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
use addon::FontAddon;
use allegro::{Bitmap, BitmapLike, Color, Core};
use allegro_font_sys::*;
use allegro_sys::*;
use libc::*;
use std::ffi::CString;
use std::mem;
#[derive(Copy, Clone)]
pub enum FontAlign
{
Left,
Centre,
Right,
}
impl FontAlign
{
fn get_allegro_flags(&self) -> c_int
{
match *self
{
FontAlign::Left => ALLEGRO_ALIGN_LEFT,
FontAlign::Right => ALLEGRO_ALIGN_RIGHT,
FontAlign::Centre => ALLEGRO_ALIGN_CENTRE,
}
}
}
pub trait FontDrawing
{
fn draw_text(&self, font: &Font, color: Color, x: f32, y: f32, align: FontAlign, text: &str);
fn draw_justified_text(&self, font: &Font, color: Color, x1: f32, x2: f32, y: f32, diff: f32, align: FontAlign, text: &str);
}
fn check_valid_target_bitmap()
{
unsafe {
if al_get_target_bitmap().is_null()
{
panic!("Target bitmap is null!");
}
}
}
impl FontDrawing for Core
{
fn draw_justified_text(&self, font: &Font, color: Color, x1: f32, x2: f32, y: f32, diff: f32, align: FontAlign, text: &str)
{
check_valid_target_bitmap();
if text.len() == 0
{
return;
}
unsafe {
let mut info: ALLEGRO_USTR_INFO = mem::uninitialized();
let ustr = al_ref_buffer(&mut info, text.as_ptr() as *const i8, text.len() as size_t);
al_draw_justified_ustr(
mem::transmute(font.get_font()),
color.get_allegro_color(),
x1 as c_float,
x2 as c_float,
y as c_float,
diff as c_float,
align.get_allegro_flags(),
ustr,
);
}
}
fn draw_text(&self, font: &Font, color: Color, x: f32, y: f32, align: FontAlign, text: &str)
{
check_valid_target_bitmap();
if text.len() == 0
{
return;
}
unsafe {
let mut info: ALLEGRO_USTR_INFO = mem::uninitialized();
let ustr = al_ref_buffer(&mut info, text.as_ptr() as *const i8, text.len() as size_t);
al_draw_ustr(
mem::transmute(font.get_font()),
color.get_allegro_color(),
x as c_float,
y as c_float,
align.get_allegro_flags(),
ustr,
);
}
}
}
pub struct Font
{
allegro_font: *mut ALLEGRO_FONT,
}
unsafe impl Send for Font {}
unsafe impl Sync for Font {}
impl Font
{
pub fn new_builtin(_: &FontAddon) -> Result<Font, ()>
{
unsafe { Font::wrap_allegro_font(al_create_builtin_font()) }
}
pub fn load_bitmap_font(_: &FontAddon, filename: &str) -> Result<Font, ()>
{
unsafe {
let filename = CString::new(filename.as_bytes()).unwrap();
let font = al_load_bitmap_font(filename.as_ptr());
Font::wrap_allegro_font(font)
}
}
pub fn grab_from_bitmap(_: &FontAddon, bmp: &Bitmap, ranges: &[(c_int, c_int)]) -> Result<Font, ()>
{
unsafe {
let font = al_grab_font_from_bitmap(bmp.get_allegro_bitmap(), ranges.len() as c_int, ranges.as_ptr() as *const c_int);
Font::wrap_allegro_font(font)
}
}
pub unsafe fn wrap_allegro_font(font: *mut ALLEGRO_FONT) -> Result<Font, ()>
{
if font.is_null()
{
Err(())
}
else
{
Ok(Font { allegro_font: font })
}
}
pub fn get_font(&self) -> *mut ALLEGRO_FONT
{
self.allegro_font
}
pub fn get_text_width(&self, text: &str) -> i32
{
unsafe {
let mut info: ALLEGRO_USTR_INFO = mem::uninitialized();
let ustr = al_ref_buffer(&mut info, text.as_ptr() as *const i8, text.len() as size_t);
al_get_ustr_width(self.get_font() as *const _, ustr) as i32
}
}
pub fn get_line_height(&self) -> i32
{
unsafe { al_get_font_line_height(self.get_font() as *const _) as i32 }
}
pub fn get_ascent(&self) -> i32
{
unsafe { al_get_font_ascent(self.get_font() as *const _) as i32 }
}
pub fn get_descent(&self) -> i32
{
unsafe { al_get_font_descent(self.get_font() as *const _) as i32 }
}
pub fn get_text_dimensions(&self, text: &str) -> (i32, i32, i32, i32)
{
unsafe {
let (mut x, mut y, mut w, mut h): (c_int, c_int, c_int, c_int) = mem::uninitialized();
let mut info: ALLEGRO_USTR_INFO = mem::uninitialized();
let ustr = al_ref_buffer(&mut info, text.as_ptr() as *const i8, text.len() as size_t);
al_get_ustr_dimensions(self.get_font() as *const _, ustr, &mut x, &mut y, &mut w, &mut h);
(x as i32, y as i32, w as i32, h as i32)
}
}
}
impl Drop for Font
{
fn drop(&mut self)
{
unsafe {
al_destroy_font(self.allegro_font);
}
}
}