image 0.2.0-alpha

a pure rust imaging library
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

//! Functions for performing affine transformations.

use color::{ Pixel, Primitive };
use image:: {
    GenericImage,
    ImageBuf,
};

///Rotate an image 90 degrees clockwise.
pub fn rotate90<P: Primitive, T: Pixel<P>, I: GenericImage<T>>(image:  &I) -> ImageBuf<T> {
    let (width, height) = image.dimensions();
    let mut out = ImageBuf::new(height, width);

    for y in range(0, height) {
        for x in range(0, width) {
            let p = image.get_pixel(x, y);
            out.put_pixel(height - 1 - y, x, p);
        }
    }

    out
}

///Rotate an image 180 degrees clockwise.
pub fn rotate180<P: Primitive, T: Pixel<P>, I: GenericImage<T>>(image:  &I) -> ImageBuf<T> {
    let (width, height) = image.dimensions();
    let mut out = ImageBuf::new(width, height);

    for y in range(0, height) {
        for x in range(0, width) {
            let p = image.get_pixel(x, y);
            out.put_pixel(width - 1 - x, height - 1 - y, p);
        }
    }

    out
}

///Rotate an image 270 degrees clockwise.
pub fn rotate270<P: Primitive, T: Pixel<P>, I: GenericImage<T>>(image:  &I) -> ImageBuf<T> {
    let (width, height) = image.dimensions();
    let mut out = ImageBuf::new(height, width);

    for y in range(0, height) {
        for x in range(0, width) {
            let p = image.get_pixel(x, y);
            out.put_pixel(y, width - 1 - x, p);
        }
    }

    out
}

///Flip an image horizontally
pub fn flip_horizontal<P: Primitive, T: Pixel<P>, I: GenericImage<T>>(image:  &I) -> ImageBuf<T> {
    let (width, height) = image.dimensions();
    let mut out = ImageBuf::new(height, width);

    for y in range(0, height) {
        for x in range(0, width) {
            let p = image.get_pixel(x, y);
            out.put_pixel(width - 1 - x, y, p);
        }
    }

    out
}

///Flip an image vertically
pub fn flip_vertical<P: Primitive, T: Pixel<P>, I: GenericImage<T>>(image:  &I) -> ImageBuf<T> {
    let (width, height) = image.dimensions();
    let mut out = ImageBuf::new(width, height);

    for y in range(0, height) {
        for x in range(0, width) {
            let p = image.get_pixel(x, y);
            out.put_pixel(x, height - 1 - y, p);
        }
    }

    out
}