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scene: Set color representation on scanout

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When doing direct-scanout, if the surface has color-representation
metadata present then pass on that metadata to the output state.

Also, if a buffer has color representation IDENTITY+FULL then normalise
this to NONE+NONE which is equivalent.
This commit is contained in:
David Turner 2026-02-10 17:11:45 +00:00
parent 58c158dba6
commit 80bcef908b
1 changed files with 12 additions and 9 deletions
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21
types/scene/wlr_scene.c
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@ -2057,15 +2057,6 @@ static enum scene_direct_scanout_result scene_entry_try_direct_scanout(
return SCANOUT_INELIGIBLE;
}
bool is_color_repr_none = buffer->color_encoding == WLR_COLOR_ENCODING_NONE &&
buffer->color_range == WLR_COLOR_RANGE_NONE;
bool is_color_repr_identity_full = buffer->color_encoding == WLR_COLOR_ENCODING_IDENTITY &&
buffer->color_range == WLR_COLOR_RANGE_FULL;
if (!(is_color_repr_none || is_color_repr_identity_full)) {
return SCANOUT_INELIGIBLE;
}
// We want to ensure optimal buffer selection, but as direct-scanout can be enabled and disabled
// on a frame-by-frame basis, we wait for a few frames to send the new format recommendations.
// Maybe we should only send feedback in this case if tests fail.
@ -2107,6 +2098,18 @@ static enum scene_direct_scanout_result scene_entry_try_direct_scanout(
if (buffer->wait_timeline != NULL) {
wlr_output_state_set_wait_timeline(&pending, buffer->wait_timeline, buffer->wait_point);
}
if (buffer->color_encoding == WLR_COLOR_ENCODING_IDENTITY &&
buffer->color_range == WLR_COLOR_RANGE_FULL) {
// IDENTITY+FULL (used for RGB formats) is equivalent to no color
// representation being set at all.
wlr_output_state_set_color_encoding_and_range(&pending,
WLR_COLOR_ENCODING_NONE, WLR_COLOR_RANGE_NONE);
} else {
wlr_output_state_set_color_encoding_and_range(&pending,
buffer->color_encoding, buffer->color_range);
}
if (!wlr_output_test_state(scene_output->output, &pending)) {
wlr_output_state_finish(&pending);
return SCANOUT_CANDIDATE;