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Fix warning

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This commit is contained in:
Ilya Laktyushin 2023-03-07 12:52:34 +04:00
parent c44260bdff
commit c5cf2e88be
1 changed files with 22 additions and 8 deletions
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30
submodules/ImageTransparency/Sources/ImageTransparency.swift
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@ -29,17 +29,31 @@ private func generateHistogram(cgImage: CGImage) -> ([[vImagePixelCount]], Int)?
}
assert(error == kvImageNoError)
let histogramBins: [[vImagePixelCount]] = (0...3).map { _ in
return [vImagePixelCount](repeating: 0, count: 256)
var histogramBinZero = [vImagePixelCount](repeating: 0, count: 256)
var histogramBinOne = [vImagePixelCount](repeating: 0, count: 256)
var histogramBinTwo = [vImagePixelCount](repeating: 0, count: 256)
var histogramBinThree = [vImagePixelCount](repeating: 0, count: 256)
histogramBinZero.withUnsafeMutableBufferPointer { zeroPtr in
histogramBinOne.withUnsafeMutableBufferPointer { onePtr in
histogramBinTwo.withUnsafeMutableBufferPointer { twoPtr in
histogramBinThree.withUnsafeMutableBufferPointer { threePtr in
var histogramBins = [zeroPtr.baseAddress, onePtr.baseAddress, twoPtr.baseAddress, threePtr.baseAddress]
histogramBins.withUnsafeMutableBufferPointer { histogramBinsPtr in
let error = vImageHistogramCalculation_ARGB8888(
&sourceBuffer,
histogramBinsPtr.baseAddress!,
noFlags
)
assert(error == kvImageNoError)
}
}
}
}
}
var mutableHistogram: [UnsafeMutablePointer<vImagePixelCount>?] = histogramBins.map {
return UnsafeMutablePointer<vImagePixelCount>(mutating: $0)
}
error = vImageHistogramCalculation_ARGB8888(&sourceBuffer, &mutableHistogram, noFlags)
assert(error == kvImageNoError)
let alphaBinIndex = [.last, .premultipliedLast].contains(cgImage.alphaInfo) ? 3 : 0
return (histogramBins, alphaBinIndex)
return ([histogramBinZero, histogramBinOne, histogramBinTwo, histogramBinThree], alphaBinIndex)
}
public func imageHasTransparency(_ cgImage: CGImage) -> Bool {