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