Edenwaith Blog

One of the most derided and cringe-worthy lines squawked by Cedric the Owl in King's Quest 5 was "Graham, watch out! A poisonous snake!" However, this was not the first time that a King's Quest game misused the term "poisonous" to describe a "venomous" snake. In King's Quest 2, a "poisonous viper" is obstructing King Graham from obtaining one of the golden keys. I thought it would be fun to hack the game and actually make the snake "poisonous".

Using AGI Studio, I opened up the 56th LOGIC file, which is the source code for the screen on the plateau with the snake. I first started by making a small change to the initial message to mirror Cedric's warning:

if (!isset(f108) &&
  !isset(f109) &&
  !isset(f110)) {
  print("Watch out! A poisonous snake!");
}

A poisonous snake would only be lethal if consumed, especially if it secreted a toxic substance which would be deadly to intrepid adventurers. Instead of letting the snake get a taste Graham, let's let Graham get in his own "licks". Since the Sierra games of the 80s were parser-driven, there is a dictionary of words that the game understands. In King's Quest 2, there are up to 255 word groups. Each word group can contain multiple terms which are similar in meaning. A person might type "get rock" or "take stone", and the game would (or should) understand that both phrases mean the same thing.

Once again, using AGI Studio, I opened up the WORDS.TOK file (where all of the tokenized words reside), and searched for the word "eat". It initially found the phrase "leather bridle", which does contain the string "eat", but not quite what I was originally looking for. Continuing the search brought up the "consuming" word group which contained the words "consume", "eat", and "taste". I then added the extra word "lick" to this group and saved the changes to WORD.TOK. Now the game will understand the word "lick".

The final piece of this playful hack is to add the code to allow Graham to lick the "poisonous" snake. At line 10, add the lines:

load.view(92);
load.view(91);

This code pre-loads the two views #92 and #91, which are Graham's choking animation and his death sprite, respectively. Next, at line 85 in the file logic.056 I added the following code.

if (said("consume","snake")) {
  if (isset(f31)) {
    print("You bend over and lick the poisonous snake.");
    set(f147);
    get.posn(o0,v67,v68);
    if (v68 < 45) {
      v67 = 0;
      v68 = 5;
      reposition(o0,v67,v68);
    }
    program.control();
    set(f92);
    set.view(o0,92);
    v94 = 3;
    cycle.time(o0,v94);
    end.of.loop(o0,f93);
  }
}

if (isset(f93)) {
  set.priority(o0,15);
  set.view(o0,91);
  set(f50);
}

There are two parts to this chunk of code. The first part checks to see if the player typed in some variant of "consume snake" such as "lick snake", "eat viper", "taste snake", etc. When this happens, the game then loads in view #92 to display Graham choking after licking the poisonous snake. Once the animation completes, flag f93 is set. After the game interpreter loops again through the script, it will come across the second part of this code snippet since the f93 flag has been set. Graham's character is then swapped from the choking animation to the death sprite (View #91). Finally flag f50 is set, which triggers the death sequence.

Happy hacking and watch out for those "poisonous" snakes!

References

• Reverse Engineering Sierra's Adventure Game Interpreter - Part 1
• Reverse Engineering Sierra's Adventure Game Interpreter - Part 2
• Reverse Engineering Sierra's Adventure Game Interpreter - Part 3

A small update for EdenList for iOS has been released which corrects a couple of UI issues for Dark Mode and verifies that the app works properly on iPad OS 13.4.

• Dark Mode and UI improvements
• Verified and tested for iPad OS 13

As with the previous iteration of macOS, Catalina has increased its security measures, which has caused complications with existing software. I have received numerous reports that Permanent Eraser is not fully functional under macOS Catalina, primarily with erasing the contents of the Trash (however, individual files which are not in the Trash can still be erased). The primary cause for this issue is that Full Disk Access is required for apps (such as Terminal or Permanent Eraser) to access the contents of the Trash. Since Permanent Eraser was not able to find the contents in the Trash, it was not erasing anything. The following steps detail how to enable Full Disk Access for Permanent Eraser so it can erase files from the Trash in Catalina:

1. Open up the System Preferences ( > System Preferences)
2. Select the Security & Privacy pane.
3. Click on the Privacy tab.
4. Click on the lock in the bottom-left corner and type in your administrator credentials to unlock it.
5. Select the Full Disk Access option in the left pane.
6. Click on the + button and add Permanent Eraser to the list of approved applications for Full Disk Access. Make sure that the checkbox to the left of Permanent Eraser is checked.
7. Close the System Preferences window

These steps will resolve the largest problem Permanent Eraser has on macOS Catalina, but an update is in the works to resolve other smaller issues Permanent Eraser has with Catalina.

During the 1980s, there was a plethora of competing computer systems (Atari, Apple ][, DOS, Macintosh, Amiga, etc.), which was instrumental in encouraging Sierra On-Line to develop their AGI and SCI game engines to support many of these systems. Since those game engines were interpreters, it was the game engine which needed to be ported, but the resources and code could remain fairly consistent, which reduced the effort to bring the games to multiple platforms.

After things shuffled out and settled down to two or three platforms during the 1990s, most games came out for DOS/Windows. Only a handful of games were ported to the Mac, and even if they were, it was often years later. In an effort to come up with a more platform neutral solution, I developed for my Master's Thesis the Platform Independent Game Engine which was based off of cross-platform frameworks like C++, OpenGL, and OpenAL. This was more of a proof of concept than a full fledged tool for game development.

Several months ago, Steven Alexander (of Infamous Quests fame) directed me to a way that shows how games created with the Adventure Game Studio can be ported to the Mac with minimal effort. (Note: Minimal to the level that it doesn't involve having to rewrite 80% of the code to support another platform.) The process to take the resources from the Windows version of an AGS game and turn it into a Mac application only takes a couple of minutes and does not require fragile third party frameworks like Wine. However, the process does not end there after copying a couple of files.

This article will detail several areas to help add the extra polish to make your game port feel like a proper Mac app by designing an appropriate app icon, configuring the Info.plist, and finally code signing and notarizing the app for security. I'll demonstrate porting the hypothetical game Knight's Quest (where you play the intrepid adventure Sir Club Cracker and roam the countryside picking up anything which hasn't been nailed down) and how to add the extra polish to make it into a "proper" Mac application.

Porting

The aforementioned link to the Adventure Game Studio Forum post details one method how to set up AGS to create a Mac version of a game. Fortunately, there is already a gameless AGS shell application which can be modified for your game to work on the Mac without having to go through a number of convoluted steps to retrofit the Adventure Game Studio to work on the Mac to develop an application. Download the pre-compiled shell Mac application which is built for version 3.4.4 of AGS (also works with AGS 3.3). For AGS 3.5, use this download, instead. This is an empty app, but we will soon populate it with the required game assets. Mac apps are bundles, essentially a folder with a collection of additional folders and files contained within. To port an existing Windows AGS game, we will need to move a couple of the Windows assets into the appropriate locations in the Mac app.

Right-click on the file AGS.app and select Show Package Contents from the context menu. This will reveal the barebones contents of the app. Inside the Contents folder is an Info.plist, a MacOS folder (which contains the AGS executable), PkgInfo, and an empty Resources folder.

Take the executable file (.exe) of your Windows game (not the winsetup.exe file that comes with some AGS games) and rename it to ac2game.dat. (Note: When using AGS 3.5+, this might need to be named game.ags, instead. If you aren't certain which name to use, launch the executable Appname.app/Contents/MacOS/AGS from the Terminal and check the output.) If you run the file command against the ac2game.dat file, you will see it is still a Windows executable file.

$ file ac2game.dat
ac2game.dat: PE32 executable (GUI) Intel 80386, for MS Windows

Next, copy the ac2game.dat, acsetup.cfg, audio.vox, music.vox, speech.vox, and any other support files (such as files ending in .dll, .tra, .000, .001, etc.) to the Resources folder. Your project may not have all of these files, but most projects will contain at least ac2game.dat, acsetup.cfg, and audio.vox. Once this is done, the package folder structure should look similar to the following screenshot.

Next rename the app bundle from AGS to the name of your game.

...and now the port is done! Really. That wasn't so difficult, was it? Except, it's not quite a polished Mac app, yet. To have the proper look and feel of a proper Mac app, we still need to add that extra shine.

App Icon

One of the first things you'll notice about an app is its icon. Like so many things in life, it's important to make a good first impression. The same applies here. Right now, the app has a generic looking icon. For so many years, icons were limited to small, pixelated blobs, but modern Mac icons come in a wide range of resolutions from a tiny 16x16 to a glorious 1024x1024.

If you have an older Mac on hand, use Icon Composer (one of the many utilities which comes along with Xcode), otherwise, use an app like Icon Slate to create a Mac icon file (icns).

If you are starting with this barebones AGS app, the next section will not apply, but this situation did come up with one app I helped port to the Mac where the app's icon was set using an old fashioned resource fork, a throwback of the Classic Mac OS days. If you need to check if there is a icon resource fork present, go to the Terminal and cd into the app bundle, then list the files contained. If you see a file that says Icon?, then there is a resource fork hidden within to represent the app's icon.

% cd SomeOtherGame.app
$ ls -la
total 2568
drwxr-xr-x@  4 chadarmstrong  staff  128 Jan  1 14:15 .
drwxr-xr-x  11 chadarmstrong  staff  352 Jan  1 20:33 ..
drwxr-xr-x@  6 chadarmstrong  staff  192 Jan  1 14:15 Contents
-rw-r--r--@  1 chadarmstrong  staff    0 Nov 26 08:26 Icon?

To remove the resource fork, either delete Icon? from the command line, or if you prefer a more visual method, right-click on the app and select the Get Info menu. In the Get Info window, click on the app icon in the top left of the window, then hit the Delete key on your keyboard.

Other resource forks might still be lurking within the app, but we will take care of those later.

Place the app icon file into the Resources folder of the app bundle. Next, we will modify the Info.plist to add the app icon and other important details.

Info.plist

The skeleton AGS app contains an Info.plist, which can be opened up in any text editor or Xcode. A couple of additions, modifications, and a deletion are necessary to properly customize for your game.

• Update the bundle identifier (CFBundleIdentifier) to be unique to your game (e.g. com.companyname.productname)
• Update the Bundle name (CFBundleName) and Display name (CFBundleDisplayName) with your game's name. The CFBundleExecutable should remain as AGS
• Update the version (CFBundleShortVersionString) and build number (CFBundleVersion)
• Add the human-readable copyright (NSHumanReadableCopyright)
• Add name of the app icon (CFBundleIconFile)
• Remove the UIStatusBarHidden key since this is for iOS and probably not necessary for a Mac port unless there is ever an iOS version.
• Add the category type: LSApplicationCategoryType. Since this is the Adventure Game Studio, let's assume that many games being made with this IDE will be adventure games, so the LSApplicationCategoryType should be set to public.app-category.adventure-games.
• The Info.plist in the skeleton AGS app bundle contains a bunch of other odd cruft (such as DTSDKBuild) which probably can be removed, but I leave it in for now since it doesn't seem to hurt anything.

Following is a subset of the Info.plist file with the necessary changes.

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
	.
	.
	.
	<key>CFBundleDisplayName</key>
	<string>Knight's Quest</string>
	<key>CFBundleName</key>
	<string>Knight's Quest</string>
	<key>CFBundleIdentifier</key>
	<string>com.edenwaith.kq</string>
	<key>CFBundleShortVersionString</key>
	<string>1.0</string>
	<key>CFBundleVersion</key>
	<string>1</string>
	<key>LSApplicationCategoryType</key>
	<string>public.app-category.adventure-games</string>
	<key>NSHumanReadableCopyright</key>
	<string>Copyright © 2020 Edenwaith. All Rights Reserved</string>
	<key>CFBundleIconFile</key>
	<string>KQ-Icon</string>
	.
	.
	.
</dict>
</plist>

Now when you launch the app, the new app icon will appear in the Dock.

Code Signing

Code signing is one of those things which has given me several new grey hairs over the years. If code signing wasn't enough, Apple has now added yet another layer of security with app notarization. Notarizing an app does require several additional steps, but it has fortunately proven to have not been too harrowing of an experience to figure out and implement. If you are going to make an app for macOS Mojave, Catalina, or later, it is a good idea to both code sign and notarize the app so macOS will not pester the player with annoying warnings about the validity and security of the app.

I have written about about code signing before, so this is not a brand new topic, but with the introduction of notarization, there is some new information to share.

With the introduction of Xcode 11, there are new types of development and distribution certificates (e.g. Apple Development, Apple Distribution), but for this example, I use the older style Developer ID Application certificate for signing the app for distribution.

Let's start by verifying that the app is not code signed:

$ codesign --verify --verbose=4 Knight\'s\ Quest.app
Knight's Quest.app: code object is not signed at all
In architecture: x86_64

$ spctl --verbose=4 --assess --type execute Knight\'s\ Quest.app
Knight's Quest.app: rejected
source=no usable signature

This looks as expected. The next step is to code sign the app bundle. In the past, we would use a command like the following:

codesign --force --sign "Developer ID Application: John Doe (12AB34567D)" MyGreatApp.app/

However, with the introduction of notarization, there is a new set of options to add to further harden the code signing process: --options runtime

codesign --force -v --sign "Developer ID Application: John Doe (12AB34567D)" --options runtime Knight\'s\ Quest.app

If everything works as hoped, you will see a successful message like this:

Knight's Quest.app/: signed app bundle with Mach-O thin (x86_64) [com.edenwaith.kq]

If the code signing was successful, skip to the next section about Notarization.

Unfortunately, it is far too easy for things to go wrong. With some apps I've helped port, there would be resource forks or other Finder info hidden somewhere in the app, so I'd see an error message like this one:

SomeOtherGame.app: resource fork, Finder information, or similar detritus not allowed

This error is due to a security hardening change that was introduced with iOS 10, macOS Sierra, watchOS 3, and tvOS 10. According to Apple:

Code signing no longer allows any file in an app bundle to have an extended attribute containing a resource fork or Finder info.

The first time I saw this error, I determined that the "offending" file was the icon file, so I used the following command:

find . -type f -name '*.icns' -exec xattr -c {} \;

In one case, the problem was because I had added a Finder tag on the app bundle. Removing the tag fixed the problem. With another instance, some other file was causing issues, but I was not able to immediately discover which was the suspect file.

To ferret out the problem, I used the xattr command to see what extended attributes were available in the app bundle.

$ xattr -lr Knight\'s\ Quest.app/
Knight's Quest.app//Contents/_CodeSignature: com.apple.quarantine: 01c1;5e0d5c84;sharingd;E82F3462-E848-4A3A-846C-C497474C0E1C
Knight's Quest.app//Contents/MacOS/AGS: com.apple.quarantine: 01c1;5e0d5c84;sharingd;E82F3462-E848-4A3A-846C-C497474C0E1C
Knight's Quest.app//Contents/MacOS: com.apple.quarantine: 01c1;5e0d5c84;sharingd;E82F3462-E848-4A3A-846C-C497474C0E1C
Knight's Quest.app//Contents/Resources/audio.vox: com.apple.quarantine: 01c1;5e2e7a68;Firefox;7587AE66-F597-423C-8787-1DAE23ECA136
Knight's Quest.app//Contents/Resources/ac2game.dat: com.apple.quarantine: 01c1;5e2e7a68;Firefox;7587AE66-F597-423C-8787-1DAE23ECA136
Knight's Quest.app//Contents/Resources/acsetup.cfg: com.apple.quarantine: 01c1;5e2e7a68;Firefox;7587AE66-F597-423C-8787-1DAE23ECA136
Knight's Quest.app//Contents/Resources: com.apple.quarantine: 01c1;5e0d5c84;sharingd;E82F3462-E848-4A3A-846C-C497474C0E1C
Knight's Quest.app//Contents/Info.plist: com.apple.lastuseddate#PS:
00000000  CD 72 0D 5E 00 00 00 00 B4 1E 64 2C 00 00 00 00  |.r.^......d,....|
00000010
Knight's Quest.app//Contents/Info.plist: com.apple.quarantine: 0181;5e0d5c84;sharingd;E82F3462-E848-4A3A-846C-C497474C0E1C
Knight's Quest.app//Contents/PkgInfo: com.apple.quarantine: 0181;5e0d5c84;sharingd;E82F3462-E848-4A3A-846C-C497474C0E1C
Knight's Quest.app//Contents: com.apple.quarantine: 01c1;5e0d5c84;sharingd;E82F3462-E848-4A3A-846C-C497474C0E1C
Knight's Quest.app/: com.apple.quarantine: 01c1;5e0d5c84;sharingd;E82F3462-E848-4A3A-846C-C497474C0E1C

To clean up the extraneous resource forks (and other detritus), use the command:

xattr -cr Knight\'s\ Quest.app/

Once the cruft has been removed, verify with xattr -lr again and then try code signing the app once more. Perform one more set of verifications to ensure that things look good.

$ codesign --verify --verbose=4 Knight\'s\ Quest.app
Knight's Quest.app: valid on disk
Knight's Quest.app: satisfies its Designated Requirement

$ spctl --verbose=4 --assess --type execute Knight\'s\ Quest.app
Knight's Quest.app: accepted
source=Developer ID

Notarization

Now on to the new stuff! The first thing you'll need to do is generate an app-specific password for this app. Log in to Manage Your Apple ID page with your Apple developer credentials. Under the Security section, tap on the Generate Password... link. In the pop up, enter in a description for the app (e.g. Knight's Quest), and then an app-specific password will be generated. The app-specific password will be a sixteen character password that will look similar to this: wcag-omwd-xzxc-jcaw . Save this password in a secure place! You will need this password for notarizing the app.

The next step will involve packaging the app to be notarized. It can be packaged as either a zip archive (zip), disk image (dmg), or an installer package (pkg). Since this is just a single app bundle, a zip file will work.

// Zip up the app
ditto -c -k --sequesterRsrc --keepParent *app KQ.zip

For the next step, if your Apple ID is only part of a single developer account, you can skip ahead. However, if your Apple ID is associated with multiple accounts (such as multiple companies), then you will need to obtain more specific information before notarizing the app. Otherwise, if you try to notarize an app and your Apple ID belongs to multiple accounts, you will see this error:

Error:: altool[7230:1692365] *** Error: Your Apple ID account is attached to other iTunes providers. You will need to specify which provider you intend to submit content to by using the -itc_provider command. Please contact us if you have questions or need help. (1627)

To get the list of providers linked to your Apple ID, use this command:

xcrun iTMSTransporter -m provider -u john.doe@edenwaith.com -p wcag-omwd-xzxc-jcaw

This command will output a bunch of cruft, but ends with:

Provider listing:
   - Long Name -     - Short Name -
1  John Doe    		JohnDoe18675309
2  Acme, Co.  		AcmeCo

In this hypothetical example, the developer John Doe has his own personal Apple developer account and also belongs to Acme's developer account, as well. For this project, John will use his personal account, so he will use the short name of JohnDoe18675309, which will be used as the ASC provider value in the following command. Again, you can omit the asc-provider option for the notarization call if your credentials are associated with only a single team.

To notarize the app, you will use the application launcher tool (altool), which can also be used for other purposes (such as uploading the app to Apple's servers). The format of notarizing is as follows:

xcrun altool --notarize-app --primary-bundle-id com.example.appname --username APPLE_DEV_EMAIL --password APP_SPECIFIC_PASSWORD --asc-provider PROVIDER_SHORT_NAME  --file AppName.zip

For our example, we filled in the blanks with the following values:

• primary-bundle-id : com.edenwaith.kq
• APPLE_DEV_EMAIL : john.doe@edenwaith.com
• APP_SPECIFIC_PASSWORD : wcag-omwd-xzxc-jcaw
• asc-provider : JohnDoe18675309
• AppName.zip : KQ.zip

xcrun altool --notarize-app --primary-bundle-id "com.edenwaith.kq" -u john.doe@edenwaith.com -p wcag-omwd-xzxc-jcaw --asc-provider JohnDoe18675309 --file KQ.zip

For a more in depth break out of what each of these options mean, refer to Davide Barranca's excellent post on this topic.

This process can take awhile, depending on how large your file is, since it needs to get uploaded to Apple's servers and be notarized. Unfortunately, this potentially long wait time comes with consequences if there is an error. One reason notarization might fail is if you need to accept Apple's terms of agreement (which may have also been updated), so you might see an error like:

/var/folders/pv/xtfd6hjn7hd8kpt70q0vwl8w0000gq/T/15A31C27-F6AF-48E8-9116-A30A7C76AD03/com.edenwaith.kq.itmsp - Error Messages:
		You must first sign the relevant contracts online. (1048)
2020-04-11 11:23:19.745 altool[22640:1119844] *** Error: You must first sign the relevant contracts online. (1048)

One approach to fix this is to log in to the Apple developer portal and check to see if new terms of service need to be reviewed. If so, agree to the terms, and wait a couple of minutes before trying to notarize again. You can also check Xcode's license agreement from the Terminal by typing in the command:

sudo xcodebuild -license

However, if everything works properly with uploading the file, you will get a message like this:

No errors uploading 'KQ.zip'.
RequestUUID = 2de2e2f9-242f-3c78-9937-1a7ef60f3007

You'll want that RequestUUID value so you can check on the notarization status to see if the package has been approved yet. After uploading your app, the notarization process typically takes anywhere from several minutes to an hour. When the process completes, you receive an email indicating the outcome. Additionally, you can use the following command to check the status of the notarization process:

$ xcrun altool --notarization-info 2de2e2f9-242f-3c78-9937-1a7ef60f3007 -u john.doe@edenwaith.com -p wcag-omwd-xzxc-jcaw
No errors getting notarization info.

          Date: 2020-01-04 22:44:42 +0000
          Hash: adf86725dec3ab7c26be17178e07efaf3b2806f743fefd0dd1059f68dcf45398
    LogFileURL: https://osxapps-ssl.itunes.apple.com/itunes-assets/Enigma123/v4/a5/15/64/2d...
   RequestUUID: 2de2e2f9-242f-3c78-9937-1a7ef60f3007
        Status: success
   Status Code: 0
Status Message: Package Approved

Once the package has been approved, we can move on to the stapling the ticket to the app.

xcrun altool --notarize-app --primary-bundle-id "com.edenwaith.kq" -u john.doe@edenwaith.com -p wcag-omwd-xzxc-jcaw --asc-provider JohnDoe18675309 --file KQ.zip

23 July 2022 Update

altool has been deprecated and it is now recommended to use the new tool notarytool, instead. notarytool is faster and has a --wait option so the tool will only complete once the notarization is finished so one does not need to keep polling the servers to determine when the process is complete.

The new notarytool command which was introduced in Xcode 13:

xcrun notarytool submit ./KQ4R.zip --wait --apple-id john.doe@edenwaith.com --password wcag-omwd-xzxc-jcaw --team-id ABCD123456

This command has some similarities to altool, but one difference is that instead of using the --asc-provider option, use the --team-id instead. You can find the Team ID by logging in to your account at https://developer.apple.com and going to the Membership section.

Stapler

At this point, the app has been validated and notarized, so if an app launches, macOS will check with the servers and verify that the app has been properly notarized. However, if the computer is not online, then it cannot perform this step, so it is useful to staple the ticket to the app for offline usage.

xcrun stapler staple -v KQ.app

Once again, a ton of text will scroll across the Terminal. If it works, the last line should read: "The staple and validate action worked!"

For sanity's sake, validate that stapling worked:

stapler validate Knight\'s\ Quest.app
Process: Knight's Quest.app
The validate action worked!

However, if the stapling hasn't been completed, there will be an error like this:

$ stapler validate Knight\'s\ Quest.app/
Processing: Knight's Quest.app
Knight's Quest.app does not have a ticket stapled to it.

For a final verification, use spctl to verify that the app has been properly signed and notarized:

$ spctl -a -v Knight\'s\ Quest.app
Knight's Quest.app: accepted
source=Notarized Developer ID

Notice that this check varies slightly from when we first did this check before the notarization — the source now says Notarized Developer ID.

Final Packaging

Now that the game has been ported, code signed, and notarized, it is time to package it up for distribution. There are a variety of ways to do so, whether via an installer, a disk image, or a zip archive. If you are distributing the game via download from your website, you'll probably want to bundle the game and any other extras (such as README files, game manuals, etc.) into a single containing folder. If you are going to upload the game to Steam, then you may not want an enclosing folder.

To be a good internet citizen, make sure when the zip archive is created, that any Mac-specific files are removed, such as the .DS_Store file and __MACOSX, which stores excess metadata and resource forks.

zip -r KQ.zip . -x ".*" -x "__MACOSX"

This example zips up everything in the current directory, but excludes any dot files and any unwanted metadata. With the game packaged up, it's ready to go!

Building the AGS Mac App Bundle

For the first couple of games I ported to the Mac, they were using an older version of AGS, generally version 3.3 or 3.4. I used the Mac app shell someone else had built, but I discovered this didn't work properly with newer games developed with AGS 3.5. I've encountered a few hiccups with trying to get games developed with AGS 3.5 to work properly on the Mac. The first issue I encountered was that some colors were inverted, but it appears that this was due to an incorrect library being used. Another issue I encountered was when I used a debug build of the AGS app shell, it would write out log statements to the allegro.log file that is contained within the app bundle's Resources folder. The problem with this is if the app has been code signed, the contents within the app cannot be modified, otherwise the app appears to be corrupted. I solved this problem by building the Mac app bundle myself by running the following script in the same folder that contains the CMakeLists.txt file (e.g. the ags-release-3.5.0 folder).

Once this finishes building, it will create the app bundle AGS.app in the build_release folder.

Ported Games

It has been a pleasure and joy to help bring a number of adventure games to the Mac. Below is the list of AGS games I've helped port. I highly recommend that if you enjoy adventure games, give them a try! I hope that this extensive tutorial has been useful in learning how to port games developed with the Adventure Game Studio to the Mac, in addition to learning how to code sign and notarize a Mac application. If you would like assistance in porting, contact me via e-mail or Twitter.

• Space Quest 2 VGA by Infamous Adventures
• King's Quest 3 VGA by Infamous Adventures
• Order of the Thorne - The King's Challenge by Infamous Quests
• Quest for Infamy by Infamous Quests
• Feria D'Arles by Tom Simpson
• The Crimson Diamond by Julia Minamata
• Stair Quest by No More For Today Productions
• Stair Quest Winter 2023 by No More For Today Productions
• Pet the Dog? by The Retro Room
• King's Quest IV Retold by DrSlash
• Heroine's Quest by Crystal Shard

Resources

• Adventure Game Studio
• AGS engine Mac OS X port
• Notarizing macOS Software Before Distribution
• Customizing The Notarization Workflow
• Your Apps and the Future of macOS Security
• Apple ID - Create Per App-Specific Passwords
• Using app-specific passwords
• How to Notarize Your Software on macOS
• App Notarization: A Quick Primer
• Apple Ramps Up Fight against Malware with Notarization, Stapling, and Hardening
• Replacing Application Loader with altool
• Notarization Provider IDs
• Selecting iTunes Provider for Notarization
• Technical Q&A QA1940 Code signing fails with error 'resource fork, Finder information, or similar detritus not allowed'
• Signing and Notarizing macOS Apps for Gatekeeper
• Codesigning and notarizing your LC standalone for distribution outside the Mac Appstore
• Signing and Notarizing for Catalina
• Dev Journal — Automate notarizing macOS apps
• Mac zip compress without __MACOSX folder?
• Compress without .DS_Store and __MACOSX
• Notarizing installers for macOS Catalina
• Notarize a Command Line Tool
• Building and delivering command tools for Catalina

Back in 2003, I was playing the Macintosh version of Quest For Glory 1 (VGA), and I came across this interesting Easter egg which I've never seen in the PC version of the game. The standard Easter egg from the VGA version of this game is when Earl the dinosaur comes walking by. Instead, the Macintosh version of the game has a familiar set of characters making an appearance with a rabbit moving through the bushes, followed by a hunter who has difficulty in pronouncing the letter 'R'.

28 June 2022 Update: Chris Benshoof wrote up an even more in depth post about this particular Easter egg, with a bonus! Apparently, this Easter egg is interactive. If you have the Flame Dart spell, you can cast it at Elmer and set his hat on fire. Very neat.

Even though the scientific calculator EdenMath is the first Mac application I wrote (18 years ago!), its development has come in random fits and spurts. This year was one of those random, yet unplanned, events where I did manage to do some work on this ancient app to keep it running on the latest version of macOS. Perhaps it was seeing how many apps I still had on my computer that were not compatible with macOS Catalina which helped prompt a quick update of EdenMath so it can gasp out a couple more years before EdenMath 1.3 is finally released.

It's been six years since the previous release, so there has been some room to add a little extra shine and other improvements for this app, including:

• 64-bit version for macOS Catalina compatibility
• Code signed and notarized for macOS Mojave and later
• New and updated icons

Download EdenMath 1.2.2 for Intel and PowerPC Macs, compatible from Mac OS X 10.5 Leopard through macOS Catalina. The source code is available on GitHub.

As I've admitted in the past, I have a bad habit of having a large number of tabs open in my web browser. Bad enough that I've written scripts to count how many tabs are open in either Safari or Chrome.

While these scripts are useful to let me know how egregious my tab opening habits have been recently, they do not help in curating the massive number of tabs to a more manageable amount. So I wrote another script to help keep the tab population under control.

At my job at Acme Co. (the fine purveyor of generic products used everywhere and by everyone, including wily coyotes), we make use of Atlassian products such as JIRA and Confluence for tracking tickets and documentation. I often find that I have far too many tabs open, and after my session has expired, I am forced to relogin to access these pages anyway, so I might as well close them. The following script CloseAcmeTabs.scpt is the example I use to iterate through all of Chrome's open tabs, find any open JIRA or Confluence tabs, and then close these tabs. To make use of this script for your own uses, change acme.com to the appropriate domain name.

To simplify running this script, I added an alias into my .bash_profile file:

Once the file has been updated, refresh the bash shell environment: source ~/.bash_profile

Now to run the script, type closetabs in the Terminal, and the AppleScript will start, close any JIRA and Confluence web pages, and then print out the total of tabs which were closed.

While this does not entirely curtail my habit of opening hundreds of tabs, it does help automate at least one process by removing the tabs I know will have expired by the next day, so this script does help by doing some regular browser maintenance when I call for it.

This past year proved to be a shift away from the standard set of Mac and iOS projects, but a return to what started my path to programming: games. I began my exploratory research into reverse engineering Sierra On-Line's AGI game engine last year, which led to me porting Qt AGI Studio to the Mac, which was then used to create King's Quest 1 - Redux. Working on these projects has rekindled my love of not only playing classic adventure games, but having a chance to work on them. This is something I plan on continuing in some form or another over the next year.

On the more traditional front, two versions of EdenList for iOS were released this year. With the advent of Catalyst, I might even develop a new version of the Mac version of EdenList — an app which hasn't been updated since the iOS version was first released in 2010. Or, then again, maybe I won't. These are merely ideas at this time which I'm contemplating.

2019 was a rare year in which Permanent Eraser did not see an update, since I had originally planned on rebuilding the app from the ground up for the next major version. Unfortunately, the app is having issues with macOS Catalina, so I am in the process of working on Permanent Eraser 2.9 to fix these issues with the latest version of macOS.

macOS Catalina rang the death knell for older 32-bit apps and frameworks, which means 33 RPM will no longer work on the latest version of macOS. I am still contemplating on whether or not to rewrite 33 RPM to be able to work on Catalina, and perhaps even iOS, but there are other projects which are taking precedence at this point.

One of these other projects includes something I've been working on for over 23 years — a novel. Before I got into computer programming, I was into creative writing. I wrote short stories, poems, and even completed a full length novel. The work I am currently working on is finally nearing the completion of its first draft. I have surpassed 100,000 words, which is an average length of a novel, and now I am in the process of finishing off putting the final bits and pieces to form the initial draft. If this was software, I would consider it the alpha build. The basic form is there, but it still requires the extra polish and fixes before it is ready.

Looking to 2020, I plan on completing the first draft of my novel, Permanent Eraser 2.9, and several game-related projects. Aside from those, time will always tell.

Inbox zero. A lofty goal, but often difficult to regularly obtain, especially when new e-mail is continually rolling in.

I've had some jobs where the e-mail was minimal, and most of the day-to-day communication was reserved for daily stand ups and over instant messenger. In such cases, e-mail is not an issue when the signal-to-noise ratio is high since nearly all of the e-mail that was delivered was actually applicable to me.

But then there are jobs where one is deluged under a mountain of electronic messages covering notifications and alerts, on top of regular correspondence. Setting up rules in your e-mail client can help direct the flow, but it still doesn't cut down on the amount of messages, plus there is the daunting task of actually reviewing the messages.

Let's be honest — we aren't always going to read every single e-mail, especially if a majority of them do not require a response or are not directly applicable. To help mitigate the unnecessary amount of message I need to review, I have written an AppleScript which periodically scans through Microsoft Outlook and marks any old messages as read.

Setup

Script Editor (/Applications/Utilities/Script Editor.app) is the primary tool for writing, compiling, and running AppleScripts. However, it can also be useful to read and edit scripts from another text editor, such as the venerable BBEdit. I was surprised to see that BBEdit, a longtime Mac application, did not natively support AppleScript syntax highlighting. Fortunately, BBEdit (and its now-retired sister app TextWrangler) supports Codeless Language Modules to be able to provide syntax highlighting for additional languages. I went out and found an applicable AppleScript language module and installed the AppleScript.plist file in ~/Library/Application Support/BBEdit/Language Modules/. This was more for the purpose of reviewing and formatting code in BBEdit, but the brunt of the work to compile and test the script was done in Script Editor.

The AppleScript

The following script iterates through several Outlook subfolders and marks any old unread messages as read. The cutoff argument in the markUnreadMessages method is used as a threshold to determine how far back to mark old messages as read. This will keep more recent messages in an unread state to give more time to review the messages. For messages which do not pertain to me, I have those e-mails sent to the Other folder, and all of those messages are immediately marked as read when the script is run. Any e-mails which go directly to my primary Inbox are not touched by this script since I want to personally check such e-mails. For your own variant of this script, add the necessary mailbox folders and decide how much of a time threshold you need.

Launchd

Since e-mail needs continual maintenance, a good approach to ensure that this script is called at regular intervals is to use launchd on the Mac. To set up a launchd job, we create a property list file for the launch agent.

Writing: To set up a launch agent, a property list is created and then placed within the ~/Library/LaunchAgents/ directory. The following launch agent is fairly small and straightforward which calls the Mark Unread Emails AppleScript everyday at 9:00 a.m. Refer to the launchd website for further details on how to configure a launch agent for launchd. For this example, the property list is named local.markunreademails.plist.

Copying: Once the property list has been written, copy the file to ~/Library/LaunchAgents/local.markunreademails.plist.

Relaunching: Next relaunch launchd from the Terminal: launchctl load -w ~/Library/LaunchAgents/local.markunreademails.plist

Starting: To start and/or test the launch agent, run: launchctl start ~/Library/LaunchAgents/local.markunreademails

References

• Automated Inbox Cleansing with Outlook 2016 and AppleScript
• AppleScript for Outlook Mark Messages as Read
• AppleScript Move Outlook Email to Sub Folder
• Mark All Subfolders as Read.scpt
• Outlook Cleanup Script
• BBEdit Applescript Codeless Language Module
• Automating Periodic Scripts With Launchd
• A launchd Tutorial

Last month, EdenList 2.1.0 for iOS was released, featuring new printing capabilities, Dark Mode for iOS 13, and improved accessibility with Dynamic Type support.

Printing

After nearly a decade, I finally purchased a new printer, which has some nice features such as AirPrint and a duplexer. AirPrint in particular is a very welcome addition, especially with the proliferation of mobile devices over the past dozen years. This was key for me to finally take a look at adding printing support to the iOS version of EdenList.

I was initially surprised that printing wasn't already a feature supported by default on iOS, even if in some rudimentary form. It seemed like it should have been a relatively simple concept, but ended up being far more complicated than I had originally assumed. It seems like printing something as commonplace as a list would be a simple matter, but it is not. The frameworks make it relatively simple to print things like images, text, HTML, or a PDF, but if you want more customized printing, then you will have to handle it yourself.

After considering several options on how to best print a standard table view of data, I decided to go with constructing an HTML page from the data and printing the generated web page. The standard UITableView only displays a subset of the total data, so one cannot just take the visible portion of the screen and print it, since there might be a lot of unseen information. That is why I went the route of using an HTML template and used that to display what to print.

The following is a code snippet from EdenList which shows taking an HTML template and forming a web page with the list's data. In this example, the print functionality is part of the Share sheet, instead of an isolated function.

		
let fileTitle = self.title ?? ""
let fileURL = NSURL(fileURLWithPath: self.filePath)

var htmlContent = ""

// Retrieve the print_template.html file and put into a string
let templatePath = Bundle.main.path(forResource: "print_template", ofType: "html")

do {
	htmlContent = try String(contentsOfFile:templatePath!, encoding: String.Encoding.utf8)
	// Swap out the title with the name of the file to print
	htmlContent = htmlContent.replacingOccurrences(of: "__LIST_TITLE__", with: fileTitle)
	
	var itemsHTML = ""
	
	// Loop through the records and construct an HTML table for printing
	for item in self.records {
		let checkedOption: String = item.itemChecked ? "checked " : ""
		let itemTemplate = """
			<tr>
				<td><input type="checkbox" \(checkedOption)/></td>
				<td>
					<h4>\(item.itemTitle)</h4>
					<h5>\(item.itemNotes)</h4>
				</td>
			</tr>
		"""
		
		itemsHTML += itemTemplate
	}
	
	htmlContent = htmlContent.replacingOccurrences(of: "__LIST_ITEMS__", with: itemsHTML)
	
} catch _ as NSError {
	
}

let printInfo = UIPrintInfo(dictionary:nil)
printInfo.outputType = UIPrintInfo.OutputType.general
printInfo.jobName = fileTitle
printInfo.orientation = .portrait
printInfo.duplex = .longEdge
		
let formatter = UIMarkupTextPrintFormatter(markupText: htmlContent)
formatter.perPageContentInsets = UIEdgeInsets(top: 36, left: 36, bottom: 36, right: 36)

let excludedTypes:[UIActivity.ActivityType] = [.postToFacebook, .postToTwitter, .postToVimeo, .postToWeibo, .postToFlickr, .addToReadingList, .assignToContact, .saveToCameraRoll]
let shareVC = UIActivityViewController(activityItems: [fileTitle, fileURL, printInfo, formatter], applicationActivities: nil)

shareVC.excludedActivityTypes = excludedTypes

Dark Mode

One of the landmark features in iOS 13 is the new Dark Mode appearance. For apps which stick with the stock UI components, adopting Dark Mode is fairly straightforward. There were a couple of places where I needed to check for iOS 13, but I did not need to add too many specific changes to get EdenList to look presentable in iOS 13. I could have also set up Dark Mode-specific icons, but felt that the current images work pretty well with both light and dark appearances.

if #available(iOS 13.0, *) {
	messageLabel.textColor = UIColor.systemGray
} else {
	// Fallback on earlier versions
	messageLabel.textColor = UIColor.darkGray
}

However, if your app isn't set up to support Dark Mode at this time, especially if you have a more distinct or customized design, then you will want to ensure that you are using specified colors for your various elements, and not using Default colors.

Dynamic Type

I have been learning a lot about WCAG and accessibility standards lately, which led me to properly implement Dynamic Type throughout the app. To better support a range of text sizes, EdenList now better supports Dynamic Type. This is reminiscent of the various styles (paragraph, header, caption, etc.) that a word processor uses, so it uses predefined terms instead of explicit font sizes. By avoiding explicit font sizes, it allows iOS to resize the text dependent upon the user's settings.

To alter the size of text in iOS, go to Settings > Display & Brightness > Text Size and adjust the slider.