Update Xolonium sources to version 4.2

[xonotic/mediasource.git] / fonts / xolonium / tools / clean-font.py

diff --git a/fonts/xolonium/tools/clean-font.py b/fonts/xolonium/tools/clean-font.py
new file mode 100755 (executable)
index 0000000..2addd7d
--- /dev/null
+++ b/fonts/xolonium/tools/clean-font.py
@@ -0,0 +1,57 @@
+#!/usr/bin/env python3
+# Cleans up font produced by FontForge.
+
+import sys
+from fontTools.ttLib import TTFont
+from fontTools.feaLib import builder as feaBuilder
+
+
+# Read arguments
+SOURCE   = sys.argv[1] # *.otf|*.ttf
+FEATURES = sys.argv[2] # *.fea
+TARGET   = sys.argv[3] # *.otf|*.ttf
+
+
+# Load font
+font = TTFont(SOURCE)
+tmpFont = TTFont(SOURCE)
+
+
+# Remove FontForge FFTM table
+if 'FFTM' in font: del font['FFTM']
+
+
+# Compile the GSUB table with FontTools,
+# but retain the GPOS table from FontForge
+if 'GPOS' in tmpFont: del tmpFont['GPOS']
+if 'GSUB' in tmpFont: del tmpFont['GSUB']
+
+feaBuilder.addOpenTypeFeatures(tmpFont, FEATURES)
+font['GSUB'] = tmpFont['GSUB']
+
+
+# Remove characters with a period in their name
+# from the kern table, because they do not have a
+# unicode mapping, which can cause problems on Windows
+if 'kern' in font:
+       for kernTable in font['kern'].kernTables:
+               kernSubTable = kernTable.kernTable
+               pairsToRemove = []
+
+               # Search for problematic characters
+               for pair in kernSubTable:
+                       if "." in pair[0] or "." in pair[1]:
+                               pairsToRemove.append(pair)
+
+               # Remove problematic characters
+               for pair in pairsToRemove:
+                       kernSubTable.pop(pair)
+
+
+# Calculate correct OS/2.xAvgCharWidth
+widths = [m[0] for m in font['hmtx'].metrics.values() if m[0] > 0]
+font['OS/2'].xAvgCharWidth = int(round(sum(widths) / len(widths)))
+
+
+# Save font
+font.save(TARGET)