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
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
|
/* Test the TGSI_SEMANTIC_POSITION fragment shader input.
* Plus properties for upper-left vs. lower-left origin and
* center integer vs. half-integer;
*/
#include <stdio.h>
#include "graw_util.h"
static int width = 300;
static int height = 300;
static struct graw_info info;
struct vertex {
float position[4];
float color[4];
};
/* Note: the upper-left vertex is pushed to the left a bit to
* make sure we can spot upside-down rendering.
*/
static struct vertex vertices[] =
{
{
{-0.95, -0.95, 0.5, 1.0 },
{ 0, 0, 0, 1 }
},
{
{ 0.85, -0.95, 0.5, 1.0 },
{ 0, 0, 0, 1 }
},
{
{ 0.95, 0.95, 0.5, 1.0 },
{ 0, 0, 0, 1 }
},
{
{-0.95, 0.95, 0.5, 1.0 },
{ 0, 0, 0, 1 }
}
};
#define NUM_VERTS (sizeof(vertices) / sizeof(vertices[0]))
static void
set_vertices(void)
{
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);
memset(&vbuf, 0, sizeof vbuf);
vbuf.stride = sizeof(struct vertex);
vbuf.buffer_offset = 0;
vbuf.buffer.resource = pipe_buffer_create_with_data(info.ctx,
PIPE_BIND_VERTEX_BUFFER,
PIPE_USAGE_DEFAULT,
sizeof(vertices),
vertices);
info.ctx->set_vertex_buffers(info.ctx, 0, 1, &vbuf);
}
static void
set_vertex_shader(void)
{
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);
info.ctx->bind_vs_state(info.ctx, handle);
}
static void
set_fragment_shader(int mode)
{
void *handle;
const char *origin_upper_left_text =
"FRAG\n"
"PROPERTY FS_COORD_ORIGIN UPPER_LEFT\n" /* upper-left = black corner */
"DCL IN[0], POSITION, LINEAR\n"
"DCL OUT[0], COLOR\n"
"DCL TEMP[0]\n"
"IMM FLT32 { 0.003333, 0.003333, 1.0, 1.0 }\n"
"IMM FLT32 { 0.0, 300.0, 0.0, 0.0 }\n"
" 0: MOV TEMP[0], IN[0] \n"
" 1: MOV TEMP[0].zw, IMM[1].xxxx \n"
" 2: MUL OUT[0], TEMP[0], IMM[0] \n"
" 3: END\n";
const char *origin_lower_left_text =
"FRAG\n"
"PROPERTY FS_COORD_ORIGIN LOWER_LEFT\n" /* lower-left = black corner */
"DCL IN[0], POSITION, LINEAR\n"
"DCL OUT[0], COLOR\n"
"DCL TEMP[0]\n"
"IMM FLT32 { 0.003333, 0.003333, 1.0, 1.0 }\n"
"IMM FLT32 { 0.0, 300.0, 0.0, 0.0 }\n"
" 0: MOV TEMP[0], IN[0] \n"
" 1: MOV TEMP[0].zw, IMM[1].xxxx \n"
" 2: MUL OUT[0], TEMP[0], IMM[0] \n"
" 3: END\n";
/* Test fragcoord center integer vs. half integer */
const char *center_integer_text =
"FRAG\n"
"PROPERTY FS_COORD_PIXEL_CENTER INTEGER \n" /* pixels are black */
"DCL IN[0], POSITION, LINEAR \n"
"DCL OUT[0], COLOR \n"
"DCL TEMP[0] \n"
"IMM FLT32 { 0.003333, 0.003333, 1.0, 1.0 } \n"
"IMM FLT32 { 0.0, 300.0, 0.0, 0.0 } \n"
"0: FRC TEMP[0], IN[0] \n"
"1: MOV TEMP[0].zw, IMM[1].xxxx \n"
"2: MOV OUT[0], TEMP[0] \n"
"3: END \n";
const char *center_half_integer_text =
"FRAG\n"
"PROPERTY FS_COORD_PIXEL_CENTER HALF_INTEGER \n" /* pixels are olive colored */
"DCL IN[0], POSITION, LINEAR \n"
"DCL OUT[0], COLOR \n"
"DCL TEMP[0] \n"
"IMM FLT32 { 0.003333, 0.003333, 1.0, 1.0 } \n"
"IMM FLT32 { 0.0, 300.0, 0.0, 0.0 } \n"
"0: FRC TEMP[0], IN[0] \n"
"1: MOV TEMP[0].zw, IMM[1].xxxx \n"
"2: MOV OUT[0], TEMP[0] \n"
"3: END \n";
const char *text;
if (mode == 0)
text = origin_upper_left_text;
else if (mode == 1)
text = origin_lower_left_text;
else if (mode == 2)
text = center_integer_text;
else
text = center_half_integer_text;
handle = graw_parse_fragment_shader(info.ctx, text);
info.ctx->bind_fs_state(info.ctx, handle);
}
static void
draw(void)
{
union pipe_color_union clear_color;
clear_color.f[0] = 0.25;
clear_color.f[1] = 0.25;
clear_color.f[2] = 0.25;
clear_color.f[3] = 1.0;
info.ctx->clear(info.ctx,
PIPE_CLEAR_COLOR | PIPE_CLEAR_DEPTHSTENCIL,
&clear_color, 1.0, 0);
util_draw_arrays(info.ctx, PIPE_PRIM_QUADS, 0, NUM_VERTS);
info.ctx->flush(info.ctx, NULL, 0);
#if 0
/* At the moment, libgraw leaks out/makes available some of the
* symbols from gallium/auxiliary, including these debug helpers.
* Will eventually want to bless some of these paths, and lock the
* others down so they aren't accessible from test programs.
*
* This currently just happens to work on debug builds - a release
* build will probably fail to link here:
*/
debug_dump_surface_bmp(info.ctx, "result.bmp", surf);
#endif
graw_util_flush_front(&info);
}
#if 0
static void
resize(int w, int h)
{
width = w;
height = h;
set_viewport(0, 0, width, height, 30, 1000);
}
#endif
static void
init(int mode)
{
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_vertices();
set_vertex_shader();
set_fragment_shader(mode);
}
int
main(int argc, char *argv[])
{
int mode = argc > 1 ? atoi(argv[1]) : 0;
switch (mode) {
default:
case 0:
printf("frag coord origin upper-left (lower-left = black)\n");
break;
case 1:
printf("frag coord origin lower-left (upper-left = black)\n");
break;
case 2:
printf("frag coord center integer (all pixels black)\n");
break;
case 3:
printf("frag coord center half-integer (all pixels olive color)\n");
break;
}
init(mode);
graw_set_display_func(draw);
/*graw_set_reshape_func(resize);*/
graw_main_loop();
return 0;
}
|
