1 /*
2 * This program is free software; you can redistribute it and/or
3 * modify it under the terms of the GNU General Public License
4 * as published by the Free Software Foundation; either version 2
5 * of the License, or (at your option) any later version.
6 *
7 * This program is distributed in the hope that it will be useful,
8 * but WITHOUT ANY WARRANTY; without even the implied warranty of
9 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
10 * GNU General Public License for more details.
11 *
12 * You should have received a copy of the GNU General Public License
13 * along with this program; if not, write to the Free Software Foundation,
14 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
15 */
16
17 /** \file
18 * \ingroup draw_engine
19 */
20
21 #include "DNA_volume_types.h"
22
23 #include "DRW_render.h"
24 #include "GPU_shader.h"
25
26 #include "overlay_private.h"
27
OVERLAY_volume_cache_init(OVERLAY_Data * vedata)28 void OVERLAY_volume_cache_init(OVERLAY_Data *vedata)
29 {
30 OVERLAY_PassList *psl = vedata->psl;
31 OVERLAY_PrivateData *pd = vedata->stl->pd;
32 const bool is_select = DRW_state_is_select();
33
34 if (is_select) {
35 DRWState state = DRW_STATE_WRITE_DEPTH | DRW_STATE_DEPTH_LESS_EQUAL;
36 DRW_PASS_CREATE(psl->volume_ps, state | pd->clipping_state);
37 GPUShader *sh = OVERLAY_shader_depth_only();
38 DRWShadingGroup *grp = DRW_shgroup_create(sh, psl->volume_ps);
39 pd->volume_selection_surface_grp = grp;
40 DRW_shgroup_uniform_block(grp, "globalsBlock", G_draw.block_ubo);
41 }
42 else {
43 psl->volume_ps = NULL;
44 pd->volume_selection_surface_grp = NULL;
45 }
46 }
47
OVERLAY_volume_cache_populate(OVERLAY_Data * vedata,Object * ob)48 void OVERLAY_volume_cache_populate(OVERLAY_Data *vedata, Object *ob)
49 {
50 OVERLAY_PrivateData *pd = vedata->stl->pd;
51 const bool is_select = DRW_state_is_select();
52
53 if (is_select) {
54 struct GPUBatch *geom = DRW_cache_volume_selection_surface_get(ob);
55 if (geom != NULL) {
56 DRW_shgroup_call(pd->volume_selection_surface_grp, geom, ob);
57 }
58 }
59 }
60
OVERLAY_volume_draw(OVERLAY_Data * vedata)61 void OVERLAY_volume_draw(OVERLAY_Data *vedata)
62 {
63 OVERLAY_PassList *psl = vedata->psl;
64
65 if (psl->volume_ps) {
66 DRW_draw_pass(psl->volume_ps);
67 }
68 }
69