mirror of
https://github.com/nicoverbruggen/kobo-font-fix.git
synced 2026-04-01 15:00:08 +02:00
Nico Verbruggen
eee6b0d739
- Fixes script - Adds kern diff script to compare fonts to helpers - Moved ttfconv to helpers folder - Updated README
65 lines
2.3 KiB
Python
65 lines
2.3 KiB
Python
#!/usr/bin/env python3
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import sys
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from fontTools.ttLib import TTFont
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def analyze_kern_table(font_path):
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"""
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Loads a font and analyzes its 'kern' table, if present.
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"""
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try:
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font = TTFont(font_path)
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except Exception as e:
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print(f"Error: Could not open font file at {font_path}. Reason: {e}")
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return
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print(f"--- Analyzing 'kern' table in: {font_path} ---")
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if 'kern' not in font:
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print("No 'kern' table found.")
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return
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kern_table = font['kern']
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print(f" > Table version: {kern_table.version}")
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if not hasattr(kern_table, 'kernTables') or not kern_table.kernTables:
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print(" > No subtables found.")
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return
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print(f" > Number of subtables: {len(kern_table.kernTables)}")
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for i, subtable in enumerate(kern_table.kernTables):
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print(f"\n --- Subtable {i+1} ---")
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if hasattr(subtable, 'coverage'):
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print(f" > Coverage flags (as integer): {subtable.coverage}")
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# A more detailed breakdown of flags
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coverage_int = int(subtable.coverage)
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print(f" > Coverage flags breakdown:")
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print(f" - Horizontal Kerning: {'Yes' if coverage_int & 1 else 'No'} (bit 0)")
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print(f" - Minimum Values: {'Yes' if coverage_int & 2 else 'No'} (bit 1)")
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print(f" - Cross-stream Kerning: {'Yes' if coverage_int & 4 else 'No'} (bit 2)")
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print(f" - Variation Kerning: {'Yes' if coverage_int & 8 else 'No'} (bit 3)")
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if hasattr(subtable, 'kernTable'):
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print(f" > Found {len(subtable.kernTable)} kerning pairs.")
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# Print the first 20 kerning pairs and values for inspection
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print(" > Sample of kerning pairs (glyph1, glyph2) -> value:")
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for pair, value in list(subtable.kernTable.items())[:20]:
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print(f" - ({pair[0]}, {pair[1]}) -> {value}")
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else:
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print(" > Subtable has no 'kernTable' attribute.")
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def main():
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"""
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Main function to compare two fonts.
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"""
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# Replace these with the actual paths to your font files
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working_font = "./KC_Garamond-Regular.ttf"
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broken_font = "./KF_Garamond-Regular.ttf"
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analyze_kern_table(working_font)
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print("\n" + "="*50 + "\n")
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analyze_kern_table(broken_font)
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if __name__ == "__main__":
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main() |