Use CoreGraphics to draw instead of SwifTUI2.0.0

1 files changed, 19 insertions, 0 deletions

diff --git a/Sources/Patterns/CGImage+resize.swift b/Sources/Patterns/CGImage+resize.swift
new file mode 100644
index 0000000..72ef00e
--- /dev/null
+++ b/Sources/Patterns/CGImage+resize.swift
@@ -0,0 +1,19 @@
+import CoreGraphics
+
+extension CGImage {
+    func resize(size:CGSize) -> CGImage? {
+        let width: Int = Int(size.width)
+        let height: Int = Int(size.height)
+
+        let bytesPerPixel = self.bitsPerPixel / self.bitsPerComponent
+        let destBytesPerRow = width * bytesPerPixel
+
+        guard let colorSpace = self.colorSpace else { return nil }
+        guard let context = CGContext(data: nil, width: width, height: height, bitsPerComponent: self.bitsPerComponent, bytesPerRow: destBytesPerRow, space: colorSpace, bitmapInfo: self.alphaInfo.rawValue) else { return nil }
+
+        context.interpolationQuality = .none
+        context.draw(self, in: CGRect(x: 0, y: 0, width: width, height: height))
+
+        return context.makeImage()
+    }
+}