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annotate transformations/ttf2jpg.py @ 33:6d432a5010a2

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Modified font generator script : module creation. Not fully compliant with testmod.py though (transformation != generation)
author Guillaume Sicard <guitch21@gmail.com>
date Mon, 01 Feb 2010 22:55:19 -0500
parents 424b5b0d9fcb
children 05145f4fb609
rev   line source
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6d432a5010a2 Modified font generator script : module creation. Not fully compliant with testmod.py though (transformation != generation)
Guillaume Sicard <guitch21@gmail.com>
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1 #!/usr/bin/python
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2 # -*- coding: iso-8859-1 -*-
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4 '''
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5 Implementation of font image generator
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6 download fonts from http://www.dafont.com for exemple
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7
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8 Author: Guillaume Sicard
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9 '''
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10
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11 import sys, os, fnmatch
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12 import Image, ImageFont, ImageDraw, numpy
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14 class ttf2jpg():
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15 def __init__(self, font_file = ''):
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16 self.w = 32
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17 self.h = 32
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18 self.font_dir = '/usr/share/fonts/truetype/ttf-liberation/'
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19 self.font_file = font_file
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20 self.image_dir = './images/'
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21 self.pattern = '*.ttf'
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23 # get font name
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24 def get_settings_names(self):
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25 return [self.font_file]
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27 # save an image
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28 def save_image(self,array, filename = ''):
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29 image = (array * 255.0).astype('int')
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30 image = Image.fromarray(image).convert('L')
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31 if (filename != ''):
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32 image.save(filename)
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33 else:
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34 image.show()
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36 # return a picture array of "text" with font "font_file"
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37 def create_image(self, text):
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38 # create a w x h black picture, and a drawing space
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39 image = Image.new('L', (self.w, self.h), 'Black')
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40 draw = ImageDraw.Draw(image)
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42 # load the font with the right size
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43 font = ImageFont.truetype(self.font_file, 28)
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44 d_w,d_h = draw.textsize(text, font=font)
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46 # write text and aligns it
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47 draw.text(((32 - d_w) / 2, ((32 - d_h) / 2)), text, font=font, fill='White')
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49 image = numpy.asarray(image)
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50 image = (image / 255.0).astype(numpy.float32)
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51
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52 return image
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54 # write all the letters and numbers into pictures
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55 def process_font(self):
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56 for i in range(0, 26):
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57 image = self.create_image(chr(ord('a') + i))
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58 self.save_image(image, self.image_dir + chr(ord('a') + i) + '-' + os.path.basename(self.font_file) + '.jpg')
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59 sys.stdout.write('.')
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60 sys.stdout.flush()
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61 for i in range(0, 26):
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62 image = self.create_image(chr(ord('A') + i))
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63 self.save_image(image, self.image_dir + chr(ord('A') + i) + '-' + os.path.basename(self.font_file) + '.jpg')
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64 sys.stdout.write('.')
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65 sys.stdout.flush()
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66 for i in range(0, 10):
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67 image = self.create_image(chr(ord('0') + i))
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68 self.save_image(image, self.image_dir + chr(ord('0') + i) + '-' + os.path.basename(self.font_file) + '.jpg')
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69 sys.stdout.write('.')
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70 sys.stdout.flush()
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71 return (26 + 26 + 10)
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72
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73 # generate the character from the font_file and returns a numpy array
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74 def generate_image(self, character, font_file = ''):
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75 if (font_file != ''):
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76 self.font_file = font_file
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77
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78 return self.create_image(character)
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80 # test method, create character images for all fonts in "font_dir"
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81 def test(self):
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82 import time
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83
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84 # look for ttf files
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85 files = os.listdir(self.font_dir)
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86 font_files = fnmatch.filter(files, self.pattern)
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87
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88 # create "image_dir" if it doesn't exist
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89 if not os.path.isdir(self.image_dir):
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90 os.mkdir(self.image_dir)
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91
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92 sys.stdout.write( str(len(font_files)) + ' fonts found, generating jpg images in folder ' + self.image_dir )
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93 sys.stdout.flush()
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95 # main loop
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96 t = time.time()
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97 n = 0
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99 for font_file in font_files:
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100 self.font_file = self.font_dir + font_file
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101 n += self.process_font()
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102 t = time.time() - t
6
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104 sys.stdout.write('\nall done!\n' + str(n) + ' images generated in ' + str(t) + 's (average : ' + str(1000 * t / n) + ' ms/im)\n')
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106 if __name__ == '__main__':
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107
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108 myttf2jpg = ttf2jpg()
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109 myttf2jpg.test()