radio/util/font2png.py

   1 #!/usr/bin/env python
   2 # -*- coding: utf-8 -*-
   3
   4 import sys
   5 from PyQt4 import Qt, QtCore, QtGui
   6 import glob
   7
   8 app = Qt.QApplication(sys.argv)
   9
  10 for f in glob.glob("fonts/*.ttf"):
  11     QtGui.QFontDatabase.addApplicationFont(f)
  12
  13 chars_en = u""" !"#$%&'()*+,-./0123456789:;<=>?°ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_`abcdefghijklmnopqrstuvwxyz~|≥→←↑↓↗↘↙↖△"""
  14 chars_fr = u"""éèàîç"""
  15 chars_de = u"""ÄäÖöÜüß"""
  16 chars_cz = u"""ěščřžýáíéňóůúďťĚŠČŘŽÝÁÍÉŇÓÚŮĎŤ"""
  17
  18 COUNT_EXTRA_CHARS = 12
  19
  20 chars_extra = u"".join([chr(1+i) for i in range(COUNT_EXTRA_CHARS)])
  21 chars = chars_en + chars_extra + chars_fr + chars_de + chars_cz
  22
  23
  24 def createFontBitmap(filename, fontname, fontsize, fontbold, foreground, background, coordsfile=True):
  25     coords = []
  26     font = QtGui.QFont(fontname)
  27     font.setPixelSize(fontsize)
  28     font.setBold(fontbold)
  29     font.setHintingPreference(QtGui.QFont.PreferNoHinting)
  30     font.setStyleStrategy(QtGui.QFont.PreferAntialias)
  31     metrics = QtGui.QFontMetrics(font)
  32
  33     extraFilename = "fonts/extra_%dpx.png" % fontsize
  34     extraImage = QtGui.QImage(extraFilename)
  35     if extraImage.isNull():
  36         # print("No extra font file", extraFilename)
  37         extraImage = None
  38         extraWidth, extraHeight = 0, 0
  39     else:
  40         extraWidth, extraHeight = extraImage.size().width() / COUNT_EXTRA_CHARS, extraImage.size().height()
  41
  42     def getCharWidth(c):
  43         if c in chars_extra:
  44             return extraWidth
  45         elif c == " ":
  46             return 4
  47         elif c == "." and fontsize <= 8:
  48             return 1
  49         else:
  50             r = metrics.boundingRect(c)
  51             if fontsize >= 24:
  52                 return r.width() + 3
  53             else:
  54                 return r.width() + r.left() + 1
  55
  56     def getFontWidth():
  57         width = 0
  58         for c in chars:
  59             width += getCharWidth(c)
  60         return width
  61
  62     def getFontTopBottom():
  63         top, bottom = 0, 0
  64         for i, c in enumerate(chars):
  65             r = metrics.boundingRect(chars[i])
  66             top = min(top, r.top())
  67             bottom = max(bottom, r.bottom())
  68         return top, bottom
  69
  70     width = getFontWidth()
  71     top, bottom = getFontTopBottom()
  72     image = QtGui.QImage(width, fontsize + 4, QtGui.QImage.Format_RGB32)
  73     image.fill(background)
  74     painter = QtGui.QPainter()
  75     painter.begin(image)
  76     painter.setFont(font)
  77     pen = QtGui.QPen(foreground)
  78     painter.setPen(pen)
  79     width = 0
  80     for c in chars:
  81         coords.append(width)
  82         painter.setOpacity(1.0)
  83         if c in chars_extra:
  84             if extraImage and c == chars_extra[0]:
  85                 for x in range(extraWidth * COUNT_EXTRA_CHARS):
  86                     for y in range(extraHeight):
  87                         rgb = extraImage.pixel(x, y)
  88                         painter.setOpacity(1.0 - float(QtGui.qGray(rgb)) / 256)
  89                         painter.drawPoint(x+width, y)
  90         elif c == " ":
  91             pass
  92         elif c == "." and fontsize <= 8:
  93             painter.drawPoint(width, fontsize)
  94         elif (c == u"↑" or c == u"↓") and fontsize == 16:
  95             rect = metrics.boundingRect(c)
  96             painter.drawText(width - 1, fontsize, c)  # fontsize-bottom+1 -17 / 7
  97         else:
  98             rect = metrics.boundingRect(c)
  99             if fontsize >= 24:
 100                 painter.drawText(width - rect.left() + 1, fontsize - 2, c)  # fontsize-bottom+1 -17 / 7
 101             else:
 102                 painter.drawText(width + 1, fontsize, c)  # fontsize-bottom+1 -17 / 7
 103         width += getCharWidth(c)
 104
 105     coords.append(width)
 106     painter.end()
 107     image.save(filename + ".png")
 108     if coordsfile:
 109         with open(filename + ".specs", "w") as f:
 110             f.write(",".join(str(tmp) for tmp in coords))
 111
 112     return coords
 113
 114 if __name__ == "__main__":
 115     createFontBitmap(sys.argv[4], sys.argv[1], float(sys.argv[2]), sys.argv[3] == "True", QtGui.QColor(0x00, 0x00, 0x00), QtGui.QColor(0xFF, 0xFF, 0xFF))