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
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
|
/* Test gallium occlusion queries.
*/
#include <stdio.h>
#include "graw_util.h"
static int width = 300;
static int height = 300;
/* expected results of occlusion test (depndsd on window size) */
static int expected1 = (int) ((300 * 0.9) * (300 * 0.9));
static int expected2 = 420;
static struct graw_info info;
struct vertex {
float position[4];
float color[4];
};
#define z0 0.2
#define z1 0.6
static struct vertex obj1_vertices[4] =
{
{
{-0.9, -0.9, z0, 1.0 },
{ 1, 0, 0, 1 }
},
{
{ 0.9, -0.9, z0, 1.0 },
{ 1, 0, 0, 1 }
},
{
{ 0.9, 0.9, z0, 1.0 },
{ 1, 0, 0, 1 }
},
{
{-0.9, 0.9, z0, 1.0 },
{ 1, 0, 0, 1 }
}
};
static struct vertex obj2_vertices[4] =
{
{
{ -0.2, -0.2, z1, 1.0 },
{ 0, 0, 1, 1 }
},
{
{ 0.95, -0.2, z1, 1.0 },
{ 0, 0, 1, 1 }
},
{
{ 0.95, 0.2, z1, 1.0 },
{ 0, 0, 1, 1 }
},
{
{ -0.2, 0.2, z1, 1.0 },
{ 0, 0, 1, 1 }
},
};
#define NUM_VERTS 4
static void
set_vertices(struct vertex *vertices, unsigned bytes)
{
struct pipe_vertex_element ve[2];
struct pipe_vertex_buffer vbuf;
void *handle;
memset(ve, 0, sizeof ve);
ve[0].src_offset = Offset(struct vertex, position);
ve[0].src_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
ve[1].src_offset = Offset(struct vertex, color);
ve[1].src_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
handle = info.ctx->create_vertex_elements_state(info.ctx, 2, ve);
info.ctx->bind_vertex_elements_state(info.ctx, handle);
vbuf.stride = sizeof(struct vertex);
vbuf.buffer_offset = 0;
vbuf.buffer = pipe_buffer_create_with_data(info.ctx,
PIPE_BIND_VERTEX_BUFFER,
PIPE_USAGE_DEFAULT,
bytes,
vertices);
info.ctx->set_vertex_buffers(info.ctx, 0, 1, &vbuf);
}
static void
set_vertex_shader(struct graw_info *info)
{
void *handle;
const char *text =
"VERT\n"
"DCL IN[0]\n"
"DCL IN[1]\n"
"DCL OUT[0], POSITION\n"
"DCL OUT[1], GENERIC[0]\n"
" 0: MOV OUT[0], IN[0]\n"
" 1: MOV OUT[1], IN[1]\n"
" 2: END\n";
handle = graw_parse_vertex_shader(info->ctx, text);
if (!handle) {
debug_printf("Failed to parse vertex shader\n");
return;
}
info->ctx->bind_vs_state(info->ctx, handle);
}
static void
set_fragment_shader(struct graw_info *info)
{
void *handle;
const char *text =
"FRAG\n"
"DCL IN[0], GENERIC, LINEAR\n"
"DCL OUT[0], COLOR\n"
" 0: MOV OUT[0], IN[0]\n"
" 1: END\n";
handle = graw_parse_fragment_shader(info->ctx, text);
if (!handle) {
debug_printf("Failed to parse fragment shader\n");
return;
}
info->ctx->bind_fs_state(info->ctx, handle);
}
static void
draw(void)
{
int expected1_min = (int) (expected1 * 0.95);
int expected1_max = (int) (expected1 * 1.05);
int expected2_min = (int) (expected2 * 0.95);
int expected2_max = (int) (expected2 * 1.05);
union pipe_color_union clear_color;
struct pipe_query *q1, *q2;
union pipe_query_result res1, res2;
clear_color.f[0] = 0.25;
clear_color.f[1] = 0.25;
clear_color.f[2] = 0.25;
clear_color.f[3] = 1.00;
info.ctx->clear(info.ctx,
PIPE_CLEAR_COLOR | PIPE_CLEAR_DEPTHSTENCIL,
&clear_color, 1.0, 0);
q1 = info.ctx->create_query(info.ctx, PIPE_QUERY_OCCLUSION_COUNTER, 0);
q2 = info.ctx->create_query(info.ctx, PIPE_QUERY_OCCLUSION_COUNTER, 0);
/* draw first, large object */
set_vertices(obj1_vertices, sizeof(obj1_vertices));
info.ctx->begin_query(info.ctx, q1);
util_draw_arrays(info.ctx, PIPE_PRIM_QUADS, 0, NUM_VERTS);
info.ctx->end_query(info.ctx, q1);
/* draw second, small object behind first object */
set_vertices(obj2_vertices, sizeof(obj2_vertices));
info.ctx->begin_query(info.ctx, q2);
util_draw_arrays(info.ctx, PIPE_PRIM_QUADS, 0, NUM_VERTS);
info.ctx->end_query(info.ctx, q2);
info.ctx->get_query_result(info.ctx, q1, TRUE, &res1);
info.ctx->get_query_result(info.ctx, q2, TRUE, &res2);
printf("result1 = %lu result2 = %lu\n", res1.u64, res2.u64);
if (res1.u64 < expected1_min || res1.u64 > expected1_max)
printf(" Failure: result1 should be near %d\n", expected1);
if (res2.u64 < expected2_min || res2.u64 > expected2_max)
printf(" Failure: result2 should be near %d\n", expected2);
info.ctx->flush(info.ctx, NULL, 0);
graw_util_flush_front(&info);
info.ctx->destroy_query(info.ctx, q1);
info.ctx->destroy_query(info.ctx, q2);
}
#if 0
static void
resize(int w, int h)
{
width = w;
height = h;
graw_util_viewport(&info, 0, 0, width, height, 30, 1000);
}
#endif
static void
init(void)
{
if (!graw_util_create_window(&info, width, height, 1, TRUE))
exit(1);
graw_util_default_state(&info, TRUE);
graw_util_viewport(&info, 0, 0, width, height, -1.0, 1.0);
set_vertex_shader(&info);
set_fragment_shader(&info);
}
int
main(int argc, char *argv[])
{
init();
printf("The red quad should mostly occlude the blue quad.\n");
graw_set_display_func(draw);
/*graw_set_reshape_func(resize);*/
graw_main_loop();
return 0;
}
|
