1 files changed, 71 insertions, 0 deletions
diff --git a/source/blender/datatoc/datatoc_icon_split_to_png.py b/source/blender/datatoc/datatoc_icon_split_to_png.py
new file mode 100755
index 00000000000..39bbf1110fb
--- /dev/null
+++ b/source/blender/datatoc/datatoc_icon_split_to_png.py
@@ -0,0 +1,71 @@
+#!/usr/bin/env python3
+
+# ##### BEGIN GPL LICENSE BLOCK #####
+#
+#  This program is free software; you can redistribute it and/or
+#  modify it under the terms of the GNU General Public License
+#  as published by the Free Software Foundation; either version 2
+#  of the License, or (at your option) any later version.
+#
+#  This program is distributed in the hope that it will be useful,
+#  but WITHOUT ANY WARRANTY; without even the implied warranty of
+#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#  GNU General Public License for more details.
+#
+#  You should have received a copy of the GNU General Public License
+#  along with this program; if not, write to the Free Software Foundation,
+#  Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+#
+# ##### END GPL LICENSE BLOCK #####
+
+# This script is just to view the icons
+
+
+def write_png(buf, width, height):
+    import zlib
+    import struct
+    # reverse the vertical line order and add null bytes at the start
+    width_byte_4 = width * 4
+    raw_data = b"".join(b'\x00' + buf[span:span + width_byte_4] for span in range((height - 1) * width * 4, -1, - width_byte_4))
+
+    def png_pack(png_tag, data):
+        chunk_head = png_tag + data
+        return struct.pack("!I", len(data)) + chunk_head + struct.pack("!I", 0xFFFFFFFF & zlib.crc32(chunk_head))
+
+    return b"".join([
+        b'\x89PNG\r\n\x1a\n',
+        png_pack(b'IHDR', struct.pack("!2I5B", width, height, 8, 6, 0, 0, 0)),
+        png_pack(b'IDAT', zlib.compress(raw_data, 9)),
+        png_pack(b'IEND', b'')])
+
+
+def icondata_to_png(file_src, file_dst):
+    import struct
+
+    with open(file_src, 'rb') as f_src:
+        # 2 ints
+        temp_data = f_src.read(4 * 2)
+        w, h = struct.unpack('<2I', temp_data)
+        temp_data = f_src.read(4 * 2)  # (x, y)         - ignored
+        temp_data = f_src.read(4 * 2)  # (xfrom, yfrom) - ignored
+        # pixels
+        temp_data = f_src.read(w * h * 4)
+
+    buf = write_png(temp_data, w, h)
+
+    with open(file_dst, 'wb') as f_dst:
+        f_dst.write(buf)
+
+
+def main():
+    import sys
+    import os
+
+    for arg in sys.argv[1:]:
+        file_src = arg
+        file_dst = os.path.splitext(arg)[0] + ".png"
+
+        icondata_to_png(file_src, file_dst)
+
+if __name__ == "__main__":
+    main()