1 files changed, 28 insertions, 0 deletions
diff --git a/src/patterns/candycane.c b/src/patterns/candycane.c
new file mode 100644
index 0000000..dbf80de
--- /dev/null
+++ b/src/patterns/candycane.c
@@ -0,0 +1,28 @@
+#include "byte_math.h"
+#include "pattern.h"
+
+static rgb_t get_rgb(uint32_t time, size_t x)
+{
+  int r = 0, g = 0, b = 0;
+
+  uint8_t time8 = time & 0xff;
+  int w = calc_w(time8 + x * 4);
+
+  r = 0xff;
+  g = byte_scale(byte_sin(time8 + x * 2), 0x90);
+  b = byte_scale(byte_sin(time8 + x * 2), 0x20);
+
+  rgb_t color;
+  color.color = 0;
+  color.r = clip(r + w);
+  color.g = clip(byte_scale(g, AS_BYTE(0.75)) + w);
+  color.b = clip(byte_scale(b, AS_BYTE(0.75)) + w);
+  return color;
+}
+
+static void reset(void)
+{
+}
+
+__attribute__((__section__(".patterns"))) volatile static pattern_t pat =
+    ((pattern_t){.get_rgb = get_rgb, .name = "CandyCane", .reset = reset});