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[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 if ((ImageByteOrder(view->x->dpy) == MSBFirst) == !(*(unsigned char*) (&test)))
589 view->x->needs_swap = 0;
590 else
591 view->x->needs_swap = 1;
592
593
594 GetPixmaps(view->x);
595 view->pixels = view->x->pixels;
596
597 if (w == EDITOR_W) w = 256; /* XXX */
598 if (h == EDITOR_H) h = 256; /* XXX */
599
600 view->pan_x = w / 2; view->pan_y = h / 2;
601 DoResizeView(view, w, h);
602
603 GetViewTiles(view);
604
605 return (view);
606 }
607
608
609 DestroyView(SimView *view)
610 {
611 SimView **vp;
612
613 CancelRedrawView(view);
614
615 for (vp = ((view->class == Editor_Class) ?
616 (&sim->editor) : (&sim->map));
617 (*vp) != NULL;
618 vp = &((*vp)->next)) {
619 if ((*vp) == view) {
620 (*vp) = view->next;
621 if (view->class == Editor_Class)
622 sim->editors--;
623 else
624 sim->maps--;
625
626 break;
627 }
628 }
629
630 if (view->title != NULL) {
631 ckfree (view->title);
632 view->title = NULL;
633 }
634
635 if (view->pixmap != None) {
636 XFreePixmap(view->x->dpy, view->pixmap);
637 view->pixmap = None;
638 }
639
640 if (view->pixmap2 != None) {
641 XFreePixmap(view->x->dpy, view->pixmap2);
642 view->pixmap2 = None;
643 }
644
645 if (view->overlay_pixmap != None) {
646 XFreePixmap(view->x->dpy, view->overlay_pixmap);
647 view->overlay_pixmap = None;
648 }
649
650 if (view->auto_scroll_token) {
651 Tk_DeleteTimerHandler(view->auto_scroll_token);
652 view->auto_scroll_token = 0;
653 }
654
655 #ifndef MSDOS
656 if (view->shminfo) {
657 XShmDetach(view->x->dpy, view->shminfo);
658 shmdt(view->shminfo->shmaddr);
659 shmctl(view->shminfo->shmid, IPC_RMID, 0);
660 ckfree(view->shminfo);
661 view->shminfo = NULL;
662 if (view->image) {
663 view->image->data = NULL;
664 view->data = NULL;
665 XDestroyImage(view->image);
666 view->image = NULL;
667 }
668 } else {
669 #endif
670 if (view->image) {
671 if (view->image->data) {
672 ckfree(view->image->data);
673 view->image->data = NULL;
674 }
675 view->data = NULL;
676 XDestroyImage(view->image);
677 view->image = NULL;
678 }
679 #ifndef MSDOS
680 }
681 #endif
682
683 if (view->other_image) {
684 if (view->other_image->data) {
685 ckfree(view->other_image->data);
686 view->other_image->data = NULL;
687 }
688 view->other_data = NULL;
689 XDestroyImage(view->other_image);
690 view->other_image = NULL;
691 }
692
693 if (view->tiles)
694 FreeTiles(view);
695
696 DecRefDisplay(view->x);
697
698 ckfree((char *) view);
699 }
700
701
702 unsigned char *
703 AllocPixels(int len, unsigned char pixel)
704 {
705 int i;
706 unsigned char *data, *cp;
707
708 cp = data = (unsigned char *)ckalloc(len);
709 for (i = len; i > 0; i--) {
710 *(cp++) = pixel;
711 }
712
713 return (data);
714 }
715
716
717 DoResizeView(SimView *view, int w, int h)
718 {
719 int resize = 0;
720
721 view->w_width = w;
722 view->w_height = h;
723
724 if (view->class == Map_Class) { /* Map_Class */
725 view->m_width = w;
726 view->m_height = h;
727
728 if (view->pixmap2 == None) {
729
730 view->pixmap2 = XCreatePixmap(view->x->dpy, view->x->root,
731 w, h, view->x->depth);
732 if (view->pixmap2 == None) {
733 fprintf(stderr,
734 "Sorry, Micropolis can't create a pixmap on X display \"%s\"!\n",
735 view->x->display);
736 sim_exit(1); // Just sets tkMustExit and ExitReturn
737 return;
738 }
739 }
740
741 } else { /* Editor_Class */
742
743 if ((w = (w + 31) & (~15)) > view->m_width)
744 view->m_width = w, resize++;
745 if ((h = (h + 31) & (~15)) > view->m_height)
746 view->m_height = h, resize++;
747
748 if (resize || (view->pixmap2 == None)) {
749 if (view->pixmap2 != None) {
750 XFreePixmap(view->x->dpy, view->pixmap2);
751 view->pixmap2 = None;
752 }
753 view->pixmap2 = XCreatePixmap(view->x->dpy, view->x->root,
754 view->m_width, view->m_height,
755 view->x->depth);
756 if (view->pixmap2 == None) {
757 fprintf(stderr,
758 "Sorry, Micropolis couldn't create a pixmap on X display \"%s\"!\n",
759 view->x->display);
760 sim_exit(1); // Just sets tkMustExit and ExitReturn
761 return;
762 }
763 }
764
765 if (resize || (view->overlay_pixmap == None)) {
766 view->overlay_mode = 0;
767 if (view->overlay_pixmap != None) {
768 XFreePixmap(view->x->dpy, view->overlay_pixmap);
769 view->overlay_pixmap = None;
770 }
771 view->overlay_pixmap = XCreatePixmap(view->x->dpy, view->x->root,
772 view->m_width, view->m_height,
773 1);
774 if (view->overlay_pixmap == None) {
775 fprintf(stderr,
776 "Sorry, Micropolis couldn't create another pixmap on X display \"%s\".\n",
777 view->x->display);
778 sim_exit(1); // Just sets tkMustExit and ExitReturn
779 return;
780 }
781 if (view->x->overlay_gc == NULL) {
782 unsigned long valuemask = 0;
783 XGCValues values;
784
785 view->x->overlay_gc =
786 XCreateGC(view->x->dpy, view->overlay_pixmap, valuemask, &values);
787 XSetForeground(view->x->dpy, view->x->overlay_gc, 0);
788 XSetBackground(view->x->dpy, view->x->overlay_gc, 1);
789 XSetLineAttributes(view->x->dpy, view->x->overlay_gc,
790 1, LineSolid, CapButt, JoinMiter);
791 XSetGraphicsExposures(view->x->dpy, view->x->overlay_gc, False);
792 }
793 }
794
795 }
796
797 #ifndef MSDOS
798 if (view->type != X_Mem_View) {
799 goto SPRING_FORWARD;
800 }
801
802 if (resize || (view->image == NULL)) {
803 if (view->shminfo && view->image) {
804 if (view->pixmap != None) {
805 XFreePixmap(view->x->dpy, view->pixmap);
806 view->pixmap = None;
807 }
808 XShmDetach(view->x->dpy, view->shminfo);
809 shmdt(view->shminfo->shmaddr);
810 shmctl(view->shminfo->shmid, IPC_RMID, 0);
811 view->image->data = NULL;
812 if (view->data == view->data8)
813 view->data8 = NULL;
814 view->data = NULL;
815 XDestroyImage(view->image);
816 view->image = NULL;
817 }
818
819 #if 0
820 /* XShmPixmapFormat is documented but does not exist !!! */
821 if (XShmPixmapFormat(view->x->dpy) != ZPixmap) {
822 fprintf(stderr,
823 "Darn, display \"%s\" has the wrong shared memory format.\n",
824 view->x->display);
825 goto FALL_BACK;
826 }
827 #endif
828
829 if (!view->shminfo) {
830 view->shminfo = (XShmSegmentInfo *)ckalloc(sizeof (XShmSegmentInfo));
831 }
832
833 view->image =
834 XShmCreateImage(view->x->dpy, view->x->visual, view->x->depth,
835 view->x->color ? ZPixmap : XYBitmap,
836 NULL, view->shminfo,
837 view->m_width, view->m_height);
838
839 view->line_bytes = view->image->bytes_per_line;
840
841 switch (view->x->depth) {
842
843 case 1:
844 view->pixel_bytes = 0;
845 view->depth = 1;
846 break;
847
848 case 8:
849 view->pixel_bytes = 1;
850 view->depth = 8;
851 break;
852
853 case 15:
854 view->pixel_bytes = 2;
855 view->depth = 15;
856 break;
857
858 case 16:
859 view->pixel_bytes = 2;
860 view->depth = 16;
861 break;
862
863 case 24:
864 /* XXX: TODO: 24 and 32 bit support */
865 view->pixel_bytes = 4;
866 //view->pixel_bytes = 3;
867 view->depth = 24;
868 break;
869
870 case 32:
871 /* XXX: TODO: 24 and 32 bit support */
872 view->pixel_bytes = 4;
873 view->depth = 32;
874 break;
875
876 default:
877 view->pixel_bytes = 0;
878 view->depth = 0;
879 break;
880
881 } // switch
882
883 view->shminfo->shmid = shmget(IPC_PRIVATE,
884 (view->line_bytes *
885 view->m_height),
886 (IPC_CREAT | 0777));
887 if (view->shminfo->shmid < 0) {
888 perror("shmget");
889 fprintf(stderr,
890 "Darn, Micropolis can't share memory with X display \"%s\".\n",
891 view->x->display);
892 goto FALL_BACK;
893 }
894
895 view->data = (unsigned char *)shmat(view->shminfo->shmid, 0, 0);
896 if ((int)view->data == -1) {
897 perror("shmat");
898 fprintf(stderr,
899 "Darn, Micropolis can't find any memory to share with display \"%s\".\n",
900 view->x->display);
901 goto FALL_BACK;
902 }
903
904 view->image->data = (char *)view->data;
905 view->shminfo->shmaddr = (char *)view->data;
906 view->shminfo->readOnly = False;
907
908 { int (*old)();
909 int result;
910 int attached = 0;
911 GotXError = 0;
912 old = XSetErrorHandler(CatchXError);
913
914 result =
915 XShmAttach(view->x->dpy, view->shminfo);
916 if (result == 0) {
917 fprintf(stderr,
918 "Darn, the X display \"%s\" can't access Micropolis's shared memory.\n",
919 view->x->display);
920 GotXError = 1;
921 }
922
923 XSync(view->x->dpy, False);
924
925 if (!GotXError) {
926 attached = 1;
927 view->pixmap = XShmCreatePixmap(view->x->dpy, view->x->root,
928 view->data, view->shminfo,
929 view->m_width, view->m_height,
930 view->x->depth);
931 XSync(view->x->dpy, False);
932
933 if (GotXError ||
934 (view->pixmap == None)) {
935 fprintf(stderr,
936 "Darn, Micropolis couldn't get a shared memory pixmap on X display \"%s\".\n",
937 view->x->display);
938 GotXError = 1;
939 }
940 }
941
942 XSetErrorHandler(old);
943
944 if (GotXError) {
945 view->pixmap = None;
946 if (attached) {
947 XShmDetach(view->x->dpy, view->shminfo);
948 } // if
949 result = shmdt(view->shminfo->shmaddr);
950 result = shmctl(view->shminfo->shmid, IPC_RMID, 0);
951 ckfree(view->shminfo);
952 view->shminfo = NULL;
953 if (view->image) {
954 view->image->data = NULL;
955 view->data = NULL;
956 XDestroyImage(view->image);
957 view->image = NULL;
958 }
959 goto FALL_BACK;
960 }
961
962 if (view->x->color) {
963 XSetForeground(view->x->dpy, view->x->gc,
964 view->pixels[COLOR_LIGHTBROWN]);
965 } else {
966 XSetForeground(view->x->dpy, view->x->gc,
967 view->pixels[COLOR_WHITE]);
968 }
969
970 XFillRectangle(view->x->dpy, view->pixmap, view->x->gc,
971 0, 0, view->m_width, view->m_height);
972 }
973 }
974
975 goto FINISH;
976
977 FALL_BACK:
978
979 fprintf(stderr,
980 "Falling back to the X network protocol on display \"%s\"...\n",
981 view->x->display);
982 #endif
983
984 view->x->shared = 0;
985 view->type = X_Wire_View;
986 if (view->pixmap != None) {
987 XFreePixmap(view->x->dpy, view->pixmap);
988 view->pixmap = None;
989 }
990 #ifndef MSDOS
991 if (view->shminfo) {
992 if (view->shminfo->shmid >= 0) {
993 if (view->shminfo->shmaddr) {
994 shmdt(view->shminfo->shmaddr);
995 }
996 shmctl(view->shminfo->shmid, IPC_RMID, 0);
997 }
998 ckfree((char *)view->shminfo);
999 view->shminfo = NULL;
1000 }
1001 #endif
1002 if (view->image) {
1003 view->image->data = NULL;
1004 XDestroyImage(view->image);
1005 view->image = NULL;
1006 }
1007 view->data = NULL;
1008 view->line_bytes = 0;
1009 view->pixel_bytes = 0;
1010 view->depth = 0;
1011
1012 SPRING_FORWARD:
1013
1014 if (resize || (view->pixmap == None)) {
1015 if (view->pixmap != None) {
1016 XFreePixmap(view->x->dpy, view->pixmap);
1017 view->pixmap = None;
1018 }
1019 view->pixmap = XCreatePixmap(view->x->dpy, view->x->root,
1020 view->m_width, view->m_height,
1021 view->x->depth);
1022 if (view->pixmap == None) {
1023 fprintf(stderr,
1024 "Sorry, Micropolis can't create pixmap on X display \"%s\".\n",
1025 view->x->display);
1026 sim_exit(1); // Just sets tkMustExit and ExitReturn
1027 return;
1028 }
1029 if (view->x->color) {
1030 XSetForeground(view->x->dpy, view->x->gc,
1031 view->pixels[COLOR_LIGHTBROWN]);
1032 } else {
1033 XSetForeground(view->x->dpy, view->x->gc,
1034 view->pixels[COLOR_WHITE]);
1035 }
1036 XFillRectangle(view->x->dpy, view->pixmap, view->x->gc,
1037 0, 0, view->m_width, view->m_height);
1038 }
1039
1040 FINISH:
1041
1042 if (view->class == Editor_Class) {
1043
1044 AllocTiles(view);
1045 DoAdjustPan(view);
1046
1047 } else if (view->class == Map_Class) {
1048
1049 if (view->type == X_Mem_View) { /* Memory Map */
1050
1051 if (view->x->color) {
1052
1053 /* Color, Shared Memory */
1054
1055 view->data8 = view->data;
1056 view->line_bytes8 = view->line_bytes; /* XXX: ??? */
1057
1058 switch (view->x->depth) {
1059
1060 case 8:
1061 view->pixel_bytes = 1;
1062 view->depth = 8;
1063 break;
1064
1065 case 15:
1066 view->pixel_bytes = 2;
1067 view->depth = 15;
1068 break;
1069
1070 case 16:
1071 view->pixel_bytes = 2;
1072 view->depth = 16;
1073 break;
1074
1075 case 24:
1076 /* XXX: TODO: 24 and 32 bit support */
1077 view->pixel_bytes = 4;
1078 //view->pixel_bytes = 3;
1079 view->depth = 24;
1080 break;
1081
1082 case 32:
1083 /* XXX: TODO: 24 and 32 bit support */
1084 view->pixel_bytes = 4;
1085 view->depth = 32;
1086 break;
1087
1088 default:
1089 view->pixel_bytes = 0;
1090 view->depth = 0;
1091 break;
1092
1093 } // switch
1094
1095 } else {
1096
1097 /* Black and White, Shared Memory */
1098
1099 if (view->other_image != NULL) {
1100 XDestroyImage(view->other_image);
1101 }
1102
1103 view->line_bytes8 = view->m_width; /* XXX: fix depth */
1104 view->pixel_bytes = 0;
1105 view->depth = 1;
1106
1107 view->other_data = view->data8 =
1108 AllocPixels(view->m_height * view->line_bytes8, /* XXX: fix depth */
1109 view->pixels[COLOR_WHITE]);
1110 view->other_image =
1111 XCreateImage(view->x->dpy, view->x->visual, 8, /* XXX: fix depth */
1112 ZPixmap, 0, (char *)view->other_data,
1113 view->m_width, view->m_height,
1114 8, view->line_bytes8); /* XXX: fix depth */
1115 }
1116
1117 } else { /* Wire Map */
1118 int bitmap_pad;
1119 int bitmap_depth;
1120
1121 if (view->image != NULL) {
1122 XDestroyImage(view->image);
1123 view->image = NULL;
1124 }
1125
1126 if (view->other_image != NULL) {
1127 XDestroyImage(view->other_image);
1128 view->other_image = NULL;
1129 }
1130
1131 if (view->x->color) {
1132
1133 /* Color, Wire */
1134
1135 switch (view->x->depth) {
1136
1137 case 8:
1138 view->pixel_bytes = 1;
1139 view->depth = 8;
1140 bitmap_pad = 8;
1141 bitmap_depth = 8;
1142 view->line_bytes8 =
1143 ((view->m_width * view->pixel_bytes) + 3) & (~3);
1144 break;
1145
1146 case 15:
1147 view->pixel_bytes = 2;
1148 view->depth = 15;
1149 bitmap_pad = 16;
1150 bitmap_depth = 16;
1151 view->line_bytes8 =
1152 ((view->m_width * view->pixel_bytes) + 3) & (~3);
1153 break;
1154
1155 case 16:
1156 view->pixel_bytes = 2;
1157 view->depth = 16;
1158 bitmap_pad = 16;
1159 bitmap_depth = 16;
1160 view->line_bytes8 =
1161 ((view->m_width * view->pixel_bytes) + 3) & (~3);
1162 break;
1163
1164 case 24:
1165 view->pixel_bytes = 4;
1166 //view->pixel_bytes = 3;
1167 view->depth = 24;
1168 bitmap_depth = 24;
1169 bitmap_pad = 32;
1170 view->line_bytes8 =
1171 ((view->m_width * 4) + 3) & (~3);
1172 break;
1173
1174 case 32:
1175 view->pixel_bytes = 4;
1176 view->depth = 32;
1177 bitmap_pad = 32;
1178 bitmap_depth = 32;
1179 view->line_bytes8 =
1180 ((view->m_width * 4) + 3) & (~3);
1181 break;
1182
1183 default:
1184 assert(0); /* Unknown depth */
1185 break;
1186
1187 } // switch
1188
1189 view->line_bytes =
1190 view->line_bytes8;
1191
1192 } else {
1193
1194 /* Black and White, Wire */
1195
1196 view->pixel_bytes = 0;
1197 view->depth = 1;
1198 view->line_bytes8 =
1199 (view->m_width + 3) & (~3); /* XXX: handle depth */
1200 view->line_bytes =
1201 (view->m_width + 7) >>3;
1202 bitmap_pad = 8;
1203 bitmap_depth = 8;
1204
1205 }
1206
1207 view->data =
1208 AllocPixels(view->m_height * view->line_bytes, 0);
1209 view->image =
1210 XCreateImage(view->x->dpy, view->x->visual,
1211 bitmap_depth,
1212 view->x->color ? ZPixmap : XYBitmap,
1213 0, (char *)view->data,
1214 view->m_width, view->m_height,
1215 bitmap_pad,
1216 view->line_bytes);
1217
1218 view->other_data =
1219 AllocPixels(view->m_height * view->line_bytes8, 0);
1220 view->other_image =
1221 XCreateImage(view->x->dpy, view->x->visual,
1222 bitmap_depth,
1223 ZPixmap,
1224 0, (char *)view->other_data,
1225 view->m_width, view->m_height,
1226 bitmap_pad,
1227 view->line_bytes);
1228
1229 if (view->x->color) {
1230 view->data8 = view->data;
1231 } else {
1232 view->data8 = view->other_data;
1233 }
1234 }
1235 }
1236 }
1237
1238
1239 DoPanBy(struct SimView *view, int dx, int dy)
1240 {
1241 DoPanTo(view, view->pan_x + dx, view->pan_y + dy);
1242 }
1243
1244
1245 DoPanTo(struct SimView *view, int x, int y)
1246 {
1247 if (view->class != Editor_Class) {
1248 return;
1249 }
1250
1251 if (x < 0) x = 0;
1252 if (y < 0) y = 0;
1253 if (x > view->i_width) x = view->i_width - 1;
1254 if (y > view->i_height) y = view->i_height - 1;
1255 if ((view->pan_x != x) ||
1256 (view->pan_y != y)) {
1257 view->pan_x = x;
1258 view->pan_y = y;
1259 DoAdjustPan(view);
1260 }
1261 }
1262
1263 /* #define DEBUG_PAN */
1264
1265 DoAdjustPan(struct SimView *view)
1266 {
1267 int ww2 = view->w_width >>1, wh2 = view->w_height >>1;
1268 int px = view->pan_x, py = view->pan_y;
1269 int last_tile_x = view->tile_x, last_tile_y = view->tile_y;
1270 int last_tile_width = view->tile_width, last_tile_height = view->tile_height;
1271 int total_width = view->m_width >>4, total_height = view->m_height >>4;
1272 //fprintf(stderr, "DoAdjustPan\n");
1273
1274 #ifdef DEBUG_PAN
1275 printf("AdjustPan window %d %d ww2 %d wh2 %d pan %d %d\n",
1276 view->w_width, view->w_height, ww2, wh2, px, py);
1277 printf(" last tile %d %d %d %d\n",
1278 last_tile_x, last_tile_y, last_tile_width, last_tile_height);
1279 #endif
1280
1281 if ((view->tile_x = ((px - ww2) >>4)) < 0)
1282 view->tile_x = 0;
1283 if ((view->tile_y = ((py - wh2) >>4)) < 0)
1284 view->tile_y = 0;
1285
1286 #ifdef DEBUG_PAN
1287 printf(" now tile %d %d\n", view->tile_x, view->tile_y);
1288 #endif
1289
1290 view->tile_width = ((15 + px + ww2) >>4);
1291 view->tile_height = ((15 + py + wh2) >>4);
1292
1293 #ifdef DEBUG_PAN
1294 printf(" outer tile %d %d\n", view->tile_width, view->tile_height);
1295 #endif
1296
1297 if (view->tile_width > (view->i_width >>4))
1298 view->tile_width = (view->i_width >>4);
1299 view->tile_width -= view->tile_x;
1300 if (view->tile_height > (view->i_height >>4))
1301 view->tile_height = (view->i_height >>4);
1302 view->tile_height -= view->tile_y;
1303
1304 #ifdef DEBUG_PAN
1305 printf(" tile size %d %d\n", view->tile_width, view->tile_height);
1306 #endif
1307
1308 if (view->tile_width > (view->m_width >>4))
1309 view->tile_width = (view->m_width >>4);
1310 if (view->tile_height > (view->m_height >>4))
1311 view->tile_height = (view->m_height >>4);
1312
1313 #ifdef DEBUG_PAN
1314 printf(" clipped size %d %d\n", view->tile_width, view->tile_height);
1315 printf(" maximum size %d %d\n", view->m_width >>4, view->m_height >>4);
1316 #endif
1317
1318 view->screen_x = (ww2 - px) + (view->tile_x <<4);
1319 view->screen_y = (wh2 - py) + (view->tile_y <<4);
1320 view->screen_width = (view->tile_width <<4);
1321 view->screen_height = (view->tile_height <<4);
1322
1323 #ifdef DEBUG_PAN
1324 printf(" screen %d %d %d %d\n",
1325 view->screen_x, view->screen_y,
1326 view->screen_width, view->screen_height);
1327 #endif
1328
1329 view->overlay_mode = 0;
1330 // view->skip = 0;
1331 view->invalid = 1;
1332 if (SimSpeed == 0) {
1333 EventuallyRedrawView(view);
1334 }
1335 /* InvalidateEditors(); */
1336 if (view->show_me) {
1337 RedrawMaps();
1338 }
1339 /* FixMicropolisTimer(); */
1340
1341 { int dx = last_tile_x - view->tile_x,
1342 dy = last_tile_y - view->tile_y;
1343 short **want = view->other_tiles,
1344 **have = view->tiles;
1345
1346 #ifdef DEBUG_PAN
1347 printf("scrolling %d %d\n", dx, dy);
1348 #endif
1349
1350 if ((dx != 0) || (dy != 0)) {
1351 int row, col, x, y,
1352 width = view->tile_width,
1353 height = view->tile_height;
1354
1355 for (col = 0; col < width; col++)
1356 memcpy(want[col], have[col], (height * sizeof(short)));
1357
1358 for (col = 0; col < total_width; col++) {
1359 x = col - dx;
1360 for (row = 0; row < total_height; row++) {
1361 y = row - dy;
1362 if ((x >= 0) && (x < width) &&
1363 (y >= 0) && (y < height)) {
1364 have[col][row] = want[x][y];
1365 } else {
1366 have[col][row] = -1;
1367 }
1368 }
1369 }
1370
1371 XCopyArea(view->x->dpy, view->pixmap, view->pixmap, view->x->gc,
1372 0, 0, view->tile_width <<4, view->tile_height <<4,
1373 dx <<4, dy <<4);
1374
1375 if (view->type == X_Mem_View) {
1376 XSync(view->x->dpy, False);
1377 }
1378 }
1379 }
1380 }
1381
1382
1383 AllocTiles(SimView *view)
1384 {
1385 int row, col;
1386 short **have, **want;
1387 int w = view->m_width / 16, h = view->m_height / 16;
1388 int n = (w + 1) * sizeof (short *);
1389
1390 if (view->tiles)
1391 FreeTiles(view);
1392
1393 have = view->tiles =
1394 (short **)ckalloc(n);
1395
1396 want = view->other_tiles =
1397 (short **)ckalloc(n);
1398
1399 have[w] = want[w] = NULL;
1400
1401 n = h * sizeof(short);
1402 for (col = 0; col < w; col++) {
1403
1404 have[col] = (short *)ckalloc(n);
1405 want[col] = (short *)ckalloc(n);
1406 for (row = 0; row < h; row++) {
1407 have[col][row] = -1;
1408 want[col][row] = -1;
1409 }
1410 }
1411 }
1412
1413
1414 FreeTiles(SimView *view)
1415 {
1416 int col;
1417
1418 for (col = 0; view->tiles[col] != NULL; col++) {
1419 ckfree ((char *)view->tiles[col]);
1420 ckfree ((char *)view->other_tiles[col]);
1421 }
1422 ckfree ((char *)view->tiles);
1423 view->tiles = NULL;
1424 ckfree ((char *)view->other_tiles);
1425 view->other_tiles = NULL;
1426 }
1427
1428
1429 #define POINT_BATCH 32
1430
1431 Ink *OldInk = NULL;
1432
1433
1434 /* XXX: todo: ink locking so someone doesn't erase ink that's being drawn */
1435
1436 Ink *
1437 NewInk()
1438 {
1439 Ink *ink;
1440
1441 if (OldInk) {
1442 ink = OldInk;
1443 OldInk = OldInk->next;
1444 } else {
1445 ink = (Ink *)ckalloc(sizeof(Ink));
1446 ink->maxlength = POINT_BATCH;
1447 ink->points = (XPoint *)ckalloc(POINT_BATCH * sizeof(XPoint));
1448 }
1449 ink->length = 0;
1450 ink->color = COLOR_WHITE;
1451 ink->next = NULL;
1452 ink->left = ink->right = ink->top = ink->bottom =
1453 ink->last_x = ink->last_y = -1;
1454 return (ink);
1455 }
1456
1457
1458 FreeInk(Ink *ink)
1459 {
1460 ink->next = OldInk;
1461 OldInk = ink;
1462 }
1463
1464
1465 StartInk(Ink *ink, int x, int y)
1466 {
1467 ink->length = 1;
1468 ink->left = ink->right = ink->last_x = ink->points[0].x = x;
1469 ink->top = ink->bottom = ink->last_y = ink->points[0].y = y;
1470 }
1471
1472
1473 AddInk(Ink *ink, int x, int y)
1474 {
1475 int dx = x - ink->last_x;
1476 int dy = y - ink->last_y;
1477
1478 if ((dx != 0) || (dy != 0)) {
1479 /*
1480 if (ink->length > 1) {
1481 if ((dx == 0) &&
1482 (ink->points[ink->length - 1].x == 0) &&
1483 ((ink->points[ink->length - 1].y < 0) ?
1484 (dy < 0) : (dy > 0))) {
1485 ink->points[ink->length - 1].y += dy;
1486 goto ADJUST;
1487 } else if ((dy == 0) &&
1488 (ink->points[ink->length - 1].y == 0) &&
1489 ((ink->points[ink->length - 1].x < 0) ?
1490 (dx < 0) : (dx > 0))) {
1491 ink->points[ink->length - 1].x += dx;
1492 goto ADJUST;
1493 }
1494 }
1495 */
1496
1497 if (ink->length >= ink->maxlength) {
1498 ink->maxlength += POINT_BATCH;
1499 ink->points = (XPoint *)realloc((void *)ink->points,
1500 ink->maxlength * sizeof(XPoint));
1501 }
1502 ink->points[ink->length].x = dx;
1503 ink->points[ink->length].y = dy;
1504 ink->length++;
1505
1506 ADJUST:
1507 if (x < ink->left)
1508 ink->left = x;
1509 if (x > ink->right)
1510 ink->right = x;
1511 if (y < ink->top)
1512 ink->top = y;
1513 if (y > ink->bottom)
1514 ink->bottom = y;
1515
1516 { int left, right, top, bottom;
1517 SimView *view;
1518
1519 if (ink->last_x < x) { left = ink->last_x; right = x; }
1520 else { left = x; right = ink->last_x; }
1521 if (ink->last_y < y) { top = ink->last_y; bottom = y; }
1522 else { top = y; bottom = ink->last_y; }
1523
1524 left -= 5; right += 5; top -= 5; bottom += 5;
1525
1526 for (view = sim->editor; view != NULL; view = view->next) {
1527 int vleft, vtop;
1528
1529 if ((right >= (vleft = view->pan_x - (view->w_width / 2))) &&
1530 (left <= vleft + view->w_width) &&
1531 (bottom >= (vtop = view->pan_y - (view->w_height / 2))) &&
1532 (top <= vtop + view->w_height)) {
1533 /* XXX: do studly incremental update instead */
1534 view->overlay_mode = 0;
1535 EventuallyRedrawView(view);
1536 }
1537 }
1538 }
1539 ink->last_x = x; ink->last_y = y;
1540 }
1541 }
1542
1543
1544 EraseOverlay()
1545 {
1546 Ink *ink;
1547
1548 while (sim->overlay) {
1549 ink = sim->overlay;
1550 sim->overlay = ink->next;
1551 FreeInk(ink);
1552 }
1553 }
Micropolis
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