kiding

import UIKit
import MobileCoreServices.UTCoreTypes

if #available(iOS 14.1, *) {
    let input = Bundle.main.url(forResource: "IMG_0037", withExtension: "HEIC")!
    let output = FileManager().temporaryDirectory.appendingPathComponent("IMG_0037.GAIN_MAP.BMP")
    let source = CGImageSourceCreateWithURL(input as CFURL, nil)!

    // urn:com:apple:photo:2020:aux:hdrgainmap
    let dataInfo = CGImageSourceCopyAuxiliaryDataInfoAtIndex(source, 0, kCGImageAuxiliaryDataTypeHDRGainMap)! as Dictionary

shaps80

DEPRECATED

This library is now deprecated in favour of a more complete and SwiftUI friendly TextEditor backport:

https://github.com/shaps80/SwiftUIBackports

See it in action here: https://twitter.com/shaps/status/1654972428286668800?s=20

patrickhulce

#!/bin/bash

# Non-scripted Tasks:
#   - Configure device name in Preferences > Sharing
#   - Enable Remote Login & Remote Management in Preferences > Sharing
#   - Enable automatic login/disable password after sleep in Preferences > Security & Privacy > General
#   - Disable screensaver/sleep in Preferences > Energy Saver
#   - Disable spotlight indexing of home directory
#   - Add a runner in GitHub UI to grab your token https://github.com/<org>/<repo>/settings/actions/runners/new

dabrahams

// See commentary below this gist.
import Foundation
import QuartzCore

// Implementation from https://talk.objc.io/episodes/S01E90-concurrent-map
public final class ThreadSafe<A> {
    var _value: A
    let queue = DispatchQueue(label: "ThreadSafe")
    init(_ value: A) { self._value = value }

Thomvis

//
//  ContentView.swift
//  NavigationViewTest
//
//  Created by Thomas Visser on 04/11/2019.
//  Copyright © 2019 Thomas Visser. All rights reserved.
//

import SwiftUI

AliSoftware

/*:
 This is a concept re-implementation of the @Binding and @State property wrappers from SwiftUI

 The only purpose of this code is to implement those wrappers myself
   just to understand how they work internally and why they are needed,

 ⚠️ This is not supposed to be a reference implementation nor cover all
      subtleties of the real Binding and State types.
    The only purpose of this playground is to show how re-implementing
      them myself has helped me understand the whole thing better

tclementdev

libdispatch efficiency tips

The libdispatch is one of the most misused API due to the way it was presented to us when it was introduced and for many years after that, and due to the confusing documentation and API. This page is a compilation of important things to know if you're going to use this library. Many references are available at the end of this document pointing to comments from Apple's very own libdispatch maintainer (Pierre Habouzit).

My take-aways are:

• You should create very few, long-lived, well-defined queues. These queues should be seen as execution contexts in your program (gui, background work, ...) that benefit from executing in parallel. An important thing to note is that if these queues are all active at once, you will get as many threads running. In most apps, you probably do not need to create more than 3 or 4 queues.

• Go serial first, and as you find performance bottle necks, measure why, and if concurrency helps, apply with care, always validating under system pressure. Reuse

sortofsleepy

fragment float4 capturedImageFragmentShader(ImageColorInOut in [[stage_in]],
                                            texture2d<float, access::sample> capturedImageTextureY [[ texture(kTextureIndexY) ]],
                                            texture2d<float, access::sample> capturedImageTextureCbCr [[ texture(kTextureIndexCbCr) ]]) {
    
    constexpr sampler colorSampler(mip_filter::linear,
                                   mag_filter::linear,
                                   min_filter::linear);
    
    const float4x4 ycbcrToRGBTransform = float4x4(
        float4(+1.0000f, +1.0000f, +1.0000f, +0.0000f),

codelynx

//
//	MTLTexture+Z.swift
//	ZKit
//
//	The MIT License (MIT)
//
//	Copyright (c) 2016 Electricwoods LLC, Kaz Yoshikawa.
//
//	Permission is hereby granted, free of charge, to any person obtaining a copy 
//	of this software and associated documentation files (the "Software"), to deal 

eladnava

exec > /tmp/${PROJECT_NAME}_archive.log 2>&1

UNIVERSAL_OUTPUTFOLDER=${BUILD_DIR}/${CONFIGURATION}-universal

if [ "true" == ${ALREADYINVOKED:-false} ]
then
echo "RECURSION: Detected, stopping"
else
export ALREADYINVOKED="true"