1#!/usr/bin/env python 2# -*- coding: utf-8 -*- 3 4from __future__ import print_function, division, absolute_import 5 6import sys 7import array 8from gi.repository import HarfBuzz as hb 9from gi.repository import GLib 10 11# Python 2/3 compatibility 12try: 13 unicode 14except NameError: 15 unicode = str 16 17def tounicode(s, encoding='utf-8'): 18 if not isinstance(s, unicode): 19 return s.decode(encoding) 20 else: 21 return s 22 23fontdata = open (sys.argv[1], 'rb').read () 24text = tounicode(sys.argv[2]) 25# Need to create GLib.Bytes explicitly until this bug is fixed: 26# https://bugzilla.gnome.org/show_bug.cgi?id=729541 27blob = hb.glib_blob_create (GLib.Bytes.new (fontdata)) 28face = hb.face_create (blob, 0) 29del blob 30font = hb.font_create (face) 31upem = hb.face_get_upem (face) 32del face 33hb.font_set_scale (font, upem, upem) 34#hb.ft_font_set_funcs (font) 35hb.ot_font_set_funcs (font) 36 37buf = hb.buffer_create () 38class Debugger(object): 39 def message (self, buf, font, msg, data, _x_what_is_this): 40 print(msg) 41 return True 42debugger = Debugger() 43hb.buffer_set_message_func (buf, debugger.message, 1, 0) 44 45## 46## Add text to buffer 47## 48# 49# See https://github.com/harfbuzz/harfbuzz/pull/271 50# 51if False: 52 # If you do not care about cluster values reflecting Python 53 # string indices, then this is quickest way to add text to 54 # buffer: 55 hb.buffer_add_utf8 (buf, text.encode('utf-8'), 0, -1) 56 # Otherwise, then following handles both narrow and wide 57 # Python builds (the first item in the array is BOM, so we skip it): 58elif sys.maxunicode == 0x10FFFF: 59 hb.buffer_add_utf32 (buf, array.array('I', text.encode('utf-32'))[1:], 0, -1) 60else: 61 hb.buffer_add_utf16 (buf, array.array('H', text.encode('utf-16'))[1:], 0, -1) 62 63 64hb.buffer_guess_segment_properties (buf) 65 66hb.shape (font, buf, []) 67del font 68 69infos = hb.buffer_get_glyph_infos (buf) 70positions = hb.buffer_get_glyph_positions (buf) 71 72for info,pos in zip(infos, positions): 73 gid = info.codepoint 74 cluster = info.cluster 75 x_advance = pos.x_advance 76 x_offset = pos.x_offset 77 y_offset = pos.y_offset 78 79 print("gid%d=%d@%d,%d+%d" % (gid, cluster, x_advance, x_offset, y_offset)) 80