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util/region: add wlr_region_scale_xy
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9814213a91
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2 changed files with 13 additions and 5 deletions
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@ -30,6 +30,9 @@
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void wlr_region_scale(pixman_region32_t *dst, pixman_region32_t *src,
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float scale);
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void wlr_region_scale_xy(pixman_region32_t *dst, pixman_region32_t *src,
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float scale_x, float scale_y);
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/**
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* Applies a transform to a region inside a box of size `width` x `height`.
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*/
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@ -7,7 +7,12 @@
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void wlr_region_scale(pixman_region32_t *dst, pixman_region32_t *src,
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float scale) {
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if (scale == 1) {
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wlr_region_scale_xy(dst, src, scale, scale);
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}
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void wlr_region_scale_xy(pixman_region32_t *dst, pixman_region32_t *src,
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float scale_x, float scale_y) {
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if (scale_x == 1.0 && scale_y == 1.0) {
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pixman_region32_copy(dst, src);
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return;
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}
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@ -21,10 +26,10 @@ void wlr_region_scale(pixman_region32_t *dst, pixman_region32_t *src,
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}
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for (int i = 0; i < nrects; ++i) {
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dst_rects[i].x1 = floor(src_rects[i].x1 * scale);
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dst_rects[i].x2 = ceil(src_rects[i].x2 * scale);
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dst_rects[i].y1 = floor(src_rects[i].y1 * scale);
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dst_rects[i].y2 = ceil(src_rects[i].y2 * scale);
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dst_rects[i].x1 = floor(src_rects[i].x1 * scale_x);
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dst_rects[i].x2 = ceil(src_rects[i].x2 * scale_x);
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dst_rects[i].y1 = floor(src_rects[i].y1 * scale_y);
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dst_rects[i].y2 = ceil(src_rects[i].y2 * scale_y);
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}
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pixman_region32_fini(dst);
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