1#!/usr/bin/env python3 2 3import sys 4import array 5import gi 6gi.require_version('HarfBuzz', '0.0') 7from gi.repository import HarfBuzz as hb 8from gi.repository import GLib 9 10fontdata = open (sys.argv[1], 'rb').read () 11text = sys.argv[2] 12# Need to create GLib.Bytes explicitly until this bug is fixed: 13# https://bugzilla.gnome.org/show_bug.cgi?id=729541 14blob = hb.glib_blob_create (GLib.Bytes.new (fontdata)) 15face = hb.face_create (blob, 0) 16del blob 17font = hb.font_create (face) 18upem = hb.face_get_upem (face) 19del face 20hb.font_set_scale (font, upem, upem) 21#hb.ft_font_set_funcs (font) 22hb.ot_font_set_funcs (font) 23 24buf = hb.buffer_create () 25class Debugger (object): 26 def message (self, buf, font, msg, data, _x_what_is_this): 27 print (msg) 28 return True 29debugger = Debugger () 30hb.buffer_set_message_func (buf, debugger.message, 1, 0) 31 32## 33## Add text to buffer 34## 35# 36# See https://github.com/harfbuzz/harfbuzz/pull/271 37# 38# If you do not care about cluster values reflecting Python 39# string indices, then this is quickest way to add text to 40# buffer: 41# hb.buffer_add_utf8 (buf, text.encode('utf-8'), 0, -1) 42# Otherwise, then following handles both narrow and wide 43# Python builds (the first item in the array is BOM, so we skip it): 44if sys.maxunicode == 0x10FFFF: 45 hb.buffer_add_utf32 (buf, array.array ('I', text.encode ('utf-32'))[1:], 0, -1) 46else: 47 hb.buffer_add_utf16 (buf, array.array ('H', text.encode ('utf-16'))[1:], 0, -1) 48 49 50hb.buffer_guess_segment_properties (buf) 51 52hb.shape (font, buf, []) 53del font 54 55infos = hb.buffer_get_glyph_infos (buf) 56positions = hb.buffer_get_glyph_positions (buf) 57 58for info, pos in zip (infos, positions): 59 gid = info.codepoint 60 cluster = info.cluster 61 x_advance = pos.x_advance 62 x_offset = pos.x_offset 63 y_offset = pos.y_offset 64 65 print ("gid%d=%d@%d,%d+%d" % (gid, cluster, x_advance, x_offset, y_offset)) 66