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Don't use context after generating an image

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This commit is contained in:
Ali 2021-06-20 16:51:28 +04:00
parent 9131d607f7
commit b8a67d22d7
1 changed files with 8 additions and 3 deletions
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11
submodules/ImageTransparency/Sources/ImageTransparency.swift
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@ -92,14 +92,19 @@ public func imageRequiresInversion(_ cgImage: CGImage) -> Bool {
} }
if hasAlpha { if hasAlpha {
let probingContext = DrawingContext(size: CGSize(width: cgImage.width, height: cgImage.height))
probingContext.withContext { c in
c.draw(cgImage, in: CGRect(origin: CGPoint(), size: probingContext.size))
}
var matching: Int = 0 var matching: Int = 0
var total: Int = 0 var total: Int = 0
for y in 0 ..< Int(context.size.height) { for y in 0 ..< Int(probingContext.size.height) {
for x in 0 ..< Int(context.size.width) { for x in 0 ..< Int(probingContext.size.width) {
var saturation: CGFloat = 0.0 var saturation: CGFloat = 0.0
var brightness: CGFloat = 0.0 var brightness: CGFloat = 0.0
var alpha: CGFloat = 0.0 var alpha: CGFloat = 0.0
if context.colorAt(CGPoint(x: x, y: y)).getHue(nil, saturation: &saturation, brightness: &brightness, alpha: &alpha) { if probingContext.colorAt(CGPoint(x: x, y: y)).getHue(nil, saturation: &saturation, brightness: &brightness, alpha: &alpha) {
if alpha < 1.0 { if alpha < 1.0 {
hasAlpha = true hasAlpha = true
} }