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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.
53 lines
1.3 KiB
Swift
53 lines
1.3 KiB
Swift
//
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// MPVReflectionLayer.swift
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// Yattee
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//
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// Layer that shows a vertically mirrored copy of the rendered video frame,
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// used for the "reflection" below the video in the iPhone Duo tabletop
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// layout. The render view feeds it every presented frame.
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//
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import Foundation
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import QuartzCore
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import IOSurface
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#if canImport(UIKit)
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import UIKit
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final class MPVReflectionLayer: CALayer {
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override init() {
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super.init()
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contentsGravity = .resizeAspect
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isOpaque = false
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// Frame updates must not trigger implicit fades.
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actions = ["contents": NSNull(), "bounds": NSNull(), "position": NSNull(), "transform": NSNull()]
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}
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override init(layer: Any) {
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super.init(layer: layer)
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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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/// Show a surface whose rows are already mirrored (GL blit without Y flip).
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func display(_ surface: IOSurface) {
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contents = surface
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}
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/// Show an upright image; the layer mirrors it itself.
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func displayMirrored(_ image: CGImage) {
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if CATransform3DIsIdentity(transform) {
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transform = CATransform3DMakeScale(1, -1, 1)
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}
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contents = image
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}
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func clear() {
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contents = nil
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}
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}
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#endif
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