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Adjust blurs

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This commit is contained in:
Ali
2021-06-16 00:35:58 +04:00
parent 94abbecdd6
commit 91d88e63a3
5 changed files with 96 additions and 53 deletions
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74
submodules/GradientBackground/Sources/SoftwareGradientBackground.swift
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@@ -32,6 +32,45 @@ private func interpolatePoints(_ point1: CGPoint, _ point2: CGPoint, at factor:
return CGPoint(x: interpolateFloat(point1.x, point2.x, at: factor), y: interpolateFloat(point1.y, point2.y, at: factor))
}
public func adjustSaturationInContext(context: DrawingContext, saturation: CGFloat) {
var buffer = vImage_Buffer()
buffer.data = context.bytes
buffer.width = UInt(context.size.width * context.scale)
buffer.height = UInt(context.size.height * context.scale)
buffer.rowBytes = context.bytesPerRow
let divisor: Int32 = 0x1000
let rwgt: CGFloat = 0.3086
let gwgt: CGFloat = 0.6094
let bwgt: CGFloat = 0.0820
let adjustSaturation = saturation
let a = (1.0 - adjustSaturation) * rwgt + adjustSaturation
let b = (1.0 - adjustSaturation) * rwgt
let c = (1.0 - adjustSaturation) * rwgt
let d = (1.0 - adjustSaturation) * gwgt
let e = (1.0 - adjustSaturation) * gwgt + adjustSaturation
let f = (1.0 - adjustSaturation) * gwgt
let g = (1.0 - adjustSaturation) * bwgt
let h = (1.0 - adjustSaturation) * bwgt
let i = (1.0 - adjustSaturation) * bwgt + adjustSaturation
let satMatrix: [CGFloat] = [
a, b, c, 0,
d, e, f, 0,
g, h, i, 0,
0, 0, 0, 1
]
var matrix: [Int16] = satMatrix.map { value in
return Int16(value * CGFloat(divisor))
}
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 {
let width = Int(size.width)
let height = Int(size.height)
@@ -116,40 +155,7 @@ private func generateGradient(size: CGSize, colors: [UIColor], positions: [CGPoi
}
if abs(adjustSaturation - 1.0) > .ulpOfOne {
var buffer = vImage_Buffer()
buffer.data = context.bytes
buffer.width = UInt(width)
buffer.height = UInt(height)
buffer.rowBytes = context.bytesPerRow
let divisor: Int32 = 0x1000
let rwgt: CGFloat = 0.3086
let gwgt: CGFloat = 0.6094
let bwgt: CGFloat = 0.0820
let a = (1.0 - adjustSaturation) * rwgt + adjustSaturation
let b = (1.0 - adjustSaturation) * rwgt
let c = (1.0 - adjustSaturation) * rwgt
let d = (1.0 - adjustSaturation) * gwgt
let e = (1.0 - adjustSaturation) * gwgt + adjustSaturation
let f = (1.0 - adjustSaturation) * gwgt
let g = (1.0 - adjustSaturation) * bwgt
let h = (1.0 - adjustSaturation) * bwgt
let i = (1.0 - adjustSaturation) * bwgt + adjustSaturation
let satMatrix: [CGFloat] = [
a, b, c, 0,
d, e, f, 0,
g, h, i, 0,
0, 0, 0, 1
]
var matrix: [Int16] = satMatrix.map { value in
return Int16(value * CGFloat(divisor))
}
vImageMatrixMultiply_ARGB8888(&buffer, &buffer, &matrix, divisor, nil, nil, vImage_Flags(kvImageDoNotTile))
adjustSaturationInContext(context: context, saturation: adjustSaturation)
}
return context.generateImage()!