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#!/usr/bin/env python
# $URL: http://pypng.googlecode.com/svn/trunk/code/texttopng $
# $Rev: 132 $
# Script to renders text as a PNG image.
from array import array
import itertools
font = {
32: '0000000000000000',
33: '0010101010001000',
34: '0028280000000000',
35: '0000287c287c2800',
36: '00103c5038147810',
37: '0000644810244c00',
38: '0020502054483400',
39: '0010100000000000',
40: '0008101010101008',
41: '0020101010101020',
42: '0010543838541000',
43: '000010107c101000',
44: '0000000000301020',
45: '000000007c000000',
46: '0000000000303000',
47: '0000040810204000',
48: '0038445454443800',
49: '0008180808080800',
50: '0038043840407c00',
51: '003c041804043800',
52: '00081828487c0800',
53: '0078407804047800',
54: '0038407844443800',
55: '007c040810101000',
56: '0038443844443800',
57: '0038443c04040400',
58: '0000303000303000',
59: '0000303000301020',
60: '0004081020100804',
61: '0000007c007c0000',
62: '0040201008102040',
63: '0038440810001000',
64: '00384c545c403800',
65: '0038447c44444400',
66: '0078447844447800',
67: '0038444040443800',
68: '0070484444487000',
69: '007c407840407c00',
70: '007c407840404000',
71: '003844405c443c00',
72: '0044447c44444400',
73: '0038101010103800',
74: '003c040404443800',
75: '0044487048444400',
76: '0040404040407c00',
77: '006c545444444400',
78: '004464544c444400',
79: '0038444444443800',
80: '0078447840404000',
81: '0038444444443c02',
82: '0078447844444400',
83: '0038403804047800',
84: '007c101010101000',
85: '0044444444443c00',
86: '0044444444281000',
87: '0044445454543800',
88: '0042241818244200',
89: '0044443810101000',
90: '007c081020407c00',
91: '0038202020202038',
92: '0000402010080400',
93: '0038080808080838',
94: '0010284400000000',
95: '000000000000fe00',
96: '0040200000000000',
97: '000038043c443c00',
98: '0040784444447800',
99: '0000384040403800',
100: '00043c4444443c00',
101: '000038447c403c00',
102: '0018203820202000',
103: '00003c44443c0438',
104: '0040784444444400',
105: '0010003010101000',
106: '0010003010101020',
107: '0040404870484400',
108: '0030101010101000',
109: '0000385454444400',
110: '0000784444444400',
111: '0000384444443800',
112: '0000784444784040',
113: '00003c44443c0406',
114: '00001c2020202000',
115: '00003c4038047800',
116: '0020203820201800',
117: '0000444444443c00',
118: '0000444444281000',
119: '0000444454543800',
120: '0000442810284400',
121: '00004444443c0438',
122: '00007c0810207c00',
123: '0018202060202018',
124: '0010101000101010',
125: '003008080c080830',
126: '0020540800000000',
}
def char(i):
"""Get image data for the character `i` (a one character string).
Returned as a list of rows. Each row is a tuple containing the
packed pixels.
"""
i = ord(i)
if i not in font:
return [(0,)]*8
return map(lambda row: (ord(row),), font[i].decode('hex'))
def texttoraster(m):
"""Convert string *m* to a raster image (by rendering it using the
font in *font*). A triple of (*width*, *height*, *pixels*) is
returned; *pixels* is in boxed row packed pixel format.
"""
# Assumes monospaced font.
x = 8*len(m)
y = 8
return x,y,itertools.imap(lambda row: itertools.chain(*row),
zip(*map(char, m)))
def render(message, out):
import png
x,y,pixels = texttoraster(message)
w = png.Writer(x, y, greyscale=True, bitdepth=1)
w.write_packed(out, pixels)
out.flush()
def main(argv=None):
import sys
if argv is None:
argv = sys.argv
if len(argv) > 1:
message = argv[1]
else:
message = sys.stdin.read()
render(message, sys.stdout)
if __name__ == '__main__':
main()
|
