6 #include <X11/extensions/Xcomposite.h>
7 #include <X11/extensions/Xdamage.h>
8 #include <X11/extensions/Xrender.h>
18 XserverRegion borderSize;
19 XserverRegion extents;
26 /* for drawing translucent windows */
27 XserverRegion borderClip;
28 struct _win *prev_trans;
39 XserverRegion allDamage;
41 #define WINDOW_PLAIN 0
43 #define WINDOW_TRANS 2
44 #define TRANS_OPACITY 0.75
45 #define SHADOW_RADIUS 15
46 #define SHADOW_OPACITY 0.75
47 #define SHADOW_OFFSET_X (-SHADOW_RADIUS)
48 #define SHADOW_OFFSET_Y (-SHADOW_RADIUS)
52 gaussian (double r, double x, double y)
54 return ((1 / (sqrt (2 * M_PI * r))) *
55 exp ((- (x * x + y * y)) / (2 * r * r)));
58 typedef struct _conv {
64 make_gaussian_map (Display *dpy, double r)
67 int size = ((int) ceil ((r * 3)) + 1) & ~1;
68 int center = size / 2;
73 c = malloc (sizeof (conv) + size * size * sizeof (double));
75 c->data = (double *) (c + 1);
76 for (y = 0; y < size; y++)
77 for (x = 0; x < size; x++)
79 g = gaussian (r, (double) (x - center), (double) (y - center));
81 c->data[y * size + x] = g;
83 printf ("gaussian total %f\n", t);
84 for (y = 0; y < size; y++)
85 for (x = 0; x < size; x++)
87 c->data[y*size + x] /= t;
95 * -center 0 width width+center
96 * -center +-----+-------------------+-----+
99 * 0 +-----+-------------------+-----+
103 * height +-----+-------------------+-----+
106 * center +-----+-------------------+-----+
110 sum_gaussian (conv *map, double opacity, int x, int y, int width, int height)
115 double *g_line = map->data;
116 int g_size = map->size;
117 int center = g_size / 2;
118 int fx_start, fx_end;
119 int fy_start, fy_end;
123 * Compute set of filter values which are "in range",
124 * that's the set with:
125 * 0 <= x + (fx-center) && x + (fx-center) < width &&
126 * 0 <= y + (fy-center) && y + (fy-center) < height
128 * 0 <= x + (fx - center) x + fx - center < width
129 * center - x <= fx fx < width + center - x
132 fx_start = center - x;
135 fx_end = width + center - x;
139 fy_start = center - y;
142 fy_end = height + center - y;
146 g_line = g_line + fy_start * g_size + fx_start;
149 for (fy = fy_start; fy < fy_end; fy++)
154 for (fx = fx_start; fx < fx_end; fx++)
160 return ((unsigned int) (v * opacity * 255.0)) << 24;
164 make_shadow (Display *dpy, double opacity, double r, int width, int height)
166 conv *map = make_gaussian_map (dpy, r);
168 double *gdata = map->data;
170 int gsize = map->size;
172 int swidth = width + gsize;
173 int sheight = height + gsize;
174 int center = gsize / 2;
182 data = malloc (swidth * sheight * sizeof (int));
183 ximage = XCreateImage (dpy,
184 DefaultVisual(dpy, DefaultScreen(dpy)),
189 swidth, sheight, 32, swidth * sizeof (int));
191 * Build the gaussian in sections
198 if (ylimit > sheight / 2)
199 ylimit = (sheight + 1) / 2;
201 if (xlimit > swidth / 2)
202 xlimit = (swidth + 1) / 2;
204 for (y = 0; y < ylimit; y++)
205 for (x = 0; x < xlimit; x++)
207 d = sum_gaussian (map, opacity, x - center, y - center, width, height);
208 data[y * swidth + x] = d;
209 data[(sheight - y - 1) * swidth + x] = d;
210 data[(sheight - y - 1) * swidth + (swidth - x - 1)] = d;
211 data[y * swidth + (swidth - x - 1)] = d;
217 for (y = 0; y < ylimit; y++)
219 d = sum_gaussian (map, opacity, center, y - center, width, height);
220 for (x = gsize; x < swidth - gsize; x++)
222 data[y * swidth + x] = d;
223 data[(sheight - y - 1) * swidth + x] = d;
231 for (x = 0; x < xlimit; x++)
233 d = sum_gaussian (map, opacity, x - center, center, width, height);
234 for (y = gsize; y < sheight - gsize; y++)
236 data[y * swidth + x] = d;
237 data[y * swidth + (swidth - x - 1)] = d;
245 d = sum_gaussian (map, opacity, center, center, width, height);
246 for (y = ylimit; y < sheight - ylimit; y++)
247 for (x = xlimit; x < swidth - xlimit; x++)
248 data[y * swidth + x] = d;
255 shadow_picture (Display *dpy, double opacity, double r, int width, int height, int *wp, int *hp)
257 XImage *shadowImage = make_shadow (dpy, opacity, r, width, height);
258 Pixmap shadowPixmap = XCreatePixmap (dpy, root,
262 Picture shadowPicture = XRenderCreatePicture (dpy, shadowPixmap,
263 XRenderFindStandardFormat (dpy, PictStandardARGB32),
265 GC gc = XCreateGC (dpy, shadowPixmap, 0, 0);
267 XPutImage (dpy, shadowPixmap, gc, shadowImage, 0, 0, 0, 0,
269 shadowImage->height);
270 *wp = shadowImage->width;
271 *hp = shadowImage->height;
273 XDestroyImage (shadowImage);
274 XFreePixmap (dpy, shadowPixmap);
275 return shadowPicture;
279 find_win (Display *dpy, Window id)
283 for (w = list; w; w = w->next)
290 root_tile (Display *dpy)
296 unsigned long nitems;
297 unsigned long bytes_after;
300 XRenderPictureAttributes pa;
302 if (XGetWindowProperty (dpy, root, XInternAtom (dpy, "_XROOTPMAP_ID", False),
303 0, 4, False, AnyPropertyType,
304 &actual_type, &actual_format, &nitems, &bytes_after, &prop) == Success)
306 memcpy (&pixmap, prop, 4);
312 pixmap = XCreatePixmap (dpy, root, 1, 1, DefaultDepth (dpy, scr));
316 picture = XRenderCreatePicture (dpy, pixmap,
317 XRenderFindVisualFormat (dpy,
318 DefaultVisual (dpy, scr)),
324 c.red = c.green = c.blue = 0x8080;
326 XRenderFillRectangle (dpy, PictOpSrc, picture, &c,
333 paint_root (Display *dpy)
336 rootTile = root_tile (dpy);
338 XRenderComposite (dpy, PictOpSrc,
339 rootTile, None, rootPicture,
340 0, 0, 0, 0, 0, 0, 32767, 32767);
344 win_extents (Display *dpy, win *w)
350 double opacity = SHADOW_OPACITY;
351 if (w->mode == WINDOW_TRANS)
352 opacity = opacity * TRANS_OPACITY;
353 w->shadow = shadow_picture (dpy, opacity, SHADOW_RADIUS,
354 w->a.width, w->a.height,
355 &w->shadow_width, &w->shadow_height);
356 w->shadow_dx = SHADOW_OFFSET_X;
357 w->shadow_dy = SHADOW_OFFSET_Y;
359 r.x = w->a.x + w->a.border_width + w->shadow_dx;
360 r.y = w->a.y + w->a.border_width + w->shadow_dy;
361 r.width = w->shadow_width;
362 r.height = w->shadow_height;
363 return XFixesCreateRegion (dpy, &r, 1);
367 border_size (Display *dpy, win *w)
369 XserverRegion border;
370 border = XFixesCreateRegionFromWindow (dpy, w->id, WindowRegionBounding);
372 XFixesUnionRegion (dpy, border, border, w->a.x, w->a.y, None, 0, 0);
377 paint_all (Display *dpy, XserverRegion region)
382 for (w = list; w; w = w->next)
386 if (w->a.map_state != IsViewable)
389 XFixesDestroyRegion (dpy, w->borderSize);
390 w->borderSize = border_size (dpy, w);
392 XFixesDestroyRegion (dpy, w->extents);
393 w->extents = win_extents (dpy, w);
394 if (w->mode != WINDOW_TRANS)
396 XFixesSetPictureClipRegion (dpy, rootPicture, 0, 0, region);
397 XFixesSubtractRegion (dpy, region, region, 0, 0, w->borderSize, 0, 0);
398 XRenderComposite (dpy, PictOpSrc, w->picture, None, rootPicture,
400 w->a.x + w->a.border_width,
401 w->a.y + w->a.border_width,
405 w->borderClip = XFixesCreateRegion (dpy, 0, 0);
406 XFixesUnionRegion (dpy, w->borderClip, region, 0, 0, None, 0, 0);
410 XFixesSetPictureClipRegion (dpy, rootPicture, 0, 0, region);
412 for (w = t; w; w = w->prev_trans)
414 XFixesSetPictureClipRegion (dpy, rootPicture, 0, 0, w->borderClip);
417 XRenderComposite (dpy, PictOpOver, w->shadow, None, rootPicture,
419 w->a.x + w->a.border_width + w->shadow_dx,
420 w->a.y + w->a.border_width + w->shadow_dy,
421 w->shadow_width, w->shadow_height);
423 if (w->mode == WINDOW_TRANS)
424 XRenderComposite (dpy, PictOpOver, w->picture, transPicture, rootPicture,
426 w->a.x + w->a.border_width,
427 w->a.y + w->a.border_width,
430 XFixesDestroyRegion (dpy, w->borderClip);
431 w->borderClip = None;
433 XFixesDestroyRegion (dpy, region);
437 add_damage (Display *dpy, XserverRegion damage)
441 XFixesUnionRegion (dpy, allDamage, allDamage, 0, 0, damage, 0, 0);
442 XFixesDestroyRegion (dpy, damage);
449 repair_win (Display *dpy, Window id)
451 win *w = find_win (dpy, id);
456 /* printf ("repair 0x%x\n", w->id); */
457 parts = XFixesCreateRegion (dpy, 0, 0);
458 /* translate region */
459 XDamageSubtract (dpy, w->damage, None, parts);
460 XFixesUnionRegion (dpy, parts, parts, w->a.x, w->a.y, None, 0, 0);
461 add_damage (dpy, parts);
465 map_win (Display *dpy, Window id)
467 win *w = find_win (dpy, id);
468 XserverRegion region;
472 w->a.map_state = IsViewable;
473 w->damage = XDamageCreate (dpy, id, XDamageReportNonEmpty);
474 region = win_extents (dpy, w);
475 add_damage (dpy, region);
479 unmap_win (Display *dpy, Window id)
481 win *w = find_win (dpy, id);
485 w->a.map_state = IsUnmapped;
486 if (w->damage != None)
488 XDamageDestroy (dpy, w->damage);
491 if (w->extents != None)
493 add_damage (dpy, w->extents); /* destroys region */
499 add_win (Display *dpy, Window id, Window prev)
501 win *new = malloc (sizeof (win));
504 XRenderPictureAttributes pa;
510 for (p = &list; *p; p = &(*p)->next)
511 if ((*p)->id == prev)
517 if (!XGetWindowAttributes (dpy, id, &new->a))
524 pa.subwindow_mode = IncludeInferiors;
525 new->picture = XRenderCreatePicture (dpy, id,
526 XRenderFindVisualFormat (dpy,
532 new->borderSize = None;
534 if (new->a.override_redirect)
535 new->mode = WINDOW_TRANS;
537 new->mode = WINDOW_DROP;
540 if (new->a.map_state == IsViewable)
545 configure_win (Display *dpy, XConfigureEvent *ce)
547 win *w = find_win (dpy, ce->window);
549 XserverRegion damage = None;
553 if (w->a.map_state == IsViewable)
555 damage = XFixesCreateRegion (dpy, 0, 0);
556 if (w->extents != None)
557 XFixesUnionRegion (dpy, damage, w->extents, 0, 0, None, 0, 0);
561 if (w->a.width != ce->width || w->a.height != ce->height)
564 XRenderFreePicture (dpy, w->shadow);
567 w->a.width = ce->width;
568 w->a.height = ce->height;
569 w->a.border_width = ce->border_width;
570 w->a.override_redirect = ce->override_redirect;
575 if (above != ce->above)
580 for (prev = &list; *prev; prev = &(*prev)->next)
586 for (prev = &list; *prev; prev = &(*prev)->next)
588 if ((*prev)->id == ce->above)
596 XserverRegion border = border_size (dpy, w);
597 XFixesUnionRegion (dpy, damage, damage, 0, 0, border, 0, 0);
598 add_damage (dpy, damage);
603 destroy_win (Display *dpy, Window id, Bool gone)
607 for (prev = &list; w = *prev; prev = &w->next)
613 XRenderFreePicture (dpy, w->picture);
624 printf ("\t%08x: %d x %d + %d + %d (%d)\n", w->id,
625 w->a.width, w->a.height, w->a.x, w->a.y, w->a.border_width);
633 printf ("windows:\n");
634 for (w = list; w; w = w->next)
639 damage_win (Display *dpy, XDamageNotifyEvent *de)
641 repair_win (dpy, de->drawable);
645 error (Display *dpy, XErrorEvent *ev)
647 printf ("error %d request %d minor %d\n",
648 ev->error_code, ev->request_code, ev->minor_code);
652 expose_root (Display *dpy, Window root, XRectangle *rects, int nrects)
654 XserverRegion region = XFixesCreateRegion (dpy, rects, nrects);
656 add_damage (dpy, region);
662 int event_base, error_base;
663 Window root_return, parent_return;
666 unsigned int nchildren;
668 int damage_event, damage_error;
669 int xfixes_event, xfixes_error;
670 XRenderPictureAttributes pa;
672 XRectangle *expose_rects = 0;
677 dpy = XOpenDisplay (0);
680 fprintf (stderr, "Can't open display\n");
683 XSetErrorHandler (error);
684 scr = DefaultScreen (dpy);
685 root = RootWindow (dpy, scr);
686 pa.subwindow_mode = IncludeInferiors;
687 transPixmap = XCreatePixmap (dpy, root, 1, 1, 8);
689 transPicture = XRenderCreatePicture (dpy, transPixmap,
690 XRenderFindStandardFormat (dpy, PictStandardA8),
693 c.red = c.green = c.blue = 0;
695 XRenderFillRectangle (dpy, PictOpSrc, transPicture, &c, 0, 0, 1, 1);
697 rootPicture = XRenderCreatePicture (dpy, root,
698 XRenderFindVisualFormat (dpy,
699 DefaultVisual (dpy, scr)),
702 if (!XCompositeQueryExtension (dpy, &event_base, &error_base))
704 fprintf (stderr, "No composite extension\n");
707 if (!XDamageQueryExtension (dpy, &damage_event, &damage_error))
709 fprintf (stderr, "No damage extension\n");
712 if (!XFixesQueryExtension (dpy, &xfixes_event, &xfixes_error))
714 fprintf (stderr, "No XFixes extension\n");
719 XCompositeRedirectSubwindows (dpy, root, CompositeRedirectManual);
721 XSelectInput (dpy, root, SubstructureNotifyMask|ExposureMask);
722 XQueryTree (dpy, root, &root_return, &parent_return, &children, &nchildren);
723 for (i = 0; i < nchildren; i++)
724 add_win (dpy, children[i], i ? children[i-1] : None);
731 XNextEvent (dpy, &ev);
732 /* printf ("event %d\n", ev.type); */
735 add_win (dpy, ev.xcreatewindow.window, 0);
737 case ConfigureNotify:
738 configure_win (dpy, &ev.xconfigure);
741 destroy_win (dpy, ev.xdestroywindow.window, True);
744 map_win (dpy, ev.xmap.window);
747 unmap_win (dpy, ev.xunmap.window);
750 if (ev.xreparent.parent == root)
751 add_win (dpy, ev.xreparent.window, 0);
753 destroy_win (dpy, ev.xreparent.window, False);
756 if (ev.xexpose.window == root)
758 int more = ev.xexpose.count + 1;
759 if (n_expose == size_expose)
763 expose_rects = realloc (expose_rects,
764 (size_expose + more) *
765 sizeof (XRectangle));
770 expose_rects = malloc (more * sizeof (XRectangle));
774 expose_rects[n_expose].x = ev.xexpose.x;
775 expose_rects[n_expose].y = ev.xexpose.y;
776 expose_rects[n_expose].width = ev.xexpose.width;
777 expose_rects[n_expose].height = ev.xexpose.height;
779 if (ev.xexpose.count == 0)
781 expose_root (dpy, root, expose_rects, n_expose);
787 if (ev.type == damage_event + XDamageNotify)
788 damage_win (dpy, (XDamageNotifyEvent *) &ev);
791 } while (XEventsQueued (dpy, QueuedAfterReading));
794 paint_all (dpy, allDamage);