gimpimage-resize.c 108 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 20
#include "config.h"

21
#include <string.h>
22

Sven Neumann's avatar
Sven Neumann committed
23 24
#include <gtk/gtk.h>

25
#include "libgimpcolor/gimpcolor.h"
26
#include "libgimpmath/gimpmath.h"
27

Sven Neumann's avatar
Sven Neumann committed
28 29
#include "apptypes.h"

30 31
#include "paint-funcs/paint-funcs.h"

32
#include "cursorutil.h"
33 34
#include "drawable.h"
#include "floating_sel.h"
35
#include "gdisplay.h"
36
#include "gimage_mask.h"
37
#include "gimpcontext.h"
38
#include "gimpimage.h"
39
#include "gimpimage-undo.h"
40
#include "gimplayer.h"
41
#include "gimplayermask.h"
42
#include "gimplist.h"
43
#include "gimpmarshal.h"
44
#include "gimprc.h"
Manish Singh's avatar
Manish Singh committed
45
#include "gimpparasite.h"
46
#include "gimpundostack.h"
47
#include "parasitelist.h"
48
#include "path.h"
49 50
#include "pixel_region.h"
#include "temp_buf.h"
scott's avatar
scott committed
51 52
#include "tile_manager.h"
#include "tile.h"
53
#include "undo.h"
54

55
#include "libgimp/gimplimits.h"
56
#include "libgimp/gimpparasite.h"
57 58 59

#include "libgimp/gimpintl.h"

60

61 62 63 64 65 66 67
#ifdef DEBUG
#define TRC(x) printf x
#else
#define TRC(x)
#endif


68
/*  Local function declarations  */
69 70 71 72 73
static void     gimp_image_class_init            (GimpImageClass *klass);
static void     gimp_image_init                  (GimpImage      *gimage);
static void     gimp_image_destroy               (GtkObject      *object);
static void     gimp_image_name_changed          (GimpObject     *object);
static void     gimp_image_invalidate_preview    (GimpViewable   *viewable);
74
static TempBuf *gimp_image_get_preview           (GimpViewable   *gimage,
75 76
						  gint            width,
						  gint            height);
77
static TempBuf *gimp_image_get_new_preview       (GimpViewable   *viewable,
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
						  gint            width, 
						  gint            height);
static void     gimp_image_free_projection       (GimpImage      *gimage);
static void     gimp_image_allocate_shadow       (GimpImage      *gimage,
						  gint            width,
						  gint            height,
						  gint            bpp);
static void     gimp_image_allocate_projection   (GimpImage      *gimage);
static void     gimp_image_construct_layers      (GimpImage      *gimage,
						  gint            x,
						  gint            y,
						  gint            w,
						  gint            h);
static void     gimp_image_construct_channels    (GimpImage      *gimage,
						  gint            x,
						  gint            y,
						  gint            w,
						  gint            h);
static void     gimp_image_initialize_projection (GimpImage      *gimage,
						  gint            x,
						  gint            y,
						  gint            w,
						  gint            h);
static void     gimp_image_get_active_channels   (GimpImage      *gimage,
						  GimpDrawable   *drawable,
						  gint           *active);
104 105

/*  projection functions  */
106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128
static void     project_intensity                (GimpImage      *gimage,
						  GimpLayer      *layer,
						  PixelRegion    *src,
						  PixelRegion    *dest,
						  PixelRegion    *mask);
static void     project_intensity_alpha          (GimpImage      *gimage,
						  GimpLayer      *layer,
						  PixelRegion    *src,
						  PixelRegion    *dest,
						  PixelRegion    *mask);
static void     project_indexed                  (GimpImage      *gimage,
						  GimpLayer      *layer,
						  PixelRegion    *src,
						  PixelRegion    *dest);
static void     project_indexed_alpha            (GimpImage      *gimage, 
						  GimpLayer      *layer,
						  PixelRegion    *src, 
						  PixelRegion    *dest,
						  PixelRegion    *mask);
static void     project_channel                  (GimpImage      *gimage,
						  GimpChannel    *channel,
						  PixelRegion    *src,
						  PixelRegion    *src2);
129 130 131 132

/*
 *  Global variables
 */
133
gint valid_combinations[][MAX_CHANNELS + 1] =
134 135 136 137 138 139 140 141 142 143 144 145 146 147 148
{
  /* 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 },
};

149
guint32 next_guide_id = 1;  /* For generating guide_ID handles for PDB stuff */
150

151 152 153 154 155

/*
 *  Static variables
 */

156 157
enum
{
158
  MODE_CHANGED,
159 160
  ACTIVE_LAYER_CHANGED,
  ACTIVE_CHANNEL_CHANGED,
161 162
  COMPONENT_VISIBILITY_CHANGED,
  COMPONENT_ACTIVE_CHANGED,
163
  CLEAN,
164 165 166 167
  DIRTY,
  REPAINT,
  RESIZE,
  RESTRUCTURE,
168
  COLORMAP_CHANGED,
169
  UNDO_EVENT,
170 171
  LAST_SIGNAL
};
172

173 174
static guint gimp_image_signals[LAST_SIGNAL] = { 0 };

175
static GimpViewableClass *parent_class = NULL;
176

177 178 179
static gint        global_image_ID  = 1;
static GHashTable *gimp_image_table = NULL;

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
GtkType 
gimp_image_get_type (void) 
{
  static GtkType image_type = 0;

  if (! image_type)
    {
      GtkTypeInfo image_info =
      {
        "GimpImage",
        sizeof (GimpImage),
        sizeof (GimpImageClass),
        (GtkClassInitFunc) gimp_image_class_init,
        (GtkObjectInitFunc) gimp_image_init,
        /* reserved_1 */ NULL,
        /* reserved_2 */ NULL,
        (GtkClassInitFunc) NULL,
      };

      image_type = gtk_type_unique (GIMP_TYPE_VIEWABLE, &image_info);
    }

  return image_type;
}

206 207 208
static void
gimp_image_class_init (GimpImageClass *klass)
{
209 210 211
  GtkObjectClass    *object_class;
  GimpObjectClass   *gimp_object_class;
  GimpViewableClass *viewable_class;
212

213 214
  object_class      = (GtkObjectClass *) klass;
  gimp_object_class = (GimpObjectClass *) klass;
215
  viewable_class    = (GimpViewableClass *) klass;
216

217
  parent_class = gtk_type_class (GIMP_TYPE_VIEWABLE);
218

219 220 221 222 223 224 225 226 227
  gimp_image_signals[MODE_CHANGED] =
    gtk_signal_new ("mode_changed",
                    GTK_RUN_FIRST,
                    object_class->type,
                    GTK_SIGNAL_OFFSET (GimpImageClass,
				       mode_changed),
                    gtk_signal_default_marshaller,
                    GTK_TYPE_NONE, 0);

228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245
  gimp_image_signals[ACTIVE_LAYER_CHANGED] =
    gtk_signal_new ("active_layer_changed",
                    GTK_RUN_FIRST,
                    object_class->type,
                    GTK_SIGNAL_OFFSET (GimpImageClass,
				       active_layer_changed),
                    gtk_signal_default_marshaller,
                    GTK_TYPE_NONE, 0);

  gimp_image_signals[ACTIVE_CHANNEL_CHANGED] =
    gtk_signal_new ("active_channel_changed",
                    GTK_RUN_FIRST,
                    object_class->type,
                    GTK_SIGNAL_OFFSET (GimpImageClass,
				       active_channel_changed),
                    gtk_signal_default_marshaller,
                    GTK_TYPE_NONE, 0);

246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265
  gimp_image_signals[COMPONENT_VISIBILITY_CHANGED] =
    gtk_signal_new ("component_visibility_changed",
                    GTK_RUN_FIRST,
                    object_class->type,
                    GTK_SIGNAL_OFFSET (GimpImageClass,
				       component_visibility_changed),
                    gtk_marshal_NONE__INT,
                    GTK_TYPE_NONE, 1,
		    GTK_TYPE_INT);

  gimp_image_signals[COMPONENT_ACTIVE_CHANGED] =
    gtk_signal_new ("component_active_changed",
                    GTK_RUN_FIRST,
                    object_class->type,
                    GTK_SIGNAL_OFFSET (GimpImageClass,
				       component_active_changed),
                    gtk_marshal_NONE__INT,
                    GTK_TYPE_NONE, 1,
		    GTK_TYPE_INT);

266
  gimp_image_signals[CLEAN] =
267 268 269 270 271 272 273 274
    gtk_signal_new ("clean",
                    GTK_RUN_FIRST,
                    object_class->type,
                    GTK_SIGNAL_OFFSET (GimpImageClass,
				       clean),
                    gtk_signal_default_marshaller,
                    GTK_TYPE_NONE, 0);

275
  gimp_image_signals[DIRTY] =
276 277 278 279 280 281 282 283
    gtk_signal_new ("dirty",
                    GTK_RUN_FIRST,
                    object_class->type,
                    GTK_SIGNAL_OFFSET (GimpImageClass,
				       dirty),
                    gtk_signal_default_marshaller,
                    GTK_TYPE_NONE, 0);

284
  gimp_image_signals[REPAINT] =
285 286 287 288 289 290 291 292 293 294 295 296
    gtk_signal_new ("repaint",
                    GTK_RUN_FIRST,
                    object_class->type,
                    GTK_SIGNAL_OFFSET (GimpImageClass,
				       repaint),
                    gimp_marshal_NONE__INT_INT_INT_INT,
                    GTK_TYPE_NONE, 4,
		    GTK_TYPE_INT,
		    GTK_TYPE_INT,
		    GTK_TYPE_INT,
		    GTK_TYPE_INT);

297
  gimp_image_signals[RESIZE] =
298 299 300 301 302 303 304 305
    gtk_signal_new ("resize",
                    GTK_RUN_FIRST,
                    object_class->type,
                    GTK_SIGNAL_OFFSET (GimpImageClass,
				       resize),
                    gtk_signal_default_marshaller,
                    GTK_TYPE_NONE, 0);

306
  gimp_image_signals[RESTRUCTURE] =
307 308 309 310 311 312 313 314
    gtk_signal_new ("restructure",
                    GTK_RUN_FIRST,
                    object_class->type,
                    GTK_SIGNAL_OFFSET (GimpImageClass,
				       restructure),
                    gtk_signal_default_marshaller,
                    GTK_TYPE_NONE, 0);

315
  gimp_image_signals[COLORMAP_CHANGED] =
316 317 318 319 320 321 322 323 324
    gtk_signal_new ("colormap_changed",
                    GTK_RUN_FIRST,
                    object_class->type,
                    GTK_SIGNAL_OFFSET (GimpImageClass,
				       colormap_changed),
                    gtk_marshal_NONE__INT,
                    GTK_TYPE_NONE, 1,
		    GTK_TYPE_INT);

325
  gimp_image_signals[UNDO_EVENT] = 
326 327 328 329 330 331 332 333
    gtk_signal_new ("undo_event",
                    GTK_RUN_FIRST,
                    object_class->type,
                    GTK_SIGNAL_OFFSET (GimpImageClass,
				       undo_event),
                    gtk_marshal_NONE__INT,
                    GTK_TYPE_NONE, 1,
		    GTK_TYPE_INT);
334

335
  gtk_object_class_add_signals (object_class, gimp_image_signals, LAST_SIGNAL);
336

337
  object_class->destroy               = gimp_image_destroy;
338

339
  gimp_object_class->name_changed     = gimp_image_name_changed;
340

341 342 343
  viewable_class->invalidate_preview  = gimp_image_invalidate_preview;
  viewable_class->get_preview         = gimp_image_get_preview;
  viewable_class->get_new_preview     = gimp_image_get_new_preview;
344

345 346 347 348 349 350 351 352 353 354 355 356 357
  klass->active_layer_changed         = NULL;
  klass->active_channel_changed       = NULL;
  klass->component_visibility_changed = NULL;
  klass->component_active_changed     = NULL;
  klass->clean                        = NULL;
  klass->dirty                        = NULL;
  klass->repaint                      = NULL;
  klass->resize                       = NULL;
  klass->restructure                  = NULL;
  klass->colormap_changed             = NULL;
  klass->undo_event                   = NULL;
  klass->undo                         = gimp_image_undo;
  klass->redo                         = gimp_image_redo;
358 359 360 361 362
}


/* static functions */

Sven Neumann's avatar
Sven Neumann committed
363 364
static void 
gimp_image_init (GimpImage *gimage)
365
{
366 367
  gimage->ID                    = global_image_ID++;

368 369 370 371 372 373 374 375 376
  gimage->save_proc             = NULL;

  gimage->width                 = 0;
  gimage->height                = 0;
  gimage->xresolution           = default_xresolution;
  gimage->yresolution           = default_yresolution;
  gimage->unit                  = default_units;
  gimage->base_type             = RGB;

377
  gimage->cmap                  = NULL;
378 379
  gimage->num_cols              = 0;

380
  gimage->dirty                 = 1;
381
  gimage->undo_on               = TRUE;
382 383 384 385

  gimage->instance_count        = 0;
  gimage->disp_count            = 0;

386
  gimage->tattoo_state          = 0;
387 388 389 390 391

  gimage->shadow                = NULL;

  gimage->construct_flag        = -1;
  gimage->proj_type             = RGBA_GIMAGE;
392
  gimage->projection            = NULL;
393

394
  gimage->guides                = NULL;
395

396 397 398 399
  gimage->layers                = gimp_list_new (GIMP_TYPE_LAYER, 
						 GIMP_CONTAINER_POLICY_STRONG);
  gimage->channels              = gimp_list_new (GIMP_TYPE_CHANNEL, 
						 GIMP_CONTAINER_POLICY_STRONG);
400
  gimage->layer_stack           = NULL;
401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418

  gimage->active_layer          = NULL;
  gimage->active_channel        = NULL;
  gimage->floating_sel          = NULL;
  gimage->selection_mask        = NULL;

  gimage->parasites             = parasite_list_new ();

  gimage->paths                 = NULL;

  gimage->by_color_select       = FALSE;

  gimage->qmask_state           = FALSE;
  gimage->qmask_color.r         = 1.0;
  gimage->qmask_color.g         = 0.0;
  gimage->qmask_color.b         = 0.0;
  gimage->qmask_color.a         = 0.5;

419 420 421 422
  gimage->undo_stack            = NULL;
  gimage->redo_stack            = NULL;
  gimage->undo_bytes            = 0;
  gimage->undo_levels           = 0;
423
  gimage->group_count           = 0;
424
  gimage->pushing_undo_group    = UNDO_NULL;
425 426
  gimage->undo_history          = NULL;

427 428 429
  gimage->new_undo_stack        = gimp_undo_stack_new (gimage);
  gimage->new_redo_stack        = gimp_undo_stack_new (gimage);

430
  gimage->comp_preview          = NULL;
431
  gimage->comp_preview_valid    = FALSE;
432 433 434 435 436 437 438

  if (gimp_image_table == NULL)
    gimp_image_table = g_hash_table_new (g_direct_hash, NULL);

  g_hash_table_insert (gimp_image_table,
		       GINT_TO_POINTER (gimage->ID),
		       (gpointer) gimage);
439 440
}

441 442
static void
gimp_image_destroy (GtkObject *object)
Sven Neumann's avatar
Sven Neumann committed
443
{
444 445 446 447 448
  GimpImage *gimage;

  gimage = GIMP_IMAGE (object);

  g_hash_table_remove (gimp_image_table, GINT_TO_POINTER (gimage->ID));
449

450 451 452 453 454
  gimp_image_free_projection (gimage);
  gimp_image_free_shadow (gimage);
  
  if (gimage->cmap)
    g_free (gimage->cmap);
455 456 457 458
  
  gtk_object_unref (GTK_OBJECT (gimage->layers));
  gtk_object_unref (GTK_OBJECT (gimage->channels));
  g_slist_free (gimage->layer_stack);
459 460

  gtk_object_unref (GTK_OBJECT (gimage->selection_mask));
461

462 463 464 465 466
  if (gimage->comp_preview)
    temp_buf_free (gimage->comp_preview);

  if (gimage->parasites)
    gtk_object_unref (GTK_OBJECT (gimage->parasites));
467 468 469

  gtk_object_unref (GTK_OBJECT (gimage->new_undo_stack));
  gtk_object_unref (GTK_OBJECT (gimage->new_redo_stack));
470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487
}

static void
gimp_image_name_changed (GimpObject *object)
{
  GimpImage   *gimage;
  const gchar *name;

  if (GIMP_OBJECT_CLASS (parent_class)->name_changed)
    GIMP_OBJECT_CLASS (parent_class)->name_changed (object);

  gimage = GIMP_IMAGE (object);
  name   = gimp_object_get_name (object);

  if (! (name && strlen (name)))
    {
      g_free (object->name);
      object->name = NULL;
488
    }
489
}
490

491 492 493 494 495 496
static void
gimp_image_invalidate_preview (GimpViewable *viewable)
{
  GimpImage *gimage;
  GimpLayer *layer;

497 498 499
  if (GIMP_VIEWABLE_CLASS (parent_class)->invalidate_preview)
    GIMP_VIEWABLE_CLASS (parent_class)->invalidate_preview (viewable);

500 501 502 503 504 505 506
  gimage = GIMP_IMAGE (viewable);

  /*  Invalidate the floating sel if it exists  */
  if ((layer = gimp_image_floating_sel (gimage)))
    floating_sel_invalidate (layer);

  gimage->comp_preview_valid = FALSE;
507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530
}

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:
531
      g_assert_not_reached ();
532 533 534
    }

  /*  allocate the new projection  */
535 536
  gimage->projection = tile_manager_new (gimage->width, gimage->height,
					 gimage->proj_bytes);
537
  tile_manager_set_user_data (gimage->projection, (void *) gimage);
538 539 540 541 542 543 544 545 546 547 548 549 550
  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
551
gimp_image_allocate_shadow (GimpImage *gimage, 
552 553 554
			    gint       width, 
			    gint       height, 
			    gint       bpp)
555 556 557 558 559 560 561 562 563
{
  /*  allocate the new projection  */
  gimage->shadow = tile_manager_new (width, height, bpp);
}


/* function definitions */

GimpImage *
564 565 566
gimp_image_new (gint               width,
		gint               height,
		GimpImageBaseType  base_type)
567
{
568
  GimpImage *gimage = GIMP_IMAGE (gtk_type_new (GIMP_TYPE_IMAGE));
569
  gint i;
570

571 572
  gimage->width     = width;
  gimage->height    = height;
573 574 575 576 577 578 579 580 581 582
  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;
583
      gimage->cmap     = (guchar *) g_malloc0 (COLORMAP_SIZE);
584 585 586 587 588 589 590 591
      break;
    default:
      break;
    }

  /*  set all color channels visible and active  */
  for (i = 0; i < MAX_CHANNELS; i++)
    {
592 593
      gimage->visible[i] = TRUE;
      gimage->active[i]  = TRUE;
594 595 596
    }

  /* create the selection mask */
Michael Natterer's avatar
Michael Natterer committed
597 598 599
  gimage->selection_mask = gimp_channel_new_mask (gimage,
						  gimage->width,
						  gimage->height);
600 601 602 603 604


  return gimage;
}

605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623
gint
gimp_image_get_ID (GimpImage *gimage)
{
  g_return_val_if_fail (gimage != NULL, -1);
  g_return_val_if_fail (GIMP_IS_IMAGE (gimage), -1);

  return gimage->ID;
}

GimpImage *
gimp_image_get_by_ID (gint image_id)
{
  if (gimp_image_table == NULL)
    return NULL;

  return (GimpImage *) g_hash_table_lookup (gimp_image_table, 
					    GINT_TO_POINTER (image_id));
}

624
void
625 626
gimp_image_set_filename (GimpImage   *gimage,
			 const gchar *filename)
627
{
628 629
  gimp_object_set_name (GIMP_OBJECT (gimage), filename);
}
630

631
void
632
gimp_image_set_resolution (GimpImage *gimage,
633 634
			   gdouble    xresolution,
			   gdouble    yresolution)
635
{
636 637 638 639 640
  /* 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;

641 642 643
  /* 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)
644 645
    return;

646
  undo_push_resolution (gimage);
647

648 649
  gimage->xresolution = xresolution;
  gimage->yresolution = yresolution;
650 651 652

  /* really just want to recalc size and repaint */
  gdisplays_shrink_wrap (gimage);
653 654
}

655
void
656 657 658
gimp_image_get_resolution (const GimpImage *gimage,
			   gdouble         *xresolution,
			   gdouble         *yresolution)
659
{
660 661
  g_return_if_fail (xresolution && yresolution);

662 663
  *xresolution = gimage->xresolution;
  *yresolution = gimage->yresolution;
664 665
}

666 667
void
gimp_image_set_unit (GimpImage *gimage,
668
		     GimpUnit   unit)
669
{
670 671
  undo_push_resolution (gimage);

672 673 674
  gimage->unit = unit;
}

675
GimpUnit
676
gimp_image_get_unit (const GimpImage *gimage)
677 678 679 680
{
  return gimage->unit;
}

681
void
Sven Neumann's avatar
Sven Neumann committed
682 683
gimp_image_set_save_proc (GimpImage     *gimage, 
			  PlugInProcDef *proc)
684 685 686 687 688
{
  gimage->save_proc = proc;
}

PlugInProcDef *
689
gimp_image_get_save_proc (const GimpImage *gimage)
690 691 692
{
  return gimage->save_proc;
}
693

694 695 696 697 698 699 700 701 702 703 704 705
gint
gimp_image_get_width (const GimpImage *gimage)
{
  return gimage->width;
}

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

706
void
707
gimp_image_resize (GimpImage *gimage, 
708 709 710 711
		   gint       new_width, 
		   gint       new_height,
		   gint       offset_x, 
		   gint       offset_y)
712
{
Michael Natterer's avatar
Michael Natterer committed
713 714 715
  GimpChannel *channel;
  GimpLayer   *layer;
  GimpLayer   *floating_layer;
716
  GList       *list;
Michael Natterer's avatar
Michael Natterer committed
717
  GList       *guide_list;
718

719
  gimp_add_busy_cursors ();
720

721
  g_assert (new_width > 0 && new_height > 0);
722 723 724 725

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

Sven Neumann's avatar
Sven Neumann committed
726
  undo_push_group_start (gimage, IMAGE_RESIZE_UNDO);
727 728 729 730 731 732 733 734 735

  /*  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  */
736
  gimage->width  = new_width;
737 738 739
  gimage->height = new_height;

  /*  Resize all channels  */
740 741 742
  for (list = GIMP_LIST (gimage->channels)->list; 
       list; 
       list = g_list_next (list))
743
    {
Michael Natterer's avatar
Michael Natterer committed
744
      channel = (GimpChannel *) list->data;
745

Michael Natterer's avatar
Michael Natterer committed
746
      gimp_channel_resize (channel, new_width, new_height, offset_x, offset_y);
747 748 749 750 751 752 753 754 755
    }

  /*  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
756
      guide_list = g_list_next (guide_list);
757 758 759

      switch (guide->orientation)
	{
760
	case ORIENTATION_HORIZONTAL:
Sven Neumann's avatar
Sven Neumann committed
761
	  undo_push_guide (gimage, guide);
762 763 764 765
	  guide->position += offset_y;
	  if (guide->position < 0 || guide->position > new_height)
	    gimp_image_delete_guide (gimage, guide);
	  break;
766

767
	case ORIENTATION_VERTICAL:
Sven Neumann's avatar
Sven Neumann committed
768
	  undo_push_guide (gimage, guide);
769 770 771 772
	  guide->position += offset_x;
	  if (guide->position < 0 || guide->position > new_width)
	    gimp_image_delete_guide (gimage, guide);
	  break;
773

774
	default:
775
	  g_error ("Unknown guide orientation\n");
776
	}
777 778 779
    }

  /*  Don't forget the selection mask!  */
Michael Natterer's avatar
Michael Natterer committed
780 781
  gimp_channel_resize (gimage->selection_mask,
		       new_width, new_height, offset_x, offset_y);
782 783 784
  gimage_mask_invalidate (gimage);

  /*  Reposition all layers  */
785 786 787
  for (list = GIMP_LIST (gimage->layers)->list; 
       list; 
       list = g_list_next (list))
788
    {
789
      layer = (GimpLayer *) list->data;
790

791
      gimp_layer_translate (layer, offset_x, offset_y);
792 793 794 795 796 797 798 799 800 801
    }

  /*  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]);
802

803
  gimp_remove_busy_cursors (NULL);
804 805 806
}

void
807
gimp_image_scale (GimpImage *gimage, 
808 809
		  gint       new_width, 
		  gint       new_height)
810
{
Michael Natterer's avatar
Michael Natterer committed
811 812 813
  GimpChannel *channel;
  GimpLayer   *layer;
  GimpLayer   *floating_layer;
814
  GList       *list;
Michael Natterer's avatar
Michael Natterer committed
815
  GSList      *remove = NULL;
816
  GSList      *slist;
Michael Natterer's avatar
Michael Natterer committed
817 818 819 820 821
  Guide       *guide;
  gint         old_width;
  gint         old_height;
  gdouble      img_scale_w = 1.0;
  gdouble      img_scale_h = 1.0;
822

823
  if ((new_width == 0) || (new_height == 0))
824
    {
825 826
      g_message ("%s(): Scaling to zero width or height has been rejected.",
		 G_GNUC_FUNCTION);
827 828
      return;
    }
829

830
  gimp_add_busy_cursors ();
831

832 833 834
  /*  Get the floating layer if one exists  */
  floating_layer = gimp_image_floating_sel (gimage);

Sven Neumann's avatar
Sven Neumann committed
835
  undo_push_group_start (gimage, IMAGE_SCALE_UNDO);
836 837 838 839 840 841 842 843 844

  /*  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  */
845 846 847

  old_width      = gimage->width;
  old_height     = gimage->height;
848
  gimage->width  = new_width;
849
  gimage->height = new_height;
850 851
  img_scale_w    = (gdouble) new_width  / (gdouble) old_width;
  img_scale_h    = (gdouble) new_height / (gdouble) old_height;
852
 
853
  /*  Scale all channels  */
854 855 856
  for (list = GIMP_LIST (gimage->channels)->list; 
       list; 
       list = g_list_next (list))
857
    {
Michael Natterer's avatar
Michael Natterer committed
858 859 860
      channel = (GimpChannel *) list->data;

      gimp_channel_scale (channel, new_width, new_height);
861 862 863
    }

  /*  Don't forget the selection mask!  */
864
  /*  if (channel_is_empty(gimage->selection_mask))
Michael Natterer's avatar
Michael Natterer committed
865
        gimp_channel_resize(gimage->selection_mask, new_width, new_height, 0, 0)
866 867 868
      else
  */
        
Michael Natterer's avatar
Michael Natterer committed
869
  gimp_channel_scale (gimage->selection_mask, new_width, new_height);
870 871 872
  gimage_mask_invalidate (gimage);

  /*  Scale all layers  */
873 874 875
  for (list = GIMP_LIST (gimage->layers)->list; 
       list; 
       list = g_list_next (list))
876
    {
877 878 879
      layer = (GimpLayer *) list->data;

      if (gimp_layer_scale_by_factors (layer, img_scale_w, img_scale_h) == FALSE)
880
	{
881 882 883 884 885
	  /* 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.
	   */
886

887
          remove = g_slist_append (remove, layer);
888 889 890 891 892
        }
    }
  /* We defer removing layers lost to scaling until now            */
  /* so as not to mix the operations of iterating over and removal */
  /* from gimage->layers.                                          */  
893

894
  for (slist = remove; slist; slist = g_slist_next (slist))
895
    {
896
      layer = slist->data;
897
      gimp_image_remove_layer (gimage, layer);
898
    }
899
  g_slist_free (remove);
900

901
  /*  Scale any Guides  */
902
  for (list = gimage->guides; list; list = g_list_next (list))
903
    {
904
      guide = (Guide*) list->data;
905 906 907

      switch (guide->orientation)
	{
908
	case ORIENTATION_HORIZONTAL:
Sven Neumann's avatar
Sven Neumann committed
909
	  undo_push_guide (gimage, guide);
910 911
	  guide->position = (guide->position * new_height) / old_height;
	  break;
912
	case ORIENTATION_VERTICAL:
Sven Neumann's avatar
Sven Neumann committed
913
	  undo_push_guide (gimage, guide);
914 915 916 917 918 919
	  guide->position = (guide->position * new_width) / old_width;
	  break;
	default:
	  g_error("Unknown guide orientation II.\n");
	}
    }
920

921 922 923 924 925 926 927 928
  /*  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]);
929

930
  gimp_remove_busy_cursors (NULL);
931 932 933
}

TileManager *
934
gimp_image_shadow (GimpImage *gimage, 
935 936 937
		   gint       width, 
		   gint       height, 
		   gint       bpp)
938 939
{
  if (gimage->shadow &&
940 941 942
      ((width != tile_manager_width (gimage->shadow)) ||
       (height != tile_manager_height (gimage->shadow)) ||
       (bpp != tile_manager_bpp (gimage->shadow))))
943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962
    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;
}

void
963 964 965 966 967 968
gimp_image_apply_image (GimpImage	 *gimage,
			GimpDrawable	 *drawable,
			PixelRegion	 *src2PR,
			gint              undo,
			gint              opacity,
			LayerModeEffects  mode,
969
			/*  alternative to using drawable tiles as src1: */
970 971 972
			TileManager	 *src1_tiles,
			gint              x,
			gint              y)
973
{
Michael Natterer's avatar
Michael Natterer committed
974
  GimpChannel *mask;
975 976 977 978 979
  gint         x1, y1, x2, y2;
  gint         offset_x, offset_y;
  PixelRegion  src1PR, destPR, maskPR;
  gint         operation;
  gint         active [MAX_CHANNELS];
980 981

  /*  get the selection mask if one exists  */
982
  mask = (gimage_mask_is_empty (gimage)) ? NULL : gimp_image_get_mask (gimage);
983 984 985 986 987 988 989

  /*  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...
   */
990
  operation = valid_combinations[gimp_drawable_type (drawable)][src2PR->bytes];
991 992
  if (operation == -1)
    {
993
      g_message ("%s(): illegal parameters", G_GNUC_FUNCTION);
994 995 996 997
      return;
    }

  /*  get the layer offsets  */
998
  gimp_drawable_offsets (drawable, &offset_x, &offset_y);
999 1000

  /*  make sure the image application coordinates are within gimage bounds  */
1001 1002 1003 1004
  x1 = CLAMP (x, 0, gimp_drawable_width  (drawable));
  y1 = CLAMP (y, 0, gimp_drawable_height (drawable));
  x2 = CLAMP (x + src2PR->w, 0, gimp_drawable_width  (drawable));
  y2 = CLAMP (y + src2PR->h, 0, gimp_drawable_height (drawable));
1005 1006 1007 1008 1009 1010 1011

  if (mask)
    {
      /*  make sure coordinates are in mask bounds ...
       *  we need to add the layer offset to transform coords
       *  into the mask coordinate system
       */
1012 1013 1014 1015
      x1 = CLAMP (x1, -offset_x, gimp_drawable_width (GIMP_DRAWABLE (mask))-offset_x);
      y1 = CLAMP (y1, -offset_y, gimp_drawable_height(GIMP_DRAWABLE (mask))-offset_y);
      x2 = CLAMP (x2, -offset_x, gimp_drawable_width (GIMP_DRAWABLE (mask))-offset_x);
      y2 = CLAMP (y2, -offset_y, gimp_drawable_height(GIMP_DRAWABLE (mask))-offset_y);
1016 1017 1018 1019
    }

  /*  If the calling procedure specified an undo step...  */
  if (undo)
1020
    undo_push_image (gimp_drawable_gimage (drawable), drawable, x1, y1, x2, y2);
1021 1022 1023 1024 1025

  /* configure the pixel regions
   *  If an alternative to using the drawable's data as src1 was provided...
   */
  if (src1_tiles)