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30 lines
746 B
30 lines
746 B
7 years ago
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#include <stdlib.h>
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#include <math.h>
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#include <wlr/util/region.h>
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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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pixman_region32_copy(dst, src);
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return;
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}
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int nrects;
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pixman_box32_t *src_rects = pixman_region32_rectangles(src, &nrects);
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pixman_box32_t *dst_rects = malloc(nrects * sizeof(pixman_box32_t));
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if (dst_rects == NULL) {
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return;
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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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}
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pixman_region32_fini(dst);
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pixman_region32_init_rects(dst, dst_rects, nrects);
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}
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