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The iPhone Duo tabletop layout mirrors every presented frame into the lower half, blurred and fading out, like a screen standing on a glossy table. The render view blits a quarter-resolution copy of the display framebuffer into a ring of IOSurface-backed buffers (no Y flip, so the surface is already mirrored) and hands it to a CALayer hosted by MPVReflectionView; the simulator's software renderer feeds the same layer a flipped CGImage. Off during PiP, for audio-only streams, and via the new Playback → Foldable → "Reflection Below Video" setting.
80 lines
2.3 KiB
Swift
80 lines
2.3 KiB
Swift
//
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// MPVReflectionView.swift
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// Yattee
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//
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// Hosts the backend's mirrored frame layer below the video in the iPhone
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// Duo tabletop layout, so the lower half shows a dim "reflection" of the
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// upper half like a screen standing on a glossy table.
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//
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import SwiftUI
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#if os(iOS)
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import UIKit
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/// Shows the mirrored video frames the MPV render view captures while the
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/// view is on screen. Sized to the fitted video; place it directly below the
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/// hinge line and fade it with `tabletopReflectionOverlay`.
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struct MPVReflectionView: UIViewRepresentable {
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let backend: MPVBackend
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func makeUIView(context: Context) -> ReflectionHostView {
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let view = ReflectionHostView()
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view.backend = backend
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view.attach(backend.reflectionLayer)
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backend.setReflectionEnabled(true)
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return view
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}
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func updateUIView(_ uiView: ReflectionHostView, context: Context) {
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// The backend's player view can be recreated; re-attach the current layer.
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uiView.backend = backend
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uiView.attach(backend.reflectionLayer)
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backend.setReflectionEnabled(true)
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}
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static func dismantleUIView(_ uiView: ReflectionHostView, coordinator: ()) {
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uiView.backend?.setReflectionEnabled(false)
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uiView.attach(nil)
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}
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final class ReflectionHostView: UIView {
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private weak var hostedLayer: CALayer?
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weak var backend: MPVBackend?
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override init(frame: CGRect) {
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super.init(frame: frame)
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backgroundColor = .clear
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isUserInteractionEnabled = false
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}
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required init?(coder: NSCoder) {
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super.init(coder: coder)
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}
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func attach(_ newLayer: CALayer?) {
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guard newLayer !== hostedLayer else { return }
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hostedLayer?.removeFromSuperlayer()
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hostedLayer = newLayer
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if let newLayer {
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newLayer.frame = bounds
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layer.addSublayer(newLayer)
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}
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}
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override func layoutSubviews() {
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super.layoutSubviews()
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CATransaction.begin()
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CATransaction.setDisableActions(true)
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hostedLayer?.frame = bounds
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CATransaction.commit()
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}
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deinit {
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hostedLayer?.removeFromSuperlayer()
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}
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}
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}
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#endif
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