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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
65struct XDisplay *XDisplays = NULL;
66int DisplayCount = 0;
67#ifdef IS_LINUX
68int FlushStyle = 3;
69#else
70int FlushStyle = 4;
71#endif
72int GotXError;
73
74
75unsigned 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
95ViewToTileCoords(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
123ViewToPixelCoords(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
151UpdateFlush()
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
207int
208CatchXError(Display *dpy, XErrorEvent *err)
209{
210 GotXError = 1;
211#if 0
212printf("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
219DoStopMicropolis()
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
247DoTimeoutListen()
248{
249 while (Tk_DoOneEvent(TK_DONT_WAIT)) ;
250}
251
252
253Sim *
254MakeNewSim()
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
272XDisplay *
273FindXDisplay(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 xd->shared = 1;
445 }
446 }
447 }
448#else
449 xd->shared = 0;
450#endif
451
452 xd->request = -1;
453 xd->last_request_read = -1;
454 xd->big_tile_pixmap = None;
455 xd->objects = NULL;
456 xd->overlay_gc = NULL;
457 xd->gray25_stipple = None;
458 xd->gray50_stipple = None;
459 xd->gray75_stipple = None;
460 xd->vert_stipple = None;
461 xd->horiz_stipple = None;
462 xd->diag_stipple = None;
463
464 xd->big_tile_image = xd->small_tile_image = NULL;
465
466 xd->next = XDisplays; XDisplays = xd;
467 }
468
469 return (xd);
470}
471
472
473IncRefDisplay(XDisplay *xd)
474{
475 xd->references++;
476}
477
478
479DecRefDisplay(XDisplay *xd)
480{
481 if ((--xd->references) == 0) {
482 /* I'd blow it away, but tk may still be using the display */
483 }
484}
485
486
487SimView *
488InitNewView(SimView *view, char *title, int class, int w, int h)
489{
490 int type, i;
491 int d = 8;
492 unsigned long valuemask = 0;
493 char *t;
494 struct XDisplay *xd;
495 XGCValues values;
496 XColor rgb, *color;
497
498 t = (char *)ckalloc(strlen(title) + 1);
499 strcpy(t, title);
500
501 view->next = NULL;
502 view->title = t;
503 view->type = -1;
504 view->class = class;
505 view->bigtiles = view->smalltiles = NULL;
506 view->pixels = NULL;
507 view->line_bytes = 0;
508 view->line_bytes8 = 0;
509 view->pixel_bytes = 0;
510 view->depth = 0;
511 view->data = NULL;
512 view->data8 = NULL;
513 view->visible = 0;
514 view->invalid = 0;
515 view->skips = view->skip = 0;
516 view->update = 0;
517 view->map_state = ALMAP;
518 view->show_editors = 1;
519 view->tool_showing = 0;
520 view->tool_mode = 0;
521 view->tool_x = view->tool_y = 0;
522 view->tool_x_const = view->tool_y_const = -1;
523 view->tool_state = dozeState;
524 view->tool_state_save = -1;
525 view->super_user = 0;
526 view->show_me = 1;
527 view->dynamic_filter = 0;
528 view->auto_scroll_token = 0;
529 view->tool_event_time = 0;
530 view->tool_last_event_time = 0;
531 view->w_x = view->w_y = 0;
532 view->w_width = view->w_height = 16;
533 view->m_width = view->m_height = 0;
534 view->i_width = w; view->i_height = h;
535 view->pan_x = view->pan_y = 0;
536 view->tile_x = view->tile_y = 0;
537 view->tile_width = view->tile_height = 0;
538 view->screen_x = view->screen_y = 0;
539 view->screen_width = view->screen_height = 0;
540 view->last_x = view->last_y = view->last_button = 0;
541 view->track_info = NULL;
542 view->message_var = NULL;
543
544/* This stuff was initialized in our caller (SimViewCmd) */
545/* view->tkwin = NULL; */
546/* view->interp = NULL; */
547/* view->flags = 0; */
548
549 view->x = NULL;
550 view->shminfo = NULL;
551 view->tiles = NULL;
552 view->other_tiles = NULL;
553 view->image = NULL;
554 view->other_image = NULL;
555 view->other_data = NULL;
556 view->pixmap = None;
557 view->pixmap2 = None;
558 view->overlay_pixmap = None;
559 view->overlay_valid = 0;
560 view->fontPtr = NULL;
561 view->updates = 0;
562 view->update_real = view->update_user = view->update_system = 0.0;
563 view->update_context = 0;
564 view->auto_goto = 0;
565 view->auto_going = 0;
566 view->auto_x_goal = view->auto_x_goal = 0;
567 view->auto_speed = 75;
568 view->follow = NULL;
569 view->sound = 1;
570 view->width = 0; view->height = 0;
571 view->show_overlay = 1;
572 view->overlay_mode = 0;
573
574 view->x = FindXDisplay(view->tkwin);
575 IncRefDisplay(view->x);
576
577 /* view->x->shared is 1 if the shared memory extension is present and
578 supports shared memory pixmaps, and -1 if it is present but doesn't. */
579 if (view->x->shared != 1) {
580 view->type = X_Wire_View;
581 } else {
582 view->type = X_Mem_View;
583 }
584
585 GetPixmaps(view->x);
586 view->pixels = view->x->pixels;
587
588 if (w == EDITOR_W) w = 256; /* XXX */
589 if (h == EDITOR_H) h = 256; /* XXX */
590
591 view->pan_x = w / 2; view->pan_y = h / 2;
592 DoResizeView(view, w, h);
593
594 GetViewTiles(view);
595
596 return (view);
597}
598
599
600DestroyView(SimView *view)
601{
602 SimView **vp;
603
604 CancelRedrawView(view);
605
606 for (vp = ((view->class == Editor_Class) ?
607 (&sim->editor) : (&sim->map));
608 (*vp) != NULL;
609 vp = &((*vp)->next)) {
610 if ((*vp) == view) {
611 (*vp) = view->next;
612 if (view->class == Editor_Class)
613 sim->editors--;
614 else
615 sim->maps--;
616
617 break;
618 }
619 }
620
621 if (view->title != NULL) {
622 ckfree (view->title);
623 view->title = NULL;
624 }
625
626 if (view->pixmap != None) {
627 XFreePixmap(view->x->dpy, view->pixmap);
628 view->pixmap = None;
629 }
630
631 if (view->pixmap2 != None) {
632 XFreePixmap(view->x->dpy, view->pixmap2);
633 view->pixmap2 = None;
634 }
635
636 if (view->overlay_pixmap != None) {
637 XFreePixmap(view->x->dpy, view->overlay_pixmap);
638 view->overlay_pixmap = None;
639 }
640
641 if (view->auto_scroll_token) {
642 Tk_DeleteTimerHandler(view->auto_scroll_token);
643 view->auto_scroll_token = 0;
644 }
645
646#ifndef MSDOS
647 if (view->shminfo) {
648 XShmDetach(view->x->dpy, view->shminfo);
649 shmdt(view->shminfo->shmaddr);
650 shmctl(view->shminfo->shmid, IPC_RMID, 0);
651 ckfree(view->shminfo);
652 view->shminfo = NULL;
653 if (view->image) {
654 view->image->data = NULL;
655 view->data = NULL;
656 XDestroyImage(view->image);
657 view->image = NULL;
658 }
659 } else {
660#endif
661 if (view->image) {
662 if (view->image->data) {
663 ckfree(view->image->data);
664 view->image->data = NULL;
665 }
666 view->data = NULL;
667 XDestroyImage(view->image);
668 view->image = NULL;
669 }
670#ifndef MSDOS
671 }
672#endif
673
674 if (view->other_image) {
675 if (view->other_image->data) {
676 ckfree(view->other_image->data);
677 view->other_image->data = NULL;
678 }
679 view->other_data = NULL;
680 XDestroyImage(view->other_image);
681 view->other_image = NULL;
682 }
683
684 if (view->tiles)
685 FreeTiles(view);
686
687 DecRefDisplay(view->x);
688
689 ckfree((char *) view);
690}
691
692
693unsigned char *
694AllocPixels(int len, unsigned char pixel)
695{
696 int i;
697 unsigned char *data, *cp;
698
699 cp = data = (unsigned char *)ckalloc(len);
700 for (i = len; i > 0; i--) {
701 *(cp++) = pixel;
702 }
703
704 return (data);
705}
706
707
708DoResizeView(SimView *view, int w, int h)
709{
710 int resize = 0;
711
712 view->w_width = w;
713 view->w_height = h;
714
715 if (view->class == Map_Class) { /* Map_Class */
716 view->m_width = w;
717 view->m_height = h;
718
719 if (view->pixmap2 == None) {
720
721 view->pixmap2 = XCreatePixmap(view->x->dpy, view->x->root,
722 w, h, view->x->depth);
723 if (view->pixmap2 == None) {
724 fprintf(stderr,
725 "Sorry, Micropolis can't create a pixmap on X display \"%s\"!\n",
726 view->x->display);
727 sim_exit(1); // Just sets tkMustExit and ExitReturn
728 return;
729 }
730 }
731
732 } else { /* Editor_Class */
733
734 if ((w = (w + 31) & (~15)) > view->m_width)
735 view->m_width = w, resize++;
736 if ((h = (h + 31) & (~15)) > view->m_height)
737 view->m_height = h, resize++;
738
739 if (resize || (view->pixmap2 == None)) {
740 if (view->pixmap2 != None) {
741 XFreePixmap(view->x->dpy, view->pixmap2);
742 view->pixmap2 = None;
743 }
744 view->pixmap2 = XCreatePixmap(view->x->dpy, view->x->root,
745 view->m_width, view->m_height,
746 view->x->depth);
747 if (view->pixmap2 == None) {
748 fprintf(stderr,
749 "Sorry, Micropolis couldn't create a pixmap on X display \"%s\"!\n",
750 view->x->display);
751 sim_exit(1); // Just sets tkMustExit and ExitReturn
752 return;
753 }
754 }
755
756 if (resize || (view->overlay_pixmap == None)) {
757 view->overlay_mode = 0;
758 if (view->overlay_pixmap != None) {
759 XFreePixmap(view->x->dpy, view->overlay_pixmap);
760 view->overlay_pixmap = None;
761 }
762 view->overlay_pixmap = XCreatePixmap(view->x->dpy, view->x->root,
763 view->m_width, view->m_height,
764 1);
765 if (view->overlay_pixmap == None) {
766 fprintf(stderr,
767 "Sorry, Micropolis couldn't create another pixmap on X display \"%s\".\n",
768 view->x->display);
769 sim_exit(1); // Just sets tkMustExit and ExitReturn
770 return;
771 }
772 if (view->x->overlay_gc == NULL) {
773 unsigned long valuemask = 0;
774 XGCValues values;
775
776 view->x->overlay_gc =
777 XCreateGC(view->x->dpy, view->overlay_pixmap, valuemask, &values);
778 XSetForeground(view->x->dpy, view->x->overlay_gc, 0);
779 XSetBackground(view->x->dpy, view->x->overlay_gc, 1);
780 XSetLineAttributes(view->x->dpy, view->x->overlay_gc,
781 1, LineSolid, CapButt, JoinMiter);
782 XSetGraphicsExposures(view->x->dpy, view->x->overlay_gc, False);
783 }
784 }
785
786 }
787
788#ifndef MSDOS
789 if (view->type != X_Mem_View) {
790 goto SPRING_FORWARD;
791 }
792
793 if (resize || (view->image == NULL)) {
794 if (view->shminfo && view->image) {
795 if (view->pixmap != None) {
796 XFreePixmap(view->x->dpy, view->pixmap);
797 view->pixmap = None;
798 }
799 XShmDetach(view->x->dpy, view->shminfo);
800 shmdt(view->shminfo->shmaddr);
801 shmctl(view->shminfo->shmid, IPC_RMID, 0);
802 view->image->data = NULL;
803 if (view->data == view->data8)
804 view->data8 = NULL;
805 view->data = NULL;
806 XDestroyImage(view->image);
807 view->image = NULL;
808 }
809
810#if 0
811 /* XShmPixmapFormat is documented but does not exist !!! */
812 if (XShmPixmapFormat(view->x->dpy) != ZPixmap) {
813 fprintf(stderr,
814 "Darn, display \"%s\" has the wrong shared memory format.\n",
815 view->x->display);
816 goto FALL_BACK;
817 }
818#endif
819
820 if (!view->shminfo) {
821 view->shminfo = (XShmSegmentInfo *)ckalloc(sizeof (XShmSegmentInfo));
822 }
823
824 view->image =
825 XShmCreateImage(view->x->dpy, view->x->visual, view->x->depth,
826 view->x->color ? ZPixmap : XYBitmap,
827 NULL, view->shminfo,
828 view->m_width, view->m_height);
829
830 view->line_bytes = view->image->bytes_per_line;
831
832 switch (view->x->depth) {
833
834 case 1:
835 view->pixel_bytes = 0;
836 view->depth = 1;
837 break;
838
839 case 8:
840 view->pixel_bytes = 1;
841 view->depth = 8;
842 break;
843
844 case 15:
845 view->pixel_bytes = 2;
846 view->depth = 15;
847 break;
848
849 case 16:
850 view->pixel_bytes = 2;
851 view->depth = 16;
852 break;
853
854 case 24:
855 /* XXX: TODO: 24 and 32 bit support */
856 view->pixel_bytes = 4;
857 //view->pixel_bytes = 3;
858 view->depth = 24;
859 break;
860
861 case 32:
862 /* XXX: TODO: 24 and 32 bit support */
863 view->pixel_bytes = 4;
864 view->depth = 32;
865 break;
866
867 default:
868 view->pixel_bytes = 0;
869 view->depth = 0;
870 break;
871
872 } // switch
873
874 view->shminfo->shmid = shmget(IPC_PRIVATE,
875 (view->line_bytes *
876 view->m_height),
877 (IPC_CREAT | 0777));
878 if (view->shminfo->shmid < 0) {
879 perror("shmget");
880 fprintf(stderr,
881 "Darn, Micropolis can't share memory with X display \"%s\".\n",
882 view->x->display);
883 goto FALL_BACK;
884 }
885
886 view->data = (unsigned char *)shmat(view->shminfo->shmid, 0, 0);
887 if ((int)view->data == -1) {
888 perror("shmat");
889 fprintf(stderr,
890 "Darn, Micropolis can't find any memory to share with display \"%s\".\n",
891 view->x->display);
892 goto FALL_BACK;
893 }
894
895 view->image->data = (char *)view->data;
896 view->shminfo->shmaddr = (char *)view->data;
897 view->shminfo->readOnly = False;
898
899 { int (*old)();
900 int result;
901 int attached = 0;
902 GotXError = 0;
903 old = XSetErrorHandler(CatchXError);
904
905 result =
906 XShmAttach(view->x->dpy, view->shminfo);
907 if (result == 0) {
908 fprintf(stderr,
909 "Darn, the X display \"%s\" can't access Micropolis's shared memory.\n",
910 view->x->display);
911 GotXError = 1;
912 }
913
914 XSync(view->x->dpy, False);
915
916 if (!GotXError) {
917 attached = 1;
918 view->pixmap = XShmCreatePixmap(view->x->dpy, view->x->root,
919 view->data, view->shminfo,
920 view->m_width, view->m_height,
921 view->x->depth);
922 XSync(view->x->dpy, False);
923
924 if (GotXError ||
925 (view->pixmap == None)) {
926 fprintf(stderr,
927 "Darn, Micropolis couldn't get a shared memory pixmap on X display \"%s\".\n",
928 view->x->display);
929 GotXError = 1;
930 }
931 }
932
933 XSetErrorHandler(old);
934
935 if (GotXError) {
936 view->pixmap = None;
937 if (attached) {
938 XShmDetach(view->x->dpy, view->shminfo);
939 } // if
940 result = shmdt(view->shminfo->shmaddr);
941 result = shmctl(view->shminfo->shmid, IPC_RMID, 0);
942 ckfree(view->shminfo);
943 view->shminfo = NULL;
944 if (view->image) {
945 view->image->data = NULL;
946 view->data = NULL;
947 XDestroyImage(view->image);
948 view->image = NULL;
949 }
950 goto FALL_BACK;
951 }
952
953 if (view->x->color) {
954 XSetForeground(view->x->dpy, view->x->gc,
955 view->pixels[COLOR_LIGHTBROWN]);
956 } else {
957 XSetForeground(view->x->dpy, view->x->gc,
958 view->pixels[COLOR_WHITE]);
959 }
960
961 XFillRectangle(view->x->dpy, view->pixmap, view->x->gc,
962 0, 0, view->m_width, view->m_height);
963 }
964 }
965
966 goto FINISH;
967
968 FALL_BACK:
969
970 fprintf(stderr,
971 "Falling back to the X network protocol on display \"%s\"...\n",
972 view->x->display);
973#endif
974
975 view->x->shared = 0;
976 view->type = X_Wire_View;
977 if (view->pixmap != None) {
978 XFreePixmap(view->x->dpy, view->pixmap);
979 view->pixmap = None;
980 }
981#ifndef MSDOS
982 if (view->shminfo) {
983 if (view->shminfo->shmid >= 0) {
984 if (view->shminfo->shmaddr) {
985 shmdt(view->shminfo->shmaddr);
986 }
987 shmctl(view->shminfo->shmid, IPC_RMID, 0);
988 }
989 ckfree((char *)view->shminfo);
990 view->shminfo = NULL;
991 }
992#endif
993 if (view->image) {
994 view->image->data = NULL;
995 XDestroyImage(view->image);
996 view->image = NULL;
997 }
998 view->data = NULL;
999 view->line_bytes = 0;
1000 view->pixel_bytes = 0;
1001 view->depth = 0;
1002
1003 SPRING_FORWARD:
1004
1005 if (resize || (view->pixmap == None)) {
1006 if (view->pixmap != None) {
1007 XFreePixmap(view->x->dpy, view->pixmap);
1008 view->pixmap = None;
1009 }
1010 view->pixmap = XCreatePixmap(view->x->dpy, view->x->root,
1011 view->m_width, view->m_height,
1012 view->x->depth);
1013 if (view->pixmap == None) {
1014 fprintf(stderr,
1015 "Sorry, Micropolis can't create pixmap on X display \"%s\".\n",
1016 view->x->display);
1017 sim_exit(1); // Just sets tkMustExit and ExitReturn
1018 return;
1019 }
1020 if (view->x->color) {
1021 XSetForeground(view->x->dpy, view->x->gc,
1022 view->pixels[COLOR_LIGHTBROWN]);
1023 } else {
1024 XSetForeground(view->x->dpy, view->x->gc,
1025 view->pixels[COLOR_WHITE]);
1026 }
1027 XFillRectangle(view->x->dpy, view->pixmap, view->x->gc,
1028 0, 0, view->m_width, view->m_height);
1029 }
1030
1031 FINISH:
1032
1033 if (view->class == Editor_Class) {
1034
1035 AllocTiles(view);
1036 DoAdjustPan(view);
1037
1038 } else if (view->class == Map_Class) {
1039
1040 if (view->type == X_Mem_View) { /* Memory Map */
1041
1042 if (view->x->color) {
1043
1044 /* Color, Shared Memory */
1045
1046 view->data8 = view->data;
1047 view->line_bytes8 = view->line_bytes; /* XXX: ??? */
1048
1049 switch (view->x->depth) {
1050
1051 case 8:
1052 view->pixel_bytes = 1;
1053 view->depth = 8;
1054 break;
1055
1056 case 15:
1057 view->pixel_bytes = 2;
1058 view->depth = 15;
1059 break;
1060
1061 case 16:
1062 view->pixel_bytes = 2;
1063 view->depth = 16;
1064 break;
1065
1066 case 24:
1067 /* XXX: TODO: 24 and 32 bit support */
1068 view->pixel_bytes = 4;
1069 //view->pixel_bytes = 3;
1070 view->depth = 24;
1071 break;
1072
1073 case 32:
1074 /* XXX: TODO: 24 and 32 bit support */
1075 view->pixel_bytes = 4;
1076 view->depth = 32;
1077 break;
1078
1079 default:
1080 view->pixel_bytes = 0;
1081 view->depth = 0;
1082 break;
1083
1084 } // switch
1085
1086 } else {
1087
1088 /* Black and White, Shared Memory */
1089
1090 if (view->other_image != NULL) {
1091 XDestroyImage(view->other_image);
1092 }
1093
1094 view->line_bytes8 = view->m_width; /* XXX: fix depth */
1095 view->pixel_bytes = 0;
1096 view->depth = 1;
1097
1098 view->other_data = view->data8 =
1099 AllocPixels(view->m_height * view->line_bytes8, /* XXX: fix depth */
1100 view->pixels[COLOR_WHITE]);
1101 view->other_image =
1102 XCreateImage(view->x->dpy, view->x->visual, 8, /* XXX: fix depth */
1103 ZPixmap, 0, (char *)view->other_data,
1104 view->m_width, view->m_height,
1105 8, view->line_bytes8); /* XXX: fix depth */
1106 }
1107
1108 } else { /* Wire Map */
1109 int bitmap_pad;
1110 int bitmap_depth;
1111
1112 if (view->image != NULL) {
1113 XDestroyImage(view->image);
1114 view->image = NULL;
1115 }
1116
1117 if (view->other_image != NULL) {
1118 XDestroyImage(view->other_image);
1119 view->other_image = NULL;
1120 }
1121
1122 if (view->x->color) {
1123
1124 /* Color, Wire */
1125
1126 switch (view->x->depth) {
1127
1128 case 8:
1129 view->pixel_bytes = 1;
1130 view->depth = 8;
1131 bitmap_pad = 8;
1132 bitmap_depth = 8;
1133 view->line_bytes8 =
1134 ((view->m_width * view->pixel_bytes) + 3) & (~3);
1135 break;
1136
1137 case 15:
1138 view->pixel_bytes = 2;
1139 view->depth = 15;
1140 bitmap_pad = 16;
1141 bitmap_depth = 16;
1142 view->line_bytes8 =
1143 ((view->m_width * view->pixel_bytes) + 3) & (~3);
1144 break;
1145
1146 case 16:
1147 view->pixel_bytes = 2;
1148 view->depth = 16;
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 24:
1156 view->pixel_bytes = 4;
1157 //view->pixel_bytes = 3;
1158 view->depth = 24;
1159 bitmap_depth = 32;
1160 bitmap_pad = 32;
1161 view->line_bytes8 =
1162 ((view->m_width * 4) + 3) & (~3);
1163 break;
1164
1165 case 32:
1166 view->pixel_bytes = 4;
1167 view->depth = 32;
1168 bitmap_pad = 32;
1169 bitmap_depth = 32;
1170 view->line_bytes8 =
1171 ((view->m_width * 4) + 3) & (~3);
1172 break;
1173
1174 default:
1175 assert(0); /* Unknown depth */
1176 break;
1177
1178 } // switch
1179
1180 view->line_bytes =
1181 view->line_bytes8;
1182
1183 } else {
1184
1185 /* Black and White, Wire */
1186
1187 view->pixel_bytes = 0;
1188 view->depth = 1;
1189 view->line_bytes8 =
1190 (view->m_width + 3) & (~3); /* XXX: handle depth */
1191 view->line_bytes =
1192 (view->m_width + 7) >>3;
1193 bitmap_pad = 8;
1194 bitmap_depth = 8;
1195
1196 }
1197
1198 view->data =
1199 AllocPixels(view->m_height * view->line_bytes, 0);
1200 view->image =
1201 XCreateImage(view->x->dpy, view->x->visual,
1202 bitmap_depth,
1203 view->x->color ? ZPixmap : XYBitmap,
1204 0, (char *)view->data,
1205 view->m_width, view->m_height,
1206 bitmap_pad,
1207 view->line_bytes);
1208
1209 view->other_data =
1210 AllocPixels(view->m_height * view->line_bytes8, 0);
1211 view->other_image =
1212 XCreateImage(view->x->dpy, view->x->visual,
1213 bitmap_depth,
1214 ZPixmap,
1215 0, (char *)view->other_data,
1216 view->m_width, view->m_height,
1217 bitmap_pad,
1218 view->line_bytes);
1219
1220 if (view->x->color) {
1221 view->data8 = view->data;
1222 } else {
1223 view->data8 = view->other_data;
1224 }
1225 }
1226 }
1227}
1228
1229
1230DoPanBy(struct SimView *view, int dx, int dy)
1231{
1232 DoPanTo(view, view->pan_x + dx, view->pan_y + dy);
1233}
1234
1235
1236DoPanTo(struct SimView *view, int x, int y)
1237{
1238 if (view->class != Editor_Class) {
1239 return;
1240 }
1241
1242 if (x < 0) x = 0;
1243 if (y < 0) y = 0;
1244 if (x > view->i_width) x = view->i_width - 1;
1245 if (y > view->i_height) y = view->i_height - 1;
1246 if ((view->pan_x != x) ||
1247 (view->pan_y != y)) {
1248 view->pan_x = x;
1249 view->pan_y = y;
1250 DoAdjustPan(view);
1251 }
1252}
1253
1254/* #define DEBUG_PAN */
1255
1256DoAdjustPan(struct SimView *view)
1257{
1258 int ww2 = view->w_width >>1, wh2 = view->w_height >>1;
1259 int px = view->pan_x, py = view->pan_y;
1260 int last_tile_x = view->tile_x, last_tile_y = view->tile_y;
1261 int last_tile_width = view->tile_width, last_tile_height = view->tile_height;
1262 int total_width = view->m_width >>4, total_height = view->m_height >>4;
1263//fprintf(stderr, "DoAdjustPan\n");
1264
1265#ifdef DEBUG_PAN
1266 printf("AdjustPan window %d %d ww2 %d wh2 %d pan %d %d\n",
1267 view->w_width, view->w_height, ww2, wh2, px, py);
1268 printf(" last tile %d %d %d %d\n",
1269 last_tile_x, last_tile_y, last_tile_width, last_tile_height);
1270#endif
1271
1272 if ((view->tile_x = ((px - ww2) >>4)) < 0)
1273 view->tile_x = 0;
1274 if ((view->tile_y = ((py - wh2) >>4)) < 0)
1275 view->tile_y = 0;
1276
1277#ifdef DEBUG_PAN
1278 printf(" now tile %d %d\n", view->tile_x, view->tile_y);
1279#endif
1280
1281 view->tile_width = ((15 + px + ww2) >>4);
1282 view->tile_height = ((15 + py + wh2) >>4);
1283
1284#ifdef DEBUG_PAN
1285 printf(" outer tile %d %d\n", view->tile_width, view->tile_height);
1286#endif
1287
1288 if (view->tile_width > (view->i_width >>4))
1289 view->tile_width = (view->i_width >>4);
1290 view->tile_width -= view->tile_x;
1291 if (view->tile_height > (view->i_height >>4))
1292 view->tile_height = (view->i_height >>4);
1293 view->tile_height -= view->tile_y;
1294
1295#ifdef DEBUG_PAN
1296 printf(" tile size %d %d\n", view->tile_width, view->tile_height);
1297#endif
1298
1299 if (view->tile_width > (view->m_width >>4))
1300 view->tile_width = (view->m_width >>4);
1301 if (view->tile_height > (view->m_height >>4))
1302 view->tile_height = (view->m_height >>4);
1303
1304#ifdef DEBUG_PAN
1305 printf(" clipped size %d %d\n", view->tile_width, view->tile_height);
1306 printf(" maximum size %d %d\n", view->m_width >>4, view->m_height >>4);
1307#endif
1308
1309 view->screen_x = (ww2 - px) + (view->tile_x <<4);
1310 view->screen_y = (wh2 - py) + (view->tile_y <<4);
1311 view->screen_width = (view->tile_width <<4);
1312 view->screen_height = (view->tile_height <<4);
1313
1314#ifdef DEBUG_PAN
1315 printf(" screen %d %d %d %d\n",
1316 view->screen_x, view->screen_y,
1317 view->screen_width, view->screen_height);
1318#endif
1319
1320 view->overlay_mode = 0;
1321// view->skip = 0;
1322 view->invalid = 1;
1323 if (SimSpeed == 0) {
1324 EventuallyRedrawView(view);
1325 }
1326/* InvalidateEditors(); */
1327 if (view->show_me) {
1328 RedrawMaps();
1329 }
1330/* FixMicropolisTimer(); */
1331
1332 { int dx = last_tile_x - view->tile_x,
1333 dy = last_tile_y - view->tile_y;
1334 short **want = view->other_tiles,
1335 **have = view->tiles;
1336
1337#ifdef DEBUG_PAN
1338 printf("scrolling %d %d\n", dx, dy);
1339#endif
1340
1341 if ((dx != 0) || (dy != 0)) {
1342 int row, col, x, y,
1343 width = view->tile_width,
1344 height = view->tile_height;
1345
1346 for (col = 0; col < width; col++)
1347 memcpy(want[col], have[col], (height * sizeof(short)));
1348
1349 for (col = 0; col < total_width; col++) {
1350 x = col - dx;
1351 for (row = 0; row < total_height; row++) {
1352 y = row - dy;
1353 if ((x >= 0) && (x < width) &&
1354 (y >= 0) && (y < height)) {
1355 have[col][row] = want[x][y];
1356 } else {
1357 have[col][row] = -1;
1358 }
1359 }
1360 }
1361
1362 XCopyArea(view->x->dpy, view->pixmap, view->pixmap, view->x->gc,
1363 0, 0, view->tile_width <<4, view->tile_height <<4,
1364 dx <<4, dy <<4);
1365
1366 if (view->type == X_Mem_View) {
1367 XSync(view->x->dpy, False);
1368 }
1369 }
1370 }
1371}
1372
1373
1374AllocTiles(SimView *view)
1375{
1376 int row, col;
1377 short **have, **want;
1378 int w = view->m_width / 16, h = view->m_height / 16;
1379 int n = (w + 1) * sizeof (short *);
1380
1381 if (view->tiles)
1382 FreeTiles(view);
1383
1384 have = view->tiles =
1385 (short **)ckalloc(n);
1386
1387 want = view->other_tiles =
1388 (short **)ckalloc(n);
1389
1390 have[w] = want[w] = NULL;
1391
1392 n = h * sizeof(short);
1393 for (col = 0; col < w; col++) {
1394
1395 have[col] = (short *)ckalloc(n);
1396 want[col] = (short *)ckalloc(n);
1397 for (row = 0; row < h; row++) {
1398 have[col][row] = -1;
1399 want[col][row] = -1;
1400 }
1401 }
1402}
1403
1404
1405FreeTiles(SimView *view)
1406{
1407 int col;
1408
1409 for (col = 0; view->tiles[col] != NULL; col++) {
1410 ckfree ((char *)view->tiles[col]);
1411 ckfree ((char *)view->other_tiles[col]);
1412 }
1413 ckfree ((char *)view->tiles);
1414 view->tiles = NULL;
1415 ckfree ((char *)view->other_tiles);
1416 view->other_tiles = NULL;
1417}
1418
1419
1420#define POINT_BATCH 32
1421
1422Ink *OldInk = NULL;
1423
1424
1425/* XXX: todo: ink locking so someone doesn't erase ink that's being drawn */
1426
1427Ink *
1428NewInk()
1429{
1430 Ink *ink;
1431
1432 if (OldInk) {
1433 ink = OldInk;
1434 OldInk = OldInk->next;
1435 } else {
1436 ink = (Ink *)ckalloc(sizeof(Ink));
1437 ink->maxlength = POINT_BATCH;
1438 ink->points = (XPoint *)ckalloc(POINT_BATCH * sizeof(XPoint));
1439 }
1440 ink->length = 0;
1441 ink->color = COLOR_WHITE;
1442 ink->next = NULL;
1443 ink->left = ink->right = ink->top = ink->bottom =
1444 ink->last_x = ink->last_y = -1;
1445 return (ink);
1446}
1447
1448
1449FreeInk(Ink *ink)
1450{
1451 ink->next = OldInk;
1452 OldInk = ink;
1453}
1454
1455
1456StartInk(Ink *ink, int x, int y)
1457{
1458 ink->length = 1;
1459 ink->left = ink->right = ink->last_x = ink->points[0].x = x;
1460 ink->top = ink->bottom = ink->last_y = ink->points[0].y = y;
1461}
1462
1463
1464AddInk(Ink *ink, int x, int y)
1465{
1466 int dx = x - ink->last_x;
1467 int dy = y - ink->last_y;
1468
1469 if ((dx != 0) || (dy != 0)) {
1470/*
1471 if (ink->length > 1) {
1472 if ((dx == 0) &&
1473 (ink->points[ink->length - 1].x == 0) &&
1474 ((ink->points[ink->length - 1].y < 0) ?
1475 (dy < 0) : (dy > 0))) {
1476 ink->points[ink->length - 1].y += dy;
1477 goto ADJUST;
1478 } else if ((dy == 0) &&
1479 (ink->points[ink->length - 1].y == 0) &&
1480 ((ink->points[ink->length - 1].x < 0) ?
1481 (dx < 0) : (dx > 0))) {
1482 ink->points[ink->length - 1].x += dx;
1483 goto ADJUST;
1484 }
1485 }
1486*/
1487
1488 if (ink->length >= ink->maxlength) {
1489 ink->maxlength += POINT_BATCH;
1490 ink->points = (XPoint *)realloc((void *)ink->points,
1491 ink->maxlength * sizeof(XPoint));
1492 }
1493 ink->points[ink->length].x = dx;
1494 ink->points[ink->length].y = dy;
1495 ink->length++;
1496
1497 ADJUST:
1498 if (x < ink->left)
1499 ink->left = x;
1500 if (x > ink->right)
1501 ink->right = x;
1502 if (y < ink->top)
1503 ink->top = y;
1504 if (y > ink->bottom)
1505 ink->bottom = y;
1506
1507 { int left, right, top, bottom;
1508 SimView *view;
1509
1510 if (ink->last_x < x) { left = ink->last_x; right = x; }
1511 else { left = x; right = ink->last_x; }
1512 if (ink->last_y < y) { top = ink->last_y; bottom = y; }
1513 else { top = y; bottom = ink->last_y; }
1514
1515 left -= 5; right += 5; top -= 5; bottom += 5;
1516
1517 for (view = sim->editor; view != NULL; view = view->next) {
1518 int vleft, vtop;
1519
1520 if ((right >= (vleft = view->pan_x - (view->w_width / 2))) &&
1521 (left <= vleft + view->w_width) &&
1522 (bottom >= (vtop = view->pan_y - (view->w_height / 2))) &&
1523 (top <= vtop + view->w_height)) {
1524 /* XXX: do studly incremental update instead */
1525 view->overlay_mode = 0;
1526 EventuallyRedrawView(view);
1527 }
1528 }
1529 }
1530 ink->last_x = x; ink->last_y = y;
1531 }
1532}
1533
1534
1535EraseOverlay()
1536{
1537 Ink *ink;
1538
1539 while (sim->overlay) {
1540 ink = sim->overlay;
1541 sim->overlay = ink->next;
1542 FreeInk(ink);
1543 }
1544}
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