invert_font_size.py

# Author: Ankush Gupta
# Date: 2015
"Script to generate font-models."

import pygame
from pygame import freetype
from text_utils import FontState
import numpy as np 
import matplotlib.pyplot as plt 
import cPickle as cp


pygame.init()


# ys = np.arange(8,200)
ys = np.arange(100,200)
A = np.c_[ys,np.ones_like(ys)]

xs = []
models = {} #linear model

FS = FontState()
#plt.figure()
#plt.hold(True)
print(FS.fonts)

for i in xrange(len(FS.fonts)):
	print i
	# font = freetype.Font(FS.fonts[i], size=12)
	font = freetype.Font(FS.fonts[i], size=50)
	h = []
	for y in ys:
		h.append(font.get_sized_glyph_height(y))
	h = np.array(h)
	m,_,_,_ = np.linalg.lstsq(A,h)
	models[font.name] = m
	xs.append(h)

with open('font_px2pt.cp','w') as f:
	cp.dump(models,f)
#plt.plot(xs,ys[i])
#plt.show()