1 files changed, 39 insertions, 0 deletions
diff --git a/libs/cairo/src/cairo-slope-private.h b/libs/cairo/src/cairo-slope-private.h
new file mode 100644
index 000000000..bccc955d3
--- /dev/null
+++ b/libs/cairo/src/cairo-slope-private.h
@@ -0,0 +1,39 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef _CAIRO_SLOPE_PRIVATE_H
+#define _CAIRO_SLOPE_PRIVATE_H
+
+#include "cairo-types-private.h"
+#include "cairo-fixed-private.h"
+
+static inline void
+_cairo_slope_init (cairo_slope_t *slope,
+		   const cairo_point_t *a,
+		   const cairo_point_t *b)
+{
+    slope->dx = b->x - a->x;
+    slope->dy = b->y - a->y;
+}
+
+static inline cairo_bool_t
+_cairo_slope_equal (const cairo_slope_t *a, const cairo_slope_t *b)
+{
+    return _cairo_int64_eq (_cairo_int32x32_64_mul (a->dy, b->dx),
+			    _cairo_int32x32_64_mul (b->dy, a->dx));
+}
+
+static inline cairo_bool_t
+_cairo_slope_backwards (const cairo_slope_t *a, const cairo_slope_t *b)
+{
+    return _cairo_int64_negative (_cairo_int64_add (_cairo_int32x32_64_mul (a->dx, b->dx),
+						    _cairo_int32x32_64_mul (a->dy, b->dy)));
+}
+
+cairo_private int
+_cairo_slope_compare (const cairo_slope_t *a,
+	              const cairo_slope_t *b) cairo_pure;
+
+
+#endif /* _CAIRO_SLOPE_PRIVATE_H */