radio/util/font2png.py

   1 #!/usr/bin/env python
   2 # -*- coding: utf-8 -*-
   3
   4 import sys
   5 try:
   6     from PyQt5 import Qt, QtGui, QtCore
   7 except:
   8     from PyQt4 import Qt, QtGui, QtCore
   9
  10 import glob
  11
  12 app = Qt.QApplication(sys.argv)
  13
  14 for f in glob.glob("fonts/*.ttf"):
  15     QtGui.QFontDatabase.addApplicationFont(f)
  16
  17 chars_en = u""" !"#$%&'()*+,-./0123456789:;<=>?°ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_`abcdefghijklmnopqrstuvwxyz~|≥→←↑↓↗↘↙↖△"""
  18 chars_fr = u"""éèàîç"""
  19 chars_de = u"""ÄäÖöÜüß"""
  20 chars_cz = u"""ěščřžýáíéňóůúďťĚŠČŘŽÝÁÍÉŇÓÚŮĎŤ"""
  21
  22 COUNT_EXTRA_CHARS = 12
  23
  24 chars_extra = u"".join([chr(1+i) for i in range(COUNT_EXTRA_CHARS)])
  25 chars = chars_en + chars_extra + chars_fr + chars_de + chars_cz
  26
  27
  28 def createFontBitmap(filename, fontname, fontsize, fontbold, foreground, background, coordsfile=True):
  29     coords = []
  30     font = QtGui.QFont(fontname)
  31     font.setPixelSize(fontsize)
  32     font.setBold(fontbold)
  33     font.setHintingPreference(QtGui.QFont.PreferNoHinting)
  34     font.setStyleStrategy(QtGui.QFont.PreferAntialias)
  35     metrics = QtGui.QFontMetrics(font)
  36
  37     extraFilename = "fonts/extra_%dpx.png" % fontsize
  38     extraImage = QtGui.QImage(extraFilename)
  39     if extraImage.isNull():
  40         # print("No extra font file", extraFilename)
  41         extraImage = None
  42         extraWidth, extraHeight = 0, 0
  43     else:
  44         extraWidth, extraHeight = extraImage.size().width() / COUNT_EXTRA_CHARS, extraImage.size().height()
  45
  46     def getCharWidth(c):
  47         if c in chars_extra:
  48             return extraWidth
  49         elif c == " ":
  50             return 4
  51         elif c == "." and fontsize <= 8:
  52             return 1
  53         else:
  54             r = metrics.boundingRect(c)
  55             if fontsize >= 24:
  56                 return r.width() + 3
  57             else:
  58                 return r.width() + r.left() + 1
  59
  60     def getFontWidth():
  61         width = 0
  62         for c in chars:
  63             width += getCharWidth(c)
  64         return width
  65
  66     def getFontTopBottom():
  67         top, bottom = 0, 0
  68         for i, c in enumerate(chars):
  69             r = metrics.boundingRect(chars[i])
  70             top = min(top, r.top())
  71             bottom = max(bottom, r.bottom())
  72         return top, bottom
  73
  74     width = getFontWidth()
  75     top, bottom = getFontTopBottom()
  76     image = QtGui.QImage(width, fontsize + 4, QtGui.QImage.Format_RGB32)
  77     image.fill(background)
  78     painter = QtGui.QPainter()
  79     painter.begin(image)
  80     painter.setFont(font)
  81     pen = QtGui.QPen(foreground)
  82     painter.setPen(pen)
  83     width = 0
  84     for c in chars:
  85         coords.append(width)
  86         painter.setOpacity(1.0)
  87         if c in chars_extra:
  88             if extraImage and c == chars_extra[0]:
  89                 for x in range(extraWidth * COUNT_EXTRA_CHARS):
  90                     for y in range(extraHeight):
  91                         rgb = extraImage.pixel(x, y)
  92                         painter.setOpacity(1.0 - float(QtGui.qGray(rgb)) / 256)
  93                         painter.drawPoint(x+width, y)
  94         elif c == " ":
  95             pass
  96         elif c == "." and fontsize <= 8:
  97             painter.drawPoint(width, fontsize)
  98         elif (c == u"↑" or c == u"↓") and fontsize == 16:
  99             rect = metrics.boundingRect(c)
 100             painter.drawText(width - 1, fontsize, c)  # fontsize-bottom+1 -17 / 7
 101         else:
 102             rect = metrics.boundingRect(c)
 103             if fontsize >= 24:
 104                 painter.drawText(width - rect.left() + 1, fontsize - 2, c)  # fontsize-bottom+1 -17 / 7
 105             else:
 106                 painter.drawText(width + 1, fontsize, c)  # fontsize-bottom+1 -17 / 7
 107         width += getCharWidth(c)
 108
 109     coords.append(width)
 110     painter.end()
 111     image.save(filename + ".png")
 112     if coordsfile:
 113         with open(filename + ".specs", "w") as f:
 114             f.write(",".join(str(tmp) for tmp in coords))
 115
 116     return coords
 117
 118 if __name__ == "__main__":
 119     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))