Merge pull request #571 from emersion/output-damage

Output damage tracking

1 files changed, 29 insertions, 0 deletions

diff --git a/include/wlr/util/region.h b/include/wlr/util/region.h
new file mode 100644
index 00000000..7883af97
--- /dev/null
+++ b/include/wlr/util/region.h
@@ -0,0 +1,29 @@
+#ifndef WLR_UTIL_REGION_H
+#define WLR_UTIL_REGION_H
+
+#include <pixman.h>
+#include <wayland-server.h>
+
+/**
+ * Scales a region, ie. multiplies all its coordinates by `scale`.
+ *
+ * The resulting coordinates are rounded up or down so that the new region is
+ * at least as big as the original one.
+ */
+void wlr_region_scale(pixman_region32_t *dst, pixman_region32_t *src,
+	float scale);
+
+/**
+ * Applies a transform to a region inside a box of size `width` x `height`.
+ */
+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