GlowGetter

Add customizable glow effects to your SwiftUI views.

Overview

GlowGetter provides two implementations for adding glow effects:

Target	API	App Store Safe	Method
GlowGetter	Public	Yes	Metal-rendered overlay
GlowGetterPrivate	Private	No	CAFilter EDR (true HDR brightness)

Installation

dependencies: [
    .package(url: "https://github.com/Aeastr/GlowGetter.git", from: "2.0.0")
]

Add the target you need:

.target(
    name: "YourTarget",
    dependencies: [
        .product(name: "GlowGetter", package: "GlowGetter"),
        // OR
        .product(name: "GlowGetterPrivate", package: "GlowGetter")
    ]
)

Usage

GlowGetter (Public API)

Metal-powered overlay effect. Safe for App Store.

import GlowGetter

// Basic glow
Color.orange
    .glow(0.8)

// With shape clipping
Color.orange
    .clipShape(Circle())
    .glow(0.8, Circle())

GlowGetterPrivate (Private API)

Warning

Uses private CAFilter APIs. May be rejected by App Store review, may break in future iOS updates. We are not responsible for any consequences of using this in your applications. Use at your own risk.

True HDR brightness using the edrGainMultiply filter. Only visible on HDR-capable displays.

import GlowGetterPrivate

// EDR glow (values typically 2.0-10.0)
Color.orange
    .glowEDR(4.0)

To preview: Use My Mac | Mac Catalyst if your Mac supports HDR—simulators won't show the effect.

How It Works

GlowGetter (Public)

Uses a Metal layer to render a glow overlay blended with the underlying view. The overlay is applied via GlowRenderView wrapped in the .glow() modifier.

GlowGetterPrivate (Private)

Wraps the view in a UIViewRepresentable and applies CAFilter's edrGainMultiply to the layer. Private API strings are obfuscated at compile-time using Obfuscate.

Acknowledgments

GlowGetter (Public): Thanks to Jordi Bruin and Ben Harraway for their insights on the Metal rendering. Adapts code built for Vivid.

GlowGetterPrivate: Thanks to Seb Vidal for the CAFilter implementation.

Contributing

Contributions welcome. See the Contributing Guide for details.

License

MIT. See LICENSE for details.