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Changelog-Fixed: Fixed crash on some SVG profile pictures Closes: #416translations_damus-localizations-en-us-xcloc-localized-contents-en-us-xliff--master_pl_PL
OlegAba
2 years ago
committed by
William Casarin
William Casarin
4 changed files with 116 additions and 38 deletions
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// |
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// CoreSVG.swift |
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// damus |
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// |
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// Created by Oleg Abalonski on 1/27/23. |
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// Ref: https://gist.github.com/ollieatkinson/eb87a82fcb5500d5561fed8b0900a9f7 |
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import Darwin |
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import Foundation |
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import UIKit |
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@objc |
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class CGSVGDocument: NSObject { } |
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var CGSVGDocumentRetain: (@convention(c) (CGSVGDocument?) -> Unmanaged<CGSVGDocument>?) = load("CGSVGDocumentRetain") |
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var CGSVGDocumentRelease: (@convention(c) (CGSVGDocument?) -> Void) = load("CGSVGDocumentRelease") |
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var CGSVGDocumentCreateFromData: (@convention(c) (CFData?, CFDictionary?) -> Unmanaged<CGSVGDocument>?) = load("CGSVGDocumentCreateFromData") |
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var CGContextDrawSVGDocument: (@convention(c) (CGContext?, CGSVGDocument?) -> Void) = load("CGContextDrawSVGDocument") |
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var CGSVGDocumentGetCanvasSize: (@convention(c) (CGSVGDocument?) -> CGSize) = load("CGSVGDocumentGetCanvasSize") |
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typealias ImageWithCGSVGDocument = @convention(c) (AnyObject, Selector, CGSVGDocument) -> UIImage |
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var ImageWithCGSVGDocumentSEL: Selector = NSSelectorFromString("_imageWithCGSVGDocument:") |
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let CoreSVG = dlopen("/System/Library/PrivateFrameworks/CoreSVG.framework/CoreSVG", RTLD_NOW) |
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func load<T>(_ name: String) -> T { |
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unsafeBitCast(dlsym(CoreSVG, name), to: T.self) |
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} |
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public class SVG { |
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deinit { CGSVGDocumentRelease(document) } |
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let document: CGSVGDocument |
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public convenience init?(_ value: String) { |
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guard let data = value.data(using: .utf8) else { return nil } |
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self.init(data) |
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} |
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public init?(_ data: Data) { |
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guard let document = CGSVGDocumentCreateFromData(data as CFData, nil)?.takeUnretainedValue() else { return nil } |
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guard CGSVGDocumentGetCanvasSize(document) != .zero else { return nil } |
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self.document = document |
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} |
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public var size: CGSize { |
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CGSVGDocumentGetCanvasSize(document) |
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} |
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public func image() -> UIImage? { |
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let ImageWithCGSVGDocument = unsafeBitCast(UIImage.self.method(for: ImageWithCGSVGDocumentSEL), to: ImageWithCGSVGDocument.self) |
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let image = ImageWithCGSVGDocument(UIImage.self, ImageWithCGSVGDocumentSEL, document) |
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return image |
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} |
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public func draw(in context: CGContext) { |
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draw(in: context, size: size) |
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} |
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public func draw(in context: CGContext, size target: CGSize) { |
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var target = target |
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let ratio = ( |
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x: target.width / size.width, |
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y: target.height / size.height |
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) |
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let rect = ( |
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document: CGRect(origin: .zero, size: size), () |
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) |
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let scale: (x: CGFloat, y: CGFloat) |
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if target.width <= 0 { |
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scale = (ratio.y, ratio.y) |
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target.width = size.width * scale.x |
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} else if target.height <= 0 { |
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scale = (ratio.x, ratio.x) |
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target.width = size.width * scale.y |
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} else { |
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let min = min(ratio.x, ratio.y) |
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scale = (min, min) |
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target.width = size.width * scale.x |
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target.height = size.height * scale.y |
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} |
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let transform = ( |
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scale: CGAffineTransform(scaleX: scale.x, y: scale.y), |
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aspect: CGAffineTransform(translationX: (target.width / scale.x - rect.document.width) / 2, y: (target.height / scale.y - rect.document.height) / 2) |
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) |
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context.translateBy(x: 0, y: target.height) |
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context.scaleBy(x: 1, y: -1) |
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context.concatenate(transform.scale) |
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context.concatenate(transform.aspect) |
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CGContextDrawSVGDocument(context, document) |
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} |
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} |
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