Port AGS 3.6.0 to iOS (SDL2 backend)

[ericoporto]

The previous Allegro based AGS engine was ported to iOS, and the port is maintained in the release-3.5.1 branch. But the newer SDL2 based AGS that is on the current master branch has not been ported to iOS yet, so the README in iOS directory is not updated.

Porting to iOS should require following the porting guide in SDL2 repository:

github.com/libsdl-org/SDL/blob/main/docs/README-ios.md

Current MacOS builds use CMake, there are two possible approaches here

• Devise a way to use CMake for iOS AGS project (see github.com/libsdl-org/SDL/blob/main/docs/README-cmake.md for iOS info)
• Author Xcode projects for MacOS too (and also iOS)

Authoring the Xcode projects may require additional steps to build the dependencies (these are currently automated when using CMake build system). This was previously done by some scripts and makefiles that have not been updated.

It's recommended that the person doing the port owns at least one iOS device so they can test in real hardware.

Until this is resolved, consider the information in iOS/ directory not updated.

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Current roadmap:

• update MacOS Xcode project MacOS: update xcode project #1807
• update scripts for libraries
• update iOS Xcode project (Add ios xcode project for SDL port #2253 )
• update readme (Add ios xcode project for SDL port #2253)
• delete unused files in OSX and iOS directories (Add ios xcode project for SDL port #2253)
• additional fixes to platform and agstouch plugin

[ericoporto]

I am currently looking into updating the Xcode projects, this will take a bit of time, but thought of mentioning it here in case someone else is looking into this too.

[ericoporto]

Hey, I started this, the branch is here:
https://github.com/ericoporto/ags/tree/add-new-ios-xcode

The new readme is here: add-new-ios-xcode/iOS/README.md (I still need to explain how to get the libraries there, but it's the same process as from OSX Xcode project)

If someone would like to try things out. It's basically you run libsrc/download.sh and later you add your game files in the Resource directory in Xcode and then you build and your game should run. The code has lots of things to be cleaned up and adjusted still.

Also, the previous iOS port was actually something like a generic game player but I don't know enough on iOS permissions to do that yet. I also was having a hard time upgrading the old project, so I removed it and started from scratch.

It would be nice if someone that happens to know AGS, C++ and iOS and Xcode happens to take a look at it.

[ericoporto]

https://github.com/libsdl-org/SDL/blob/SDL2/include/SDL_filesystem.h

I was looking into SDL_GetPrefPath, and it takes an org string and an app string to make the writeable path in iOS. This is similar to android where there is an org name and an app name. For the app name, I can leverage the game name, but for the org name, It would be nice to have something in AGS for this, that was made available for all ports.

[ivan-mogilko]

For the app name, I can leverage the game name, but for the org name, It would be nice to have something in AGS for this, that was made available for all ports.

Do you mean, adding this information to the project data, or compiled game data?

[ericoporto]

Hum, I was thinking on compiled data. But maybe I spoke too soon, I think this information may be somewhere in the Xcode project (for the iOS case) and there may be some way to get it somehow - although I don't know yet how. I am still trying to understand the docs. :/

[ericoporto]

@edmundito hey, got my changes in, can you rebase your things on current master and make a PR with your improvements? It would be nice to get the changes in how to use the Xcode project you made documented in the Readme.

The current one is still the way I had made which is a single Xcode project where you add your game files to Resource folder in it and hit build.