66 lines
1.8 KiB
Python
Executable File
66 lines
1.8 KiB
Python
Executable File
#!/usr/bin/env python3
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import sys
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import array
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import gi
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gi.require_version('HarfBuzz', '0.0')
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from gi.repository import HarfBuzz as hb
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from gi.repository import GLib
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fontdata = open (sys.argv[1], 'rb').read ()
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text = sys.argv[2]
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# Need to create GLib.Bytes explicitly until this bug is fixed:
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# https://bugzilla.gnome.org/show_bug.cgi?id=729541
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blob = hb.glib_blob_create (GLib.Bytes.new (fontdata))
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face = hb.face_create (blob, 0)
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del blob
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font = hb.font_create (face)
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upem = hb.face_get_upem (face)
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del face
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hb.font_set_scale (font, upem, upem)
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#hb.ft_font_set_funcs (font)
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hb.ot_font_set_funcs (font)
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buf = hb.buffer_create ()
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class Debugger (object):
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def message (self, buf, font, msg, data, _x_what_is_this):
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print (msg)
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return True
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debugger = Debugger ()
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hb.buffer_set_message_func (buf, debugger.message, 1, 0)
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##
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## Add text to buffer
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##
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#
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# See https://github.com/harfbuzz/harfbuzz/pull/271
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#
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# If you do not care about cluster values reflecting Python
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# string indices, then this is quickest way to add text to
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# buffer:
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# hb.buffer_add_utf8 (buf, text.encode('utf-8'), 0, -1)
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# Otherwise, then following handles both narrow and wide
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# Python builds (the first item in the array is BOM, so we skip it):
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if sys.maxunicode == 0x10FFFF:
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hb.buffer_add_utf32 (buf, array.array ('I', text.encode ('utf-32'))[1:], 0, -1)
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else:
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hb.buffer_add_utf16 (buf, array.array ('H', text.encode ('utf-16'))[1:], 0, -1)
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hb.buffer_guess_segment_properties (buf)
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hb.shape (font, buf, [])
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del font
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infos = hb.buffer_get_glyph_infos (buf)
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positions = hb.buffer_get_glyph_positions (buf)
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for info, pos in zip (infos, positions):
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gid = info.codepoint
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cluster = info.cluster
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x_advance = pos.x_advance
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x_offset = pos.x_offset
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y_offset = pos.y_offset
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print ("gid%d=%d@%d,%d+%d" % (gid, cluster, x_advance, x_offset, y_offset))
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