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#!/usr/bin/env python
# -*- coding: utf-8 -*-
# -----------------------------------------------------------------------------
#
# pycairo/cairocffi-based glyph-mono/alpha example - Copyright 2017 Hin-Tak Leung
# Distributed under the terms of the new BSD license.
#
# rewrite of the numply,matplotlib-based example from Nicolas P. Rougier
# - Not immitating the upside-downness of glyph-monochrome/glyph-alpha
# This script default to normal(8-bit) rendering, but render to mono
# if any argument is specified.
#
# Mono rendering requires libtiff on small-endian platforms. See
# comments in bitmap_to_surface.py.
#
# -----------------------------------------------------------------------------
'''
Glyph bitmap monochrome/alpha rendring
'''
from freetype import *
# use Matrix() from Cairo instead of from Freetype
from cairo import Context, ImageSurface, FORMAT_ARGB32, SurfacePattern, FILTER_BEST, Matrix
from bitmap_to_surface import make_image_surface
if __name__ == '__main__':
from PIL import Image
import sys
face = Face('./Vera.ttf')
face.set_char_size( 48*64 )
if len(sys.argv) < 2:
# Normal(8-bit) Rendering
face.load_char('S', FT_LOAD_RENDER |
FT_LOAD_TARGET_NORMAL )
else:
# Mono(1-bit) Rendering
face.load_char('S', FT_LOAD_RENDER |
FT_LOAD_TARGET_MONO )
bitmap = face.glyph.bitmap
width = face.glyph.bitmap.width
rows = face.glyph.bitmap.rows
pitch = face.glyph.bitmap.pitch
glyph_surface = make_image_surface(face.glyph.bitmap)
surface = ImageSurface(FORMAT_ARGB32, 800, 600)
ctx = Context(surface)
ctx.rectangle(0,0,800,600)
ctx.set_line_width(0)
ctx.set_source_rgb (0.5 , 0.5, 0.5)
ctx.fill()
#
scale = 480.0 / rows
ctx.set_source_surface(glyph_surface, 0, 0)
pattern = ctx.get_source()
SurfacePattern.set_filter(pattern, FILTER_BEST)
scalematrix = Matrix()
scalematrix.scale(1.0/scale,1.0/scale)
scalematrix.translate(-(400.0 - width *scale /2.0 ), -60)
pattern.set_matrix(scalematrix)
ctx.set_source_rgb (0 , 0, 1)
ctx.mask(pattern)
ctx.fill()
surface.flush()
surface.write_to_png("glyph-mono+alpha-cairo.png")
Image.open("glyph-mono+alpha-cairo.png").show()
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