Gifsicle的Python 封装

gifsicle的Python封装

感觉gifsicle 还是一款比较强大的gif图片处理软件，功能包括了：

1、对gif中所有帧的任意位置切割；

2、gif中任意帧的修改、分解，并提供多幅gif图片中的任意帧的合并操作

3、gif图片的缩小与放大，包括等比例的缩放。

4、控制gif的循环播放次数以及播放周期

5、and so on

在对Gifsicle的封装过程中，我主要是将其分成两部分（其实整个封装应该是三部分内容），首先是对传入图片的处理，接着对整体的输出图片处理。将每一张需要处理的图片创建一个实例，然后记录对这张图片的操作，最后将其添加进输出图片实例中，并对输出图片的相关修改操作，最后执行convert方法输出图片。

#! /usr/bin/env python# -*- coding: utf-8 -*-__author__ = 'glcsnz123'import osimport matplotlibimport commandsclass GifInfo:#gifsicle -I    def __init__(self, imgfile):        if not os.path.isfile(imgfile): return        self.src = imgfile        self.__rotate = ""        self.__crops = ""        self.__resizes = ""    def resize_gif(self, width=None, height=None):        if width is None and height is None: return False        if width is None:            self.__resizes = " --resize-height %d " % height            return True        if height is None:            self.__resizes = " --resize-width %d " % width            return True        self.__resizes = " --resize %dx%d" % (width, height)        return True    def resize_fit_gif(self, width=None, height=None):        if width is None and height is None: return False        if width is None:            self.__resizes = " --resize-fit-height %d " % (height)            return True        if height is None:            self.__resizes = " --resize-fit-width %d " % (width)            return True        self.__resizes = " --resize-fit %dx%d " % (width, height)        return True    def fix_scale(self, Xscale, Yscale=None):        self.__resizes = " --scale " + str(Xscale / 100.0)        if Yscale is not None:            self.__resizes += "x" + str(Yscale / 100.0)        self.__resizes += " "    def rotate_gif(self, degree=0):        if degree == 90 or degree == "90":            self.__rotate = " --rotate-90 "        elif degree == 180 or degree == "180":            self.__rotate = " --rotate-180 "        elif degree == 270 or degree == "270":            self.__rotate = " --rotate-270 "        else:            return False        return True    def crop_gif_bypos(self, lefttop, rightdown):        if rightdown[0] < lefttop[0] or rightdown[1] < lefttop[1]: return False        self.__crops = " --crop " + ','.join(map(str, lefttop)) + "-" + ",".join(map(str, rightdown)) + " "        return True    def crop_gif_bywh(self, lefttop, wh):        if wh[0] <= 0 or wh[1] <= 0: return False        self.__crops = " --crop " + ",".join(map(str, lefttop)) + "+" + "x".join(map(str, wh)) + " "        return True    def __str__(self):        return " ".join([self.__crops, self.__rotate, self.__resizes, self.src])class Gifsicle:    def __init__(self):        pass    def convert(self, infile, outfile=None):        if outfile is None:            res = commands.getstatusoutput("gifsicle --batch " + str(infile))            if res[0] == 0:                return True            return False        res = commands.getstatusoutput("gifsicle " + str(infile) + " > " + outfile)        if res[0] == 0:            return True        return Falseif __name__ == '__main__':    gi = GifInfo("/home/glcsnz123/images/psb.gif")    gi.crop_gif_bywh((23, 23), (220, 220))    gi.rotate_gif(90)    gi.fix_scale(95, 95)    gf = Gifsicle()    gf.convert(gi, "/home/glcsnz123/images/test.gif")    print str(gi)