Encoder fixes

cc-pic.py

@@ -76,12 +76,12 @@ class Converter:
     def export_binary(self, io: BinaryIO):
         io.write(b"CCPI")
         io.write(bytes([self._img.width // 2, self._img.height // 3, 0]))
-        io.write(bytes(self._palette))
+        io.write(bytes(self._palette[: 16 * 3]))
         for y in range(0, self._img.height - 2, 3):
             for x in range(0, self._img.width - 1, 2):
                 ch, bg, fg = self._get_block(x, y)
                 io.write(bytes([
-                    ch & 0xFF,
+                    (ch + 0x80) & 0xFF,
                     fg << 4 | bg
                 ]))