[RUST/IMAGE] 썸네일 이미지 파일 생성하기

■ 썸네일 이미지 파일을 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::{self, imageops, GenericImageView};

fn main()
{
    let target_image_size : u32 = 128;

    let argument_vector : Vec<String> = std::env::args().collect();

    if argument_vector.len() < 2
    {
        println!("[USAGE] image_thumb imagefile");

        return;
    }

    let source_file_path : String = String::from(&argument_vector[1]);

    let source_file_path_vector : Vec<&str> = source_file_path.split(".").collect();

    let target_file_path : String = format!("{}_thumbnail.png", source_file_path_vector[0]);

    println!("Source File Path : {}", source_file_path);
    println!("Target File Path : {}", target_file_path);

    let mut source_dynamic_image : image::DynamicImage = image::open(source_file_path).expect("파일 오픈시 에러가 발생했습니다.");

    let source_image_size : (u32, u32) = source_dynamic_image.dimensions();

    let target_image_width : u32 = if source_image_size.0 > source_image_size.1 { source_image_size.1 } else { source_image_size.0 };

    let mut cropped_image_buffer : image::ImageBuffer<image::Rgba<u8>, Vec<u8>> = imageops::crop
    (
        &mut source_dynamic_image,
        (source_image_size.0 - target_image_width) / 2,
        (source_image_size.1 - target_image_width) / 2,
        target_image_width,
        target_image_width
    ).to_image();

    let target_image_buffer : image::ImageBuffer<image::Rgba<u8>, Vec<u8>> = imageops::resize
    (
        &mut cropped_image_buffer,
        target_image_size,
        target_image_size,
        imageops::Lanczos3
    );

    target_image_buffer.save(target_file_path).unwrap();
}

use image::{self, imageops, GenericImageView};

fn main()

{

let target_image_size : u32 = 128;

let argument_vector : Vec<String> = std::env::args().collect();

if argument_vector.len() < 2

{

println!("[USAGE] image_thumb imagefile");

return;

}

let source_file_path : String = String::from(&argument_vector[1]);

let source_file_path_vector : Vec<&str> = source_file_path.split(".").collect();

let target_file_path : String = format!("{}_thumbnail.png", source_file_path_vector[0]);

println!("Source File Path : {}", source_file_path);

println!("Target File Path : {}", target_file_path);

let mut source_dynamic_image : image::DynamicImage = image::open(source_file_path).expect("파일 오픈시 에러가 발생했습니다.");

let source_image_size : (u32, u32) = source_dynamic_image.dimensions();

let target_image_width : u32 = if source_image_size.0 > source_image_size.1 { source_image_size.1 } else { source_image_size.0 };

let mut cropped_image_buffer : image::ImageBuffer<image::Rgba<u8>, Vec<u8>> = imageops::crop

(

&mut source_dynamic_image,

(source_image_size.0 - target_image_width) / 2,

(source_image_size.1 - target_image_width) / 2,

target_image_width,

target_image_width

).to_image();

let target_image_buffer : image::ImageBuffer<image::Rgba<u8>, Vec<u8>> = imageops::resize

(

&mut cropped_image_buffer,

target_image_size,

imageops::Lanczos3

);

target_image_buffer.save(target_file_path).unwrap();

}

test_project.zip