gimpimage-resize.c 113 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
#include "libgimpbase/gimpbase.h"
28

Michael Natterer's avatar
Michael Natterer committed
29 30
#include "core-types.h"

Michael Natterer's avatar
Michael Natterer committed
31 32 33 34
#include "base/pixel-region.h"
#include "base/temp-buf.h"
#include "base/tile-manager.h"
#include "base/tile.h"
Sven Neumann's avatar
Sven Neumann committed
35

36 37
#include "paint-funcs/paint-funcs.h"

38
#include "gimp.h"
39
#include "gimpcontext.h"
Michael Natterer's avatar
Michael Natterer committed
40
#include "gimpcoreconfig.h"
41
#include "gimpimage.h"
Michael Natterer's avatar
Michael Natterer committed
42
#include "gimpimage-colorhash.h"
43
#include "gimpimage-mask.h"
44
#include "gimpimage-undo.h"
45
#include "gimplayer.h"
46
#include "gimplayermask.h"
47
#include "gimplist.h"
48
#include "gimpmarshal.h"
Manish Singh's avatar
Manish Singh committed
49
#include "gimpparasite.h"
50
#include "gimpparasitelist.h"
51
#include "gimpundostack.h"
52 53 54

#include "floating_sel.h"
#include "gdisplay.h"
55
#include "path.h"
56
#include "undo.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
static void     gimp_image_class_init            (GimpImageClass *klass);
static void     gimp_image_init                  (GimpImage      *gimage);
71 72 73 74

static void     gimp_image_dispose               (GObject        *object);
static void     gimp_image_finalize              (GObject        *object);

75 76
static void     gimp_image_name_changed          (GimpObject     *object);
static void     gimp_image_invalidate_preview    (GimpViewable   *viewable);
77
static void     gimp_image_size_changed          (GimpViewable   *viewable);
Michael Natterer's avatar
Michael Natterer committed
78 79
static void     gimp_image_real_colormap_changed (GimpImage      *gimage,
						  gint            ncol);
80
static TempBuf *gimp_image_get_preview           (GimpViewable   *gimage,
81 82
						  gint            width,
						  gint            height);
83
static TempBuf *gimp_image_get_new_preview       (GimpViewable   *viewable,
84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109
						  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);
110 111 112 113 114
static void     gimp_image_construct             (GimpImage      *gimage,
						  gint            x,
						  gint            y,
						  gint            w,
						  gint            h);
115 116

/*  projection functions  */
117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139
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);
140 141 142 143

/*
 *  Global variables
 */
144
static gint valid_combinations[][MAX_CHANNELS + 1] =
145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164
{
  /* 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 },
};


/*
 *  Static variables
 */

165 166
enum
{
167
  MODE_CHANGED,
168
  ALPHA_CHANGED,
169
  FLOATING_SELECTION_CHANGED,
170 171
  ACTIVE_LAYER_CHANGED,
  ACTIVE_CHANNEL_CHANGED,
172 173
  COMPONENT_VISIBILITY_CHANGED,
  COMPONENT_ACTIVE_CHANGED,
174
  MASK_CHANGED,
175

176
  CLEAN,
177
  DIRTY,
Michael Natterer's avatar
Michael Natterer committed
178
  UPDATE,
179
  COLORMAP_CHANGED,
180
  UNDO_EVENT,
181 182
  LAST_SIGNAL
};
183

184

185 186
static guint gimp_image_signals[LAST_SIGNAL] = { 0 };

187
static GimpViewableClass *parent_class = NULL;
188

189

190
GType 
191 192
gimp_image_get_type (void) 
{
193
  static GType image_type = 0;
194 195 196

  if (! image_type)
    {
197
      static const GTypeInfo image_info =
198 199
      {
        sizeof (GimpImageClass),
200 201 202 203 204 205 206 207
        NULL,           /* base_init */
        NULL,           /* base_finalize */
        (GClassInitFunc) gimp_image_class_init,
        NULL,           /* class_finalize */
        NULL,           /* class_data */
        sizeof (GimpImage),
        0,              /* n_preallocs */
        (GInstanceInitFunc) gimp_image_init,
208 209
      };

210 211 212
      image_type = g_type_register_static (GIMP_TYPE_VIEWABLE,
					   "GimpImage",
					   &image_info, 0);
213 214 215 216 217
    }

  return image_type;
}

218 219 220
static void
gimp_image_class_init (GimpImageClass *klass)
{
221
  GObjectClass      *object_class;
222 223
  GimpObjectClass   *gimp_object_class;
  GimpViewableClass *viewable_class;
224

225 226 227
  object_class      = G_OBJECT_CLASS (klass);
  gimp_object_class = GIMP_OBJECT_CLASS (klass);
  viewable_class    = GIMP_VIEWABLE_CLASS (klass);
228

229
  parent_class = g_type_class_peek_parent (klass);
230

231
  gimp_image_signals[MODE_CHANGED] =
232 233 234 235 236 237 238
    g_signal_new ("mode_changed",
		  G_TYPE_FROM_CLASS (klass),
		  G_SIGNAL_RUN_FIRST,
		  G_STRUCT_OFFSET (GimpImageClass, mode_changed),
		  NULL, NULL,
		  g_cclosure_marshal_VOID__VOID,
		  G_TYPE_NONE, 0);
239

240
  gimp_image_signals[ALPHA_CHANGED] =
241 242 243 244 245 246 247
    g_signal_new ("alpha_changed",
		  G_TYPE_FROM_CLASS (klass),
		  G_SIGNAL_RUN_FIRST,
		  G_STRUCT_OFFSET (GimpImageClass, alpha_changed),
		  NULL, NULL,
		  g_cclosure_marshal_VOID__VOID,
		  G_TYPE_NONE, 0);
248

249
  gimp_image_signals[FLOATING_SELECTION_CHANGED] =
250 251 252 253 254 255 256
    g_signal_new ("floating_selection_changed",
		  G_TYPE_FROM_CLASS (klass),
		  G_SIGNAL_RUN_FIRST,
		  G_STRUCT_OFFSET (GimpImageClass, floating_selection_changed),
		  NULL, NULL,
		  g_cclosure_marshal_VOID__VOID,
		  G_TYPE_NONE, 0);
257

258
  gimp_image_signals[ACTIVE_LAYER_CHANGED] =
259 260 261 262 263 264 265
    g_signal_new ("active_layer_changed",
		  G_TYPE_FROM_CLASS (klass),
		  G_SIGNAL_RUN_FIRST,
		  G_STRUCT_OFFSET (GimpImageClass, active_layer_changed),
		  NULL, NULL,
		  g_cclosure_marshal_VOID__VOID,
		  G_TYPE_NONE, 0);
266 267

  gimp_image_signals[ACTIVE_CHANNEL_CHANGED] =
268 269 270 271 272 273 274
    g_signal_new ("active_channel_changed",
		  G_TYPE_FROM_CLASS (klass),
		  G_SIGNAL_RUN_FIRST,
		  G_STRUCT_OFFSET (GimpImageClass, active_channel_changed),
		  NULL, NULL,
		  g_cclosure_marshal_VOID__VOID,
		  G_TYPE_NONE, 0);
275

276
  gimp_image_signals[COMPONENT_VISIBILITY_CHANGED] =
277 278 279 280 281 282 283 284
    g_signal_new ("component_visibility_changed",
		  G_TYPE_FROM_CLASS (klass),
		  G_SIGNAL_RUN_FIRST,
		  G_STRUCT_OFFSET (GimpImageClass, component_visibility_changed),
		  NULL, NULL,
		  g_cclosure_marshal_VOID__INT,
		  G_TYPE_NONE, 1,
		  G_TYPE_INT);
285 286

  gimp_image_signals[COMPONENT_ACTIVE_CHANGED] =
287 288 289 290 291 292 293 294
    g_signal_new ("component_active_changed",
		  G_TYPE_FROM_CLASS (klass),
		  G_SIGNAL_RUN_FIRST,
		  G_STRUCT_OFFSET (GimpImageClass, component_active_changed),
		  NULL, NULL,
		  g_cclosure_marshal_VOID__INT,
		  G_TYPE_NONE, 1,
		  G_TYPE_INT);
295

296
  gimp_image_signals[MASK_CHANGED] =
297 298 299 300 301 302 303
    g_signal_new ("mask_changed",
		  G_TYPE_FROM_CLASS (klass),
		  G_SIGNAL_RUN_FIRST,
		  G_STRUCT_OFFSET (GimpImageClass, mask_changed),
		  NULL, NULL,
		  g_cclosure_marshal_VOID__VOID,
		  G_TYPE_NONE, 0);
304

305
  gimp_image_signals[CLEAN] =
306 307 308 309 310 311 312
    g_signal_new ("clean",
		  G_TYPE_FROM_CLASS (klass),
		  G_SIGNAL_RUN_FIRST,
		  G_STRUCT_OFFSET (GimpImageClass, clean),
		  NULL, NULL,
		  g_cclosure_marshal_VOID__VOID,
		  G_TYPE_NONE, 0);
313

314
  gimp_image_signals[DIRTY] =
315 316 317 318 319 320 321
    g_signal_new ("dirty",
		  G_TYPE_FROM_CLASS (klass),
		  G_SIGNAL_RUN_FIRST,
		  G_STRUCT_OFFSET (GimpImageClass, dirty),
		  NULL, NULL,
		  g_cclosure_marshal_VOID__VOID,
		  G_TYPE_NONE, 0);
322

Michael Natterer's avatar
Michael Natterer committed
323
  gimp_image_signals[UPDATE] =
324 325 326 327 328 329 330 331 332 333 334
    g_signal_new ("update",
		  G_TYPE_FROM_CLASS (klass),
		  G_SIGNAL_RUN_FIRST,
		  G_STRUCT_OFFSET (GimpImageClass, update),
		  NULL, NULL,
		  gimp_cclosure_marshal_VOID__INT_INT_INT_INT,
		  G_TYPE_NONE, 4,
		  G_TYPE_INT,
		  G_TYPE_INT,
		  G_TYPE_INT,
		  G_TYPE_INT);
335

336
  gimp_image_signals[COLORMAP_CHANGED] =
337 338 339 340 341 342 343 344
    g_signal_new ("colormap_changed",
		  G_TYPE_FROM_CLASS (klass),
		  G_SIGNAL_RUN_FIRST,
		  G_STRUCT_OFFSET (GimpImageClass, colormap_changed),
		  NULL, NULL,
		  g_cclosure_marshal_VOID__INT,
		  G_TYPE_NONE, 1,
		  G_TYPE_INT);
345

346
  gimp_image_signals[UNDO_EVENT] = 
347 348 349 350 351 352 353 354
    g_signal_new ("undo_event",
		  G_TYPE_FROM_CLASS (klass),
		  G_SIGNAL_RUN_FIRST,
		  G_STRUCT_OFFSET (GimpImageClass, undo_event),
		  NULL, NULL,
		  g_cclosure_marshal_VOID__INT,
		  G_TYPE_NONE, 1,
		  G_TYPE_INT);
355

356 357
  object_class->dispose               = gimp_image_dispose;
  object_class->finalize              = gimp_image_finalize;
358

359
  gimp_object_class->name_changed     = gimp_image_name_changed;
360

361
  viewable_class->invalidate_preview  = gimp_image_invalidate_preview;
362
  viewable_class->size_changed        = gimp_image_size_changed;
363 364
  viewable_class->get_preview         = gimp_image_get_preview;
  viewable_class->get_new_preview     = gimp_image_get_new_preview;
365

366
  klass->mode_changed                 = NULL;
367
  klass->alpha_changed                = NULL;
368
  klass->floating_selection_changed   = NULL;
369 370 371 372
  klass->active_layer_changed         = NULL;
  klass->active_channel_changed       = NULL;
  klass->component_visibility_changed = NULL;
  klass->component_active_changed     = NULL;
373
  klass->mask_changed                 = NULL;
374

375 376
  klass->clean                        = NULL;
  klass->dirty                        = NULL;
Michael Natterer's avatar
Michael Natterer committed
377
  klass->update                       = NULL;
Michael Natterer's avatar
Michael Natterer committed
378
  klass->colormap_changed             = gimp_image_real_colormap_changed;
379 380 381
  klass->undo_event                   = NULL;
  klass->undo                         = gimp_image_undo;
  klass->redo                         = gimp_image_redo;
Michael Natterer's avatar
Michael Natterer committed
382 383

  gimp_image_color_hash_init ();
384 385 386 387 388
}


/* static functions */

Sven Neumann's avatar
Sven Neumann committed
389 390
static void 
gimp_image_init (GimpImage *gimage)
391
{
392
  gimage->ID                    = 0;
393

394 395 396 397
  gimage->save_proc             = NULL;

  gimage->width                 = 0;
  gimage->height                = 0;
398 399 400
  gimage->xresolution           = 1.0;
  gimage->yresolution           = 1.0;
  gimage->unit                  = GIMP_UNIT_INCH;
401 402
  gimage->base_type             = RGB;

403
  gimage->cmap                  = NULL;
404 405
  gimage->num_cols              = 0;

406
  gimage->dirty                 = 1;
407
  gimage->undo_on               = TRUE;
408 409 410 411

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

412
  gimage->tattoo_state          = 0;
413 414 415 416 417

  gimage->shadow                = NULL;

  gimage->construct_flag        = -1;
  gimage->proj_type             = RGBA_GIMAGE;
418
  gimage->projection            = NULL;
419

420
  gimage->guides                = NULL;
421

422 423 424 425
  gimage->layers                = gimp_list_new (GIMP_TYPE_LAYER, 
						 GIMP_CONTAINER_POLICY_STRONG);
  gimage->channels              = gimp_list_new (GIMP_TYPE_CHANNEL, 
						 GIMP_CONTAINER_POLICY_STRONG);
426
  gimage->layer_stack           = NULL;
427 428 429 430 431 432

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

433
  gimage->parasites             = gimp_parasite_list_new ();
434 435 436 437 438 439 440 441 442

  gimage->paths                 = NULL;

  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;

443 444 445 446
  gimage->undo_stack            = NULL;
  gimage->redo_stack            = NULL;
  gimage->undo_bytes            = 0;
  gimage->undo_levels           = 0;
447
  gimage->group_count           = 0;
448
  gimage->pushing_undo_group    = UNDO_NULL;
449

450 451 452
  gimage->new_undo_stack        = gimp_undo_stack_new (gimage);
  gimage->new_redo_stack        = gimp_undo_stack_new (gimage);

453
  gimage->comp_preview          = NULL;
454
  gimage->comp_preview_valid    = FALSE;
455 456
}

457
static void
458 459 460 461 462 463 464 465 466 467 468 469 470
gimp_image_dispose (GObject *object)
{
  GimpImage *gimage;

  gimage = GIMP_IMAGE (object);

  undo_free (gimage);

  G_OBJECT_CLASS (parent_class)->dispose (object);
}

static void
gimp_image_finalize (GObject *object)
Sven Neumann's avatar
Sven Neumann committed
471
{
472 473 474 475
  GimpImage *gimage;

  gimage = GIMP_IMAGE (object);

476 477 478 479 480 481 482 483 484 485 486 487
  if (gimage->gimp && gimage->gimp->image_table)
    {
      g_hash_table_remove (gimage->gimp->image_table,
			   GINT_TO_POINTER (gimage->ID));
      gimage->gimp = NULL;
    }

  if (gimage->projection)
    gimp_image_free_projection (gimage);

  if (gimage->shadow)
    gimp_image_free_shadow (gimage);
488

489
  if (gimage->cmap)
490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509
    {
      g_free (gimage->cmap);
      gimage->cmap = NULL;
    }

  if (gimage->layers)
    {
      g_object_unref (G_OBJECT (gimage->layers));
      gimage->layers = NULL;
    }
  if (gimage->channels)
    {
      g_object_unref (G_OBJECT (gimage->channels));
      gimage->channels = NULL;
    }
  if (gimage->layer_stack)
    {
      g_slist_free (gimage->layer_stack);
      gimage->layer_stack = NULL;
    }
510

511 512 513 514 515
  if (gimage->selection_mask)
    {
      g_object_unref (G_OBJECT (gimage->selection_mask));
      gimage->selection_mask = NULL;
    }
516

517
  if (gimage->comp_preview)
518 519 520 521
    {
      temp_buf_free (gimage->comp_preview);
      gimage->comp_preview = NULL;
    }
522 523

  if (gimage->parasites)
524 525 526 527
    {
      g_object_unref (G_OBJECT (gimage->parasites));
      gimage->parasites = NULL;
    }
528

529 530 531 532 533 534
  if (gimage->guides)
    {
      g_list_foreach (gimage->guides, (GFunc) g_free, NULL);
      g_list_free (gimage->guides);
      gimage->guides = NULL;
    }
Michael Natterer's avatar
Michael Natterer committed
535

536 537 538 539 540 541 542 543 544 545 546
  if (gimage->new_undo_stack)
    {
      g_object_unref (G_OBJECT (gimage->new_undo_stack));
      gimage->new_undo_stack = NULL;
    }
  if (gimage->new_redo_stack)
    {
      g_object_unref (G_OBJECT (gimage->new_redo_stack));
      gimage->new_redo_stack = NULL;
    }

547
  G_OBJECT_CLASS (parent_class)->finalize (object);
548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565
}

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;
566
    }
567
}
568

569 570 571 572 573
static void
gimp_image_invalidate_preview (GimpViewable *viewable)
{
  GimpImage *gimage;

574 575 576
  if (GIMP_VIEWABLE_CLASS (parent_class)->invalidate_preview)
    GIMP_VIEWABLE_CLASS (parent_class)->invalidate_preview (viewable);

577 578 579
  gimage = GIMP_IMAGE (viewable);

  gimage->comp_preview_valid = FALSE;
580 581
}

582 583 584 585 586 587 588 589 590 591 592 593 594 595
static void
gimp_image_size_changed (GimpViewable *viewable)
{
  GimpImage *gimage;

  if (GIMP_VIEWABLE_CLASS (parent_class)->size_changed)
    GIMP_VIEWABLE_CLASS (parent_class)->size_changed (viewable);

  gimage = GIMP_IMAGE (viewable);

  gimp_image_invalidate_layer_previews (gimage);
  gimp_image_invalidate_channel_previews (gimage);
}

Michael Natterer's avatar
Michael Natterer committed
596 597 598 599 600 601 602 603
static void 
gimp_image_real_colormap_changed (GimpImage *gimage,
				  gint       ncol)
{
  if (gimp_image_base_type (gimage) == INDEXED)
    gimp_image_color_hash_invalidate (gimage, ncol);
}

604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625
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:
626
      g_assert_not_reached ();
627 628 629
    }

  /*  allocate the new projection  */
630 631
  gimage->projection = tile_manager_new (gimage->width, gimage->height,
					 gimage->proj_bytes);
632
  tile_manager_set_user_data (gimage->projection, (void *) gimage);
633 634 635 636 637 638
  tile_manager_set_validate_proc (gimage->projection, gimp_image_validate);
}

static void
gimp_image_free_projection (GimpImage *gimage)
{
639
  g_return_if_fail (GIMP_IS_IMAGE (gimage));
640

641 642 643 644 645
  if (gimage->projection)
    {
      tile_manager_destroy (gimage->projection);
      gimage->projection = NULL;
    }
646 647 648
}

static void
Sven Neumann's avatar
Sven Neumann committed
649
gimp_image_allocate_shadow (GimpImage *gimage, 
650 651 652
			    gint       width, 
			    gint       height, 
			    gint       bpp)
653 654 655 656 657 658 659 660 661
{
  /*  allocate the new projection  */
  gimage->shadow = tile_manager_new (width, height, bpp);
}


/* function definitions */

GimpImage *
662 663
gimp_image_new (Gimp              *gimp,
		gint               width,
664 665
		gint               height,
		GimpImageBaseType  base_type)
666
{
667 668 669 670 671
  GimpImage *gimage;
  gint       i;

  g_return_val_if_fail (GIMP_IS_GIMP (gimp), NULL);

Michael Natterer's avatar
Michael Natterer committed
672
  gimage = GIMP_IMAGE (g_object_new (GIMP_TYPE_IMAGE, NULL));
673

674 675 676 677 678 679 680 681 682 683 684 685 686 687
  gimage->gimp        = gimp;
  gimage->ID          = gimp->next_image_ID++;

  g_hash_table_insert (gimp->image_table,
		       GINT_TO_POINTER (gimage->ID),
		       (gpointer) gimage);

  gimage->width       = width;
  gimage->height      = height;
  gimage->base_type   = base_type;

  gimage->xresolution = gimp->config->default_xresolution;
  gimage->yresolution = gimp->config->default_yresolution;
  gimage->unit        = gimp->config->default_units;
688 689 690 691 692 693 694 695 696

  switch (base_type)
    {
    case RGB:
    case GRAY:
      break;
    case INDEXED:
      /* always allocate 256 colors for the colormap */
      gimage->num_cols = 0;
697
      gimage->cmap     = (guchar *) g_malloc0 (COLORMAP_SIZE);
698 699 700 701 702 703 704 705
      break;
    default:
      break;
    }

  /*  set all color channels visible and active  */
  for (i = 0; i < MAX_CHANNELS; i++)
    {
706 707
      gimage->visible[i] = TRUE;
      gimage->active[i]  = TRUE;
708 709 710
    }

  /* create the selection mask */
Michael Natterer's avatar
Michael Natterer committed
711 712 713
  gimage->selection_mask = gimp_channel_new_mask (gimage,
						  gimage->width,
						  gimage->height);
714 715 716 717 718


  return gimage;
}

719 720 721 722 723 724 725 726 727
gint
gimp_image_get_ID (GimpImage *gimage)
{
  g_return_val_if_fail (GIMP_IS_IMAGE (gimage), -1);

  return gimage->ID;
}

GimpImage *
728 729
gimp_image_get_by_ID (Gimp *gimp,
		      gint  image_id)
730
{
731 732 733
  g_return_val_if_fail (GIMP_IS_GIMP (gimp), NULL);

  if (gimp->image_table == NULL)
734 735
    return NULL;

736
  return (GimpImage *) g_hash_table_lookup (gimp->image_table, 
737 738 739
					    GINT_TO_POINTER (image_id));
}

740
void
741 742
gimp_image_set_filename (GimpImage   *gimage,
			 const gchar *filename)
743
{
744 745
  g_return_if_fail (GIMP_IS_IMAGE (gimage));

746 747
  gimp_object_set_name (GIMP_OBJECT (gimage), filename);
}
748

749
void
750
gimp_image_set_resolution (GimpImage *gimage,
751 752
			   gdouble    xresolution,
			   gdouble    yresolution)
753
{
754 755
  g_return_if_fail (GIMP_IS_IMAGE (gimage));

756 757 758 759 760
  /* 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;

761 762 763
  /* 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)
764 765
    return;

766
  undo_push_resolution (gimage);
767

768 769
  gimage->xresolution = xresolution;
  gimage->yresolution = yresolution;
770 771 772

  /* really just want to recalc size and repaint */
  gdisplays_shrink_wrap (gimage);
773 774
}

775
void
776 777 778
gimp_image_get_resolution (const GimpImage *gimage,
			   gdouble         *xresolution,
			   gdouble         *yresolution)
779
{
780
  g_return_if_fail (GIMP_IS_IMAGE (gimage));
781 782
  g_return_if_fail (xresolution && yresolution);

783 784
  *xresolution = gimage->xresolution;
  *yresolution = gimage->yresolution;
785 786
}

787 788
void
gimp_image_set_unit (GimpImage *gimage,
789
		     GimpUnit   unit)
790
{
791 792
  g_return_if_fail (GIMP_IS_IMAGE (gimage));

793 794
  undo_push_resolution (gimage);

795 796 797
  gimage->unit = unit;
}

798
GimpUnit
799
gimp_image_get_unit (const GimpImage *gimage)
800
{
801 802
  g_return_val_if_fail (GIMP_IS_IMAGE (gimage), GIMP_UNIT_INCH);

803 804 805
  return gimage->unit;
}

806
void
Sven Neumann's avatar
Sven Neumann committed
807 808
gimp_image_set_save_proc (GimpImage     *gimage, 
			  PlugInProcDef *proc)
809
{
810 811
  g_return_if_fail (GIMP_IS_IMAGE (gimage));

812 813 814 815
  gimage->save_proc = proc;
}

PlugInProcDef *
816
gimp_image_get_save_proc (const GimpImage *gimage)
817
{
818 819
  g_return_val_if_fail (GIMP_IS_IMAGE (gimage), NULL);

820 821
  return gimage->save_proc;
}
822

823 824 825
gint
gimp_image_get_width (const GimpImage *gimage)
{
826 827
  g_return_val_if_fail (GIMP_IS_IMAGE (gimage), 0);

828 829 830 831 832 833
  return gimage->width;
}

gint
gimp_image_get_height (const GimpImage *gimage)
{
834 835
  g_return_val_if_fail (GIMP_IS_IMAGE (gimage), 0);

836 837 838
  return gimage->height;
}

839
void
840
gimp_image_resize (GimpImage *gimage, 
841 842 843 844
		   gint       new_width, 
		   gint       new_height,
		   gint       offset_x, 
		   gint       offset_y)
845
{
Michael Natterer's avatar
Michael Natterer committed
846 847 848
  GimpChannel *channel;
  GimpLayer   *layer;
  GimpLayer   *floating_layer;
849
  GList       *list;
Michael Natterer's avatar
Michael Natterer committed
850
  GList       *guide_list;
851

852 853
  g_return_if_fail (GIMP_IS_IMAGE (gimage));
  g_return_if_fail (new_width > 0 && new_height > 0);
854

855
  gimp_set_busy (gimage->gimp);
856 857 858 859

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

Sven Neumann's avatar
Sven Neumann committed
860
  undo_push_group_start (gimage, IMAGE_RESIZE_UNDO);
861 862 863 864 865 866 867 868 869

  /*  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  */
870
  gimage->width  = new_width;
871 872 873
  gimage->height = new_height;

  /*  Resize all channels  */
874 875 876
  for (list = GIMP_LIST (gimage->channels)->list; 
       list; 
       list = g_list_next (list))
877
    {
Michael Natterer's avatar
Michael Natterer committed
878
      channel = (GimpChannel *) list->data;
879

Michael Natterer's avatar
Michael Natterer committed
880
      gimp_channel_resize (channel, new_width, new_height, offset_x, offset_y);
881 882 883 884 885 886
    }

  /*  Reposition or remove any guides  */
  guide_list = gimage->guides;
  while (guide_list)
    {
Michael Natterer's avatar
Michael Natterer committed
887
      GimpGuide *guide;
888

Michael Natterer's avatar
Michael Natterer committed
889
      guide = (GimpGuide *) guide_list->data;
Sven Neumann's avatar
Sven Neumann committed
890
      guide_list = g_list_next (guide_list);
891 892 893

      switch (guide->orientation)
	{
894
	case ORIENTATION_HORIZONTAL:
Sven Neumann's avatar
Sven Neumann committed
895
	  undo_push_guide (gimage, guide);
896 897 898 899
	  guide->position += offset_y;
	  if (guide->position < 0 || guide->position > new_height)
	    gimp_image_delete_guide (gimage, guide);
	  break;
900

901
	case ORIENTATION_VERTICAL:
Sven Neumann's avatar
Sven Neumann committed
902
	  undo_push_guide (gimage, guide);
903 904 905 906
	  guide->position += offset_x;
	  if (guide->position < 0 || guide->position > new_width)
	    gimp_image_delete_guide (gimage, guide);
	  break;
907

908
	default:
909
	  g_error ("Unknown guide orientation\n");
910
	}
911 912 913
    }

  /*  Don't forget the selection mask!  */
Michael Natterer's avatar
Michael Natterer committed
914 915
  gimp_channel_resize (gimage->selection_mask,
		       new_width, new_height, offset_x, offset_y);
916 917 918
  gimage_mask_invalidate (gimage);

  /*  Reposition all layers  */
919 920 921
  for (list = GIMP_LIST (gimage->layers)->list; 
       list; 
       list = g_list_next (list))
922
    {
923
      layer = (GimpLayer *) list->data;
924

925
      gimp_layer_translate (layer, offset_x, offset_y);
926 927 928 929 930 931 932 933 934
    }

  /*  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);

935 936
  undo_push_group_end (gimage);

937
  gimp_viewable_size_changed (GIMP_VIEWABLE (gimage));
938

939
  gimp_unset_busy (gimage->gimp);
940 941 942
}

void
943
gimp_image_scale (GimpImage *gimage, 
944 945
		  gint       new_width, 
		  gint       new_height)
946
{
Michael Natterer's avatar
Michael Natterer committed
947 948 949
  GimpChannel *channel;
  GimpLayer   *layer;
  GimpLayer   *floating_layer;
950
  GList       *list;
Michael Natterer's avatar
Michael Natterer committed
951
  GSList      *remove = NULL;
952
  GSList      *slist;
Michael Natterer's avatar
Michael Natterer committed
953
  GimpGuide   *guide;
Michael Natterer's avatar
Michael Natterer committed
954 955 956 957
  gint         old_width;
  gint         old_height;
  gdouble      img_scale_w = 1.0;
  gdouble      img_scale_h = 1.0;
958

959 960
  g_return_if_fail (GIMP_IS_IMAGE (gimage));
  g_return_if_fail (new_width > 0 && new_height > 0);
961

962
  gimp_set_busy (gimage->gimp);
963