Mercurial > hgrepos > Python2 > PyMuPDF

annotate mupdf-source/thirdparty/harfbuzz/src/sample.py @ 21:2f43e400f144

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Provide an "all" target to build both the sdist and the wheel
author Franz Glasner <fzglas.hg@dom66.de>
date Fri, 19 Sep 2025 10:28:53 +0200
parents b50eed0cc0ef
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 #!/usr/bin/env python3
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2
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3 import sys
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4 import array
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5 import gi
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6 gi.require_version('HarfBuzz', '0.0')
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7 from gi.repository import HarfBuzz as hb
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8 from gi.repository import GLib
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9
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10 fontdata = open (sys.argv[1], 'rb').read ()
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11 text = sys.argv[2]
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12 # Need to create GLib.Bytes explicitly until this bug is fixed:
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13 # https://bugzilla.gnome.org/show_bug.cgi?id=729541
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14 blob = hb.glib_blob_create (GLib.Bytes.new (fontdata))
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15 face = hb.face_create (blob, 0)
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16 del blob
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17 font = hb.font_create (face)
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18 upem = hb.face_get_upem (face)
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19 del face
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20 hb.font_set_scale (font, upem, upem)
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21 #hb.ft_font_set_funcs (font)
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22 hb.ot_font_set_funcs (font)
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23
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24 buf = hb.buffer_create ()
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25 class Debugger (object):
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26 def message (self, buf, font, msg, data, _x_what_is_this):
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27 print (msg)
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28 return True
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29 debugger = Debugger ()
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30 hb.buffer_set_message_func (buf, debugger.message, 1, 0)
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32 ##
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33 ## Add text to buffer
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34 ##
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35 #
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36 # See https://github.com/harfbuzz/harfbuzz/pull/271
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37 #
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38 # If you do not care about cluster values reflecting Python
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39 # string indices, then this is quickest way to add text to
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40 # buffer:
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41 # hb.buffer_add_utf8 (buf, text.encode('utf-8'), 0, -1)
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42 # Otherwise, then following handles both narrow and wide
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43 # Python builds (the first item in the array is BOM, so we skip it):
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44 if sys.maxunicode == 0x10FFFF:
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45 hb.buffer_add_utf32 (buf, array.array ('I', text.encode ('utf-32'))[1:], 0, -1)
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46 else:
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47 hb.buffer_add_utf16 (buf, array.array ('H', text.encode ('utf-16'))[1:], 0, -1)
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50 hb.buffer_guess_segment_properties (buf)
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52 hb.shape (font, buf, [])
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53 del font
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55 infos = hb.buffer_get_glyph_infos (buf)
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56 positions = hb.buffer_get_glyph_positions (buf)
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57
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58 for info, pos in zip (infos, positions):
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59 gid = info.codepoint
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60 cluster = info.cluster
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61 x_advance = pos.x_advance
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62 x_offset = pos.x_offset
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63 y_offset = pos.y_offset
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64
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65 print ("gid%d=%d@%d,%d+%d" % (gid, cluster, x_advance, x_offset, y_offset))