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
|
/*
* 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 buffer
*/
#pragma once
#include "BLI_utildefines.h"
#include "GPU_vertex_format.h"
typedef enum {
/** Initial state. */
GPU_VERTBUF_INVALID = 0,
/** Was init with a vertex format. */
GPU_VERTBUF_INIT = (1 << 0),
/** Data has been touched and need to be re-uploaded. */
GPU_VERTBUF_DATA_DIRTY = (1 << 1),
/** The buffer has been created inside GPU memory. */
GPU_VERTBUF_DATA_UPLOADED = (1 << 2),
} GPUVertBufStatus;
ENUM_OPERATORS(GPUVertBufStatus, GPU_VERTBUF_DATA_UPLOADED)
#ifdef __cplusplus
extern "C" {
#endif
/**
* How to create a #GPUVertBuf:
* 1) verts = GPU_vertbuf_calloc()
* 2) GPU_vertformat_attr_add(verts->format, ...)
* 3) GPU_vertbuf_data_alloc(verts, vertex_len) <-- finalizes/packs vertex format
* 4) GPU_vertbuf_attr_fill(verts, pos, application_pos_buffer)
*/
typedef enum {
/* can be extended to support more types */
GPU_USAGE_STREAM,
GPU_USAGE_STATIC, /* do not keep data in memory */
GPU_USAGE_DYNAMIC,
GPU_USAGE_DEVICE_ONLY, /* Do not do host->device data transfers. */
} GPUUsageType;
/** Opaque type hiding blender::gpu::VertBuf. */
typedef struct GPUVertBuf GPUVertBuf;
GPUVertBuf *GPU_vertbuf_calloc(void);
GPUVertBuf *GPU_vertbuf_create_with_format_ex(const GPUVertFormat *, GPUUsageType);
#define GPU_vertbuf_create_with_format(format) \
GPU_vertbuf_create_with_format_ex(format, GPU_USAGE_STATIC)
/**
* (Download and) return a pointer containing the data of a vertex buffer.
*
* Note that the returned pointer is still owned by the driver. To get an
* local copy, use `GPU_vertbuf_unmap` after calling `GPU_vertbuf_read`.
*/
const void *GPU_vertbuf_read(GPUVertBuf *verts);
void *GPU_vertbuf_unmap(const GPUVertBuf *verts, const void *mapped_data);
void GPU_vertbuf_clear(GPUVertBuf *verts);
void GPU_vertbuf_discard(GPUVertBuf *);
/* Avoid GPUVertBuf datablock being free but not its data. */
void GPU_vertbuf_handle_ref_add(GPUVertBuf *verts);
void GPU_vertbuf_handle_ref_remove(GPUVertBuf *verts);
void GPU_vertbuf_init_with_format_ex(GPUVertBuf *, const GPUVertFormat *, GPUUsageType);
#define GPU_vertbuf_init_with_format(verts, format) \
GPU_vertbuf_init_with_format_ex(verts, format, GPU_USAGE_STATIC)
GPUVertBuf *GPU_vertbuf_duplicate(GPUVertBuf *verts);
void GPU_vertbuf_data_alloc(GPUVertBuf *, uint v_len);
void GPU_vertbuf_data_resize(GPUVertBuf *, uint v_len);
void GPU_vertbuf_data_len_set(GPUVertBuf *, uint v_len);
/* The most important #set_attr variant is the untyped one. Get it right first.
* It takes a void* so the app developer is responsible for matching their app data types
* to the vertex attribute's type and component count. They're in control of both, so this
* should not be a problem. */
void GPU_vertbuf_attr_set(GPUVertBuf *, uint a_idx, uint v_idx, const void *data);
void GPU_vertbuf_vert_set(GPUVertBuf *verts, uint v_idx, const void *data);
/* Tightly packed, non interleaved input data. */
void GPU_vertbuf_attr_fill(GPUVertBuf *, uint a_idx, const void *data);
void GPU_vertbuf_attr_fill_stride(GPUVertBuf *, uint a_idx, uint stride, const void *data);
/* For low level access only */
typedef struct GPUVertBufRaw {
uint size;
uint stride;
unsigned char *data;
unsigned char *data_init;
#ifdef DEBUG
/* Only for overflow check */
unsigned char *_data_end;
#endif
} GPUVertBufRaw;
GPU_INLINE void *GPU_vertbuf_raw_step(GPUVertBufRaw *a)
{
unsigned char *data = a->data;
a->data += a->stride;
BLI_assert(data < a->_data_end);
return (void *)data;
}
GPU_INLINE uint GPU_vertbuf_raw_used(GPUVertBufRaw *a)
{
return ((a->data - a->data_init) / a->stride);
}
void GPU_vertbuf_attr_get_raw_data(GPUVertBuf *, uint a_idx, GPUVertBufRaw *access);
void *GPU_vertbuf_steal_data(GPUVertBuf *verts);
void *GPU_vertbuf_get_data(const GPUVertBuf *verts);
const GPUVertFormat *GPU_vertbuf_get_format(const GPUVertBuf *verts);
uint GPU_vertbuf_get_vertex_alloc(const GPUVertBuf *verts);
uint GPU_vertbuf_get_vertex_len(const GPUVertBuf *verts);
GPUVertBufStatus GPU_vertbuf_get_status(const GPUVertBuf *verts);
void GPU_vertbuf_use(GPUVertBuf *);
void GPU_vertbuf_bind_as_ssbo(struct GPUVertBuf *verts, int binding);
/* XXX do not use. */
void GPU_vertbuf_update_sub(GPUVertBuf *verts, uint start, uint len, void *data);
/* Metrics */
uint GPU_vertbuf_get_memory_usage(void);
/* Macros */
#define GPU_VERTBUF_DISCARD_SAFE(verts) \
do { \
if (verts != NULL) { \
GPU_vertbuf_discard(verts); \
verts = NULL; \
} \
} while (0)
#ifdef __cplusplus
}
#endif
|
