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