Initial commit

src/wang.h

@@ -0,0 +1,30 @@
+#pragma once
+
+struct wang_header {
+    // First 16-byte chunk
+    uint8_t magic[6]; // "wang\0\0"
+    uint8_t flash_map;
+    uint8_t marquee_map;
+    uint8_t speed_and_mode[8];
+
+    // Second 16-byte chunk
+    uint16_t widths[8];
+
+    // Third 16-byte chunk
+    uint8_t padding[6];
+    uint8_t time[6];
+    uint8_t padding2[4];
+
+    // Fourth 16-byte chunk, empty
+    uint8_t blank[16];
+};
+
+// Receive some data in wang format
+void wang_rx(const uint8_t *, int);
+
+extern struct wang_header flash_header;
+extern int flash_header_valid;
+void wang_init(void);
+void wang_render(int index, struct row_buf *output);
+
+void wang_read(int index, int offset, int width, uint16_t *buf);