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 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 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 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 } 101 102 103 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 16 118 119 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 } 176 177 178 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 } 204 205 206 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 } 217 218 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
