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output-damage: set needs swap only when we have new damage 

An output needs swap when there is new damage. If the damage is only
accumulated from the last frame, we could simply skip drawing.
This commit is contained in:
Ilia Bozhinov 2019-06-24 16:57:45 +02:00 committed by Simon Ser
parent d10072e76c
commit fb739b8293
1 changed files with 3 additions and 1 deletions
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4
types/wlr_output_damage.c
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@ -144,6 +144,8 @@ bool wlr_output_damage_attach_render(struct wlr_output_damage *output_damage,
return false;
}
*needs_frame =
output->needs_frame || pixman_region32_not_empty(&output_damage->current);
// Check if we can use damage tracking
if (buffer_age <= 0 || buffer_age - 1 > WLR_OUTPUT_DAMAGE_PREVIOUS_LEN) {
int width, height;
@ -151,6 +153,7 @@ bool wlr_output_damage_attach_render(struct wlr_output_damage *output_damage,
// Buffer new or too old, damage the whole output
pixman_region32_union_rect(damage, damage, 0, 0, width, height);
*needs_frame = true;
} else {
pixman_region32_copy(damage, &output_damage->current);
@ -170,7 +173,6 @@ bool wlr_output_damage_attach_render(struct wlr_output_damage *output_damage,
}
}
*needs_frame = output->needs_frame || pixman_region32_not_empty(damage);
return true;
}