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output-damage: limit the number of damaged rectangles

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emersion 2018-05-05 14:28:55 +01:00
parent a3fd284876
commit 5087199d5d
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2 changed files with 10 additions and 0 deletions
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1
include/wlr/types/wlr_output_damage.h
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@ -23,6 +23,7 @@
*/
struct wlr_output_damage {
struct wlr_output *output;
int max_rects; // max number of damaged rectangles
pixman_region32_t current; // in output-local coordinates

9
types/wlr_output_damage.c
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@ -58,6 +58,7 @@ struct wlr_output_damage *wlr_output_damage_create(struct wlr_output *output) {
}
output_damage->output = output;
output_damage->max_rects = 20;
wl_signal_init(&output_damage->events.frame);
wl_signal_init(&output_damage->events.destroy);
@ -125,6 +126,14 @@ bool wlr_output_damage_make_current(struct wlr_output_damage *output_damage,
int j = (idx + i) % WLR_OUTPUT_DAMAGE_PREVIOUS_LEN;
pixman_region32_union(damage, damage, &output_damage->previous[j]);
}
// Check the number of rectangles
int n_rects = pixman_region32_n_rects(damage);
if (n_rects > output_damage->max_rects) {
pixman_box32_t *extents = pixman_region32_extents(damage);
pixman_region32_union_rect(damage, damage, extents->x1, extents->y1,
extents->x2 - extents->x1, extents->y2 - extents->y1);
}
}
*needs_swap = output->needs_swap || pixman_region32_not_empty(damage);