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roundedclip: Implement get_opaque_rect

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This takes both the vertical and horizontal rectangle that isn't
covering the rounded corners and intersects both with the child's opaque
rect.
And then it returns the larger of the two.

This means the small slices of a window near the left/right (or
top/bottom) will never be covered, but if we wanted that, we'd need to
use something else than a rectangle - either a region or actually a
rounded rect.

But that is a lot more expensive to implement.
This commit is contained in:
Benjamin Otte 2024-07-07 18:45:00 +02:00
parent 1014b3d972
commit 355a88d002
1 changed files with 34 additions and 0 deletions
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34
gsk/gskrendernodeimpl.c
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@ -4621,6 +4621,39 @@ gsk_rounded_clip_node_diff (GskRenderNode *node1,
}
}
static gboolean
gsk_rounded_clip_node_get_opaque_rect (GskRenderNode *node,
graphene_rect_t *opaque)
{
GskRoundedClipNode *self = (GskRoundedClipNode *) node;
graphene_rect_t child_opaque, wide_opaque, high_opaque;
double start, end;
if (!gsk_render_node_get_opaque_rect (self->child, &child_opaque))
return FALSE;
wide_opaque = self->clip.bounds;
start = MAX(self->clip.corner[GSK_CORNER_TOP_LEFT].height, self->clip.corner[GSK_CORNER_TOP_RIGHT].height);
end = MAX(self->clip.corner[GSK_CORNER_BOTTOM_LEFT].height, self->clip.corner[GSK_CORNER_BOTTOM_RIGHT].height);
wide_opaque.size.height -= MIN (wide_opaque.size.height, start + end);
wide_opaque.origin.y += start;
graphene_rect_intersection (&wide_opaque, &child_opaque, &wide_opaque);
high_opaque = self->clip.bounds;
start = MAX(self->clip.corner[GSK_CORNER_TOP_LEFT].width, self->clip.corner[GSK_CORNER_BOTTOM_LEFT].width);
end = MAX(self->clip.corner[GSK_CORNER_TOP_RIGHT].width, self->clip.corner[GSK_CORNER_BOTTOM_RIGHT].width);
high_opaque.size.width -= MIN (high_opaque.size.width, start + end);
high_opaque.origin.x += start;
graphene_rect_intersection (&high_opaque, &child_opaque, &high_opaque);
if (wide_opaque.size.width * wide_opaque.size.height > high_opaque.size.width * high_opaque.size.height)
*opaque = wide_opaque;
else
*opaque = high_opaque;
return TRUE;
}
static void
gsk_rounded_clip_node_class_init (gpointer g_class,
gpointer class_data)
@ -4632,6 +4665,7 @@ gsk_rounded_clip_node_class_init (gpointer g_class,
node_class->finalize = gsk_rounded_clip_node_finalize;
node_class->draw = gsk_rounded_clip_node_draw;
node_class->diff = gsk_rounded_clip_node_diff;
node_class->get_opaque_rect = gsk_rounded_clip_node_get_opaque_rect;
}
/**