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Add support for background blur

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This patch adds a new config option: colors{,2}.blur=no|yes. When
enabled, transparent background are also blurred.

Note that this requires the brand new ext-background-effect-v1
protocol, and specifically, that the compositor implements the blur
effect.
This commit is contained in:
Daniel Eklöf 2025-10-16 13:43:33 +02:00
parent dc0c8550c3
commit dea10e2e48
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GPG key ID: 5BBD4992C116573F
13 changed files with 154 additions and 43 deletions
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97
wayland.c
View file

@ -1193,6 +1193,27 @@ static const struct zxdg_toplevel_decoration_v1_listener xdg_toplevel_decoration
.configure = &xdg_toplevel_decoration_configure,
};
#if defined(HAVE_EXT_BACKGROUND_EFFECT)
static void
ext_background_capabilities(
void *data,
struct ext_background_effect_manager_v1 *ext_background_effect_manager_v1,
uint32_t flags)
{
struct wayland *wayl = data;
wayl->have_background_blur =
!!(flags & EXT_BACKGROUND_EFFECT_MANAGER_V1_CAPABILITY_BLUR);
LOG_DBG("compositor supports background blur: %s",
wayl->have_background_blur ? "yes" : "no");
}
static const struct ext_background_effect_manager_v1_listener background_manager_listener = {
.capabilities = &ext_background_capabilities,
};
#endif /* HAVE_EXT_BACKGROUND_EFFECT */
static bool
fdm_repeat(struct fdm *fdm, int fd, int events, void *data)
{
@ -1555,6 +1576,20 @@ handle_global(void *data, struct wl_registry *registry,
wayl->registry, name, &xdg_toplevel_tag_manager_v1_interface, required);
}
#endif
#if defined(HAVE_EXT_BACKGROUND_EFFECT)
else if (streq(interface, ext_background_effect_manager_v1_interface.name)) {
const uint32_t required = 1;
if (!verify_iface_version(interface, version, required))
return;
wayl->background_effect_manager = wl_registry_bind(
wayl->registry, name,
&ext_background_effect_manager_v1_interface, required);
ext_background_effect_manager_v1_add_listener(
wayl->background_effect_manager, &background_manager_listener, wayl);
}
#endif
#if defined(FOOT_IME_ENABLED) && FOOT_IME_ENABLED
else if (streq(interface, zwp_text_input_manager_v3_interface.name)) {
@ -1569,6 +1604,7 @@ handle_global(void *data, struct wl_registry *registry,
seat_add_text_input(&it->item);
}
#endif
}
static void
@ -1882,6 +1918,10 @@ wayl_destroy(struct wayland *wayl)
if (wayl->toplevel_tag_manager != NULL)
xdg_toplevel_tag_manager_v1_destroy(wayl->toplevel_tag_manager);
#endif
#if defined(HAVE_EXT_BACKGROUND_EFFECT)
if (wayl->background_effect_manager != NULL)
ext_background_effect_manager_v1_destroy(wayl->background_effect_manager);
#endif
if (wayl->color_management.img_description != NULL)
wp_image_description_v1_destroy(wayl->color_management.img_description);
@ -1986,8 +2026,6 @@ wayl_win_init(struct terminal *term, const char *token)
goto out;
}
wayl_win_alpha_changed(win);
wl_surface_add_listener(win->surface.surf, &surface_listener, win);
if (wayl->fractional_scale_manager != NULL && wayl->viewporter != NULL) {
@ -2000,6 +2038,16 @@ wayl_win_init(struct terminal *term, const char *token)
win->fractional_scale, &fractional_scale_listener, win);
}
#if defined(HAVE_EXT_BACKGROUND_EFFECT)
if (wayl->background_effect_manager != NULL) {
win->surface.background_effect =
ext_background_effect_manager_v1_get_background_effect(
wayl->background_effect_manager, win->surface.surf);
}
#endif
wayl_win_alpha_changed(win);
win->xdg_surface = xdg_wm_base_get_xdg_surface(wayl->shell, win->surface.surf);
xdg_surface_add_listener(win->xdg_surface, &xdg_surface_listener, win);
@ -2206,7 +2254,12 @@ wayl_win_destroy(struct wl_window *win)
free(it->item);
tll_remove(win->xdg_tokens, it);
}
}
#if defined(HAVE_EXT_BACKGROUND_EFFECT)
if (win->surface.background_effect != NULL)
ext_background_effect_surface_v1_destroy(win->surface.background_effect);
#endif
if (win->surface.color_management != NULL)
wp_color_management_surface_v1_destroy(win->surface.color_management);
@ -2446,16 +2499,16 @@ void
wayl_win_alpha_changed(struct wl_window *win)
{
struct terminal *term = win->term;
struct wayland *wayl = term->wl;
/*
* When fullscreened, transparency is disabled (see render.c).
* Update the opaque region to match.
*/
bool is_opaque = term->colors.alpha == 0xffff || win->is_fullscreen;
const bool is_opaque = term->colors.alpha == 0xffff || win->is_fullscreen;
if (is_opaque) {
struct wl_region *region = wl_compositor_create_region(
term->wl->compositor);
struct wl_region *region = wl_compositor_create_region(wayl->compositor);
if (region != NULL) {
wl_region_add(region, 0, 0, INT32_MAX, INT32_MAX);
@ -2464,6 +2517,38 @@ wayl_win_alpha_changed(struct wl_window *win)
}
} else
wl_surface_set_opaque_region(win->surface.surf, NULL);
#if defined(HAVE_EXT_BACKGROUND_EFFECT)
if (term_theme_get(term)->blur) {
if (wayl->have_background_blur) {
xassert(win->surface.background_effect != NULL);
if (is_opaque) {
/* No transparency, disable blur */
LOG_DBG("disabling background blur");
ext_background_effect_surface_v1_set_blur_region(
win->surface.background_effect, NULL);
} else {
/* We have transparency, enable blur if user has enabled it */
struct wl_region *region = wl_compositor_create_region(wayl->compositor);
if (region != NULL) {
LOG_DBG("enabling background blur");
wl_region_add(region, 0, 0, INT32_MAX, INT32_MAX);
ext_background_effect_surface_v1_set_blur_region(
win->surface.background_effect, region);
wl_region_destroy(region);
}
}
} else {
static bool have_warned = false;
if (!have_warned) {
LOG_WARN("background blur requested, but compositor does not support it");
have_warned = true;
}
}
}
#endif /* HAVE_EXT_BACKGROUND_EFFECT */
}
static void