A modification to fix technical issues with Halo Infinite on PC.

ZetaLoader overrides Halo Infinite's Borderless Fullscreen/window style, if its Borderless Fullscreen implementation is enabled.
Halo Infinite uses the following styles WS_VISIBLE | WS_OVERLAPPED | WS_CLIPSIBLINGS for its Borderless Fullscreen implementation.

The window style WS_OVERLAPPED doesn't fill the screen area correctly if the display mode is below 1440x810 resulting in the window to extend its client area beyond the screen area itself.

This is simply fixed by using the following attributes:

• Window Styles - WS_VISIBLE | WS_POPUP:

  • Fixes incorrect window sizing caused by WS_OVERLAPPED.

• Extended Window Styles - WS_EX_APPWINDOW | WS_EX_NOACTIVATE:

  • Force the window to appear onto the taskbar.
  • Prevent window activation due to a mouse click or a window being minimized or closed.

• Z-Order:
  

  • HWND_TOPMOST: The game's window becomes always on top when it is in the foreground.
  • HWND_BOTTOM: The game's window drops to the bottom if it is not in the foreground.

User Specified Display Mode provides Halo Infinite with the facility to have the game's window run at any arbitrary display mode of the user's choice as long as it is valid.

Setting the game's window thread priority to THREAD_PRIORITY_HIGHEST resolves jittery mouse input when an external framerate limiter is being used by giving the game's window thread enough of a timeslice.

You can verify if this works by using a lower thread priority & setting it using the function SetThreadPriority in the source code.

Run the following script in PowerShell to install ZetaLoader for Halo Infinite's Campaign and Multiplayer:

$ProgressPreference = $ErrorActionPreference = "SilentlyContinue"
Get-Content  "$(Split-Path $(([string]((Get-ItemPropertyValue `
-Path "Registry::HKEY_CLASSES_ROOT\steam\Shell\Open\Command" `
-Name "(Default)") `
-Split "-", 2, "SimpleMatch")[0]).Trim().Trim('"')))\config\libraryfolders.vdf" | 
ForEach-Object { 
    if ($_ -like '*"path"*') {
        [string]$Path = "$(([string]$_).Trim().Trim('"path"').Trim().Trim('"').Replace("\\", "\"))\steamapps\common\Halo Infinite" 
        if (Test-Path $Path) {
            Write-Host "ZetaLoader Installation Status:" -ForegroundColor Yellow
            try {
                Invoke-RestMethod `
                    -Uri  "$((Invoke-RestMethod "https://api.github.com/repos/Aetopia/ZetaLoader/releases/latest").assets[0].browser_download_url)" `
                    -OutFile "$Path\game\dpapi.dll"
                Write-Host "`tMultiplayer: Success" -ForegroundColor Green 
            }
            catch { Write-Host "`tMultiplayer: Failed" -ForegroundColor Red }

            try {
                Copy-Item "$Path\game\dpapi.dll" "$Path\subgames\CampaignS1\dpapi.dll"
                Write-Host "`tCampaign: Success" -ForegroundColor Green 
            }
            catch { Write-Host "`tCampaign: Failed" -ForegroundColor Red }
        }
    }
}
$ProgressPreference = $ErrorActionPreference = "Continue"

1. Download the latest version of ZetaLoader from GitHub Releases.
2. Open Halo Infinite's installation directory.
3. Place the dynamic link library in the following folders:
   
   • Multiplayer: <Installation Directory>\game
   • Campaign: <Installation Directory>\subgames\CampaignS1

Simply remove any instances of dpapi.dll from Halo Infinite's installation directory.

To configure ZetaLoader, do the following:

1. Go to the following directory:

   • %LOCALAPPDATA%\HaloInfinite\Settings

2. Create a new file called ZetaLoader.ini, this is ZetaLoader's configuration file.

3. Add the following contents into the file:

   [Settings]
   Fullscreen = 0 
   Width = 0
   Height = 0
   Frequency = 0

   Key	Value
   Fullscreen	0 → Halo Infinite's Window Mode 1 → ZetaLoader's Borderless Fullscreen
   Width	Display Resolution Width
   Height	Display Resolution Height
   Frequency	Display Refresh Rate

This will make Halo Infinite run 1360x768 @ 60 Hz with ZetaLoader's Borderless Fullscreen:

[Settings]
Fullscreen = 1
Width = 1360
Height = 768
Frequency = 60

1. Install MSYS2 & UPX for optional compression.

2. Update the MSYS2 Environment until there are no pending updates using:

   pacman -Syu --noconfirm

3. Install GCC & C++/WinRT using:

   pacman -S mingw-w64-ucrt-x86_64-gcc mingw-w64-ucrt-x86_64-cppwinrt --noconfirm

4. Make sure <MSYS2 Installation Directory>\ucrt64\bin is added to the Windows PATH environment variable.

5. Run Build.cmd.