def generate_page(fontfile, str="The quick brown fox jumped over the lazy dog", sizes=[72,60,48,44,36,32,30,28,24,22,21,20,18,16,14,12,11,10,9,8]):
font = pyfreetype.open_font(fontfile)
image = PIL.Image.new("L", (1024,1024))
pen_x = 0
pen_y = 0
for size in sizes:
font.set_char_size(size, size, 72, 72)
# move to the baseline
pen_x = 0
pen_y += int(font.size.height)
for ch in str:
bitmap = font.get_char_bitmap(ord(ch))
metrics = font.get_char_metrics(ord(ch))
ch_bitmap = PIL.Image.new("L", (bitmap.width, bitmap.height))
ch_bitmap.putdata(bitmap.pixels)
if pen_x + bitmap.left + bitmap.width > 1024:
pen_x = 0
pen_y += int(font.size.height)
image.paste(ch_bitmap, (pen_x+bitmap.left, pen_y-bitmap.top), ch_bitmap)
pen_x += int(metrics.advanceX)
pen_y += int(metrics.advanceY)
return image
def generate_comparison(fontfiles, str, size=28, width=1024):
image_width = width
image_height = 1024
image = PIL.Image.new("L", (image_width, image_height))
pen_x = 0
pen_y = 0
for file in fontfiles:
font = pyfreetype.open_font(file)
font.set_char_size(size, size, 72, 72)
# move to the baseline
pen_x = 0
pen_y += int(font.size.height)
for ch in "%s-%s: %s" % (font.family_name, font.style_name, str):
bitmap = font.get_char_bitmap(ord(ch))
metrics = font.get_char_metrics(ord(ch))
ch_bitmap = PIL.Image.new("L", (bitmap.width, bitmap.height))
ch_bitmap.putdata(bitmap.pixels)
if pen_x + bitmap.left + bitmap.width > image_width:
pen_x = 0
pen_y += int(font.size.height)
if pen_y-bitmap.top+bitmap.height >= image_height:
image_height *= 2
image_large = PIL.Image.new("L", (image_width, image_height))
image_large.paste(image, (0, 0))
image = image_large
image.paste(ch_bitmap, (pen_x+bitmap.left, pen_y-bitmap.top), ch_bitmap)
pen_x += int(metrics.advanceX)
pen_y += int(metrics.advanceY)
del font
return image.crop((0, 0, image_width, pen_y+64))
def build(fontfile, size, charset, max_texture_width=256, spacing=4):
font = pyfreetype.open_font(fontfile)
font.set_pixel_size(size, size)
bitmaps = {}
max_width = 0
max_height = 0
for ch in charset:
bitmap = font.get_char_bitmap(ord(unicode(ch)))
bitmaps[ch] = bitmap
max_width = max(max_width, bitmap.width)
max_height = max(max_height, bitmap.height)
# adjust for spacing
max_width += spacing * 2
max_height += spacing * 2
tex_width = min(max_width * len(charset), max_texture_width)
tex_height = int(len(charset) / math.floor(tex_width / float(max_width)) * max_height)
tex = PIL.Image.new("L", (tex_width, tex_height))
pen_x = 0
pen_y = 0
metrics_dict = {}
for ch in charset:
bitmap = font.get_char_bitmap(ord(unicode(ch)))
metrics = font.get_char_metrics(ord(unicode(ch)))
metrics_dict[ch] = {
'width': metrics.width,
'horiBearingX': metrics.horiBearingX,
'horiBearingY': metrics.horiBearingY,
'horiAdvance': metrics.horiAdvance,
'vertBearingX': metrics.vertBearingX,
'vertBearingY': metrics.vertBearingY,
'vertAdvance': metrics.vertAdvance,
'linearHoriAdvance': metrics.linearHoriAdvance,
'linearVertAdvance': metrics.linearVertAdvance,
'advanceX': metrics.advanceX,
'advanceY': metrics.advanceY,
'bitmapLeft': pen_x+spacing,
'bitmapTop': pen_y+spacing,
'bitmapWidth': bitmap.width,
'bitmapHeight': bitmap.height,
}
image = PIL.Image.new("L", (bitmap.width, bitmap.height))
image.putdata(bitmap.pixels)
tex.paste(image, (pen_x+spacing, pen_y+spacing))
del image
pen_x += max_width
if pen_x + max_width >= tex.size[0]:
pen_x = 0
pen_y += max_height
kerning_pairs = []
for left in charset:
for right in charset:
x, y = font.get_kerning(ord(unicode(left)), ord(unicode(right)))
if x != 0 or y != 0:
kerning_pairs.append({
'left': left,
'right': right,
'x': x,
'y': y,
})
metrics_dict['kerning_pairs'] = kerning_pairs
del font
return tex, json.dumps(metrics_dict, indent=1)
