kc3-lang/harfbuzz/src/sample.py

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• Hash : 7c6937e7
  Author :
  Date : 2017-11-20T14:49:22
  

  Move all references of old url to the new address (#622)
  
  

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• src/sample.py

• #!/usr/bin/python
  # -*- coding: utf-8 -*-
  
  from __future__ import print_function
  import sys
  import array
  from gi.repository import HarfBuzz as hb
  from gi.repository import GLib
  
  # Python 2/3 compatibility
  try:
  	unicode
  except NameError:
  	unicode = str
  
  def tounicode(s, encoding='utf-8'):
  	if not isinstance(s, unicode):
  		return s.decode(encoding)
  	else:
  		return s
  
  fontdata = open (sys.argv[1], 'rb').read ()
  text = tounicode(sys.argv[2])
  # Need to create GLib.Bytes explicitly until this bug is fixed:
  # https://bugzilla.gnome.org/show_bug.cgi?id=729541
  blob = hb.glib_blob_create (GLib.Bytes.new (fontdata))
  face = hb.face_create (blob, 0)
  del blob
  font = hb.font_create (face)
  upem = hb.face_get_upem (face)
  del face
  hb.font_set_scale (font, upem, upem)
  #hb.ft_font_set_funcs (font)
  hb.ot_font_set_funcs (font)
  
  buf = hb.buffer_create ()
  class Debugger(object):
  	def message (self, buf, font, msg, data, _x_what_is_this):
  		print(msg)
  		return True
  debugger = Debugger()
  hb.buffer_set_message_func (buf, debugger.message, 1, 0)
  
  ##
  ## Add text to buffer
  ##
  #
  # See https://github.com/harfbuzz/harfbuzz/pull/271
  #
  if False:
  	# If you do not care about cluster values reflecting Python
  	# string indices, then this is quickest way to add text to
  	# buffer:
  	hb.buffer_add_utf8 (buf, text.encode('utf-8'), 0, -1)
  	# Otherwise, then following handles both narrow and wide
  	# Python builds:
  elif sys.maxunicode == 0x10FFFF:
  	hb.buffer_add_utf32 (buf, array.array('I', text.encode('utf-32')), 0, -1)
  else:
  	hb.buffer_add_utf16 (buf, array.array('H', text.encode('utf-16')), 0, -1)
  
  
  hb.buffer_guess_segment_properties (buf)
  
  hb.shape (font, buf, [])
  del font
  
  infos = hb.buffer_get_glyph_infos (buf)
  positions = hb.buffer_get_glyph_positions (buf)
  
  for info,pos in zip(infos, positions):
  	gid = info.codepoint
  	cluster = info.cluster
  	x_advance = pos.x_advance
  	x_offset = pos.x_offset
  	y_offset = pos.y_offset
  
  	print("gid%d=%d@%d,%d+%d" % (gid, cluster, x_advance, x_offset, y_offset))
  

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