本文整理汇总了Python中PIL.GifImagePlugin.i16方法的典型用法代码示例。如果您正苦于以下问题：Python GifImagePlugin.i16方法的具体用法？Python GifImagePlugin.i16怎么用？Python GifImagePlugin.i16使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类PIL.GifImagePlugin的用法示例。
在下文中一共展示了GifImagePlugin.i16方法的2个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Python代码示例。
示例1: _open
# 需要导入模块: from PIL import GifImagePlugin [as 别名]
# 或者: from PIL.GifImagePlugin import i16 [as 别名]
def _open(self):
# Screen
s = self.fp.read(13)
if s[:6] not in ["GIF87a", "GIF89a"]:
raise SyntaxError, "not a GIF file"
self.info["version"] = s[:6]
self.size = GifImagePlugin.i16(s[6:]), GifImagePlugin.i16(s[8:])
self.tile = []
flags = ord(s[10])
bits = (flags & 7) + 1
if flags & 128:
# get global palette
self.info["background"] = ord(s[11])
# check if palette contains colour indices
p = self.fp.read(3<<bits)
for i in range(0, len(p), 3):
if not (chr(i/3) == p[i] == p[i+1] == p[i+2]):
p = ImagePalette.raw("RGB", p)
self.global_palette = self.palette = p
break
self.__fp = self.fp
self.__rewind = self.fp.tell()
self.seek(0) # get ready to read first frame示例2: seek
# 需要导入模块: from PIL import GifImagePlugin [as 别名]
# 或者: from PIL.GifImagePlugin import i16 [as 别名]
def seek(self, frame):
if frame == 0:
# rewind
self.__offset = 0
self.dispose = None
self.__frame = -1
self.__fp.seek(self.__rewind)
if frame != self.__frame + 1:
raise ValueError, "cannot seek to frame %d" % frame
self.__frame = frame
self.tile = []
self.fp = self.__fp
if self.__offset:
# backup to last frame
self.fp.seek(self.__offset)
while self.data():
pass
self.__offset = 0
if self.dispose:
self.im = self.dispose
self.dispose = None
self.palette = self.global_palette
while 1:
s = self.fp.read(1)
if not s or s == ";":
break
elif s == "!":
#
# extensions
#
s = self.fp.read(1)
block = self.data()
if ord(s) == 249:
#
# graphic control extension
#
flags = ord(block[0])
if flags & 1:
self.info["transparency"] = ord(block[3])
self.info["duration"] = GifImagePlugin.i16(block[1:3]) * 10
try:
# disposal methods
if flags & 8:
# replace with background colour
self.dispose = Image.core.fill("P", self.size,
self.info["background"])
elif flags & 16:
# replace with previous contents
self.dispose = self.im.copy()
except (AttributeError, KeyError):
pass
elif ord(s) == 255:
#
# application extension
#
self.info["extension"] = block, self.fp.tell()
if block[:11] == "NETSCAPE2.0":
block = self.data()
if len(block) >= 3 and ord(block[0]) == 1:
self.info["loop"] = GifImagePlugin.i16(block[1:3])
while self.data():
pass
elif s == ",":
#
# local image
#
s = self.fp.read(9)
# extent
x0, y0 = GifImagePlugin.i16(s[0:]), GifImagePlugin.i16(s[2:])
x, y = GifImagePlugin.i16(s[4:]), GifImagePlugin.i16(s[6:])
x1, y1 = x0 + x, y0 + y
self.info['frame_box'] = (x0,y0,x1,y1)
flags = ord(s[8])
interlace = (flags & 64) != 0
if flags & 128:
bits = (flags & 7) + 1
self.palette =\
ImagePalette.raw("RGB", self.fp.read(3<<bits))
# image data
bits = ord(self.fp.read(1))
self.__offset = self.fp.tell()
self.tile = [("gif",
(x0, y0, x1, y1),
self.__offset,
(bits, interlace))]
break
else:
pass
# raise IOError, "illegal GIF tag `%x`" % ord(s)
if not self.tile:
# self.__fp = None
raise EOFError, "no more images in GIF file"
self.mode = "L"
if self.palette:
self.mode = "P"