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 memset(&vbuf, 0, sizeof vbuf);
57
58 vbuf.stride = sizeof( struct vertex );
59 vbuf.buffer_offset = 0;
60 vbuf.buffer.resource = pipe_buffer_create_with_data(info.ctx,
61 PIPE_BIND_VERTEX_BUFFER,
62 PIPE_USAGE_DEFAULT,
63 sizeof(vertices),
64 vertices);
65
66 info.ctx->set_vertex_buffers(info.ctx, 0, 1, &vbuf);
67 }
68
set_vertex_shader(void)69 static void set_vertex_shader( void )
70 {
71 void *handle;
72 const char *text =
73 "VERT\n"
74 "DCL IN[0]\n"
75 "DCL IN[1]\n"
76 "DCL OUT[0], POSITION\n"
77 "DCL OUT[1], GENERIC[0]\n"
78 " 0: MOV OUT[1], IN[1]\n"
79 " 1: MOV OUT[0], IN[0]\n"
80 " 2: END\n";
81
82 handle = graw_parse_vertex_shader(info.ctx, text);
83 info.ctx->bind_vs_state(info.ctx, handle);
84 }
85
set_fragment_shader(void)86 static void set_fragment_shader( void )
87 {
88 void *handle;
89 const char *text =
90 "FRAG\n"
91 "DCL IN[0], GENERIC[0], PERSPECTIVE\n"
92 "DCL OUT[0], COLOR\n"
93 "DCL TEMP[0]\n"
94 "DCL SAMP[0]\n"
95 "DCL SVIEW[0], 2D, FLOAT\n"
96 " 0: TXP TEMP[0], IN[0], SAMP[0], 2D\n"
97 " 1: MOV OUT[0], TEMP[0]\n"
98 " 2: END\n";
99
100 handle = graw_parse_fragment_shader(info.ctx, text);
101 info.ctx->bind_fs_state(info.ctx, handle);
102 }
103
104
draw(void)105 static void draw( void )
106 {
107 union pipe_color_union clear_color = { {.5,.5,.5,1} };
108
109 info.ctx->clear(info.ctx, PIPE_CLEAR_COLOR, &clear_color, 0, 0);
110 util_draw_arrays(info.ctx, PIPE_PRIM_QUADS, 0, 4);
111 info.ctx->flush(info.ctx, NULL, 0);
112
113 graw_save_surface_to_file(info.ctx, info.color_surf[0], NULL);
114
115 graw_util_flush_front(&info);
116 }
117
118
119 #define SIZE 16
120
init_tex(void)121 static void init_tex( void )
122 {
123 ubyte tex2d[SIZE][SIZE][4];
124 int s, t;
125
126 #if (SIZE != 2)
127 for (s = 0; s < SIZE; s++) {
128 for (t = 0; t < SIZE; t++) {
129 if (0) {
130 int x = (s ^ t) & 1;
131 tex2d[t][s][0] = (x) ? 0 : 63;
132 tex2d[t][s][1] = (x) ? 0 : 128;
133 tex2d[t][s][2] = 0;
134 tex2d[t][s][3] = 0xff;
135 }
136 else {
137 int x = ((s ^ t) >> 2) & 1;
138 tex2d[t][s][0] = s*255/(SIZE-1);
139 tex2d[t][s][1] = t*255/(SIZE-1);
140 tex2d[t][s][2] = (x) ? 0 : 128;
141 tex2d[t][s][3] = 0xff;
142 }
143 }
144 }
145 #else
146 tex2d[0][0][0] = 0;
147 tex2d[0][0][1] = 255;
148 tex2d[0][0][2] = 255;
149 tex2d[0][0][3] = 0;
150
151 tex2d[0][1][0] = 0;
152 tex2d[0][1][1] = 0;
153 tex2d[0][1][2] = 255;
154 tex2d[0][1][3] = 255;
155
156 tex2d[1][0][0] = 255;
157 tex2d[1][0][1] = 255;
158 tex2d[1][0][2] = 0;
159 tex2d[1][0][3] = 255;
160
161 tex2d[1][1][0] = 255;
162 tex2d[1][1][1] = 0;
163 tex2d[1][1][2] = 0;
164 tex2d[1][1][3] = 255;
165 #endif
166
167 texture = graw_util_create_tex2d(&info, SIZE, SIZE,
168 PIPE_FORMAT_B8G8R8A8_UNORM, tex2d);
169
170 sv = graw_util_create_simple_sampler_view(&info, texture);
171 info.ctx->set_sampler_views(info.ctx, PIPE_SHADER_FRAGMENT, 0, 1, &sv);
172
173 sampler = graw_util_create_simple_sampler(&info,
174 PIPE_TEX_WRAP_REPEAT,
175 PIPE_TEX_FILTER_NEAREST);
176 info.ctx->bind_sampler_states(info.ctx, PIPE_SHADER_FRAGMENT,
177 0, 1, &sampler);
178 }
179
180
init(void)181 static void init( void )
182 {
183 if (!graw_util_create_window(&info, WIDTH, HEIGHT, 1, FALSE))
184 exit(1);
185
186 graw_util_default_state(&info, FALSE);
187
188 {
189 struct pipe_rasterizer_state rasterizer;
190 void *handle;
191 memset(&rasterizer, 0, sizeof rasterizer);
192 rasterizer.cull_face = PIPE_FACE_NONE;
193 rasterizer.half_pixel_center = 1;
194 rasterizer.bottom_edge_rule = 1;
195 rasterizer.depth_clip = 1;
196 handle = info.ctx->create_rasterizer_state(info.ctx, &rasterizer);
197 info.ctx->bind_rasterizer_state(info.ctx, handle);
198 }
199
200 graw_util_viewport(&info, 0, 0, WIDTH, HEIGHT, 30, 1000);
201
202 init_tex();
203
204 set_vertices();
205 set_vertex_shader();
206 set_fragment_shader();
207 }
208
209
args(int argc,char * argv[])210 static void args(int argc, char *argv[])
211 {
212 int i;
213
214 for (i = 1; i < argc;) {
215 if (graw_parse_args(&i, argc, argv)) {
216 continue;
217 }
218 exit(1);
219 }
220 }
221
main(int argc,char * argv[])222 int main( int argc, char *argv[] )
223 {
224 args(argc, argv);
225 init();
226
227 graw_set_display_func( draw );
228 graw_main_loop();
229 return 0;
230 }
231