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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.
#
# - The code is incomplete and over-simplified, as it ignores the 3rd order
# bezier curve bit and always intepolate between off-curve points.
# This is only correct for truetype fonts (which only use 2nd order bezier curves).
# - Also it seems to assume the first point is always on curve; this is
# unusual but legal.
#
# -----------------------------------------------------------------------------
'''
Show how to access glyph outline description.
'''
from freetype import *
if __name__ == '__main__':
import numpy
import matplotlib.pyplot as plt
from matplotlib.path import Path
import matplotlib.patches as patches
face = Face('./Vera.ttf')
face.set_char_size( 32*64 )
face.load_char('g')
slot = face.glyph
bitmap = face.glyph.bitmap
width = face.glyph.bitmap.width
rows = face.glyph.bitmap.rows
pitch = face.glyph.bitmap.pitch
data = []
for i in range(rows):
data.extend(bitmap.buffer[i*pitch:i*pitch+width])
Z = numpy.array(data,dtype=numpy.ubyte).reshape(rows, width)
outline = slot.outline
points = numpy.array(outline.points, dtype=[('x',float), ('y',float)])
x, y = points['x'], points['y']
figure = plt.figure(figsize=(8,10))
axis = figure.add_subplot(111)
#axis.scatter(points['x'], points['y'], alpha=.25)
start, end = 0, 0
VERTS, CODES = [], []
# Iterate over each contour
for i in range(len(outline.contours)):
end = outline.contours[i]
points = outline.points[start:end+1]
points.append(points[0])
tags = outline.tags[start:end+1]
tags.append(tags[0])
segments = [ [points[0],], ]
for j in range(1, len(points) ):
segments[-1].append(points[j])
if tags[j] & (1 << 0) and j < (len(points)-1):
segments.append( [points[j],] )
verts = [points[0], ]
codes = [Path.MOVETO,]
for segment in segments:
if len(segment) == 2:
verts.extend(segment[1:])
codes.extend([Path.LINETO])
elif len(segment) == 3:
verts.extend(segment[1:])
codes.extend([Path.CURVE3, Path.CURVE3])
else:
verts.append(segment[1])
codes.append(Path.CURVE3)
for i in range(1,len(segment)-2):
A,B = segment[i], segment[i+1]
C = ((A[0]+B[0])/2.0, (A[1]+B[1])/2.0)
verts.extend([ C, B ])
codes.extend([ Path.CURVE3, Path.CURVE3])
verts.append(segment[-1])
codes.append(Path.CURVE3)
VERTS.extend(verts)
CODES.extend(codes)
start = end+1
# Draw glyph
path = Path(VERTS, CODES)
glyph = patches.PathPatch(path, fill = True, facecolor=(0.8,0.5,0.8), alpha=.25, lw=0)
glyph_outline = patches.PathPatch(path, fill = False, edgecolor='black', lw=3)
plt.imshow(Z, extent=[x.min(), x.max(),y.min(), y.max()], origin='lower',
interpolation='nearest', cmap = plt.cm.gray_r, vmin=0, vmax=400)
plt.xticks(numpy.linspace(x.min(), x.max(), Z.shape[1]+1), ())
plt.yticks(numpy.linspace(y.min(), y.max(), Z.shape[0]+1), ())
plt.grid(color='k', linewidth=1, linestyle='-')
axis.add_patch(glyph)
axis.add_patch(glyph_outline)
axis.set_xlim(x.min(), x.max())
axis.set_ylim(y.min(), y.max())
plt.savefig('glyph-vector-2.svg')
plt.show()
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