1 /* Display a cleared blue window. This demo has no dependencies on
2 * any utility code, just the graw interface and gallium.
3 */
4
5 #include "graw_util.h"
6
7 static const int WIDTH = 300;
8 static const int HEIGHT = 300;
9
10 static struct graw_info info;
11
12
13 static struct pipe_resource *texture = NULL;
14 static struct pipe_sampler_view *sv = NULL;
15 static void *sampler = NULL;
16
17 struct vertex {
18 float position[4];
19 float color[4];
20 };
21
22 static struct vertex vertices[] =
23 {
24 { { 0.9, -0.9, 0.0, 1.0 },
25 { 1, 0, 0, 1 } },
26
27 { { 0.9, 0.9, 0.0, 1.0 },
28 { 1, 1, 0, 1 } },
29
30 { {-0.9, 0.9, 0.0, 1.0 },
31 { 0, 1, 0, 1 } },
32
33 { {-0.9, -0.9, 0.0, 1.0 },
34 { 0, 0, 0, 1 } },
35 };
36
37
38
39
set_vertices(void)40 static void set_vertices( void )
41 {
42 struct pipe_vertex_element ve[2];
43 struct pipe_vertex_buffer vbuf;
44 void *handle;
45
46 memset(ve, 0, sizeof ve);
47
48 ve[0].src_offset = Offset(struct vertex, position);
49 ve[0].src_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
50 ve[1].src_offset = Offset(struct vertex, color);
51 ve[1].src_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
52
53 handle = info.ctx->create_vertex_elements_state(info.ctx, 2, ve);
54 info.ctx->bind_vertex_elements_state(info.ctx, handle);
55
56
57 vbuf.stride = sizeof( struct vertex );
58 vbuf.buffer_offset = 0;
59 vbuf.buffer = pipe_buffer_create_with_data(info.ctx,
60 PIPE_BIND_VERTEX_BUFFER,
61 PIPE_USAGE_STATIC,
62 sizeof(vertices),
63 vertices);
64
65 info.ctx->set_vertex_buffers(info.ctx, 1, &vbuf);
66 }
67
set_vertex_shader(void)68 static void set_vertex_shader( void )
69 {
70 void *handle;
71 const char *text =
72 "VERT\n"
73 "DCL IN[0]\n"
74 "DCL IN[1]\n"
75 "DCL OUT[0], POSITION\n"
76 "DCL OUT[1], GENERIC[0]\n"
77 " 0: MOV OUT[1], IN[1]\n"
78 " 1: MOV OUT[0], IN[0]\n"
79 " 2: END\n";
80
81 handle = graw_parse_vertex_shader(info.ctx, text);
82 info.ctx->bind_vs_state(info.ctx, handle);
83 }
84
set_fragment_shader(void)85 static void set_fragment_shader( void )
86 {
87 void *handle;
88 const char *text =
89 "FRAG\n"
90 "DCL IN[0], GENERIC[0], PERSPECTIVE\n"
91 "DCL OUT[0], COLOR\n"
92 "DCL TEMP[0]\n"
93 "DCL SAMP[0]\n"
94 " 0: TXP TEMP[0], IN[0], SAMP[0], 2D\n"
95 " 1: MOV OUT[0], TEMP[0]\n"
96 " 2: END\n";
97
98 handle = graw_parse_fragment_shader(info.ctx, text);
99 info.ctx->bind_fs_state(info.ctx, handle);
100 }
101
102
draw(void)103 static void draw( void )
104 {
105 union pipe_color_union clear_color = { {.5,.5,.5,1} };
106
107 info.ctx->clear(info.ctx, PIPE_CLEAR_COLOR, &clear_color, 0, 0);
108 util_draw_arrays(info.ctx, PIPE_PRIM_QUADS, 0, 4);
109 info.ctx->flush(info.ctx, NULL);
110
111 graw_save_surface_to_file(info.ctx, info.color_surf[0], NULL);
112
113 graw_util_flush_front(&info);
114 }
115
116
117 #define SIZE 16
118
init_tex(void)119 static void init_tex( void )
120 {
121 ubyte tex2d[SIZE][SIZE][4];
122 int s, t;
123
124 #if (SIZE != 2)
125 for (s = 0; s < SIZE; s++) {
126 for (t = 0; t < SIZE; t++) {
127 if (0) {
128 int x = (s ^ t) & 1;
129 tex2d[t][s][0] = (x) ? 0 : 63;
130 tex2d[t][s][1] = (x) ? 0 : 128;
131 tex2d[t][s][2] = 0;
132 tex2d[t][s][3] = 0xff;
133 }
134 else {
135 int x = ((s ^ t) >> 2) & 1;
136 tex2d[t][s][0] = s*255/(SIZE-1);
137 tex2d[t][s][1] = t*255/(SIZE-1);
138 tex2d[t][s][2] = (x) ? 0 : 128;
139 tex2d[t][s][3] = 0xff;
140 }
141 }
142 }
143 #else
144 tex2d[0][0][0] = 0;
145 tex2d[0][0][1] = 255;
146 tex2d[0][0][2] = 255;
147 tex2d[0][0][3] = 0;
148
149 tex2d[0][1][0] = 0;
150 tex2d[0][1][1] = 0;
151 tex2d[0][1][2] = 255;
152 tex2d[0][1][3] = 255;
153
154 tex2d[1][0][0] = 255;
155 tex2d[1][0][1] = 255;
156 tex2d[1][0][2] = 0;
157 tex2d[1][0][3] = 255;
158
159 tex2d[1][1][0] = 255;
160 tex2d[1][1][1] = 0;
161 tex2d[1][1][2] = 0;
162 tex2d[1][1][3] = 255;
163 #endif
164
165 texture = graw_util_create_tex2d(&info, SIZE, SIZE,
166 PIPE_FORMAT_B8G8R8A8_UNORM, tex2d);
167
168 sv = graw_util_create_simple_sampler_view(&info, texture);
169 info.ctx->set_fragment_sampler_views(info.ctx, 1, &sv);
170
171 sampler = graw_util_create_simple_sampler(&info,
172 PIPE_TEX_WRAP_REPEAT,
173 PIPE_TEX_FILTER_NEAREST);
174 info.ctx->bind_fragment_sampler_states(info.ctx, 1, &sampler);
175 }
176
177
init(void)178 static void init( void )
179 {
180 if (!graw_util_create_window(&info, WIDTH, HEIGHT, 1, FALSE))
181 exit(1);
182
183 graw_util_default_state(&info, FALSE);
184
185 {
186 struct pipe_rasterizer_state rasterizer;
187 void *handle;
188 memset(&rasterizer, 0, sizeof rasterizer);
189 rasterizer.cull_face = PIPE_FACE_NONE;
190 rasterizer.gl_rasterization_rules = 1;
191 rasterizer.depth_clip = 1;
192 handle = info.ctx->create_rasterizer_state(info.ctx, &rasterizer);
193 info.ctx->bind_rasterizer_state(info.ctx, handle);
194 }
195
196 graw_util_viewport(&info, 0, 0, WIDTH, HEIGHT, 30, 1000);
197
198 init_tex();
199
200 set_vertices();
201 set_vertex_shader();
202 set_fragment_shader();
203 }
204
205
args(int argc,char * argv[])206 static void args(int argc, char *argv[])
207 {
208 int i;
209
210 for (i = 1; i < argc;) {
211 if (graw_parse_args(&i, argc, argv)) {
212 continue;
213 }
214 exit(1);
215 }
216 }
217
main(int argc,char * argv[])218 int main( int argc, char *argv[] )
219 {
220 args(argc, argv);
221 init();
222
223 graw_set_display_func( draw );
224 graw_main_loop();
225 return 0;
226 }
227