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#!/usr/bin/env python
# -*- coding: utf-8 -*-
# -----------------------------------------------------------------------------
#
# FreeType high-level python API - Copyright 2011-2015 Nicolas P. Rougier
# Distributed under the terms of the new BSD license.
#
# -----------------------------------------------------------------------------
from freetype import *
if __name__ == '__main__':
import numpy
import matplotlib.pyplot as plt
face = Face('./Vera.ttf')
text = 'Hello World !'
fontsize = 48
face.set_char_size( fontsize*64 )
slot = face.glyph
# First pass to compute bbox
width = 0
top = -fontsize #The distance from baseline to the top row of the bbox
bot = fontsize #The distance from baseline to the bottom row of the bbox (may be negative)
previous = 0
for i,c in enumerate(text):
face.load_char(c)
bitmap = slot.bitmap
top = max(top, slot.bitmap_top)
bot = min(bot, slot.bitmap_top - bitmap.rows)
kerning = face.get_kerning(previous, c)
width += (slot.advance.x >> 6) + (kerning.x >> 6)
previous = c
height = top - bot
Z = numpy.zeros((height,width), dtype=numpy.ubyte)
# Second pass for actual rendering
x, y = 0, 0
previous = 0
for c in text:
face.load_char(c)
bitmap = slot.bitmap
w,h = bitmap.width, bitmap.rows
y = top - slot.bitmap_top
kerning = face.get_kerning(previous, c)
x += (kerning.x >> 6)
Z[y:y+h,x+left:x+left+w] += numpy.array(bitmap.buffer, dtype='ubyte').reshape(h,w)
x += (slot.advance.x >> 6)
previous = c
plt.figure(figsize=(10, 10*Z.shape[0]/float(Z.shape[1])))
plt.imshow(Z, interpolation='nearest', origin='upper', cmap=plt.cm.gray)
plt.xticks([]), plt.yticks([])
plt.show()
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