1 files changed, 21 insertions, 0 deletions
diff --git a/include/byte_math.h b/include/byte_math.h
index 79f93b8..9be4b67 100644
--- a/include/byte_math.h
+++ b/include/byte_math.h
@@ -13,3 +13,24 @@ static inline uint8_t byte_sin(uint8_t n)
 }
 
 uint8_t calc_w(uint8_t n);
+
+static inline uint8_t byte_scale(uint8_t v, uint8_t scale)
+{
+  uint16_t acc = v;
+  return (acc * scale) >> 8;
+}
+
+static inline uint8_t clip(int x)
+{
+  if (x > 240) {
+    return 240;
+  }
+
+  if (x < 0) {
+    return 0;
+  }
+
+  return (uint8_t)x;
+}
+
+#define AS_BYTE(n) ((n) * 256)