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
|
/*
* 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.
*/
/** \file
* \ingroup gpu
*
* GPU vertex format
*/
#ifndef __GPU_VERTEX_FORMAT_H__
#define __GPU_VERTEX_FORMAT_H__
#include "GPU_common.h"
#include "BLI_compiler_compat.h"
#include "BLI_assert.h"
#define GPU_VERT_ATTR_MAX_LEN 16
#define GPU_VERT_ATTR_MAX_NAMES 5
#define GPU_VERT_ATTR_NAME_AVERAGE_LEN 11
#define GPU_VERT_ATTR_NAMES_BUF_LEN ((GPU_VERT_ATTR_NAME_AVERAGE_LEN + 1) * GPU_VERT_ATTR_MAX_LEN)
typedef enum {
GPU_COMP_I8,
GPU_COMP_U8,
GPU_COMP_I16,
GPU_COMP_U16,
GPU_COMP_I32,
GPU_COMP_U32,
GPU_COMP_F32,
GPU_COMP_I10,
} GPUVertCompType;
typedef enum {
GPU_FETCH_FLOAT,
GPU_FETCH_INT,
GPU_FETCH_INT_TO_FLOAT_UNIT, /* 127 (ubyte) -> 0.5 (and so on for other int types) */
GPU_FETCH_INT_TO_FLOAT, /* 127 (any int type) -> 127.0 */
} GPUVertFetchMode;
typedef struct GPUVertAttr {
uint fetch_mode : 2;
uint comp_type : 3;
/* 1 to 4 or 8 or 12 or 16 */
uint comp_len : 5;
/* size in bytes, 1 to 64 */
uint sz : 7;
/* from beginning of vertex, in bytes */
uint offset : 11;
/* up to GPU_VERT_ATTR_MAX_NAMES */
uint name_len : 3;
uint gl_comp_type;
/* -- 8 Bytes -- */
uchar names[GPU_VERT_ATTR_MAX_NAMES];
} GPUVertAttr;
BLI_STATIC_ASSERT(GPU_VERT_ATTR_NAMES_BUF_LEN <= 256,
"We use uchar as index inside the name buffer "
"so GPU_VERT_ATTR_NAMES_BUF_LEN needs to be be "
"smaller than GPUVertFormat->name_offset and "
"GPUVertAttr->names maximum value");
typedef struct GPUVertFormat {
/** 0 to 16 (GPU_VERT_ATTR_MAX_LEN). */
uint attr_len : 5;
/** Total count of active vertex attribute. */
uint name_len : 5;
/** Stride in bytes, 1 to 1024. */
uint stride : 11;
/** Has the format been packed. */
uint packed : 1;
/** Current offset in names[]. */
uint name_offset : 8;
GPUVertAttr attrs[GPU_VERT_ATTR_MAX_LEN];
char names[GPU_VERT_ATTR_NAMES_BUF_LEN];
} GPUVertFormat;
struct GPUShaderInterface;
void GPU_vertformat_clear(GPUVertFormat *);
void GPU_vertformat_copy(GPUVertFormat *dest, const GPUVertFormat *src);
void GPU_vertformat_from_interface(GPUVertFormat *format,
const struct GPUShaderInterface *shaderface);
uint GPU_vertformat_attr_add(
GPUVertFormat *, const char *name, GPUVertCompType, uint comp_len, GPUVertFetchMode);
void GPU_vertformat_alias_add(GPUVertFormat *, const char *alias);
int GPU_vertformat_attr_id_get(const GPUVertFormat *, const char *name);
BLI_INLINE const char *GPU_vertformat_attr_name_get(const GPUVertFormat *format,
const GPUVertAttr *attr,
uint n_idx)
{
return format->names + attr->names[n_idx];
}
/* format conversion */
typedef struct GPUPackedNormal {
int x : 10;
int y : 10;
int z : 10;
int w : 2; /* 0 by default, can manually set to { -2, -1, 0, 1 } */
} GPUPackedNormal;
GPUPackedNormal GPU_normal_convert_i10_v3(const float data[3]);
GPUPackedNormal GPU_normal_convert_i10_s3(const short data[3]);
#endif /* __GPU_VERTEX_FORMAT_H__ */
|
