1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
|
import moderngl_window
class FontMeta:
"""Metdata for texture array"""
def __init__(self, meta):
self._meta = meta
self.characters = self._meta['characters']
self.character_ranges = self._meta['character_ranges']
self.character_height = self._meta['character_height']
self.character_width = self._meta['character_width']
self.atlas_height = self._meta['atlas_height']
self.atlas_width = self._meta['atlas_width']
@property
def char_aspect_wh(self):
return self.character_width / self.character_height
def char_aspect_hw(self):
return self.character_height / self.character_width
class BaseText:
"""Simple base class for a bitmapped text rendered"""
def __init__(self):
self._meta = None
self._ct = None
self.ctx = moderngl_window.ContextRefs.CONTEXT
def draw(self, *args, **kwargs):
raise NotImplementedError()
def _translate_string(self, data):
"""Translate string into character texture positions"""
data = data.encode('iso-8859-1', errors='replace')
for index, char in enumerate(data):
yield self._meta.characters - 1 - self._ct[char]
def _init(self, meta: FontMeta):
self._meta = meta
# Check if the atlas size is sane
if not self._meta.characters * self._meta.character_height == self._meta.atlas_height:
raise ValueError("characters * character_width != atlas_height")
self._generate_character_map()
def _generate_character_map(self):
"""Generate character translation map (latin1 pos to texture pos)"""
self._ct = [-1] * 256
index = 0
for c_range in self._meta.character_ranges:
for c_pos in range(c_range['min'], c_range['max'] + 1):
self._ct[c_pos] = index
index += 1
|
