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| 1 | #!/usr/bin/env python2 |
| 2 | # Converts Linux font character array to PNG. |
| 3 | |
| 4 | import sys |
| 5 | # Python Imaging Library |
| 6 | # http://www.pythonware.com/products/pil/ |
| 7 | import Image |
| 8 | |
| 9 | def readSource(inp): |
| 10 | data = [] |
| 11 | meta = {} |
| 12 | inData = False |
| 13 | inMeta = False |
| 14 | for line in inp.readlines(): |
| 15 | csta = line.find('/*') |
| 16 | if csta != -1: |
| 17 | cend = line.index('*/') + 2 |
| 18 | line = line[ : csta] + line[cend : ] |
| 19 | line = line.strip() |
| 20 | if inData: |
| 21 | if line == '};': |
| 22 | inData = False |
| 23 | elif line: |
| 24 | valStr = line.rstrip(',') |
| 25 | # Chars wider than 8 not supported yet. |
| 26 | assert ',' not in valStr |
| 27 | data.append(int(valStr, 16)) |
| 28 | elif inMeta: |
| 29 | if line == '};': |
| 30 | inMeta = False |
| 31 | elif line: |
| 32 | key, value = line.split('=') |
| 33 | key = key.strip().lstrip('.') |
| 34 | value = value.strip().rstrip(',') |
| 35 | meta[key] = value |
| 36 | elif line.startswith('static const unsigned char'): |
| 37 | assert line[-1] == '{' |
| 38 | inData = True |
| 39 | elif line.startswith('const struct font_desc'): |
| 40 | assert line[-1] == '{' |
| 41 | inMeta = True |
| 42 | return data, meta |
| 43 | |
| 44 | def createImage(width, height, data): |
| 45 | assert len(data) == height * 256 |
| 46 | |
| 47 | # Reserve space for a 32 * 8 grid of characters. |
| 48 | image = Image.new('P', (32 * (width + 1) + 1, 8 * (height + 1) + 1)) |
| 49 | palette = [0, 0, 0] * 256 |
| 50 | palette[3 : 6] = [255, 255, 255] # foreground |
| 51 | palette[6 : 9] = [128, 0, 0] # grid |
| 52 | image.putpalette(palette) |
| 53 | |
| 54 | # Draw grid. |
| 55 | for y in xrange(0, image.size[1], height + 1): |
| 56 | for x in xrange(0, image.size[0]): |
| 57 | image.putpixel((x, y), 2) |
| 58 | for x in xrange(0, image.size[0], width + 1): |
| 59 | for y in xrange(0, image.size[1]): |
| 60 | image.putpixel((x, y), 2) |
| 61 | |
| 62 | # Draw characters. |
| 63 | for c in xrange(256): |
| 64 | row, col = divmod(c, 32) |
| 65 | y = 1 + row * (height + 1) |
| 66 | for i in xrange(c * height, (c + 1) * height): |
| 67 | x = 1 + col * (width + 1) |
| 68 | pat = data[i] |
| 69 | for bit in xrange(width): |
| 70 | if pat & 128: |
| 71 | image.putpixel((x, y), 1) |
| 72 | pat <<= 1 |
| 73 | x += 1 |
| 74 | y += 1 |
| 75 | return image |
| 76 | |
| 77 | if len(sys.argv) != 2: |
| 78 | print >>sys.stderr, 'Usage: python font2png.py <source_file>' |
| 79 | sys.exit(2) |
| 80 | else: |
| 81 | fileName = sys.argv[1] |
| 82 | assert fileName.endswith('.c') |
| 83 | outFileName = fileName[ : -2] + '.png' |
| 84 | |
| 85 | inp = open(fileName, 'r') |
| 86 | try: |
| 87 | data, meta = readSource(inp) |
| 88 | finally: |
| 89 | inp.close() |
| 90 | width = int(meta['width']) |
| 91 | height = int(meta['height']) |
| 92 | image = createImage(width, height, data) |
| 93 | image.save(outFileName) |
| 94 |
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