[RUST/IMAGE] ImageBuffer 구조체 : from_fn 연관 함수를 사용해 이미지 생성하기

■ ImageBuffer<P, Container> 구조체의 from_fn 연관 함수를 사용해 이미지를 생성하는 방법을 보여준다.

▶ Cargo.toml


[package]
name = "test_project"
version = "0.1.0"
edition = "2021"

# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html

[dependencies]
image = "0.23.14"

[package]

name = "test_project"

version = "0.1.0"

edition = "2021"

# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html

[dependencies]

image = "0.23.14"

▶ src/main.rs


use image;

fn main()
{
    let white_rgb : image::Rgb<u8> = image::Rgb::<u8>([255, 255, 255]);
    let red_rgb   : image::Rgb<u8> = image::Rgb::<u8>([255,  90,  90]);

    let checker_width : u32 = 64;

    let draw = |x, y|
    {
        let (x_index, y_index) = (x / checker_width, y / checker_width);

        match (x_index % 2, y_index % 2)
        {
            (0, 0) => white_rgb,
            (1, 0) => red_rgb,
            (0, 1) => red_rgb,
            (1, 1) => white_rgb,
            (_, _) => panic!("error"),
        }
    };

    let image_buffer : image::ImageBuffer<image::Rgb<u8>, Vec<u8>> = image::ImageBuffer::from_fn(512, 512, draw);

    image_buffer.save("d:/checkerboard.png").unwrap();
}

use image;

fn main()

{

let white_rgb : image::Rgb<u8> = image::Rgb::<u8>([255, 255, 255]);

let red_rgb : image::Rgb<u8> = image::Rgb::<u8>([255, 90, 90]);

let checker_width : u32 = 64;

let draw = |x, y|

{

let (x_index, y_index) = (x / checker_width, y / checker_width);

match (x_index % 2, y_index % 2)

{

(0, 0) => white_rgb,

(1, 0) => red_rgb,

(0, 1) => red_rgb,

(1, 1) => white_rgb,

(_, _) => panic!("error"),

}

};

let image_buffer : image::ImageBuffer<image::Rgb<u8>, Vec<u8>> = image::ImageBuffer::from_fn(512, 512, draw);

image_buffer.save("d:/checkerboard.png").unwrap();

}

test_project.zip