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
#![crate_name="orbimage"]
#![crate_type="lib"]
extern crate orbclient;
use std::cmp;
use std::fs::File;
use std::io::Read;
use std::path::Path;
use orbclient::{Color, Renderer};
pub use bmp::parse as parse_bmp;
pub use jpg::parse as parse_jpg;
pub use png::parse as parse_png;
pub mod bmp;
pub mod jpg;
pub mod png;
pub struct ImageRoi<'a> {
x: u32,
y: u32,
w: u32,
h: u32,
image: &'a Image
}
impl<'a> ImageRoi<'a> {
pub fn draw<R: Renderer>(&self, renderer: &mut R, x: i32, mut y: i32) {
let stride = self.image.w;
let mut offset = (self.y * stride + self.x) as usize;
let last_offset = cmp::min(((self.y + self.h) * stride + self.x) as usize, self.image.data.len());
while offset < last_offset {
let next_offset = offset + stride as usize;
renderer.image(x, y, self.w, 1, &self.image.data[offset..]);
offset = next_offset;
y += 1;
}
}
}
pub struct Image {
w: u32,
h: u32,
data: Box<[Color]>
}
impl Image {
pub fn new(width: u32, height: u32) -> Self {
Self::from_color(width, height, Color::rgb(0, 0, 0))
}
pub fn from_color(width: u32, height: u32, color: Color) -> Self {
Self::from_data(width, height, vec![color; width as usize * height as usize].into_boxed_slice()).unwrap()
}
pub fn from_data(width: u32, height: u32, data: Box<[Color]>) -> Result<Self, String> {
if (width * height) as usize != data.len() {
return Err("not enough or too much data given compared to width and height".to_string())
}
Ok(Image {
w: width,
h: height,
data: data,
})
}
pub fn from_path<P: AsRef<Path>>(path: P) -> Result<Self, String> {
let mut file = try!(File::open(&path).map_err(|err| format!("failed to open image: {}", err)));
let mut data: Vec<u8> = Vec::new();
let _ = try!(file.read_to_end(&mut data).map_err(|err| format!("failed to read image: {}", err)));
match path.as_ref().extension() {
Some(extension_os) => match extension_os.to_str() {
Some(extension) => match extension.to_lowercase().as_str() {
"bmp" => parse_bmp(&data),
"jpg" | "jpeg" => parse_jpg(&data),
"png" => parse_png(&data),
other => Err(format!("unknown image extension: {}", other))
},
None => Err("image extension not valid unicode".to_string())
},
None => Err("no image extension".to_string())
}
}
pub fn default() -> Self {
Self::new(0, 0)
}
pub fn roi<'a>(&'a self, x: u32, y: u32, w: u32, h: u32) -> ImageRoi<'a> {
let x1 = cmp::min(x, self.width());
let y1 = cmp::min(y, self.height());
let x2 = cmp::max(x1, cmp::min(x + w, self.width()));
let y2 = cmp::max(y1, cmp::min(y + h, self.height()));
ImageRoi {
x: x1,
y: y1,
w: x2 - x1,
h: y2 - y1,
image: self
}
}
pub fn into_data(self) -> Box<[Color]> {
self.data
}
pub fn draw<R: Renderer>(&self, renderer: &mut R, x: i32, y: i32) {
renderer.image(x, y, self.w, self.h, &self.data);
}
}
impl Renderer for Image {
fn width(&self) -> u32 {
self.w
}
fn height(&self) -> u32 {
self.h
}
fn data(&self) -> &[Color] {
&self.data
}
fn data_mut(&mut self) -> &mut [Color] {
&mut self.data
}
fn sync(&mut self) -> bool {
true
}
}