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
|
/**************************************************************************
*
* Copyright 2010 Christian König
* All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sub license, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice (including the
* next paragraph) shall be included in all copies or substantial portions
* of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
* IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
**************************************************************************/
#include <assert.h>
#include <pipe/p_context.h>
#include <pipe/p_screen.h>
#include <util/u_memory.h>
#include <util/u_inlines.h>
#include <util/u_format.h>
#include "vl_vertex_buffers.h"
#include "vl_types.h"
/* vertices for a quad covering a block */
static const struct quadf const_quad = {
{0.0f, 1.0f}, {0.0f, 0.0f}, {1.0f, 0.0f}, {1.0f, 1.0f}
};
struct pipe_vertex_buffer
vl_vb_upload_quads(struct pipe_context *pipe, unsigned max_blocks)
{
struct pipe_vertex_buffer quad;
struct pipe_transfer *buf_transfer;
struct quadf *v;
unsigned i;
assert(pipe);
assert(max_blocks);
/* create buffer */
quad.stride = sizeof(struct vertex2f);
quad.max_index = 4 * max_blocks - 1;
quad.buffer_offset = 0;
quad.buffer = pipe_buffer_create
(
pipe->screen,
PIPE_BIND_VERTEX_BUFFER,
sizeof(struct vertex2f) * 4 * max_blocks
);
if(!quad.buffer)
return quad;
/* and fill it */
v = pipe_buffer_map
(
pipe,
quad.buffer,
PIPE_TRANSFER_WRITE | PIPE_TRANSFER_DISCARD,
&buf_transfer
);
for ( i = 0; i < max_blocks; ++i)
memcpy(v + i, &const_quad, sizeof(const_quad));
pipe_buffer_unmap(pipe, quad.buffer, buf_transfer);
return quad;
}
struct pipe_vertex_element
vl_vb_get_quad_vertex_element()
{
struct pipe_vertex_element element;
/* setup rectangle element */
element.src_offset = 0;
element.instance_divisor = 0;
element.vertex_buffer_index = 0;
element.src_format = PIPE_FORMAT_R32G32_FLOAT;
return element;
}
struct pipe_vertex_buffer
vl_vb_create_buffer(struct pipe_context *pipe, unsigned max_blocks, unsigned stride)
{
struct pipe_vertex_buffer buf;
buf.stride = stride;
buf.max_index = 4 * max_blocks - 1;
buf.buffer_offset = 0;
buf.buffer = pipe_buffer_create
(
pipe->screen,
PIPE_BIND_VERTEX_BUFFER,
stride * 4 * max_blocks
);
return buf;
}
unsigned
vl_vb_element_helper(struct pipe_vertex_element* elements, unsigned num_elements,
unsigned vertex_buffer_index)
{
unsigned i, offset = 0;
assert(elements && num_elements);
for ( i = 0; i < num_elements; ++i ) {
elements[i].src_offset = offset;
elements[i].instance_divisor = 0;
elements[i].vertex_buffer_index = vertex_buffer_index;
offset += util_format_get_blocksize(elements[i].src_format);
}
return offset;
}
bool
vl_vb_init(struct vl_vertex_buffer *buffer, unsigned max_blocks, unsigned num_elements)
{
assert(buffer);
buffer->num_verts = 0;
buffer->num_elements = num_elements;
buffer->buffer = MALLOC(max_blocks * num_elements * sizeof(float) * 4);
return buffer->buffer != NULL;
}
unsigned
vl_vb_upload(struct vl_vertex_buffer *buffer, void *dst)
{
unsigned todo;
assert(buffer);
todo = buffer->num_verts;
buffer->num_verts = 0;
if(todo)
memcpy(dst, buffer->buffer, sizeof(float) * buffer->num_elements * todo);
return todo;
}
void
vl_vb_cleanup(struct vl_vertex_buffer *buffer)
{
assert(buffer);
FREE(buffer->buffer);
}
|
