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Fix for shared memory leak by Kurt Miller.
[micropolis] / src / sim / w_x.c
... / ...
CommitLineData
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 if (xd->visual->red_mask == 0x7c00) { \
331 xd->pixels[i] = \
332 (((color->red >> (8 + 3)) & 0x1f) << (5 + 5)) | \
333 (((color->green >> (8 + 2)) & 0x1f) << (5)) | \
334 (((color->blue >> (8 + 3)) & 0x1f) << (0)); \
335 } else { \
336 (((color->blue >> (8 + 3)) & 0x1f) << (5 + 5)) | \
337 (((color->green >> (8 + 2)) & 0x1f) << (5)) | \
338 (((color->red >> (8 + 3)) & 0x1f) << (0)); \
339 } \
340 break; \
341 case 16: \
342 if (xd->visual->red_mask == 0xf800) { \
343 xd->pixels[i] = \
344 (((color->red >> (8 + 3)) & 0x1f) << (6 + 5)) | \
345 (((color->green >> (8 + 2)) & 0x3f) << (5)) | \
346 (((color->blue >> (8 + 3)) & 0x1f) << (0)); \
347 } else { \
348 xd->pixels[i] = \
349 (((color->blue >> (8 + 3)) & 0x1f) << (6 + 5)) | \
350 (((color->green >> (8 + 2)) & 0x3f) << (5)) | \
351 (((color->red >> (8 + 3)) & 0x1f) << (0)); \
352 } \
353 break; \
354 case 24: \
355 case 32: \
356 if (xd->visual->red_mask == 0xff0000) { \
357 xd->pixels[i] = \
358 ((color->red & 0xff) << 16) | \
359 ((color->green & 0xff) << 8) | \
360 ((color->blue & 0xff) << 0); \
361 } else { \
362 xd->pixels[i] = \
363 ((color->blue & 0xff) << 16) | \
364 ((color->green & 0xff) << 8) | \
365 ((color->red & 0xff) << 0); \
366 } \
367 break; \
368 } \
369 } \
370 }
371
372 if ((xd->depth == 8) &&
373 (Tk_DefaultColormap(xd->screen) ==
374 DefaultColormapOfScreen(xd->screen))) {
375 xd->pixels[COLOR_WHITE] = WhitePixelOfScreen(xd->screen);
376 xd->pixels[COLOR_BLACK] = BlackPixelOfScreen(xd->screen);
377 } else {
378 GETCOLOR(COLOR_WHITE, "#ffffff");
379 GETCOLOR(COLOR_BLACK, "#000000");
380 }
381
382 GETCOLOR(COLOR_YELLOW, "#ffff00");
383 GETCOLOR(COLOR_ORANGE, "#ff7f00");
384 GETCOLOR(COLOR_RED, "#ff0000");
385 GETCOLOR(COLOR_DARKRED, "#bf0000");
386 GETCOLOR(COLOR_DARKBLUE, "#0000e6");
387 GETCOLOR(COLOR_LIGHTBLUE, "#6666e6");
388 GETCOLOR(COLOR_BROWN, "#cc4c4c");
389 GETCOLOR(COLOR_LIGHTGREEN, "#00e600");
390 GETCOLOR(COLOR_DARKGREEN, "#007f00");
391 GETCOLOR(COLOR_OLIVE, "#997f4c");
392 GETCOLOR(COLOR_LIGHTBROWN, "#cc7f66");
393 GETCOLOR(COLOR_LIGHTGRAY, "#bfbfbf");
394 GETCOLOR(COLOR_MEDIUMGRAY, "#7f7f7f");
395 GETCOLOR(COLOR_DARKGRAY, "#3f3f3f");
396
397 if (!GotColor) {
398 fprintf(stderr,
399 "Oh, dear. There don't seem to be enough free colors on X display \"%s\".\n",
400 xd->display);
401 fprintf(stderr,
402 "Micropolis will try to run anyway, but might look pretty weird!\n");
403 }
404 } else { /* Black and white screen */
405 int white = WhitePixelOfScreen(xd->screen);
406 int black = BlackPixelOfScreen(xd->screen);
407
408 xd->pixels[COLOR_WHITE] = white;
409 xd->pixels[COLOR_BLACK] = black;
410
411 xd->pixels[COLOR_YELLOW] = white;
412 xd->pixels[COLOR_ORANGE] = white;
413 xd->pixels[COLOR_RED] = white;
414 xd->pixels[COLOR_DARKRED] = black;
415 xd->pixels[COLOR_DARKBLUE] = black;
416 xd->pixels[COLOR_LIGHTBLUE] = white;
417 xd->pixels[COLOR_BROWN] = black;
418 xd->pixels[COLOR_LIGHTGREEN] = white;
419 xd->pixels[COLOR_DARKGREEN] = black;
420 xd->pixels[COLOR_OLIVE] = black;
421 xd->pixels[COLOR_LIGHTBROWN] = white;
422 xd->pixels[COLOR_LIGHTGRAY] = white;
423 xd->pixels[COLOR_MEDIUMGRAY] = white;
424 xd->pixels[COLOR_DARKGRAY] = black;
425 }
426
427 xd->gc = Tk_DefaultGC(xd->screen);
428 XSetForeground(xd->dpy, xd->gc, xd->pixels[COLOR_BLACK]);
429 XSetBackground(xd->dpy, xd->gc, xd->pixels[COLOR_WHITE]);
430 XSetLineAttributes(xd->dpy, xd->gc,
431 1, LineSolid, CapButt, JoinMiter);
432 XSetGraphicsExposures(xd->dpy, xd->gc, False);
433
434#ifndef MSDOS
435 { int major, minor, event, error, pixmaps;
436 if (WireMode ||
437 (XQueryExtension(xd->dpy, "MIT-SHM", /* Jeez! */
438 &major, &event, &error) != True) ||
439 (XShmQueryVersion(xd->dpy,
440 &major, &minor, &pixmaps) != True)) {
441 fprintf(stderr,
442 "Darn, X display \"%s\" doesn't support the shared memory extension.\n",
443 xd->display);
444 xd->shared = 0;
445 } else {
446 if (!pixmaps) {
447 fprintf(stderr,
448 "Darn, X display \"%s\" claims to support the shared memory extension,\n",
449 xd->display);
450 fprintf(stderr,
451 "but is too lame to support shared memory pixmaps, so Micropolis will run slower.\n");
452 fprintf(stderr,
453 "Please complain to your X server vendor, %s\n",
454 XServerVendor(xd->dpy));
455 xd->shared = -1;
456 } else {
457 fprintf(stderr,
458 "Cool, I found the shared memory extension!\n");
459 fprintf(stderr,
460 "Disabled SHM, because it is currently broken!\n");
461 xd->shared = 0;
462 }
463 }
464 }
465#else
466 xd->shared = 0;
467#endif
468
469 xd->request = -1;
470 xd->last_request_read = -1;
471 xd->big_tile_pixmap = None;
472 xd->objects = NULL;
473 xd->overlay_gc = NULL;
474 xd->gray25_stipple = None;
475 xd->gray50_stipple = None;
476 xd->gray75_stipple = None;
477 xd->vert_stipple = None;
478 xd->horiz_stipple = None;
479 xd->diag_stipple = None;
480
481 xd->big_tile_image = xd->small_tile_image = NULL;
482
483 xd->next = XDisplays; XDisplays = xd;
484 }
485
486 return (xd);
487}
488
489
490IncRefDisplay(XDisplay *xd)
491{
492 xd->references++;
493}
494
495
496DecRefDisplay(XDisplay *xd)
497{
498 if ((--xd->references) == 0) {
499 /* I'd blow it away, but tk may still be using the display */
500 }
501}
502
503
504SimView *
505InitNewView(SimView *view, char *title, int class, int w, int h)
506{
507 int type, i;
508 int test = 1;
509 int d = 8;
510 unsigned long valuemask = 0;
511 char *t;
512 struct XDisplay *xd;
513 XGCValues values;
514 XColor rgb, *color;
515
516 t = (char *)ckalloc(strlen(title) + 1);
517 strcpy(t, title);
518
519 view->next = NULL;
520 view->title = t;
521 view->type = -1;
522 view->class = class;
523 view->bigtiles = view->smalltiles = NULL;
524 view->pixels = NULL;
525 view->line_bytes = 0;
526 view->line_bytes8 = 0;
527 view->pixel_bytes = 0;
528 view->depth = 0;
529 view->data = NULL;
530 view->data8 = NULL;
531 view->visible = 0;
532 view->invalid = 0;
533 view->skips = view->skip = 0;
534 view->update = 0;
535 view->map_state = ALMAP;
536 view->show_editors = 1;
537 view->tool_showing = 0;
538 view->tool_mode = 0;
539 view->tool_x = view->tool_y = 0;
540 view->tool_x_const = view->tool_y_const = -1;
541 view->tool_state = dozeState;
542 view->tool_state_save = -1;
543 view->super_user = 0;
544 view->show_me = 1;
545 view->dynamic_filter = 0;
546 view->auto_scroll_token = 0;
547 view->tool_event_time = 0;
548 view->tool_last_event_time = 0;
549 view->w_x = view->w_y = 0;
550 view->w_width = view->w_height = 16;
551 view->m_width = view->m_height = 0;
552 view->i_width = w; view->i_height = h;
553 view->pan_x = view->pan_y = 0;
554 view->tile_x = view->tile_y = 0;
555 view->tile_width = view->tile_height = 0;
556 view->screen_x = view->screen_y = 0;
557 view->screen_width = view->screen_height = 0;
558 view->last_x = view->last_y = view->last_button = 0;
559 view->track_info = NULL;
560 view->message_var = NULL;
561
562/* This stuff was initialized in our caller (SimViewCmd) */
563/* view->tkwin = NULL; */
564/* view->interp = NULL; */
565/* view->flags = 0; */
566
567 view->x = NULL;
568 view->shminfo = NULL;
569 view->tiles = NULL;
570 view->other_tiles = NULL;
571 view->image = NULL;
572 view->other_image = NULL;
573 view->other_data = NULL;
574 view->pixmap = None;
575 view->pixmap2 = None;
576 view->overlay_pixmap = None;
577 view->overlay_valid = 0;
578 view->fontPtr = NULL;
579 view->updates = 0;
580 view->update_real = view->update_user = view->update_system = 0.0;
581 view->update_context = 0;
582 view->auto_goto = 0;
583 view->auto_going = 0;
584 view->auto_x_goal = view->auto_x_goal = 0;
585 view->auto_speed = 75;
586 view->follow = NULL;
587 view->sound = 1;
588 view->width = 0; view->height = 0;
589 view->show_overlay = 1;
590 view->overlay_mode = 0;
591
592 view->x = FindXDisplay(view->tkwin);
593 IncRefDisplay(view->x);
594
595 /* view->x->shared is 1 if the shared memory extension is present and
596 supports shared memory pixmaps, and -1 if it is present but doesn't. */
597 if (view->x->shared != 1) {
598 view->type = X_Wire_View;
599 } else {
600 view->type = X_Mem_View;
601 }
602
603 view->x->needs_swap = !(*(unsigned char*) (&test));
604 view->x->x_big_endian = (ImageByteOrder(view->x->dpy) == MSBFirst);
605
606
607 GetPixmaps(view->x);
608 view->pixels = view->x->pixels;
609
610 if (w == EDITOR_W) w = 256; /* XXX */
611 if (h == EDITOR_H) h = 256; /* XXX */
612
613 view->pan_x = w / 2; view->pan_y = h / 2;
614 DoResizeView(view, w, h);
615
616 GetViewTiles(view);
617
618 return (view);
619}
620
621
622DestroyView(SimView *view)
623{
624 SimView **vp;
625
626 CancelRedrawView(view);
627
628 for (vp = ((view->class == Editor_Class) ?
629 (&sim->editor) : (&sim->map));
630 (*vp) != NULL;
631 vp = &((*vp)->next)) {
632 if ((*vp) == view) {
633 (*vp) = view->next;
634 if (view->class == Editor_Class)
635 sim->editors--;
636 else
637 sim->maps--;
638
639 break;
640 }
641 }
642
643 if (view->title != NULL) {
644 ckfree (view->title);
645 view->title = NULL;
646 }
647
648 if (view->pixmap != None) {
649 XFreePixmap(view->x->dpy, view->pixmap);
650 view->pixmap = None;
651 }
652
653 if (view->pixmap2 != None) {
654 XFreePixmap(view->x->dpy, view->pixmap2);
655 view->pixmap2 = None;
656 }
657
658 if (view->overlay_pixmap != None) {
659 XFreePixmap(view->x->dpy, view->overlay_pixmap);
660 view->overlay_pixmap = None;
661 }
662
663 if (view->auto_scroll_token) {
664 Tk_DeleteTimerHandler(view->auto_scroll_token);
665 view->auto_scroll_token = 0;
666 }
667
668#ifndef MSDOS
669 if (view->shminfo) {
670 XShmDetach(view->x->dpy, view->shminfo);
671 shmdt(view->shminfo->shmaddr);
672 shmctl(view->shminfo->shmid, IPC_RMID, 0);
673 ckfree(view->shminfo);
674 view->shminfo = NULL;
675 if (view->image) {
676 view->image->data = NULL;
677 view->data = NULL;
678 XDestroyImage(view->image);
679 view->image = NULL;
680 }
681 } else {
682#endif
683 if (view->image) {
684 if (view->image->data) {
685 ckfree(view->image->data);
686 view->image->data = NULL;
687 }
688 view->data = NULL;
689 XDestroyImage(view->image);
690 view->image = NULL;
691 }
692#ifndef MSDOS
693 }
694#endif
695
696 if (view->other_image) {
697 if (view->other_image->data) {
698 ckfree(view->other_image->data);
699 view->other_image->data = NULL;
700 }
701 view->other_data = NULL;
702 XDestroyImage(view->other_image);
703 view->other_image = NULL;
704 }
705
706 if (view->tiles)
707 FreeTiles(view);
708
709 DecRefDisplay(view->x);
710
711 ckfree((char *) view);
712}
713
714
715unsigned char *
716AllocPixels(int len, unsigned char pixel)
717{
718 int i;
719 unsigned char *data, *cp;
720
721 cp = data = (unsigned char *)ckalloc(len);
722 for (i = len; i > 0; i--) {
723 *(cp++) = pixel;
724 }
725
726 return (data);
727}
728
729
730DoResizeView(SimView *view, int w, int h)
731{
732 int resize = 0;
733
734 view->w_width = w;
735 view->w_height = h;
736
737 if (view->class == Map_Class) { /* Map_Class */
738 view->m_width = w;
739 view->m_height = h;
740
741 if (view->pixmap2 == None) {
742
743 view->pixmap2 = XCreatePixmap(view->x->dpy, view->x->root,
744 w, h, view->x->depth);
745 if (view->pixmap2 == None) {
746 fprintf(stderr,
747 "Sorry, Micropolis can't create a pixmap on X display \"%s\"!\n",
748 view->x->display);
749 sim_exit(1); // Just sets tkMustExit and ExitReturn
750 return;
751 }
752 }
753
754 } else { /* Editor_Class */
755
756 if ((w = (w + 31) & (~15)) > view->m_width)
757 view->m_width = w, resize++;
758 if ((h = (h + 31) & (~15)) > view->m_height)
759 view->m_height = h, resize++;
760
761 if (resize || (view->pixmap2 == None)) {
762 if (view->pixmap2 != None) {
763 XFreePixmap(view->x->dpy, view->pixmap2);
764 view->pixmap2 = None;
765 }
766 view->pixmap2 = XCreatePixmap(view->x->dpy, view->x->root,
767 view->m_width, view->m_height,
768 view->x->depth);
769 if (view->pixmap2 == None) {
770 fprintf(stderr,
771 "Sorry, Micropolis couldn't create a pixmap on X display \"%s\"!\n",
772 view->x->display);
773 sim_exit(1); // Just sets tkMustExit and ExitReturn
774 return;
775 }
776 }
777
778 if (resize || (view->overlay_pixmap == None)) {
779 view->overlay_mode = 0;
780 if (view->overlay_pixmap != None) {
781 XFreePixmap(view->x->dpy, view->overlay_pixmap);
782 view->overlay_pixmap = None;
783 }
784 view->overlay_pixmap = XCreatePixmap(view->x->dpy, view->x->root,
785 view->m_width, view->m_height,
786 1);
787 if (view->overlay_pixmap == None) {
788 fprintf(stderr,
789 "Sorry, Micropolis couldn't create another pixmap on X display \"%s\".\n",
790 view->x->display);
791 sim_exit(1); // Just sets tkMustExit and ExitReturn
792 return;
793 }
794 if (view->x->overlay_gc == NULL) {
795 unsigned long valuemask = 0;
796 XGCValues values;
797
798 view->x->overlay_gc =
799 XCreateGC(view->x->dpy, view->overlay_pixmap, valuemask, &values);
800 XSetForeground(view->x->dpy, view->x->overlay_gc, 0);
801 XSetBackground(view->x->dpy, view->x->overlay_gc, 1);
802 XSetLineAttributes(view->x->dpy, view->x->overlay_gc,
803 1, LineSolid, CapButt, JoinMiter);
804 XSetGraphicsExposures(view->x->dpy, view->x->overlay_gc, False);
805 }
806 }
807
808 }
809
810#ifndef MSDOS
811 if (view->type != X_Mem_View) {
812 goto SPRING_FORWARD;
813 }
814
815 if (resize || (view->image == NULL)) {
816 if (view->shminfo && view->image) {
817 if (view->pixmap != None) {
818 XFreePixmap(view->x->dpy, view->pixmap);
819 view->pixmap = None;
820 }
821 XShmDetach(view->x->dpy, view->shminfo);
822 shmdt(view->shminfo->shmaddr);
823 shmctl(view->shminfo->shmid, IPC_RMID, 0);
824 view->image->data = NULL;
825 if (view->data == view->data8)
826 view->data8 = NULL;
827 view->data = NULL;
828 XDestroyImage(view->image);
829 view->image = NULL;
830 }
831
832#if 0
833 /* XShmPixmapFormat is documented but does not exist !!! */
834 if (XShmPixmapFormat(view->x->dpy) != ZPixmap) {
835 fprintf(stderr,
836 "Darn, display \"%s\" has the wrong shared memory format.\n",
837 view->x->display);
838 goto FALL_BACK;
839 }
840#endif
841
842 if (!view->shminfo) {
843 view->shminfo = (XShmSegmentInfo *)ckalloc(sizeof (XShmSegmentInfo));
844 }
845
846 view->image =
847 XShmCreateImage(view->x->dpy, view->x->visual, view->x->depth,
848 view->x->color ? ZPixmap : XYBitmap,
849 NULL, view->shminfo,
850 view->m_width, view->m_height);
851
852 view->line_bytes = view->image->bytes_per_line;
853
854 switch (view->x->depth) {
855
856 case 1:
857 view->pixel_bytes = 0;
858 view->depth = 1;
859 break;
860
861 case 8:
862 view->pixel_bytes = 1;
863 view->depth = 8;
864 break;
865
866 case 15:
867 view->pixel_bytes = 2;
868 view->depth = 15;
869 break;
870
871 case 16:
872 view->pixel_bytes = 2;
873 view->depth = 16;
874 break;
875
876 case 24:
877 /* XXX: TODO: 24 and 32 bit support */
878 view->pixel_bytes = 4;
879 //view->pixel_bytes = 3;
880 view->depth = 24;
881 break;
882
883 case 32:
884 /* XXX: TODO: 24 and 32 bit support */
885 view->pixel_bytes = 4;
886 view->depth = 32;
887 break;
888
889 default:
890 view->pixel_bytes = 0;
891 view->depth = 0;
892 break;
893
894 } // switch
895
896 view->shminfo->shmid = shmget(IPC_PRIVATE,
897 (view->line_bytes *
898 view->m_height),
899 (IPC_CREAT | 0777));
900 if (view->shminfo->shmid < 0) {
901 perror("shmget");
902 fprintf(stderr,
903 "Darn, Micropolis can't share memory with X display \"%s\".\n",
904 view->x->display);
905 goto FALL_BACK;
906 }
907
908 view->data = (unsigned char *)shmat(view->shminfo->shmid, 0, 0);
909 if ((int)view->data == -1) {
910 perror("shmat");
911 fprintf(stderr,
912 "Darn, Micropolis can't find any memory to share with display \"%s\".\n",
913 view->x->display);
914 goto FALL_BACK;
915 }
916
917 view->image->data = (char *)view->data;
918 view->shminfo->shmaddr = (char *)view->data;
919 view->shminfo->readOnly = False;
920
921 { int (*old)();
922 int result;
923 int attached = 0;
924 GotXError = 0;
925 old = XSetErrorHandler(CatchXError);
926
927 result =
928 XShmAttach(view->x->dpy, view->shminfo);
929 if (result == 0) {
930 fprintf(stderr,
931 "Darn, the X display \"%s\" can't access Micropolis's shared memory.\n",
932 view->x->display);
933 GotXError = 1;
934 }
935
936 XSync(view->x->dpy, False);
937
938 if (!GotXError) {
939 attached = 1;
940 view->pixmap = XShmCreatePixmap(view->x->dpy, view->x->root,
941 view->data, view->shminfo,
942 view->m_width, view->m_height,
943 view->x->depth);
944 XSync(view->x->dpy, False);
945
946 if (GotXError ||
947 (view->pixmap == None)) {
948 fprintf(stderr,
949 "Darn, Micropolis couldn't get a shared memory pixmap on X display \"%s\".\n",
950 view->x->display);
951 GotXError = 1;
952 }
953 }
954
955 XSetErrorHandler(old);
956
957 if (GotXError) {
958 view->pixmap = None;
959 if (attached) {
960 XShmDetach(view->x->dpy, view->shminfo);
961 } // if
962 result = shmdt(view->shminfo->shmaddr);
963 result = shmctl(view->shminfo->shmid, IPC_RMID, 0);
964 ckfree(view->shminfo);
965 view->shminfo = NULL;
966 if (view->image) {
967 view->image->data = NULL;
968 view->data = NULL;
969 XDestroyImage(view->image);
970 view->image = NULL;
971 }
972 goto FALL_BACK;
973 }
974
975 if (view->x->color) {
976 XSetForeground(view->x->dpy, view->x->gc,
977 view->pixels[COLOR_LIGHTBROWN]);
978 } else {
979 XSetForeground(view->x->dpy, view->x->gc,
980 view->pixels[COLOR_WHITE]);
981 }
982
983 XFillRectangle(view->x->dpy, view->pixmap, view->x->gc,
984 0, 0, view->m_width, view->m_height);
985 }
986 }
987
988 goto FINISH;
989
990 FALL_BACK:
991
992 fprintf(stderr,
993 "Falling back to the X network protocol on display \"%s\"...\n",
994 view->x->display);
995#endif
996
997 view->x->shared = 0;
998 view->type = X_Wire_View;
999 if (view->pixmap != None) {
1000 XFreePixmap(view->x->dpy, view->pixmap);
1001 view->pixmap = None;
1002 }
1003#ifndef MSDOS
1004 if (view->shminfo) {
1005 if (view->shminfo->shmid >= 0) {
1006 if (view->shminfo->shmaddr) {
1007 shmdt(view->shminfo->shmaddr);
1008 }
1009 shmctl(view->shminfo->shmid, IPC_RMID, 0);
1010 }
1011 ckfree((char *)view->shminfo);
1012 view->shminfo = NULL;
1013 }
1014#endif
1015 if (view->image) {
1016 view->image->data = NULL;
1017 XDestroyImage(view->image);
1018 view->image = NULL;
1019 }
1020 view->data = NULL;
1021 view->line_bytes = 0;
1022 view->pixel_bytes = 0;
1023 view->depth = 0;
1024
1025 SPRING_FORWARD:
1026
1027 if (resize || (view->pixmap == None)) {
1028 if (view->pixmap != None) {
1029 XFreePixmap(view->x->dpy, view->pixmap);
1030 view->pixmap = None;
1031 }
1032 view->pixmap = XCreatePixmap(view->x->dpy, view->x->root,
1033 view->m_width, view->m_height,
1034 view->x->depth);
1035 if (view->pixmap == None) {
1036 fprintf(stderr,
1037 "Sorry, Micropolis can't create pixmap on X display \"%s\".\n",
1038 view->x->display);
1039 sim_exit(1); // Just sets tkMustExit and ExitReturn
1040 return;
1041 }
1042 if (view->x->color) {
1043 XSetForeground(view->x->dpy, view->x->gc,
1044 view->pixels[COLOR_LIGHTBROWN]);
1045 } else {
1046 XSetForeground(view->x->dpy, view->x->gc,
1047 view->pixels[COLOR_WHITE]);
1048 }
1049 XFillRectangle(view->x->dpy, view->pixmap, view->x->gc,
1050 0, 0, view->m_width, view->m_height);
1051 }
1052
1053 FINISH:
1054
1055 if (view->class == Editor_Class) {
1056
1057 AllocTiles(view);
1058 DoAdjustPan(view);
1059
1060 } else if (view->class == Map_Class) {
1061
1062 if (view->type == X_Mem_View) { /* Memory Map */
1063
1064 if (view->x->color) {
1065
1066 /* Color, Shared Memory */
1067
1068 view->data8 = view->data;
1069 view->line_bytes8 = view->line_bytes; /* XXX: ??? */
1070
1071 switch (view->x->depth) {
1072
1073 case 8:
1074 view->pixel_bytes = 1;
1075 view->depth = 8;
1076 break;
1077
1078 case 15:
1079 view->pixel_bytes = 2;
1080 view->depth = 15;
1081 break;
1082
1083 case 16:
1084 view->pixel_bytes = 2;
1085 view->depth = 16;
1086 break;
1087
1088 case 24:
1089 /* XXX: TODO: 24 and 32 bit support */
1090 view->pixel_bytes = 4;
1091 //view->pixel_bytes = 3;
1092 view->depth = 24;
1093 break;
1094
1095 case 32:
1096 /* XXX: TODO: 24 and 32 bit support */
1097 view->pixel_bytes = 4;
1098 view->depth = 32;
1099 break;
1100
1101 default:
1102 view->pixel_bytes = 0;
1103 view->depth = 0;
1104 break;
1105
1106 } // switch
1107
1108 } else {
1109
1110 /* Black and White, Shared Memory */
1111
1112 if (view->other_image != NULL) {
1113 XDestroyImage(view->other_image);
1114 }
1115
1116 view->line_bytes8 = view->m_width; /* XXX: fix depth */
1117 view->pixel_bytes = 0;
1118 view->depth = 1;
1119
1120 view->other_data = view->data8 =
1121 AllocPixels(view->m_height * view->line_bytes8, /* XXX: fix depth */
1122 view->pixels[COLOR_WHITE]);
1123 view->other_image =
1124 XCreateImage(view->x->dpy, view->x->visual, 8, /* XXX: fix depth */
1125 ZPixmap, 0, (char *)view->other_data,
1126 view->m_width, view->m_height,
1127 8, view->line_bytes8); /* XXX: fix depth */
1128 }
1129
1130 } else { /* Wire Map */
1131 int bitmap_pad;
1132 int bitmap_depth;
1133
1134 if (view->image != NULL) {
1135 XDestroyImage(view->image);
1136 view->image = NULL;
1137 }
1138
1139 if (view->other_image != NULL) {
1140 XDestroyImage(view->other_image);
1141 view->other_image = NULL;
1142 }
1143
1144 if (view->x->color) {
1145
1146 /* Color, Wire */
1147
1148 switch (view->x->depth) {
1149
1150 case 8:
1151 view->pixel_bytes = 1;
1152 view->depth = 8;
1153 bitmap_pad = 8;
1154 bitmap_depth = 8;
1155 view->line_bytes8 =
1156 ((view->m_width * view->pixel_bytes) + 3) & (~3);
1157 break;
1158
1159 case 15:
1160 view->pixel_bytes = 2;
1161 view->depth = 15;
1162 bitmap_pad = 16;
1163 bitmap_depth = 15;
1164 view->line_bytes8 =
1165 ((view->m_width * view->pixel_bytes) + 3) & (~3);
1166 break;
1167
1168 case 16:
1169 view->pixel_bytes = 2;
1170 view->depth = 16;
1171 bitmap_pad = 16;
1172 bitmap_depth = 16;
1173 view->line_bytes8 =
1174 ((view->m_width * view->pixel_bytes) + 3) & (~3);
1175 break;
1176
1177 case 24:
1178 view->pixel_bytes = 4;
1179 //view->pixel_bytes = 3;
1180 view->depth = 24;
1181 bitmap_depth = 24;
1182 bitmap_pad = 32;
1183 view->line_bytes8 =
1184 ((view->m_width * 4) + 3) & (~3);
1185 break;
1186
1187 case 32:
1188 view->pixel_bytes = 4;
1189 view->depth = 32;
1190 bitmap_pad = 32;
1191 bitmap_depth = 32;
1192 view->line_bytes8 =
1193 ((view->m_width * 4) + 3) & (~3);
1194 break;
1195
1196 default:
1197 assert(0); /* Unknown depth */
1198 break;
1199
1200 } // switch
1201
1202 view->line_bytes =
1203 view->line_bytes8;
1204
1205 } else {
1206
1207 /* Black and White, Wire */
1208
1209 view->pixel_bytes = 0;
1210 view->depth = 1;
1211 view->line_bytes8 =
1212 (view->m_width + 3) & (~3); /* XXX: handle depth */
1213 view->line_bytes =
1214 (view->m_width + 7) >>3;
1215 bitmap_pad = 8;
1216 bitmap_depth = 8;
1217
1218 }
1219
1220 view->data =
1221 AllocPixels(view->m_height * view->line_bytes, 0);
1222 view->image =
1223 XCreateImage(view->x->dpy, view->x->visual,
1224 bitmap_depth,
1225 view->x->color ? ZPixmap : XYBitmap,
1226 0, (char *)view->data,
1227 view->m_width, view->m_height,
1228 bitmap_pad,
1229 view->line_bytes);
1230
1231 view->other_data =
1232 AllocPixels(view->m_height * view->line_bytes8, 0);
1233 view->other_image =
1234 XCreateImage(view->x->dpy, view->x->visual,
1235 bitmap_depth,
1236 ZPixmap,
1237 0, (char *)view->other_data,
1238 view->m_width, view->m_height,
1239 bitmap_pad,
1240 view->line_bytes);
1241
1242 if (view->x->color) {
1243 view->data8 = view->data;
1244 } else {
1245 view->data8 = view->other_data;
1246 }
1247 }
1248 }
1249}
1250
1251
1252DoPanBy(struct SimView *view, int dx, int dy)
1253{
1254 DoPanTo(view, view->pan_x + dx, view->pan_y + dy);
1255}
1256
1257
1258DoPanTo(struct SimView *view, int x, int y)
1259{
1260 if (view->class != Editor_Class) {
1261 return;
1262 }
1263
1264 if (x < 0) x = 0;
1265 if (y < 0) y = 0;
1266 if (x > view->i_width) x = view->i_width - 1;
1267 if (y > view->i_height) y = view->i_height - 1;
1268 if ((view->pan_x != x) ||
1269 (view->pan_y != y)) {
1270 view->pan_x = x;
1271 view->pan_y = y;
1272 DoAdjustPan(view);
1273 }
1274}
1275
1276/* #define DEBUG_PAN */
1277
1278DoAdjustPan(struct SimView *view)
1279{
1280 int ww2 = view->w_width >>1, wh2 = view->w_height >>1;
1281 int px = view->pan_x, py = view->pan_y;
1282 int last_tile_x = view->tile_x, last_tile_y = view->tile_y;
1283 int last_tile_width = view->tile_width, last_tile_height = view->tile_height;
1284 int total_width = view->m_width >>4, total_height = view->m_height >>4;
1285//fprintf(stderr, "DoAdjustPan\n");
1286
1287#ifdef DEBUG_PAN
1288 printf("AdjustPan window %d %d ww2 %d wh2 %d pan %d %d\n",
1289 view->w_width, view->w_height, ww2, wh2, px, py);
1290 printf(" last tile %d %d %d %d\n",
1291 last_tile_x, last_tile_y, last_tile_width, last_tile_height);
1292#endif
1293
1294 if ((view->tile_x = ((px - ww2) >>4)) < 0)
1295 view->tile_x = 0;
1296 if ((view->tile_y = ((py - wh2) >>4)) < 0)
1297 view->tile_y = 0;
1298
1299#ifdef DEBUG_PAN
1300 printf(" now tile %d %d\n", view->tile_x, view->tile_y);
1301#endif
1302
1303 view->tile_width = ((15 + px + ww2) >>4);
1304 view->tile_height = ((15 + py + wh2) >>4);
1305
1306#ifdef DEBUG_PAN
1307 printf(" outer tile %d %d\n", view->tile_width, view->tile_height);
1308#endif
1309
1310 if (view->tile_width > (view->i_width >>4))
1311 view->tile_width = (view->i_width >>4);
1312 view->tile_width -= view->tile_x;
1313 if (view->tile_height > (view->i_height >>4))
1314 view->tile_height = (view->i_height >>4);
1315 view->tile_height -= view->tile_y;
1316
1317#ifdef DEBUG_PAN
1318 printf(" tile size %d %d\n", view->tile_width, view->tile_height);
1319#endif
1320
1321 if (view->tile_width > (view->m_width >>4))
1322 view->tile_width = (view->m_width >>4);
1323 if (view->tile_height > (view->m_height >>4))
1324 view->tile_height = (view->m_height >>4);
1325
1326#ifdef DEBUG_PAN
1327 printf(" clipped size %d %d\n", view->tile_width, view->tile_height);
1328 printf(" maximum size %d %d\n", view->m_width >>4, view->m_height >>4);
1329#endif
1330
1331 view->screen_x = (ww2 - px) + (view->tile_x <<4);
1332 view->screen_y = (wh2 - py) + (view->tile_y <<4);
1333 view->screen_width = (view->tile_width <<4);
1334 view->screen_height = (view->tile_height <<4);
1335
1336#ifdef DEBUG_PAN
1337 printf(" screen %d %d %d %d\n",
1338 view->screen_x, view->screen_y,
1339 view->screen_width, view->screen_height);
1340#endif
1341
1342 view->overlay_mode = 0;
1343// view->skip = 0;
1344 view->invalid = 1;
1345 if (SimSpeed == 0) {
1346 EventuallyRedrawView(view);
1347 }
1348/* InvalidateEditors(); */
1349 if (view->show_me) {
1350 RedrawMaps();
1351 }
1352/* FixMicropolisTimer(); */
1353
1354 { int dx = last_tile_x - view->tile_x,
1355 dy = last_tile_y - view->tile_y;
1356 short **want = view->other_tiles,
1357 **have = view->tiles;
1358
1359#ifdef DEBUG_PAN
1360 printf("scrolling %d %d\n", dx, dy);
1361#endif
1362
1363 if ((dx != 0) || (dy != 0)) {
1364 int row, col, x, y,
1365 width = view->tile_width,
1366 height = view->tile_height;
1367
1368 for (col = 0; col < width; col++)
1369 memcpy(want[col], have[col], (height * sizeof(short)));
1370
1371 for (col = 0; col < total_width; col++) {
1372 x = col - dx;
1373 for (row = 0; row < total_height; row++) {
1374 y = row - dy;
1375 if ((x >= 0) && (x < width) &&
1376 (y >= 0) && (y < height)) {
1377 have[col][row] = want[x][y];
1378 } else {
1379 have[col][row] = -1;
1380 }
1381 }
1382 }
1383
1384 XCopyArea(view->x->dpy, view->pixmap, view->pixmap, view->x->gc,
1385 0, 0, view->tile_width <<4, view->tile_height <<4,
1386 dx <<4, dy <<4);
1387
1388 if (view->type == X_Mem_View) {
1389 XSync(view->x->dpy, False);
1390 }
1391 }
1392 }
1393}
1394
1395
1396AllocTiles(SimView *view)
1397{
1398 int row, col;
1399 short **have, **want;
1400 int w = view->m_width / 16, h = view->m_height / 16;
1401 int n = (w + 1) * sizeof (short *);
1402
1403 if (view->tiles)
1404 FreeTiles(view);
1405
1406 have = view->tiles =
1407 (short **)ckalloc(n);
1408
1409 want = view->other_tiles =
1410 (short **)ckalloc(n);
1411
1412 have[w] = want[w] = NULL;
1413
1414 n = h * sizeof(short);
1415 for (col = 0; col < w; col++) {
1416
1417 have[col] = (short *)ckalloc(n);
1418 want[col] = (short *)ckalloc(n);
1419 for (row = 0; row < h; row++) {
1420 have[col][row] = -1;
1421 want[col][row] = -1;
1422 }
1423 }
1424}
1425
1426
1427FreeTiles(SimView *view)
1428{
1429 int col;
1430
1431 for (col = 0; view->tiles[col] != NULL; col++) {
1432 ckfree ((char *)view->tiles[col]);
1433 ckfree ((char *)view->other_tiles[col]);
1434 }
1435 ckfree ((char *)view->tiles);
1436 view->tiles = NULL;
1437 ckfree ((char *)view->other_tiles);
1438 view->other_tiles = NULL;
1439}
1440
1441
1442#define POINT_BATCH 32
1443
1444Ink *OldInk = NULL;
1445
1446
1447/* XXX: todo: ink locking so someone doesn't erase ink that's being drawn */
1448
1449Ink *
1450NewInk()
1451{
1452 Ink *ink;
1453
1454 if (OldInk) {
1455 ink = OldInk;
1456 OldInk = OldInk->next;
1457 } else {
1458 ink = (Ink *)ckalloc(sizeof(Ink));
1459 ink->maxlength = POINT_BATCH;
1460 ink->points = (XPoint *)ckalloc(POINT_BATCH * sizeof(XPoint));
1461 }
1462 ink->length = 0;
1463 ink->color = COLOR_WHITE;
1464 ink->next = NULL;
1465 ink->left = ink->right = ink->top = ink->bottom =
1466 ink->last_x = ink->last_y = -1;
1467 return (ink);
1468}
1469
1470
1471FreeInk(Ink *ink)
1472{
1473 ink->next = OldInk;
1474 OldInk = ink;
1475}
1476
1477
1478StartInk(Ink *ink, int x, int y)
1479{
1480 ink->length = 1;
1481 ink->left = ink->right = ink->last_x = ink->points[0].x = x;
1482 ink->top = ink->bottom = ink->last_y = ink->points[0].y = y;
1483}
1484
1485
1486AddInk(Ink *ink, int x, int y)
1487{
1488 int dx = x - ink->last_x;
1489 int dy = y - ink->last_y;
1490
1491 if ((dx != 0) || (dy != 0)) {
1492/*
1493 if (ink->length > 1) {
1494 if ((dx == 0) &&
1495 (ink->points[ink->length - 1].x == 0) &&
1496 ((ink->points[ink->length - 1].y < 0) ?
1497 (dy < 0) : (dy > 0))) {
1498 ink->points[ink->length - 1].y += dy;
1499 goto ADJUST;
1500 } else if ((dy == 0) &&
1501 (ink->points[ink->length - 1].y == 0) &&
1502 ((ink->points[ink->length - 1].x < 0) ?
1503 (dx < 0) : (dx > 0))) {
1504 ink->points[ink->length - 1].x += dx;
1505 goto ADJUST;
1506 }
1507 }
1508*/
1509
1510 if (ink->length >= ink->maxlength) {
1511 ink->maxlength += POINT_BATCH;
1512 ink->points = (XPoint *)realloc((void *)ink->points,
1513 ink->maxlength * sizeof(XPoint));
1514 }
1515 ink->points[ink->length].x = dx;
1516 ink->points[ink->length].y = dy;
1517 ink->length++;
1518
1519 ADJUST:
1520 if (x < ink->left)
1521 ink->left = x;
1522 if (x > ink->right)
1523 ink->right = x;
1524 if (y < ink->top)
1525 ink->top = y;
1526 if (y > ink->bottom)
1527 ink->bottom = y;
1528
1529 { int left, right, top, bottom;
1530 SimView *view;
1531
1532 if (ink->last_x < x) { left = ink->last_x; right = x; }
1533 else { left = x; right = ink->last_x; }
1534 if (ink->last_y < y) { top = ink->last_y; bottom = y; }
1535 else { top = y; bottom = ink->last_y; }
1536
1537 left -= 5; right += 5; top -= 5; bottom += 5;
1538
1539 for (view = sim->editor; view != NULL; view = view->next) {
1540 int vleft, vtop;
1541
1542 if ((right >= (vleft = view->pan_x - (view->w_width / 2))) &&
1543 (left <= vleft + view->w_width) &&
1544 (bottom >= (vtop = view->pan_y - (view->w_height / 2))) &&
1545 (top <= vtop + view->w_height)) {
1546 /* XXX: do studly incremental update instead */
1547 view->overlay_mode = 0;
1548 EventuallyRedrawView(view);
1549 }
1550 }
1551 }
1552 ink->last_x = x; ink->last_y = y;
1553 }
1554}
1555
1556
1557EraseOverlay()
1558{
1559 Ink *ink;
1560
1561 while (sim->overlay) {
1562 ink = sim->overlay;
1563 sim->overlay = ink->next;
1564 FreeInk(ink);
1565 }
1566}
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