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 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 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 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 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 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 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
