1 /* Test the TGSI_SEMANTIC_POSITION fragment shader input.
2 * Plus properties for upper-left vs. lower-left origin and
3 * center integer vs. half-integer;
4 */
5
6 #include <stdio.h>
7
8 #include "graw_util.h"
9
10
11 static int width = 300;
12 static int height = 300;
13
14 static struct graw_info info;
15
16 struct vertex {
17 float position[4];
18 float color[4];
19 };
20
21 /* Note: the upper-left vertex is pushed to the left a bit to
22 * make sure we can spot upside-down rendering.
23 */
24 static struct vertex vertices[] =
25 {
26 {
27 {-0.95, -0.95, 0.5, 1.0 },
28 { 0, 0, 0, 1 }
29 },
30
31 {
32 { 0.85, -0.95, 0.5, 1.0 },
33 { 0, 0, 0, 1 }
34 },
35
36 {
37 { 0.95, 0.95, 0.5, 1.0 },
38 { 0, 0, 0, 1 }
39 },
40
41 {
42 {-0.95, 0.95, 0.5, 1.0 },
43 { 0, 0, 0, 1 }
44 }
45 };
46
47 #define NUM_VERTS (sizeof(vertices) / sizeof(vertices[0]))
48
49
50 static void
set_vertices(void)51 set_vertices(void)
52 {
53 struct pipe_vertex_element ve[2];
54 struct pipe_vertex_buffer vbuf;
55 void *handle;
56
57 memset(ve, 0, sizeof ve);
58
59 ve[0].src_offset = Offset(struct vertex, position);
60 ve[0].src_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
61 ve[1].src_offset = Offset(struct vertex, color);
62 ve[1].src_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
63
64 handle = info.ctx->create_vertex_elements_state(info.ctx, 2, ve);
65 info.ctx->bind_vertex_elements_state(info.ctx, handle);
66
67
68 vbuf.stride = sizeof(struct vertex);
69 vbuf.buffer_offset = 0;
70 vbuf.buffer = pipe_buffer_create_with_data(info.ctx,
71 PIPE_BIND_VERTEX_BUFFER,
72 PIPE_USAGE_STATIC,
73 sizeof(vertices),
74 vertices);
75
76 info.ctx->set_vertex_buffers(info.ctx, 1, &vbuf);
77 }
78
79
80 static void
set_vertex_shader(void)81 set_vertex_shader(void)
82 {
83 void *handle;
84 const char *text =
85 "VERT\n"
86 "DCL IN[0]\n"
87 "DCL IN[1]\n"
88 "DCL OUT[0], POSITION\n"
89 "DCL OUT[1], GENERIC[0]\n"
90 " 0: MOV OUT[0], IN[0]\n"
91 " 1: MOV OUT[1], IN[1]\n"
92 " 2: END\n";
93
94 handle = graw_parse_vertex_shader(info.ctx, text);
95 info.ctx->bind_vs_state(info.ctx, handle);
96 }
97
98
99 static void
set_fragment_shader(int mode)100 set_fragment_shader(int mode)
101 {
102 void *handle;
103
104 const char *origin_upper_left_text =
105 "FRAG\n"
106 "PROPERTY FS_COORD_ORIGIN UPPER_LEFT\n" /* upper-left = black corner */
107 "DCL IN[0], POSITION, LINEAR\n"
108 "DCL OUT[0], COLOR\n"
109 "DCL TEMP[0]\n"
110 "IMM FLT32 { 0.003333, 0.003333, 1.0, 1.0 }\n"
111 "IMM FLT32 { 0.0, 300.0, 0.0, 0.0 }\n"
112 " 0: MOV TEMP[0], IN[0] \n"
113 " 1: MOV TEMP[0].zw, IMM[1].xxxx \n"
114 " 2: MUL OUT[0], TEMP[0], IMM[0] \n"
115 " 3: END\n";
116
117 const char *origin_lower_left_text =
118 "FRAG\n"
119 "PROPERTY FS_COORD_ORIGIN LOWER_LEFT\n" /* lower-left = black corner */
120 "DCL IN[0], POSITION, LINEAR\n"
121 "DCL OUT[0], COLOR\n"
122 "DCL TEMP[0]\n"
123 "IMM FLT32 { 0.003333, 0.003333, 1.0, 1.0 }\n"
124 "IMM FLT32 { 0.0, 300.0, 0.0, 0.0 }\n"
125 " 0: MOV TEMP[0], IN[0] \n"
126 " 1: MOV TEMP[0].zw, IMM[1].xxxx \n"
127 " 2: MUL OUT[0], TEMP[0], IMM[0] \n"
128 " 3: END\n";
129
130 /* Test fragcoord center integer vs. half integer */
131 const char *center_integer_text =
132 "FRAG\n"
133 "PROPERTY FS_COORD_PIXEL_CENTER INTEGER \n" /* pixels are black */
134 "DCL IN[0], POSITION, LINEAR \n"
135 "DCL OUT[0], COLOR \n"
136 "DCL TEMP[0] \n"
137 "IMM FLT32 { 0.003333, 0.003333, 1.0, 1.0 } \n"
138 "IMM FLT32 { 0.0, 300.0, 0.0, 0.0 } \n"
139 "0: FRC TEMP[0], IN[0] \n"
140 "1: MOV TEMP[0].zw, IMM[1].xxxx \n"
141 "2: MOV OUT[0], TEMP[0] \n"
142 "3: END \n";
143
144 const char *center_half_integer_text =
145 "FRAG\n"
146 "PROPERTY FS_COORD_PIXEL_CENTER HALF_INTEGER \n" /* pixels are olive colored */
147 "DCL IN[0], POSITION, LINEAR \n"
148 "DCL OUT[0], COLOR \n"
149 "DCL TEMP[0] \n"
150 "IMM FLT32 { 0.003333, 0.003333, 1.0, 1.0 } \n"
151 "IMM FLT32 { 0.0, 300.0, 0.0, 0.0 } \n"
152 "0: FRC TEMP[0], IN[0] \n"
153 "1: MOV TEMP[0].zw, IMM[1].xxxx \n"
154 "2: MOV OUT[0], TEMP[0] \n"
155 "3: END \n";
156
157 const char *text;
158
159 if (mode == 0)
160 text = origin_upper_left_text;
161 else if (mode == 1)
162 text = origin_lower_left_text;
163 else if (mode == 2)
164 text = center_integer_text;
165 else
166 text = center_half_integer_text;
167
168 handle = graw_parse_fragment_shader(info.ctx, text);
169 info.ctx->bind_fs_state(info.ctx, handle);
170 }
171
172
173 static void
draw(void)174 draw(void)
175 {
176 union pipe_color_union clear_color;
177
178 clear_color.f[0] = 0.25;
179 clear_color.f[1] = 0.25;
180 clear_color.f[2] = 0.25;
181 clear_color.f[3] = 1.0;
182
183 info.ctx->clear(info.ctx,
184 PIPE_CLEAR_COLOR | PIPE_CLEAR_DEPTHSTENCIL,
185 &clear_color, 1.0, 0);
186 util_draw_arrays(info.ctx, PIPE_PRIM_QUADS, 0, NUM_VERTS);
187 info.ctx->flush(info.ctx, NULL);
188
189 #if 0
190 /* At the moment, libgraw leaks out/makes available some of the
191 * symbols from gallium/auxiliary, including these debug helpers.
192 * Will eventually want to bless some of these paths, and lock the
193 * others down so they aren't accessible from test programs.
194 *
195 * This currently just happens to work on debug builds - a release
196 * build will probably fail to link here:
197 */
198 debug_dump_surface_bmp(info.ctx, "result.bmp", surf);
199 #endif
200
201 graw_util_flush_front(&info);
202 }
203
204
205 #if 0
206 static void
207 resize(int w, int h)
208 {
209 width = w;
210 height = h;
211
212 set_viewport(0, 0, width, height, 30, 1000);
213 }
214 #endif
215
216
217 static void
init(int mode)218 init(int mode)
219 {
220 if (!graw_util_create_window(&info, width, height, 1, TRUE))
221 exit(1);
222
223 graw_util_default_state(&info, TRUE);
224
225 graw_util_viewport(&info, 0, 0, width, height, -1.0, 1.0);
226
227 set_vertices();
228 set_vertex_shader();
229 set_fragment_shader(mode);
230 }
231
232
233 int
main(int argc,char * argv[])234 main(int argc, char *argv[])
235 {
236 int mode = argc > 1 ? atoi(argv[1]) : 0;
237
238 switch (mode) {
239 default:
240 case 0:
241 printf("frag coord origin upper-left (lower-left = black)\n");
242 break;
243 case 1:
244 printf("frag coord origin lower-left (upper-left = black)\n");
245 break;
246 case 2:
247 printf("frag coord center integer (all pixels black)\n");
248 break;
249 case 3:
250 printf("frag coord center half-integer (all pixels olive color)\n");
251 break;
252 }
253
254 init(mode);
255
256 graw_set_display_func(draw);
257 /*graw_set_reshape_func(resize);*/
258 graw_main_loop();
259 return 0;
260 }
261