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 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 memset(&vbuf, 0, sizeof vbuf); 68 69 vbuf.stride = sizeof(struct vertex); 70 vbuf.buffer_offset = 0; 71 vbuf.buffer = pipe_buffer_create_with_data(info.ctx, 72 PIPE_BIND_VERTEX_BUFFER, 73 PIPE_USAGE_DEFAULT, 74 sizeof(vertices), 75 vertices); 76 77 info.ctx->set_vertex_buffers(info.ctx, 0, 1, &vbuf); 78 } 79 80 81 static void 82 set_vertex_shader(void) 83 { 84 void *handle; 85 const char *text = 86 "VERT\n" 87 "DCL IN[0]\n" 88 "DCL IN[1]\n" 89 "DCL OUT[0], POSITION\n" 90 "DCL OUT[1], GENERIC[0]\n" 91 " 0: MOV OUT[0], IN[0]\n" 92 " 1: MOV OUT[1], IN[1]\n" 93 " 2: END\n"; 94 95 handle = graw_parse_vertex_shader(info.ctx, text); 96 info.ctx->bind_vs_state(info.ctx, handle); 97 } 98 99 100 static void 101 set_fragment_shader(int mode) 102 { 103 void *handle; 104 105 const char *origin_upper_left_text = 106 "FRAG\n" 107 "PROPERTY FS_COORD_ORIGIN UPPER_LEFT\n" /* upper-left = black corner */ 108 "DCL IN[0], POSITION, LINEAR\n" 109 "DCL OUT[0], COLOR\n" 110 "DCL TEMP[0]\n" 111 "IMM FLT32 { 0.003333, 0.003333, 1.0, 1.0 }\n" 112 "IMM FLT32 { 0.0, 300.0, 0.0, 0.0 }\n" 113 " 0: MOV TEMP[0], IN[0] \n" 114 " 1: MOV TEMP[0].zw, IMM[1].xxxx \n" 115 " 2: MUL OUT[0], TEMP[0], IMM[0] \n" 116 " 3: END\n"; 117 118 const char *origin_lower_left_text = 119 "FRAG\n" 120 "PROPERTY FS_COORD_ORIGIN LOWER_LEFT\n" /* lower-left = black corner */ 121 "DCL IN[0], POSITION, LINEAR\n" 122 "DCL OUT[0], COLOR\n" 123 "DCL TEMP[0]\n" 124 "IMM FLT32 { 0.003333, 0.003333, 1.0, 1.0 }\n" 125 "IMM FLT32 { 0.0, 300.0, 0.0, 0.0 }\n" 126 " 0: MOV TEMP[0], IN[0] \n" 127 " 1: MOV TEMP[0].zw, IMM[1].xxxx \n" 128 " 2: MUL OUT[0], TEMP[0], IMM[0] \n" 129 " 3: END\n"; 130 131 /* Test fragcoord center integer vs. half integer */ 132 const char *center_integer_text = 133 "FRAG\n" 134 "PROPERTY FS_COORD_PIXEL_CENTER INTEGER \n" /* pixels are black */ 135 "DCL IN[0], POSITION, LINEAR \n" 136 "DCL OUT[0], COLOR \n" 137 "DCL TEMP[0] \n" 138 "IMM FLT32 { 0.003333, 0.003333, 1.0, 1.0 } \n" 139 "IMM FLT32 { 0.0, 300.0, 0.0, 0.0 } \n" 140 "0: FRC TEMP[0], IN[0] \n" 141 "1: MOV TEMP[0].zw, IMM[1].xxxx \n" 142 "2: MOV OUT[0], TEMP[0] \n" 143 "3: END \n"; 144 145 const char *center_half_integer_text = 146 "FRAG\n" 147 "PROPERTY FS_COORD_PIXEL_CENTER HALF_INTEGER \n" /* pixels are olive colored */ 148 "DCL IN[0], POSITION, LINEAR \n" 149 "DCL OUT[0], COLOR \n" 150 "DCL TEMP[0] \n" 151 "IMM FLT32 { 0.003333, 0.003333, 1.0, 1.0 } \n" 152 "IMM FLT32 { 0.0, 300.0, 0.0, 0.0 } \n" 153 "0: FRC TEMP[0], IN[0] \n" 154 "1: MOV TEMP[0].zw, IMM[1].xxxx \n" 155 "2: MOV OUT[0], TEMP[0] \n" 156 "3: END \n"; 157 158 const char *text; 159 160 if (mode == 0) 161 text = origin_upper_left_text; 162 else if (mode == 1) 163 text = origin_lower_left_text; 164 else if (mode == 2) 165 text = center_integer_text; 166 else 167 text = center_half_integer_text; 168 169 handle = graw_parse_fragment_shader(info.ctx, text); 170 info.ctx->bind_fs_state(info.ctx, handle); 171 } 172 173 174 static void 175 draw(void) 176 { 177 union pipe_color_union clear_color; 178 179 clear_color.f[0] = 0.25; 180 clear_color.f[1] = 0.25; 181 clear_color.f[2] = 0.25; 182 clear_color.f[3] = 1.0; 183 184 info.ctx->clear(info.ctx, 185 PIPE_CLEAR_COLOR | PIPE_CLEAR_DEPTHSTENCIL, 186 &clear_color, 1.0, 0); 187 util_draw_arrays(info.ctx, PIPE_PRIM_QUADS, 0, NUM_VERTS); 188 info.ctx->flush(info.ctx, NULL, 0); 189 190 #if 0 191 /* At the moment, libgraw leaks out/makes available some of the 192 * symbols from gallium/auxiliary, including these debug helpers. 193 * Will eventually want to bless some of these paths, and lock the 194 * others down so they aren't accessible from test programs. 195 * 196 * This currently just happens to work on debug builds - a release 197 * build will probably fail to link here: 198 */ 199 debug_dump_surface_bmp(info.ctx, "result.bmp", surf); 200 #endif 201 202 graw_util_flush_front(&info); 203 } 204 205 206 #if 0 207 static void 208 resize(int w, int h) 209 { 210 width = w; 211 height = h; 212 213 set_viewport(0, 0, width, height, 30, 1000); 214 } 215 #endif 216 217 218 static void 219 init(int mode) 220 { 221 if (!graw_util_create_window(&info, width, height, 1, TRUE)) 222 exit(1); 223 224 graw_util_default_state(&info, TRUE); 225 226 graw_util_viewport(&info, 0, 0, width, height, -1.0, 1.0); 227 228 set_vertices(); 229 set_vertex_shader(); 230 set_fragment_shader(mode); 231 } 232 233 234 int 235 main(int argc, char *argv[]) 236 { 237 int mode = argc > 1 ? atoi(argv[1]) : 0; 238 239 switch (mode) { 240 default: 241 case 0: 242 printf("frag coord origin upper-left (lower-left = black)\n"); 243 break; 244 case 1: 245 printf("frag coord origin lower-left (upper-left = black)\n"); 246 break; 247 case 2: 248 printf("frag coord center integer (all pixels black)\n"); 249 break; 250 case 3: 251 printf("frag coord center half-integer (all pixels olive color)\n"); 252 break; 253 } 254 255 init(mode); 256 257 graw_set_display_func(draw); 258 /*graw_set_reshape_func(resize);*/ 259 graw_main_loop(); 260 return 0; 261 } 262
