1 files changed, 9 insertions, 0 deletions
diff --git a/stride.h b/stride.h
new file mode 100644
index 0000000..b2c71a7
--- /dev/null
+++ b/stride.h
@@ -0,0 +1,9 @@
+#pragma once
+
+#include <pixman.h>
+
+static inline int
+stride_for_format_and_width(pixman_format_code_t format, int width)
+{
+    return (((PIXMAN_FORMAT_BPP(format) * width + 7) / 8 + 4 - 1) & -4);
+}