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authorThomas Groman <tgroman@nuegia.net>2020-04-20 20:56:28 -0700
committerThomas Groman <tgroman@nuegia.net>2020-04-20 20:56:28 -0700
commit508d270a4d78d491bbe1c67c309c404f547da58a (patch)
treed16e2a906501dcda7b4d268579896f03e125f553 /build/pypng/texttopng
parentf9cab004186edb425a9b88ad649726605080a17c (diff)
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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()