1
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
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
|
/* GIMP - The GNU 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 3 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, see <https://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <gdk-pixbuf/gdk-pixbuf.h>
#include <gegl.h>
#include "core-types.h"
#include "gimp.h"
#include "gimpcontainer.h"
#include "gimpguide.h"
#include "gimpgrouplayer.h"
#include "gimpimage.h"
#include "gimpimage-guides.h"
#include "gimpimage-sample-points.h"
#include "gimpimage-scale.h"
#include "gimpimage-undo.h"
#include "gimpimage-undo-push.h"
#include "gimplayer.h"
#include "gimpobjectqueue.h"
#include "gimpprogress.h"
#include "gimpprojection.h"
#include "gimpsamplepoint.h"
#include "gimp-log.h"
#include "gimp-intl.h"
void
gimp_image_scale (GimpImage *image,
gint new_width,
gint new_height,
GimpInterpolationType interpolation_type,
GimpProgress *progress)
{
GimpObjectQueue *queue;
GimpItem *item;
GList *list;
gint old_width;
gint old_height;
gint offset_x;
gint offset_y;
gdouble img_scale_w = 1.0;
gdouble img_scale_h = 1.0;
g_return_if_fail (GIMP_IS_IMAGE (image));
g_return_if_fail (new_width > 0 && new_height > 0);
g_return_if_fail (progress == NULL || GIMP_IS_PROGRESS (progress));
gimp_set_busy (image->gimp);
queue = gimp_object_queue_new (progress);
progress = GIMP_PROGRESS (queue);
gimp_object_queue_push_container (queue, gimp_image_get_layers (image));
gimp_object_queue_push (queue, gimp_image_get_mask (image));
gimp_object_queue_push_container (queue, gimp_image_get_channels (image));
gimp_object_queue_push_container (queue, gimp_image_get_vectors (image));
g_object_freeze_notify (G_OBJECT (image));
gimp_image_undo_group_start (image, GIMP_UNDO_GROUP_IMAGE_SCALE,
C_("undo-type", "Scale Image"));
old_width = gimp_image_get_width (image);
old_height = gimp_image_get_height (image);
img_scale_w = (gdouble) new_width / (gdouble) old_width;
img_scale_h = (gdouble) new_height / (gdouble) old_height;
offset_x = (old_width - new_width) / 2;
offset_y = (old_height - new_height) / 2;
/* Push the image size to the stack */
gimp_image_undo_push_image_size (image,
NULL,
offset_x,
offset_y,
new_width,
new_height);
/* Set the new width and height early, so below image item setters
* (esp. guides and sample points) don't choke about moving stuff
* out of the image
*/
g_object_set (image,
"width", new_width,
"height", new_height,
NULL);
/* Scale all layers, channels (including selection mask), and vectors */
while ((item = gimp_object_queue_pop (queue)))
{
if (! gimp_item_scale_by_factors (item,
img_scale_w, img_scale_h,
interpolation_type, progress))
{
/* Since 0 < img_scale_w, img_scale_h, failure due to one or more
* vanishing scaled layer dimensions. Implicit delete implemented
* here. Upstream warning implemented in resize_check_layer_scaling(),
* which offers the user the chance to bail out.
*/
g_return_if_fail (GIMP_IS_LAYER (item));
gimp_image_remove_layer (image, GIMP_LAYER (item), TRUE, NULL);
}
}
/* Scale all Guides */
for (list = gimp_image_get_guides (image);
list;
list = g_list_next (list))
{
GimpGuide *guide = list->data;
gint position = gimp_guide_get_position (guide);
switch (gimp_guide_get_orientation (guide))
{
case GIMP_ORIENTATION_HORIZONTAL:
gimp_image_move_guide (image, guide,
(position * new_height) / old_height,
TRUE);
break;
case GIMP_ORIENTATION_VERTICAL:
gimp_image_move_guide (image, guide,
(position * new_width) / old_width,
TRUE);
break;
default:
break;
}
}
/* Scale all sample points */
for (list = gimp_image_get_sample_points (image);
list;
list = g_list_next (list))
{
GimpSamplePoint *sample_point = list->data;
gint x;
gint y;
gimp_sample_point_get_position (sample_point, &x, &y);
gimp_image_move_sample_point (image, sample_point,
x * new_width / old_width,
y * new_height / old_height,
TRUE);
}
gimp_image_undo_group_end (image);
g_object_unref (queue);
gimp_image_size_changed_detailed (image,
-offset_x,
-offset_y,
old_width,
old_height);
g_object_thaw_notify (G_OBJECT (image));
gimp_unset_busy (image->gimp);
}
/**
* gimp_image_scale_check:
* @image: A #GimpImage.
* @new_width: The new width.
* @new_height: The new height.
* @max_memsize: The maximum new memory size.
* @new_memsize: The new memory size.
*
* Inventory the layer list in image and check that it may be
* scaled to @new_height and @new_width without problems.
*
* Return value: #GIMP_IMAGE_SCALE_OK if scaling the image will shrink none
* of its layers completely away, and the new image size
* is smaller than @max_memsize.
* #GIMP_IMAGE_SCALE_TOO_SMALL if scaling would remove some
* existing layers.
* #GIMP_IMAGE_SCALE_TOO_BIG if the new image size would
* exceed the maximum specified in the preferences.
**/
GimpImageScaleCheckType
gimp_image_scale_check (GimpImage *image,
gint new_width,
gint new_height,
gint64 max_memsize,
gint64 *new_memsize)
{
GList *all_layers;
GList *list;
gint64 current_size;
gint64 undo_size;
gint64 redo_size;
gint64 new_size;
g_return_val_if_fail (GIMP_IS_IMAGE (image), GIMP_IMAGE_SCALE_TOO_SMALL);
g_return_val_if_fail (new_memsize != NULL, GIMP_IMAGE_SCALE_TOO_SMALL);
current_size = gimp_object_get_memsize (GIMP_OBJECT (image), NULL);
new_size = gimp_image_estimate_memsize (image,
gimp_image_get_component_type (image),
new_width, new_height);
undo_size = gimp_object_get_memsize (GIMP_OBJECT (gimp_image_get_undo_stack (image)), NULL);
redo_size = gimp_object_get_memsize (GIMP_OBJECT (gimp_image_get_redo_stack (image)), NULL);
current_size -= undo_size + redo_size;
new_size -= undo_size + redo_size;
GIMP_LOG (IMAGE_SCALE,
"old_size = %"G_GINT64_FORMAT" new_size = %"G_GINT64_FORMAT,
current_size, new_size);
*new_memsize = new_size;
if (new_size > current_size && new_size > max_memsize)
return GIMP_IMAGE_SCALE_TOO_BIG;
all_layers = gimp_image_get_layer_list (image);
for (list = all_layers; list; list = g_list_next (list))
{
GimpItem *item = list->data;
/* group layers are updated automatically */
if (gimp_viewable_get_children (GIMP_VIEWABLE (item)))
continue;
if (! gimp_item_check_scaling (item, new_width, new_height))
{
g_list_free (all_layers);
return GIMP_IMAGE_SCALE_TOO_SMALL;
}
}
g_list_free (all_layers);
return GIMP_IMAGE_SCALE_OK;
}
|
