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
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
|
use rusttype::{Font, Point, Rect, Scale};
use std::fs::{self, File};
use std::io::{self, Write};
// TODO: Build a Rust Macro that does what this does but without a build.rs
#[derive(Clone)]
struct FontMetadata {
pub charset: &'static str,
pub name: &'static str,
pub scale: Scale,
pub font: Font<'static>,
}
impl FontMetadata {
pub fn render_character(&self, scale: Scale, character: char) -> Vec<u8> {
let glyph = self.font.glyph(character).scaled(scale);
let positioned_glyph = glyph.clone().positioned(Point { x: 0.0, y: 0.0 });
let pixel_bounding_box = {
let bounding_box = positioned_glyph.pixel_bounding_box();
if bounding_box.is_none() {
Rect {
min: Point { x: 0, y: 0 },
max: Point {
x: glyph.h_metrics().advance_width as i32,
y: 0,
},
}
} else {
bounding_box.unwrap()
}
};
let width = pixel_bounding_box.width() as u32;
let height = pixel_bounding_box.height() as u32;
let mut image: Vec<u8> = Vec::new();
fn define_item(a: &mut Vec<u8>, i: usize, v: u8) {
if a.len() <= i {
while a.len() < i {
a.push(0x00);
}
a.push(v)
} else {
a[i] = v;
}
}
define_item(
&mut image,
14 + ((width as usize) * (height as usize)),
0x00,
);
image[0] = (width & 0b0000_0000_1111_1111) as u8;
image[1] = (width & (0b1111_1111_0000_0000 << 8)) as u8;
if (image[0] as u16) | (image[1] as u16 >> 8) != width as u16 {
panic!("Width missmatch!");
}
// TODO: do we *really* need i32 values here? wouldn't i16 be sufficient?
image[2..6].copy_from_slice(&pixel_bounding_box.min.x.to_le_bytes());
image[6..10]
.copy_from_slice(&(pixel_bounding_box.min.y + (scale.y / 2.0) as i32).to_le_bytes());
image[10..14].copy_from_slice(&(glyph.h_metrics().advance_width).to_le_bytes());
positioned_glyph.draw(|gx: u32, gy: u32, v| {
let bit = (v * 255.0) as u8;
if gx < width {
define_item(&mut image, (14 + (gy * width) + gx) as usize, bit);
}
});
image
}
pub fn img_to_hex(image: Vec<u8>) -> Vec<u8> {
let mut image2: Vec<u8> = Vec::new();
let width = (image[0] as u16) | (image[1] as u16 >> 8);
let mut i: i32 = -3;
for bit in image {
i += 1;
if i >= 0 {
if i as u16 == width {
i = 0;
image2.push(b'\n');
}
let v = format!("{:x?}", bit);
let v = if v.len() == 1 { format!("0{}", v) } else { v };
for char in v.chars() {
image2.push(char as u8);
}
// image2.push(if bit < 80 {' ' as u8} else if bit < 150 {'-' as u8} else {'#' as u8})
}
}
image2
}
fn unique_chars(&self) -> Vec<char> {
let mut v: Vec<char> = Vec::new();
for char in self.charset.chars() {
if !v.contains(&char) {
v.push(char);
}
}
v
}
}
fn exec(font: FontMetadata) -> io::Result<()> {
for c in font.unique_chars() {
let image = font.render_character(font.scale, c);
save_bits_to_file(&font, c as u8, &image)?;
}
Ok(())
}
fn save_bits_to_file(font: &FontMetadata, char: u8, bits: &[u8]) -> io::Result<()> {
fs::create_dir_all(format!("assets/computed-fonts/{}/", font.name))?;
let filename = format!("assets/computed-fonts/{}/{}.charbmp", font.name, char);
let mut file = File::create(&filename)?;
file.write_all(bits)?;
let filename = format!("assets/computed-fonts/{}/{}.txt", font.name, char);
let mut file = File::create(&filename)?;
file.write_all(&FontMetadata::img_to_hex(bits.to_vec()))?;
Ok(())
}
fn to_upper_snake_with_first_upper_preceeded_by_underscore(str: String) -> String {
let mut str = str;
for char in "ABCDEFGHIJKLMNOPQRSTUVWXYZ".chars() {
str = str.replace(char, format!("_{char}").as_str());
}
str.to_uppercase()
}
fn generate_struct(font: &FontMetadata) -> io::Result<String> {
let name = font.name;
let mut contents = format!(
"pub struct {name}Struct {{}}
impl BakedFont for {name}Struct {{
fn font_scale_y() -> f32 {{
{}
}}
fn has_char(&self, c: char) -> bool {{
match c as u8 {{",
format!(
"{}{}",
font.scale.y.to_string(),
if font.scale.y % 1.0 == 0.0 { ".0" } else { "" }
)
);
for char in font.unique_chars() {
contents = format!(
"{contents}
| {}",
char as u8,
);
}
contents = format!(
"{contents}
=> true,
_ => false
}}
}}
fn get_char_bytes(&self, c: char) -> &'static [u8] {{
match c as u8 {{
"
);
for char in font.unique_chars() {
contents = format!(
"{contents} {} => include_bytes!(\"../../assets/computed-fonts/{}/{}.charbmp\"),
",
char as u8, font.name, char as u8
);
}
contents = format!(
"{contents} _ => panic!(\"Glyph {{}} not included in precomputed fonts\", c)
}}
}}
}}
pub const FONT{}: {name}Struct = {name}Struct{{
}};
",
to_upper_snake_with_first_upper_preceeded_by_underscore(name.to_string())
);
Ok(contents)
}
fn main() -> Result<(), Box<dyn std::error::Error>> {
fs::create_dir_all("src/generated")?;
let mut modrs = "// Copyright is a sham this is a @generated file.
use crate::font::BakedFont;
"
.to_string();
let fonts = [
FontMetadata {
name: "Galmuri",
font: { Font::try_from_vec(fs::read("assets/fonts/Galmuri11.ttf")?).unwrap() },
charset: "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz29053: %,",
scale: Scale::uniform(20.0),
},
FontMetadata {
name: "CherryBombOne",
font: { Font::try_from_vec(fs::read("assets/fonts/CherryBombOne.ttf")?).unwrap() },
charset: "UwU-Space",
scale: Scale::uniform(36.0),
},
];
for font in fonts {
modrs = format!(
"{modrs}{}
",
generate_struct(&font)?
);
exec(font)?;
}
File::create("src/generated/fonts.rs")?.write_all(modrs.as_bytes())?;
Ok(())
}
|
