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//
// UIImage+Helpers.swift
// MullvadVPN
//
// Created by Mojgan on 2024-10-10.
// Copyright © 2025 Mullvad VPN AB. All rights reserved.
//
import UIKit
extension UIImage {
// Function to resize image while keeping aspect ratio
// if `trimmingBorder` is specified, that number of pixels will be trimmed off each side before the remaining area is rendered to the new image
func resized(to: CGSize, trimmingBorder border: CGFloat = 0) -> UIImage {
let sourceSize = CGSize(width: size.width - 2 * border, height: size.height - 2 * border)
let widthRatio = to.width / sourceSize.width
let heightRatio = to.height / sourceSize.height
let scaleFactor = min(widthRatio, heightRatio)
let scaledBorder = border * scaleFactor
// Calculate new size based on the scale factor
let newSize = CGSize(width: sourceSize.width * scaleFactor, height: sourceSize.height * scaleFactor)
let renderer = UIGraphicsImageRenderer(size: newSize)
// Render the new image
let resizedImage = renderer.image { _ in
draw(
in: CGRect(
origin: .init(x: -scaledBorder, y: -scaledBorder),
size: .init(width: newSize.width + 2 * scaledBorder, height: newSize.height + 2 * scaledBorder)
)
)
}
return resizedImage.withRenderingMode(renderingMode)
}
func withAlpha(_ alpha: CGFloat) -> UIImage? {
return UIGraphicsImageRenderer(size: size, format: imageRendererFormat).image { _ in
draw(in: CGRect(origin: .zero, size: size), blendMode: .normal, alpha: alpha)
}
}
}
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