Open Source Swift API สำหรับการประมวลผลรูปภาพฝั่งเซิร์ฟเวอร์

ติดตั้ง <แข็งแรง> SwiftGD ผ่าน Github 

Install SwiftGD via Github 

 $ git clone https://github.com/twostraws/SwiftGD.git

การสร้างรูปภาพใหม่ผ่านห้องสมุด Swift

 import Foundation
import SwiftGD
// figure out where to save our file
let currentDirectory = URL(fileURLWithPath: FileManager().currentDirectoryPath)
let destination = currentDirectory.appendingPathComponent("output-1.png")
// attempt to create a new 500x500 image
if let image = Image(width: 500, height: 500) {
    // flood from from X:250 Y:250 using red
    image.fill(from: Point(x: 250, y: 250), color: Color.red)
    // draw a filled blue ellipse in the center
    image.fillEllipse(center: Point(x: 250, y: 250), size: Size(width: 150, height: 150), color: Color.blue)
    // draw a filled green rectangle also in the center
    image.fillRectangle(topLeft: Point(x: 200, y: 200), bottomRight: Point(x: 300, y: 300), color: Color.green)
    // remove all the colors from the image
    image.desaturate()
    // now apply a dark red tint
    image.colorize(using: Color(red: 0.3, green: 0, blue: 0, alpha: 1))
    // save the final image to disk
    image.write(to: destination)
}

วาดรูปสี่เหลี่ยมผืนผ้าผ่าน Swift API

 import Foundation
import SwiftGD
let currentDirectory = URL(fileURLWithPath: FileManager().currentDirectoryPath)
let destination = currentDirectory.appendingPathComponent("output-2.png")
if let image = Image(width: 500, height: 500) {
    var counter = 0
    for i in stride(from: 0, to: 250, by: 10) {
        let drawColor: Color
        if counter % 2 == 0 {
            drawColor = .blue
        } else {
            drawColor = .white
        }
        image.fillRectangle(topLeft: Point(x: i, y: i), bottomRight: Point(x: 500 - i, y: 500 - i), color: drawColor)
        counter += 1
    }
    image.blur(radius: 10)
    image.write(to: destination)
}

สร้างการไล่ระดับสีผ่าน Swift API

 import Foundation
import SwiftGD
let currentDirectory = URL(fileURLWithPath: FileManager().currentDirectoryPath)
let destination = currentDirectory.appendingPathComponent("output-3.png")
let size = 500
if let image = Image(width: size, height: size) {
    for x in 0 ... size {
        for y in 0 ... size {
            image.set(pixel: Point(x: x, y: y), to: Color(red: Double(x) / Double(size), green: Double(y) / Double(size), blue: 0, alpha: 1))
        }
    }
    image.write(to: destination)
}

อ่านรูปภาพผ่าน Swift API

 let location = URL(fileURLWithPath: "/path/to/image.png")
let image = Image(url: location)