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Merge pull request #574 from exyte/bug/548-ImageContextStack-is-not-safe
Remove imageContextStack, add scale property to CGContext
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commit
c8c9505b83
@ -160,4 +160,20 @@ extension MBezierPath {
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}
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}
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extension CGContext {
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private struct CGContextScale {
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static var _scale: CGFloat = 0.0
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}
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var scale: CGFloat {
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get {
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return CGContextScale._scale
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}
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set(newValue) {
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CGContextScale._scale = newValue
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}
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}
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}
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#endif
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@ -11,8 +11,6 @@ import Foundation
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#if os(OSX)
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import AppKit
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private var imageContextStack: [CGFloat] = []
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func MGraphicsGetCurrentContext() -> CGContext? {
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return NSGraphicsContext.current?.cgContext
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}
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@ -54,8 +52,6 @@ func MGraphicsBeginImageContextWithOptions(_ size: CGSize, _ opaque: Bool, _ sca
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let height = Int(size.height * scale)
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if width > 0 && height > 0 {
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imageContextStack.append(scale)
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let colorSpace = CGColorSpaceCreateDeviceRGB()
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guard let ctx = CGContext(data: nil, width: width, height: height, bitsPerComponent: 8, bytesPerRow: 4 * width, space: colorSpace, bitmapInfo: (opaque ? CGImageAlphaInfo.noneSkipFirst.rawValue : CGImageAlphaInfo.premultipliedFirst.rawValue)) else {
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@ -64,32 +60,24 @@ func MGraphicsBeginImageContextWithOptions(_ size: CGSize, _ opaque: Bool, _ sca
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ctx.concatenate(CGAffineTransform(a: 1, b: 0, c: 0, d: -1, tx: 0, ty: CGFloat(height)))
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ctx.scaleBy(x: scale, y: scale)
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ctx.scale = scale
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MGraphicsPushContext(ctx)
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}
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}
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func MGraphicsGetImageFromCurrentImageContext() -> MImage? {
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if !imageContextStack.isEmpty {
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guard let ctx = MGraphicsGetCurrentContext() else {
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return nil
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}
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let scale = imageContextStack.last!
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if let theCGImage = ctx.makeImage() {
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let size = CGSize(width: CGFloat(ctx.width) / scale, height: CGFloat(ctx.height) / scale)
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let image = NSImage(cgImage: theCGImage, size: size)
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return image
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}
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guard let ctx = MGraphicsGetCurrentContext(),
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let theCGImage = ctx.makeImage() else {
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return nil
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}
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return nil
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let scale = ctx.scale
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let size = CGSize(width: CGFloat(ctx.width) / scale, height: CGFloat(ctx.height) / scale)
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let image = NSImage(cgImage: theCGImage, size: size)
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return image
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}
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func MGraphicsEndImageContext() {
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if imageContextStack.last != nil {
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imageContextStack.removeLast()
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MGraphicsPopContext()
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}
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MGraphicsPopContext()
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}
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func MNoIntrinsicMetric() -> CGFloat {
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