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enable swapping for 8 bit on big endian machines
[micropolis] / src / sim / w_x.c
1 /* w_x.c: X Window System support
2 *
3 * Micropolis, Unix Version. This game was released for the Unix platform
4 * in or about 1990 and has been modified for inclusion in the One Laptop
5 * Per Child program. Copyright (C) 1989 - 2007 Electronic Arts Inc. If
6 * you need assistance with this program, you may contact:
7 * http://wiki.laptop.org/go/Micropolis or email micropolis@laptop.org.
8 *
9 * This program is free software: you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation, either version 3 of the License, or (at
12 * your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful, but
15 * WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * General Public License for more details. You should have received a
18 * copy of the GNU General Public License along with this program. If
19 * not, see <http://www.gnu.org/licenses/>.
20 *
21 * ADDITIONAL TERMS per GNU GPL Section 7
22 *
23 * No trademark or publicity rights are granted. This license does NOT
24 * give you any right, title or interest in the trademark SimCity or any
25 * other Electronic Arts trademark. You may not distribute any
26 * modification of this program using the trademark SimCity or claim any
27 * affliation or association with Electronic Arts Inc. or its employees.
28 *
29 * Any propagation or conveyance of this program must include this
30 * copyright notice and these terms.
31 *
32 * If you convey this program (or any modifications of it) and assume
33 * contractual liability for the program to recipients of it, you agree
34 * to indemnify Electronic Arts for any liability that those contractual
35 * assumptions impose on Electronic Arts.
36 *
37 * You may not misrepresent the origins of this program; modified
38 * versions of the program must be marked as such and not identified as
39 * the original program.
40 *
41 * This disclaimer supplements the one included in the General Public
42 * License. TO THE FULLEST EXTENT PERMISSIBLE UNDER APPLICABLE LAW, THIS
43 * PROGRAM IS PROVIDED TO YOU "AS IS," WITH ALL FAULTS, WITHOUT WARRANTY
44 * OF ANY KIND, AND YOUR USE IS AT YOUR SOLE RISK. THE ENTIRE RISK OF
45 * SATISFACTORY QUALITY AND PERFORMANCE RESIDES WITH YOU. ELECTRONIC ARTS
46 * DISCLAIMS ANY AND ALL EXPRESS, IMPLIED OR STATUTORY WARRANTIES,
47 * INCLUDING IMPLIED WARRANTIES OF MERCHANTABILITY, SATISFACTORY QUALITY,
48 * FITNESS FOR A PARTICULAR PURPOSE, NONINFRINGEMENT OF THIRD PARTY
49 * RIGHTS, AND WARRANTIES (IF ANY) ARISING FROM A COURSE OF DEALING,
50 * USAGE, OR TRADE PRACTICE. ELECTRONIC ARTS DOES NOT WARRANT AGAINST
51 * INTERFERENCE WITH YOUR ENJOYMENT OF THE PROGRAM; THAT THE PROGRAM WILL
52 * MEET YOUR REQUIREMENTS; THAT OPERATION OF THE PROGRAM WILL BE
53 * UNINTERRUPTED OR ERROR-FREE, OR THAT THE PROGRAM WILL BE COMPATIBLE
54 * WITH THIRD PARTY SOFTWARE OR THAT ANY ERRORS IN THE PROGRAM WILL BE
55 * CORRECTED. NO ORAL OR WRITTEN ADVICE PROVIDED BY ELECTRONIC ARTS OR
56 * ANY AUTHORIZED REPRESENTATIVE SHALL CREATE A WARRANTY. SOME
57 * JURISDICTIONS DO NOT ALLOW THE EXCLUSION OF OR LIMITATIONS ON IMPLIED
58 * WARRANTIES OR THE LIMITATIONS ON THE APPLICABLE STATUTORY RIGHTS OF A
59 * CONSUMER, SO SOME OR ALL OF THE ABOVE EXCLUSIONS AND LIMITATIONS MAY
60 * NOT APPLY TO YOU.
61 */
62 #include "sim.h"
63
64
65 struct XDisplay *XDisplays = NULL;
66 int DisplayCount = 0;
67 #ifdef IS_LINUX
68 int FlushStyle = 3;
69 #else
70 int FlushStyle = 4;
71 #endif
72 int GotXError;
73
74
75 unsigned char ColorIntensities[] = {
76 /* COLOR_WHITE */ 255,
77 /* COLOR_YELLOW */ 170,
78 /* COLOR_ORANGE */ 127,
79 /* COLOR_RED */ 85,
80 /* COLOR_DARKRED */ 63,
81 /* COLOR_DARKBLUE */ 76,
82 /* COLOR_LIGHTBLUE */ 144,
83 /* COLOR_BROWN */ 118,
84 /* COLOR_LIGHTGREEN */ 76,
85 /* COLOR_DARKGREEN */ 42,
86 /* COLOR_OLIVE */ 118,
87 /* COLOR_LIGHTBROWN */ 144,
88 /* COLOR_LIGHTGRAY */ 191,
89 /* COLOR_MEDIUMGRAY */ 127,
90 /* COLOR_DARKGRAY */ 63,
91 /* COLOR_BLACK */ 0,
92 };
93
94
95 ViewToTileCoords(SimView *view, int x, int y, int *outx, int *outy)
96 {
97 x = (view->pan_x - ((view->w_width >>1) - x)) >>4;
98 y = (view->pan_y - ((view->w_height >>1) - y)) >>4;
99
100 if (x < 0) x = 0;
101 if (x >= WORLD_X) x = WORLD_X - 1;
102 if (y < 0) y = 0;
103 if (y >= WORLD_Y) y = WORLD_Y - 1;
104
105 if (x < view->tile_x)
106 x = view->tile_x;
107 if (x >= view->tile_x + view->tile_width)
108 x = view->tile_x + view->tile_width - 1;
109 if (y < view->tile_y)
110 y = view->tile_y;
111 if (y >= view->tile_y + view->tile_height)
112 y = view->tile_y + view->tile_height - 1;
113
114 if (view->tool_x_const != -1)
115 x = view->tool_x_const;
116 if (view->tool_y_const != -1)
117 y = view->tool_y_const;
118
119 *outx = x; *outy = y;
120 }
121
122
123 ViewToPixelCoords(SimView *view, int x, int y, int *outx, int *outy)
124 {
125 x = view->pan_x - ((view->w_width >>1) - x);
126 y = view->pan_y - ((view->w_height >>1) - y);
127
128 if (x < 0) x = 0;
129 if (x >= (WORLD_X <<4)) x = (WORLD_X <<4) - 1;
130 if (y < 0) y = 0;
131 if (y >= (WORLD_Y <<4)) y = (WORLD_Y <<4) - 1;
132
133 if (x < (view->tile_x <<4))
134 x = (view->tile_x <<4);
135 if (x >= ((view->tile_x + view->tile_width) <<4))
136 x = ((view->tile_x + view->tile_width) <<4) - 1;
137 if (y < (view->tile_y <<4))
138 y = (view->tile_y <<4);
139 if (y >= ((view->tile_y + view->tile_height) <<4))
140 y = ((view->tile_y + view->tile_height) <<4) - 1;
141
142 if (view->tool_x_const != -1)
143 x = (view->tool_x_const <<4) + 8;
144 if (view->tool_y_const != -1)
145 y = (view->tool_y_const <<4) + 8;
146
147 *outx = x; *outy = y;
148 }
149
150
151 UpdateFlush()
152 {
153 struct XDisplay *xd;
154
155 if (sim_skips > 0) {
156 if (sim_skip > 0) {
157 sim_skip--;
158 return;
159 }
160 sim_skip = sim_skips;
161 }
162
163 switch (FlushStyle) {
164
165 case 0:
166 break;
167
168 case 1:
169 for (xd = XDisplays; xd != NULL; xd = xd->next)
170 XFlush(xd->dpy);
171 break;
172
173 case 2:
174 for (xd = XDisplays; xd != NULL; xd = xd->next)
175 XSync(xd->dpy, False);
176 break;
177
178 case 3:
179 if (XDisplays && XDisplays->next) {
180 for (xd = XDisplays; xd != NULL; xd = xd->next) {
181 XFlush(xd->dpy);
182 }
183 }
184 for (xd = XDisplays; xd != NULL; xd = xd->next) {
185 XSync(xd->dpy, False);
186 }
187 break;
188
189 case 4:
190 for (xd = XDisplays; xd != NULL; xd = xd->next) {
191 #ifndef IS_LINUX
192 /* XXX TODO: figure this out for linux and new x libs */
193 if ((xd->request != xd->dpy->request) ||
194 (xd->last_request_read != xd->dpy->last_request_read)) {
195 XSync(xd->dpy, False);
196 xd->request = xd->dpy->request;
197 xd->last_request_read = xd->dpy->last_request_read;
198 }
199 #endif
200 }
201 break;
202
203 }
204 }
205
206
207 int
208 CatchXError(Display *dpy, XErrorEvent *err)
209 {
210 GotXError = 1;
211 #if 0
212 printf("GOT X ERROR code %d request code %d %d\n",
213 err->error_code, err->request_code, err->minor_code);
214 #endif
215 return (0);
216 }
217
218
219 DoStopMicropolis()
220 {
221 (void)XSetErrorHandler(CatchXError);
222
223 StopToolkit();
224
225 if (sim) {
226 while (sim->editor != NULL) {
227 DestroyView(sim->editor);
228 }
229
230 while (sim->map != NULL) {
231 DestroyView(sim->map);
232 }
233
234 while (sim->graph != NULL) {
235 DestroyGraph(sim->graph);
236 }
237
238 #ifdef CAM
239 while (sim->scam != NULL) {
240 DestroyCam(sim->scam);
241 }
242 #endif
243 }
244 }
245
246
247 DoTimeoutListen()
248 {
249 while (Tk_DoOneEvent(TK_DONT_WAIT)) ;
250 }
251
252
253 Sim *
254 MakeNewSim()
255 {
256 Sim *sim;
257
258 sim = (Sim *)ckalloc(sizeof(Sim));
259 sim->editors = 0; sim->editor = NULL;
260 sim->maps = 0; sim->map = NULL;
261 sim->graphs = 0; sim->graph = NULL;
262 sim->sprites = 0; sim->sprite = NULL;
263 #ifdef CAM
264 sim->scams = 0; sim->scam = NULL;
265 #endif
266 sim->overlay = NULL;
267
268 return (sim);
269 }
270
271
272 XDisplay *
273 FindXDisplay(Tk_Window tkwin)
274 {
275 XDisplay *xd;
276 int d = 8;
277 unsigned long valuemask = 0;
278 XGCValues values;
279 XColor rgb, *color;
280 Display *dpy = Tk_Display(tkwin);
281 Screen *screen = Tk_Screen(tkwin);
282 #ifdef IS_LINUX
283 char *display = ":0"; /* XXX TODO: fix this for new x libs */
284 #else
285 char *display = dpy->display_name;
286 #endif
287
288 for (xd = XDisplays;
289 xd && (xd->screen != screen);
290 xd = xd->next) ;
291
292 if (xd != NULL) {
293 return (xd);
294 } else {
295 xd = (struct XDisplay *)ckalloc(sizeof (struct XDisplay));
296
297 xd->references = 0;
298 xd->dpy = dpy;
299 xd->display = (char *)ckalloc(strlen(display) + 1);
300 xd->tkDisplay = ((TkWindow *)tkwin)->dispPtr;
301 strcpy(xd->display, display);
302 xd->screen = screen;
303 xd->root = RootWindowOfScreen(xd->screen);
304
305 xd->visual = Tk_DefaultVisual(xd->screen);
306 xd->depth = Tk_DefaultDepth(xd->screen);
307 xd->colormap = Tk_DefaultColormap(xd->screen);
308
309 xd->color = (xd->depth != 1);
310
311 xd->pixels = (int *)ckalloc(16 * sizeof(int));
312 if (xd->color) { /* Color screen */
313 int GotColor = 1;
314
315 #define GETCOLOR(i, name) \
316 if (!GotColor) { \
317 xd->pixels[i] = Rand16() & 255; \
318 } else { \
319 if ((color = Tk_GetColor(tk_mainInterp, tkwin, \
320 None, name)) == NULL) { \
321 xd->pixels[i] = Rand16() & 255; \
322 GotColor = 0; \
323 } else { \
324 switch (xd->depth) { \
325 case 8: \
326 xd->pixels[i] = \
327 color->pixel; \
328 break; \
329 case 15: \
330 xd->pixels[i] = \
331 (((color->red >> (8 + 3)) & 0x1f) << (5 + 5)) | \
332 (((color->green >> (8 + 2)) & 0x1f) << (5)) | \
333 (((color->blue >> (8 + 3)) & 0x1f) << (0)); \
334 break; \
335 case 16: \
336 xd->pixels[i] = \
337 (((color->red >> (8 + 3)) & 0x1f) << (6 + 5)) | \
338 (((color->green >> (8 + 2)) & 0x3f) << (5)) | \
339 (((color->blue >> (8 + 3)) & 0x1f) << (0)); \
340 break; \
341 case 24: \
342 xd->pixels[i] = \
343 ((color->red & 0xff) << 16) | \
344 ((color->green & 0xff) << 8) | \
345 ((color->blue & 0xff) << 0); \
346 break; \
347 case 32: \
348 xd->pixels[i] = \
349 ((color->red & 0xff) << 16) | \
350 ((color->green & 0xff) << 8) | \
351 ((color->blue & 0xff) << 0); \
352 break; \
353 } \
354 } \
355 }
356
357 if ((xd->depth == 8) &&
358 (Tk_DefaultColormap(xd->screen) ==
359 DefaultColormapOfScreen(xd->screen))) {
360 xd->pixels[COLOR_WHITE] = WhitePixelOfScreen(xd->screen);
361 xd->pixels[COLOR_BLACK] = BlackPixelOfScreen(xd->screen);
362 } else {
363 GETCOLOR(COLOR_WHITE, "#ffffff");
364 GETCOLOR(COLOR_BLACK, "#000000");
365 }
366
367 GETCOLOR(COLOR_YELLOW, "#ffff00");
368 GETCOLOR(COLOR_ORANGE, "#ff7f00");
369 GETCOLOR(COLOR_RED, "#ff0000");
370 GETCOLOR(COLOR_DARKRED, "#bf0000");
371 GETCOLOR(COLOR_DARKBLUE, "#0000e6");
372 GETCOLOR(COLOR_LIGHTBLUE, "#6666e6");
373 GETCOLOR(COLOR_BROWN, "#cc4c4c");
374 GETCOLOR(COLOR_LIGHTGREEN, "#00e600");
375 GETCOLOR(COLOR_DARKGREEN, "#007f00");
376 GETCOLOR(COLOR_OLIVE, "#997f4c");
377 GETCOLOR(COLOR_LIGHTBROWN, "#cc7f66");
378 GETCOLOR(COLOR_LIGHTGRAY, "#bfbfbf");
379 GETCOLOR(COLOR_MEDIUMGRAY, "#7f7f7f");
380 GETCOLOR(COLOR_DARKGRAY, "#3f3f3f");
381
382 if (!GotColor) {
383 fprintf(stderr,
384 "Oh, dear. There don't seem to be enough free colors on X display \"%s\".\n",
385 xd->display);
386 fprintf(stderr,
387 "Micropolis will try to run anyway, but might look pretty weird!\n");
388 }
389 } else { /* Black and white screen */
390 int white = WhitePixelOfScreen(xd->screen);
391 int black = BlackPixelOfScreen(xd->screen);
392
393 xd->pixels[COLOR_WHITE] = white;
394 xd->pixels[COLOR_BLACK] = black;
395
396 xd->pixels[COLOR_YELLOW] = white;
397 xd->pixels[COLOR_ORANGE] = white;
398 xd->pixels[COLOR_RED] = white;
399 xd->pixels[COLOR_DARKRED] = black;
400 xd->pixels[COLOR_DARKBLUE] = black;
401 xd->pixels[COLOR_LIGHTBLUE] = white;
402 xd->pixels[COLOR_BROWN] = black;
403 xd->pixels[COLOR_LIGHTGREEN] = white;
404 xd->pixels[COLOR_DARKGREEN] = black;
405 xd->pixels[COLOR_OLIVE] = black;
406 xd->pixels[COLOR_LIGHTBROWN] = white;
407 xd->pixels[COLOR_LIGHTGRAY] = white;
408 xd->pixels[COLOR_MEDIUMGRAY] = white;
409 xd->pixels[COLOR_DARKGRAY] = black;
410 }
411
412 xd->gc = Tk_DefaultGC(xd->screen);
413 XSetForeground(xd->dpy, xd->gc, xd->pixels[COLOR_BLACK]);
414 XSetBackground(xd->dpy, xd->gc, xd->pixels[COLOR_WHITE]);
415 XSetLineAttributes(xd->dpy, xd->gc,
416 1, LineSolid, CapButt, JoinMiter);
417 XSetGraphicsExposures(xd->dpy, xd->gc, False);
418
419 #ifndef MSDOS
420 { int major, minor, event, error, pixmaps;
421 if (WireMode ||
422 (XQueryExtension(xd->dpy, "MIT-SHM", /* Jeez! */
423 &major, &event, &error) != True) ||
424 (XShmQueryVersion(xd->dpy,
425 &major, &minor, &pixmaps) != True)) {
426 fprintf(stderr,
427 "Darn, X display \"%s\" doesn't support the shared memory extension.\n",
428 xd->display);
429 xd->shared = 0;
430 } else {
431 if (!pixmaps) {
432 fprintf(stderr,
433 "Darn, X display \"%s\" claims to support the shared memory extension,\n",
434 xd->display);
435 fprintf(stderr,
436 "but is too lame to support shared memory pixmaps, so Micropolis will run slower.\n");
437 fprintf(stderr,
438 "Please complain to your X server vendor, %s\n",
439 XServerVendor(xd->dpy));
440 xd->shared = -1;
441 } else {
442 fprintf(stderr,
443 "Cool, I found the shared memory extension!\n");
444 fprintf(stderr,
445 "Disabled SHM, because it is currently broken!\n");
446 xd->shared = 0;
447 }
448 }
449 }
450 #else
451 xd->shared = 0;
452 #endif
453
454 xd->request = -1;
455 xd->last_request_read = -1;
456 xd->big_tile_pixmap = None;
457 xd->objects = NULL;
458 xd->overlay_gc = NULL;
459 xd->gray25_stipple = None;
460 xd->gray50_stipple = None;
461 xd->gray75_stipple = None;
462 xd->vert_stipple = None;
463 xd->horiz_stipple = None;
464 xd->diag_stipple = None;
465
466 xd->big_tile_image = xd->small_tile_image = NULL;
467
468 xd->next = XDisplays; XDisplays = xd;
469 }
470
471 return (xd);
472 }
473
474
475 IncRefDisplay(XDisplay *xd)
476 {
477 xd->references++;
478 }
479
480
481 DecRefDisplay(XDisplay *xd)
482 {
483 if ((--xd->references) == 0) {
484 /* I'd blow it away, but tk may still be using the display */
485 }
486 }
487
488
489 SimView *
490 InitNewView(SimView *view, char *title, int class, int w, int h)
491 {
492 int type, i;
493 int test = 1;
494 int d = 8;
495 unsigned long valuemask = 0;
496 char *t;
497 struct XDisplay *xd;
498 XGCValues values;
499 XColor rgb, *color;
500
501 t = (char *)ckalloc(strlen(title) + 1);
502 strcpy(t, title);
503
504 view->next = NULL;
505 view->title = t;
506 view->type = -1;
507 view->class = class;
508 view->bigtiles = view->smalltiles = NULL;
509 view->pixels = NULL;
510 view->line_bytes = 0;
511 view->line_bytes8 = 0;
512 view->pixel_bytes = 0;
513 view->depth = 0;
514 view->data = NULL;
515 view->data8 = NULL;
516 view->visible = 0;
517 view->invalid = 0;
518 view->skips = view->skip = 0;
519 view->update = 0;
520 view->map_state = ALMAP;
521 view->show_editors = 1;
522 view->tool_showing = 0;
523 view->tool_mode = 0;
524 view->tool_x = view->tool_y = 0;
525 view->tool_x_const = view->tool_y_const = -1;
526 view->tool_state = dozeState;
527 view->tool_state_save = -1;
528 view->super_user = 0;
529 view->show_me = 1;
530 view->dynamic_filter = 0;
531 view->auto_scroll_token = 0;
532 view->tool_event_time = 0;
533 view->tool_last_event_time = 0;
534 view->w_x = view->w_y = 0;
535 view->w_width = view->w_height = 16;
536 view->m_width = view->m_height = 0;
537 view->i_width = w; view->i_height = h;
538 view->pan_x = view->pan_y = 0;
539 view->tile_x = view->tile_y = 0;
540 view->tile_width = view->tile_height = 0;
541 view->screen_x = view->screen_y = 0;
542 view->screen_width = view->screen_height = 0;
543 view->last_x = view->last_y = view->last_button = 0;
544 view->track_info = NULL;
545 view->message_var = NULL;
546
547 /* This stuff was initialized in our caller (SimViewCmd) */
548 /* view->tkwin = NULL; */
549 /* view->interp = NULL; */
550 /* view->flags = 0; */
551
552 view->x = NULL;
553 view->shminfo = NULL;
554 view->tiles = NULL;
555 view->other_tiles = NULL;
556 view->image = NULL;
557 view->other_image = NULL;
558 view->other_data = NULL;
559 view->pixmap = None;
560 view->pixmap2 = None;
561 view->overlay_pixmap = None;
562 view->overlay_valid = 0;
563 view->fontPtr = NULL;
564 view->updates = 0;
565 view->update_real = view->update_user = view->update_system = 0.0;
566 view->update_context = 0;
567 view->auto_goto = 0;
568 view->auto_going = 0;
569 view->auto_x_goal = view->auto_x_goal = 0;
570 view->auto_speed = 75;
571 view->follow = NULL;
572 view->sound = 1;
573 view->width = 0; view->height = 0;
574 view->show_overlay = 1;
575 view->overlay_mode = 0;
576
577 view->x = FindXDisplay(view->tkwin);
578 IncRefDisplay(view->x);
579
580 /* view->x->shared is 1 if the shared memory extension is present and
581 supports shared memory pixmaps, and -1 if it is present but doesn't. */
582 if (view->x->shared != 1) {
583 view->type = X_Wire_View;
584 } else {
585 view->type = X_Mem_View;
586 }
587
588 view->x->needs_swap = !(*(unsigned char*) (&test));
589
590
591 GetPixmaps(view->x);
592 view->pixels = view->x->pixels;
593
594 if (w == EDITOR_W) w = 256; /* XXX */
595 if (h == EDITOR_H) h = 256; /* XXX */
596
597 view->pan_x = w / 2; view->pan_y = h / 2;
598 DoResizeView(view, w, h);
599
600 GetViewTiles(view);
601
602 return (view);
603 }
604
605
606 DestroyView(SimView *view)
607 {
608 SimView **vp;
609
610 CancelRedrawView(view);
611
612 for (vp = ((view->class == Editor_Class) ?
613 (&sim->editor) : (&sim->map));
614 (*vp) != NULL;
615 vp = &((*vp)->next)) {
616 if ((*vp) == view) {
617 (*vp) = view->next;
618 if (view->class == Editor_Class)
619 sim->editors--;
620 else
621 sim->maps--;
622
623 break;
624 }
625 }
626
627 if (view->title != NULL) {
628 ckfree (view->title);
629 view->title = NULL;
630 }
631
632 if (view->pixmap != None) {
633 XFreePixmap(view->x->dpy, view->pixmap);
634 view->pixmap = None;
635 }
636
637 if (view->pixmap2 != None) {
638 XFreePixmap(view->x->dpy, view->pixmap2);
639 view->pixmap2 = None;
640 }
641
642 if (view->overlay_pixmap != None) {
643 XFreePixmap(view->x->dpy, view->overlay_pixmap);
644 view->overlay_pixmap = None;
645 }
646
647 if (view->auto_scroll_token) {
648 Tk_DeleteTimerHandler(view->auto_scroll_token);
649 view->auto_scroll_token = 0;
650 }
651
652 #ifndef MSDOS
653 if (view->shminfo) {
654 XShmDetach(view->x->dpy, view->shminfo);
655 shmdt(view->shminfo->shmaddr);
656 shmctl(view->shminfo->shmid, IPC_RMID, 0);
657 ckfree(view->shminfo);
658 view->shminfo = NULL;
659 if (view->image) {
660 view->image->data = NULL;
661 view->data = NULL;
662 XDestroyImage(view->image);
663 view->image = NULL;
664 }
665 } else {
666 #endif
667 if (view->image) {
668 if (view->image->data) {
669 ckfree(view->image->data);
670 view->image->data = NULL;
671 }
672 view->data = NULL;
673 XDestroyImage(view->image);
674 view->image = NULL;
675 }
676 #ifndef MSDOS
677 }
678 #endif
679
680 if (view->other_image) {
681 if (view->other_image->data) {
682 ckfree(view->other_image->data);
683 view->other_image->data = NULL;
684 }
685 view->other_data = NULL;
686 XDestroyImage(view->other_image);
687 view->other_image = NULL;
688 }
689
690 if (view->tiles)
691 FreeTiles(view);
692
693 DecRefDisplay(view->x);
694
695 ckfree((char *) view);
696 }
697
698
699 unsigned char *
700 AllocPixels(int len, unsigned char pixel)
701 {
702 int i;
703 unsigned char *data, *cp;
704
705 cp = data = (unsigned char *)ckalloc(len);
706 for (i = len; i > 0; i--) {
707 *(cp++) = pixel;
708 }
709
710 return (data);
711 }
712
713
714 DoResizeView(SimView *view, int w, int h)
715 {
716 int resize = 0;
717
718 view->w_width = w;
719 view->w_height = h;
720
721 if (view->class == Map_Class) { /* Map_Class */
722 view->m_width = w;
723 view->m_height = h;
724
725 if (view->pixmap2 == None) {
726
727 view->pixmap2 = XCreatePixmap(view->x->dpy, view->x->root,
728 w, h, view->x->depth);
729 if (view->pixmap2 == None) {
730 fprintf(stderr,
731 "Sorry, Micropolis can't create a pixmap on X display \"%s\"!\n",
732 view->x->display);
733 sim_exit(1); // Just sets tkMustExit and ExitReturn
734 return;
735 }
736 }
737
738 } else { /* Editor_Class */
739
740 if ((w = (w + 31) & (~15)) > view->m_width)
741 view->m_width = w, resize++;
742 if ((h = (h + 31) & (~15)) > view->m_height)
743 view->m_height = h, resize++;
744
745 if (resize || (view->pixmap2 == None)) {
746 if (view->pixmap2 != None) {
747 XFreePixmap(view->x->dpy, view->pixmap2);
748 view->pixmap2 = None;
749 }
750 view->pixmap2 = XCreatePixmap(view->x->dpy, view->x->root,
751 view->m_width, view->m_height,
752 view->x->depth);
753 if (view->pixmap2 == None) {
754 fprintf(stderr,
755 "Sorry, Micropolis couldn't create a pixmap on X display \"%s\"!\n",
756 view->x->display);
757 sim_exit(1); // Just sets tkMustExit and ExitReturn
758 return;
759 }
760 }
761
762 if (resize || (view->overlay_pixmap == None)) {
763 view->overlay_mode = 0;
764 if (view->overlay_pixmap != None) {
765 XFreePixmap(view->x->dpy, view->overlay_pixmap);
766 view->overlay_pixmap = None;
767 }
768 view->overlay_pixmap = XCreatePixmap(view->x->dpy, view->x->root,
769 view->m_width, view->m_height,
770 1);
771 if (view->overlay_pixmap == None) {
772 fprintf(stderr,
773 "Sorry, Micropolis couldn't create another pixmap on X display \"%s\".\n",
774 view->x->display);
775 sim_exit(1); // Just sets tkMustExit and ExitReturn
776 return;
777 }
778 if (view->x->overlay_gc == NULL) {
779 unsigned long valuemask = 0;
780 XGCValues values;
781
782 view->x->overlay_gc =
783 XCreateGC(view->x->dpy, view->overlay_pixmap, valuemask, &values);
784 XSetForeground(view->x->dpy, view->x->overlay_gc, 0);
785 XSetBackground(view->x->dpy, view->x->overlay_gc, 1);
786 XSetLineAttributes(view->x->dpy, view->x->overlay_gc,
787 1, LineSolid, CapButt, JoinMiter);
788 XSetGraphicsExposures(view->x->dpy, view->x->overlay_gc, False);
789 }
790 }
791
792 }
793
794 #ifndef MSDOS
795 if (view->type != X_Mem_View) {
796 goto SPRING_FORWARD;
797 }
798
799 if (resize || (view->image == NULL)) {
800 if (view->shminfo && view->image) {
801 if (view->pixmap != None) {
802 XFreePixmap(view->x->dpy, view->pixmap);
803 view->pixmap = None;
804 }
805 XShmDetach(view->x->dpy, view->shminfo);
806 shmdt(view->shminfo->shmaddr);
807 shmctl(view->shminfo->shmid, IPC_RMID, 0);
808 view->image->data = NULL;
809 if (view->data == view->data8)
810 view->data8 = NULL;
811 view->data = NULL;
812 XDestroyImage(view->image);
813 view->image = NULL;
814 }
815
816 #if 0
817 /* XShmPixmapFormat is documented but does not exist !!! */
818 if (XShmPixmapFormat(view->x->dpy) != ZPixmap) {
819 fprintf(stderr,
820 "Darn, display \"%s\" has the wrong shared memory format.\n",
821 view->x->display);
822 goto FALL_BACK;
823 }
824 #endif
825
826 if (!view->shminfo) {
827 view->shminfo = (XShmSegmentInfo *)ckalloc(sizeof (XShmSegmentInfo));
828 }
829
830 view->image =
831 XShmCreateImage(view->x->dpy, view->x->visual, view->x->depth,
832 view->x->color ? ZPixmap : XYBitmap,
833 NULL, view->shminfo,
834 view->m_width, view->m_height);
835
836 view->line_bytes = view->image->bytes_per_line;
837
838 switch (view->x->depth) {
839
840 case 1:
841 view->pixel_bytes = 0;
842 view->depth = 1;
843 break;
844
845 case 8:
846 view->pixel_bytes = 1;
847 view->depth = 8;
848 break;
849
850 case 15:
851 view->pixel_bytes = 2;
852 view->depth = 15;
853 break;
854
855 case 16:
856 view->pixel_bytes = 2;
857 view->depth = 16;
858 break;
859
860 case 24:
861 /* XXX: TODO: 24 and 32 bit support */
862 view->pixel_bytes = 4;
863 //view->pixel_bytes = 3;
864 view->depth = 24;
865 break;
866
867 case 32:
868 /* XXX: TODO: 24 and 32 bit support */
869 view->pixel_bytes = 4;
870 view->depth = 32;
871 break;
872
873 default:
874 view->pixel_bytes = 0;
875 view->depth = 0;
876 break;
877
878 } // switch
879
880 view->shminfo->shmid = shmget(IPC_PRIVATE,
881 (view->line_bytes *
882 view->m_height),
883 (IPC_CREAT | 0777));
884 if (view->shminfo->shmid < 0) {
885 perror("shmget");
886 fprintf(stderr,
887 "Darn, Micropolis can't share memory with X display \"%s\".\n",
888 view->x->display);
889 goto FALL_BACK;
890 }
891
892 view->data = (unsigned char *)shmat(view->shminfo->shmid, 0, 0);
893 if ((int)view->data == -1) {
894 perror("shmat");
895 fprintf(stderr,
896 "Darn, Micropolis can't find any memory to share with display \"%s\".\n",
897 view->x->display);
898 goto FALL_BACK;
899 }
900
901 view->image->data = (char *)view->data;
902 view->shminfo->shmaddr = (char *)view->data;
903 view->shminfo->readOnly = False;
904
905 { int (*old)();
906 int result;
907 int attached = 0;
908 GotXError = 0;
909 old = XSetErrorHandler(CatchXError);
910
911 result =
912 XShmAttach(view->x->dpy, view->shminfo);
913 if (result == 0) {
914 fprintf(stderr,
915 "Darn, the X display \"%s\" can't access Micropolis's shared memory.\n",
916 view->x->display);
917 GotXError = 1;
918 }
919
920 XSync(view->x->dpy, False);
921
922 if (!GotXError) {
923 attached = 1;
924 view->pixmap = XShmCreatePixmap(view->x->dpy, view->x->root,
925 view->data, view->shminfo,
926 view->m_width, view->m_height,
927 view->x->depth);
928 XSync(view->x->dpy, False);
929
930 if (GotXError ||
931 (view->pixmap == None)) {
932 fprintf(stderr,
933 "Darn, Micropolis couldn't get a shared memory pixmap on X display \"%s\".\n",
934 view->x->display);
935 GotXError = 1;
936 }
937 }
938
939 XSetErrorHandler(old);
940
941 if (GotXError) {
942 view->pixmap = None;
943 if (attached) {
944 XShmDetach(view->x->dpy, view->shminfo);
945 } // if
946 result = shmdt(view->shminfo->shmaddr);
947 result = shmctl(view->shminfo->shmid, IPC_RMID, 0);
948 ckfree(view->shminfo);
949 view->shminfo = NULL;
950 if (view->image) {
951 view->image->data = NULL;
952 view->data = NULL;
953 XDestroyImage(view->image);
954 view->image = NULL;
955 }
956 goto FALL_BACK;
957 }
958
959 if (view->x->color) {
960 XSetForeground(view->x->dpy, view->x->gc,
961 view->pixels[COLOR_LIGHTBROWN]);
962 } else {
963 XSetForeground(view->x->dpy, view->x->gc,
964 view->pixels[COLOR_WHITE]);
965 }
966
967 XFillRectangle(view->x->dpy, view->pixmap, view->x->gc,
968 0, 0, view->m_width, view->m_height);
969 }
970 }
971
972 goto FINISH;
973
974 FALL_BACK:
975
976 fprintf(stderr,
977 "Falling back to the X network protocol on display \"%s\"...\n",
978 view->x->display);
979 #endif
980
981 view->x->shared = 0;
982 view->type = X_Wire_View;
983 if (view->pixmap != None) {
984 XFreePixmap(view->x->dpy, view->pixmap);
985 view->pixmap = None;
986 }
987 #ifndef MSDOS
988 if (view->shminfo) {
989 if (view->shminfo->shmid >= 0) {
990 if (view->shminfo->shmaddr) {
991 shmdt(view->shminfo->shmaddr);
992 }
993 shmctl(view->shminfo->shmid, IPC_RMID, 0);
994 }
995 ckfree((char *)view->shminfo);
996 view->shminfo = NULL;
997 }
998 #endif
999 if (view->image) {
1000 view->image->data = NULL;
1001 XDestroyImage(view->image);
1002 view->image = NULL;
1003 }
1004 view->data = NULL;
1005 view->line_bytes = 0;
1006 view->pixel_bytes = 0;
1007 view->depth = 0;
1008
1009 SPRING_FORWARD:
1010
1011 if (resize || (view->pixmap == None)) {
1012 if (view->pixmap != None) {
1013 XFreePixmap(view->x->dpy, view->pixmap);
1014 view->pixmap = None;
1015 }
1016 view->pixmap = XCreatePixmap(view->x->dpy, view->x->root,
1017 view->m_width, view->m_height,
1018 view->x->depth);
1019 if (view->pixmap == None) {
1020 fprintf(stderr,
1021 "Sorry, Micropolis can't create pixmap on X display \"%s\".\n",
1022 view->x->display);
1023 sim_exit(1); // Just sets tkMustExit and ExitReturn
1024 return;
1025 }
1026 if (view->x->color) {
1027 XSetForeground(view->x->dpy, view->x->gc,
1028 view->pixels[COLOR_LIGHTBROWN]);
1029 } else {
1030 XSetForeground(view->x->dpy, view->x->gc,
1031 view->pixels[COLOR_WHITE]);
1032 }
1033 XFillRectangle(view->x->dpy, view->pixmap, view->x->gc,
1034 0, 0, view->m_width, view->m_height);
1035 }
1036
1037 FINISH:
1038
1039 if (view->class == Editor_Class) {
1040
1041 AllocTiles(view);
1042 DoAdjustPan(view);
1043
1044 } else if (view->class == Map_Class) {
1045
1046 if (view->type == X_Mem_View) { /* Memory Map */
1047
1048 if (view->x->color) {
1049
1050 /* Color, Shared Memory */
1051
1052 view->data8 = view->data;
1053 view->line_bytes8 = view->line_bytes; /* XXX: ??? */
1054
1055 switch (view->x->depth) {
1056
1057 case 8:
1058 view->pixel_bytes = 1;
1059 view->depth = 8;
1060 break;
1061
1062 case 15:
1063 view->pixel_bytes = 2;
1064 view->depth = 15;
1065 break;
1066
1067 case 16:
1068 view->pixel_bytes = 2;
1069 view->depth = 16;
1070 break;
1071
1072 case 24:
1073 /* XXX: TODO: 24 and 32 bit support */
1074 view->pixel_bytes = 4;
1075 //view->pixel_bytes = 3;
1076 view->depth = 24;
1077 break;
1078
1079 case 32:
1080 /* XXX: TODO: 24 and 32 bit support */
1081 view->pixel_bytes = 4;
1082 view->depth = 32;
1083 break;
1084
1085 default:
1086 view->pixel_bytes = 0;
1087 view->depth = 0;
1088 break;
1089
1090 } // switch
1091
1092 } else {
1093
1094 /* Black and White, Shared Memory */
1095
1096 if (view->other_image != NULL) {
1097 XDestroyImage(view->other_image);
1098 }
1099
1100 view->line_bytes8 = view->m_width; /* XXX: fix depth */
1101 view->pixel_bytes = 0;
1102 view->depth = 1;
1103
1104 view->other_data = view->data8 =
1105 AllocPixels(view->m_height * view->line_bytes8, /* XXX: fix depth */
1106 view->pixels[COLOR_WHITE]);
1107 view->other_image =
1108 XCreateImage(view->x->dpy, view->x->visual, 8, /* XXX: fix depth */
1109 ZPixmap, 0, (char *)view->other_data,
1110 view->m_width, view->m_height,
1111 8, view->line_bytes8); /* XXX: fix depth */
1112 }
1113
1114 } else { /* Wire Map */
1115 int bitmap_pad;
1116 int bitmap_depth;
1117
1118 if (view->image != NULL) {
1119 XDestroyImage(view->image);
1120 view->image = NULL;
1121 }
1122
1123 if (view->other_image != NULL) {
1124 XDestroyImage(view->other_image);
1125 view->other_image = NULL;
1126 }
1127
1128 if (view->x->color) {
1129
1130 /* Color, Wire */
1131
1132 switch (view->x->depth) {
1133
1134 case 8:
1135 view->pixel_bytes = 1;
1136 view->depth = 8;
1137 bitmap_pad = 8;
1138 bitmap_depth = 8;
1139 view->line_bytes8 =
1140 ((view->m_width * view->pixel_bytes) + 3) & (~3);
1141 break;
1142
1143 case 15:
1144 view->pixel_bytes = 2;
1145 view->depth = 15;
1146 bitmap_pad = 16;
1147 bitmap_depth = 15;
1148 view->line_bytes8 =
1149 ((view->m_width * view->pixel_bytes) + 3) & (~3);
1150 break;
1151
1152 case 16:
1153 view->pixel_bytes = 2;
1154 view->depth = 16;
1155 bitmap_pad = 16;
1156 bitmap_depth = 16;
1157 view->line_bytes8 =
1158 ((view->m_width * view->pixel_bytes) + 3) & (~3);
1159 break;
1160
1161 case 24:
1162 view->pixel_bytes = 4;
1163 //view->pixel_bytes = 3;
1164 view->depth = 24;
1165 bitmap_depth = 24;
1166 bitmap_pad = 32;
1167 view->line_bytes8 =
1168 ((view->m_width * 4) + 3) & (~3);
1169 break;
1170
1171 case 32:
1172 view->pixel_bytes = 4;
1173 view->depth = 32;
1174 bitmap_pad = 32;
1175 bitmap_depth = 32;
1176 view->line_bytes8 =
1177 ((view->m_width * 4) + 3) & (~3);
1178 break;
1179
1180 default:
1181 assert(0); /* Unknown depth */
1182 break;
1183
1184 } // switch
1185
1186 view->line_bytes =
1187 view->line_bytes8;
1188
1189 } else {
1190
1191 /* Black and White, Wire */
1192
1193 view->pixel_bytes = 0;
1194 view->depth = 1;
1195 view->line_bytes8 =
1196 (view->m_width + 3) & (~3); /* XXX: handle depth */
1197 view->line_bytes =
1198 (view->m_width + 7) >>3;
1199 bitmap_pad = 8;
1200 bitmap_depth = 8;
1201
1202 }
1203
1204 view->data =
1205 AllocPixels(view->m_height * view->line_bytes, 0);
1206 view->image =
1207 XCreateImage(view->x->dpy, view->x->visual,
1208 bitmap_depth,
1209 view->x->color ? ZPixmap : XYBitmap,
1210 0, (char *)view->data,
1211 view->m_width, view->m_height,
1212 bitmap_pad,
1213 view->line_bytes);
1214
1215 view->other_data =
1216 AllocPixels(view->m_height * view->line_bytes8, 0);
1217 view->other_image =
1218 XCreateImage(view->x->dpy, view->x->visual,
1219 bitmap_depth,
1220 ZPixmap,
1221 0, (char *)view->other_data,
1222 view->m_width, view->m_height,
1223 bitmap_pad,
1224 view->line_bytes);
1225
1226 if (view->x->color) {
1227 view->data8 = view->data;
1228 } else {
1229 view->data8 = view->other_data;
1230 }
1231 }
1232 }
1233 }
1234
1235
1236 DoPanBy(struct SimView *view, int dx, int dy)
1237 {
1238 DoPanTo(view, view->pan_x + dx, view->pan_y + dy);
1239 }
1240
1241
1242 DoPanTo(struct SimView *view, int x, int y)
1243 {
1244 if (view->class != Editor_Class) {
1245 return;
1246 }
1247
1248 if (x < 0) x = 0;
1249 if (y < 0) y = 0;
1250 if (x > view->i_width) x = view->i_width - 1;
1251 if (y > view->i_height) y = view->i_height - 1;
1252 if ((view->pan_x != x) ||
1253 (view->pan_y != y)) {
1254 view->pan_x = x;
1255 view->pan_y = y;
1256 DoAdjustPan(view);
1257 }
1258 }
1259
1260 /* #define DEBUG_PAN */
1261
1262 DoAdjustPan(struct SimView *view)
1263 {
1264 int ww2 = view->w_width >>1, wh2 = view->w_height >>1;
1265 int px = view->pan_x, py = view->pan_y;
1266 int last_tile_x = view->tile_x, last_tile_y = view->tile_y;
1267 int last_tile_width = view->tile_width, last_tile_height = view->tile_height;
1268 int total_width = view->m_width >>4, total_height = view->m_height >>4;
1269 //fprintf(stderr, "DoAdjustPan\n");
1270
1271 #ifdef DEBUG_PAN
1272 printf("AdjustPan window %d %d ww2 %d wh2 %d pan %d %d\n",
1273 view->w_width, view->w_height, ww2, wh2, px, py);
1274 printf(" last tile %d %d %d %d\n",
1275 last_tile_x, last_tile_y, last_tile_width, last_tile_height);
1276 #endif
1277
1278 if ((view->tile_x = ((px - ww2) >>4)) < 0)
1279 view->tile_x = 0;
1280 if ((view->tile_y = ((py - wh2) >>4)) < 0)
1281 view->tile_y = 0;
1282
1283 #ifdef DEBUG_PAN
1284 printf(" now tile %d %d\n", view->tile_x, view->tile_y);
1285 #endif
1286
1287 view->tile_width = ((15 + px + ww2) >>4);
1288 view->tile_height = ((15 + py + wh2) >>4);
1289
1290 #ifdef DEBUG_PAN
1291 printf(" outer tile %d %d\n", view->tile_width, view->tile_height);
1292 #endif
1293
1294 if (view->tile_width > (view->i_width >>4))
1295 view->tile_width = (view->i_width >>4);
1296 view->tile_width -= view->tile_x;
1297 if (view->tile_height > (view->i_height >>4))
1298 view->tile_height = (view->i_height >>4);
1299 view->tile_height -= view->tile_y;
1300
1301 #ifdef DEBUG_PAN
1302 printf(" tile size %d %d\n", view->tile_width, view->tile_height);
1303 #endif
1304
1305 if (view->tile_width > (view->m_width >>4))
1306 view->tile_width = (view->m_width >>4);
1307 if (view->tile_height > (view->m_height >>4))
1308 view->tile_height = (view->m_height >>4);
1309
1310 #ifdef DEBUG_PAN
1311 printf(" clipped size %d %d\n", view->tile_width, view->tile_height);
1312 printf(" maximum size %d %d\n", view->m_width >>4, view->m_height >>4);
1313 #endif
1314
1315 view->screen_x = (ww2 - px) + (view->tile_x <<4);
1316 view->screen_y = (wh2 - py) + (view->tile_y <<4);
1317 view->screen_width = (view->tile_width <<4);
1318 view->screen_height = (view->tile_height <<4);
1319
1320 #ifdef DEBUG_PAN
1321 printf(" screen %d %d %d %d\n",
1322 view->screen_x, view->screen_y,
1323 view->screen_width, view->screen_height);
1324 #endif
1325
1326 view->overlay_mode = 0;
1327 // view->skip = 0;
1328 view->invalid = 1;
1329 if (SimSpeed == 0) {
1330 EventuallyRedrawView(view);
1331 }
1332 /* InvalidateEditors(); */
1333 if (view->show_me) {
1334 RedrawMaps();
1335 }
1336 /* FixMicropolisTimer(); */
1337
1338 { int dx = last_tile_x - view->tile_x,
1339 dy = last_tile_y - view->tile_y;
1340 short **want = view->other_tiles,
1341 **have = view->tiles;
1342
1343 #ifdef DEBUG_PAN
1344 printf("scrolling %d %d\n", dx, dy);
1345 #endif
1346
1347 if ((dx != 0) || (dy != 0)) {
1348 int row, col, x, y,
1349 width = view->tile_width,
1350 height = view->tile_height;
1351
1352 for (col = 0; col < width; col++)
1353 memcpy(want[col], have[col], (height * sizeof(short)));
1354
1355 for (col = 0; col < total_width; col++) {
1356 x = col - dx;
1357 for (row = 0; row < total_height; row++) {
1358 y = row - dy;
1359 if ((x >= 0) && (x < width) &&
1360 (y >= 0) && (y < height)) {
1361 have[col][row] = want[x][y];
1362 } else {
1363 have[col][row] = -1;
1364 }
1365 }
1366 }
1367
1368 XCopyArea(view->x->dpy, view->pixmap, view->pixmap, view->x->gc,
1369 0, 0, view->tile_width <<4, view->tile_height <<4,
1370 dx <<4, dy <<4);
1371
1372 if (view->type == X_Mem_View) {
1373 XSync(view->x->dpy, False);
1374 }
1375 }
1376 }
1377 }
1378
1379
1380 AllocTiles(SimView *view)
1381 {
1382 int row, col;
1383 short **have, **want;
1384 int w = view->m_width / 16, h = view->m_height / 16;
1385 int n = (w + 1) * sizeof (short *);
1386
1387 if (view->tiles)
1388 FreeTiles(view);
1389
1390 have = view->tiles =
1391 (short **)ckalloc(n);
1392
1393 want = view->other_tiles =
1394 (short **)ckalloc(n);
1395
1396 have[w] = want[w] = NULL;
1397
1398 n = h * sizeof(short);
1399 for (col = 0; col < w; col++) {
1400
1401 have[col] = (short *)ckalloc(n);
1402 want[col] = (short *)ckalloc(n);
1403 for (row = 0; row < h; row++) {
1404 have[col][row] = -1;
1405 want[col][row] = -1;
1406 }
1407 }
1408 }
1409
1410
1411 FreeTiles(SimView *view)
1412 {
1413 int col;
1414
1415 for (col = 0; view->tiles[col] != NULL; col++) {
1416 ckfree ((char *)view->tiles[col]);
1417 ckfree ((char *)view->other_tiles[col]);
1418 }
1419 ckfree ((char *)view->tiles);
1420 view->tiles = NULL;
1421 ckfree ((char *)view->other_tiles);
1422 view->other_tiles = NULL;
1423 }
1424
1425
1426 #define POINT_BATCH 32
1427
1428 Ink *OldInk = NULL;
1429
1430
1431 /* XXX: todo: ink locking so someone doesn't erase ink that's being drawn */
1432
1433 Ink *
1434 NewInk()
1435 {
1436 Ink *ink;
1437
1438 if (OldInk) {
1439 ink = OldInk;
1440 OldInk = OldInk->next;
1441 } else {
1442 ink = (Ink *)ckalloc(sizeof(Ink));
1443 ink->maxlength = POINT_BATCH;
1444 ink->points = (XPoint *)ckalloc(POINT_BATCH * sizeof(XPoint));
1445 }
1446 ink->length = 0;
1447 ink->color = COLOR_WHITE;
1448 ink->next = NULL;
1449 ink->left = ink->right = ink->top = ink->bottom =
1450 ink->last_x = ink->last_y = -1;
1451 return (ink);
1452 }
1453
1454
1455 FreeInk(Ink *ink)
1456 {
1457 ink->next = OldInk;
1458 OldInk = ink;
1459 }
1460
1461
1462 StartInk(Ink *ink, int x, int y)
1463 {
1464 ink->length = 1;
1465 ink->left = ink->right = ink->last_x = ink->points[0].x = x;
1466 ink->top = ink->bottom = ink->last_y = ink->points[0].y = y;
1467 }
1468
1469
1470 AddInk(Ink *ink, int x, int y)
1471 {
1472 int dx = x - ink->last_x;
1473 int dy = y - ink->last_y;
1474
1475 if ((dx != 0) || (dy != 0)) {
1476 /*
1477 if (ink->length > 1) {
1478 if ((dx == 0) &&
1479 (ink->points[ink->length - 1].x == 0) &&
1480 ((ink->points[ink->length - 1].y < 0) ?
1481 (dy < 0) : (dy > 0))) {
1482 ink->points[ink->length - 1].y += dy;
1483 goto ADJUST;
1484 } else if ((dy == 0) &&
1485 (ink->points[ink->length - 1].y == 0) &&
1486 ((ink->points[ink->length - 1].x < 0) ?
1487 (dx < 0) : (dx > 0))) {
1488 ink->points[ink->length - 1].x += dx;
1489 goto ADJUST;
1490 }
1491 }
1492 */
1493
1494 if (ink->length >= ink->maxlength) {
1495 ink->maxlength += POINT_BATCH;
1496 ink->points = (XPoint *)realloc((void *)ink->points,
1497 ink->maxlength * sizeof(XPoint));
1498 }
1499 ink->points[ink->length].x = dx;
1500 ink->points[ink->length].y = dy;
1501 ink->length++;
1502
1503 ADJUST:
1504 if (x < ink->left)
1505 ink->left = x;
1506 if (x > ink->right)
1507 ink->right = x;
1508 if (y < ink->top)
1509 ink->top = y;
1510 if (y > ink->bottom)
1511 ink->bottom = y;
1512
1513 { int left, right, top, bottom;
1514 SimView *view;
1515
1516 if (ink->last_x < x) { left = ink->last_x; right = x; }
1517 else { left = x; right = ink->last_x; }
1518 if (ink->last_y < y) { top = ink->last_y; bottom = y; }
1519 else { top = y; bottom = ink->last_y; }
1520
1521 left -= 5; right += 5; top -= 5; bottom += 5;
1522
1523 for (view = sim->editor; view != NULL; view = view->next) {
1524 int vleft, vtop;
1525
1526 if ((right >= (vleft = view->pan_x - (view->w_width / 2))) &&
1527 (left <= vleft + view->w_width) &&
1528 (bottom >= (vtop = view->pan_y - (view->w_height / 2))) &&
1529 (top <= vtop + view->w_height)) {
1530 /* XXX: do studly incremental update instead */
1531 view->overlay_mode = 0;
1532 EventuallyRedrawView(view);
1533 }
1534 }
1535 }
1536 ink->last_x = x; ink->last_y = y;
1537 }
1538 }
1539
1540
1541 EraseOverlay()
1542 {
1543 Ink *ink;
1544
1545 while (sim->overlay) {
1546 ink = sim->overlay;
1547 sim->overlay = ink->next;
1548 FreeInk(ink);
1549 }
1550 }
Micropolis
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