108 lines
3.3 KiB
C
108 lines
3.3 KiB
C
/*
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* Copyright © 2006 Keith Packard
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*
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* Permission to use, copy, modify, distribute, and sell this software and its
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* documentation for any purpose is hereby granted without fee, provided that
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* the above copyright notice appear in all copies and that both that copyright
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* notice and this permission notice appear in supporting documentation, and
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* that the name of the copyright holders not be used in advertising or
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* publicity pertaining to distribution of the software without specific,
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* written prior permission. The copyright holders make no representations
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* about the suitability of this software for any purpose. It is provided "as
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* is" without express or implied warranty.
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*
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* THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
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* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
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* EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
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* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
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* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
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* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
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* OF THIS SOFTWARE.
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*/
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#include <dix-config.h>
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#include "dix/cursor_priv.h"
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#include "dix/input_priv.h"
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#include "randr/randrstr_priv.h"
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#include "randrstr.h"
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#include "inputstr.h"
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/*
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* Find the CRTC nearest the specified position, ignoring 'skip'
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*/
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static void
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RRPointerToNearestCrtc(DeviceIntPtr pDev, ScreenPtr pScreen, int x, int y,
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RRCrtcPtr skip)
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{
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rrScrPriv(pScreen);
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int c;
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RRCrtcPtr nearest = NULL;
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int best = 0;
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int best_dx = 0, best_dy = 0;
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for (c = 0; c < pScrPriv->numCrtcs; c++) {
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RRCrtcPtr crtc = pScrPriv->crtcs[c];
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RRModePtr mode = crtc->mode;
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int dx, dy;
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int dist;
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int scan_width, scan_height;
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if (!mode)
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continue;
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if (crtc == skip)
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continue;
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RRCrtcGetScanoutSize(crtc, &scan_width, &scan_height);
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if (x < crtc->x)
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dx = crtc->x - x;
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else if (x > crtc->x + scan_width - 1)
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dx = crtc->x + (scan_width - 1) - x;
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else
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dx = 0;
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if (y < crtc->y)
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dy = crtc->y - y;
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else if (y > crtc->y + scan_height - 1)
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dy = crtc->y + (scan_height - 1) - y;
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else
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dy = 0;
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dist = dx * dx + dy * dy;
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if (!nearest || dist < best) {
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nearest = crtc;
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best_dx = dx;
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best_dy = dy;
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best = dist;
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}
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}
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if (best_dx || best_dy)
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(*pScreen->SetCursorPosition) (pDev, pScreen, x + best_dx, y + best_dy,
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TRUE);
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pScrPriv->pointerCrtc = nearest;
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}
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/*
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* When the screen is reconfigured, move all pointers to the nearest
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* CRTC
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*/
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void
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RRPointerScreenConfigured(ScreenPtr pScreen)
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{
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WindowPtr pRoot;
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ScreenPtr pCurrentScreen;
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int x, y;
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DeviceIntPtr pDev;
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for (pDev = inputInfo.devices; pDev; pDev = pDev->next) {
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if (IsPointerDevice(pDev)) {
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pRoot = InputDevCurrentRootWindow(pDev);
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pCurrentScreen = pRoot ? pRoot->drawable.pScreen : NULL;
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if (pScreen == pCurrentScreen) {
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GetSpritePosition(pDev, &x, &y);
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RRPointerToNearestCrtc(pDev, pScreen, x, y, NULL);
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}
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}
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}
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}
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