def get_thumbnail_image(filename, size='normal', autoSave = True):
source_image_name = filename
thumbnail_image_name = get_thumbnail_image_name(filename,size)
thumbnail_size = get_thumbnail_image_size(size)
thumbnail_crop = get_thumbnail_image_crop(size)
# 检查缩略图是否存在
storage = get_storage()
thumbs_storage = get_thumbs_storage()
exists = thumbs_storage.exists(thumbnail_image_name)
if exists:
#print "storage exists file~~",thumbnail_image_name
return thumbnail_image_name
try:
exists = storage.exists(source_image_name)
if not exists:
print "storage not exists source file >_< ",source_image_name
return thumbnail_image_name
source_file = storage.open(filename)
# 实例PIl对象
im = Image.open(source_file.file)
format = Image.EXTENSION.get(thumbnail_image_name, 'PNG')
if im.info.has_key("duration") and 0:
# 动态gif图
original_duration = im.info['duration']
#frames = [frame.copy() for i, frame in enumerate(iter_frames(im))]
#frames = [scale_and_crop(frame, thumbnail_size) for i, frame in enumerate(iter_frames(im))]
frames = []
for i, frame in enumerate(iter_frames(im)):
frame = colorspace(frame)
frame = autocrop(frame)
frame = scale_and_crop(frame, thumbnail_size)
frames.append(frame)
#frames.reverse()
i=0
for frame in frames:
i+=1
#frame.thumbnail((72,72))
output = StringIO()
img_data = images2gif.writeGif(output, frames, duration=original_duration/1000.0, dither=0)
thumbnail_file = thumbs_storage.save(thumbnail_image_name,img_data)
else:
im = colorspace(im)
im = autocrop(im)
im = scale_and_crop(im, thumbnail_size, thumbnail_crop)
output = StringIO()
im.save(output, format)
is_transparent = is_transparent_image(im)
if is_transparent:
img_data = output.getvalue()
else:
img_data = im.tostring('jpeg', 'RGB')
output.close()
thumbnail_file = thumbs_storage.save(thumbnail_image_name,img_data)
except Exception, e:
raise
def writeGifToFile(self, fp, images, durations, loops, xys, disposes):
""" writeGifToFile(fp, images, durations, loops, xys, disposes)
Given a set of images writes the bytes to the specified stream.
"""
# Obtain palette for all images and count each occurance
palettes, occur = [], []
for im in images:
palettes.append( getheader(im)[1] )
for palette in palettes:
occur.append( palettes.count( palette ) )
# Select most-used palette as the global one (or first in case no max)
globalPalette = palettes[ occur.index(max(occur)) ]
# Init
frames = 0
firstFrame = True
for im, palette in zip(images, palettes):
if firstFrame:
# Write header
# Gather info
header = self.getheaderAnim(im)
appext = self.getAppExt(loops)
# Write
fp.write(header)
fp.write(globalPalette)
fp.write(appext)
# Next frame is not the first
firstFrame = False
if True:
# Write palette and image data
# Gather info
data = getdata(im)
imdes, data = data[0], data[1:]
graphext = self.getGraphicsControlExt(durations[frames],
disposes[frames])
# Make image descriptor suitable for using 256 local color palette
lid = self.getImageDescriptor(im, xys[frames])
# Write local header
if (palette != globalPalette) or (disposes[frames] != 2):
# Use local color palette
fp.write(graphext)
fp.write(lid) # write suitable image descriptor
fp.write(palette) # write local color table
fp.write('\x08') # LZW minimum size code
else:
# Use global color palette
fp.write(graphext)
fp.write(imdes) # write suitable image descriptor
# Write image data
for d in data:
fp.write(d)
# Prepare for next round
frames = frames + 1
img_data = fp.getvalue()
return img_data
return frames
storage = get_storage()
img_data = fp.getvalue()
thumbnail_file = storage.save("1.gif",img_data)
fp.write(";") # end gif
print fp
print type(fp)
