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 |
1a8abebd |
86 | rv = set_gfx_mode(prefer_window ? |
87 | GFX_AUTODETECT_WINDOWED : GFX_AUTODETECT, |
88 | 800, 600, 0, 0); |
84bbd123 |
89 | #endif |
90 | |
91 | if (rv != 0) |
92 | { |
93 | set_gfx_mode(GFX_TEXT, 0, 0, 0, 0); |
94 | allegro_message("Unable to set graphics mode."); |
95 | return 1; |
96 | } |
97 | |
98 | datafile = load_datafile("elite.dat"); |
99 | if (!datafile) |
100 | { |
101 | set_gfx_mode(GFX_TEXT, 0, 0, 0, 0); |
102 | allegro_message("Error loading %s!\n", "elite.dat"); |
103 | return 1; |
104 | } |
105 | |
106 | scanner_image = load_bitmap(scanner_filename, the_palette); |
107 | if (!scanner_image) |
108 | { |
109 | set_gfx_mode(GFX_TEXT, 0, 0, 0, 0); |
110 | allegro_message("Error reading scanner bitmap file.\n"); |
111 | return 1; |
112 | } |
113 | |
114 | /* select the scanner palette */ |
115 | set_palette(the_palette); |
116 | |
117 | /* Create the screen buffer bitmap */ |
118 | gfx_screen = create_bitmap (SCREEN_W, SCREEN_H); |
119 | |
120 | clear (gfx_screen); |
121 | |
122 | blit (scanner_image, gfx_screen, 0, 0, GFX_X_OFFSET, 385+GFX_Y_OFFSET, scanner_image->w, scanner_image->h); |
123 | gfx_draw_line (0, 0, 0, 384); |
124 | gfx_draw_line (0, 0, 511, 0); |
125 | gfx_draw_line (511, 0, 511, 384); |
126 | |
127 | /* Install a timer to regulate the speed of the game... */ |
128 | |
129 | LOCK_VARIABLE(frame_count); |
130 | LOCK_FUNCTION(frame_timer); |
131 | frame_count = 0; |
132 | install_int (frame_timer, speed_cap); |
133 | |
134 | return 0; |
135 | } |
136 | |
137 | |
138 | void gfx_graphics_shutdown (void) |
139 | { |
140 | destroy_bitmap(scanner_image); |
141 | destroy_bitmap(gfx_screen); |
142 | unload_datafile(datafile); |
143 | } |
144 | |
145 | |
146 | /* |
147 | * Blit the back buffer to the screen. |
148 | */ |
149 | |
150 | void gfx_update_screen (void) |
151 | { |
152 | while (frame_count < 1) |
153 | rest (10); |
154 | frame_count = 0; |
155 | |
156 | acquire_screen(); |
157 | blit (gfx_screen, screen, GFX_X_OFFSET, GFX_Y_OFFSET, GFX_X_OFFSET, GFX_Y_OFFSET, 512, 512); |
158 | release_screen(); |
159 | } |
160 | |
161 | |
162 | void gfx_acquire_screen (void) |
163 | { |
164 | acquire_bitmap (gfx_screen); |
165 | } |
166 | |
167 | |
168 | void gfx_release_screen (void) |
169 | { |
170 | release_bitmap(gfx_screen); |
171 | } |
172 | |
173 | void gfx_fast_plot_pixel (int x, int y, int col) |
174 | { |
175 | // _putpixel(gfx_screen, x, y, col); |
176 | gfx_screen->line[y][x] = col; |
177 | } |
178 | |
179 | |
180 | void gfx_plot_pixel (int x, int y, int col) |
181 | { |
182 | putpixel (gfx_screen, x + GFX_X_OFFSET, y + GFX_Y_OFFSET, col); |
183 | } |
184 | |
185 | |
186 | void gfx_draw_filled_circle (int cx, int cy, int radius, int circle_colour) |
187 | { |
188 | circlefill (gfx_screen, cx + GFX_X_OFFSET, cy + GFX_Y_OFFSET, radius, circle_colour); |
189 | } |
190 | |
191 | |
192 | #define AA_BITS 3 |
193 | #define AA_AND 7 |
194 | #define AA_BASE 235 |
195 | |
196 | #define trunc(x) ((x) & ~65535) |
197 | #define frac(x) ((x) & 65535) |
198 | #define invfrac(x) (65535-frac(x)) |
199 | #define plot(x,y,c) putpixel(gfx_screen, (x), (y), (c)+AA_BASE) |
200 | |
201 | /* |
202 | * Draw anti-aliased wireframe circle. |
203 | * By T.Harte. |
204 | */ |
205 | |
206 | void gfx_draw_aa_circle(int cx, int cy, int radius) |
207 | { |
208 | int x,y; |
209 | int s; |
210 | int sx, sy; |
211 | |
212 | cx += GFX_X_OFFSET; |
213 | cy += GFX_Y_OFFSET; |
214 | |
215 | radius >>= (16 - AA_BITS); |
216 | |
217 | x = radius; |
218 | s = -radius; |
219 | y = 0; |
220 | |
221 | while (y <= x) |
222 | { |
223 | //wide pixels |
224 | sx = cx + (x >> AA_BITS); sy = cy + (y >> AA_BITS); |
225 | |
226 | plot(sx, sy, AA_AND - (x&AA_AND)); |
227 | plot(sx + 1, sy, x&AA_AND); |
228 | |
229 | sy = cy - (y >> AA_BITS); |
230 | |
231 | plot(sx, sy, AA_AND - (x&AA_AND)); |
232 | plot(sx + 1, sy, x&AA_AND); |
233 | |
234 | sx = cx - (x >> AA_BITS); |
235 | |
236 | plot(sx, sy, AA_AND - (x&AA_AND)); |
237 | plot(sx - 1, sy, x&AA_AND); |
238 | |
239 | sy = cy + (y >> AA_BITS); |
240 | |
241 | plot(sx, sy, AA_AND - (x&AA_AND)); |
242 | plot(sx - 1, sy, x&AA_AND); |
243 | |
244 | //tall pixels |
245 | sx = cx + (y >> AA_BITS); sy = cy + (x >> AA_BITS); |
246 | |
247 | plot(sx, sy, AA_AND - (x&AA_AND)); |
248 | plot(sx, sy + 1, x&AA_AND); |
249 | |
250 | sy = cy - (x >> AA_BITS); |
251 | |
252 | plot(sx, sy, AA_AND - (x&AA_AND)); |
253 | plot(sx, sy - 1, x&AA_AND); |
254 | |
255 | sx = cx - (y >> AA_BITS); |
256 | |
257 | plot(sx, sy, AA_AND - (x&AA_AND)); |
258 | plot(sx, sy - 1, x&AA_AND); |
259 | |
260 | sy = cy + (x >> AA_BITS); |
261 | |
262 | plot(sx, sy, AA_AND - (x&AA_AND)); |
263 | plot(sx, sy + 1, x&AA_AND); |
264 | |
265 | s += AA_AND+1 + (y << (AA_BITS+1)) + ((1 << (AA_BITS+2))-2); |
266 | y += AA_AND+1; |
267 | |
268 | while(s >= 0) |
269 | { |
270 | s -= (x << 1) + 2; |
271 | x --; |
272 | } |
273 | } |
274 | } |
275 | |
276 | |
277 | /* |
278 | * Draw anti-aliased line. |
279 | * By T.Harte. |
280 | */ |
281 | |
282 | void gfx_draw_aa_line (int x1, int y1, int x2, int y2) |
283 | { |
284 | fixed grad, xd, yd; |
285 | fixed xgap, ygap, xend, yend, xf, yf; |
286 | fixed brightness1, brightness2, swap; |
287 | |
288 | int x, y, ix1, ix2, iy1, iy2; |
289 | |
290 | x1 += itofix(GFX_X_OFFSET); |
291 | x2 += itofix(GFX_X_OFFSET); |
292 | y1 += itofix(GFX_Y_OFFSET); |
293 | y2 += itofix(GFX_Y_OFFSET); |
294 | |
295 | xd = x2 - x1; |
296 | yd = y2 - y1; |
297 | |
298 | if (abs(xd) > abs(yd)) |
299 | { |
300 | if(x1 > x2) |
301 | { |
302 | swap = x1; x1 = x2; x2 = swap; |
303 | swap = y1; y1 = y2; y2 = swap; |
304 | xd = -xd; |
305 | yd = -yd; |
306 | } |
307 | |
308 | grad = fdiv(yd, xd); |
309 | |
310 | //end point 1 |
311 | |
312 | xend = trunc(x1 + 32768); |
313 | yend = y1 + fmul(grad, xend-x1); |
314 | |
315 | xgap = invfrac(x1+32768); |
316 | |
317 | ix1 = xend >> 16; |
318 | iy1 = yend >> 16; |
319 | |
320 | brightness1 = fmul(invfrac(yend), xgap); |
321 | brightness2 = fmul(frac(yend), xgap); |
322 | |
323 | plot(ix1, iy1, brightness1 >> (16-AA_BITS)); |
324 | plot(ix1, iy1+1, brightness2 >> (16-AA_BITS)); |
325 | |
326 | yf = yend+grad; |
327 | |
328 | //end point 2; |
329 | |
330 | xend = trunc(x2 + 32768); |
331 | yend = y2 + fmul(grad, xend-x2); |
332 | |
333 | xgap = invfrac(x2 - 32768); |
334 | |
335 | ix2 = xend >> 16; |
336 | iy2 = yend >> 16; |
337 | |
338 | brightness1 = fmul(invfrac(yend), xgap); |
339 | brightness2 = fmul(frac(yend), xgap); |
340 | |
341 | plot(ix2, iy2, brightness1 >> (16-AA_BITS)); |
342 | plot(ix2, iy2+1, brightness2 >> (16-AA_BITS)); |
343 | |
344 | for(x = ix1+1; x <= ix2-1; x++) |
345 | { |
346 | brightness1 = invfrac(yf); |
347 | brightness2 = frac(yf); |
348 | |
349 | plot(x, (yf >> 16), brightness1 >> (16-AA_BITS)); |
350 | plot(x, 1+(yf >> 16), brightness2 >> (16-AA_BITS)); |
351 | |
352 | yf += grad; |
353 | } |
354 | } |
355 | else |
356 | { |
357 | if(y1 > y2) |
358 | { |
359 | swap = x1; x1 = x2; x2 = swap; |
360 | swap = y1; y1 = y2; y2 = swap; |
361 | xd = -xd; |
362 | yd = -yd; |
363 | } |
364 | |
365 | grad = fdiv(xd, yd); |
366 | |
367 | //end point 1 |
368 | |
369 | yend = trunc(y1 + 32768); |
370 | xend = x1 + fmul(grad, yend-y1); |
371 | |
372 | ygap = invfrac(y1+32768); |
373 | |
374 | iy1 = yend >> 16; |
375 | ix1 = xend >> 16; |
376 | |
377 | brightness1 = fmul(invfrac(xend), ygap); |
378 | brightness2 = fmul(frac(xend), ygap); |
379 | |
380 | plot(ix1, iy1, brightness1 >> (16-AA_BITS)); |
381 | plot(ix1+1, iy1, brightness2 >> (16-AA_BITS)); |
382 | |
383 | xf = xend+grad; |
384 | |
385 | //end point 2; |
386 | |
387 | yend = trunc(y2 + 32768); |
388 | xend = x2 + fmul(grad, yend-y2); |
389 | |
390 | ygap = invfrac(y2 - 32768); |
391 | |
392 | ix2 = xend >> 16; |
393 | iy2 = yend >> 16; |
394 | |
395 | brightness1 = fmul(invfrac(xend), ygap); |
396 | brightness2 = fmul(frac(xend), ygap); |
397 | |
398 | plot(ix2, iy2, brightness1 >> (16-AA_BITS)); |
399 | plot(ix2+1, iy2, brightness2 >> (16-AA_BITS)); |
400 | |
401 | for(y = iy1+1; y <= iy2-1; y++) |
402 | { |
403 | brightness1 = invfrac(xf); |
404 | brightness2 = frac(xf); |
405 | |
406 | plot((xf >> 16), y, brightness1 >> (16-AA_BITS)); |
407 | plot(1+(xf >> 16), y, brightness2 >> (16-AA_BITS)); |
408 | |
409 | xf += grad; |
410 | } |
411 | } |
412 | } |
413 | |
414 | #undef trunc |
415 | #undef frac |
416 | #undef invfrac |
417 | #undef plot |
418 | |
419 | #undef AA_BITS |
420 | #undef AA_AND |
421 | #undef AA_BASE |
422 | |
423 | |
424 | |
425 | void gfx_draw_circle (int cx, int cy, int radius, int circle_colour) |
426 | { |
427 | if (anti_alias_gfx && (circle_colour == GFX_COL_WHITE)) |
428 | gfx_draw_aa_circle (cx, cy, itofix(radius)); |
429 | else |
430 | circle (gfx_screen, cx + GFX_X_OFFSET, cy + GFX_Y_OFFSET, radius, circle_colour); |
431 | } |
432 | |
433 | |
434 | |
435 | void gfx_draw_line (int x1, int y1, int x2, int y2) |
436 | { |
437 | if (y1 == y2) |
438 | { |
439 | hline (gfx_screen, x1 + GFX_X_OFFSET, y1 + GFX_Y_OFFSET, x2 + GFX_X_OFFSET, GFX_COL_WHITE); |
440 | return; |
441 | } |
442 | |
443 | if (x1 == x2) |
444 | { |
445 | vline (gfx_screen, x1 + GFX_X_OFFSET, y1 + GFX_Y_OFFSET, y2 + GFX_Y_OFFSET, GFX_COL_WHITE); |
446 | return; |
447 | } |
448 | |
449 | if (anti_alias_gfx) |
450 | gfx_draw_aa_line (itofix(x1), itofix(y1), itofix(x2), itofix(y2)); |
451 | else |
452 | line (gfx_screen, x1 + GFX_X_OFFSET, y1 + GFX_Y_OFFSET, x2 + GFX_X_OFFSET, y2 + GFX_Y_OFFSET, GFX_COL_WHITE); |
453 | } |
454 | |
455 | |
456 | |
457 | void gfx_draw_colour_line (int x1, int y1, int x2, int y2, int line_colour) |
458 | { |
459 | if (y1 == y2) |
460 | { |
461 | hline (gfx_screen, x1 + GFX_X_OFFSET, y1 + GFX_Y_OFFSET, x2 + GFX_X_OFFSET, line_colour); |
462 | return; |
463 | } |
464 | |
465 | if (x1 == x2) |
466 | { |
467 | vline (gfx_screen, x1 + GFX_X_OFFSET, y1 + GFX_Y_OFFSET, y2 + GFX_Y_OFFSET, line_colour); |
468 | return; |
469 | } |
470 | |
471 | if (anti_alias_gfx && (line_colour == GFX_COL_WHITE)) |
472 | gfx_draw_aa_line (itofix(x1), itofix(y1), itofix(x2), itofix(y2)); |
473 | else |
474 | line (gfx_screen, x1 + GFX_X_OFFSET, y1 + GFX_Y_OFFSET, x2 + GFX_X_OFFSET, y2 + GFX_Y_OFFSET, line_colour); |
475 | } |
476 | |
477 | |
478 | |
479 | void gfx_draw_triangle (int x1, int y1, int x2, int y2, int x3, int y3, int col) |
480 | { |
481 | triangle (gfx_screen, x1 + GFX_X_OFFSET, y1 + GFX_Y_OFFSET, x2 + GFX_X_OFFSET, y2 + GFX_Y_OFFSET, |
482 | x3 + GFX_X_OFFSET, y3 + GFX_Y_OFFSET, col); |
483 | } |
484 | |
485 | |
486 | |
487 | void gfx_display_text (int x, int y, char *txt) |
488 | { |
489 | text_mode (-1); |
490 | 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); |
491 | } |
492 | |
493 | |
494 | void gfx_display_colour_text (int x, int y, char *txt, int col) |
495 | { |
496 | text_mode (-1); |
497 | textout (gfx_screen, datafile[ELITE_1].dat, txt, (x / (2 / GFX_SCALE)) + GFX_X_OFFSET, (y / (2 / GFX_SCALE)) + GFX_Y_OFFSET, col); |
498 | } |
499 | |
500 | |
501 | |
502 | void gfx_display_centre_text (int y, char *str, int psize, int col) |
503 | { |
504 | int txt_size; |
505 | int txt_colour; |
506 | |
507 | if (psize == 140) |
508 | { |
509 | txt_size = ELITE_2; |
510 | txt_colour = -1; |
511 | } |
512 | else |
513 | { |
514 | txt_size = ELITE_1; |
515 | txt_colour = col; |
516 | } |
517 | |
518 | text_mode (-1); |
519 | textout_centre (gfx_screen, datafile[txt_size].dat, str, (128 * GFX_SCALE) + GFX_X_OFFSET, (y / (2 / GFX_SCALE)) + GFX_Y_OFFSET, txt_colour); |
520 | } |
521 | |
522 | |
523 | void gfx_clear_display (void) |
524 | { |
525 | rectfill (gfx_screen, GFX_X_OFFSET + 1, GFX_Y_OFFSET + 1, 510 + GFX_X_OFFSET, 383 + GFX_Y_OFFSET, GFX_COL_BLACK); |
526 | } |
527 | |
528 | void gfx_clear_text_area (void) |
529 | { |
530 | rectfill (gfx_screen, GFX_X_OFFSET + 1, GFX_Y_OFFSET + 340, 510 + GFX_X_OFFSET, 383 + GFX_Y_OFFSET, GFX_COL_BLACK); |
531 | } |
532 | |
533 | |
534 | void gfx_clear_area (int tx, int ty, int bx, int by) |
535 | { |
536 | rectfill (gfx_screen, tx + GFX_X_OFFSET, ty + GFX_Y_OFFSET, |
537 | bx + GFX_X_OFFSET, by + GFX_Y_OFFSET, GFX_COL_BLACK); |
538 | } |
539 | |
540 | void gfx_draw_rectangle (int tx, int ty, int bx, int by, int col) |
541 | { |
542 | rectfill (gfx_screen, tx + GFX_X_OFFSET, ty + GFX_Y_OFFSET, |
543 | bx + GFX_X_OFFSET, by + GFX_Y_OFFSET, col); |
544 | } |
545 | |
546 | |
547 | void gfx_display_pretty_text (int tx, int ty, int bx, int by, char *txt) |
548 | { |
549 | char strbuf[100]; |
550 | char *str; |
551 | char *bptr; |
552 | int len; |
553 | int pos; |
554 | int maxlen; |
555 | |
556 | maxlen = (bx - tx) / 8; |
557 | |
558 | str = txt; |
559 | len = strlen(txt); |
560 | |
561 | while (len > 0) |
562 | { |
563 | pos = maxlen; |
564 | if (pos > len) |
565 | pos = len; |
566 | |
567 | while ((str[pos] != ' ') && (str[pos] != ',') && |
568 | (str[pos] != '.') && (str[pos] != '\0')) |
569 | { |
570 | pos--; |
571 | } |
572 | |
573 | len = len - pos - 1; |
574 | |
575 | for (bptr = strbuf; pos >= 0; pos--) |
576 | *bptr++ = *str++; |
577 | |
578 | *bptr = '\0'; |
579 | |
580 | text_mode (-1); |
581 | textout (gfx_screen, datafile[ELITE_1].dat, strbuf, tx + GFX_X_OFFSET, ty + GFX_Y_OFFSET, GFX_COL_WHITE); |
582 | ty += (8 * GFX_SCALE); |
583 | } |
584 | } |
585 | |
586 | |
587 | void gfx_draw_scanner (void) |
588 | { |
1a8abebd |
589 | set_clip(gfx_screen, GFX_X_OFFSET, 385 + GFX_Y_OFFSET, |
590 | GFX_X_OFFSET + scanner_image->w, |
591 | GFX_Y_OFFSET + scanner_image->h + 385); |
592 | blit (scanner_image, gfx_screen, 0, 0, GFX_X_OFFSET, |
593 | 385+GFX_Y_OFFSET, scanner_image->w, scanner_image->h); |
84bbd123 |
594 | } |
595 | |
596 | void gfx_set_clip_region (int tx, int ty, int bx, int by) |
597 | { |
598 | set_clip (gfx_screen, tx + GFX_X_OFFSET, ty + GFX_Y_OFFSET, bx + GFX_X_OFFSET, by + GFX_Y_OFFSET); |
599 | } |
600 | |
601 | |
602 | void gfx_start_render (void) |
603 | { |
604 | start_poly = 0; |
605 | total_polys = 0; |
606 | } |
607 | |
608 | |
609 | void gfx_render_polygon (int num_points, int *point_list, int face_colour, int zavg) |
610 | { |
611 | int i; |
612 | int x; |
613 | int nx; |
614 | |
615 | if (total_polys == MAX_POLYS) |
616 | return; |
617 | |
618 | x = total_polys; |
619 | total_polys++; |
620 | |
621 | poly_chain[x].no_points = num_points; |
622 | poly_chain[x].face_colour = face_colour; |
623 | poly_chain[x].z = zavg; |
624 | poly_chain[x].next = -1; |
625 | |
626 | for (i = 0; i < 16; i++) |
627 | poly_chain[x].point_list[i] = point_list[i]; |
628 | |
629 | if (x == 0) |
630 | return; |
631 | |
632 | if (zavg > poly_chain[start_poly].z) |
633 | { |
634 | poly_chain[x].next = start_poly; |
635 | start_poly = x; |
636 | return; |
637 | } |
638 | |
639 | for (i = start_poly; poly_chain[i].next != -1; i = poly_chain[i].next) |
640 | { |
641 | nx = poly_chain[i].next; |
642 | |
643 | if (zavg > poly_chain[nx].z) |
644 | { |
645 | poly_chain[i].next = x; |
646 | poly_chain[x].next = nx; |
647 | return; |
648 | } |
649 | } |
650 | |
651 | poly_chain[i].next = x; |
652 | } |
653 | |
654 | |
655 | void gfx_render_line (int x1, int y1, int x2, int y2, int dist, int col) |
656 | { |
657 | int point_list[4]; |
658 | |
659 | point_list[0] = x1; |
660 | point_list[1] = y1; |
661 | point_list[2] = x2; |
662 | point_list[3] = y2; |
663 | |
664 | gfx_render_polygon (2, point_list, col, dist); |
665 | } |
666 | |
667 | |
668 | void gfx_finish_render (void) |
669 | { |
670 | int num_points; |
671 | int *pl; |
672 | int i; |
673 | int col; |
674 | |
675 | if (total_polys == 0) |
676 | return; |
677 | |
678 | for (i = start_poly; i != -1; i = poly_chain[i].next) |
679 | { |
680 | num_points = poly_chain[i].no_points; |
681 | pl = poly_chain[i].point_list; |
682 | col = poly_chain[i].face_colour; |
683 | |
684 | if (num_points == 2) |
685 | { |
686 | gfx_draw_colour_line (pl[0], pl[1], pl[2], pl[3], col); |
687 | continue; |
688 | } |
689 | |
690 | gfx_polygon (num_points, pl, col); |
691 | }; |
692 | } |
693 | |
694 | |
695 | void gfx_polygon (int num_points, int *poly_list, int face_colour) |
696 | { |
697 | int i; |
698 | int x,y; |
699 | |
700 | x = 0; |
701 | y = 1; |
702 | for (i = 0; i < num_points; i++) |
703 | { |
704 | poly_list[x] += GFX_X_OFFSET; |
705 | poly_list[y] += GFX_Y_OFFSET; |
706 | x += 2; |
707 | y += 2; |
708 | } |
709 | |
710 | polygon (gfx_screen, num_points, poly_list, face_colour); |
711 | } |
712 | |
713 | |
714 | void gfx_draw_sprite (int sprite_no, int x, int y) |
715 | { |
716 | BITMAP *sprite_bmp; |
717 | |
718 | switch (sprite_no) |
719 | { |
720 | case IMG_GREEN_DOT: |
721 | sprite_bmp = datafile[GRNDOT].dat; |
722 | break; |
723 | |
724 | case IMG_RED_DOT: |
725 | sprite_bmp = datafile[REDDOT].dat; |
726 | break; |
727 | |
728 | case IMG_BIG_S: |
729 | sprite_bmp = datafile[SAFE].dat; |
730 | break; |
731 | |
732 | case IMG_ELITE_TXT: |
733 | sprite_bmp = datafile[ELITETXT].dat; |
734 | break; |
735 | |
736 | case IMG_BIG_E: |
737 | sprite_bmp = datafile[ECM].dat; |
738 | break; |
739 | |
740 | case IMG_BLAKE: |
741 | sprite_bmp = datafile[BLAKE].dat; |
742 | break; |
743 | |
744 | case IMG_MISSILE_GREEN: |
745 | sprite_bmp = datafile[MISSILE_G].dat; |
746 | break; |
747 | |
748 | case IMG_MISSILE_YELLOW: |
749 | sprite_bmp = datafile[MISSILE_Y].dat; |
750 | break; |
751 | |
752 | case IMG_MISSILE_RED: |
753 | sprite_bmp = datafile[MISSILE_R].dat; |
754 | break; |
755 | |
756 | default: |
757 | return; |
758 | } |
759 | |
760 | if (x == -1) |
761 | x = ((256 * GFX_SCALE) - sprite_bmp->w) / 2; |
762 | |
763 | draw_sprite (gfx_screen, sprite_bmp, x + GFX_X_OFFSET, y + GFX_Y_OFFSET); |
764 | } |
765 | |
766 | |
767 | int gfx_request_file (char *title, char *path, char *ext) |
768 | { |
769 | int okay; |
770 | |
771 | show_mouse (screen); |
772 | okay = file_select (title, path, ext); |
773 | show_mouse (NULL); |
774 | |
775 | return okay; |
776 | } |
777 | |