2 * Copyright (c) 1994-2003 by The XFree86 Project, Inc.
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
20 * OTHER DEALINGS IN THE SOFTWARE.
22 * Except as contained in this notice, the name of the copyright holder(s)
23 * and author(s) shall not be used in advertising or otherwise to promote
24 * the sale, use or other dealings in this Software without prior written
25 * authorization from the copyright holder(s) and author(s).
28 #ifdef HAVE_XORG_CONFIG_H
29 #include <xorg-config.h>
36 #include "mipointer.h"
37 #include "scrnintstr.h"
44 #include "xf86_OSproc.h"
46 #include <X11/extensions/XIproto.h>
47 #include "xf86Xinput.h"
53 typedef struct _xf86EdgeRec {
58 struct _xf86EdgeRec *next;
59 } xf86EdgeRec, *xf86EdgePtr;
62 xf86EdgePtr left, right, up, down;
63 } xf86ScreenLayoutRec, *xf86ScreenLayoutPtr;
65 static Bool xf86CursorOffScreen(ScreenPtr *pScreen, int *x, int *y);
66 static void xf86CrossScreen(ScreenPtr pScreen, Bool entering);
67 static void xf86WarpCursor(DeviceIntPtr pDev, ScreenPtr pScreen, int x, int y);
69 static void xf86PointerMoved(ScrnInfoPtr pScrn, int x, int y);
71 static miPointerScreenFuncRec xf86PointerScreenFuncs = {
77 static xf86ScreenLayoutRec xf86ScreenLayout[MAXSCREENS];
79 static Bool HardEdges;
83 * Initialize paning & zooming parameters, so that a driver must only
84 * check what resolutions are possible and whether the virtual area
85 * is valid if specified.
89 xf86InitViewport(ScrnInfoPtr pScr)
92 pScr->PointerMoved = xf86PointerMoved;
95 * Compute the initial Viewport if necessary
98 if (pScr->display->frameX0 < 0) {
99 pScr->frameX0 = (pScr->virtualX - pScr->modes->HDisplay) / 2;
100 pScr->frameY0 = (pScr->virtualY - pScr->modes->VDisplay) / 2;
103 pScr->frameX0 = pScr->display->frameX0;
104 pScr->frameY0 = pScr->display->frameY0;
108 pScr->frameX1 = pScr->frameX0 + pScr->modes->HDisplay - 1;
109 pScr->frameY1 = pScr->frameY0 + pScr->modes->VDisplay - 1;
112 * Now adjust the initial Viewport, so it lies within the virtual area
114 if (pScr->frameX1 >= pScr->virtualX) {
115 pScr->frameX0 = pScr->virtualX - pScr->modes->HDisplay;
116 pScr->frameX1 = pScr->frameX0 + pScr->modes->HDisplay - 1;
119 if (pScr->frameY1 >= pScr->virtualY) {
120 pScr->frameY0 = pScr->virtualY - pScr->modes->VDisplay;
121 pScr->frameY1 = pScr->frameY0 + pScr->modes->VDisplay - 1;
127 * Scroll the visual part of the screen so the pointer is visible.
131 xf86SetViewport(ScreenPtr pScreen, int x, int y)
133 ScrnInfoPtr pScr = xf86ScreenToScrn(pScreen);
135 (*pScr->PointerMoved) (pScr, x, y);
139 xf86PointerMoved(ScrnInfoPtr pScr, int x, int y)
141 Bool frameChanged = FALSE;
144 * check wether (x,y) belongs to the visual part of the screen
145 * if not, change the base of the displayed frame accoring
147 if (pScr->frameX0 > x) {
149 pScr->frameX1 = x + pScr->currentMode->HDisplay - 1;
153 if (pScr->frameX1 < x) {
154 pScr->frameX1 = x + 1;
155 pScr->frameX0 = x - pScr->currentMode->HDisplay + 1;
159 if (pScr->frameY0 > y) {
161 pScr->frameY1 = y + pScr->currentMode->VDisplay - 1;
165 if (pScr->frameY1 < y) {
167 pScr->frameY0 = y - pScr->currentMode->VDisplay + 1;
171 if (frameChanged && pScr->AdjustFrame != NULL)
172 pScr->AdjustFrame(pScr, pScr->frameX0, pScr->frameY0);
177 * Enable/disable ZoomViewport
181 xf86LockZoom(ScreenPtr pScreen, Bool lock)
183 ScrnInfoPtr pScr = xf86ScreenToScrn(pScreen);
184 pScr->zoomLocked = lock;
189 * This is called by both keyboard processing and the VidMode extension to
194 xf86SwitchMode(ScreenPtr pScreen, DisplayModePtr mode)
196 ScrnInfoPtr pScr = xf86ScreenToScrn(pScreen);
197 ScreenPtr pCursorScreen;
200 DeviceIntPtr dev, it;
202 if (!pScr->vtSema || !mode || !pScr->SwitchMode)
206 if (DGAActive(pScr->scrnIndex))
210 if (mode == pScr->currentMode)
213 if (mode->HDisplay > pScr->virtualX || mode->VDisplay > pScr->virtualY)
216 /* Let's take an educated guess for which pointer to take here. And about as
217 educated as it gets is to take the first pointer we find.
219 for (dev = inputInfo.devices; dev; dev = dev->next) {
220 if (IsPointerDevice(dev) && dev->spriteInfo->spriteOwner)
224 pCursorScreen = miPointerGetScreen(dev);
225 if (pScreen == pCursorScreen)
226 miPointerGetPosition(dev, &px, &py);
229 Switched = (*pScr->SwitchMode) (pScr, mode);
231 pScr->currentMode = mode;
234 * Adjust frame for new display size.
235 * Frame is centered around cursor position if cursor is on same screen.
237 if (pScreen == pCursorScreen)
238 pScr->frameX0 = px - (mode->HDisplay / 2) + 1;
241 (pScr->frameX0 + pScr->frameX1 + 1 - mode->HDisplay) / 2;
243 if (pScr->frameX0 < 0)
246 pScr->frameX1 = pScr->frameX0 + mode->HDisplay - 1;
247 if (pScr->frameX1 >= pScr->virtualX) {
248 pScr->frameX0 = pScr->virtualX - mode->HDisplay;
249 pScr->frameX1 = pScr->virtualX - 1;
252 if (pScreen == pCursorScreen)
253 pScr->frameY0 = py - (mode->VDisplay / 2) + 1;
256 (pScr->frameY0 + pScr->frameY1 + 1 - mode->VDisplay) / 2;
258 if (pScr->frameY0 < 0)
261 pScr->frameY1 = pScr->frameY0 + mode->VDisplay - 1;
262 if (pScr->frameY1 >= pScr->virtualY) {
263 pScr->frameY0 = pScr->virtualY - mode->VDisplay;
264 pScr->frameY1 = pScr->virtualY - 1;
269 if (pScr->AdjustFrame)
270 (*pScr->AdjustFrame) (pScr, pScr->frameX0, pScr->frameY0);
272 /* The original code centered the frame around the cursor if possible.
273 * Since this is hard to achieve with multiple cursors, we do the following:
274 * - center around the first pointer
275 * - move all other pointers to the nearest edge on the screen (or leave
276 * them unmodified if they are within the boundaries).
278 if (pScreen == pCursorScreen) {
279 xf86WarpCursor(dev, pScreen, px, py);
282 for (it = inputInfo.devices; it; it = it->next) {
286 if (IsPointerDevice(it) && it->spriteInfo->spriteOwner) {
287 pCursorScreen = miPointerGetScreen(it);
288 if (pScreen == pCursorScreen) {
289 miPointerGetPosition(it, &px, &py);
290 if (px < pScr->frameX0)
292 else if (px > pScr->frameX1)
295 if (py < pScr->frameY0)
297 else if (py > pScr->frameY1)
300 xf86WarpCursor(it, pScreen, px, py);
309 * xf86ZoomViewport --
310 * Reinitialize the visual part of the screen for another mode.
314 xf86ZoomViewport(ScreenPtr pScreen, int zoom)
316 ScrnInfoPtr pScr = xf86ScreenToScrn(pScreen);
319 if (pScr->zoomLocked || !(mode = pScr->currentMode))
327 } while (mode != pScr->currentMode && !(mode->type & M_T_USERDEF));
329 (void) xf86SwitchMode(pScreen, mode);
333 FindEdge(xf86EdgePtr edge, int val)
335 while (edge && (edge->end <= val))
338 if (edge && (edge->start <= val))
345 * xf86CursorOffScreen --
346 * Check whether it is necessary to switch to another screen
350 xf86CursorOffScreen(ScreenPtr *pScreen, int *x, int *y)
355 if (screenInfo.numScreens == 1)
362 if (tmp >= (*pScreen)->height)
363 tmp = (*pScreen)->height - 1;
365 if ((edge = xf86ScreenLayout[(*pScreen)->myNum].left))
366 edge = FindEdge(edge, tmp);
371 *x += edge->offset.x;
372 *y += edge->offset.y;
373 *pScreen = xf86Screens[edge->screen]->pScreen;
377 if (*x >= (*pScreen)->width) {
381 if (tmp >= (*pScreen)->height)
382 tmp = (*pScreen)->height - 1;
384 if ((edge = xf86ScreenLayout[(*pScreen)->myNum].right))
385 edge = FindEdge(edge, tmp);
388 *x = (*pScreen)->width - 1;
390 *x += edge->offset.x;
391 *y += edge->offset.y;
392 *pScreen = xf86Screens[edge->screen]->pScreen;
400 if (tmp >= (*pScreen)->width)
401 tmp = (*pScreen)->width - 1;
403 if ((edge = xf86ScreenLayout[(*pScreen)->myNum].up))
404 edge = FindEdge(edge, tmp);
409 *x += edge->offset.x;
410 *y += edge->offset.y;
411 *pScreen = xf86Screens[edge->screen]->pScreen;
415 if (*y >= (*pScreen)->height) {
419 if (tmp >= (*pScreen)->width)
420 tmp = (*pScreen)->width - 1;
422 if ((edge = xf86ScreenLayout[(*pScreen)->myNum].down))
423 edge = FindEdge(edge, tmp);
426 *y = (*pScreen)->height - 1;
428 *x += edge->offset.x;
429 *y += edge->offset.y;
430 (*pScreen) = xf86Screens[edge->screen]->pScreen;
435 /* This presents problems for overlapping screens when
436 HardEdges is used. Have to think about the logic more */
437 if ((*x < 0) || (*x >= (*pScreen)->width) ||
438 (*y < 0) || (*y >= (*pScreen)->height)) {
439 /* We may have crossed more than one screen */
440 xf86CursorOffScreen(pScreen, x, y);
449 * Switch to another screen
451 * Currently nothing special happens, but mi assumes the CrossScreen
456 xf86CrossScreen(ScreenPtr pScreen, Bool entering)
462 * Warp possible to another screen
467 xf86WarpCursor(DeviceIntPtr pDev, ScreenPtr pScreen, int x, int y)
470 miPointerWarpCursor(pDev, pScreen, x, y);
472 xf86Info.currentScreen = pScreen;
477 xf86GetPointerScreenFuncs(void)
479 return (void *) &xf86PointerScreenFuncs;
483 AddEdge(xf86EdgePtr edge,
484 short min, short max, short dx, short dy, short screen)
486 xf86EdgePtr pEdge = edge, pPrev = NULL, pNew;
489 while (pEdge && (min >= pEdge->end)) {
495 if (!(pNew = malloc(sizeof(xf86EdgeRec))))
498 pNew->screen = screen;
512 else if (min < pEdge->start) {
513 if (!(pNew = malloc(sizeof(xf86EdgeRec))))
516 pNew->screen = screen;
527 if (max <= pEdge->start) {
532 pNew->end = pEdge->start;
550 FillOutEdge(xf86EdgePtr pEdge, int limit)
555 if (pEdge->start > 0)
558 while ((pNext = pEdge->next)) {
559 diff = pNext->start - pEdge->end;
561 pEdge->end += diff >> 1;
562 pNext->start -= diff - (diff >> 1);
567 if (pEdge->end < limit)
572 * xf86InitOrigins() can deal with a maximum of 32 screens
573 * on 32 bit architectures, 64 on 64 bit architectures.
577 xf86InitOrigins(void)
579 unsigned long screensLeft, prevScreensLeft, mask;
580 screenLayoutPtr screen;
581 ScreenPtr pScreen, refScreen;
582 int x1, x2, y1, y2, left, right, top, bottom;
583 int i, j, ref, minX, minY, min, max;
584 xf86ScreenLayoutPtr pLayout;
585 Bool OldStyleConfig = FALSE;
587 /* need to have this set up with a config file option */
590 memset(xf86ScreenLayout, 0, MAXSCREENS * sizeof(xf86ScreenLayoutRec));
592 screensLeft = prevScreensLeft = (1 << xf86NumScreens) - 1;
595 for (mask = screensLeft, i = 0; mask; mask >>= 1, i++) {
599 screen = &xf86ConfigLayout.screens[i];
601 if (screen->refscreen != NULL &&
602 screen->refscreen->screennum >= xf86NumScreens) {
603 screensLeft &= ~(1 << i);
605 "Not including screen \"%s\" in origins calculation.\n",
610 pScreen = xf86Screens[i]->pScreen;
611 switch (screen->where) {
613 OldStyleConfig = TRUE;
614 pLayout = &xf86ScreenLayout[i];
615 /* force edge lists */
617 ref = screen->left->screennum;
618 if (!xf86Screens[ref] || !xf86Screens[ref]->pScreen) {
619 ErrorF("Referenced uninitialized screen in Layout!\n");
622 pLayout->left = AddEdge(pLayout->left,
624 xf86Screens[ref]->pScreen->width, 0,
628 ref = screen->right->screennum;
629 if (!xf86Screens[ref] || !xf86Screens[ref]->pScreen) {
630 ErrorF("Referenced uninitialized screen in Layout!\n");
633 pLayout->right = AddEdge(pLayout->right,
635 -pScreen->width, 0, ref);
638 ref = screen->top->screennum;
639 if (!xf86Screens[ref] || !xf86Screens[ref]->pScreen) {
640 ErrorF("Referenced uninitialized screen in Layout!\n");
643 pLayout->up = AddEdge(pLayout->up,
645 0, xf86Screens[ref]->pScreen->height,
648 if (screen->bottom) {
649 ref = screen->bottom->screennum;
650 if (!xf86Screens[ref] || !xf86Screens[ref]->pScreen) {
651 ErrorF("Referenced uninitialized screen in Layout!\n");
654 pLayout->down = AddEdge(pLayout->down,
655 0, pScreen->width, 0,
656 -pScreen->height, ref);
658 /* we could also try to place it based on those
659 relative locations if we wanted to */
660 screen->x = screen->y = 0;
663 pScreen->x = screen->x;
664 pScreen->y = screen->y;
665 screensLeft &= ~(1 << i);
668 ref = screen->refscreen->screennum;
669 if (!xf86Screens[ref] || !xf86Screens[ref]->pScreen) {
670 ErrorF("Referenced uninitialized screen in Layout!\n");
673 if (screensLeft & (1 << ref))
675 refScreen = xf86Screens[ref]->pScreen;
676 pScreen->x = refScreen->x + screen->x;
677 pScreen->y = refScreen->y + screen->y;
678 screensLeft &= ~(1 << i);
681 ref = screen->refscreen->screennum;
682 if (!xf86Screens[ref] || !xf86Screens[ref]->pScreen) {
683 ErrorF("Referenced uninitialized screen in Layout!\n");
686 if (screensLeft & (1 << ref))
688 refScreen = xf86Screens[ref]->pScreen;
689 pScreen->x = refScreen->x + refScreen->width;
690 pScreen->y = refScreen->y;
691 screensLeft &= ~(1 << i);
694 ref = screen->refscreen->screennum;
695 if (!xf86Screens[ref] || !xf86Screens[ref]->pScreen) {
696 ErrorF("Referenced uninitialized screen in Layout!\n");
699 if (screensLeft & (1 << ref))
701 refScreen = xf86Screens[ref]->pScreen;
702 pScreen->x = refScreen->x - pScreen->width;
703 pScreen->y = refScreen->y;
704 screensLeft &= ~(1 << i);
707 ref = screen->refscreen->screennum;
708 if (!xf86Screens[ref] || !xf86Screens[ref]->pScreen) {
709 ErrorF("Referenced uninitialized screen in Layout!\n");
712 if (screensLeft & (1 << ref))
714 refScreen = xf86Screens[ref]->pScreen;
715 pScreen->x = refScreen->x;
716 pScreen->y = refScreen->y + refScreen->height;
717 screensLeft &= ~(1 << i);
720 ref = screen->refscreen->screennum;
721 if (!xf86Screens[ref] || !xf86Screens[ref]->pScreen) {
722 ErrorF("Referenced uninitialized screen in Layout!\n");
725 if (screensLeft & (1 << ref))
727 refScreen = xf86Screens[ref]->pScreen;
728 pScreen->x = refScreen->x;
729 pScreen->y = refScreen->y - pScreen->height;
730 screensLeft &= ~(1 << i);
733 ErrorF("Illegal placement keyword in Layout!\n");
742 if (screensLeft == prevScreensLeft) {
743 /* All the remaining screens are referencing each other.
744 Assign a value to one of them and go through again */
746 while (!((1 << i) & screensLeft)) {
750 ref = xf86ConfigLayout.screens[i].refscreen->screennum;
751 xf86Screens[ref]->pScreen->x = xf86Screens[ref]->pScreen->y = 0;
752 screensLeft &= ~(1 << ref);
755 prevScreensLeft = screensLeft;
758 /* justify the topmost and leftmost to (0,0) */
759 minX = xf86Screens[0]->pScreen->x;
760 minY = xf86Screens[0]->pScreen->y;
762 for (i = 1; i < xf86NumScreens; i++) {
763 if (xf86Screens[i]->pScreen->x < minX)
764 minX = xf86Screens[i]->pScreen->x;
765 if (xf86Screens[i]->pScreen->y < minY)
766 minY = xf86Screens[i]->pScreen->y;
770 for (i = 0; i < xf86NumScreens; i++) {
771 xf86Screens[i]->pScreen->x -= minX;
772 xf86Screens[i]->pScreen->y -= minY;
776 /* Create the edge lists */
778 if (!OldStyleConfig) {
779 for (i = 0; i < xf86NumScreens; i++) {
780 pLayout = &xf86ScreenLayout[i];
782 pScreen = xf86Screens[i]->pScreen;
785 right = left + pScreen->width;
787 bottom = top + pScreen->height;
789 for (j = 0; j < xf86NumScreens; j++) {
793 refScreen = xf86Screens[j]->pScreen;
796 x2 = x1 + refScreen->width;
798 y2 = y1 + refScreen->height;
800 if ((bottom > y1) && (top < y2)) {
804 max = pScreen->height - (bottom - y2);
805 if (max > pScreen->height)
806 max = pScreen->height;
808 if (((left - 1) >= x1) && ((left - 1) < x2))
809 pLayout->left = AddEdge(pLayout->left, min, max,
810 pScreen->x - refScreen->x,
811 pScreen->y - refScreen->y, j);
813 if ((right >= x1) && (right < x2))
814 pLayout->right = AddEdge(pLayout->right, min, max,
815 pScreen->x - refScreen->x,
816 pScreen->y - refScreen->y, j);
819 if ((left < x2) && (right > x1)) {
823 max = pScreen->width - (right - x2);
824 if (max > pScreen->width)
825 max = pScreen->width;
827 if (((top - 1) >= y1) && ((top - 1) < y2))
828 pLayout->up = AddEdge(pLayout->up, min, max,
829 pScreen->x - refScreen->x,
830 pScreen->y - refScreen->y, j);
832 if ((bottom >= y1) && (bottom < y2))
833 pLayout->down = AddEdge(pLayout->down, min, max,
834 pScreen->x - refScreen->x,
835 pScreen->y - refScreen->y, j);
841 if (!HardEdges && !OldStyleConfig) {
842 for (i = 0; i < xf86NumScreens; i++) {
843 pLayout = &xf86ScreenLayout[i];
844 pScreen = xf86Screens[i]->pScreen;
846 FillOutEdge(pLayout->left, pScreen->height);
848 FillOutEdge(pLayout->right, pScreen->height);
850 FillOutEdge(pLayout->up, pScreen->width);
852 FillOutEdge(pLayout->down, pScreen->width);
856 update_desktop_dimensions();
860 xf86ReconfigureLayout(void)
864 for (i = 0; i < MAXSCREENS; i++) {
865 xf86ScreenLayoutPtr sl = &xf86ScreenLayout[i];
867 /* we don't have to zero these, xf86InitOrigins() takes care of that */