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Fix crash

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This commit is contained in:
Ali 2021-07-15 19:43:16 +02:00
parent 34de467c35
commit 375e7bb8f6
1 changed files with 25 additions and 4 deletions
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29
submodules/GradientBackground/Sources/SoftwareGradientBackground.swift
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@ -71,7 +71,9 @@ public func adjustSaturationInContext(context: DrawingContext, saturation: CGFlo
vImageMatrixMultiply_ARGB8888(&buffer, &buffer, &matrix, divisor, nil, nil, vImage_Flags(kvImageDoNotTile)) vImageMatrixMultiply_ARGB8888(&buffer, &buffer, &matrix, divisor, nil, nil, vImage_Flags(kvImageDoNotTile))
} }
private func generateGradient(size: CGSize, colors: [UIColor], positions: [CGPoint], adjustSaturation: CGFloat = 1.0) -> UIImage { private func generateGradient(size: CGSize, colors inputColors: [UIColor], positions: [CGPoint], adjustSaturation: CGFloat = 1.0) -> UIImage {
let colors: [UIColor] = inputColors.count == 1 ? [inputColors[0], inputColors[0], inputColors[0]] : inputColors
let width = Int(size.width) let width = Int(size.width)
let height = Int(size.height) let height = Int(size.height)
@ -146,10 +148,29 @@ private func generateGradient(size: CGSize, colors: [UIColor], positions: [CGPoi
b = b + distance * rgb[i * 3 + 2] b = b + distance * rgb[i * 3 + 2]
} }
if distanceSum < 0.00001 {
distanceSum = 0.00001
}
var pixelB = b / distanceSum * 255.0
if pixelB > 255.0 {
pixelB = 255.0
}
var pixelG = g / distanceSum * 255.0
if pixelG > 255.0 {
pixelG = 255.0
}
var pixelR = r / distanceSum * 255.0
if pixelR > 255.0 {
pixelR = 255.0
}
let pixelBytes = lineBytes.advanced(by: x * 4) let pixelBytes = lineBytes.advanced(by: x * 4)
pixelBytes.advanced(by: 0).pointee = UInt8(b / distanceSum * 255.0) pixelBytes.advanced(by: 0).pointee = UInt8(pixelB)
pixelBytes.advanced(by: 1).pointee = UInt8(g / distanceSum * 255.0) pixelBytes.advanced(by: 1).pointee = UInt8(pixelG)
pixelBytes.advanced(by: 2).pointee = UInt8(r / distanceSum * 255.0) pixelBytes.advanced(by: 2).pointee = UInt8(pixelR)
pixelBytes.advanced(by: 3).pointee = 0xff pixelBytes.advanced(by: 3).pointee = 0xff
} }
} }