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Diffstat (limited to 'release/bin/blender-thumbnailer.py')
| -rwxr-xr-x | release/bin/blender-thumbnailer.py | 193 |
1 files changed, 0 insertions, 193 deletions
diff --git a/release/bin/blender-thumbnailer.py b/release/bin/blender-thumbnailer.py deleted file mode 100755 index e050a681ca0..00000000000 --- a/release/bin/blender-thumbnailer.py +++ /dev/null @@ -1,193 +0,0 @@ -#!/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 ##### - -# <pep8 compliant> - -""" -Thumbnailer runs with python 2.7 and 3.x. -To run automatically with a file manager such as Nautilus, save this file -in a directory that is listed in PATH environment variable, and create -blender.thumbnailer file in ${HOME}/.local/share/thumbnailers/ directory -with the following contents: - -[Thumbnailer Entry] -TryExec=blender-thumbnailer.py -Exec=blender-thumbnailer.py %u %o -MimeType=application/x-blender; -""" - -import struct - - -def open_wrapper_get(): - """ wrap OS specific read functionality here, fallback to 'open()' - """ - - class GFileWrapper: - __slots__ = ("mode", "g_file") - - def __init__(self, url, mode='r'): - self.mode = mode # used in gzip module - self.g_file = Gio.File.parse_name(url).read(None) - - def read(self, size): - return self.g_file.read_bytes(size, None).get_data() - - def seek(self, offset, whence=0): - self.g_file.seek(offset, [1, 0, 2][whence], None) - return self.g_file.tell() - - def tell(self): - return self.g_file.tell() - - def close(self): - self.g_file.close(None) - - def open_local_url(url, mode='r'): - o = urlparse(url) - if o.scheme == '': - path = o.path - elif o.scheme == 'file': - path = unquote(o.path) - else: - raise(IOError('URL scheme "%s" needs gi.repository.Gio module' % o.scheme)) - return open(path, mode) - - try: - from gi.repository import Gio - return GFileWrapper - except ImportError: - try: - # Python 3 - from urllib.parse import urlparse, unquote - except ImportError: - # Python 2 - from urlparse import urlparse - from urllib import unquote - return open_local_url - - -def blend_extract_thumb(path): - import os - open_wrapper = open_wrapper_get() - - REND = b'REND' - TEST = b'TEST' - - blendfile = open_wrapper(path, 'rb') - - head = blendfile.read(12) - - if head[0:2] == b'\x1f\x8b': # gzip magic - import gzip - blendfile.close() - blendfile = gzip.GzipFile('', 'rb', 0, open_wrapper(path, 'rb')) - head = blendfile.read(12) - - if not head.startswith(b'BLENDER'): - blendfile.close() - return None, 0, 0 - - is_64_bit = (head[7] == b'-'[0]) - - # true for PPC, false for X86 - is_big_endian = (head[8] == b'V'[0]) - - # blender pre 2.5 had no thumbs - if head[9:11] <= b'24': - return None, 0, 0 - - sizeof_bhead = 24 if is_64_bit else 20 - int_endian = '>i' if is_big_endian else '<i' - int_endian_pair = int_endian + 'i' - - while True: - bhead = blendfile.read(sizeof_bhead) - - if len(bhead) < sizeof_bhead: - return None, 0, 0 - - code = bhead[:4] - length = struct.unpack(int_endian, bhead[4:8])[0] # 4 == sizeof(int) - - if code == REND: - blendfile.seek(length, os.SEEK_CUR) - else: - break - - if code != TEST: - return None, 0, 0 - - try: - x, y = struct.unpack(int_endian_pair, blendfile.read(8)) # 8 == sizeof(int) * 2 - except struct.error: - return None, 0, 0 - - length -= 8 # sizeof(int) * 2 - - if length != x * y * 4: - return None, 0, 0 - - image_buffer = blendfile.read(length) - - if len(image_buffer) != length: - return None, 0, 0 - - return image_buffer, x, y - - -def write_png(buf, width, height): - import zlib - - # 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 main(): - import sys - - if len(sys.argv) < 3: - print("Expected 2 arguments <input.blend> <output.png>") - else: - file_in = sys.argv[-2] - - buf, width, height = blend_extract_thumb(file_in) - - if buf: - file_out = sys.argv[-1] - - f = open(file_out, "wb") - f.write(write_png(buf, width, height)) - f.close() - - -if __name__ == '__main__': - main() |