gimpimage-resize.c 90.4 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 "pathsP.h"
34
#include "gimprc.h"
35

36 37
#include "libgimp/gimpintl.h"

scott's avatar
scott committed
38 39
#include "tile_manager.h"
#include "tile.h"
40 41 42
#include "layer_pvt.h"
#include "drawable_pvt.h"		/* ick ick. */

43

44 45 46 47 48 49 50
#ifdef DEBUG
#define TRC(x) printf x
#else
#define TRC(x)
#endif


51 52
/*  Local function declarations  */
static void     gimp_image_free_projection       (GimpImage *);
53
static void     gimp_image_allocate_shadow       (GimpImage *, gint, gint, gint);
54 55 56
static void     gimp_image_allocate_projection   (GimpImage *);
static void     gimp_image_free_layers           (GimpImage *);
static void     gimp_image_free_channels         (GimpImage *);
57 58 59 60
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 *);
61 62

/*  projection functions  */
63 64
static void     project_intensity            (GimpImage *, Layer *,
					      PixelRegion *, PixelRegion *,
65
					      PixelRegion *);
66 67
static void     project_intensity_alpha      (GimpImage *, Layer *,
					      PixelRegion *, PixelRegion *,
68
					      PixelRegion *);
69 70 71 72
static void     project_indexed              (GimpImage *, Layer *,
					      PixelRegion *, PixelRegion *);
static void     project_channel              (GimpImage *, Channel *,
					      PixelRegion *, PixelRegion *);
73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92

/*
 *  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 },
};

93
guint32 next_guide_id = 1;  /* For generating guide_ID handles for PDB stuff */
94

95 96 97 98 99

/*
 *  Static variables
 */

100
enum {
101
  CLEAN,
102 103 104 105 106
  DIRTY,
  REPAINT,
  RENAME,
  RESIZE,
  RESTRUCTURE,
107
  COLORMAP_CHANGED,
108
  UNDO_EVENT,
109 110
  LAST_SIGNAL
};
111 112

static void  gimp_image_destroy (GtkObject *);
113 114

static guint gimp_image_signals[LAST_SIGNAL];
115
static GimpObjectClass *parent_class;
116 117 118 119 120 121 122 123 124 125 126 127 128 129

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;

130 131 132
  gimp_image_signals[CLEAN] =
	  gimp_signal_new ("clean", GTK_RUN_FIRST, type, 0,
			   gimp_sigtype_void);
133
  gimp_image_signals[DIRTY] =
134 135
	  gimp_signal_new ("dirty", GTK_RUN_FIRST, type, 0,
			   gimp_sigtype_void);
136
  gimp_image_signals[REPAINT] =
137 138
	  gimp_signal_new ("repaint", GTK_RUN_FIRST, type, 0,
			   gimp_sigtype_int_int_int_int);
139
  gimp_image_signals[RENAME] =
140 141
	  gimp_signal_new ("rename", GTK_RUN_FIRST, type, 0,
			   gimp_sigtype_void);
142
  gimp_image_signals[RESIZE] =
143 144
	  gimp_signal_new ("resize", GTK_RUN_FIRST, type, 0,
			   gimp_sigtype_void);
145
  gimp_image_signals[RESTRUCTURE] =
146 147
	  gimp_signal_new ("restructure", GTK_RUN_FIRST, type, 0,
			   gimp_sigtype_void);
148
  gimp_image_signals[COLORMAP_CHANGED] =
149 150
	  gimp_signal_new ("colormap_changed", GTK_RUN_FIRST, type, 0,
			   gimp_sigtype_int);
151 152 153
  gimp_image_signals[UNDO_EVENT] = 
	  gimp_signal_new ("undo_event", GTK_RUN_FIRST, type, 0,
			   gimp_sigtype_int);
154 155 156 157 158 159 160
  
  gtk_object_class_add_signals (object_class, gimp_image_signals, LAST_SIGNAL);
}


/* static functions */

Sven Neumann's avatar
Sven Neumann committed
161 162
static void 
gimp_image_init (GimpImage *gimage)
163
{
164 165 166
  gimage->has_filename          = FALSE;
  gimage->num_cols              = 0;
  gimage->cmap                  = NULL;
167
  /* ID and ref_count handled in gimage.c */
168 169 170 171 172 173 174 175 176 177 178 179 180 181 182
  gimage->instance_count        = 0;
  gimage->shadow                = NULL;
  gimage->dirty                 = 1;
  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;
183
  gimage->group_count           = 0;
184
  gimage->pushing_undo_group    = 0;
185 186 187
  gimage->comp_preview_valid[0] = FALSE;
  gimage->comp_preview_valid[1] = FALSE;
  gimage->comp_preview_valid[2] = FALSE;
188 189 190 191 192 193 194
  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;
195 196
}

Sven Neumann's avatar
Sven Neumann committed
197 198 199 200 201
GtkType 
gimp_image_get_type (void) 
{
  static GtkType type;

202 203 204 205 206 207
  GIMP_TYPE_INIT (type,
		  GimpImage,
		  GimpImageClass,
		  gimp_image_init,
		  gimp_image_class_init,
		  GIMP_TYPE_OBJECT);
Sven Neumann's avatar
Sven Neumann committed
208
  return type;
209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232
}

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:
233
      g_assert_not_reached ();
234 235 236 237
    }

  /*  allocate the new projection  */
  gimage->projection = tile_manager_new (gimage->width, gimage->height, gimage->proj_bytes);
238
  tile_manager_set_user_data (gimage->projection, (void *) gimage);
239 240 241 242 243 244 245 246 247 248 249 250 251
  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
252
gimp_image_allocate_shadow (GimpImage *gimage, 
253 254 255
			    gint       width, 
			    gint       height, 
			    gint       bpp)
256 257 258 259 260 261 262 263 264
{
  /*  allocate the new projection  */
  gimage->shadow = tile_manager_new (width, height, bpp);
}


/* function definitions */

GimpImage *
265 266 267
gimp_image_new (gint               width,
		gint               height,
		GimpImageBaseType  base_type)
268
{
269 270
  GimpImage *gimage = GIMP_IMAGE (gtk_type_new (gimp_image_get_type ()));
  gint i;
271

272 273 274
  gimage->filename  = NULL;
  gimage->width     = width;
  gimage->height    = height;
275 276 277 278 279 280 281 282 283 284
  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;
285
      gimage->cmap     = (guchar *) g_malloc0 (COLORMAP_SIZE);
286 287 288 289 290 291
      break;
    default:
      break;
    }

  /*  configure the active pointers  */
292
  gimage->active_layer   = NULL;
293
  gimage->active_channel = NULL;  /* no default active channel */
294
  gimage->floating_sel   = NULL;
295 296 297 298

  /*  set all color channels visible and active  */
  for (i = 0; i < MAX_CHANNELS; i++)
    {
299 300
      gimage->visible[i] = TRUE;
      gimage->active[i]  = TRUE;
301 302 303
    }

  /* create the selection mask */
304 305
  gimage->selection_mask = channel_new_mask (gimage,
					     gimage->width, gimage->height);
306

307
  /* set the qmask properties */
308 309
  gimage->qmask_state    = FALSE;
  gimage->qmask_opacity  = 50;
310 311 312
  gimage->qmask_color[0] = 255; 
  gimage->qmask_color[1] = 0; 
  gimage->qmask_color[2] = 0; 
313 314 315 316 317

  return gimage;
}

void
318
gimp_image_set_filename (GimpImage *gimage, 
319
			 gchar     *filename)
320
{
321 322
  gchar *new_filename, *old_filename;
  gboolean free_old;
323

324 325 326 327 328 329
  /* 
   * 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.
   */

330
  new_filename = g_strdup (filename);
331 332
  old_filename = gimage->filename;
  free_old = gimage->has_filename;
333 334 335 336 337 338 339 340 341 342 343 344

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

345 346 347
  if (free_old)
    g_free (old_filename);

348 349 350
  gtk_signal_emit (GTK_OBJECT (gimage), gimp_image_signals[RENAME]);
}

351
void
352
gimp_image_set_resolution (GimpImage *gimage,
353 354
			   gdouble    xresolution,
			   gdouble    yresolution)
355
{
356 357 358 359 360
  /* 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;

361
  undo_push_resolution (gimage);
362

363 364
  gimage->xresolution = xresolution;
  gimage->yresolution = yresolution;
365 366 367

  /* really just want to recalc size and repaint */
  gdisplays_shrink_wrap (gimage);
368 369
}

370 371
void
gimp_image_get_resolution (GimpImage *gimage,
372 373
			   gdouble   *xresolution,
			   gdouble   *yresolution)
374
{
375 376
  g_return_if_fail (xresolution && yresolution);

377 378
  *xresolution = gimage->xresolution;
  *yresolution = gimage->yresolution;
379 380
}

381 382
void
gimp_image_set_unit (GimpImage *gimage,
Sven Neumann's avatar
Sven Neumann committed
383
		     GUnit      unit)
384
{
385 386
  undo_push_resolution (gimage);

387 388 389 390 391 392 393 394 395
  gimage->unit = unit;
}

GUnit
gimp_image_get_unit (GimpImage *gimage)
{
  return gimage->unit;
}

396
void
Sven Neumann's avatar
Sven Neumann committed
397 398
gimp_image_set_save_proc (GimpImage     *gimage, 
			  PlugInProcDef *proc)
399 400 401 402 403 404 405 406 407
{
  gimage->save_proc = proc;
}

PlugInProcDef *
gimp_image_get_save_proc (GimpImage *gimage)
{
  return gimage->save_proc;
}
408

409
void
410
gimp_image_resize (GimpImage *gimage, 
411 412 413 414
		   gint       new_width, 
		   gint       new_height,
		   gint       offset_x, 
		   gint       offset_y)
415 416
{
  Channel *channel;
417 418 419 420
  Layer   *layer;
  Layer   *floating_layer;
  GSList  *list;
  GList   *guide_list;
421

422 423
  gimp_add_busy_cursors();

424
  g_assert (new_width > 0 && new_height > 0);
425 426 427 428

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

Sven Neumann's avatar
Sven Neumann committed
429
  undo_push_group_start (gimage, IMAGE_RESIZE_UNDO);
430 431 432 433 434 435 436 437 438

  /*  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  */
439
  gimage->width  = new_width;
440 441 442 443 444 445 446 447 448
  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);
449 450 451 452 453 454 455 456 457 458

    }

  /*  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
459
      guide_list = g_list_next (guide_list);
460 461 462

      switch (guide->orientation)
	{
463
	case ORIENTATION_HORIZONTAL:
Sven Neumann's avatar
Sven Neumann committed
464
	  undo_push_guide (gimage, guide);
465 466 467 468
	  guide->position += offset_y;
	  if (guide->position < 0 || guide->position > new_height)
	    gimp_image_delete_guide (gimage, guide);
	  break;
469
	case ORIENTATION_VERTICAL:
Sven Neumann's avatar
Sven Neumann committed
470
	  undo_push_guide (gimage, guide);
471 472 473 474 475 476 477
	  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");
	}
478 479 480
    }

  /*  Don't forget the selection mask!  */
481 482
  channel_resize (gimage->selection_mask,
		  new_width, new_height, offset_x, offset_y);
483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501
  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]);
502

503
  gimp_remove_busy_cursors (NULL);
504 505
}

506 507 508 509 510 511 512 513 514 515 516 517
gint
gimp_image_get_width (const GimpImage *gimage)
{
  return gimage->width;
}

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

518
void
519
gimp_image_scale (GimpImage *gimage, 
520 521
		  gint       new_width, 
		  gint       new_height)
522 523
{
  Channel *channel;
Sven Neumann's avatar
Sven Neumann committed
524 525 526 527 528
  Layer   *layer;
  Layer   *floating_layer;
  GSList  *list;
  GList   *glist;
  Guide   *guide;
529 530
  gint old_width, old_height;
  gint layer_width, layer_height;
531

532
  gimp_add_busy_cursors ();
533

534 535 536
  /*  Get the floating layer if one exists  */
  floating_layer = gimp_image_floating_sel (gimage);

Sven Neumann's avatar
Sven Neumann committed
537
  undo_push_group_start (gimage, IMAGE_SCALE_UNDO);
538 539 540 541 542 543 544 545 546

  /*  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  */
547
  old_width  = gimage->width;
548
  old_height = gimage->height;
549
  gimage->width  = new_width;
550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570
  gimage->height = new_height;

  /*  Scale all channels  */
  list = gimage->channels;
  while (list)
    {
      channel = (Channel *) list->data;
      channel_scale (channel, new_width, new_height);
      list = g_slist_next (list);
    }

  /*  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;
  while (list)
    {
      layer = (Layer *) list->data;

571 572 573 574
      layer_width  = (new_width *
		      drawable_width (GIMP_DRAWABLE(layer))) / old_width;
      layer_height = (new_height *
		      drawable_height (GIMP_DRAWABLE(layer))) / old_height;
575 576 577 578
      layer_scale (layer, layer_width, layer_height, FALSE);
      list = g_slist_next (list);
    }

579 580 581 582 583 584 585 586 587
  /*  Scale any Guides  */
  glist = gimage->guides;
  while (glist)
    {
      guide = (Guide*) glist->data;
      glist = g_list_next (glist);

      switch (guide->orientation)
	{
588
	case ORIENTATION_HORIZONTAL:
Sven Neumann's avatar
Sven Neumann committed
589
	  undo_push_guide (gimage, guide);
590 591
	  guide->position = (guide->position * new_height) / old_height;
	  break;
592
	case ORIENTATION_VERTICAL:
Sven Neumann's avatar
Sven Neumann committed
593
	  undo_push_guide (gimage, guide);
594 595 596 597 598 599
	  guide->position = (guide->position * new_width) / old_width;
	  break;
	default:
	  g_error("Unknown guide orientation II.\n");
	}
    }
600

601 602 603 604 605 606 607 608
  /*  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]);
609

610
  gimp_remove_busy_cursors (NULL);
611 612 613
}

TileManager *
614
gimp_image_shadow (GimpImage *gimage, 
615 616 617
		   gint       width, 
		   gint       height, 
		   gint       bpp)
618 619
{
  if (gimage->shadow &&
620 621 622
      ((width != tile_manager_level_width (gimage->shadow)) ||
       (height != tile_manager_level_height (gimage->shadow)) ||
       (bpp != tile_manager_level_bpp (gimage->shadow))))
623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644
    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)
{
645
  GimpImage* gimage = GIMP_IMAGE (object);
Sven Neumann's avatar
Sven Neumann committed
646 647 648 649 650 651 652 653 654 655 656 657 658

  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);
659

BST 1999 Andy Thomas's avatar
BST 1999 Andy Thomas committed
660 661 662
  if (gimage->comp_preview)
    temp_buf_free (gimage->comp_preview);

Sven Neumann's avatar
Sven Neumann committed
663
  if (gimage->parasites)
664
    gtk_object_unref (GTK_OBJECT (gimage->parasites));
665 666 667
}

void
668 669 670 671 672 673
gimp_image_apply_image (GimpImage	 *gimage,
			GimpDrawable	 *drawable,
			PixelRegion	 *src2PR,
			gint              undo,
			gint              opacity,
			LayerModeEffects  mode,
674
			/*  alternative to using drawable tiles as src1: */
675 676 677
			TileManager	 *src1_tiles,
			gint              x,
			gint              y)
678
{
Sven Neumann's avatar
Sven Neumann committed
679
  Channel *mask;
680 681
  gint x1, y1, x2, y2;
  gint offset_x, offset_y;
682
  PixelRegion src1PR, destPR, maskPR;
683 684
  gint operation;
  gint active [MAX_CHANNELS];
685 686

  /*  get the selection mask if one exists  */
687
  mask = (gimage_mask_is_empty (gimage)) ? NULL : gimp_image_get_mask (gimage);
688 689 690 691 692 693 694 695 696 697

  /*  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
698
      g_message ("gimp_image_apply_image sent illegal parameters");
699 700 701 702 703 704 705
      return;
    }

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

  /*  make sure the image application coordinates are within gimage bounds  */
706
  x1 = CLAMP (x, 0, drawable_width  (drawable));
707
  y1 = CLAMP (y, 0, drawable_height (drawable));
708
  x2 = CLAMP (x + src2PR->w, 0, drawable_width  (drawable));
709 710 711 712 713 714 715 716
  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
       */
717 718 719 720
      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);
721 722 723 724
    }

  /*  If the calling procedure specified an undo step...  */
  if (undo)
725
    undo_push_image (gimp_drawable_gimage (drawable), drawable, x1, y1, x2, y2);
726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763

  /* 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
764 765 766
gimp_image_replace_image (GimpImage    *gimage, 
			  GimpDrawable *drawable, 
			  PixelRegion  *src2PR,
767 768
			  gint          undo, 
			  gint          opacity,
769
			  PixelRegion  *maskPR,
770 771
			  gint          x, 
			  gint          y)
772
{
Sven Neumann's avatar
Sven Neumann committed
773
  Channel *mask;
774 775
  gint x1, y1, x2, y2;
  gint offset_x, offset_y;
776 777
  PixelRegion src1PR, destPR;
  PixelRegion mask2PR, tempPR;
778 779 780
  guchar *temp_data;
  gint operation;
  gint active [MAX_CHANNELS];
781 782

  /*  get the selection mask if one exists  */
783
  mask = (gimage_mask_is_empty (gimage)) ? NULL : gimp_image_get_mask (gimage);
784 785 786 787 788 789 790 791 792 793

  /*  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
794
      g_message ("gimp_image_apply_image sent illegal parameters");
795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812
      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
       */
813 814 815 816
      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);
817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881
    }

  /*  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
882 883 884
gimp_image_get_foreground (GimpImage    *gimage, 
			   GimpDrawable *drawable, 
			   guchar       *fg)
885
{
886
  guchar pfg[3];
887 888

  /*  Get the palette color  */
889
  gimp_context_get_foreground (NULL, &pfg[0], &pfg[1], &pfg[2]);
890 891 892 893 894

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

void
895 896 897
gimp_image_get_background (GimpImage    *gimage, 
			   GimpDrawable *drawable, 
			   guchar       *bg)
898
{
899
  guchar pbg[3];
900 901

  /*  Get the palette color  */
902
  gimp_context_get_background (NULL, &pbg[0], &pbg[1], &pbg[2]);
903 904 905 906

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

907
guchar *
908
gimp_image_get_color_at (GimpImage *gimage, 
909 910
			 gint       x, 
			 gint       y)
911 912
{
  Tile *tile;
913 914
  guchar *src;
  guchar *dest;
915 916

  if (x < 0 || y < 0 || x >= gimage->width || y >= gimage->height)
917 918 919 920
    {
      return NULL;
    }
  dest = g_new (unsigned char, 5);
921 922 923 924
  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);
925 926

  if (TYPE_HAS_ALPHA (gimp_image_composite_type (gimage)))
927 928 929
    dest[3] = src[gimp_image_composite_bytes (gimage) - 1];
  else
    dest[3] = 255;
930

931 932
  dest[4] = 0;
  tile_release (tile, FALSE);
933

934 935 936
  return dest;
}

937
void
938
gimp_image_get_color (GimpImage     *gimage, 
939
		      GimpImageType  d_type,
940 941
		      guchar        *rgb, 
		      guchar        *src)
942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957
{
  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
958 959 960 961 962
gimp_image_transform_color (GimpImage         *gimage, 
			    GimpDrawable      *drawable,
			    guchar            *src, 
			    guchar            *dest, 
			    GimpImageBaseType  type)
963 964
{
#define INTENSITY(r,g,b) (r * 0.30 + g * 0.59 + b * 0.11 + 0.001)
965
  GimpImageType d_type;
966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990

  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,
991
				      gimage,
992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014
				      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,
1015
				      gimage,
1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032
				      src[GRAY_PIX],
				      src[GRAY_PIX],
				      src[GRAY_PIX]);
	  break;
	}
      break;
    default:
      break;
    }
}

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

  guide = g_new (Guide, 1);
1033 1034 1035
  guide->ref_count   = 0;
  guide->position    = -1;
  guide->guide_ID    = next_guide_id++;
1036
  guide->orientation = ORIENTATION_HORIZONTAL;
1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048

  gimage->guides = g_list_prepend (gimage->guides, guide);

  return guide;
}

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

  guide = g_new (Guide, 1);
1049 1050 1051
  guide->ref_count   = 0;
  guide->position    = -1;
  guide->guide_ID    = next_guide_id++;
1052
  guide->orientation = ORIENTATION_VERTICAL;
1053 1054 1055 1056 1057 1058 1059 1060

  gimage->guides = g_list_prepend (gimage->guides, guide);

  return guide;
}

void
gimp_image_add_guide (GimpImage *gimage,
1061
		      Guide     *guide)
1062 1063 1064 1065 1066 1067
{
  gimage->guides = g_list_prepend (gimage->guides, guide);
}

void
gimp_image_remove_guide (GimpImage *gimage,
1068
			 Guide     *guide)
1069 1070 1071 1072 1073 1074
{
  gimage->guides = g_list_remove (gimage->guides, guide);
}

void
gimp_image_delete_guide (GimpImage *gimage,
1075
			 Guide     *guide) 
1076
{
Sven Neumann's avatar
Sven Neumann committed
1077 1078 1079 1080 1081 1082 1083
  guide->position = -1;

  if (guide->ref_count <= 0)
    {
      gimage->guides = g_list_remove (gimage->guides, guide);
      g_free (guide);
    }
1084 1085
}

Sven Neumann's avatar
Sven Neumann committed
1086

1087
Parasite *
Marc Lehmann's avatar
Marc Lehmann committed
1088
gimp_image_parasite_find (const GimpImage *gimage, 
1089
			  const gchar     *name)
1090
{
1091
  return parasite_list_find (gimage->parasites, name);
1092 1093
}

1094 1095 1096 1097
static void
list_func (gchar      *key, 
	   Parasite   *p, 
	   gchar    ***cur)
Marc Lehmann's avatar
Marc Lehmann committed
1098
{
1099
  *(*cur)++ = (gchar *) g_strdup (key);