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
|
/*
* ***** BEGIN GPL LICENSE BLOCK *****
*
* 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* The Original Code is Copyright (C) 2016 by Mike Erwin.
* All rights reserved.
*
* Contributor(s): Blender Foundation
*
* ***** END GPL LICENSE BLOCK *****
*/
/** \file blender/gpu/intern/gpu_attr_binding.c
* \ingroup gpu
*
* GPU vertex attribute binding
*/
#include "GPU_attr_binding.h"
#include "gpu_attr_binding_private.h"
#include <stddef.h>
#include <stdlib.h>
#if GPU_VERT_ATTR_MAX_LEN != 16
# error "attrib binding code assumes GPU_VERT_ATTR_MAX_LEN = 16"
#endif
void AttribBinding_clear(GPUAttrBinding *binding)
{
binding->loc_bits = 0;
binding->enabled_bits = 0;
}
uint read_attrib_location(const GPUAttrBinding *binding, uint a_idx)
{
#if TRUST_NO_ONE
assert(a_idx < GPU_VERT_ATTR_MAX_LEN);
assert(binding->enabled_bits & (1 << a_idx));
#endif
return (binding->loc_bits >> (4 * a_idx)) & 0xF;
}
static void write_attrib_location(GPUAttrBinding *binding, uint a_idx, uint location)
{
#if TRUST_NO_ONE
assert(a_idx < GPU_VERT_ATTR_MAX_LEN);
assert(location < GPU_VERT_ATTR_MAX_LEN);
#endif
const uint shift = 4 * a_idx;
const uint64_t mask = ((uint64_t)0xF) << shift;
/* overwrite this attrib's previous location */
binding->loc_bits = (binding->loc_bits & ~mask) | (location << shift);
/* mark this attrib as enabled */
binding->enabled_bits |= 1 << a_idx;
}
void get_attrib_locations(const GPUVertFormat *format, GPUAttrBinding *binding, const GPUShaderInterface *shaderface)
{
AttribBinding_clear(binding);
for (uint a_idx = 0; a_idx < format->attr_len; ++a_idx) {
const GPUVertAttr *a = format->attribs + a_idx;
for (uint n_idx = 0; n_idx < a->name_len; ++n_idx) {
const GPUShaderInput *input = GPU_shaderinterface_attr(shaderface, a->name[n_idx]);
#if TRUST_NO_ONE
assert(input != NULL);
/* TODO: make this a recoverable runtime error? indicates mismatch between vertex format and program */
#endif
write_attrib_location(binding, a_idx, input->location);
}
}
}
|
