }
547

548
  gimp_add_busy_cursors ();
549

550 551 552
  /*  Get the floating layer if one exists  */
  floating_layer = gimp_image_floating_sel (gimage);

Sven Neumann's avatar
Sven Neumann committed
553
  undo_push_group_start (gimage, IMAGE_SCALE_UNDO);
554 555 556 557 558 559 560 561 562

  /*  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  */
563 564 565

  old_width      = gimage->width;
  old_height     = gimage->height;
566
  gimage->width  = new_width;
567
  gimage->height = new_height;
568 569
  img_scale_w    = (gdouble)new_width / (gdouble)old_width;
  img_scale_h    = (gdouble)new_height / (gdouble)old_height;
570
 
571
  /*  Scale all channels  */
572
  for (list = gimage->channels; list; list = g_slist_next (list))
573 574 575 576 577 578 579 580 581 582 583
    {
      channel = (Channel *) list->data;
      channel_scale (channel, new_width, new_height);
    }

  /*  Don't forget the selection mask!  */
  channel_scale (gimage->selection_mask, new_width, new_height);
  gimage_mask_invalidate (gimage);

  /*  Scale all layers  */
  list = gimage->layers;
584
  for (list = gimage->layers; list; list = g_slist_next (list))
585
    {
586 587
      layer = (Layer *) list->data;
      if (layer_scale_by_factors (layer, img_scale_w, img_scale_h) == FALSE)
588 589 590 591 592 593
	{
	  /* 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.*/

594
          remove = g_slist_append (remove, layer);
595 596 597 598 599
        }
    }
  /* We defer removing layers lost to scaling until now            */
  /* so as not to mix the operations of iterating over and removal */
  /* from gimage->layers.                                          */  
600

601
  for (list = remove; list; list = g_slist_next (list))
602
    {
603
      layer = list->data;
604
      gimage_remove_layer (gimage, layer);
605
    }
606
  g_slist_free (remove);
607

608
  /*  Scale any Guides  */
609
  for (glist = gimage->guides; glist; glist = g_list_next (glist))
610 611 612 613 614
    {
      guide = (Guide*) glist->data;

      switch (guide->orientation)
	{
615
	case ORIENTATION_HORIZONTAL:
Sven Neumann's avatar
Sven Neumann committed
616
	  undo_push_guide (gimage, guide);
617 618
	  guide->position = (guide->position * new_height) / old_height;
	  break;
619
	case ORIENTATION_VERTICAL:
Sven Neumann's avatar
Sven Neumann committed
620
	  undo_push_guide (gimage, guide);
621 622 623 624 625 626
	  guide->position = (guide->position * new_width) / old_width;
	  break;
	default:
	  g_error("Unknown guide orientation II.\n");
	}
    }
627

628 629 630 631 632 633 634 635
  /*  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]);
636

637
  gimp_remove_busy_cursors (NULL);
638 639 640
}

TileManager *
641
gimp_image_shadow (GimpImage *gimage, 
642 643 644
		   gint       width, 
		   gint       height, 
		   gint       bpp)
645 646
{
  if (gimage->shadow &&
647 648 649
      ((width != tile_manager_level_width (gimage->shadow)) ||
       (height != tile_manager_level_height (gimage->shadow)) ||
       (bpp != tile_manager_level_bpp (gimage->shadow))))
650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671
    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)
{
672
  GimpImage* gimage = GIMP_IMAGE (object);
Sven Neumann's avatar
Sven Neumann committed
673 674 675 676 677 678 679 680 681 682 683 684 685

  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);
686

BST 1999 Andy Thomas's avatar
BST 1999 Andy Thomas committed
687 688 689
  if (gimage->comp_preview)
    temp_buf_free (gimage->comp_preview);

Sven Neumann's avatar
Sven Neumann committed
690
  if (gimage->parasites)
691
    gtk_object_unref (GTK_OBJECT (gimage->parasites));
692 693 694
}

void
695 696 697 698 699 700
gimp_image_apply_image (GimpImage	 *gimage,
			GimpDrawable	 *drawable,
			PixelRegion	 *src2PR,
			gint              undo,
			gint              opacity,
			LayerModeEffects  mode,
701
			/*  alternative to using drawable tiles as src1: */
702 703 704
			TileManager	 *src1_tiles,
			gint              x,
			gint              y)
705
{
Sven Neumann's avatar
Sven Neumann committed
706
  Channel *mask;
707 708
  gint x1, y1, x2, y2;
  gint offset_x, offset_y;
709
  PixelRegion src1PR, destPR, maskPR;
710 711
  gint operation;
  gint active [MAX_CHANNELS];
712 713

  /*  get the selection mask if one exists  */
714
  mask = (gimage_mask_is_empty (gimage)) ? NULL : gimp_image_get_mask (gimage);
715 716 717 718 719 720 721 722 723 724

  /*  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
725
      g_message ("gimp_image_apply_image sent illegal parameters");
726 727 728 729 730 731 732
      return;
    }

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

  /*  make sure the image application coordinates are within gimage bounds  */
733
  x1 = CLAMP (x, 0, drawable_width  (drawable));
734
  y1 = CLAMP (y, 0, drawable_height (drawable));
735
  x2 = CLAMP (x + src2PR->w, 0, drawable_width  (drawable));
736 737 738 739 740 741 742 743
  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
       */
744 745 746 747
      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);
748 749 750 751
    }

  /*  If the calling procedure specified an undo step...  */
  if (undo)
752
    undo_push_image (gimp_drawable_gimage (drawable), drawable, x1, y1, x2, y2);
753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790

  /* 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;

      pixel_region_init (&maskPR, drawable_data (GIMP_DRAWABLE(mask)), mx, my, (x2 - x1), (y2 - y1), FALSE);
      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
791 792 793
gimp_image_replace_image (GimpImage    *gimage, 
			  GimpDrawable *drawable, 
			  PixelRegion  *src2PR,
794 795
			  gint          undo, 
			  gint          opacity,
796
			  PixelRegion  *maskPR,
797 798
			  gint          x, 
			  gint          y)
799
{
Sven Neumann's avatar
Sven Neumann committed
800
  Channel *mask;
801 802
  gint x1, y1, x2, y2;
  gint offset_x, offset_y;
803 804
  PixelRegion src1PR, destPR;
  PixelRegion mask2PR, tempPR;
805 806 807
  guchar *temp_data;
  gint operation;
  gint active [MAX_CHANNELS];
808 809

  /*  get the selection mask if one exists  */
810
  mask = (gimage_mask_is_empty (gimage)) ? NULL : gimp_image_get_mask (gimage);
811 812 813 814 815 816 817 818 819 820

  /*  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
821
      g_message ("gimp_image_apply_image sent illegal parameters");
822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839
      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
       */
840 841 842 843
      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);
844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908
    }

  /*  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;

      pixel_region_init (&mask2PR, drawable_data (GIMP_DRAWABLE(mask)), mx, my, (x2 - x1), (y2 - y1), FALSE);

      tempPR.bytes = 1;
      tempPR.x = 0;
      tempPR.y = 0;
      tempPR.w = x2 - x1;
      tempPR.h = y2 - y1;
      tempPR.rowstride = mask2PR.rowstride;
      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
909 910 911
gimp_image_get_foreground (GimpImage    *gimage, 
			   GimpDrawable *drawable, 
			   guchar       *fg)
912
{
913
  guchar pfg[3];
914 915

  /*  Get the palette color  */
916
  gimp_context_get_foreground (NULL, &pfg[0], &pfg[1], &pfg[2]);
917 918 919 920 921

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

void
922 923 924
gimp_image_get_background (GimpImage    *gimage, 
			   GimpDrawable *drawable, 
			   guchar       *bg)
925
{
926
  guchar pbg[3];
927 928

  /*  Get the palette color  */
929
  gimp_context_get_background (NULL, &pbg[0], &pbg[1], &pbg[2]);
930 931 932 933

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

934
guchar *
935
gimp_image_get_color_at (GimpImage *gimage, 
936 937
			 gint       x, 
			 gint       y)
938 939
{
  Tile *tile;
940 941
  guchar *src;
  guchar *dest;
942

943 944
  g_return_val_if_fail (GIMP_IS_IMAGE (gimage), NULL);

945
  if (x < 0 || y < 0 || x >= gimage->width || y >= gimage->height)
946 947 948 949
    {
      return NULL;
    }
  dest = g_new (unsigned char, 5);
950 951 952 953
  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);
954 955

  if (TYPE_HAS_ALPHA (gimp_image_composite_type (gimage)))
956 957 958
    dest[3] = src[gimp_image_composite_bytes (gimage) - 1];
  else
    dest[3] = 255;
959

960 961
  dest[4] = 0;
  tile_release (tile, FALSE);
962

963 964 965
  return dest;
}

966
void
967
gimp_image_get_color (GimpImage     *gimage, 
968
		      GimpImageType  d_type,
969 970
		      guchar        *rgb, 
		      guchar        *src)
971
{
972 973
  g_return_if_fail (GIMP_IS_IMAGE (gimage));

974 975 976 977 978 979 980 981 982 983 984 985 986 987 988
  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
989 990 991 992 993
gimp_image_transform_color (GimpImage         *gimage, 
			    GimpDrawable      *drawable,
			    guchar            *src, 
			    guchar            *dest, 
			    GimpImageBaseType  type)
994
{
995
  GimpImageType d_type;
996

997 998
  g_return_if_fail (GIMP_IS_IMAGE (gimage));

999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022
  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,
1023
				      gimage,
1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046
				      src[RED_PIX],
				      src[GREEN_PIX],
				      src[BLUE_PIX]);
	  break;
	}
      break;
    case GRAY:
      switch (d_type)
	{
	case RGB_GIMAGE: case RGBA_GIMAGE:
	  /*  Gray to RG&B */
	  *dest++ = *src;
	  *dest++ = *src;
	  *dest++ = *src;
	  break;
	case GRAY_GIMAGE: case GRAYA_GIMAGE:
	  /*  Straight copy  */
	  *dest = *src;
	  break;
	case INDEXED_GIMAGE: case INDEXEDA_GIMAGE:
	  /*  Least squares method  */
	  *dest = map_rgb_to_indexed (gimage->cmap,
				      gimage->num_cols,
1047
				      gimage,
1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063
				      src[GRAY_PIX],
				      src[GRAY_PIX],
				      src[GRAY_PIX]);
	  break;
	}
      break;
    default:
      break;
    }
}

Guide*
gimp_image_add_hguide (GimpImage *gimage)
{
  Guide *guide;

1064 1065
  g_return_val_if_fail (GIMP_IS_IMAGE (gimage), NULL);

1066
  guide = g_new (Guide, 1);