re add ios 16 support

shaders only show if 17+
blurReplace transitions are opacity with a white shadow for a short time

ShhShell/SSH/SSHHandler.swift

@@ -7,7 +7,6 @@
 
 import Foundation
 import LibSSH
-import libssh2
 import OSLog
 import SwiftUI
 import SwiftTerm

ShhShell/Terminal/ShaderTestingView.swift

@@ -11,69 +11,71 @@ struct ShaderTestingView: View {
 	@State private var start = Date.now
 	
 	var body: some View {
-		TimelineView(.animation) { tl in
-			let time = start.distance(to: tl.date)
-			ZStack {
-				VStack {
-					HStack {
-						Image(systemName: "figure.walk.circle")
-							.resizable().scaledToFit()
-							.foregroundStyle(.blue)
-						Image(systemName: "arrow.right")
-							.foregroundStyle(.gray)
-							.frame(width: 25, height: 25)
-						Image(systemName: "figure.walk.circle")
-							.resizable().scaledToFit()
-							.foregroundStyle(.blue)
-							.colorEffect(ShaderLibrary.redify())
-					}
-					
-					Image(systemName: "figure.walk.circle")
-						.resizable().scaledToFit()
-						.foregroundStyle(.blue)
-						.colorEffect(ShaderLibrary.rainbow(.float(time)))
-					
-					Image(systemName: "figure.walk.circle")
-						.resizable().scaledToFit()
-						.foregroundStyle(.blue)
-						.distortionEffect(
-							ShaderLibrary.wave(.float(time)),
-							maxSampleOffset: .zero
-						)
-					Rectangle()
-						.padding(.vertical, 20)
-						.foregroundStyle(.red)
-						.compositingGroup()
-						.visualEffect {
-							content,
-							proxy in
-							content.distortionEffect(
-								ShaderLibrary.waveFlag(.float(time), .float2(proxy.size)),
-								maxSampleOffset: CGSize(width: 0, height: 40)
-							)
+		if #available(iOS 17, *) {
+			TimelineView(.animation) { tl in
+				let time = start.distance(to: tl.date)
+				ZStack {
+					VStack {
+						HStack {
+							Image(systemName: "figure.walk.circle")
+								.resizable().scaledToFit()
+								.foregroundStyle(.blue)
+							Image(systemName: "arrow.right")
+								.foregroundStyle(.gray)
+								.frame(width: 25, height: 25)
+							Image(systemName: "figure.walk.circle")
+								.resizable().scaledToFit()
+								.foregroundStyle(.blue)
+								.colorEffect(ShaderLibrary.redify())
 						}
-					
-					Rectangle()
-						.colorEffect(
-							ShaderLibrary.sinebow(.float2(300, 200), .float(time))
-						)
-				}
-				.brightness(0.2)
-				
-				Rectangle()
-					.foregroundStyle(.black.opacity(1))
-					.visualEffect { content, proxy in
-						content
-							.colorEffect(
-								ShaderLibrary.crt(
-									.float2(proxy.size),
-									.float(time)
+						
+						Image(systemName: "figure.walk.circle")
+							.resizable().scaledToFit()
+							.foregroundStyle(.blue)
+							.colorEffect(ShaderLibrary.rainbow(.float(time)))
+						
+						Image(systemName: "figure.walk.circle")
+							.resizable().scaledToFit()
+							.foregroundStyle(.blue)
+							.distortionEffect(
+								ShaderLibrary.wave(.float(time)),
+								maxSampleOffset: .zero
+							)
+						Rectangle()
+							.padding(.vertical, 20)
+							.foregroundStyle(.red)
+							.compositingGroup()
+							.visualEffect {
+								content,
+								proxy in
+								content.distortionEffect(
+									ShaderLibrary.waveFlag(.float(time), .float2(proxy.size)),
+									maxSampleOffset: CGSize(width: 0, height: 40)
 								)
+							}
+						
+						Rectangle()
+							.colorEffect(
+								ShaderLibrary.sinebow(.float2(300, 200), .float(time))
 							)
 					}
-					.opacity(0.75)
-					.blendMode(.overlay)
-					.allowsHitTesting(false)
+					.brightness(0.2)
+					
+					Rectangle()
+						.foregroundStyle(.black.opacity(1))
+						.visualEffect { content, proxy in
+							content
+								.colorEffect(
+									ShaderLibrary.crt(
+										.float2(proxy.size),
+										.float(time)
+									)
+								)
+						}
+						.opacity(0.75)
+						.blendMode(.overlay)
+						.allowsHitTesting(false)
+				}
 			}
 		}
 	}

ShhShell/Views/Onboarding/WelcomeChunk.swift

@@ -31,13 +31,13 @@ struct WelcomeChunk: View {
 						Text(title)
 							.bold()
 							.font(.headline)
-							.transition(.blurReplace)
+							.transition(.opacity)
 					}
 					if time > delay+0.75 && !para.isEmpty {
 						Text(para)
 							.foregroundStyle(.gray)
 							.font(.footnote)
-							.transition(.blurReplace)
+							.transition(.opacity)
 							.lineLimit(nil)
 							.multilineTextAlignment(.leading)
 					}

ShhShell/Views/Onboarding/WelcomeView.swift

@@ -29,7 +29,8 @@ struct WelcomeView: View {
 							.monospaced()
 							.font(.largeTitle)
 							.bold()
-							.transition(.blurReplace)
+							.transition(.opacity)
+							.shadow(color: .white, radius: time > 2.25 ? 0 : 5)
 					}
 				}
 //				.padding(.top, time > 3 ? 25 : 0)

ShhShell/Views/Terminal/CRTView.swift

@@ -13,17 +13,19 @@ struct CRTView: View {
 	var body: some View {
 		TimelineView(.animation) { tl in
 			let time = tl.date.distance(to: startTime)
-			Rectangle()
-				.foregroundStyle(.black.opacity(1))
-				.visualEffect { content, proxy in
-					content
-						.colorEffect(
-							ShaderLibrary.crt(
-								.float2(proxy.size),
-								.float(time)
+			if #available(iOS 17, *) {
+				Rectangle()
+					.foregroundStyle(.black.opacity(1))
+					.visualEffect { content, proxy in
+						content
+							.colorEffect(
+								ShaderLibrary.crt(
+									.float2(proxy.size),
+									.float(time)
+								)
 							)
-						)
-				}
+					}
+			}
 		}
 	}
 }