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#!/usr/bin/env python
from pathlib import Path
import unicodedata
import re
import ast
from importlib.resources import files
from . import data
STROKE_FONT_SCALE = 1/21
FONT_OFFSET = -10
DEFAULT_SPACE_WIDTH = 0.6
DEFAULT_CHAR_GAP = 0.2
_dec = lambda c: ord(c)-ord('R')
class Newstroke:
def __init__(self, newstroke_cpp=None):
if newstroke_cpp is None:
newstroke_cpp = files(data).joinpath('newstroke_font.cpp').read_bytes()
self.glyphs = dict(self.load(newstroke_cpp))
def render(self, text, size=1.0, space_width=DEFAULT_SPACE_WIDTH, char_gap=DEFAULT_CHAR_GAP):
text = unicodedata.normalize('NFC', text)
missing_glyph = self.glyphs['?']
x = 0
for c in text:
if c == ' ':
x += space_width*size
continue
width, strokes = self.glyphs.get(c, missing_glyph)
glyph_w = max(width, max(x for st in strokes for x, _y in st))
for st in strokes:
yield self.transform_stroke(st, translate=(x, 0), scale=(size, size))
x += glyph_w*size
@classmethod
def transform_stroke(kls, stroke, translate, scale):
dx, dy = translate
sx, sy = scale
return [(x*sx+dx, y*sy+dy) for x, y in stroke]
def load(self, newstroke_cpp):
e = []
for char, (width, strokes) in self.load_glyphs(newstroke_cpp):
yield char, (width, strokes)
@classmethod
def decode_stroke(kls, stroke, start_x):
for i in range(0, len(stroke), 2):
x = (stroke[i]-0x52-start_x)*STROKE_FONT_SCALE
y = (stroke[i+1]-0x52+FONT_OFFSET)*STROKE_FONT_SCALE
yield (x, y)
@classmethod
def decode_glyph(kls, data):
start_x, end_x = data[0]-0x52, data[1]-0x52
width = end_x - start_x
strokes = tuple(tuple(kls.decode_stroke(st, start_x)) for st in data[2:].split(b' R'))
return width*STROKE_FONT_SCALE, strokes
@classmethod
def load_glyphs(kls, newstroke_cpp):
it = iter(newstroke_cpp.splitlines())
for line in it:
if re.search(rb'char.*\*', line):
break
charcode = 0x20
for line in it:
if (match := re.search(rb'".*"', line)):
yield chr(charcode), kls.decode_glyph(match.group(0)[1:-1].replace(b'\\\\', b'\\'))
charcode += 1
else:
if b'}' in line:
break
if __name__ == '__main__':
import time
t1 = time.time()
Newstroke()
t2 = time.time()
print((t2-t1)*1000)
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