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
|
/**************************************************************************
*
* Copyright 2008 Tungsten Graphics, Inc., Cedar Park, Texas.
* 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 "pipe/p_context.h"
#include "pipe/p_defines.h"
#include "util/u_inlines.h"
#include "util/u_draw_quad.h"
#include "util/u_memory.h"
#include "cso_cache/cso_context.h"
/**
* Draw a simple vertex buffer / primitive.
* Limited to float[4] vertex attribs, tightly packed.
*/
void
util_draw_vertex_buffer(struct pipe_context *pipe,
struct cso_context *cso,
struct pipe_resource *vbuf,
uint offset,
uint prim_type,
uint num_verts,
uint num_attribs)
{
struct pipe_vertex_buffer vbuffer;
assert(num_attribs <= PIPE_MAX_ATTRIBS);
/* tell pipe about the vertex buffer */
memset(&vbuffer, 0, sizeof(vbuffer));
vbuffer.buffer = vbuf;
vbuffer.stride = num_attribs * 4 * sizeof(float); /* vertex size */
vbuffer.buffer_offset = offset;
/* note: vertex elements already set by caller */
if (cso) {
cso_set_vertex_buffers(cso, 1, &vbuffer);
cso_draw_arrays(cso, prim_type, 0, num_verts);
} else {
pipe->set_vertex_buffers(pipe, 1, &vbuffer);
util_draw_arrays(pipe, prim_type, 0, num_verts);
}
}
/**
* Draw a simple vertex buffer / primitive.
* Limited to float[4] vertex attribs, tightly packed.
*/
void
util_draw_user_vertex_buffer(struct cso_context *cso, void *buffer,
uint prim_type, uint num_verts, uint num_attribs)
{
struct pipe_vertex_buffer vbuffer = {0};
assert(num_attribs <= PIPE_MAX_ATTRIBS);
vbuffer.user_buffer = buffer;
vbuffer.stride = num_attribs * 4 * sizeof(float); /* vertex size */
/* note: vertex elements already set by caller */
cso_set_vertex_buffers(cso, 1, &vbuffer);
cso_draw_arrays(cso, prim_type, 0, num_verts);
}
/**
* Draw screen-aligned textured quad.
* Note: this isn't especially efficient.
*/
void
util_draw_texquad(struct pipe_context *pipe, struct cso_context *cso,
float x0, float y0, float x1, float y1, float z)
{
uint numAttribs = 2, i, j;
uint vertexBytes = 4 * (4 * numAttribs * sizeof(float));
struct pipe_resource *vbuf = NULL;
float *v = NULL;
v = MALLOC(vertexBytes);
if (v == NULL)
goto out;
/*
* Load vertex buffer
*/
for (i = j = 0; i < 4; i++) {
v[j + 2] = z; /* z */
v[j + 3] = 1.0; /* w */
v[j + 6] = 0.0; /* r */
v[j + 7] = 1.0; /* q */
j += 8;
}
v[0] = x0;
v[1] = y0;
v[4] = 0.0; /*s*/
v[5] = 0.0; /*t*/
v[8] = x1;
v[9] = y0;
v[12] = 1.0;
v[13] = 0.0;
v[16] = x1;
v[17] = y1;
v[20] = 1.0;
v[21] = 1.0;
v[24] = x0;
v[25] = y1;
v[28] = 0.0;
v[29] = 1.0;
vbuf = pipe_buffer_create(pipe->screen, PIPE_BIND_VERTEX_BUFFER,
PIPE_USAGE_STAGING, vertexBytes);
if (!vbuf)
goto out;
pipe_buffer_write(pipe, vbuf, 0, vertexBytes, v);
util_draw_vertex_buffer(pipe, cso, vbuf, 0, PIPE_PRIM_TRIANGLE_FAN, 4, 2);
out:
if (vbuf)
pipe_resource_reference(&vbuf, NULL);
if (v)
FREE(v);
}
|
