1 This tool is used to rename the PS name encoded inside the ttf font that we ship 2 with the SDK. There is bug in Java that returns incorrect results for 3 java.awt.Font#layoutGlyphVector() if two fonts with same name but differnt 4 versions are loaded. As a workaround, we rename all the fonts that we ship with 5 the SDK by appending the font version to its name. 6 7 8 The build_font.py copies all files from input_dir to output_dir while renaming 9 the font files (*.ttf) in the process. 10