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scene: ignore outputs with too small intersection with nodes

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If a node has a very small intersection with an output, there's no
point in trying to adapt the node's rendering to that output.
This commit is contained in:
Simon Ser 2025-06-05 11:45:56 +02:00 • committed by Kenny Levinsen
parent da820070f4
commit 95b2771bfd
1 changed files with 7 additions and 4 deletions
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11
types/scene/wlr_scene.c
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@ -424,6 +424,8 @@ static void update_node_update_outputs(struct wlr_scene_node *node,
size_t count = 0;
uint64_t active_outputs = 0;
uint32_t visible_area = region_area(&node->visible);
// let's update the outputs in two steps:
// - the primary outputs
// - the enter/leave signals
@ -451,9 +453,12 @@ static void update_node_update_outputs(struct wlr_scene_node *node,
pixman_region32_init(&intersection);
pixman_region32_intersect_rect(&intersection, &node->visible,
output_box.x, output_box.y, output_box.width, output_box.height);
uint32_t overlap = region_area(&intersection);
pixman_region32_fini(&intersection);
if (!pixman_region32_empty(&intersection)) {
uint32_t overlap = region_area(&intersection);
// If the overlap accounts for less than 10% of the visible node area,
// ignore this output
if (overlap >= 0.1 * visible_area) {
if (overlap >= largest_overlap) {
largest_overlap = overlap;
scene_buffer->primary_output = scene_output;
@ -462,8 +467,6 @@ static void update_node_update_outputs(struct wlr_scene_node *node,
active_outputs |= 1ull << scene_output->index;
count++;
}
pixman_region32_fini(&intersection);
}
if (old_primary_output != scene_buffer->primary_output) {