2.5 paint:
[blender.git] / source / blender / blenkernel / intern / paint.c
1 /*
2  * ***** BEGIN GPL LICENSE BLOCK *****
3  *
4  * This program is free software; you can redistribute it and/or
5  * modify it under the terms of the GNU General Public License
6  * as published by the Free Software Foundation; either version 2
7  * of the License, or (at your option) any later version.
8  *
9  * This program is distributed in the hope that it will be useful,
10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
12  * GNU General Public License for more details.
13  *
14  * You should have received a copy of the GNU General Public License
15  * along with this program; if not, write to the Free Software  Foundation,
16  * Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
17  *
18  * The Original Code is Copyright (C) 2009 by Nicholas Bishop
19  * All rights reserved.
20  *
21  * The Original Code is: all of this file.
22  *
23  * Contributor(s): none yet.
24  *
25  * ***** END GPL LICENSE BLOCK *****
26  */ 
27
28 #include "MEM_guardedalloc.h"
29
30 #include "DNA_brush_types.h"
31 #include "DNA_object_types.h"
32 #include "DNA_scene_types.h"
33
34 #include "BKE_brush.h"
35 #include "BKE_global.h"
36 #include "BKE_library.h"
37 #include "BKE_paint.h"
38
39 #include <stdlib.h>
40 #include <string.h>
41
42 Paint *paint_get_active(Scene *sce)
43 {
44         if(sce && sce->basact && sce->basact->object) {
45                 ToolSettings *ts = sce->toolsettings;
46
47                 switch(sce->basact->object->mode) {
48                 case OB_MODE_SCULPT:
49                         return &ts->sculpt->paint;
50                 case OB_MODE_VERTEX_PAINT:
51                         return &ts->vpaint->paint;
52                 case OB_MODE_WEIGHT_PAINT:
53                         return &ts->wpaint->paint;
54                 case OB_MODE_TEXTURE_PAINT:
55                         return &ts->imapaint.paint;
56                 }
57         }
58
59         return NULL;
60 }
61
62 Brush *paint_brush(Paint *p)
63 {
64         return p && p->brushes ? p->brushes[p->active_brush_index] : NULL;
65 }
66
67 void paint_brush_set(Paint *p, Brush *br)
68 {
69         if(p && !br) {
70                 /* Setting to NULL removes the current slot */
71                 paint_brush_slot_remove(p);
72         }
73         else if(p) {
74                 int found = 0;
75         
76                 if(p->brushes) {
77                         int i;
78                         
79                         /* See if there's already a slot with the brush */
80                         for(i = 0; i < p->brush_count; ++i) {
81                                 if(p->brushes[i] == br) {
82                                         p->active_brush_index = i;
83                                         found = 1;
84                                         break;
85                                 }
86                         }
87                         
88                 }
89                 
90                 if(!found)
91                         paint_brush_slot_add(p);
92                 
93                 /* Make sure the current slot is the new brush */
94                 p->brushes[p->active_brush_index] = br;
95         }
96 }
97
98 static void paint_brush_slots_alloc(Paint *p, const int count)
99 {
100         p->brush_count = count;
101         if(count == 0)
102                 p->brushes = NULL;
103         else
104                 p->brushes = MEM_callocN(sizeof(Brush*) * count, "Brush slots");
105 }
106
107 void paint_brush_slot_add(Paint *p)
108 {
109         if(p) {
110                 Brush **orig = p->brushes;
111                 int orig_count = p->brushes ? p->brush_count : 0;
112
113                 /* Increase size of brush slot array */
114                 paint_brush_slots_alloc(p, orig_count + 1);
115                 if(orig) {
116                         memcpy(p->brushes, orig, sizeof(Brush*) * orig_count);
117                         MEM_freeN(orig);
118                 }
119
120                 p->active_brush_index = orig_count;
121         }
122 }
123
124 void paint_brush_slot_remove(Paint *p)
125 {
126         if(p && p->brushes) {
127                 Brush **orig = p->brushes;
128                 int src, dst;
129                 
130                 /* Decrease size of brush slot array */
131                 paint_brush_slots_alloc(p, p->brush_count - 1);
132                 if(p->brushes) {
133                         for(src = 0, dst = 0; dst < p->brush_count; ++src) {
134                                 if(src != p->active_brush_index) {
135                                         p->brushes[dst] = orig[src];
136                                         ++dst;
137                                 }
138                         }
139                 }
140                 MEM_freeN(orig);
141
142                 if(p->active_brush_index >= p->brush_count)
143                         p->active_brush_index = p->brush_count - 1;
144                 if(p->active_brush_index < 0)
145                         p->active_brush_index = 0;
146         }
147 }
148
149 int paint_facesel_test(Object *ob)
150 {
151         return (G.f&G_FACESELECT) && (ob && (ob->mode & (OB_MODE_VERTEX_PAINT|OB_MODE_WEIGHT_PAINT|OB_MODE_TEXTURE_PAINT)));
152
153 }
154
155 void paint_init(Paint *p, const char *name)
156 {
157         Brush *brush;
158
159         /* If there's no brush, create one */
160         brush = paint_brush(p);
161         brush_check_exists(&brush, name);
162         paint_brush_set(p, brush);
163 }
164
165 void free_paint(Paint *paint)
166 {
167         if(paint->brushes)
168                 MEM_freeN(paint->brushes);
169 }
170
171 void copy_paint(Paint *orig, Paint *new)
172 {
173         if(orig->brushes) {
174                 int i;
175                 new->brushes = MEM_dupallocN(orig->brushes);
176                 for(i = 0; i < orig->brush_count; ++i)
177                         id_us_plus((ID *)new->brushes[i]);
178         }
179 }