diff options
Diffstat (limited to 'util')
| -rw-r--r-- | util/meson.build | 2 | ||||
| -rw-r--r-- | util/region.c | 130 |
2 files changed, 132 insertions, 0 deletions
diff --git a/util/meson.build b/util/meson.build index 21930693..34aa428b 100644 --- a/util/meson.build +++ b/util/meson.build @@ -3,6 +3,8 @@ lib_wlr_util = static_library( files( 'log.c', 'os-compatibility.c', + 'region.c', ), include_directories: wlr_inc, + dependencies: [wayland_server, pixman], ) diff --git a/util/region.c b/util/region.c new file mode 100644 index 00000000..1bde0cb8 --- /dev/null +++ b/util/region.c @@ -0,0 +1,130 @@ +#include <stdlib.h> +#include <math.h> +#include <wlr/util/region.h> + +void wlr_region_scale(pixman_region32_t *dst, pixman_region32_t *src, + float scale) { + if (scale == 1) { + 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 = 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); + } + + pixman_region32_fini(dst); + pixman_region32_init_rects(dst, dst_rects, nrects); + free(dst_rects); +} + +void wlr_region_transform(pixman_region32_t *dst, pixman_region32_t *src, + enum wl_output_transform transform, int width, int height) { + if (transform == WL_OUTPUT_TRANSFORM_NORMAL) { + 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) { + switch (transform) { + case WL_OUTPUT_TRANSFORM_NORMAL: + dst_rects[i].x1 = src_rects[i].x1; + dst_rects[i].y1 = src_rects[i].y1; + dst_rects[i].x2 = src_rects[i].x2; + dst_rects[i].y2 = src_rects[i].y2; + break; + case WL_OUTPUT_TRANSFORM_90: + dst_rects[i].x1 = src_rects[i].y1; + dst_rects[i].y1 = width - src_rects[i].x2; + dst_rects[i].x2 = src_rects[i].y2; + dst_rects[i].y2 = width - src_rects[i].x1; + break; + case WL_OUTPUT_TRANSFORM_180: + dst_rects[i].x1 = width - src_rects[i].x2; + dst_rects[i].y1 = height - src_rects[i].y2; + dst_rects[i].x2 = width - src_rects[i].x1; + dst_rects[i].y2 = height - src_rects[i].y1; + break; + case WL_OUTPUT_TRANSFORM_270: + dst_rects[i].x1 = height - src_rects[i].y2; + dst_rects[i].y1 = src_rects[i].x1; + dst_rects[i].x2 = height - src_rects[i].y1; + dst_rects[i].y2 = src_rects[i].x2; + break; + case WL_OUTPUT_TRANSFORM_FLIPPED: + dst_rects[i].x1 = width - src_rects[i].x2; + dst_rects[i].y1 = src_rects[i].y1; + dst_rects[i].x2 = width - src_rects[i].x1; + dst_rects[i].y2 = src_rects[i].y2; + break; + case WL_OUTPUT_TRANSFORM_FLIPPED_90: + dst_rects[i].x1 = height - src_rects[i].y2; + dst_rects[i].y1 = width - src_rects[i].x2; + dst_rects[i].x2 = height - src_rects[i].y1; + dst_rects[i].y2 = width - src_rects[i].x1; + break; + case WL_OUTPUT_TRANSFORM_FLIPPED_180: + dst_rects[i].x1 = src_rects[i].x1; + dst_rects[i].y1 = height - src_rects[i].y2; + dst_rects[i].x2 = src_rects[i].x2; + dst_rects[i].y2 = height - src_rects[i].y1; + break; + case WL_OUTPUT_TRANSFORM_FLIPPED_270: + dst_rects[i].x1 = src_rects[i].y1; + dst_rects[i].y1 = src_rects[i].x1; + dst_rects[i].x2 = src_rects[i].y2; + dst_rects[i].y2 = src_rects[i].x2; + break; + } + } + + pixman_region32_fini(dst); + 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); +} |