Varia's website
https://varia.zone
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
79 lines
1.9 KiB
79 lines
1.9 KiB
1 week ago
|
#
|
||
|
|
# The Python Imaging Library.
|
||
|
|
# $Id$
|
||
|
|
#
|
||
|
|
# XV Thumbnail file handler by Charles E. "Gene" Cash
|
||
|
|
# (gcash@magicnet.net)
|
||
|
|
#
|
||
|
|
# see xvcolor.c and xvbrowse.c in the sources to John Bradley's XV,
|
||
|
|
# available from ftp://ftp.cis.upenn.edu/pub/xv/
|
||
|
|
#
|
||
|
|
# history:
|
||
|
|
# 98-08-15 cec created (b/w only)
|
||
|
|
# 98-12-09 cec added color palette
|
||
|
|
# 98-12-28 fl added to PIL (with only a few very minor modifications)
|
||
|
|
#
|
||
|
|
# To do:
|
||
|
|
# FIXME: make save work (this requires quantization support)
|
||
|
|
#
|
||
|
|
|
||
|
|
from . import Image, ImageFile, ImagePalette
|
||
|
|
from ._binary import o8
|
||
|
|
|
||
|
|
_MAGIC = b"P7 332"
|
||
|
|
|
||
|
|
# standard color palette for thumbnails (RGB332)
|
||
|
|
PALETTE = b""
|
||
|
|
for r in range(8):
|
||
|
|
for g in range(8):
|
||
|
|
for b in range(4):
|
||
|
|
PALETTE = PALETTE + (
|
||
|
|
o8((r * 255) // 7) + o8((g * 255) // 7) + o8((b * 255) // 3)
|
||
|
|
)
|
||
|
|
|
||
|
|
|
||
|
|
def _accept(prefix):
|
||
|
|
return prefix[:6] == _MAGIC
|
||
|
|
|
||
|
|
|
||
|
|
##
|
||
|
|
# Image plugin for XV thumbnail images.
|
||
|
|
|
||
|
|
|
||
|
|
class XVThumbImageFile(ImageFile.ImageFile):
|
||
|
|
|
||
|
|
format = "XVThumb"
|
||
|
|
format_description = "XV thumbnail image"
|
||
|
|
|
||
|
|
def _open(self):
|
||
|
|
|
||
|
|
# check magic
|
||
|
|
if not _accept(self.fp.read(6)):
|
||
|
|
raise SyntaxError("not an XV thumbnail file")
|
||
|
|
|
||
|
|
# Skip to beginning of next line
|
||
|
|
self.fp.readline()
|
||
|
|
|
||
|
|
# skip info comments
|
||
|
|
while True:
|
||
|
|
s = self.fp.readline()
|
||
|
|
if not s:
|
||
|
|
raise SyntaxError("Unexpected EOF reading XV thumbnail file")
|
||
|
|
if s[0] != 35: # ie. when not a comment: '#'
|
||
|
|
break
|
||
|
|
|
||
|
|
# parse header line (already read)
|
||
|
|
s = s.strip().split()
|
||
|
|
|
||
|
|
self.mode = "P"
|
||
|
|
self._size = int(s[0]), int(s[1])
|
||
|
|
|
||
|
|
self.palette = ImagePalette.raw("RGB", PALETTE)
|
||
|
|
|
||
|
|
self.tile = [("raw", (0, 0) + self.size, self.fp.tell(), (self.mode, 0, 1))]
|
||
|
|
|
||
|
|
|
||
|
|
# --------------------------------------------------------------------
|
||
|
|
|
||
|
|
Image.register_open(XVThumbImageFile.format, XVThumbImageFile, _accept)
|