# HG changeset patch
# User Jordi Gutiérrez Hermoso <jordigh@octave.org>
# Date 1567991357 14400
# Node ID 10476f40ec9d48b1690493146256dd21de8b2cb1
# Parent  028fd04fcad5a4d69fa7a7a6df6ec81b8492d64a
Tile: add unparse_tile method

The opposite of parse_tile, of course.

diff --git a/tilerswift b/tilerswift
--- a/tilerswift
+++ b/tilerswift
@@ -79,6 +79,13 @@
             rows.append(row)
         return rows
 
+    @classmethod
+    def unparse_tile(cls, rows):
+        """Given an 8x8 array of integers, convert it to a raw tile's bytes."""
+        lowplane = bytes([int(''.join(str(num & 1) for num in row), 2) for row in rows])
+        hiplane = bytes([int(''.join(str((num & 2) >> 1) for num in row), 2) for row in rows])
+        return lowplane + hiplane
+
 
 class GridHolder(object):
     def __init__(self, things, numrows, numcols, fillvalue=None):