xorg-x11-server/confine_to_shape.diff

107 lines
2.7 KiB
Diff

--- dix/events.c.orig 2009-02-25 20:12:10.000000000 +0100
+++ dix/events.c 2009-02-27 16:53:47.000000000 +0100
@@ -786,37 +786,80 @@ ConfineToShape(DeviceIntPtr pDev, Region
{
BoxRec box;
int x = *px, y = *py;
- int incx = 1, incy = 1;
SpritePtr pSprite;
+ int nbox;
+ BoxPtr pbox;
+ int d, min = (~0U >> 1), dx2, dy2, x_r, y_r;
pSprite = pDev->spriteInfo->sprite;
if (POINT_IN_REGION(pSprite->hot.pScreen, shape, x, y, &box))
return;
- box = *REGION_EXTENTS(pSprite->hot.pScreen, shape);
- /* this is rather crude */
- do {
- x += incx;
- if (x >= box.x2)
- {
- incx = -1;
- x = *px - 1;
+
+ for (nbox = REGION_NUM_RECTS (shape),
+ pbox = REGION_RECTS(shape);
+ nbox--;
+ pbox++)
+ {
+ if (pbox->x1 < x && pbox->x2 > x) {
+ d = pbox->y1 - y;
+ if (d >= 0) {
+ d *= d;
+ if (d < min) {
+ *px = x;
+ *py = pbox->y1 + 1;
+ min = d;
+ }
+ } else {
+ d = pbox->y2 - y; d *= d;
+ if (d < min) {
+ *px = x;
+ *py = pbox->y2 - 1;
+ min = d;
+ }
+ }
}
- else if (x < box.x1)
- {
- incx = 1;
- x = *px;
- y += incy;
- if (y >= box.y2)
- {
- incy = -1;
- y = *py - 1;
+ else if (pbox->y1 < y && pbox->y2 > y) {
+ d = pbox->x1 - x;
+ if (d >= 0) {
+ d *= d;
+ if (d < min) {
+ *px = pbox->x1 + 1;
+ *py = y;
+ min = d;
+ }
+ } else {
+ d = pbox->x2 - x; d *= d;
+ if (d < min) {
+ *px = pbox->x2 - 1;
+ *py = y;
+ min = d;
+ }
+ }
+
+ } else {
+ dx2 = pbox->x1 - x;
+ if (dx2 >= 0) {
+ dx2 *= dx2;
+ x_r = pbox->x1 + 1;
+ } else {
+ dx2 = pbox->x2 - x; dx2 *= dx2;
+ x_r = pbox->x2 - 1;
+ }
+ dy2 = pbox->y1 - y;
+ if (dy2 >= 0) {
+ dy2 *= dy2;
+ y_r = pbox->y1 + 1;
+ } else {
+ dy2 = pbox->y2 - y; dy2 *= dy2;
+ y_r = pbox->y2 - 1;
+ }
+ if ((d = dx2 + dy2) < min) {
+ *px = x_r;
+ *py = y_r;
+ min = d;
}
- else if (y < box.y1)
- return; /* should never get here! */
}
- } while (!POINT_IN_REGION(pSprite->hot.pScreen, shape, x, y, &box));
- *px = x;
- *py = y;
+ }
}
static void