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rootston: fix urxvt damage on HiDPI outputs

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util/region: add wlr_region_expand
This commit is contained in:
emersion 2018-01-30 12:01:10 +01:00
parent d498855b9d
commit 2a855e6282
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GPG key ID: 0FDE7BE0E88F5E48
3 changed files with 40 additions and 0 deletions
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7
include/wlr/util/region.h
View file

@ -19,4 +19,11 @@ void wlr_region_scale(pixman_region32_t *dst, pixman_region32_t *src,
void wlr_region_transform(pixman_region32_t *dst, pixman_region32_t *src,
enum wl_output_transform transform, int width, int height);
/**
* Expands the region of `distance`. If `distance` is negative, it shrinks the
* region.
*/
void wlr_region_expand(pixman_region32_t *dst, pixman_region32_t *src,
int distance);
#endif

6
rootston/output.c
View file

@ -600,6 +600,12 @@ static void damage_from_surface(struct wlr_surface *surface,
pixman_region32_init(&damage);
pixman_region32_copy(&damage, &surface->current->surface_damage);
wlr_region_scale(&damage, &damage, output->wlr_output->scale);
if (ceil(output->wlr_output->scale) > surface->current->scale) {
// When scaling up a surface, it'll become blurry so we need to expand
// the damage region
wlr_region_expand(&damage, &damage,
ceil(output->wlr_output->scale) - surface->current->scale);
}
pixman_region32_translate(&damage, box.x, box.y);
pixman_region32_union(&output->damage, &output->damage, &damage);
pixman_region32_fini(&damage);

27
util/region.c
View file

@ -101,3 +101,30 @@ void wlr_region_transform(pixman_region32_t *dst, pixman_region32_t *src,
pixman_region32_init_rects(dst, dst_rects, nrects);
free(dst_rects);
}
void wlr_region_expand(pixman_region32_t *dst, pixman_region32_t *src,
int distance) {
if (distance == 0) {
pixman_region32_copy(dst, src);
return;
}
int nrects;
pixman_box32_t *src_rects = pixman_region32_rectangles(src, &nrects);
pixman_box32_t *dst_rects = malloc(nrects * sizeof(pixman_box32_t));
if (dst_rects == NULL) {
return;
}
for (int i = 0; i < nrects; ++i) {
dst_rects[i].x1 = src_rects[i].x1 - distance;
dst_rects[i].x2 = src_rects[i].x2 + distance;
dst_rects[i].y1 = src_rects[i].y1 - distance;
dst_rects[i].y2 = src_rects[i].y2 + distance;
}
pixman_region32_fini(dst);
pixman_region32_init_rects(dst, dst_rects, nrects);
free(dst_rects);
}