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backend/x11: clamp hotspot to texture bounds

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When a new texture is set, the hotspot may actually belong to the
previous texture and be out of bounds. Rather than incur X errors for
these, clamp the hotspot to be inside of the texture.

This fixes weston examples updating their cursors (e.g.
weston-eventdemo).
This commit is contained in:
Ilia Mirkin 2021-02-06 16:15:46 -05:00 committed by Simon Ser
parent 7dffe9339b
commit 10dbb00f5f
1 changed files with 13 additions and 0 deletions
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13
backend/x11/output.c
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@ -477,6 +477,19 @@ static bool output_set_cursor(struct wlr_output *wlr_output,
if (texture != NULL) {
width = texture->width * wlr_output->scale / scale;
height = texture->height * wlr_output->scale / scale;
if (hotspot_x < 0) {
hotspot_x = 0;
}
if ((uint32_t)hotspot_x > texture->width) {
hotspot_x = texture->width;
}
if (hotspot_y < 0) {
hotspot_y = 0;
}
if ((uint32_t)hotspot_y > texture->height) {
hotspot_y = texture->height;
}
}
struct wlr_box hotspot = { .x = hotspot_x, .y = hotspot_y };