gimptransformtool.c 44.3 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"
29

Michael Natterer's avatar
Michael Natterer committed
30
#include "base/tile-manager.h"
31

Michael Natterer's avatar
Michael Natterer committed
32
#include "core/gimp.h"
33
#include "core/gimpchannel.h"
34
#include "core/gimpcontext.h"
Michael Natterer's avatar
Michael Natterer committed
35
#include "core/gimpdrawable-transform.h"
36
37
#include "core/gimpimage.h"
#include "core/gimpimage-mask.h"
38
#include "core/gimpimage-undo.h"
39
#include "core/gimpimage-undo-push.h"
40
#include "core/gimpitem-linked.h"
41
#include "core/gimplayer.h"
Michael Natterer's avatar
Michael Natterer committed
42
#include "core/gimptoolinfo.h"
43

44
45
46
#include "vectors/gimpvectors.h"
#include "vectors/gimpstroke.h"

47
#include "widgets/gimpdialogfactory.h"
Michael Natterer's avatar
Michael Natterer committed
48
49
#include "widgets/gimpviewabledialog.h"

50
#include "display/gimpdisplay.h"
Michael Natterer's avatar
Michael Natterer committed
51
#include "display/gimpprogress.h"
Nate Summers's avatar
Nate Summers committed
52

53
54
55
56
#ifdef __GNUC__
#warning FIXME #include "gui/gui-types.h"
#endif
#include "gui/gui-types.h"
57
58
#include "gui/info-dialog.h"

59
#include "gimptoolcontrol.h"
60
#include "gimptransformoptions.h"
61
62
#include "gimptransformtool.h"
#include "gimptransformtool-undo.h"
63

64
#include "gimp-intl.h"
Nate Summers's avatar
Nate Summers committed
65

66

67
#define HANDLE_SIZE 10
Michael Natterer's avatar
Michael Natterer committed
68

69

Michael Natterer's avatar
Michael Natterer committed
70
71
72
73
74
75
76
/*  local function prototypes  */

static void   gimp_transform_tool_init        (GimpTransformTool      *tool);
static void   gimp_transform_tool_class_init  (GimpTransformToolClass *tool);

static void   gimp_transform_tool_finalize         (GObject           *object);

77
78
static void   gimp_transform_tool_initialize       (GimpTool          *tool,
                                                    GimpDisplay       *gdisp);
Michael Natterer's avatar
Michael Natterer committed
79
static void   gimp_transform_tool_control          (GimpTool          *tool,
80
                                                    GimpToolAction     action,
Michael Natterer's avatar
Michael Natterer committed
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
                                                    GimpDisplay       *gdisp);
static void   gimp_transform_tool_button_press     (GimpTool          *tool,
                                                    GimpCoords        *coords,
                                                    guint32            time,
                                                    GdkModifierType    state,
                                                    GimpDisplay       *gdisp);
static void   gimp_transform_tool_button_release   (GimpTool          *tool,
                                                    GimpCoords        *coords,
                                                    guint32            time,
                                                    GdkModifierType    state,
                                                    GimpDisplay       *gdisp);
static void   gimp_transform_tool_motion           (GimpTool          *tool,
                                                    GimpCoords        *coords,
                                                    guint32            time,
                                                    GdkModifierType    state,
                                                    GimpDisplay       *gdisp);
97
98
99
100
101
static void   gimp_transform_tool_modifier_key     (GimpTool          *tool,
                                                    GdkModifierType    key,
                                                    gboolean           press,
                                                    GdkModifierType    state,
                                                    GimpDisplay       *gdisp);
102
103
104
105
static void   gimp_transform_tool_oper_update      (GimpTool          *tool,
                                                    GimpCoords        *coords,
                                                    GdkModifierType    state,
                                                    GimpDisplay       *gdisp);
Michael Natterer's avatar
Michael Natterer committed
106
107
108
109
110
111
112
static void   gimp_transform_tool_cursor_update    (GimpTool          *tool,
                                                    GimpCoords        *coords,
                                                    GdkModifierType    state,
                                                    GimpDisplay       *gdisp);

static void   gimp_transform_tool_draw             (GimpDrawTool      *draw_tool);

113
114
static TileManager *
              gimp_transform_tool_real_transform   (GimpTransformTool *tr_tool,
115
                                                    GimpItem          *item,
116
117
                                                    GimpDisplay       *gdisp);

118
static void   gimp_transform_tool_halt             (GimpTransformTool *tr_tool);
Michael Natterer's avatar
Michael Natterer committed
119
120
static void   gimp_transform_tool_bounds           (GimpTransformTool *tr_tool,
                                                    GimpDisplay       *gdisp);
Michael Natterer's avatar
Michael Natterer committed
121
122
123
static void   gimp_transform_tool_dialog           (GimpTransformTool *tr_tool);
static void   gimp_transform_tool_prepare          (GimpTransformTool *tr_tool,
                                                    GimpDisplay       *gdisp);
Michael Natterer's avatar
Michael Natterer committed
124
125
126
127
128
129
130
static void   gimp_transform_tool_recalc           (GimpTransformTool *tr_tool,
                                                    GimpDisplay       *gdisp);
static void   gimp_transform_tool_doit             (GimpTransformTool *tr_tool,
                                                    GimpDisplay       *gdisp);
static void   gimp_transform_tool_grid_recalc      (GimpTransformTool *tr_tool);

static void   transform_reset_callback             (GtkWidget         *widget,
Michael Natterer's avatar
Michael Natterer committed
131
132
133
134
135
                                                    GimpTransformTool *tr_tool);
static void   transform_cancel_callback            (GtkWidget         *widget,
                                                    GimpTransformTool *tr_tool);
static void   transform_ok_callback                (GtkWidget         *widget,
                                                    GimpTransformTool *tr_tool);
136

137
static void   gimp_transform_tool_notify_type   (GimpTransformOptions *options,
138
139
                                                 GParamSpec           *pspec,
                                                 GimpTransformTool    *tr_tool);
140
static void   gimp_transform_tool_notify_grid   (GimpTransformOptions *options,
141
142
143
                                                 GParamSpec           *pspec,
                                                 GimpTransformTool    *tr_tool);

144

145
static GimpDrawToolClass *parent_class = NULL;
146

147
148

GType
Nate Summers's avatar
Nate Summers committed
149
150
gimp_transform_tool_get_type (void)
{
151
  static GType tool_type = 0;
Nate Summers's avatar
Nate Summers committed
152
153
154

  if (! tool_type)
    {
155
      static const GTypeInfo tool_info =
Nate Summers's avatar
Nate Summers committed
156
157
      {
        sizeof (GimpTransformToolClass),
158
159
160
161
162
163
164
165
	(GBaseInitFunc) NULL,
	(GBaseFinalizeFunc) NULL,
	(GClassInitFunc) gimp_transform_tool_class_init,
	NULL,           /* class_finalize */
	NULL,           /* class_data     */
	sizeof (GimpTransformTool),
	0,              /* n_preallocs    */
	(GInstanceInitFunc) gimp_transform_tool_init,
Nate Summers's avatar
Nate Summers committed
166
167
      };

168
      tool_type = g_type_register_static (GIMP_TYPE_DRAW_TOOL,
169
					  "GimpTransformTool",
170
                                          &tool_info, 0);
Nate Summers's avatar
Nate Summers committed
171
172
173
174
175
176
177
178
    }

  return tool_type;
}

static void
gimp_transform_tool_class_init (GimpTransformToolClass *klass)
{
179
  GObjectClass      *object_class;
Nate Summers's avatar
Nate Summers committed
180
181
  GimpToolClass     *tool_class;
  GimpDrawToolClass *draw_class;
Nate Summers's avatar
Nate Summers committed
182

183
184
185
  object_class = G_OBJECT_CLASS (klass);
  tool_class   = GIMP_TOOL_CLASS (klass);
  draw_class   = GIMP_DRAW_TOOL_CLASS (klass);
Nate Summers's avatar
Nate Summers committed
186

187
  parent_class = g_type_class_peek_parent (klass);
Nate Summers's avatar
Nate Summers committed
188

189
  object_class->finalize     = gimp_transform_tool_finalize;
Nate Summers's avatar
Nate Summers committed
190

191
  tool_class->initialize     = gimp_transform_tool_initialize;
192
  tool_class->control        = gimp_transform_tool_control;
Nate Summers's avatar
Nate Summers committed
193
194
195
  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;
196
  tool_class->modifier_key   = gimp_transform_tool_modifier_key;
197
  tool_class->oper_update    = gimp_transform_tool_oper_update;
Nate Summers's avatar
Nate Summers committed
198
  tool_class->cursor_update  = gimp_transform_tool_cursor_update;
Nate Summers's avatar
Nate Summers committed
199
200

  draw_class->draw           = gimp_transform_tool_draw;
Michael Natterer's avatar
Michael Natterer committed
201
202
203
204
205

  klass->dialog              = NULL;
  klass->prepare             = NULL;
  klass->motion              = NULL;
  klass->recalc              = NULL;
206
  klass->transform           = gimp_transform_tool_real_transform;
Nate Summers's avatar
Nate Summers committed
207
208
209
}

static void
Michael Natterer's avatar
Michael Natterer committed
210
gimp_transform_tool_init (GimpTransformTool *tr_tool)
Nate Summers's avatar
Nate Summers committed
211
{
Michael Natterer's avatar
Michael Natterer committed
212
  GimpTool *tool;
213
  gint      i;
Nate Summers's avatar
Nate Summers committed
214

Michael Natterer's avatar
Michael Natterer committed
215
  tool = GIMP_TOOL (tr_tool);
Michael Natterer's avatar
Michael Natterer committed
216

Michael Natterer's avatar
Michael Natterer committed
217
218
219
  gimp_tool_control_set_scroll_lock (tool->control, TRUE);
  gimp_tool_control_set_preserve    (tool->control, FALSE);

Michael Natterer's avatar
Michael Natterer committed
220
221
  tr_tool->function = TRANSFORM_CREATING;
  tr_tool->original = NULL;
Nate Summers's avatar
Nate Summers committed
222
223

  for (i = 0; i < TRAN_INFO_SIZE; i++)
224
    {
Michael Natterer's avatar
Michael Natterer committed
225
226
      tr_tool->trans_info[i]     = 0.0;
      tr_tool->old_trans_info[i] = 0.0;
227
    }
Nate Summers's avatar
Nate Summers committed
228

229
  gimp_matrix3_identity (&tr_tool->transform);
230

231
232
233
234
235
236
237
238
  tr_tool->use_grid         = TRUE;
  tr_tool->use_center       = TRUE;
  tr_tool->ngx              = 0;
  tr_tool->ngy              = 0;
  tr_tool->grid_coords      = NULL;
  tr_tool->tgrid_coords     = NULL;

  tr_tool->notify_connected = FALSE;
239
  tr_tool->type             = GIMP_TRANSFORM_TYPE_LAYER;
240
  tr_tool->direction        = GIMP_TRANSFORM_FORWARD;
241

242
243
244
  tr_tool->shell_desc       = NULL;
  tr_tool->progress_text    = _("Transforming...");
  tr_tool->info_dialog      = NULL;
Nate Summers's avatar
Nate Summers committed
245
246
}

247
static void
248
gimp_transform_tool_finalize (GObject *object)
Nate Summers's avatar
Nate Summers committed
249
{
250
  GimpTransformTool *tr_tool;
Nate Summers's avatar
Nate Summers committed
251

252
253
254
  tr_tool = GIMP_TRANSFORM_TOOL (object);

  if (tr_tool->original)
255
    {
256
      tile_manager_unref (tr_tool->original);
257
258
      tr_tool->original = NULL;
    }
259

260
  if (tr_tool->info_dialog)
261
    {
262
263
      info_dialog_free (tr_tool->info_dialog);
      tr_tool->info_dialog = NULL;
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
    }

  if (tr_tool->grid_coords)
    {
      g_free (tr_tool->grid_coords);
      tr_tool->grid_coords = NULL;
    }

  if (tr_tool->tgrid_coords)
    {
      g_free (tr_tool->tgrid_coords);
      tr_tool->tgrid_coords = NULL;
    }

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

281
282
283
284
285
286
287
288
289
static void
gimp_transform_tool_initialize (GimpTool    *tool,
				GimpDisplay *gdisp)
{
  GimpTransformTool *tr_tool = GIMP_TRANSFORM_TOOL (tool);

  if (gdisp != tool->gdisp)
    {
      GimpDrawable *drawable = gimp_image_active_drawable (gdisp->gimage);
290
      gint          i;
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318

      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."));
          return;
        }

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

      /*  Initialize the transform tool dialog */
      if (! tr_tool->info_dialog)
        gimp_transform_tool_dialog (tr_tool);

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

      gimp_transform_tool_prepare (tr_tool, gdisp);

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

319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
      if (tr_tool->use_grid && ! tr_tool->notify_connected)
        {
          tr_tool->type =
            GIMP_TRANSFORM_OPTIONS (tool->tool_info->tool_options)->type;
          tr_tool->direction =
            GIMP_TRANSFORM_OPTIONS (tool->tool_info->tool_options)->direction;

          g_signal_connect_object (tool->tool_info->tool_options,
                                   "notify::type",
                                   G_CALLBACK (gimp_transform_tool_notify_type),
                                   tr_tool, 0);
          g_signal_connect_object (tool->tool_info->tool_options,
                                   "notify::direction",
                                   G_CALLBACK (gimp_transform_tool_notify_type),
                                   tr_tool, 0);
          g_signal_connect_object (tool->tool_info->tool_options,
                                   "notify::grid-type",
                                   G_CALLBACK (gimp_transform_tool_notify_grid),
                                   tr_tool, 0);
          g_signal_connect_object (tool->tool_info->tool_options,
                                   "notify::grid-size",
                                   G_CALLBACK (gimp_transform_tool_notify_grid),
                                   tr_tool, 0);

          tr_tool->notify_connected = TRUE;
        }

346
347
348
349
350
351
352
353
354
355
356
      /*  start drawing the bounding box and handles...  */
      gimp_draw_tool_start (GIMP_DRAW_TOOL (tool), gdisp);

      tr_tool->function = TRANSFORM_CREATING;

      /*  Save the current transformation info  */
      for (i = 0; i < TRAN_INFO_SIZE; i++)
	tr_tool->old_trans_info[i] = tr_tool->trans_info[i];
    }
}

357
static void
358
359
360
gimp_transform_tool_control (GimpTool       *tool,
			     GimpToolAction  action,
			     GimpDisplay    *gdisp)
361
{
Michael Natterer's avatar
Michael Natterer committed
362
  GimpTransformTool *tr_tool;
363

Michael Natterer's avatar
Michael Natterer committed
364
  tr_tool = GIMP_TRANSFORM_TOOL (tool);
365

366
367
368
369
  switch (action)
    {
    case PAUSE:
      break;
370

371
    case RESUME:
Michael Natterer's avatar
Michael Natterer committed
372
      gimp_transform_tool_recalc (tr_tool, gdisp);
373
      break;
374

375
    case HALT:
376
      gimp_transform_tool_halt (tr_tool);
377
      return; /* don't upchain */
378
      break;
379

380
381
382
383
    default:
      break;
    }

Michael Natterer's avatar
Michael Natterer committed
384
  GIMP_TOOL_CLASS (parent_class)->control (tool, action, gdisp);
385
386
387
}

static void
388
389
390
391
392
gimp_transform_tool_button_press (GimpTool        *tool,
                                  GimpCoords      *coords,
                                  guint32          time,
                                  GdkModifierType  state,
			          GimpDisplay     *gdisp)
Nate Summers's avatar
Nate Summers committed
393
{
Michael Natterer's avatar
Michael Natterer committed
394
  GimpTransformTool *tr_tool;
Nate Summers's avatar
Nate Summers committed
395

396
  tr_tool = GIMP_TRANSFORM_TOOL (tool);
Nate Summers's avatar
Nate Summers committed
397

398
399
  if (tr_tool->function == TRANSFORM_CREATING && tr_tool->use_grid)
    gimp_transform_tool_oper_update (tool, coords, state, gdisp);
400

401
402
  tr_tool->lastx = tr_tool->startx = coords->x;
  tr_tool->lasty = tr_tool->starty = coords->y;
Nate Summers's avatar
Nate Summers committed
403

404
  gimp_tool_control_activate (tool->control);
Nate Summers's avatar
Nate Summers committed
405
406
}

407
static void
408
409
410
411
412
gimp_transform_tool_button_release (GimpTool        *tool,
                                    GimpCoords      *coords,
                                    guint32          time,
			            GdkModifierType  state,
			            GimpDisplay     *gdisp)
Nate Summers's avatar
Nate Summers committed
413
{
Michael Natterer's avatar
Michael Natterer committed
414
  GimpTransformTool *tr_tool;
Nate Summers's avatar
Nate Summers committed
415
  gint               i;
Nate Summers's avatar
Nate Summers committed
416

Michael Natterer's avatar
Michael Natterer committed
417
  tr_tool = GIMP_TRANSFORM_TOOL (tool);
Nate Summers's avatar
Nate Summers committed
418
419

  /*  if we are creating, there is nothing to be done...exit  */
420
  if (tr_tool->function == TRANSFORM_CREATING && tr_tool->use_grid)
Nate Summers's avatar
Nate Summers committed
421
422
423
    return;

  /*  if the 3rd button isn't pressed, transform the selected mask  */
424
  if (! (state & GDK_BUTTON3_MASK))
Nate Summers's avatar
Nate Summers committed
425
426
    {
      /* Shift-clicking is another way to approve the transform  */
427
      if ((state & GDK_SHIFT_MASK) || ! tr_tool->use_grid)
Nate Summers's avatar
Nate Summers committed
428
	{
Michael Natterer's avatar
Michael Natterer committed
429
	  gimp_transform_tool_doit (tr_tool, gdisp);
Nate Summers's avatar
Nate Summers committed
430
431
432
433
	}
    }
  else
    {
434
      gimp_draw_tool_pause (GIMP_DRAW_TOOL (tool));
Nate Summers's avatar
Nate Summers committed
435
436
437

      /*  Restore the previous transformation info  */
      for (i = 0; i < TRAN_INFO_SIZE; i++)
438
	tr_tool->trans_info[i] = tr_tool->old_trans_info[i];
Nate Summers's avatar
Nate Summers committed
439
440

      /*  recalculate the tool's transformation matrix  */
Michael Natterer's avatar
Michael Natterer committed
441
      gimp_transform_tool_recalc (tr_tool, gdisp);
Nate Summers's avatar
Nate Summers committed
442

443
      gimp_draw_tool_resume (GIMP_DRAW_TOOL (tool));
Nate Summers's avatar
Nate Summers committed
444
    }
445
446

  gimp_tool_control_halt (tool->control);
Nate Summers's avatar
Nate Summers committed
447
448
}

449
static void
450
451
452
453
454
gimp_transform_tool_motion (GimpTool        *tool,
                            GimpCoords      *coords,
                            guint32          time,
		            GdkModifierType  state,
		            GimpDisplay     *gdisp)
Nate Summers's avatar
Nate Summers committed
455
{
Michael Natterer's avatar
Michael Natterer committed
456
457
  GimpTransformToolClass *tr_tool_class;
  GimpTransformTool      *tr_tool;
Nate Summers's avatar
Nate Summers committed
458

Michael Natterer's avatar
Michael Natterer committed
459
  tr_tool = GIMP_TRANSFORM_TOOL (tool);
Nate Summers's avatar
Nate Summers committed
460

461
  /*  if we are creating, there is nothing to be done so exit.  */
462
  if (tr_tool->function == TRANSFORM_CREATING || ! tr_tool->use_grid)
Nate Summers's avatar
Nate Summers committed
463
464
    return;

465
  gimp_draw_tool_pause (GIMP_DRAW_TOOL (tool));
Nate Summers's avatar
Nate Summers committed
466

Michael Natterer's avatar
Michael Natterer committed
467
468
469
  tr_tool->curx  = coords->x;
  tr_tool->cury  = coords->y;
  tr_tool->state = state;
Nate Summers's avatar
Nate Summers committed
470
471

  /*  recalculate the tool's transformation matrix  */
Michael Natterer's avatar
Michael Natterer committed
472
473
474
475
476
  tr_tool_class = GIMP_TRANSFORM_TOOL_GET_CLASS (tr_tool);

  if (tr_tool_class->motion)
    {
      tr_tool_class->motion (tr_tool, gdisp);
Nate Summers's avatar
Nate Summers committed
477

Michael Natterer's avatar
Michael Natterer committed
478
479
480
481
482
483
      if (tr_tool_class->recalc)
        tr_tool_class->recalc (tr_tool, gdisp);
    }

  tr_tool->lastx = tr_tool->curx;
  tr_tool->lasty = tr_tool->cury;
Nate Summers's avatar
Nate Summers committed
484

485
  gimp_draw_tool_resume (GIMP_DRAW_TOOL (tool));
Nate Summers's avatar
Nate Summers committed
486
487
}

488
489
490
491
492
493
494
static void
gimp_transform_tool_modifier_key (GimpTool        *tool,
                                  GdkModifierType  key,
                                  gboolean         press,
                                  GdkModifierType  state,
                                  GimpDisplay     *gdisp)
{
495
  GimpTransformOptions *options;
496

497
  options = GIMP_TRANSFORM_OPTIONS (tool->tool_info->tool_options);
498

499
  if (key == GDK_CONTROL_MASK)
500
    {
501
      g_object_set (options,
502
503
                    "constrain-1", ! options->constrain_1,
                    NULL);
504
    }
505
  else if (key == GDK_MOD1_MASK)
506
    {
507
      g_object_set (options,
508
509
                    "constrain-2", ! options->constrain_2,
                    NULL);
510
511
512
    }
}

513
514
515
516
517
518
519
520
521
522
523
524
static void
gimp_transform_tool_oper_update (GimpTool        *tool,
                                 GimpCoords      *coords,
                                 GdkModifierType  state,
                                 GimpDisplay     *gdisp)
{
  GimpTransformTool *tr_tool;
  GimpDrawTool      *draw_tool;

  tr_tool   = GIMP_TRANSFORM_TOOL (tool);
  draw_tool = GIMP_DRAW_TOOL (tool);

525
526
527
  if (! tr_tool->use_grid)
    return;

528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
  if (gdisp == tool->gdisp)
    {
      gdouble closest_dist;
      gdouble dist;

      closest_dist = gimp_draw_tool_calc_distance (draw_tool, gdisp,
                                                   coords->x, coords->y,
                                                   tr_tool->tx1, tr_tool->ty1);
      tr_tool->function = TRANSFORM_HANDLE_1;

      dist = gimp_draw_tool_calc_distance (draw_tool, gdisp,
                                           coords->x, coords->y,
                                           tr_tool->tx2, tr_tool->ty2);
      if (dist < closest_dist)
	{
	  closest_dist = dist;
	  tr_tool->function = TRANSFORM_HANDLE_2;
	}

      dist = gimp_draw_tool_calc_distance (draw_tool, gdisp,
                                           coords->x, coords->y,
                                           tr_tool->tx3, tr_tool->ty3);
      if (dist < closest_dist)
	{
	  closest_dist = dist;
	  tr_tool->function = TRANSFORM_HANDLE_3;
	}

      dist = gimp_draw_tool_calc_distance (draw_tool, gdisp,
                                           coords->x, coords->y,
                                           tr_tool->tx4, tr_tool->ty4);
      if (dist < closest_dist)
	{
	  closest_dist = dist;
	  tr_tool->function = TRANSFORM_HANDLE_4;
	}

      if (gimp_draw_tool_on_handle (draw_tool, gdisp,
                                    coords->x, coords->y,
                                    GIMP_HANDLE_CIRCLE,
                                    tr_tool->tcx, tr_tool->tcy,
569
                                    HANDLE_SIZE, HANDLE_SIZE,
570
571
572
573
574
575
576
577
                                    GTK_ANCHOR_CENTER,
                                    FALSE))
	{
	  tr_tool->function = TRANSFORM_HANDLE_CENTER;
	}
    }
}

578
static void
579
580
581
582
gimp_transform_tool_cursor_update (GimpTool        *tool,
                                   GimpCoords      *coords,
			           GdkModifierType  state,
			           GimpDisplay     *gdisp)
Nate Summers's avatar
Nate Summers committed
583
{
584
585
  GimpTransformTool    *tr_tool;
  GimpTransformOptions *options;
586
587

  tr_tool = GIMP_TRANSFORM_TOOL (tool);
588
  options = GIMP_TRANSFORM_OPTIONS (tool->tool_info->tool_options);
Nate Summers's avatar
Nate Summers committed
589

Michael Natterer's avatar
Michael Natterer committed
590
  if (tr_tool->use_grid)
Nate Summers's avatar
Nate Summers committed
591
    {
Michael Natterer's avatar
Michael Natterer committed
592
593
      GdkCursorType      ctype     = GDK_TOP_LEFT_ARROW;
      GimpCursorModifier cmodifier = GIMP_CURSOR_MODIFIER_NONE;
594

595
      switch (options->type)
Michael Natterer's avatar
Michael Natterer committed
596
        {
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
        case GIMP_TRANSFORM_TYPE_LAYER:
          {
            GimpDrawable *drawable;

            drawable = gimp_image_active_drawable (gdisp->gimage);

            if (drawable)
              {
                if (GIMP_IS_LAYER (drawable) &&
                    gimp_layer_get_mask (GIMP_LAYER (drawable)))
                  {
                    ctype = GIMP_BAD_CURSOR;
                  }
                else if (gimp_display_coords_in_active_drawable (gdisp, coords))
                  {
                    if (gimp_image_mask_is_empty (gdisp->gimage) ||
                        gimp_image_mask_value (gdisp->gimage,
                                               coords->x, coords->y))
                      {
                        ctype = GIMP_MOUSE_CURSOR;
                      }
                  }
              }
          }
          break;

        case GIMP_TRANSFORM_TYPE_SELECTION:
          if (gimp_image_mask_is_empty (gdisp->gimage) ||
              gimp_image_mask_value (gdisp->gimage, coords->x, coords->y))
Michael Natterer's avatar
Michael Natterer committed
626
            {
627
              ctype = GIMP_MOUSE_CURSOR;
Michael Natterer's avatar
Michael Natterer committed
628
            }
629
630
631
632
633
634
635
636
          break;

        case GIMP_TRANSFORM_TYPE_PATH:
          if (gimp_image_get_active_vectors (gdisp->gimage))
            ctype = GIMP_MOUSE_CURSOR;
          else
            ctype = GIMP_BAD_CURSOR;
          break;
Michael Natterer's avatar
Michael Natterer committed
637
        }
638

Michael Natterer's avatar
Michael Natterer committed
639
640
641
642
643
644
645
646
      if (tr_tool->use_center && tr_tool->function == TRANSFORM_HANDLE_CENTER)
        {
          cmodifier = GIMP_CURSOR_MODIFIER_MOVE;
        }

      gimp_tool_control_set_cursor          (tool->control, ctype);
      gimp_tool_control_set_cursor_modifier (tool->control, cmodifier);
    }
647
648

  GIMP_TOOL_CLASS (parent_class)->cursor_update (tool, coords, state, gdisp);
Nate Summers's avatar
Nate Summers committed
649
650
}

651
static void
652
gimp_transform_tool_draw (GimpDrawTool *draw_tool)
Nate Summers's avatar
Nate Summers committed
653
{
654
  GimpTool             *tool;
655
656
  GimpTransformTool    *tr_tool;
  GimpTransformOptions *options;
657
658
  gdouble z1, z2, z3, z4;

659
660

  tr_tool = GIMP_TRANSFORM_TOOL (draw_tool);
Nate Summers's avatar
Nate Summers committed
661

662
663
664
  if (! tr_tool->use_grid)
    return;

665
  tool    = GIMP_TOOL (draw_tool);
666
  options = GIMP_TRANSFORM_OPTIONS (tool->tool_info->tool_options);
667

Nate Summers's avatar
Nate Summers committed
668
  /*  draw the bounding box  */
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
  gimp_draw_tool_draw_line (draw_tool,
                            tr_tool->tx1, tr_tool->ty1,
                            tr_tool->tx2, tr_tool->ty2,
                            FALSE);
  gimp_draw_tool_draw_line (draw_tool,
                            tr_tool->tx2, tr_tool->ty2,
                            tr_tool->tx4, tr_tool->ty4,
                            FALSE);
  gimp_draw_tool_draw_line (draw_tool,
                            tr_tool->tx3, tr_tool->ty3,
                            tr_tool->tx4, tr_tool->ty4,
                            FALSE);
  gimp_draw_tool_draw_line (draw_tool,
                            tr_tool->tx3, tr_tool->ty3,
                            tr_tool->tx1, tr_tool->ty1,
                            FALSE);
Nate Summers's avatar
Nate Summers committed
685

686
687
688
689
690
691
692
693
694
695
696
697
698
  /* We test if the transformed polygon is convex.
   * if z1 and z2 have the same sign as well as z3 and z4
   * the polygon is convex. */

  z1 = (tr_tool->tx2-tr_tool->tx1)*(tr_tool->ty4-tr_tool->ty1)
          -(tr_tool->tx4-tr_tool->tx1)*(tr_tool->ty2-tr_tool->ty1);
  z2 = (tr_tool->tx4-tr_tool->tx1)*(tr_tool->ty3-tr_tool->ty1)
          -(tr_tool->tx3-tr_tool->tx1)*(tr_tool->ty4-tr_tool->ty1);
  z3 = (tr_tool->tx4-tr_tool->tx2)*(tr_tool->ty3-tr_tool->ty2)
          -(tr_tool->tx3-tr_tool->tx2)*(tr_tool->ty4-tr_tool->ty2);
  z4 = (tr_tool->tx3-tr_tool->tx2)*(tr_tool->ty1-tr_tool->ty2)
          -(tr_tool->tx1-tr_tool->tx2)*(tr_tool->ty3-tr_tool->ty2);

699
  /*  Draw the grid (not for path transform since it looks ugly)  */
Nate Summers's avatar
Nate Summers committed
700

701
702
703
  if (tr_tool->type != GIMP_TRANSFORM_TYPE_PATH &&
      tr_tool->grid_coords                      &&
      tr_tool->tgrid_coords                     &&
704
705
      z1 * z2 > 0                               &&
      z3 * z4 > 0)
Nate Summers's avatar
Nate Summers committed
706
    {
707
708
      gint gci, i, k;

Nate Summers's avatar
Nate Summers committed
709
      k = tr_tool->ngx + tr_tool->ngy;
710

711
      for (i = 0, gci = 0; i < k; i++, gci += 4)
Nate Summers's avatar
Nate Summers committed
712
	{
713
714
715
716
717
718
          gimp_draw_tool_draw_line (draw_tool,
                                    tr_tool->tgrid_coords[gci],
                                    tr_tool->tgrid_coords[gci + 1],
                                    tr_tool->tgrid_coords[gci + 2],
                                    tr_tool->tgrid_coords[gci + 3],
                                    FALSE);
Nate Summers's avatar
Nate Summers committed
719
720
721
722
	}
    }

  /*  draw the tool handles  */
723
724
725
  gimp_draw_tool_draw_handle (draw_tool,
                              GIMP_HANDLE_SQUARE,
                              tr_tool->tx1, tr_tool->ty1,
726
                              HANDLE_SIZE, HANDLE_SIZE,
727
728
729
730
731
                              GTK_ANCHOR_CENTER,
                              FALSE);
  gimp_draw_tool_draw_handle (draw_tool,
                              GIMP_HANDLE_SQUARE,
                              tr_tool->tx2, tr_tool->ty2,
732
                              HANDLE_SIZE, HANDLE_SIZE,
733
734
735
736
737
                              GTK_ANCHOR_CENTER,
                              FALSE);
  gimp_draw_tool_draw_handle (draw_tool,
                              GIMP_HANDLE_SQUARE,
                              tr_tool->tx3, tr_tool->ty3,
738
                              HANDLE_SIZE, HANDLE_SIZE,
739
740
741
742
743
                              GTK_ANCHOR_CENTER,
                              FALSE);
  gimp_draw_tool_draw_handle (draw_tool,
                              GIMP_HANDLE_SQUARE,
                              tr_tool->tx4, tr_tool->ty4,
744
                              HANDLE_SIZE, HANDLE_SIZE,
745
746
                              GTK_ANCHOR_CENTER,
                              FALSE);
Nate Summers's avatar
Nate Summers committed
747
748

  /*  draw the center  */
749
750
751
752
753
  if (tr_tool->use_center)
    {
      gimp_draw_tool_draw_handle (draw_tool,
                                  GIMP_HANDLE_FILLED_CIRCLE,
                                  tr_tool->tcx, tr_tool->tcy,
754
                                  HANDLE_SIZE, HANDLE_SIZE,
755
756
757
                                  GTK_ANCHOR_CENTER,
                                  FALSE);
    }
Nate Summers's avatar
Nate Summers committed
758

759
  if (tr_tool->type == GIMP_TRANSFORM_TYPE_PATH)
Nate Summers's avatar
Nate Summers committed
760
    {
761
762
763
      GimpVectors *vectors;
      GimpStroke  *stroke = NULL;
      GimpMatrix3  matrix = tr_tool->transform;
764

765
766
767
      vectors = gimp_image_get_active_vectors (tool->gdisp->gimage);

      if (vectors)
768
        {
769
770
771
772
773
774
775
776
777
778
779
          if (tr_tool->direction == GIMP_TRANSFORM_BACKWARD)
            gimp_matrix3_invert (&matrix);

          while ((stroke = gimp_vectors_stroke_get_next (vectors, stroke)))
            {
              GArray   *coords;
              gboolean  closed;
              gint      i;

              coords = gimp_stroke_interpolate (stroke, 1.0, &closed);

780
              if (coords)
781
                {
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
                  for (i = 0; i < coords->len; i++)
                    {
                      GimpCoords *curr = &g_array_index (coords, GimpCoords, i);

                      gimp_matrix3_transform_point (&matrix,
                                                    curr->x, curr->y,
                                                    &curr->x, &curr->y);
                    }

                  if (coords->len)
                    gimp_draw_tool_draw_strokes (draw_tool,
                                                 &g_array_index (coords,
                                                                 GimpCoords, 0),
                                                 coords->len, FALSE, FALSE);

                  g_array_free (coords, TRUE);
798
799
                }
            }
800
        }
Nate Summers's avatar
Nate Summers committed
801
802
803
    }
}

804
805
static TileManager *
gimp_transform_tool_real_transform (GimpTransformTool *tr_tool,
806
                                    GimpItem          *active_item,
807
808
                                    GimpDisplay       *gdisp)
{
809
810
811
  GimpTool             *tool;
  GimpTransformOptions *options;
  GimpProgress         *progress;
812
  TileManager          *ret = NULL;
813

814
815
  tool    = GIMP_TOOL (tr_tool);
  options = GIMP_TRANSFORM_OPTIONS (tool->tool_info->tool_options);
816
817
818
819
820
821
822

  if (tr_tool->info_dialog)
    gtk_widget_set_sensitive (GTK_WIDGET (tr_tool->info_dialog->shell), FALSE);

  progress = gimp_progress_start (gdisp, tr_tool->progress_text, FALSE,
                                  NULL, NULL);

823
  if (gimp_item_get_linked (active_item))
824
    gimp_item_linked_transform (active_item, &tr_tool->transform,
825
826
827
828
829
                                options->direction,
                                options->interpolation, options->clip,
                                progress ?
                                gimp_progress_update_and_flush : NULL,
                                progress);
830

831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
  switch (options->type)
    {
    case GIMP_TRANSFORM_TYPE_LAYER:
    case GIMP_TRANSFORM_TYPE_SELECTION:
      {
        gboolean clip_result = options->clip;

        /*  always clip the selction and unfloated channels
         *  so they keep their size
         */
        if (GIMP_IS_CHANNEL (active_item) &&
            tile_manager_bpp (tr_tool->original) == 1)
          clip_result = TRUE;

        ret =
          gimp_drawable_transform_tiles_affine (GIMP_DRAWABLE (active_item),
                                                tr_tool->original,
848
                                                &tr_tool->transform,
849
850
851
852
                                                options->direction,
                                                options->interpolation,
                                                clip_result,
                                                progress ?
853
                                                gimp_progress_update_and_flush :
854
855
856
857
                                                NULL,
                                                progress);
      }
      break;
858

859
    case GIMP_TRANSFORM_TYPE_PATH:
860
861
862
863
864
865
866
867
868
      gimp_item_transform (active_item,
                           &tr_tool->transform,
                           options->direction,
                           options->interpolation,
                           options->clip,
                           progress ?
                           gimp_progress_update_and_flush :
                           NULL,
                           progress);
869
870
      break;
    }
871
872
873
874
875
876
877

  if (progress)
    gimp_progress_end (progress);

  return ret;
}

Michael Natterer's avatar
Michael Natterer committed
878
879
880
881
static void
gimp_transform_tool_doit (GimpTransformTool  *tr_tool,
		          GimpDisplay        *gdisp)
{
882
883
  GimpTool             *tool;
  GimpTransformOptions *options;
884
  GimpItem             *active_item = NULL;
885
886
  TileManager          *new_tiles;
  gboolean              new_layer;
Michael Natterer's avatar
Michael Natterer committed
887

888
889
  tool    = GIMP_TOOL (tr_tool);
  options = GIMP_TRANSFORM_OPTIONS (tool->tool_info->tool_options);
Michael Natterer's avatar
Michael Natterer committed
890

891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
  switch (options->type)
    {
    case GIMP_TRANSFORM_TYPE_LAYER:
      active_item = (GimpItem *) gimp_image_active_drawable (gdisp->gimage);
      break;

    case GIMP_TRANSFORM_TYPE_SELECTION:
      active_item = (GimpItem *) gimp_image_get_mask (gdisp->gimage);
      break;

    case GIMP_TRANSFORM_TYPE_PATH:
      active_item = (GimpItem *) gimp_image_get_active_vectors (gdisp->gimage);
      break;
    }

  if (! active_item)
    return;

  gimp_set_busy (gdisp->gimage->gimp);

Michael Natterer's avatar
Michael Natterer committed
911
  /* undraw the tool before we muck around with the transform matrix */
912
  gimp_draw_tool_stop (GIMP_DRAW_TOOL (tr_tool));
Michael Natterer's avatar
Michael Natterer committed
913

914
  /*  We're going to dirty this image, but we want to keep the tool around  */
915
  gimp_tool_control_set_preserve (tool->control, TRUE);
Michael Natterer's avatar
Michael Natterer committed
916
917

  /*  Start a transform undo group  */
918
  gimp_image_undo_group_start (gdisp->gimage, GIMP_UNDO_GROUP_TRANSFORM,
919
                               tool->tool_info->blurb);
Michael Natterer's avatar
Michael Natterer committed
920
921
922
923
924
925
926
927
928
929
930
931

  /* With the old UI, if original is NULL, then this is the
   * first transformation. In the new UI, it is always so, right?
   */
  g_assert (tr_tool->original == NULL);

  /*  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);

932
933
934
935
936
937
938
939
  switch (options->type)
    {
    case GIMP_TRANSFORM_TYPE_LAYER:
      tr_tool->original = gimp_drawable_transform_cut (tool->drawable,
                                                       &new_layer);
      break;

    case GIMP_TRANSFORM_TYPE_SELECTION:
940
      tr_tool->original = tile_manager_ref (GIMP_DRAWABLE (active_item)->tiles);
941
942
943
944
945
946
947
      tile_manager_set_offsets (tr_tool->original, 0, 0);
      break;

    case GIMP_TRANSFORM_TYPE_PATH:
      tr_tool->original = NULL;
      break;
    }
Michael Natterer's avatar
Michael Natterer committed
948
949
950

  /*  Send the request for the transformation to the tool...
   */
951
  new_tiles = GIMP_TRANSFORM_TOOL_GET_CLASS (tr_tool)->transform (tr_tool,
952
                                                                  active_item,
953
                                                                  gdisp);
Michael Natterer's avatar
Michael Natterer committed
954

Michael Natterer's avatar
Michael Natterer committed
955
  gimp_transform_tool_prepare (tr_tool, gdisp);
Michael Natterer's avatar
Michael Natterer committed
956
957
  gimp_transform_tool_recalc (tr_tool, gdisp);

958
  switch (options->type)
Michael Natterer's avatar
Michael Natterer committed
959
    {
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
    case GIMP_TRANSFORM_TYPE_LAYER:
      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_drawable_transform_paste (tool->drawable,
                                         new_tiles,
                                         new_layer);
          tile_manager_unref (new_tiles);
        }
      break;

     case GIMP_TRANSFORM_TYPE_SELECTION:
      if (new_tiles)
        {
          gimp_image_mask_push_undo (gdisp->gimage, NULL);
Michael Natterer's avatar
Michael Natterer committed
978

979
          tile_manager_unref (GIMP_DRAWABLE (active_item)->tiles);
980
981
982
983
984
985
          GIMP_DRAWABLE (active_item)->tiles = new_tiles;

          GIMP_CHANNEL (active_item)->bounds_known = FALSE;

          gimp_image_mask_changed (gdisp->gimage);
        }
986
987
988

      tile_manager_unref (tr_tool->original);
      tr_tool->original = NULL;
989
990
991
      break;

    case GIMP_TRANSFORM_TYPE_PATH:
992
      /*  Nothing to be done  */
993
      break;
Michael Natterer's avatar
Michael Natterer committed
994
995
    }

996
997
998
999
1000
1001
1002
1003
1004
1005
1006
  /*  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);

  gimp_transform_tool_push_undo (gdisp->gimage, NULL,
                                 tool->ID,
                                 G_TYPE_FROM_INSTANCE (tool),
                                 tr_tool->old_trans_info,
                                 NULL);

Michael Natterer's avatar
Michael Natterer committed
1007
  /*  push the undo group end  */
1008
  gimp_image_undo_group_end (gdisp->gimage);
Michael Natterer's avatar
Michael Natterer committed
1009
1010
1011
1012

  /*  We're done dirtying the image, and would like to be restarted
   *  if the image gets dirty while the tool exists
   */
1013
  gimp_tool_control_set_preserve (tool->control, FALSE);
Michael Natterer's avatar
Michael Natterer committed
1014
1015
1016

  gimp_unset_busy (gdisp->gimage->gimp);

1017
  gimp_image_flush (gdisp->gimage);
Michael Natterer's avatar
Michael Natterer committed
1018

1019
  gimp_transform_tool_halt (tr_tool);
Michael Natterer's avatar
Michael Natterer committed
1020
1021
}

Nate Summers's avatar
Nate Summers committed
1022
void
Nate Summers's avatar
Nate Summers committed
1023
gimp_transform_tool_transform_bounding_box (GimpTransformTool *tr_tool)
Nate Summers's avatar
Nate Summers committed
1024
{
1025
  g_return_if_fail (GIMP_IS_TRANSFORM_TOOL (tr_tool));
Nate Summers's avatar
Nate Summers committed
1026

1027
  gimp_matrix3_transform_point (&tr_tool->transform,
Nate Summers's avatar
Nate Summers committed
1028
1029
				tr_tool->x1, tr_tool->y1,
				&tr_tool->tx1, &tr_tool->ty1);
1030
  gimp_matrix3_transform_point (&tr_tool->transform,
Nate Summers's avatar
Nate Summers committed
1031
1032
				tr_tool->x2, tr_tool->y1,
				&tr_tool->tx2, &tr_tool->ty2);
1033
  gimp_matrix3_transform_point (&tr_tool->transform,
Nate Summers's avatar
Nate Summers committed
1034
1035
				tr_tool->x1, tr_tool->y2,
				&tr_tool->tx3, &tr_tool->ty3);
1036
  gimp_matrix3_transform_point (&tr_tool->transform,
Nate Summers's avatar
Nate Summers committed
1037
1038
				tr_tool->x2, tr_tool->y2,
				&tr_tool->tx4, &tr_tool->ty4);
Nate Summers's avatar
Nate Summers committed
1039

1040
  gimp_matrix3_transform_point (&tr_tool->transform,
1041
1042
				tr_tool->cx, tr_tool->cy,
				&tr_tool->tcx, &tr_tool->tcy);
Nate Summers's avatar
Nate Summers committed
1043

1044
  if (tr_tool->grid_coords != NULL && tr_tool->tgrid_coords != NULL)
Nate Summers's avatar
Nate Summers committed
1045
    {
1046
1047
1048
      gint i, k;
      gint gci;