Nikhil Nigade dezinezync

This is an excerpt from our internal documentation describing an issue with drawing in NSViews on macOS Big Sur.

1️⃣ Introduction

In macOS Big Sur (probably starting with β9), Apple changed the default contents format for backing layers of NSViews. Instead of an explicit CALayerContentsFormat.RGBA8Uint value, an „Automatic“ value is now used. Even though it also resolves into „RGBA8“ in our testing, it has some serious implications as it breaks assumptions our code relies on.

I first stumbled upon this issue in this tweet by Frank. It links to a thread on Apple Forums by Mark that contains valuable information as well as ideas for workarounds. The changed behavior was also confirmed by Marcin in this tweet.

2️⃣ Impact on Diagrams

Prereq:

If you want to change the hostname, follow this guide.

sudo apt update -y && sudo apt install -y zsh git-core

Getting zsh to work in ubuntu is weird, since sh does not understand the source command. So, you do this to install zsh

	<?xml version="1.0" encoding="UTF-8"?>
	<!-- OPML generated by NetNewsWire -->
	<opml version="1.1">
	<head>
	<title>PhotographyBlogs.opml</title>
	</head>
	<body>
	<outline text="Photography" title="Photography">
	<outline text="Colin Devroe" title="Colin Devroe" description="" type="rss" version="RSS" htmlUrl="http://cdevroe.com/" xmlUrl="http://cdevroe.com/feed/"/>
	<outline text="Christopher May Fine Art Photography" title="Christopher May Fine Art Photography" description="" type="rss" version="RSS" htmlUrl="https://christophermayphotography.com/" xmlUrl="https://christophermayphotography.com/feed/"/>

	//
	// ContentView.swift
	//
	//
	// Created by Bernstein, Joel on 7/4/20.
	//

	import SwiftUI

	struct ElementModel: Identifiable

	import UIKit

	class FourColumnsContainerViewController: UIViewController {
	let outerSplitViewController = UISplitViewController(style: .tripleColumn)
	let innerSplitViewController = UISplitViewController(style: .doubleColumn)

	let primary = makeContentViewController("App")
	let secondary = makeContentViewController("Files")
	let mainContent = makeContentViewController("File Content")
	let inspector = makeContentViewController("Inspector")

	// Don't forget to prefix your category!

	#import <UIKit/UIKit.h>

	NS_ASSUME_NONNULL_BEGIN

	@interface UIWindow (PSPDFAdditions)

	#if TARGET_OS_UIKITFORMAC

	- (void)outlineViewItemDidCollapse:(NSNotification *)notification {
	VirtualHost *vh = [[[notification userInfo] valueForKey:@"NSObject"] representedObject];
	vh.isExpandedValue = NO;
	}

	- (void)outlineViewItemDidExpand:(NSNotification *)notification {
	VirtualHost *vh = [[[notification userInfo] valueForKey:@"NSObject"] representedObject];
	vh.isExpandedValue = YES;
	}
	</code></pre>

	// Douglas Hill, December 2018
	// Made for https://douglashill.co/reading-app/
	// Find the latest version of this file at https://github.com/douglashill/KeyboardKit

	import UIKit

	/// A table view that allows navigation and selection using a hardware keyboard.
	/// Only supports a single section.
	class KeyboardTableView: UITableView {
	// These properties may be set or overridden to provide discoverability titles for key commands.

	import UIKit

	class HapticHelper {
	enum HapticType {
	case impactLight
	case impactMedium
	case impactHeavy
	case selectionChange
	case notificationSuccess
	case notificationError

	import MapKit

	extension MKCoordinateRegion {

	init?(coordinates: [CLLocationCoordinate2D]) {

	// first create a region centered around the prime meridian
	let primeRegion = MKCoordinateRegion.region(for: coordinates, transform: { $0 }, inverseTransform: { $0 })

	// next create a region centered around the 180th meridian