Add snippet manipulating raw table data

Snippets/edit_raw_table_data.py

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+from fontTools.ttLib import TTFont
+from fontTools.ttLib.tables.DefaultTable import DefaultTable
+
+font_path = "myfont.ttf"
+output_path = "myfont_patched.ttf"
+
+table_tag = "DSIG"
+
+
+# Get raw table data from the source font
+
+font = TTFont(font_path)
+raw_data = font.getTableData(table_tag)
+
+
+# Do something with the raw table data
+# This example just sets an empty DSIG table.
+
+raw_data = "\0\0\0\1\0\0\0\0"
+
+
+# Write the data back to the font
+
+# We could re-use the existing table when the source and target font are
+# identical, but let's make a new empty table to be more universal.
+table = DefaultTable(table_tag)
+table.data = raw_data
+
+# Add the new table back into the source font and save under a new name.
+font[table_tag] = table
+font.save(output_path)