def apply(self, info, glyph, startx, starty, size, maxsize, glyphimage, previmage):
factor = self.factor
face = info.face
flags = ft.LOAD_RENDER | ft.LOAD_TARGET_MONO
face.set_char_size( width=0, height=(info.size*factor)*64, hres=info.dpi, vres=info.dpi )
face.load_char( glyph.unicode, flags )
bitmap = fu.make_array_from_bitmap(face.glyph.contents.bitmap) * 255
metrics = face.glyph.contents.metrics
bearingY = (metrics.horiBearingY >> 6) + info.internalpadding[1]*factor + info.extrapadding[1]*factor
# Due to the down scaling, we need to make sure that the bitmap start at the correct pixels
offset_y = bearingY - glyph.bearingY * factor
bitmap = fu.pad_bitmap(bitmap, info.extrapadding[0]*factor, info.extrapadding[1]*factor - offset_y, info.extrapadding[2]*factor, info.extrapadding[3]*factor + offset_y, 0, debug=glyph.unicode=='r')
# TODO: Work out how to eliminate this issue
e = np.empty( bitmap.shape, bitmap.dtype, order='F' )
e[:, :] = bitmap
bitmap = e
i = utils.calculate_sedt(bitmap, self.size)
#i = bitmap
while factor > 1:
i = utils.half_size(i)
factor /= 2
i = i.astype(np.float64) / 255.0
a = np.zeros_like(i)
a[i > 0] = 1.0
return np.dstack( (i, i, i, a) )
def render(options, info, face):
found = False
for charmap in face.charmaps:
found = found or charmap.encoding == ft.ENCODING_UNICODE
if not found:
logging.warning("The font %s doesn't seem to support unicode!? Continuing anyway")
if options.writetext:
info.letters = [c for c in info.letters if unichr(c) in options.writetext]
logging.debug("Rendering %d characters" % len(info.letters))
# find out the needed extra padding on each side of each glyph
info.extrapadding = _get_extra_padding(info)
info.face = face
flags = ft.LOAD_RENDER
antialias = getattr(info, 'antialias', 'normal')
if antialias == 'none':
flags |= ft.LOAD_TARGET_MONO
elif antialias == 'light':
flags |= ft.LOAD_TARGET_LIGHT
elif antialias == 'normal':
flags |= ft.LOAD_TARGET_NORMAL
logging.debug("RENDERING %s", unicode([g.unicode for g in info.glyphs]))
assert len(info.glyphs) > 0, "No glyphs to process!"
# since the layers might set this, we set it back
face.set_char_size( width=0, height=info.size * 64, hres=info.dpi, vres=info.dpi )
for glyph in info.glyphs:
face.load_char( glyph.unicode, flags )
if face.glyph.contents.bitmap.rows:
glyph.bitmap = fu.make_array_from_bitmap(face.glyph.contents.bitmap)
shape = glyph.bitmap.shape
glyph.bitmap = fu.pad_bitmap(glyph.bitmap, info.extrapadding[0], info.extrapadding[1], info.extrapadding[2], info.extrapadding[3], 0.0)
if info.useadvanceaswidth:
# Pad the bitmap with the bearing width on each side
# This is useful for file formats that doesn't carry all the glyph info into it
padleft = glyph.bearingX
padright = glyph.advance - shape[0] - padleft
glyph.bitmap = fu.pad_bitmap(glyph.bitmap, 0, 0, padright, 0, 0.0)
if antialias != 'none':
glyph.bitmap /= 255.0
else:
logging.debug("char missing bitmap %X '%s'" % (glyph.utf8, glyph.unicode) )
# Apply all layers on all the tiny bitmaps
_apply_layers(info)
max_bearing_y = 0 # the maximum extent above the baseline
min_bearing_y = 0 # the maximum extent below the baseline
max_width = 0
# calculate the height/width, since the layers may increased/decreased the size
max_width = 0
max_height = 0
for glyph in info.glyphs:
if glyph.bitmap is None:
continue
# find the highest char
max_bearing_y = max(max_bearing_y, glyph.bearingY)
# find the lowest char
min_bearing_y = min(min_bearing_y, glyph.bearingY - glyph.bitmap.shape[1])
max_width = max(max_width, glyph.bitmap.shape[0])
max_height = max(max_height, glyph.bitmap.shape[1])
info.max_height = max(max_height, info.ascender - info.descender)
info.max_width = max_width
