[rbdr/captura] / Captura / Core Extensions / CGImage+resize.swift

import CoreGraphics

extension CGImage {
  func resize(by scale: CGFloat) -> CGImage? {
    let width = Int(CGFloat(self.width) / scale)
    let height = Int(CGFloat(self.height) / scale)
    
    let bitsPerComponent = self.bitsPerComponent
    let colorSpace = self.colorSpace ?? CGColorSpace(name: CGColorSpace.sRGB)!
    let bitmapInfo = self.bitmapInfo.rawValue
    
    guard let context = CGContext(data: nil, width: width, height: height, bitsPerComponent: bitsPerComponent, bytesPerRow: 0, space: colorSpace, bitmapInfo: bitmapInfo) else {
        return nil
    }
    
    context.interpolationQuality = .high
    context.draw(self, in: CGRect(x: 0, y: 0, width: width, height: height))
    
    return context.makeImage()
  }
}
Commit	Line	Data
f5d16c1c RBR	1	import CoreGraphics
	2
	3	extension CGImage {
	4	func resize(by scale: CGFloat) -> CGImage? {
	5	let width = Int(CGFloat(self.width) / scale)
	6	let height = Int(CGFloat(self.height) / scale)
	7
	8	let bitsPerComponent = self.bitsPerComponent
	9	let colorSpace = self.colorSpace ?? CGColorSpace(name: CGColorSpace.sRGB)!
	10	let bitmapInfo = self.bitmapInfo.rawValue
	11
	12	guard let context = CGContext(data: nil, width: width, height: height, bitsPerComponent: bitsPerComponent, bytesPerRow: 0, space: colorSpace, bitmapInfo: bitmapInfo) else {
	13	return nil
	14	}
	15
	16	context.interpolationQuality = .high
	17	context.draw(self, in: CGRect(x: 0, y: 0, width: width, height: height))
	18
	19	return context.makeImage()
	20	}
	21	}