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Tidy up hbtestfont and add README

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Martin Hosken 2010-05-22 20:19:00 +01:00
parent 70ae332fe6
commit e5bed0a37f
2 changed files with 77 additions and 67 deletions
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10
contrib/python/README Normal file
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This contains a wrapping of harfbuzz into python. The module is dependent on pyrex. To build, type:
python setup.py build
In addition there is a test application, hbtestfont. It has GTK based gui output and for this, python modules for gtk, gobject and cairo are needed. The application may be run without gui output using the --nogui option.
Applications may be executed in the build context, without needing to install any modules or libraries, using the runpy script from the contrib/python directory. Thus one might type:
./runpy script/hbtestfont -f "Charis SIL" 0048 0069 0303

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contrib/python/scripts/hbtestfont
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import harfbuzz, optparse
from fontconfig import fcPattern
usage = '''usage: %prog [options] codepoints
Generates output of glyphs and positions. Each entry is of the form:
glyphid>cluster@(offsetx,offsety)+(advancex,advancey)
codepoints is a space separated list of hex values of Unicode codepoints'''
p = optparse.OptionParser(usage=usage)
p.add_option('-s', '--size', default=32, type="int", help="point size")
p.add_option('-l', '--lang', help="language code")
p.add_option('-c', '--script', help="script code")
p.add_option('-F', '--feature', action='append', help="define a feature key=val")
p.add_option('-f', '--font', help='Font to use to render glyphs. My be a font file', default="verdana")
p.add_option('-b', '--bold', help='Choose bold fonts', action='store_true')
p.add_option('-i', '--italic', help='Choose italic fonts', action='store_true')
p.add_option('-d', '--debug', action='store_true', help="Output trace info")
p.add_option('--nogui', action='store_true', help="Don't display a gui")
(opts, args) = p.parse_args()
fpat = opts.font + ":weight="
fpat += "bold" if opts.bold else "medium"
fpat += ":slant="
fpat += "italic" if opts.italic else "roman"
pat = fcPattern(fpat)
fname = pat.getString("file", 0)
family = pat.getString("family", 0)
print "Processing: " + fname
ft = harfbuzz.ft(fname, opts.size)
text = "".join(unichr(int(c, 16)) for c in args)
bytes = text.encode('utf_8')
buffer = harfbuzz.buffer(bytes, len(text))
if (opts.lang or opts.script) : buffer.set_scriptlang(opts.script if opts.script else "", opts.lang if opts.lang else "")
features = {}
if opts.feature :
for f in opts.feature :
k, v = f.split("=")
features[k] = v
ft.shape(buffer, features = features)
res = buffer.get_info(64) # scale for 26.6
print res
if not opts.nogui :
try:
import gtk
import gobject
@ -44,62 +85,21 @@ class GlyphsWindow (gtk.Widget) :
def do_expose_event(self, event) :
cr = self.window.cairo_create()
cr.set_matrix(cairo.Matrix(1, 0, 0, 1, 0, 2 * self.size))
cr.set_matrix(cairo.Matrix(1, 0, 0, 1, 0, 1.5 * self.size))
cr.set_font_face(cairo.ToyFontFace(self.fontname, cairo.FONT_SLANT_ITALIC if self.italic else cairo.FONT_SLANT_NORMAL, cairo.FONT_WEIGHT_BOLD if self.bold else cairo.FONT_WEIGHT_NORMAL))
cr.set_font_size(self.size)
cr.show_glyphs(self.glyphs) # [(gid, originx, originy)]
buffer = None
def tracefn(ft, aType, index) :
print aType + "(" + str(index) + "): " + str(buffer.get_info())
usage = '''usage: %prog [options] codepoints
Generates output of glyphs and positions. Each entry is of the form:
glyphid>cluster@(offsetx,offsety)+(advancex,advancey)
codepoints is a space separated list of hex values of Unicode codepoints'''
p = optparse.OptionParser(usage=usage)
p.add_option('-s', '--size', default=32, type="int", help="point size")
p.add_option('-l', '--lang', help="language code")
p.add_option('-c', '--script', help="script code")
p.add_option('-F', '--feature', action='append', help="define a feature key=val")
p.add_option('-f', '--font', help='Font to use to render glyphs. My be a font file', default="verdana")
p.add_option('-b', '--bold', help='Choose bold fonts', action='store_true')
p.add_option('-i', '--italic', help='Choose italic fonts', action='store_true')
p.add_option('-d', '--debug', action='store_true', help="Output trace info")
(opts, args) = p.parse_args()
fpat = opts.font + ":weight="
fpat += "bold" if opts.bold else "medium"
fpat += "italic" if opts.italic else "roman"
pat = fcPattern(fpat)
fname = pat.getString("file", 0)
family = pat.getString("family", 0)
print "Processing: " + fname
ft = harfbuzz.ft(fname, opts.size)
text = "".join(unichr(int(c, 16)) for c in args)
bytes = text.encode('utf_8')
buffer = harfbuzz.buffer(bytes, len(text))
if (opts.lang or opts.script) : buffer.set_scriptlang(opts.script if opts.script else "", opts.lang if opts.lang else "")
features = {}
if opts.feature :
for f in opts.feature :
k, v = f.split("=")
features[k] = v
ft.shape(buffer, features = features)
res = buffer.get_info(64) # scale for 26.6
print res
glyphs = []
org = [0, 0]
for g in res :
glyphs.append((g.gid, org[0] + g.offset[0], org[1] + g.offset[1]))
org[0] += g.advance[0]
org[1] += g.advance[1]
gobject.type_register(GlyphsWindow)
win = gtk.Window()
win.resize(org[0] + 10, 3 * opts.size + 40)
win.resize(org[0] + 10, 2 * opts.size + 40)
win.connect('delete-event', gtk.main_quit)
frame = gtk.Frame("glyphs")
win.add(frame)