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wayland: Minimize work for subsurfaces

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Only commit things that have changed. In the ideal scenario, only
the texture changes from frame to frame, and all the sizing related
setup and the background stay the same, causing the least amount
of work in the compositor.
This commit is contained in:
Matthias Clasen 2024-04-14 22:02:38 -04:00
parent d563d158c0
commit f75b4aac1d
1 changed files with 126 additions and 52 deletions
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110
gdk/wayland/gdksubsurface-wayland.c
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@ -318,6 +318,14 @@ gdk_wayland_subsurface_attach (GdkSubsurface *sub,
double scale;
graphene_rect_t device_rect;
gboolean has_background;
enum wl_output_transform tf;
gboolean dest_changed = FALSE;
gboolean source_changed = FALSE;
gboolean transform_changed = FALSE;
gboolean stacking_changed = FALSE;
gboolean needs_commit = FALSE;
gboolean background_changed = FALSE;
gboolean needs_bg_commit = FALSE;
if (sibling)
will_be_above = sibling->above_parent;
@ -330,22 +338,56 @@ gdk_wayland_subsurface_attach (GdkSubsurface *sub,
return FALSE;
}
if (self->dest.x != dest->origin.x ||
self->dest.y != dest->origin.y ||
self->dest.width != dest->size.width ||
self->dest.height != dest->size.height)
{
self->dest.x = dest->origin.x;
self->dest.y = dest->origin.y;
self->dest.width = dest->size.width;
self->dest.height = dest->size.height;
dest_changed = TRUE;
}
if (!gsk_rect_equal (&self->source, source))
{
self->source.origin.x = source->origin.x;
self->source.origin.y = source->origin.y;
self->source.size.width = source->size.width;
self->source.size.height = source->size.height;
source_changed = TRUE;
}
self->transform = gdk_texture_transform_to_wl (transform);
tf = gdk_texture_transform_to_wl (transform);
if (self->transform != tf)
{
self->transform = tf;
transform_changed = TRUE;
}
if (sibling != gdk_subsurface_get_sibling (sub, above) ||
will_be_above != gdk_subsurface_is_above_parent (sub))
stacking_changed = TRUE;
if (self->texture == NULL)
{
dest_changed = TRUE;
source_changed = TRUE;
transform_changed = TRUE;
stacking_changed = TRUE;
}
scale = gdk_fractional_scale_to_double (&parent->scale);
if (background)
{
background_changed =
!self->bg_attached ||
self->bg_rect.x != background->origin.x ||
self->bg_rect.y != background->origin.y ||
self->bg_rect.width != background->size.width ||
self->bg_rect.height != background->size.height;
self->bg_rect.x = background->origin.x;
self->bg_rect.y = background->origin.y;
self->bg_rect.width = background->size.width;
@ -353,6 +395,7 @@ gdk_wayland_subsurface_attach (GdkSubsurface *sub,
}
else
{
background_changed = self->bg_attached;
self->bg_rect.x = 0;
self->bg_rect.y = 0;
self->bg_rect.width = 0;
@ -361,6 +404,9 @@ gdk_wayland_subsurface_attach (GdkSubsurface *sub,
has_background = self->bg_rect.width > 0 && self->bg_rect.height > 0;
if (has_background)
ensure_bg_surface (self);
if (self->dest.x != dest->origin.x ||
self->dest.y != dest->origin.y ||
self->dest.width != dest->size.width ||
@ -469,15 +515,29 @@ gdk_wayland_subsurface_attach (GdkSubsurface *sub,
}
if (result)
{
if (transform_changed)
{
wl_surface_set_buffer_transform (self->surface, self->transform);
needs_commit = TRUE;
}
if (dest_changed)
{
wl_subsurface_set_position (self->subsurface, self->dest.x, self->dest.y);
wp_viewport_set_destination (self->viewport, self->dest.width, self->dest.height);
needs_commit = TRUE;
}
if (source_changed)
{
wp_viewport_set_source (self->viewport,
wl_fixed_from_double (self->source.origin.x),
wl_fixed_from_double (self->source.origin.y),
wl_fixed_from_double (self->source.size.width),
wl_fixed_from_double (self->source.size.height));
needs_commit = TRUE;
}
if (buffer)
{
@ -486,38 +546,39 @@ gdk_wayland_subsurface_attach (GdkSubsurface *sub,
0, 0,
gdk_texture_get_width (texture),
gdk_texture_get_height (texture));
needs_commit = TRUE;
}
if (has_background)
{
ensure_bg_surface (self);
if (self->bg_surface)
if (background_changed)
{
wl_subsurface_set_position (self->bg_subsurface, self->bg_rect.x, self->bg_rect.y);
wp_viewport_set_destination (self->bg_viewport, self->bg_rect.width, self->bg_rect.height);
wp_viewport_set_source (self->bg_viewport,
wl_fixed_from_int (0),
wl_fixed_from_int (0),
wl_fixed_from_int (1),
wl_fixed_from_int (1));
needs_bg_commit = TRUE;
}
if (!self->bg_attached)
{
self->bg_attached = TRUE;
wp_viewport_set_source (self->bg_viewport,
wl_fixed_from_int (0),
wl_fixed_from_int (0),
wl_fixed_from_int (1),
wl_fixed_from_int (1));
wl_surface_attach (self->bg_surface, get_sp_buffer (self), 0, 0);
wl_surface_damage_buffer (self->bg_surface, 0, 0, 1, 1);
}
needs_bg_commit = TRUE;
}
}
else
{
if (self->bg_surface && self->bg_attached)
if (self->bg_attached)
{
self->bg_attached = FALSE;
wl_surface_attach (self->bg_surface, NULL, 0, 0);
needs_bg_commit = TRUE;
}
}
@ -525,16 +586,22 @@ gdk_wayland_subsurface_attach (GdkSubsurface *sub,
}
else
{
g_set_object (&self->texture, NULL);
if (g_set_object (&self->texture, NULL))
{
wl_surface_attach (self->surface, NULL, 0, 0);
if (self->bg_surface)
needs_commit = TRUE;
}
if (self->bg_attached)
{
self->bg_attached = FALSE;
wl_surface_attach (self->bg_surface, NULL, 0, 0);
needs_bg_commit = TRUE;
}
}
if (stacking_changed)
{
if (sib)
{
if (above)
@ -551,16 +618,23 @@ gdk_wayland_subsurface_attach (GdkSubsurface *sub,
wl_subsurface_place_below (self->subsurface,
GDK_WAYLAND_SURFACE (sub->parent)->display_server.wl_surface);
}
needs_commit = TRUE;
if (self->bg_attached)
{
wl_subsurface_place_below (self->bg_subsurface, self->surface);
needs_bg_commit = TRUE;
}
}
if (needs_commit)
wl_surface_commit (self->surface);
if (self->bg_surface)
if (needs_bg_commit)
wl_surface_commit (self->bg_surface);
((GdkWaylandSurface *)sub->parent)->has_pending_subsurface_commits = TRUE;
GDK_WAYLAND_SURFACE (sub->parent)->opaque_region_dirty = TRUE;
((GdkWaylandSurface *)sub->parent)->has_pending_subsurface_commits = needs_commit || needs_bg_commit;
GDK_WAYLAND_SURFACE (sub->parent)->opaque_region_dirty = stacking_changed || dest_changed || background_changed;
return result;
}