61 lines
1.6 KiB
Python
61 lines
1.6 KiB
Python
#!/usr/bin/env python
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import argparse
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import colours
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import fontdata
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parser = argparse.ArgumentParser()
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parser.add_argument('font', help='Text file describing the font')
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parser.add_argument('start', help='First codepoint')
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parser.add_argument('end', help='Last codepoint')
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parsed = parser.parse_args()
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with open(parsed.font) as f:
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char_width, char_height, atlas = fontdata.parse(f)
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if parsed.start[0:2] == 'U+':
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codepoint_start = int(parsed.start[2:], 16)
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else:
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codepoint_start = ord(parsed.start)
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if parsed.end[0:2] == 'U+':
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codepoint_end = int(parsed.end[2:], 16)
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else:
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codepoint_end = ord(parsed.end)
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descenders = 3
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diacritics = 3
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baseline = (char_height - 1) - descenders - 1 # Enough space for descenders + 1 empty line
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capheight = baseline - diacritics
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x_height = 6
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lines = [baseline, baseline - x_height, baseline - capheight]
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start_row = codepoint_start // 16
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end_row = codepoint_end // 16
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columns = 16
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rows = end_row - start_row + 1
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width = char_width * columns
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height = char_height * rows
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filename = f'{codepoint_start:04X}-{codepoint_end:04X}.ppm'
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with open(filename, 'wb') as f:
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f.write(f'P6\n{width} {height}\n255\n'.encode())
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for row in range(rows):
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for y in range(char_height):
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for column in range(columns):
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codepoint = (start_row + row) * 16 + column
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if codepoint < codepoint_start or codepoint_end < codepoint:
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f.write(colours.notchar * char_width)
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continue
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if y in lines:
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bg = colours.line
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elif (row + column) % 2 == 0:
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bg = colours.bg1
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else:
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bg = colours.bg2
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for x in range(char_width):
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if codepoint in atlas and atlas[codepoint][y][x]:
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f.write(colours.fg)
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else:
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f.write(bg)
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