84bbd123 |
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 | |