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simplepolator.py
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simplepolator.py
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#!/usr/bin/env python
# -*- coding: utf-8 -*-
# FontForge Simplepolator V0.1
#
# Copyright (c) 2012, Dave Crossland (dave@understandingfonts.com)
# Copyright (c) 2012, Michal Nowakowski (miszka@limes.com.pl)
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
# Redistributions of source code must retain the above copyright notice, this
# list of conditions and the following disclaimer.
#
# Redistributions in binary form must reproduce the above copyright notice,
# this list of conditions and the following disclaimer in the documentation
# and/or other materials provided with the distribution.
#
# The name of the author may not be used to endorse or promote products
# derived from this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
# WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
# MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
# EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
# PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
# OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
# WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
# OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
# ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
"""
A FontForge plug-in to generate interpolated instances from 2 characters.
Inspired by the Simplepolator FontLab/RoboFont script by Pablo Impallari
found at http://www.impallari.com/projects/overview/simplepolation
to easily apply the Gunnlaugur SE Briem's method
http://66.147.242.192/~operinan/2/2.3.3a/2.3.3.02.tests.htm
Copy to ~/.FontForge/python/ and then find "Simplepolator" in the Tools menu,
active when 2 characters are selected.
"""
import fontforge
def copyAndPaste(font, source, target):
font.selection.select(source)
font.copy()
font.selection.select(target)
font.paste()
def note(message):
fontforge.logWarning(str(message))
print(str(message))
def simplepolate(registerobject, font):
# Ask user how many children to create, default is 5
amount = 5
s = fontforge.askString("Simple Glyph Interpolation", "How many children?", str(amount))
try:
amount = int(s)
except:
fontforge.postError("Bad value", "Expected whole number")
# figure out the interpolation amount floats based on how many children the user requested
interpolationamount = [0.0]
calcamount = amount +1
x = 1.0 / calcamount
for y in range(1, calcamount):
interpolationamount.append(x*y)
interpolationamount.append(1.0)
# get the souce glyphs from the selection -- this should be simpler...
glyphs = []
for g in font.selection.byGlyphs:
glyphs.append(g)
source1 = glyphs[0]
source2 = glyphs[1]
# get a name for the children - font-name-generator.py supplies gibberish() so if we have that available, lets use it
try:
name = gibberish(1)
except Exception as e:
name = "simplepolation"
name = fontforge.askString("Simple Glyph Interpolation", "Children names?", str(name))
# create all the children
for x in range(amount+2):
glyphname = str(name) + '.'+ str(x+1)
g = font.createChar(-1, glyphname)
g.preserveLayerAsUndo(1)
# interpolate the top layer
g.layers[1] = source1.layers[1].interpolateNewLayer(source2.layers[1], interpolationamount[x])
# interpolate the width
g.width = source1.width + (source2.width - source1.width)*interpolationamount[x]
# interpolate the vwidth
g.vwidth = source1.vwidth + (source2.vwidth - source1.vwidth)*interpolationamount[x]
# let folks know what we did
message = "Simplepolator created '%s' that is %s%% '%s' and %s%% '%s'" % (glyphname, int(100-interpolationamount[x]*100), source1.glyphname, int(interpolationamount[x]*100), source2.glyphname)
note(message)
# Only enable Tool menu item if 2 characters are selected
def shouldWeAppear(registerobject, font):
font = fontforge.activeFont()
glyphs = []
for g in font.selection.byGlyphs:
glyphs.append(g)
if len(glyphs) == 2:
return True
else:
return False
# Register this PlugIn in the Tools menu
if fontforge.hasUserInterface():
# keyShortcut="Ctl+Shft+n"
keyShortcut = None
menuText = "Simplepolate"
fontforge.registerMenuItem(simplepolate,shouldWeAppear,None,"Font",keyShortcut,menuText);