onestroke.py

import Image


def getpix(img, r, g=0, b=0):
    ret = []
    sizex, sizey = img.size
    for x in range(sizex):
        for y in range(sizey):
            _r, _g, _b, _a = img.getpixel((x, y))
            if _r == r and _g == g and _b == b:
                ret.append((x, y))
    return ret


def getstroke(imgfile='picture.png', outfile='stroke.java'):
    img = Image.open(imgfile)
    outf = open(outfile, 'w')
    for b in range(5, 256, 5):
        lst = sorted(getpix(img, r=0,g=0,b=b))
        if len(lst) == 0:
            continue
        outf.write('path = new Path();\n')
        outf.write('this.paths.add(path);\n')
        first = True
        for ele in lst:
            if first:
                func = 'moveTo'
                first = False
            else:
                func = 'lineTo'
            outf.write('path.{0}({1}f, {2}f);\n'.format(func, ele[0], ele[1]))
        outf.write('\n')
    outf.close()