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gsk: Track disjointness of container nodes

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This can be used to optimize some things in the
GL renderer.
This commit is contained in:
Matthias Clasen 2022-04-03 19:28:53 -04:00
parent af20f7e9b5
commit 0eba21b2b5
2 changed files with 23 additions and 0 deletions
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21
gsk/gskrendernodeimpl.c
View File

@ -2576,6 +2576,7 @@ struct _GskContainerNode
{
GskRenderNode render_node;
gboolean disjoint;
guint n_children;
GskRenderNode **children;
};
@ -2724,6 +2725,7 @@ gsk_container_node_new (GskRenderNode **children,
self = gsk_render_node_alloc (GSK_CONTAINER_NODE);
node = (GskRenderNode *) self;
self->disjoint = TRUE;
self->n_children = n_children;
if (n_children == 0)
@ -2743,6 +2745,7 @@ gsk_container_node_new (GskRenderNode **children,
for (guint i = 1; i < n_children; i++)
{
self->children[i] = gsk_render_node_ref (children[i]);
self->disjoint &= !graphene_rect_intersection (&bounds, &(children[i]->bounds), NULL);
graphene_rect_union (&bounds, &(children[i]->bounds), &bounds);
node->prefers_high_depth |= gsk_render_node_prefers_high_depth (children[i]);
}
@ -2801,6 +2804,24 @@ gsk_container_node_get_children (const GskRenderNode *node,
return self->children;
}
/*< private>
* gsk_container_node_is_disjoint:
* @node: a container `GskRenderNode`
*
* Returns `TRUE` if it is known that the child nodes are not
* overlapping. There is no guarantee that they do overlap
* if this function return FALSE.
*
* Returns: `TRUE` if children don't overlap
*/
gboolean
gsk_container_node_is_disjoint (const GskRenderNode *node)
{
const GskContainerNode *self = (const GskContainerNode *) node;
return self->disjoint;
}
/*** GSK_TRANSFORM_NODE ***/
/**

2
gsk/gskrendernodeprivate.h
View File

@ -113,6 +113,8 @@ void gsk_transform_node_get_translate (const GskRenderNode *no
float *dy);
gboolean gsk_render_node_prefers_high_depth (const GskRenderNode *node);
gboolean gsk_container_node_is_disjoint (const GskRenderNode *node);
G_END_DECLS