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gpu: Chceck if a container node is opaque as fallback

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Sometimes container nodes contain lots of overlapping opaque items. In
that case we can use the container node itself as the first node even
though none of the children cover the whole paint area.

The use case for this is a grid of cells like in a terminal where all
the cells are opaque and we want to avoid drawing the background behind
them.
This commit is contained in:
Benjamin Otte
2024-07-08 20:59:25 +02:00
parent 8a61b01c06
commit 155f7cdeec
1 changed files with 22 additions and 7 deletions
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29
gsk/gpu/gskgpunodeprocessor.c
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@@ -3036,26 +3036,41 @@ gsk_gpu_node_processor_add_first_container_node (GskGpuNodeProcessor *se
GskRenderPassType pass_type,
GskRenderNode *node)
{
gsize i, n;
int i, n;
n = gsk_container_node_get_n_children (node);
if (n == 0)
return FALSE;
for (i = n - 1; ; i--)
for (i = n; i-->0; )
{
if (gsk_gpu_node_processor_add_first_node (self,
target,
clip,
pass_type,
gsk_container_node_get_child (node, i)))
break;
if (i == 0)
return FALSE;
break;
}
for (i = i + 1; i < n; i++)
if (i < 0)
{
graphene_rect_t opaque, clip_bounds;
if (!gsk_render_node_get_opaque_rect (node, &opaque))
return FALSE;
gsk_gpu_node_processor_get_clip_bounds (self, &clip_bounds);
if (!gsk_rect_contains_rect (&opaque, &clip_bounds))
return FALSE;
gsk_gpu_render_pass_begin_op (self->frame,
target,
clip,
&GDK_RGBA_TRANSPARENT,
pass_type);
}
for (i++; i < n; i++)
gsk_gpu_node_processor_add_node (self, gsk_container_node_get_child (node, i));
return TRUE;