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util/region: add wlr_region_scale_xy

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Simon Ser 2020-06-08 17:21:10 +02:00 committed by Drew DeVault
parent 9814213a91
commit 00ccb89288
2 changed files with 13 additions and 5 deletions
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3
include/wlr/util/region.h
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@ -30,6 +30,9 @@
void wlr_region_scale(pixman_region32_t *dst, pixman_region32_t *src,
float scale);
void wlr_region_scale_xy(pixman_region32_t *dst, pixman_region32_t *src,
float scale_x, float scale_y);
/**
* Applies a transform to a region inside a box of size `width` x `height`.
*/

15
util/region.c
View file

@ -7,7 +7,12 @@
void wlr_region_scale(pixman_region32_t *dst, pixman_region32_t *src,
float scale) {
if (scale == 1) {
wlr_region_scale_xy(dst, src, scale, scale);
}
void wlr_region_scale_xy(pixman_region32_t *dst, pixman_region32_t *src,
float scale_x, float scale_y) {
if (scale_x == 1.0 && scale_y == 1.0) {
pixman_region32_copy(dst, src);
return;
}
@ -21,10 +26,10 @@ void wlr_region_scale(pixman_region32_t *dst, pixman_region32_t *src,
}
for (int i = 0; i < nrects; ++i) {
dst_rects[i].x1 = floor(src_rects[i].x1 * scale);
dst_rects[i].x2 = ceil(src_rects[i].x2 * scale);
dst_rects[i].y1 = floor(src_rects[i].y1 * scale);
dst_rects[i].y2 = ceil(src_rects[i].y2 * scale);
dst_rects[i].x1 = floor(src_rects[i].x1 * scale_x);
dst_rects[i].x2 = ceil(src_rects[i].x2 * scale_x);
dst_rects[i].y1 = floor(src_rects[i].y1 * scale_y);
dst_rects[i].y2 = ceil(src_rects[i].y2 * scale_y);
}
pixman_region32_fini(dst);