1 files changed, 75 insertions, 0 deletions
diff --git a/base/base_rect.c b/base/base_rect.c
new file mode 100644
index 00000000..18acb952
--- /dev/null
+++ b/base/base_rect.c
@@ -0,0 +1,75 @@
+#include <fitz.h>
+
+fz_rect fz_infiniterect = { 1, 1, -1, -1 };
+fz_rect fz_emptyrect = { 0, 0, 0, 0 };
+
+static fz_irect infinite = { 1, 1, -1, -1 };
+static fz_irect empty = { 0, 0, 0, 0 };
+
+fz_irect
+fz_roundrect(fz_rect f)
+{
+	fz_irect i;
+	i.x0 = fz_floor(f.x0);
+	i.y0 = fz_floor(f.y0);
+	i.x1 = fz_ceil(f.x1);
+	i.y1 = fz_ceil(f.y1);
+	return i;
+}
+
+fz_rect
+fz_intersectrects(fz_rect a, fz_rect b)
+{
+	fz_rect r;
+	if (fz_isinfiniterect(a)) return b;
+	if (fz_isinfiniterect(b)) return a;
+	r.x0 = MAX(a.x0, b.x0);
+	r.y0 = MAX(a.y0, b.y0);
+	r.x1 = MIN(a.x1, b.x1);
+	r.y1 = MIN(a.y1, b.y1);
+	return (r.x1 < r.x0 || r.y1 < r.y0) ? fz_emptyrect : r;
+}
+
+fz_rect
+fz_mergerects(fz_rect a, fz_rect b)
+{
+	fz_rect r;
+	if (fz_isinfiniterect(a) || fz_isinfiniterect(b))
+		return fz_infiniterect;
+	if (fz_isemptyrect(a)) return b;
+	if (fz_isemptyrect(b)) return a;
+	r.x0 = MIN(a.x0, b.x0);
+	r.y0 = MIN(a.y0, b.y0);
+	r.x1 = MAX(a.x1, b.x1);
+	r.y1 = MAX(a.y1, b.y1);
+	return r;
+}
+
+fz_irect
+fz_intersectirects(fz_irect a, fz_irect b)
+{
+	fz_irect r;
+	if (fz_isinfiniterect(a)) return b;
+	if (fz_isinfiniterect(b)) return a;
+	r.x0 = MAX(a.x0, b.x0);
+	r.y0 = MAX(a.y0, b.y0);
+	r.x1 = MIN(a.x1, b.x1);
+	r.y1 = MIN(a.y1, b.y1);
+	return (r.x1 < r.x0 || r.y1 < r.y0) ? empty : r;
+}
+
+fz_irect
+fz_mergeirects(fz_irect a, fz_irect b)
+{
+	fz_irect r;
+	if (fz_isinfiniterect(a) || fz_isinfiniterect(b))
+		return infinite;
+	if (fz_isemptyrect(a)) return b;
+	if (fz_isemptyrect(b)) return a;
+	r.x0 = MIN(a.x0, b.x0);
+	r.y0 = MIN(a.y0, b.y0);
+	r.x1 = MAX(a.x1, b.x1);
+	r.y1 = MAX(a.y1, b.y1);
+	return r;
+}
+