gimptransformtool.c 46.4 KB
Newer Older
Nate Summers's avatar
Nate Summers committed
1
/* The GIMP -- an image manipulation program
Nate Summers's avatar
Nate Summers committed
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
 * Copyright (C) 1995-2001 Spencer Kimball, Peter Mattis, and others
 *
 * 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.
 */

#include "config.h"

#include <stdlib.h>

#include <gtk/gtk.h>

#include "libgimpmath/gimpmath.h"
#include "libgimpwidgets/gimpwidgets.h"

Michael Natterer's avatar
Michael Natterer committed
28
#include "tools-types.h"
Nate Summers's avatar
Nate Summers committed
29

Michael Natterer's avatar
Michael Natterer committed
30
31
32
33
34
35
#include "base/base-config.h"
#include "base/pixel-region.h"
#include "base/pixel-surround.h"
#include "base/tile-manager.h"
#include "base/tile.h"

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

Michael Natterer's avatar
Michael Natterer committed
38
#include "core/gimp.h"
39
40
41
42
43
44
45
#include "core/gimpchannel.h"
#include "core/gimpcontext.h"
#include "core/gimpdrawable.h"
#include "core/gimpimage.h"
#include "core/gimpimage-mask.h"
#include "core/gimplayer.h"
#include "core/gimpmarshal.h"
Michael Natterer's avatar
Michael Natterer committed
46
#include "core/gimptoolinfo.h"
47

48
49
#include "gui/info-dialog.h"
#include "gdisplay.h"
Nate Summers's avatar
Nate Summers committed
50

51
52
53
54
#include "tool_manager.h"
#include "tool_options.h"
#include "transform_options.h"
#include "gimptransformtool.h"
Michael Natterer's avatar
Michael Natterer committed
55
56
57
58
59
#include "gimpperspectivetool.h"
#include "gimprotatetool.h"
#include "gimpscaletool.h"
#include "gimpsheartool.h"
#include "gimpfliptool.h"
60

Michael Natterer's avatar
Michael Natterer committed
61
62
63
64
#include "app_procs.h"
#include "floating_sel.h"
#include "undo.h"
#include "path_transform.h"
Nate Summers's avatar
Nate Summers committed
65
66
67

#include "libgimp/gimpintl.h"

68

Nate Summers's avatar
Nate Summers committed
69
70
71
72
enum
{
  TRANSFORM,
  LAST_SIGNAL
Nate Summers's avatar
Nate Summers committed
73
};
Nate Summers's avatar
Nate Summers committed
74
75
76
77
78
79
80

#define BILINEAR(jk,j1k,jk1,j1k1,dx,dy) \
                ((1-dy) * (jk + dx * (j1k - jk)) + \
		    dy  * (jk1 + dx * (j1k1 - jk1)))

/* access interleaved pixels */
#define CUBIC_ROW(dx, row, step) \
Nate Summers's avatar
Nate Summers committed
81
  gimp_transform_tool_cubic(dx, (row)[0], (row)[step], (row)[step+step], (row)[step+step+step])
Nate Summers's avatar
Nate Summers committed
82
#define CUBIC_SCALED_ROW(dx, row, step, i) \
Nate Summers's avatar
Nate Summers committed
83
  gimp_transform_tool_cubic(dx, (row)[0] * (row)[i], \
Nate Summers's avatar
Nate Summers committed
84
85
86
87
88
89
90
91
            (row)[step] * (row)[step + i], \
            (row)[step+step]* (row)[step+step + i], \
            (row)[step+step+step] * (row)[step+step+step + i])

#define REF_TILE(i,x,y) \
     tile[i] = tile_manager_get_tile (float_tiles, x, y, TRUE, FALSE); \
     src[i] = tile_data_pointer (tile[i], (x) % TILE_WIDTH, (y) % TILE_HEIGHT);

92

Nate Summers's avatar
Nate Summers committed
93
/*  forward function declarations  */
Nate Summers's avatar
Nate Summers committed
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
static void      gimp_transform_tool_bounds    (GimpTransformTool      *tool,
                                                GDisplay               *gdisp);
static void      gimp_transform_tool_recalc    (GimpTransformTool      *tool,
					        GDisplay               *gdisp);
static void      gimp_transform_tool_doit      (GimpTransformTool      *tool,
					        GDisplay               *gdisp);
static gdouble   gimp_transform_tool_cubic     (gdouble                 dx,
					        gint                    jm1,
					        gint                    j,
					        gint                    jp1,
					        gint                    jp2);
static void    gimp_transform_tool_setup_grid  (GimpTransformTool      *tool);
static void    gimp_transform_tool_grid_recalc (GimpTransformTool      *gimp_transform_tool);
static void    gimp_transform_tool_init        (GimpTransformTool      *tool);
static void    gimp_transform_tool_class_init  (GimpTransformToolClass *tool);
Nate Summers's avatar
Nate Summers committed
109

110
111
112
static void    gimp_transform_tool_destroy     (GtkObject              *object);

static void   gimp_transform_tool_button_press (GimpTool               *tool,
Nate Summers's avatar
Nate Summers committed
113
114
115
                                                GdkEventButton         *bevent,
			                        GDisplay               *gdisp);
			          
116
static void gimp_transform_tool_button_release (GimpTool               *tool,
Nate Summers's avatar
Nate Summers committed
117
118
119
			                        GdkEventButton         *bevent,
			                        GDisplay               *gdisp);
			                        
120
static void    gimp_transform_tool_motion      (GimpTool               *tool,
Nate Summers's avatar
Nate Summers committed
121
122
123
		                                GdkEventMotion         *mevent,
		                                GDisplay               *gdisp);
		                                
124
static void  gimp_transform_tool_cursor_update (GimpTool               *tool,
Nate Summers's avatar
Nate Summers committed
125
126
127
	                 		        GdkEventMotion         *mevent,
			                        GDisplay               *gdisp);
			                        
128
static void    gimp_transform_tool_control     (GimpTool               *tool,
Nate Summers's avatar
Nate Summers committed
129
130
			                        ToolAction              action,
			                        GDisplay               *gdisp);
131
132
133
134

static void    gimp_transform_tool_draw        (GimpDrawTool           *draw_tool);


Nate Summers's avatar
Nate Summers committed
135
/*  variables  */
Nate Summers's avatar
Nate Summers committed
136
137
138
static TranInfo           old_trans_info;
InfoDialog               *transform_info        = NULL;
static gboolean           transform_info_inited = FALSE;
Nate Summers's avatar
Nate Summers committed
139

140
static GimpDrawToolClass *parent_class = NULL;
141

142
143
144
145
static guint   gimp_transform_tool_signals[LAST_SIGNAL] = { 0 };


GType
Nate Summers's avatar
Nate Summers committed
146
147
gimp_transform_tool_get_type (void)
{
148
  static GType tool_type = 0;
Nate Summers's avatar
Nate Summers committed
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172

  if (! tool_type)
    {
      GtkTypeInfo tool_info =
      {
        "GimpTransformTool",
        sizeof (GimpTransformTool),
        sizeof (GimpTransformToolClass),
        (GtkClassInitFunc) gimp_transform_tool_class_init,
        (GtkObjectInitFunc) gimp_transform_tool_init,
        /* reserved_1 */ NULL,
        /* reserved_2 */ NULL,
        NULL /* (GtkClassInitFunc) gimp_tool_class_init, */
      };

      tool_type = gtk_type_unique (GIMP_TYPE_DRAW_TOOL, &tool_info);
    }

  return tool_type;
}

static void
gimp_transform_tool_class_init (GimpTransformToolClass *klass)
{
Nate Summers's avatar
Nate Summers committed
173
174
175
  GtkObjectClass    *object_class;
  GimpToolClass     *tool_class;
  GimpDrawToolClass *draw_class;
Nate Summers's avatar
Nate Summers committed
176
177
178

  object_class = (GtkObjectClass *) klass;
  tool_class   = (GimpToolClass *) klass;
Nate Summers's avatar
Nate Summers committed
179
  draw_class   = (GimpDrawToolClass *) klass;
Nate Summers's avatar
Nate Summers committed
180

181
  parent_class = g_type_class_peek_parent (klass);
Nate Summers's avatar
Nate Summers committed
182
183

  gimp_transform_tool_signals[TRANSFORM] =
184
185
186
187
188
189
190
191
192
    g_signal_new ("transform",
		  G_TYPE_FROM_CLASS (klass),
		  G_SIGNAL_RUN_LAST,
		  G_STRUCT_OFFSET (GimpTransformToolClass, transform),
		  NULL, NULL,
		  gimp_cclosure_marshal_POINTER__POINTER_INT,
		  G_TYPE_POINTER, 2,
		  G_TYPE_POINTER,
		  G_TYPE_INT);
Nate Summers's avatar
Nate Summers committed
193

Nate Summers's avatar
Nate Summers committed
194
  object_class->destroy      = gimp_transform_tool_destroy;
Nate Summers's avatar
Nate Summers committed
195
196
197
198
199
200

  tool_class->button_press   = gimp_transform_tool_button_press;
  tool_class->button_release = gimp_transform_tool_button_release;
  tool_class->motion         = gimp_transform_tool_motion;
  tool_class->cursor_update  = gimp_transform_tool_cursor_update;
  tool_class->control        = gimp_transform_tool_control;
Nate Summers's avatar
Nate Summers committed
201
202

  draw_class->draw           = gimp_transform_tool_draw;
Nate Summers's avatar
Nate Summers committed
203
204
205
}

static void
Nate Summers's avatar
Nate Summers committed
206
gimp_transform_tool_init (GimpTransformTool *tr_tool)
Nate Summers's avatar
Nate Summers committed
207
{
208
209
  GimpTool *tool = GIMP_TOOL (tr_tool);
  gint      i;
Nate Summers's avatar
Nate Summers committed
210
211
212
213
214
215
216
217
218
219
220

  tr_tool->function = TRANSFORM_CREATING;
  tr_tool->original = NULL;

  tr_tool->bpressed = FALSE;

  for (i = 0; i < TRAN_INFO_SIZE; i++)
    tr_tool->trans_info[i] = 0;

  tr_tool->grid_coords = tr_tool->tgrid_coords = NULL;

221
222
223
  /* FIXME */
  tr_tool->interactive = TRUE;

Nate Summers's avatar
Nate Summers committed
224
225
  tool->scroll_lock = TRUE;   /*  Disallow scrolling  */
  tool->preserve    = FALSE;  /*  Don't preserve on drawable change  */
226

Nate Summers's avatar
Nate Summers committed
227
228
}

Nate Summers's avatar
Nate Summers committed
229
230
231
232
233
234
235
236
237
238
TileManager *
gimp_transform_tool_transform (GimpTransformTool   *tool,
                               GDisplay            *gdisp,
			       TransformState       state)
{
  TileManager *retval;

  g_return_val_if_fail (tool, NULL);
  g_return_val_if_fail (GIMP_IS_TRANSFORM_TOOL (tool), NULL);

239
240
  g_signal_emit (G_OBJECT (tool), gimp_transform_tool_signals[TRANSFORM], 0,
                 gdisp, state, &retval);
Nate Summers's avatar
Nate Summers committed
241
242
243
244

  return retval;
}

Nate Summers's avatar
Nate Summers committed
245
246
247
248
static void
transform_ok_callback (GtkWidget *widget,
		       gpointer   data)
{
Nate Summers's avatar
Nate Summers committed
249
  GimpTool *tool;
Nate Summers's avatar
Nate Summers committed
250

Nate Summers's avatar
Nate Summers committed
251
252
  tool = GIMP_TOOL(data);
  gimp_transform_tool_doit (GIMP_TRANSFORM_TOOL(tool), tool->gdisp);
Nate Summers's avatar
Nate Summers committed
253
254
255
256
257
258
259
260
261
262
}

static void
transform_reset_callback (GtkWidget *widget,
			  gpointer   data)
{
  GimpTransformTool   *tool;
  GimpDrawTool        *dr_tool;
  gint                 i;

263
264
  tool    = GIMP_TRANSFORM_TOOL (data);
  dr_tool = GIMP_DRAW_TOOL (data);
Nate Summers's avatar
Nate Summers committed
265
266

  /*  stop the current tool drawing process  */
Nate Summers's avatar
Nate Summers committed
267
  gimp_draw_tool_pause (dr_tool);
Nate Summers's avatar
Nate Summers committed
268
269
270
271
272
273

  /*  Restore the previous transformation info  */
  for (i = 0; i < TRAN_INFO_SIZE; i++)
    tool->trans_info [i] = old_trans_info [i];

  /*  recalculate the tool's transformation matrix  */
Nate Summers's avatar
Nate Summers committed
274
  gimp_transform_tool_recalc (tool, GIMP_TOOL(tool)->gdisp);
Nate Summers's avatar
Nate Summers committed
275
276

  /*  resume drawing the current tool  */
Nate Summers's avatar
Nate Summers committed
277
  gimp_draw_tool_resume (dr_tool);
Nate Summers's avatar
Nate Summers committed
278
279
}

280
281
static void
gimp_transform_tool_destroy (GtkObject *object)
Nate Summers's avatar
Nate Summers committed
282
{
283
284
  GimpTransformTool *tr_tool;
  GimpTool          *tool;
Nate Summers's avatar
Nate Summers committed
285

286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
  tr_tool = GIMP_TRANSFORM_TOOL (object);
  tool    = GIMP_TOOL           (tr_tool);

  /*  Free up the original selection if it exists  */
  if (tr_tool->original)
    tile_manager_destroy (tr_tool->original);

  /*  If there is an information dialog, free it up  */
  if (transform_info)
    info_dialog_free (transform_info);

  transform_info        = NULL;
  transform_info_inited = FALSE;

  /*  Free the grid line endpoint arrays if they exist */
  if (tr_tool->grid_coords != NULL)
    g_free (tr_tool->grid_coords);

  if (tr_tool->tgrid_coords != NULL)
    g_free (tr_tool->tgrid_coords);

  if (GTK_OBJECT_CLASS (parent_class)->destroy)
    GTK_OBJECT_CLASS (parent_class)->destroy (object);
}

static void
Nate Summers's avatar
Nate Summers committed
312
gimp_transform_tool_button_press (GimpTool           *tool,
Nate Summers's avatar
Nate Summers committed
313
314
315
                                  GdkEventButton     *bevent,
			          GDisplay           *gdisp)
{
Nate Summers's avatar
Nate Summers committed
316
317
318
319
320
321
322
  GimpTransformTool  *gt_tool;
  GimpDrawable       *drawable;
  gint                dist;
  gint                closest_dist;
  gint                x, y;
  gint                i;
  gint                off_x, off_y;
Nate Summers's avatar
Nate Summers committed
323

324
  gt_tool = GIMP_TRANSFORM_TOOL (tool);
Nate Summers's avatar
Nate Summers committed
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343

  gt_tool->bpressed = TRUE; /* ALT */

  drawable = gimp_image_active_drawable (gdisp->gimage);

  if (gt_tool->function == TRANSFORM_CREATING && tool->state == ACTIVE)
    {
      /*  Save the current transformation info  */
      for (i = 0; i < TRAN_INFO_SIZE; i++)
	old_trans_info [i] = gt_tool->trans_info [i];
    }

  /*  if we have already displayed the bounding box and handles,
   *  check to make sure that the display which currently owns the
   *  tool is the one which just received the button pressed event
   */
  if ((gdisp == tool->gdisp) && gt_tool->interactive)
    {
      /*  start drawing the bounding box and handles...  */
344
345
      gimp_draw_tool_start (GIMP_DRAW_TOOL (gt_tool), gdisp->canvas->window);

Nate Summers's avatar
Nate Summers committed
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
      x = bevent->x;
      y = bevent->y;

      closest_dist = SQR (x - gt_tool->sx1) + SQR (y - gt_tool->sy1);
      gt_tool->function = TRANSFORM_HANDLE_1;

      dist = SQR (x - gt_tool->sx2) + SQR (y - gt_tool->sy2);
      if (dist < closest_dist)
	{
	  closest_dist = dist;
	  gt_tool->function = TRANSFORM_HANDLE_2;
	}

      dist = SQR (x - gt_tool->sx3) + SQR (y - gt_tool->sy3);
      if (dist < closest_dist)
	{
	  closest_dist = dist;
	  gt_tool->function = TRANSFORM_HANDLE_3;
	}

      dist = SQR (x - gt_tool->sx4) + SQR (y - gt_tool->sy4);
      if (dist < closest_dist)
	{
	  closest_dist = dist;
	  gt_tool->function = TRANSFORM_HANDLE_4;
	}

373
374
      if ((SQR (x - gt_tool->scx) +
	   SQR (y - gt_tool->scy)) <= 100)
Nate Summers's avatar
Nate Summers committed
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
	{
	  gt_tool->function = TRANSFORM_HANDLE_CENTER;
	}

      /*  Save the current pointer position  */
      gdisplay_untransform_coords (gdisp, bevent->x, bevent->y,
				   &gt_tool->startx,
				   &gt_tool->starty, TRUE, 0);
      gt_tool->lastx = gt_tool->startx;
      gt_tool->lasty = gt_tool->starty;

      gdk_pointer_grab (gdisp->canvas->window, FALSE,
			GDK_POINTER_MOTION_HINT_MASK |
			GDK_BUTTON1_MOTION_MASK |
			GDK_BUTTON_RELEASE_MASK,
			NULL, NULL, bevent->time);

      tool->state = ACTIVE;
      return;
    }


  /*  Initialisation stuff: if the cursor is clicked inside the current
   *  selection, show the bounding box and handles...
   */
  gdisplay_untransform_coords (gdisp, bevent->x, bevent->y, &x, &y,
			       FALSE, FALSE);

  gimp_drawable_offsets (drawable, &off_x, &off_y);
  if (x >= off_x && y >= off_y &&
      x < (off_x + gimp_drawable_width (drawable)) &&
      y < (off_y + gimp_drawable_height (drawable)))
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
    {
      if (gimage_mask_is_empty (gdisp->gimage) ||
	  gimage_mask_value (gdisp->gimage, x, y))
	{
	  if (GIMP_IS_LAYER (drawable) &&
	      gimp_layer_get_mask (GIMP_LAYER (drawable)))
	    {
	      g_message (_("Transformations do not work on\n"
			   "layers that contain layer masks."));
	      tool->state = INACTIVE;
	      return;
	    }

	  /*  If the tool is already active, clear the current state
	   *  and reset
	   */
	  if (tool->state == ACTIVE)
	    gimp_transform_tool_reset (gt_tool, gdisp);

	  /*  Set the pointer to the active display  */
	  tool->gdisp    = gdisp;
	  tool->drawable = drawable;
	  tool->state    = ACTIVE;

	  /*  Grab the pointer if we're in non-interactive mode  */
	  if (!gt_tool->interactive)
	    gdk_pointer_grab (gdisp->canvas->window, FALSE,
			      (GDK_POINTER_MOTION_HINT_MASK |
			       GDK_BUTTON1_MOTION_MASK |
			       GDK_BUTTON_RELEASE_MASK),
			      NULL, NULL, bevent->time);

	  /*  Find the transform bounds for some tools (like scale,
	   *  perspective) that actually need the bounds for
	   *  initializing
	   */
	  gimp_transform_tool_bounds (gt_tool, gdisp);

	  /*  Calculate the grid line endpoints  */
	  if (gimp_transform_tool_show_grid ())
	    gimp_transform_tool_setup_grid (gt_tool);

	  /*  Initialize the transform tool */
	  gimp_transform_tool_transform (gt_tool, gdisp, TRANSFORM_INIT);

	  if (transform_info && !transform_info_inited)
	    {
454
	      GType tool_type;
455
456

	      tool_type =
Michael Natterer's avatar
Michael Natterer committed
457
		gimp_context_get_tool (gimp_get_user_context (gdisp->gimage->gimp))->tool_type;
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486

	      gimp_dialog_create_action_area
		(GTK_DIALOG (transform_info->shell),

		 /* FIXME: this does not belong here */
		 (tool_type == GIMP_TYPE_ROTATE_TOOL)      ? _("Rotate")    :
		 (tool_type == GIMP_TYPE_SCALE_TOOL)       ? _("Scale")     :
		 (tool_type == GIMP_TYPE_SHEAR_TOOL)       ? _("Shear")     :
		 (tool_type == GIMP_TYPE_PERSPECTIVE_TOOL) ? _("Transform") :
		 "EEK",
		 transform_ok_callback,
		 tool, NULL, NULL, TRUE, FALSE,

		 _("Reset"), transform_reset_callback,
		 tool, NULL, NULL, FALSE, FALSE,

		 NULL);

	      transform_info_inited = TRUE;
	    }

	  /*  Recalculate the transform tool  */
	  gimp_transform_tool_recalc (gt_tool, gdisp);

	  /*  recall this function to find which handle we're dragging  */
	  if (gt_tool->interactive)
	    gimp_transform_tool_button_press (tool, bevent, gdisp);
	}
    }
Nate Summers's avatar
Nate Summers committed
487
488
}

489
static void
Nate Summers's avatar
Nate Summers committed
490
491
492
gimp_transform_tool_button_release (GimpTool         *tool,
			            GdkEventButton   *bevent,
			            GDisplay         *gdisp)
Nate Summers's avatar
Nate Summers committed
493
{
Nate Summers's avatar
Nate Summers committed
494
495
  GimpTransformTool *gt_tool;
  gint               i;
Nate Summers's avatar
Nate Summers committed
496

497
  gt_tool = GIMP_TRANSFORM_TOOL (tool);
Nate Summers's avatar
Nate Summers committed
498
499
500
501

  gt_tool->bpressed = FALSE; /* ALT */

  /*  if we are creating, there is nothing to be done...exit  */
502
  if (gt_tool->function == TRANSFORM_CREATING && gt_tool->interactive)
Nate Summers's avatar
Nate Summers committed
503
504
505
506
507
508
509
510
511
512
    return;

  /*  release of the pointer grab  */
  gdk_pointer_ungrab (bevent->time);
  gdk_flush ();

  /*  if the 3rd button isn't pressed, transform the selected mask  */
  if (! (bevent->state & GDK_BUTTON3_MASK))
    {
      /* Shift-clicking is another way to approve the transform  */
513
      if ((bevent->state & GDK_SHIFT_MASK) || GIMP_IS_FLIP_TOOL (tool))
Nate Summers's avatar
Nate Summers committed
514
	{
Nate Summers's avatar
Nate Summers committed
515
	  gimp_transform_tool_doit (gt_tool, gdisp);
Nate Summers's avatar
Nate Summers committed
516
517
518
519
520
521
522
523
524
525
526
	}
      else
	{
	  /*  Only update the paths preview */
	  path_transform_current_path (gdisp->gimage,
				       gt_tool->transform, TRUE);
	}
    }
  else
    {
      /*  stop the current tool drawing process  */
527
      gimp_draw_tool_pause (GIMP_DRAW_TOOL (tool));
Nate Summers's avatar
Nate Summers committed
528
529
530
531
532
533
534
535
536

      /*  Restore the previous transformation info  */
      for (i = 0; i < TRAN_INFO_SIZE; i++)
	gt_tool->trans_info [i] = old_trans_info [i];

      /*  recalculate the tool's transformation matrix  */
      gimp_transform_tool_recalc (gt_tool, gdisp);

      /*  resume drawing the current tool  */
537
      gimp_draw_tool_resume (GIMP_DRAW_TOOL (tool));
Nate Summers's avatar
Nate Summers committed
538
539
540
541
542
543
544
545
546
547
548

      /* Update the paths preview */
      path_transform_current_path (gdisp->gimage,
				   gt_tool->transform, TRUE);
    }

  /*  if this tool is non-interactive, make it inactive after use  */
  if (!gt_tool->interactive)
    tool->state = INACTIVE;
}

549
static void
Nate Summers's avatar
Nate Summers committed
550
551
552
553
554
555
556
557
558
559
gimp_transform_tool_doit (GimpTransformTool  *gt_tool,
		          GDisplay           *gdisp)
{
  GimpTool      *tool;
  TileManager   *new_tiles;
  TransformUndo *tu;
  PathUndo      *pundo;
  gboolean       new_layer;
  gint           i, x, y;

560
  gimp_set_busy (gdisp->gimage->gimp);
Nate Summers's avatar
Nate Summers committed
561

562
  tool = GIMP_TOOL (gt_tool);
Nate Summers's avatar
Nate Summers committed
563
564

  /* undraw the tool before we muck around with the transform matrix */
565
  gimp_draw_tool_pause (GIMP_DRAW_TOOL (gt_tool));
Nate Summers's avatar
Nate Summers committed
566
567
568
569
570
571
572
573
574

  /*  We're going to dirty this image, but we want to keep the tool
   *  around
   */
  tool->preserve = TRUE;

  /*  Start a transform undo group  */
  undo_push_group_start (gdisp->gimage, TRANSFORM_CORE_UNDO);

575
576
577
  /* With the old UI, if original is NULL, then this is the
   * first transformation. In the new UI, it is always so, right?
   */
Nate Summers's avatar
Nate Summers committed
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
  g_assert (gt_tool->original == NULL);

  /* If we're in interactive mode, we need to copy the current
   *  selection to the transform tool's private selection pointer, so
   *  that the original source can be repeatedly modified.
   */
  tool->drawable = gimp_image_active_drawable (gdisp->gimage);

  gt_tool->original = gimp_transform_tool_cut (gdisp->gimage,
					       tool->drawable,
					       &new_layer);

  pundo = path_transform_start_undo (gdisp->gimage);

  /*  Send the request for the transformation to the tool...
   */
Nate Summers's avatar
Nate Summers committed
594
  new_tiles = gimp_transform_tool_transform (gt_tool, gdisp,
595
					     TRANSFORM_FINISH);
Nate Summers's avatar
Nate Summers committed
596

Nate Summers's avatar
Nate Summers committed
597
  gimp_transform_tool_transform (gt_tool, gdisp, TRANSFORM_INIT);
Nate Summers's avatar
Nate Summers committed
598
599
600
601
602
603
604
605
606
607

  gimp_transform_tool_recalc (gt_tool, gdisp);

  if (new_tiles)
    {
      /*  paste the new transformed image to the gimage...also implement
       *  undo...
       */
      /*  FIXME: we should check if the drawable is still valid  */
      gimp_transform_tool_paste (gdisp->gimage, tool->drawable,
608
				 new_tiles, new_layer);
Nate Summers's avatar
Nate Summers committed
609
610

      /*  create and initialize the transform_undo structure  */
611
612
      tu = g_new0 (TransformUndo, 1);
      tu->tool_ID   = tool->ID;
613
      tu->tool_type = G_TYPE_FROM_INSTANCE (tool);
Nate Summers's avatar
Nate Summers committed
614

Nate Summers's avatar
Nate Summers committed
615
616
      for (i = 0; i < TRAN_INFO_SIZE; i++)
	tu->trans_info[i] = old_trans_info[i];
617
618

      tu->original  = NULL;
Nate Summers's avatar
Nate Summers committed
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
      tu->path_undo = pundo;

      /*  Make a note of the new current drawable (since we may have
       *  a floating selection, etc now.
       */
      tool->drawable = gimp_image_active_drawable (gdisp->gimage);

      undo_push_transform (gdisp->gimage, (void *) tu);
    }

  /*  push the undo group end  */
  undo_push_group_end (gdisp->gimage);

  /*  We're done dirtying the image, and would like to be restarted
   *  if the image gets dirty while the tool exists
   */
  tool->preserve = FALSE;

  /*  Flush the gdisplays  */
  if (gdisp->disp_xoffset || gdisp->disp_yoffset)
    {
      gdk_window_get_size (gdisp->canvas->window, &x, &y);
      if (gdisp->disp_yoffset)
	{
	  gdisplay_expose_area (gdisp, 0, 0, gdisp->disp_width,
				gdisp->disp_yoffset);
	  gdisplay_expose_area (gdisp, 0, gdisp->disp_yoffset + y,
				gdisp->disp_width, gdisp->disp_height);
	}
      if (gdisp->disp_xoffset)
	{
	  gdisplay_expose_area (gdisp, 0, 0, gdisp->disp_xoffset,
				gdisp->disp_height);
	  gdisplay_expose_area (gdisp, gdisp->disp_xoffset + x, 0,
				gdisp->disp_width, gdisp->disp_height);
	}
    }

657
  gimp_unset_busy (gdisp->gimage->gimp);
Nate Summers's avatar
Nate Summers committed
658
659
660

  gdisplays_flush ();

661
  gimp_transform_tool_reset (gt_tool, gdisp);
Nate Summers's avatar
Nate Summers committed
662
663

  /*  if this tool is non-interactive, make it inactive after use  */
Nate Summers's avatar
Nate Summers committed
664
  if (!gt_tool->interactive)
Nate Summers's avatar
Nate Summers committed
665
666
667
    tool->state = INACTIVE;
}

668
static void
Nate Summers's avatar
Nate Summers committed
669
670
671
gimp_transform_tool_motion (GimpTool          *tool,
		            GdkEventMotion    *mevent,
		            GDisplay          *gdisp)
Nate Summers's avatar
Nate Summers committed
672
{
Nate Summers's avatar
Nate Summers committed
673
  GimpTransformTool *tr_tool;
Nate Summers's avatar
Nate Summers committed
674

675
  tr_tool = GIMP_TRANSFORM_TOOL (tool);
Nate Summers's avatar
Nate Summers committed
676

677
  if (! tr_tool->bpressed)
Nate Summers's avatar
Nate Summers committed
678
679
680
681
682
    return;

  /*  if we are creating or this tool is non-interactive, there is
   *  nothing to be done so exit.
   */
Nate Summers's avatar
Nate Summers committed
683
684
  if (tr_tool->function == TRANSFORM_CREATING ||
      !tr_tool->interactive)
Nate Summers's avatar
Nate Summers committed
685
686
687
    return;

  /*  stop the current tool drawing process  */
688
  gimp_draw_tool_pause (GIMP_DRAW_TOOL (tool));
Nate Summers's avatar
Nate Summers committed
689
690

  gdisplay_untransform_coords (gdisp, mevent->x, mevent->y,
Nate Summers's avatar
Nate Summers committed
691
692
693
			       &tr_tool->curx,
			       &tr_tool->cury, TRUE, 0);
  tr_tool->state = mevent->state;
Nate Summers's avatar
Nate Summers committed
694
695

  /*  recalculate the tool's transformation matrix  */
Nate Summers's avatar
Nate Summers committed
696
  gimp_transform_tool_transform (tr_tool, gdisp, TRANSFORM_MOTION);
Nate Summers's avatar
Nate Summers committed
697

Nate Summers's avatar
Nate Summers committed
698
699
  tr_tool->lastx = tr_tool->curx;
  tr_tool->lasty = tr_tool->cury;
Nate Summers's avatar
Nate Summers committed
700
701

  /*  resume drawing the current tool  */
702
  gimp_draw_tool_resume (GIMP_DRAW_TOOL (tool));
Nate Summers's avatar
Nate Summers committed
703
704
}

705
static void
Nate Summers's avatar
Nate Summers committed
706
gimp_transform_tool_cursor_update (GimpTool           *tool,
Nate Summers's avatar
Nate Summers committed
707
708
			           GdkEventMotion     *mevent,
			           GDisplay           *gdisp)
Nate Summers's avatar
Nate Summers committed
709
{
Nate Summers's avatar
Nate Summers committed
710
711
712
713
  GimpTransformTool  *tr_tool;
  GimpDrawable       *drawable;
  GdkCursorType       ctype = GDK_TOP_LEFT_ARROW;
  gint                x, y;
Nate Summers's avatar
Nate Summers committed
714

715
  tr_tool = GIMP_TRANSFORM_TOOL (tool);
Nate Summers's avatar
Nate Summers committed
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745

  gdisplay_untransform_coords (gdisp, mevent->x, mevent->y, &x, &y,
			       FALSE, FALSE);

  if ((drawable = gimp_image_active_drawable (gdisp->gimage)))
    {
      if (GIMP_IS_LAYER (drawable) &&
	  gimp_layer_get_mask (GIMP_LAYER (drawable)))
	{
	  ctype = GIMP_BAD_CURSOR;
	}
      else if (x >= drawable->offset_x &&
	       y >= drawable->offset_y &&
	       x < (drawable->offset_x + drawable->width) &&
	       y < (drawable->offset_y + drawable->height))
	{
	  if (gimage_mask_is_empty (gdisp->gimage) ||
	      gimage_mask_value (gdisp->gimage, x, y))
	    {
	      ctype = GIMP_MOUSE_CURSOR;
	    }
	}
    }

  gdisplay_install_tool_cursor (gdisp,
				ctype,
				tool->tool_cursor,
				GIMP_CURSOR_MODIFIER_NONE);
}

746
747
748
749
static void
gimp_transform_tool_control (GimpTool   *tool,
			     ToolAction  action,
			     GDisplay   *gdisp)
Nate Summers's avatar
Nate Summers committed
750
{
751
752
  GimpDrawTool      *dr_tool;
  GimpTransformTool *tr_tool;
Nate Summers's avatar
Nate Summers committed
753

754
755
  dr_tool = GIMP_DRAW_TOOL (tool);
  tr_tool = GIMP_TRANSFORM_TOOL (tool);
Nate Summers's avatar
Nate Summers committed
756
757
758
759
760
761
762

  switch (action)
    {
    case PAUSE:
      break;

    case RESUME:
Nate Summers's avatar
Nate Summers committed
763
      gimp_transform_tool_recalc (tr_tool, gdisp);
Nate Summers's avatar
Nate Summers committed
764
765
766
      break;

    case HALT:
Nate Summers's avatar
Nate Summers committed
767
      gimp_transform_tool_reset (tr_tool, gdisp);
Nate Summers's avatar
Nate Summers committed
768
769
770
771
772
773
      break;

    default:
      break;
    }

774
775
  if (GIMP_TOOL_CLASS (parent_class)->control)
    GIMP_TOOL_CLASS (parent_class)->control (tool, action, gdisp);
Nate Summers's avatar
Nate Summers committed
776
777
}

778
static void
Nate Summers's avatar
Nate Summers committed
779
gimp_transform_tool_draw (GimpDrawTool *dr_tool)
Nate Summers's avatar
Nate Summers committed
780
{
Nate Summers's avatar
Nate Summers committed
781
782
783
784
785
786
787
788
  GDisplay           *gdisp;
  GimpTransformTool  *tr_tool;
  GimpTool           *tool;
  gint                x1, y1, x2, y2, x3, y3, x4, y4;
  gint                srw, srh;
  gint                i, k, gci;
  gint                xa, ya, xb, yb;

789
790
  tr_tool = GIMP_TRANSFORM_TOOL (dr_tool);
  tool    = GIMP_TOOL (dr_tool);
Nate Summers's avatar
Nate Summers committed
791

792
  gdisp   = tool->gdisp;
Nate Summers's avatar
Nate Summers committed
793
794
795
796
797
798
799
800
801
802
803
804
805
806

  gdisplay_transform_coords (gdisp, tr_tool->tx1, tr_tool->ty1,
			     &tr_tool->sx1, &tr_tool->sy1, FALSE);
  gdisplay_transform_coords (gdisp, tr_tool->tx2, tr_tool->ty2,
			     &tr_tool->sx2, &tr_tool->sy2, FALSE);
  gdisplay_transform_coords (gdisp, tr_tool->tx3, tr_tool->ty3,
			     &tr_tool->sx3, &tr_tool->sy3, FALSE);
  gdisplay_transform_coords (gdisp, tr_tool->tx4, tr_tool->ty4,
			     &tr_tool->sx4, &tr_tool->sy4, FALSE);

  x1 = tr_tool->sx1;  y1 = tr_tool->sy1;
  x2 = tr_tool->sx2;  y2 = tr_tool->sy2;
  x3 = tr_tool->sx3;  y3 = tr_tool->sy3;
  x4 = tr_tool->sx4;  y4 = tr_tool->sy4;
Nate Summers's avatar
Nate Summers committed
807
808
809
810
811
812

  /*  find the handles' width and height  */
  srw = 10;
  srh = 10;

  /*  draw the bounding box  */
Nate Summers's avatar
Nate Summers committed
813
  gdk_draw_line (dr_tool->win, dr_tool->gc,
Nate Summers's avatar
Nate Summers committed
814
		 x1, y1, x2, y2);
Nate Summers's avatar
Nate Summers committed
815
  gdk_draw_line (dr_tool->win, dr_tool->gc,
Nate Summers's avatar
Nate Summers committed
816
		 x2, y2, x4, y4);
Nate Summers's avatar
Nate Summers committed
817
  gdk_draw_line (dr_tool->win, dr_tool->gc,
Nate Summers's avatar
Nate Summers committed
818
		 x3, y3, x4, y4);
Nate Summers's avatar
Nate Summers committed
819
  gdk_draw_line (dr_tool->win, dr_tool->gc,
Nate Summers's avatar
Nate Summers committed
820
821
822
823
		 x3, y3, x1, y1);

  /*  Draw the grid */

Nate Summers's avatar
Nate Summers committed
824
  if ((tr_tool->grid_coords != NULL) &&
Nate Summers's avatar
Nate Summers committed
825
826
      (tr_tool->tgrid_coords != NULL) /* FIXME!!! this doesn't belong here &&
      ((tool->type != PERSPECTIVE)  ||
Nate Summers's avatar
Nate Summers committed
827
       ((tr_tool->transform[0][0] >=0.0) &&
Nate Summers's avatar
Nate Summers committed
828
	(tr_tool->transform[1][1] >=0.0)) */ ) 
Nate Summers's avatar
Nate Summers committed
829
830
    {
      gci = 0;
Nate Summers's avatar
Nate Summers committed
831
      k = tr_tool->ngx + tr_tool->ngy;
832

Nate Summers's avatar
Nate Summers committed
833
834
      for (i = 0; i < k; i++)
	{
Nate Summers's avatar
Nate Summers committed
835
836
	  gdisplay_transform_coords (gdisp, tr_tool->tgrid_coords[gci],
				     tr_tool->tgrid_coords[gci+1],
Nate Summers's avatar
Nate Summers committed
837
				     &xa, &ya, FALSE);
Nate Summers's avatar
Nate Summers committed
838
839
	  gdisplay_transform_coords (gdisp, tr_tool->tgrid_coords[gci+2],
				     tr_tool->tgrid_coords[gci+3],
Nate Summers's avatar
Nate Summers committed
840
841
				     &xb, &yb, FALSE);

Nate Summers's avatar
Nate Summers committed
842
	  gdk_draw_line (dr_tool->win, dr_tool->gc,
Nate Summers's avatar
Nate Summers committed
843
844
845
846
847
848
			 xa, ya, xb, yb);
	  gci += 4;
	}
    }

  /*  draw the tool handles  */
Nate Summers's avatar
Nate Summers committed
849
  gdk_draw_rectangle (dr_tool->win, dr_tool->gc, 0,
Nate Summers's avatar
Nate Summers committed
850
		      x1 - (srw >> 1), y1 - (srh >> 1), srw, srh);
Nate Summers's avatar
Nate Summers committed
851
  gdk_draw_rectangle (dr_tool->win, dr_tool->gc, 0,
Nate Summers's avatar
Nate Summers committed
852
		      x2 - (srw >> 1), y2 - (srh >> 1), srw, srh);
Nate Summers's avatar
Nate Summers committed
853
  gdk_draw_rectangle (dr_tool->win, dr_tool->gc, 0,
Nate Summers's avatar
Nate Summers committed
854
		      x3 - (srw >> 1), y3 - (srh >> 1), srw, srh);
Nate Summers's avatar
Nate Summers committed
855
  gdk_draw_rectangle (dr_tool->win, dr_tool->gc, 0,
Nate Summers's avatar
Nate Summers committed
856
857
858
		      x4 - (srw >> 1), y4 - (srh >> 1), srw, srh);

  /*  draw the center  */
859
860
861
  gdisplay_transform_coords (gdisp,
			     tr_tool->tcx, tr_tool->tcy,
			     &tr_tool->scx, &tr_tool->scy, FALSE);
Nate Summers's avatar
Nate Summers committed
862

863
864
865
866
867
868
  gdk_draw_arc (dr_tool->win,
		dr_tool->gc,
		1,
		tr_tool->scx - (srw >> 1),
		tr_tool->scy - (srh >> 1),
		srw, srh, 0, 23040);
Nate Summers's avatar
Nate Summers committed
869

870
  if (gimp_transform_tool_showpath ())
Nate Summers's avatar
Nate Summers committed
871
872
873
    {
      GimpMatrix3 tmp_matrix;

874
      if (gimp_transform_tool_direction () == TRANSFORM_CORRECTIVE)
Nate Summers's avatar
Nate Summers committed
875
	{
Nate Summers's avatar
Nate Summers committed
876
	  gimp_matrix3_invert (tr_tool->transform, tmp_matrix);
Nate Summers's avatar
Nate Summers committed
877
878
879
	}
      else
	{
Nate Summers's avatar
Nate Summers committed
880
	  gimp_matrix3_duplicate (tr_tool->transform, tmp_matrix);
Nate Summers's avatar
Nate Summers committed
881
882
	}

Nate Summers's avatar
Nate Summers committed
883
      path_transform_draw_current (gdisp, dr_tool, tmp_matrix);
Nate Summers's avatar
Nate Summers committed
884
885
886
887
    }
}

void
Nate Summers's avatar
Nate Summers committed
888
gimp_transform_tool_transform_bounding_box (GimpTransformTool *tr_tool)
Nate Summers's avatar
Nate Summers committed
889
{
Nate Summers's avatar
Nate Summers committed
890
891
892
893
  GimpTool  *tool;
  gint       i, k;
  gint       gci;

894
  tool = GIMP_TOOL (tr_tool);
Nate Summers's avatar
Nate Summers committed
895
896
897
898
899
900
901
902
903
904
905
906
907

  gimp_matrix3_transform_point (tr_tool->transform,
				tr_tool->x1, tr_tool->y1,
				&tr_tool->tx1, &tr_tool->ty1);
  gimp_matrix3_transform_point (tr_tool->transform,
				tr_tool->x2, tr_tool->y1,
				&tr_tool->tx2, &tr_tool->ty2);
  gimp_matrix3_transform_point (tr_tool->transform,
				tr_tool->x1, tr_tool->y2,
				&tr_tool->tx3, &tr_tool->ty3);
  gimp_matrix3_transform_point (tr_tool->transform,
				tr_tool->x2, tr_tool->y2,
				&tr_tool->tx4, &tr_tool->ty4);
Nate Summers's avatar
Nate Summers committed
908

909
910
911
  gimp_matrix3_transform_point (tr_tool->transform,
				tr_tool->cx, tr_tool->cy,
				&tr_tool->tcx, &tr_tool->tcy);
Nate Summers's avatar
Nate Summers committed
912

Nate Summers's avatar
Nate Summers committed
913
914
  if (tr_tool->grid_coords != NULL &&
      tr_tool->tgrid_coords != NULL)
Nate Summers's avatar
Nate Summers committed
915
916
    {
      gci = 0;
Nate Summers's avatar
Nate Summers committed
917
      k  = (tr_tool->ngx + tr_tool->ngy) * 2;
918

Nate Summers's avatar
Nate Summers committed
919
920
      for (i = 0; i < k; i++)
	{
Nate Summers's avatar
Nate Summers committed
921
922
923
924
925
	  gimp_matrix3_transform_point (tr_tool->transform,
					tr_tool->grid_coords[gci],
					tr_tool->grid_coords[gci+1],
					&(tr_tool->tgrid_coords[gci]),
					&(tr_tool->tgrid_coords[gci+1]));
Nate Summers's avatar
Nate Summers committed
926
927
928
929
930
931
	  gci += 2;
	}
    }
}

void
932
933
gimp_transform_tool_reset (GimpTransformTool *tr_tool,
		           GDisplay          *gdisp)
Nate Summers's avatar
Nate Summers committed
934
{
Nate Summers's avatar
Nate Summers committed
935
  GimpTool *tool;
Nate Summers's avatar
Nate Summers committed
936

937
  tool = GIMP_TOOL (tr_tool);
Nate Summers's avatar
Nate Summers committed
938

Nate Summers's avatar
Nate Summers committed
939
  if (tr_tool->original)
940
941
942
943
    {
      tile_manager_destroy (tr_tool->original);
      tr_tool->original = NULL;
    }
Nate Summers's avatar
Nate Summers committed
944
945

  /*  inactivate the tool  */
Nate Summers's avatar
Nate Summers committed
946
  tr_tool->function = TRANSFORM_CREATING;
947
  gimp_draw_tool_stop (GIMP_DRAW_TOOL (tr_tool));
Nate Summers's avatar
Nate Summers committed
948
949
950
951
952
953
954
955
  info_dialog_popdown (transform_info);

  tool->state    = INACTIVE;
  tool->gdisp    = NULL;
  tool->drawable = NULL;
}

static void
956
957
gimp_transform_tool_bounds (GimpTransformTool *tr_tool,
		            GDisplay          *gdisp)
Nate Summers's avatar
Nate Summers committed
958
959
960
961
962
{
  TileManager   *tiles;
  GimpDrawable  *drawable;
  gint           offset_x, offset_y;

963
964
  tiles    = tr_tool->original;
  drawable = gimp_image_active_drawable (gdisp->gimage);
Nate Summers's avatar
Nate Summers committed
965
966
967
968
969

  /*  find the boundaries  */
  if (tiles)
    {
      tile_manager_get_offsets (tiles,
Nate Summers's avatar
Nate Summers committed
970
971
972
973
				&tr_tool->x1, &tr_tool->y1);
				
      tr_tool->x2 = tr_tool->x1 + tile_manager_width (tiles);
      tr_tool->y2 = tr_tool->y1 + tile_manager_height (tiles);
Nate Summers's avatar
Nate Summers committed
974
975
976
977
978
    }
  else
    {
      gimp_drawable_offsets (drawable, &offset_x, &offset_y);
      gimp_drawable_mask_bounds (drawable,
Nate Summers's avatar
Nate Summers committed
979
980
981
982
983
984
				 &tr_tool->x1, &tr_tool->y1,
				 &tr_tool->x2, &tr_tool->y2);
      tr_tool->x1 += offset_x;
      tr_tool->y1 += offset_y;
      tr_tool->x2 += offset_x;
      tr_tool->y2 += offset_y;
Nate Summers's avatar
Nate Summers committed
985
    }
Nate Summers's avatar
Nate Summers committed
986
987
988

  tr_tool->cx = (tr_tool->x1 + tr_tool->x2) / 2;
  tr_tool->cy = (tr_tool->y1 + tr_tool->y2) / 2;
Nate Summers's avatar
Nate Summers committed
989
990

  /*  changing the bounds invalidates any grid we may have  */
Nate Summers's avatar
Nate Summers committed
991
  gimp_transform_tool_grid_recalc (tr_tool);
Nate Summers's avatar
Nate Summers committed
992
993
994
995
996
}

void
gimp_transform_tool_grid_density_changed (void)
{
Nate Summers's avatar
Nate Summers committed
997
998
  GimpTransformTool *tr_tool;
  GimpDrawTool      *dr_tool;
Nate Summers's avatar
Nate Summers committed
999

1000
  /* EEEK!!! */