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ios: colored and clickable qr code with logo (#1885)

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* ios: colored and clickable qr code with logo

* size of circle

* same padding as in android

* add padding to logo

---------

Co-authored-by: Evgeny Poberezkin <2769109+epoberezkin@users.noreply.github.com>
This commit is contained in:
Stanislav Dmitrenko
2023-02-06 11:45:56 +03:00
committed by GitHub
parent 5082f5b4a4
commit 8a445ece90
2 changed files with 90 additions and 3 deletions
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50
apps/ios/Shared/Model/ImageUtils.swift
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@@ -133,7 +133,7 @@ func imageHasAlpha(_ img: UIImage) -> Bool {
context.draw(cgImage, in: CGRect(x: 0, y: 0, width: cgImage.width, height: cgImage.height))
if let data = context.data {
let data = data.assumingMemoryBound(to: UInt8.self)
let size = cgImage.width * cgImage.height
let size = cgImage.width * cgImage.height * 4
var i = 0
while i < size {
if data[i] < 255 { return true }
@@ -203,3 +203,51 @@ func dropImagePrefix(_ s: String) -> String {
private func dropPrefix(_ s: String, _ prefix: String) -> String {
s.hasPrefix(prefix) ? String(s.dropFirst(prefix.count)) : s
}
extension UIImage {
func replaceColor(_ from: UIColor, _ to: UIColor) -> UIImage {
if let cgImage = cgImage {
let colorSpace = CGColorSpaceCreateDeviceRGB()
let bitmapInfo = CGBitmapInfo(rawValue: CGImageAlphaInfo.premultipliedFirst.rawValue)
if let context = CGContext(data: nil, width: cgImage.width, height: cgImage.height, bitsPerComponent: 8, bytesPerRow: cgImage.width * 4, space: colorSpace, bitmapInfo: bitmapInfo.rawValue) {
context.draw(cgImage, in: CGRect(x: 0, y: 0, width: cgImage.width, height: cgImage.height))
if let data = context.data {
var fromAlpha: CGFloat = 0
var fromRed: CGFloat = 0
var fromGreen: CGFloat = 0
var fromBlue: CGFloat = 0
var toAlpha: CGFloat = 0
var toRed: CGFloat = 0
var toGreen: CGFloat = 0
var toBlue: CGFloat = 0
from.getRed(&fromRed, green: &fromGreen, blue: &fromBlue, alpha: &fromAlpha)
to.getRed(&toRed, green: &toGreen, blue: &toBlue, alpha: &toAlpha)
let fAlpha = UInt8(UInt8(fromAlpha * 255))
let fRed = UInt8(fromRed * 255)
let fGreen = UInt8(fromGreen * 255)
let fBlue = UInt8(fromBlue * 255)
let tAlpha = UInt8(toAlpha * 255)
let tRed = UInt8(toRed * 255)
let tGreen = UInt8(toGreen * 255)
let tBlue = UInt8(toBlue * 255)
let data = data.assumingMemoryBound(to: UInt8.self)
let size = cgImage.width * cgImage.height * 4
var i = 0
while i < size {
if data[i] == fAlpha && data[i + 1] == fRed && data[i + 2] == fGreen && data[i + 3] == fBlue {
data[i + 0] = tAlpha
data[i + 1] = tRed
data[i + 2] = tGreen
data[i + 3] = tBlue
}
i += 4
}
}
if let img = context.makeImage() {
return UIImage(cgImage: img)
}
}
}
return self
}
}