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backend/wayland: only re-order sub-surfaces when necessary

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This commit is contained in:
Simon Ser 2023-02-21 09:38:41 +01:00 committed by Isaac Freund
parent e00c4cd7dc
commit e8a2f76eb4
1 changed files with 22 additions and 2 deletions
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24
backend/wayland/output.c
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@ -345,6 +345,25 @@ static struct wlr_wl_output_layer *get_or_create_output_layer(
return layer; return layer;
} }
static bool has_layers_order_changed(struct wlr_wl_output *output,
struct wlr_output_layer_state *layers, size_t layers_len) {
size_t i = 0;
struct wlr_output_layer *layer;
wl_list_for_each(layer, &output->wlr_output.layers, link) {
if (i >= layers_len) {
return true;
}
const struct wlr_output_layer_state *layer_state = &layers[i];
if (layer_state->layer != layer) {
return true;
}
i++;
}
return i != layers_len;
}
static bool output_layer_commit(struct wlr_wl_output *output, static bool output_layer_commit(struct wlr_wl_output *output,
struct wlr_wl_output_layer *layer, struct wlr_wl_output_layer *layer,
const struct wlr_output_layer_state *state) { const struct wlr_output_layer_state *state) {
@ -372,6 +391,8 @@ static bool commit_layers(struct wlr_wl_output *output,
return true; return true;
} }
bool reordered = has_layers_order_changed(output, layers, layers_len);
struct wlr_wl_output_layer *prev_layer = NULL; struct wlr_wl_output_layer *prev_layer = NULL;
for (size_t i = 0; i < layers_len; i++) { for (size_t i = 0; i < layers_len; i++) {
struct wlr_wl_output_layer *layer = struct wlr_wl_output_layer *layer =
@ -388,8 +409,7 @@ static bool commit_layers(struct wlr_wl_output *output,
continue; continue;
} }
// TODO: only do this if layers were re-ordered if (prev_layer != NULL && reordered) {
if (prev_layer != NULL) {
wl_subsurface_place_above(layer->subsurface, wl_subsurface_place_above(layer->subsurface,
prev_layer->surface); prev_layer->surface);
} }