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gdk: Handle subsurface opaque region with transparency

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We accept transparent subsurfaces for passthrough now, when they are
above the surface.
But we did not unset the opaque region to empty when the texture is
transprent.
This commit is contained in:
Benjamin Otte 2023-12-04 22:11:55 +01:00
parent 19171c7a89
commit 9bc0ad9a13
1 changed files with 19 additions and 0 deletions
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19
gdk/wayland/gdksubsurface-wayland.c
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@ -237,11 +237,29 @@ gdk_wayland_subsurface_attach (GdkSubsurface *sub,
}
else
{
gboolean was_transparent;
if (self->texture)
was_transparent = gdk_memory_format_alpha (gdk_texture_get_format (self->texture)) != GDK_MEMORY_ALPHA_OPAQUE;
else
was_transparent = FALSE;
if (g_set_object (&self->texture, texture))
{
buffer = get_wl_buffer (self, texture);
if (buffer != NULL)
{
gboolean is_transparent;
is_transparent = gdk_memory_format_alpha (gdk_texture_get_format (texture)) != GDK_MEMORY_ALPHA_OPAQUE;
if (is_transparent != was_transparent)
{
if (is_transparent)
wl_surface_set_opaque_region (self->surface, NULL);
else
wl_surface_set_opaque_region (self->surface, self->opaque_region);
}
GDK_DISPLAY_DEBUG (gdk_surface_get_display (sub->parent), OFFLOAD,
"Attached %dx%d texture to subsurface %p at %d %d %d %d",
gdk_texture_get_width (texture),
@ -339,6 +357,7 @@ gdk_wayland_subsurface_detach (GdkSubsurface *sub)
g_set_object (&self->texture, NULL);
wl_surface_attach (self->surface, NULL, 0, 0);
wl_surface_set_opaque_region (self->surface, self->opaque_region);
wl_surface_commit (self->surface);
((GdkWaylandSurface *)sub->parent)->has_pending_subsurface_commits = TRUE;