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
59
60
61
62
63
64
65
66
67
68
69
70
71
|
/*
4coder_codepoint_map.cpp - Codepoint map to index
*/
// TOP
function b32
codepoint_index_map_read(Codepoint_Index_Map *map, u32 codepoint, u16 *index_out){
b32 success = true;
if (codepoint == 0 && map->has_zero_index){
*index_out = map->zero_index;
}
else if (table_read(&map->table, codepoint, index_out)){
// NOTE(allen): do nothing
}
else{
success = false;
}
return(success);
}
function u16
codepoint_index_map_count(Codepoint_Index_Map *map){
return(map->max_index + 1);
}
function f32
font_get_glyph_advance(Face_Advance_Map *map, Face_Metrics *metrics, u32 codepoint, f32 tab_multiplier){
f32 result = 0.f;
if (codepoint == '\t'){
result = metrics->space_advance*tab_multiplier;
}
else{
if (character_is_whitespace(codepoint)){
codepoint = ' ';
}
u16 index = 0;
if (codepoint_index_map_read(&map->codepoint_to_index, codepoint, &index)){
if (index < map->index_count){
result = map->advance[index];
}
}
}
return(result);
}
function f32
font_get_max_glyph_advance_range(Face_Advance_Map *map, Face_Metrics *metrics,
u32 codepoint_first, u32 codepoint_last,
f32 tab_multiplier){
f32 result = font_get_glyph_advance(map, metrics, codepoint_first, tab_multiplier);
for (u32 i = codepoint_first + 1; i <= codepoint_last; i += 1){
f32 a = font_get_glyph_advance(map, metrics, i, tab_multiplier);
result = Max(a, result);
}
return(result);
}
function f32
font_get_average_glyph_advance_range(Face_Advance_Map *map, Face_Metrics *metrics,
u32 codepoint_first, u32 codepoint_last,
f32 tab_multiplier){
f32 result = 0.f;
for (u32 i = codepoint_first; i <= codepoint_last; i += 1){
result += font_get_glyph_advance(map, metrics, i, tab_multiplier);
}
result /= (f32)(codepoint_last - codepoint_first + 1);
return(result);
}
// BOTTOM
|
