remove unused code

1 files changed, 0 insertions, 34 deletions

diff --git a/util/png.py b/util/png.py
deleted file mode 100644
index 3a750c0..0000000
--- a/util/png.py
+++ /dev/null
@@ -1,34 +0,0 @@
-import struct
-import zlib
-
-
-def encode(buf, width, height):
-    """ buf: must be bytes or a bytearray in py3, a regular string in py2. formatted RGBRGB... """
-    assert (width * height * 3 == len(buf))
-    bpp = 3
-
-    def raw_data():
-        # reverse the vertical line order and add null bytes at the start
-        row_bytes = width * bpp
-        for row_start in range((height - 1) * width * bpp, -1, -row_bytes):
-            yield b'\x00'
-            yield buf[row_start:row_start + row_bytes]
-
-    def chunk(tag, data):
-        return [
-            struct.pack("!I", len(data)),
-            tag,
-            data,
-            struct.pack("!I", 0xFFFFFFFF & zlib.crc32(data, zlib.crc32(tag)))
-            ]
-
-    SIGNATURE = b'\x89PNG\r\n\x1a\n'
-    COLOR_TYPE_RGB = 2
-    COLOR_TYPE_RGBA = 6
-    bit_depth = 8
-    return b''.join(
-      [SIGNATURE] +
-      chunk(b'IHDR', struct.pack("!2I5B", width, height, bit_depth, COLOR_TYPE_RGB, 0, 0, 0)) +
-      chunk(b'IDAT', zlib.compress(b''.join(raw_data()), 9)) +
-      chunk(b'IEND', b'')
-    )