| 1 | /** |
| 2 | * |
| 3 | * Elite - The New Kind. |
| 4 | * |
| 5 | * Allegro version of Graphics routines. |
| 6 | * |
| 7 | * The code in this file has not been derived from the original Elite code. |
| 8 | * Written by C.J.Pinder 1999-2001. |
| 9 | * email: <christian@newkind.co.uk> |
| 10 | * |
| 11 | * Routines for drawing anti-aliased lines and circles by T.Harte. |
| 12 | * |
| 13 | **/ |
| 14 | |
| 15 | #include <string.h> |
| 16 | #include <stdlib.h> |
| 17 | #include <stdio.h> |
| 18 | #include <math.h> |
| 19 | #include <ctype.h> |
| 20 | |
| 21 | #include "allegro.h" |
| 22 | |
| 23 | #include "config.h" |
| 24 | #include "gfx.h" |
| 25 | #include "alg_data.h" |
| 26 | #include "elite.h" |
| 27 | |
| 28 | BITMAP *gfx_screen; |
| 29 | volatile int frame_count; |
| 30 | DATAFILE *datafile; |
| 31 | BITMAP *scanner_image; |
| 32 | |
| 33 | #define MAX_POLYS 100 |
| 34 | |
| 35 | static int start_poly; |
| 36 | static int total_polys; |
| 37 | |
| 38 | struct poly_data |
| 39 | { |
| 40 | int z; |
| 41 | int no_points; |
| 42 | int face_colour; |
| 43 | int point_list[16]; |
| 44 | int next; |
| 45 | }; |
| 46 | |
| 47 | static struct poly_data poly_chain[MAX_POLYS]; |
| 48 | |
| 49 | |
| 50 | |
| 51 | |
| 52 | void frame_timer (void) |
| 53 | { |
| 54 | frame_count++; |
| 55 | } |
| 56 | END_OF_FUNCTION(frame_timer); |
| 57 | |
| 58 | |
| 59 | |
| 60 | int gfx_graphics_startup (void) |
| 61 | { |
| 62 | PALETTE the_palette; |
| 63 | int rv; |
| 64 | |
| 65 | #ifdef ALLEGRO_WINDOWS |
| 66 | |
| 67 | #ifdef RES_512_512 |
| 68 | rv = set_gfx_mode(GFX_DIRECTX_OVL, 512, 512, 0, 0); |
| 69 | |
| 70 | if (rv != 0) |
| 71 | rv = set_gfx_mode(GFX_DIRECTX_WIN, 512, 512, 0, 0); |
| 72 | |
| 73 | if (rv != 0) |
| 74 | rv = set_gfx_mode(GFX_GDI, 512, 512, 0, 0); |
| 75 | |
| 76 | if (rv == 0) |
| 77 | set_display_switch_mode (SWITCH_BACKGROUND); |
| 78 | #else |
| 79 | rv = set_gfx_mode(GFX_DIRECTX, 800, 600, 0, 0); |
| 80 | |
| 81 | if (rv != 0) |
| 82 | rv = set_gfx_mode(GFX_GDI, 800, 600, 0, 0); |
| 83 | #endif |
| 84 | |
| 85 | #else |
| 86 | rv = set_gfx_mode(GFX_AUTODETECT, 800, 600, 0, 0); |
| 87 | #endif |
| 88 | |
| 89 | if (rv != 0) |
| 90 | { |
| 91 | set_gfx_mode(GFX_TEXT, 0, 0, 0, 0); |
| 92 | allegro_message("Unable to set graphics mode."); |
| 93 | return 1; |
| 94 | } |
| 95 | |
| 96 | datafile = load_datafile("elite.dat"); |
| 97 | if (!datafile) |
| 98 | { |
| 99 | set_gfx_mode(GFX_TEXT, 0, 0, 0, 0); |
| 100 | allegro_message("Error loading %s!\n", "elite.dat"); |
| 101 | return 1; |
| 102 | } |
| 103 | |
| 104 | scanner_image = load_bitmap(scanner_filename, the_palette); |
| 105 | if (!scanner_image) |
| 106 | { |
| 107 | set_gfx_mode(GFX_TEXT, 0, 0, 0, 0); |
| 108 | allegro_message("Error reading scanner bitmap file.\n"); |
| 109 | return 1; |
| 110 | } |
| 111 | |
| 112 | /* select the scanner palette */ |
| 113 | set_palette(the_palette); |
| 114 | |
| 115 | /* Create the screen buffer bitmap */ |
| 116 | gfx_screen = create_bitmap (SCREEN_W, SCREEN_H); |
| 117 | |
| 118 | clear (gfx_screen); |
| 119 | |
| 120 | blit (scanner_image, gfx_screen, 0, 0, GFX_X_OFFSET, 385+GFX_Y_OFFSET, scanner_image->w, scanner_image->h); |
| 121 | gfx_draw_line (0, 0, 0, 384); |
| 122 | gfx_draw_line (0, 0, 511, 0); |
| 123 | gfx_draw_line (511, 0, 511, 384); |
| 124 | |
| 125 | /* Install a timer to regulate the speed of the game... */ |
| 126 | |
| 127 | LOCK_VARIABLE(frame_count); |
| 128 | LOCK_FUNCTION(frame_timer); |
| 129 | frame_count = 0; |
| 130 | install_int (frame_timer, speed_cap); |
| 131 | |
| 132 | return 0; |
| 133 | } |
| 134 | |
| 135 | |
| 136 | void gfx_graphics_shutdown (void) |
| 137 | { |
| 138 | destroy_bitmap(scanner_image); |
| 139 | destroy_bitmap(gfx_screen); |
| 140 | unload_datafile(datafile); |
| 141 | } |
| 142 | |
| 143 | |
| 144 | /* |
| 145 | * Blit the back buffer to the screen. |
| 146 | */ |
| 147 | |
| 148 | void gfx_update_screen (void) |
| 149 | { |
| 150 | while (frame_count < 1) |
| 151 | rest (10); |
| 152 | frame_count = 0; |
| 153 | |
| 154 | acquire_screen(); |
| 155 | blit (gfx_screen, screen, GFX_X_OFFSET, GFX_Y_OFFSET, GFX_X_OFFSET, GFX_Y_OFFSET, 512, 512); |
| 156 | release_screen(); |
| 157 | } |
| 158 | |
| 159 | |
| 160 | void gfx_acquire_screen (void) |
| 161 | { |
| 162 | acquire_bitmap (gfx_screen); |
| 163 | } |
| 164 | |
| 165 | |
| 166 | void gfx_release_screen (void) |
| 167 | { |
| 168 | release_bitmap(gfx_screen); |
| 169 | } |
| 170 | |
| 171 | void gfx_fast_plot_pixel (int x, int y, int col) |
| 172 | { |
| 173 | // _putpixel(gfx_screen, x, y, col); |
| 174 | gfx_screen->line[y][x] = col; |
| 175 | } |
| 176 | |
| 177 | |
| 178 | void gfx_plot_pixel (int x, int y, int col) |
| 179 | { |
| 180 | putpixel (gfx_screen, x + GFX_X_OFFSET, y + GFX_Y_OFFSET, col); |
| 181 | } |
| 182 | |
| 183 | |
| 184 | void gfx_draw_filled_circle (int cx, int cy, int radius, int circle_colour) |
| 185 | { |
| 186 | circlefill (gfx_screen, cx + GFX_X_OFFSET, cy + GFX_Y_OFFSET, radius, circle_colour); |
| 187 | } |
| 188 | |
| 189 | |
| 190 | #define AA_BITS 3 |
| 191 | #define AA_AND 7 |
| 192 | #define AA_BASE 235 |
| 193 | |
| 194 | #define trunc(x) ((x) & ~65535) |
| 195 | #define frac(x) ((x) & 65535) |
| 196 | #define invfrac(x) (65535-frac(x)) |
| 197 | #define plot(x,y,c) putpixel(gfx_screen, (x), (y), (c)+AA_BASE) |
| 198 | |
| 199 | /* |
| 200 | * Draw anti-aliased wireframe circle. |
| 201 | * By T.Harte. |
| 202 | */ |
| 203 | |
| 204 | void gfx_draw_aa_circle(int cx, int cy, int radius) |
| 205 | { |
| 206 | int x,y; |
| 207 | int s; |
| 208 | int sx, sy; |
| 209 | |
| 210 | cx += GFX_X_OFFSET; |
| 211 | cy += GFX_Y_OFFSET; |
| 212 | |
| 213 | radius >>= (16 - AA_BITS); |
| 214 | |
| 215 | x = radius; |
| 216 | s = -radius; |
| 217 | y = 0; |
| 218 | |
| 219 | while (y <= x) |
| 220 | { |
| 221 | //wide pixels |
| 222 | sx = cx + (x >> AA_BITS); sy = cy + (y >> AA_BITS); |
| 223 | |
| 224 | plot(sx, sy, AA_AND - (x&AA_AND)); |
| 225 | plot(sx + 1, sy, x&AA_AND); |
| 226 | |
| 227 | sy = cy - (y >> AA_BITS); |
| 228 | |
| 229 | plot(sx, sy, AA_AND - (x&AA_AND)); |
| 230 | plot(sx + 1, sy, x&AA_AND); |
| 231 | |
| 232 | sx = cx - (x >> AA_BITS); |
| 233 | |
| 234 | plot(sx, sy, AA_AND - (x&AA_AND)); |
| 235 | plot(sx - 1, sy, x&AA_AND); |
| 236 | |
| 237 | sy = cy + (y >> AA_BITS); |
| 238 | |
| 239 | plot(sx, sy, AA_AND - (x&AA_AND)); |
| 240 | plot(sx - 1, sy, x&AA_AND); |
| 241 | |
| 242 | //tall pixels |
| 243 | sx = cx + (y >> AA_BITS); sy = cy + (x >> AA_BITS); |
| 244 | |
| 245 | plot(sx, sy, AA_AND - (x&AA_AND)); |
| 246 | plot(sx, sy + 1, x&AA_AND); |
| 247 | |
| 248 | sy = cy - (x >> AA_BITS); |
| 249 | |
| 250 | plot(sx, sy, AA_AND - (x&AA_AND)); |
| 251 | plot(sx, sy - 1, x&AA_AND); |
| 252 | |
| 253 | sx = cx - (y >> AA_BITS); |
| 254 | |
| 255 | plot(sx, sy, AA_AND - (x&AA_AND)); |
| 256 | plot(sx, sy - 1, x&AA_AND); |
| 257 | |
| 258 | sy = cy + (x >> AA_BITS); |
| 259 | |
| 260 | plot(sx, sy, AA_AND - (x&AA_AND)); |
| 261 | plot(sx, sy + 1, x&AA_AND); |
| 262 | |
| 263 | s += AA_AND+1 + (y << (AA_BITS+1)) + ((1 << (AA_BITS+2))-2); |
| 264 | y += AA_AND+1; |
| 265 | |
| 266 | while(s >= 0) |
| 267 | { |
| 268 | s -= (x << 1) + 2; |
| 269 | x --; |
| 270 | } |
| 271 | } |
| 272 | } |
| 273 | |
| 274 | |
| 275 | /* |
| 276 | * Draw anti-aliased line. |
| 277 | * By T.Harte. |
| 278 | */ |
| 279 | |
| 280 | void gfx_draw_aa_line (int x1, int y1, int x2, int y2) |
| 281 | { |
| 282 | fixed grad, xd, yd; |
| 283 | fixed xgap, ygap, xend, yend, xf, yf; |
| 284 | fixed brightness1, brightness2, swap; |
| 285 | |
| 286 | int x, y, ix1, ix2, iy1, iy2; |
| 287 | |
| 288 | x1 += itofix(GFX_X_OFFSET); |
| 289 | x2 += itofix(GFX_X_OFFSET); |
| 290 | y1 += itofix(GFX_Y_OFFSET); |
| 291 | y2 += itofix(GFX_Y_OFFSET); |
| 292 | |
| 293 | xd = x2 - x1; |
| 294 | yd = y2 - y1; |
| 295 | |
| 296 | if (abs(xd) > abs(yd)) |
| 297 | { |
| 298 | if(x1 > x2) |
| 299 | { |
| 300 | swap = x1; x1 = x2; x2 = swap; |
| 301 | swap = y1; y1 = y2; y2 = swap; |
| 302 | xd = -xd; |
| 303 | yd = -yd; |
| 304 | } |
| 305 | |
| 306 | grad = fdiv(yd, xd); |
| 307 | |
| 308 | //end point 1 |
| 309 | |
| 310 | xend = trunc(x1 + 32768); |
| 311 | yend = y1 + fmul(grad, xend-x1); |
| 312 | |
| 313 | xgap = invfrac(x1+32768); |
| 314 | |
| 315 | ix1 = xend >> 16; |
| 316 | iy1 = yend >> 16; |
| 317 | |
| 318 | brightness1 = fmul(invfrac(yend), xgap); |
| 319 | brightness2 = fmul(frac(yend), xgap); |
| 320 | |
| 321 | plot(ix1, iy1, brightness1 >> (16-AA_BITS)); |
| 322 | plot(ix1, iy1+1, brightness2 >> (16-AA_BITS)); |
| 323 | |
| 324 | yf = yend+grad; |
| 325 | |
| 326 | //end point 2; |
| 327 | |
| 328 | xend = trunc(x2 + 32768); |
| 329 | yend = y2 + fmul(grad, xend-x2); |
| 330 | |
| 331 | xgap = invfrac(x2 - 32768); |
| 332 | |
| 333 | ix2 = xend >> 16; |
| 334 | iy2 = yend >> 16; |
| 335 | |
| 336 | brightness1 = fmul(invfrac(yend), xgap); |
| 337 | brightness2 = fmul(frac(yend), xgap); |
| 338 | |
| 339 | plot(ix2, iy2, brightness1 >> (16-AA_BITS)); |
| 340 | plot(ix2, iy2+1, brightness2 >> (16-AA_BITS)); |
| 341 | |
| 342 | for(x = ix1+1; x <= ix2-1; x++) |
| 343 | { |
| 344 | brightness1 = invfrac(yf); |
| 345 | brightness2 = frac(yf); |
| 346 | |
| 347 | plot(x, (yf >> 16), brightness1 >> (16-AA_BITS)); |
| 348 | plot(x, 1+(yf >> 16), brightness2 >> (16-AA_BITS)); |
| 349 | |
| 350 | yf += grad; |
| 351 | } |
| 352 | } |
| 353 | else |
| 354 | { |
| 355 | if(y1 > y2) |
| 356 | { |
| 357 | swap = x1; x1 = x2; x2 = swap; |
| 358 | swap = y1; y1 = y2; y2 = swap; |
| 359 | xd = -xd; |
| 360 | yd = -yd; |
| 361 | } |
| 362 | |
| 363 | grad = fdiv(xd, yd); |
| 364 | |
| 365 | //end point 1 |
| 366 | |
| 367 | yend = trunc(y1 + 32768); |
| 368 | xend = x1 + fmul(grad, yend-y1); |
| 369 | |
| 370 | ygap = invfrac(y1+32768); |
| 371 | |
| 372 | iy1 = yend >> 16; |
| 373 | ix1 = xend >> 16; |
| 374 | |
| 375 | brightness1 = fmul(invfrac(xend), ygap); |
| 376 | brightness2 = fmul(frac(xend), ygap); |
| 377 | |
| 378 | plot(ix1, iy1, brightness1 >> (16-AA_BITS)); |
| 379 | plot(ix1+1, iy1, brightness2 >> (16-AA_BITS)); |
| 380 | |
| 381 | xf = xend+grad; |
| 382 | |
| 383 | //end point 2; |
| 384 | |
| 385 | yend = trunc(y2 + 32768); |
| 386 | xend = x2 + fmul(grad, yend-y2); |
| 387 | |
| 388 | ygap = invfrac(y2 - 32768); |
| 389 | |
| 390 | ix2 = xend >> 16; |
| 391 | iy2 = yend >> 16; |
| 392 | |
| 393 | brightness1 = fmul(invfrac(xend), ygap); |
| 394 | brightness2 = fmul(frac(xend), ygap); |
| 395 | |
| 396 | plot(ix2, iy2, brightness1 >> (16-AA_BITS)); |
| 397 | plot(ix2+1, iy2, brightness2 >> (16-AA_BITS)); |
| 398 | |
| 399 | for(y = iy1+1; y <= iy2-1; y++) |
| 400 | { |
| 401 | brightness1 = invfrac(xf); |
| 402 | brightness2 = frac(xf); |
| 403 | |
| 404 | plot((xf >> 16), y, brightness1 >> (16-AA_BITS)); |
| 405 | plot(1+(xf >> 16), y, brightness2 >> (16-AA_BITS)); |
| 406 | |
| 407 | xf += grad; |
| 408 | } |
| 409 | } |
| 410 | } |
| 411 | |
| 412 | #undef trunc |
| 413 | #undef frac |
| 414 | #undef invfrac |
| 415 | #undef plot |
| 416 | |
| 417 | #undef AA_BITS |
| 418 | #undef AA_AND |
| 419 | #undef AA_BASE |
| 420 | |
| 421 | |
| 422 | |
| 423 | void gfx_draw_circle (int cx, int cy, int radius, int circle_colour) |
| 424 | { |
| 425 | if (anti_alias_gfx && (circle_colour == GFX_COL_WHITE)) |
| 426 | gfx_draw_aa_circle (cx, cy, itofix(radius)); |
| 427 | else |
| 428 | circle (gfx_screen, cx + GFX_X_OFFSET, cy + GFX_Y_OFFSET, radius, circle_colour); |
| 429 | } |
| 430 | |
| 431 | |
| 432 | |
| 433 | void gfx_draw_line (int x1, int y1, int x2, int y2) |
| 434 | { |
| 435 | if (y1 == y2) |
| 436 | { |
| 437 | hline (gfx_screen, x1 + GFX_X_OFFSET, y1 + GFX_Y_OFFSET, x2 + GFX_X_OFFSET, GFX_COL_WHITE); |
| 438 | return; |
| 439 | } |
| 440 | |
| 441 | if (x1 == x2) |
| 442 | { |
| 443 | vline (gfx_screen, x1 + GFX_X_OFFSET, y1 + GFX_Y_OFFSET, y2 + GFX_Y_OFFSET, GFX_COL_WHITE); |
| 444 | return; |
| 445 | } |
| 446 | |
| 447 | if (anti_alias_gfx) |
| 448 | gfx_draw_aa_line (itofix(x1), itofix(y1), itofix(x2), itofix(y2)); |
| 449 | else |
| 450 | line (gfx_screen, x1 + GFX_X_OFFSET, y1 + GFX_Y_OFFSET, x2 + GFX_X_OFFSET, y2 + GFX_Y_OFFSET, GFX_COL_WHITE); |
| 451 | } |
| 452 | |
| 453 | |
| 454 | |
| 455 | void gfx_draw_colour_line (int x1, int y1, int x2, int y2, int line_colour) |
| 456 | { |
| 457 | if (y1 == y2) |
| 458 | { |
| 459 | hline (gfx_screen, x1 + GFX_X_OFFSET, y1 + GFX_Y_OFFSET, x2 + GFX_X_OFFSET, line_colour); |
| 460 | return; |
| 461 | } |
| 462 | |
| 463 | if (x1 == x2) |
| 464 | { |
| 465 | vline (gfx_screen, x1 + GFX_X_OFFSET, y1 + GFX_Y_OFFSET, y2 + GFX_Y_OFFSET, line_colour); |
| 466 | return; |
| 467 | } |
| 468 | |
| 469 | if (anti_alias_gfx && (line_colour == GFX_COL_WHITE)) |
| 470 | gfx_draw_aa_line (itofix(x1), itofix(y1), itofix(x2), itofix(y2)); |
| 471 | else |
| 472 | line (gfx_screen, x1 + GFX_X_OFFSET, y1 + GFX_Y_OFFSET, x2 + GFX_X_OFFSET, y2 + GFX_Y_OFFSET, line_colour); |
| 473 | } |
| 474 | |
| 475 | |
| 476 | |
| 477 | void gfx_draw_triangle (int x1, int y1, int x2, int y2, int x3, int y3, int col) |
| 478 | { |
| 479 | triangle (gfx_screen, x1 + GFX_X_OFFSET, y1 + GFX_Y_OFFSET, x2 + GFX_X_OFFSET, y2 + GFX_Y_OFFSET, |
| 480 | x3 + GFX_X_OFFSET, y3 + GFX_Y_OFFSET, col); |
| 481 | } |
| 482 | |
| 483 | |
| 484 | |
| 485 | void gfx_display_text (int x, int y, char *txt) |
| 486 | { |
| 487 | text_mode (-1); |
| 488 | textout (gfx_screen, datafile[ELITE_1].dat, txt, (x / (2 / GFX_SCALE)) + GFX_X_OFFSET, (y / (2 / GFX_SCALE)) + GFX_Y_OFFSET, GFX_COL_WHITE); |
| 489 | } |
| 490 | |
| 491 | |
| 492 | void gfx_display_colour_text (int x, int y, char *txt, int col) |
| 493 | { |
| 494 | text_mode (-1); |
| 495 | textout (gfx_screen, datafile[ELITE_1].dat, txt, (x / (2 / GFX_SCALE)) + GFX_X_OFFSET, (y / (2 / GFX_SCALE)) + GFX_Y_OFFSET, col); |
| 496 | } |
| 497 | |
| 498 | |
| 499 | |
| 500 | void gfx_display_centre_text (int y, char *str, int psize, int col) |
| 501 | { |
| 502 | int txt_size; |
| 503 | int txt_colour; |
| 504 | |
| 505 | if (psize == 140) |
| 506 | { |
| 507 | txt_size = ELITE_2; |
| 508 | txt_colour = -1; |
| 509 | } |
| 510 | else |
| 511 | { |
| 512 | txt_size = ELITE_1; |
| 513 | txt_colour = col; |
| 514 | } |
| 515 | |
| 516 | text_mode (-1); |
| 517 | textout_centre (gfx_screen, datafile[txt_size].dat, str, (128 * GFX_SCALE) + GFX_X_OFFSET, (y / (2 / GFX_SCALE)) + GFX_Y_OFFSET, txt_colour); |
| 518 | } |
| 519 | |
| 520 | |
| 521 | void gfx_clear_display (void) |
| 522 | { |
| 523 | rectfill (gfx_screen, GFX_X_OFFSET + 1, GFX_Y_OFFSET + 1, 510 + GFX_X_OFFSET, 383 + GFX_Y_OFFSET, GFX_COL_BLACK); |
| 524 | } |
| 525 | |
| 526 | void gfx_clear_text_area (void) |
| 527 | { |
| 528 | rectfill (gfx_screen, GFX_X_OFFSET + 1, GFX_Y_OFFSET + 340, 510 + GFX_X_OFFSET, 383 + GFX_Y_OFFSET, GFX_COL_BLACK); |
| 529 | } |
| 530 | |
| 531 | |
| 532 | void gfx_clear_area (int tx, int ty, int bx, int by) |
| 533 | { |
| 534 | rectfill (gfx_screen, tx + GFX_X_OFFSET, ty + GFX_Y_OFFSET, |
| 535 | bx + GFX_X_OFFSET, by + GFX_Y_OFFSET, GFX_COL_BLACK); |
| 536 | } |
| 537 | |
| 538 | void gfx_draw_rectangle (int tx, int ty, int bx, int by, int col) |
| 539 | { |
| 540 | rectfill (gfx_screen, tx + GFX_X_OFFSET, ty + GFX_Y_OFFSET, |
| 541 | bx + GFX_X_OFFSET, by + GFX_Y_OFFSET, col); |
| 542 | } |
| 543 | |
| 544 | |
| 545 | void gfx_display_pretty_text (int tx, int ty, int bx, int by, char *txt) |
| 546 | { |
| 547 | char strbuf[100]; |
| 548 | char *str; |
| 549 | char *bptr; |
| 550 | int len; |
| 551 | int pos; |
| 552 | int maxlen; |
| 553 | |
| 554 | maxlen = (bx - tx) / 8; |
| 555 | |
| 556 | str = txt; |
| 557 | len = strlen(txt); |
| 558 | |
| 559 | while (len > 0) |
| 560 | { |
| 561 | pos = maxlen; |
| 562 | if (pos > len) |
| 563 | pos = len; |
| 564 | |
| 565 | while ((str[pos] != ' ') && (str[pos] != ',') && |
| 566 | (str[pos] != '.') && (str[pos] != '\0')) |
| 567 | { |
| 568 | pos--; |
| 569 | } |
| 570 | |
| 571 | len = len - pos - 1; |
| 572 | |
| 573 | for (bptr = strbuf; pos >= 0; pos--) |
| 574 | *bptr++ = *str++; |
| 575 | |
| 576 | *bptr = '\0'; |
| 577 | |
| 578 | text_mode (-1); |
| 579 | textout (gfx_screen, datafile[ELITE_1].dat, strbuf, tx + GFX_X_OFFSET, ty + GFX_Y_OFFSET, GFX_COL_WHITE); |
| 580 | ty += (8 * GFX_SCALE); |
| 581 | } |
| 582 | } |
| 583 | |
| 584 | |
| 585 | void gfx_draw_scanner (void) |
| 586 | { |
| 587 | blit (scanner_image, gfx_screen, 0, 0, GFX_X_OFFSET, 385+GFX_Y_OFFSET, scanner_image->w, scanner_image->h); |
| 588 | } |
| 589 | |
| 590 | void gfx_set_clip_region (int tx, int ty, int bx, int by) |
| 591 | { |
| 592 | set_clip (gfx_screen, tx + GFX_X_OFFSET, ty + GFX_Y_OFFSET, bx + GFX_X_OFFSET, by + GFX_Y_OFFSET); |
| 593 | } |
| 594 | |
| 595 | |
| 596 | void gfx_start_render (void) |
| 597 | { |
| 598 | start_poly = 0; |
| 599 | total_polys = 0; |
| 600 | } |
| 601 | |
| 602 | |
| 603 | void gfx_render_polygon (int num_points, int *point_list, int face_colour, int zavg) |
| 604 | { |
| 605 | int i; |
| 606 | int x; |
| 607 | int nx; |
| 608 | |
| 609 | if (total_polys == MAX_POLYS) |
| 610 | return; |
| 611 | |
| 612 | x = total_polys; |
| 613 | total_polys++; |
| 614 | |
| 615 | poly_chain[x].no_points = num_points; |
| 616 | poly_chain[x].face_colour = face_colour; |
| 617 | poly_chain[x].z = zavg; |
| 618 | poly_chain[x].next = -1; |
| 619 | |
| 620 | for (i = 0; i < 16; i++) |
| 621 | poly_chain[x].point_list[i] = point_list[i]; |
| 622 | |
| 623 | if (x == 0) |
| 624 | return; |
| 625 | |
| 626 | if (zavg > poly_chain[start_poly].z) |
| 627 | { |
| 628 | poly_chain[x].next = start_poly; |
| 629 | start_poly = x; |
| 630 | return; |
| 631 | } |
| 632 | |
| 633 | for (i = start_poly; poly_chain[i].next != -1; i = poly_chain[i].next) |
| 634 | { |
| 635 | nx = poly_chain[i].next; |
| 636 | |
| 637 | if (zavg > poly_chain[nx].z) |
| 638 | { |
| 639 | poly_chain[i].next = x; |
| 640 | poly_chain[x].next = nx; |
| 641 | return; |
| 642 | } |
| 643 | } |
| 644 | |
| 645 | poly_chain[i].next = x; |
| 646 | } |
| 647 | |
| 648 | |
| 649 | void gfx_render_line (int x1, int y1, int x2, int y2, int dist, int col) |
| 650 | { |
| 651 | int point_list[4]; |
| 652 | |
| 653 | point_list[0] = x1; |
| 654 | point_list[1] = y1; |
| 655 | point_list[2] = x2; |
| 656 | point_list[3] = y2; |
| 657 | |
| 658 | gfx_render_polygon (2, point_list, col, dist); |
| 659 | } |
| 660 | |
| 661 | |
| 662 | void gfx_finish_render (void) |
| 663 | { |
| 664 | int num_points; |
| 665 | int *pl; |
| 666 | int i; |
| 667 | int col; |
| 668 | |
| 669 | if (total_polys == 0) |
| 670 | return; |
| 671 | |
| 672 | for (i = start_poly; i != -1; i = poly_chain[i].next) |
| 673 | { |
| 674 | num_points = poly_chain[i].no_points; |
| 675 | pl = poly_chain[i].point_list; |
| 676 | col = poly_chain[i].face_colour; |
| 677 | |
| 678 | if (num_points == 2) |
| 679 | { |
| 680 | gfx_draw_colour_line (pl[0], pl[1], pl[2], pl[3], col); |
| 681 | continue; |
| 682 | } |
| 683 | |
| 684 | gfx_polygon (num_points, pl, col); |
| 685 | }; |
| 686 | } |
| 687 | |
| 688 | |
| 689 | void gfx_polygon (int num_points, int *poly_list, int face_colour) |
| 690 | { |
| 691 | int i; |
| 692 | int x,y; |
| 693 | |
| 694 | x = 0; |
| 695 | y = 1; |
| 696 | for (i = 0; i < num_points; i++) |
| 697 | { |
| 698 | poly_list[x] += GFX_X_OFFSET; |
| 699 | poly_list[y] += GFX_Y_OFFSET; |
| 700 | x += 2; |
| 701 | y += 2; |
| 702 | } |
| 703 | |
| 704 | polygon (gfx_screen, num_points, poly_list, face_colour); |
| 705 | } |
| 706 | |
| 707 | |
| 708 | void gfx_draw_sprite (int sprite_no, int x, int y) |
| 709 | { |
| 710 | BITMAP *sprite_bmp; |
| 711 | |
| 712 | switch (sprite_no) |
| 713 | { |
| 714 | case IMG_GREEN_DOT: |
| 715 | sprite_bmp = datafile[GRNDOT].dat; |
| 716 | break; |
| 717 | |
| 718 | case IMG_RED_DOT: |
| 719 | sprite_bmp = datafile[REDDOT].dat; |
| 720 | break; |
| 721 | |
| 722 | case IMG_BIG_S: |
| 723 | sprite_bmp = datafile[SAFE].dat; |
| 724 | break; |
| 725 | |
| 726 | case IMG_ELITE_TXT: |
| 727 | sprite_bmp = datafile[ELITETXT].dat; |
| 728 | break; |
| 729 | |
| 730 | case IMG_BIG_E: |
| 731 | sprite_bmp = datafile[ECM].dat; |
| 732 | break; |
| 733 | |
| 734 | case IMG_BLAKE: |
| 735 | sprite_bmp = datafile[BLAKE].dat; |
| 736 | break; |
| 737 | |
| 738 | case IMG_MISSILE_GREEN: |
| 739 | sprite_bmp = datafile[MISSILE_G].dat; |
| 740 | break; |
| 741 | |
| 742 | case IMG_MISSILE_YELLOW: |
| 743 | sprite_bmp = datafile[MISSILE_Y].dat; |
| 744 | break; |
| 745 | |
| 746 | case IMG_MISSILE_RED: |
| 747 | sprite_bmp = datafile[MISSILE_R].dat; |
| 748 | break; |
| 749 | |
| 750 | default: |
| 751 | return; |
| 752 | } |
| 753 | |
| 754 | if (x == -1) |
| 755 | x = ((256 * GFX_SCALE) - sprite_bmp->w) / 2; |
| 756 | |
| 757 | draw_sprite (gfx_screen, sprite_bmp, x + GFX_X_OFFSET, y + GFX_Y_OFFSET); |
| 758 | } |
| 759 | |
| 760 | |
| 761 | int gfx_request_file (char *title, char *path, char *ext) |
| 762 | { |
| 763 | int okay; |
| 764 | |
| 765 | show_mouse (screen); |
| 766 | okay = file_select (title, path, ext); |
| 767 | show_mouse (NULL); |
| 768 | |
| 769 | return okay; |
| 770 | } |
| 771 | |