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new backend: fix crash when window's shadow state change 

Create a shadow image for a mapped window when it's shadow become enabled.
For unmapped window, the shadow image is created during mapping. Also,
if the window has IMAGE_ERROR flag, it won't be render anyway. So shadow
image won't be created in that case either.

Signed-off-by: Yuxuan Shui <yshuiv7@gmail.com>
This commit is contained in:
Yuxuan Shui 2019-03-31 22:49:40 +01:00
parent eeb8712982
commit 18f6a20bf4
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GPG Key ID: 37C999F617EA1A47
1 changed files with 18 additions and 2 deletions
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18
src/win.c
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@ -528,8 +528,24 @@ void win_update_prop_shadow(session_t *ps, win *w) {
}
void win_set_shadow(session_t *ps, win *w, bool shadow_new) {
if (w->shadow == shadow_new)
if (w->shadow == shadow_new) {
return;
}
log_debug("Updating shadow property of window %#010x (%s) to %d", w->id, w->name,
shadow_new);
if (ps->o.experimental_backends && ps->redirected &&
w->state != WSTATE_UNMAPPED && !(w->flags & WIN_FLAGS_IMAGE_ERROR)) {
assert(!w->shadow_image);
// Create shadow image
w->shadow_image = ps->backend_data->ops->render_shadow(
ps->backend_data, w->widthb, w->heightb, ps->gaussian_map, ps->o.shadow_red,
ps->o.shadow_green, ps->o.shadow_blue, ps->o.shadow_opacity);
if (!w->shadow_image) {
log_error("Failed to bind shadow image");
w->shadow_force = OFF;
}
}
region_t extents;
pixman_region32_init(&extents);