diff --git a/AffinityPluginLoader.sln b/AffinityPluginLoader.sln
index fc6aa76..903b041 100644
--- a/AffinityPluginLoader.sln
+++ b/AffinityPluginLoader.sln
@@ -9,6 +9,8 @@ Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "AffinityPluginLoader", "Aff
EndProject
Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "WineFix", "WineFix\WineFix.csproj", "{A9134DEC-BC99-468E-ADE6-8DAC9883F11E}"
EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "LoginFix", "LoginFix\LoginFix.csproj", "{BC45F218-FDC1-49F5-8B6E-E3151E1BE134}"
+EndProject
Global
GlobalSection(SolutionConfigurationPlatforms) = preSolution
Debug|x64 = Debug|x64
@@ -27,6 +29,10 @@ Global
{A9134DEC-BC99-468E-ADE6-8DAC9883F11E}.Debug|x64.Build.0 = Debug|x64
{A9134DEC-BC99-468E-ADE6-8DAC9883F11E}.Release|x64.ActiveCfg = Release|x64
{A9134DEC-BC99-468E-ADE6-8DAC9883F11E}.Release|x64.Build.0 = Release|x64
+ {BC45F218-FDC1-49F5-8B6E-E3151E1BE134}.Debug|x64.ActiveCfg = Debug|x64
+ {BC45F218-FDC1-49F5-8B6E-E3151E1BE134}.Debug|x64.Build.0 = Debug|x64
+ {BC45F218-FDC1-49F5-8B6E-E3151E1BE134}.Release|x64.ActiveCfg = Release|x64
+ {BC45F218-FDC1-49F5-8B6E-E3151E1BE134}.Release|x64.Build.0 = Release|x64
EndGlobalSection
GlobalSection(SolutionProperties) = preSolution
HideSolutionNode = FALSE
diff --git a/LoginFix/LICENSE b/LoginFix/LICENSE
new file mode 100644
index 0000000..9efa6fb
--- /dev/null
+++ b/LoginFix/LICENSE
@@ -0,0 +1,338 @@
+ GNU GENERAL PUBLIC LICENSE
+ Version 2, June 1991
+
+ Copyright (C) 1989, 1991 Free Software Foundation, Inc.,
+
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+ Preamble
+
+ The licenses for most software are designed to take away your
+freedom to share and change it. By contrast, the GNU General Public
+License is intended to guarantee your freedom to share and change free
+software--to make sure the software is free for all its users. This
+General Public License applies to most of the Free Software
+Foundation's software and to any other program whose authors commit to
+using it. (Some other Free Software Foundation software is covered by
+the GNU Lesser General Public License instead.) You can apply it to
+your programs, too.
+
+ When we speak of free software, we are referring to freedom, not
+price. Our General Public Licenses are designed to make sure that you
+have the freedom to distribute copies of free software (and charge for
+this service if you wish), that you receive source code or can get it
+if you want it, that you can change the software or use pieces of it
+in new free programs; and that you know you can do these things.
+
+ To protect your rights, we need to make restrictions that forbid
+anyone to deny you these rights or to ask you to surrender the rights.
+These restrictions translate to certain responsibilities for you if you
+distribute copies of the software, or if you modify it.
+
+ For example, if you distribute copies of such a program, whether
+gratis or for a fee, you must give the recipients all the rights that
+you have. You must make sure that they, too, receive or can get the
+source code. And you must show them these terms so they know their
+rights.
+
+ We protect your rights with two steps: (1) copyright the software, and
+(2) offer you this license which gives you legal permission to copy,
+distribute and/or modify the software.
+
+ Also, for each author's protection and ours, we want to make certain
+that everyone understands that there is no warranty for this free
+software. If the software is modified by someone else and passed on, we
+want its recipients to know that what they have is not the original, so
+that any problems introduced by others will not reflect on the original
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+
+ Finally, any free program is threatened constantly by software
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+patent must be licensed for everyone's free use or not licensed at all.
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+
+ GNU GENERAL PUBLIC LICENSE
+ TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
+
+ 0. This License applies to any program or other work which contains
+a notice placed by the copyright holder saying it may be distributed
+under the terms of this General Public License. The "Program", below,
+refers to any such program or work, and a "work based on the Program"
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+that is to say, a work containing the Program or a portion of it,
+either verbatim or with modifications and/or translated into another
+language. (Hereinafter, translation is included without limitation in
+the term "modification".) Each licensee is addressed as "you".
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+Activities other than copying, distribution and modification are not
+covered by this License; they are outside its scope. The act of
+running the Program is not restricted, and the output from the Program
+is covered only if its contents constitute a work based on the
+Program (independent of having been made by running the Program).
+Whether that is true depends on what the Program does.
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+ 1. You may copy and distribute verbatim copies of the Program's
+source code as you receive it, in any medium, provided that you
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+You may charge a fee for the physical act of transferring a copy, and
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+ 2. You may modify your copy or copies of the Program or any portion
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+These requirements apply to the modified work as a whole. If
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+In addition, mere aggregation of another work not based on the Program
+with the Program (or with a work based on the Program) on a volume of
+a storage or distribution medium does not bring the other work under
+the scope of this License.
+
+ 3. You may copy and distribute the Program (or a work based on it,
+under Section 2) in object code or executable form under the terms of
+Sections 1 and 2 above provided that you also do one of the following:
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+ 7. If, as a consequence of a court judgment or allegation of patent
+infringement or for any other reason (not limited to patent issues),
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+If any portion of this section is held invalid or unenforceable under
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+This section is intended to make thoroughly clear what is believed to
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+ 8. If the distribution and/or use of the Program is restricted in
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+ 9. The Free Software Foundation may publish revised and/or new versions
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+either of that version or of any later version published by the Free
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+ 10. If you wish to incorporate parts of the Program into other free
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+
+ NO WARRANTY
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+ 11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
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+ 12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
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+TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY
+YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
+PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
+POSSIBILITY OF SUCH DAMAGES.
+
+ END OF TERMS AND CONDITIONS
+
+ How to Apply These Terms to Your New Programs
+
+ If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+ To do so, attach the following notices to the program. It is safest
+to attach them to the start of each source file to most effectively
+convey the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+
+ Copyright (C)
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License along
+ with this program; if not, see .
+
+Also add information on how to contact you by electronic and paper mail.
+
+If the program is interactive, make it output a short notice like this
+when it starts in an interactive mode:
+
+ Gnomovision version 69, Copyright (C) year name of author
+ Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+ This is free software, and you are welcome to redistribute it
+ under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License. Of course, the commands you use may
+be called something other than `show w' and `show c'; they could even be
+mouse-clicks or menu items--whatever suits your program.
+
+You should also get your employer (if you work as a programmer) or your
+school, if any, to sign a "copyright disclaimer" for the program, if
+necessary. Here is a sample; alter the names:
+
+ Yoyodyne, Inc., hereby disclaims all copyright interest in the program
+ `Gnomovision' (which makes passes at compilers) written by James Hacker.
+
+ , 1 April 1989
+ Moe Ghoul, President of Vice
+
+This General Public License does not permit incorporating your program into
+proprietary programs. If your program is a subroutine library, you may
+consider it more useful to permit linking proprietary applications with the
+library. If this is what you want to do, use the GNU Lesser General
+Public License instead of this License.
diff --git a/LoginFix/LoginFix.csproj b/LoginFix/LoginFix.csproj
new file mode 100644
index 0000000..a997ba9
--- /dev/null
+++ b/LoginFix/LoginFix.csproj
@@ -0,0 +1,33 @@
+
+
+
+ net48
+ latest
+ win-x64
+ x64
+ x64
+
+
+ LoginFix
+ Plugin to fix the Canva sign-in crash under Wine
+ 0.1.0
+
+ false
+
+
+
+
+
+
+
+
+
+
+
+ {0B4B2B01-D160-40EE-A9AC-9594470DDBC3}
+ AffinityPluginLoader
+ False
+
+
+
+
diff --git a/LoginFix/LoginFixPlugin.cs b/LoginFix/LoginFixPlugin.cs
new file mode 100644
index 0000000..3c06448
--- /dev/null
+++ b/LoginFix/LoginFixPlugin.cs
@@ -0,0 +1,25 @@
+using HarmonyLib;
+using AffinityPluginLoader;
+using AffinityPluginLoader.Settings;
+
+namespace LoginFix
+{
+ ///
+ /// Works around a Wine WinRT gap that crashes the Canva sign-in callback.
+ ///
+ public class LoginFixPlugin : AffinityPlugin
+ {
+ public const string PluginId = "loginfix";
+
+ public override PluginSettingsDefinition DefineSettings()
+ {
+ return new PluginSettingsDefinition(PluginId);
+ }
+
+ public override void OnPatch(Harmony harmony, IPluginContext context)
+ {
+ context.Patch("ProcessCommandLineArguments fix",
+ h => Patches.ProcessCommandLineArgumentsPatch.ApplyPatches(h));
+ }
+ }
+}
diff --git a/LoginFix/Patches/ProcessCommandLineArgumentsPatch.cs b/LoginFix/Patches/ProcessCommandLineArgumentsPatch.cs
new file mode 100644
index 0000000..b2a8b1a
--- /dev/null
+++ b/LoginFix/Patches/ProcessCommandLineArgumentsPatch.cs
@@ -0,0 +1,254 @@
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.IO.Pipes;
+using System.Linq;
+using System.Reflection;
+using System.Threading;
+using HarmonyLib;
+using AffinityPluginLoader.Core;
+
+namespace LoginFix.Patches
+{
+ ///
+ /// Serif.Affinity.Application.ProcessCommandLineArguments references
+ /// Windows.ApplicationModel.DataTransfer.SharedStorageAccessManager (only reached for
+ /// "affinity-open-file:" arguments). Wine has no WinRT implementation for that type, and the
+ /// CLR resolves every type referenced in a method body when it JITs the method - so any call
+ /// into ProcessCommandLineArguments throws System.TypeLoadException, including the unrelated
+ /// "affinity://" OAuth callback path the sign-in flow depends on.
+ ///
+ /// Harmony itself can't patch ProcessCommandLineArguments directly either: patching requires
+ /// decompiling the target method's IL (even for a plain prefix, to build the merged
+ /// dispatcher), which means resolving every operand in its body - including the poisoned
+ /// SharedStorageAccessManager call - and that resolution throws the same way the JIT does.
+ ///
+ /// Both of ProcessCommandLineArguments' callers only reference it by signature (safe to
+ /// resolve), not by body, so patching *them* instead works: ProcessArguments() handles the
+ /// app's own startup command line, and SingleInstanceThread() receives arguments forwarded
+ /// over a named pipe by a second launched instance (this is the path the Canva sign-in
+ /// callback actually takes). Both patches fully replace their target with a safe
+ /// reimplementation that never touches the real ProcessCommandLineArguments.
+ ///
+ public static class ProcessCommandLineArgumentsPatch
+ {
+ static readonly HashSet KnownFlags = new HashSet
+ {
+ "--gpu-telemetry", "--no-dwm-warning", "--hw-ui", "--no-hw-ui", "--no-ocl",
+ "--click-through", "--no-click-through", "--input-logging", "--printmode1",
+ "--disable-cltest", "--disable-font-preview-cache",
+ "--disable-parallel-font-enumeration", "--font-cache-logging",
+ "--full-crash-dumps", "--disable-wintab", "--legacy-wintab",
+ };
+
+ static Type _applicationType;
+
+ public static void ApplyPatches(Harmony harmony)
+ {
+ Logger.Info("Applying command-line argument patches (Wine SharedStorageAccessManager fix)...");
+
+ var serifAssembly = AppDomain.CurrentDomain.GetAssemblies()
+ .FirstOrDefault(a => a.GetName().Name == "Serif.Affinity");
+ if (serifAssembly == null)
+ {
+ Logger.Error("Serif.Affinity assembly not found");
+ return;
+ }
+
+ _applicationType = serifAssembly.GetType("Serif.Affinity.Application");
+ if (_applicationType == null)
+ {
+ Logger.Error("Serif.Affinity.Application type not found");
+ return;
+ }
+
+ var processArguments = AccessTools.Method(_applicationType, "ProcessArguments", Type.EmptyTypes);
+ if (processArguments == null)
+ {
+ Logger.Error("ProcessArguments() not found");
+ }
+ else
+ {
+ harmony.Patch(processArguments,
+ prefix: new HarmonyMethod(AccessTools.Method(typeof(ProcessCommandLineArgumentsPatch), nameof(ProcessArgumentsPrefix))));
+ Logger.Info("Patched ProcessArguments (startup command line)");
+ }
+
+ var singleInstanceThread = AccessTools.Method(_applicationType, "SingleInstanceThread", Type.EmptyTypes);
+ if (singleInstanceThread == null)
+ {
+ Logger.Error("SingleInstanceThread() not found");
+ }
+ else
+ {
+ harmony.Patch(singleInstanceThread,
+ prefix: new HarmonyMethod(AccessTools.Method(typeof(ProcessCommandLineArgumentsPatch), nameof(SingleInstanceThreadPrefix))));
+ Logger.Info("Patched SingleInstanceThread (activation via named pipe - the sign-in callback path)");
+ }
+ }
+
+ // Replaces Application.ProcessArguments(). Mirrors the original's fallback chain
+ // (live command line, then per-user arguments.cfg, then per-machine arguments.cfg)
+ // but routes everything through SafeProcessCommandLineArguments instead of the
+ // real (poisoned) ProcessCommandLineArguments.
+ static bool ProcessArgumentsPrefix(object __instance)
+ {
+ try
+ {
+ var setCommandLineArguments = AccessTools.Method(_applicationType, "SetCommandLineArguments", new[] { typeof(string[]) });
+ setCommandLineArguments?.Invoke(__instance, new object[] { Environment.GetCommandLineArgs() });
+
+ SafeProcessCommandLineArguments(__instance, Environment.GetCommandLineArgs().Skip(1));
+
+ bool handledFromFile = false;
+ var appDataPathForCurrentUser = (string)AccessTools.Property(_applicationType.BaseType, "AppDataPathForCurrentUser")?.GetValue(__instance);
+ if (appDataPathForCurrentUser != null)
+ {
+ try
+ {
+ var lines = File.ReadAllText(Path.Combine(appDataPathForCurrentUser, "arguments.cfg"))
+ .Split(new[] { "\r\n", "\n", "\t", " " }, StringSplitOptions.RemoveEmptyEntries);
+ if (lines.Length != 0)
+ {
+ SafeProcessCommandLineArguments(__instance, lines);
+ handledFromFile = true;
+ }
+ }
+ catch { }
+ }
+
+ if (!handledFromFile)
+ {
+ var appDataPathForAllUsers = (string)AccessTools.Property(_applicationType.BaseType, "AppDataPathForAllUsers")?.GetValue(__instance);
+ if (appDataPathForAllUsers != null)
+ {
+ try
+ {
+ var lines = File.ReadAllText(Path.Combine(appDataPathForAllUsers, "arguments.cfg"))
+ .Split(new[] { "\r\n", "\n", "\t", " " }, StringSplitOptions.RemoveEmptyEntries);
+ if (lines.Length != 0)
+ {
+ SafeProcessCommandLineArguments(__instance, lines);
+ }
+ }
+ catch { }
+ }
+ }
+ }
+ catch (Exception ex)
+ {
+ Logger.Error("ProcessArguments replacement failed: " + ex);
+ }
+
+ return false;
+ }
+
+ // Replaces the static Application.SingleInstanceThread(). Mirrors the original's named
+ // pipe server loop exactly, except the received arguments are handed to
+ // SafeProcessCommandLineArguments on the dispatcher instead of the real
+ // ProcessCommandLineArguments.
+ static bool SingleInstanceThreadPrefix()
+ {
+ try
+ {
+ var application = System.Windows.Application.Current;
+ var isClosingProp = AccessTools.Property(_applicationType.BaseType, "IsClosing")
+ ?? AccessTools.Property(_applicationType, "IsClosing");
+ var singleInstanceIdProp = AccessTools.Property(_applicationType, "SingleInstanceId");
+ var delayDocumentOpenField = AccessTools.Field(_applicationType, "m_delayDocumentOpen");
+
+ Func isClosing = () => (bool)isClosingProp.GetValue(application);
+ string singleInstanceId = (string)singleInstanceIdProp.GetValue(application);
+
+ while (!isClosing())
+ {
+ try
+ {
+ using (var server = new NamedPipeServerStream(singleInstanceId))
+ {
+ server.WaitForConnection();
+ while ((bool)delayDocumentOpenField.GetValue(application))
+ {
+ Thread.Sleep(500);
+ }
+ if (isClosing()) continue;
+
+ try
+ {
+ using (var reader = new BinaryReader(server))
+ {
+ string text = reader.ReadString();
+ var arguments = text.Split(new[] { '\n' }, StringSplitOptions.RemoveEmptyEntries);
+ var argsToProcess = arguments.Skip(1).ToArray();
+ application.Dispatcher.BeginInvoke((Action)(() =>
+ {
+ SafeProcessCommandLineArguments(application, argsToProcess);
+ }));
+ }
+ }
+ catch { }
+ }
+ }
+ catch { }
+ }
+ }
+ catch (Exception ex)
+ {
+ Logger.Error("SingleInstanceThread replacement failed: " + ex);
+ }
+
+ return false;
+ }
+
+ // Safe stand-in for Application.ProcessCommandLineArguments(IEnumerable).
+ // Drops "affinity-open-file:" support (needs SharedStorageAccessManager, unsupported
+ // under Wine either way); everything else matches the original's behavior.
+ static void SafeProcessCommandLineArguments(object instance, IEnumerable arguments)
+ {
+ string callbackUrl = null;
+ var paths = new List();
+
+ foreach (var argument in arguments)
+ {
+ var lower = argument.ToLowerInvariant();
+ if (KnownFlags.Contains(lower)) continue;
+ if (lower.StartsWith("affinity-open-file:"))
+ {
+ Logger.Warning("Ignoring affinity-open-file: argument (needs SharedStorageAccessManager, unsupported under Wine)");
+ continue;
+ }
+ if (lower.StartsWith("affinity://"))
+ {
+ callbackUrl = argument;
+ continue;
+ }
+ paths.Add(argument);
+ }
+
+ bool mainWindowLoaded = (bool)AccessTools.Field(_applicationType, "m_mainWindowLoaded").GetValue(instance);
+ var activateMainWindow = AccessTools.Method(_applicationType, "ActivateMainWindow");
+ var loadFiles = AccessTools.Method(_applicationType, "LoadFiles", new[] { typeof(List) });
+
+ if (mainWindowLoaded)
+ {
+ activateMainWindow.Invoke(instance, null);
+ loadFiles.Invoke(instance, new object[] { paths });
+ }
+ else
+ {
+ var pathsToLoad = (List)AccessTools.Field(_applicationType, "m_pathsToLoad").GetValue(instance);
+ foreach (var p in paths)
+ {
+ if (!pathsToLoad.Contains(p)) pathsToLoad.Add(p);
+ }
+ activateMainWindow.Invoke(instance, null);
+ }
+
+ if (!string.IsNullOrEmpty(callbackUrl))
+ {
+ var openUrl = AccessTools.Method(_applicationType, "OpenUrl", new[] { typeof(string) });
+ openUrl.Invoke(instance, new object[] { callbackUrl });
+ }
+ }
+ }
+}
diff --git a/LoginFix/README.md b/LoginFix/README.md
new file mode 100644
index 0000000..6a9112e
--- /dev/null
+++ b/LoginFix/README.md
@@ -0,0 +1,43 @@
+# LoginFix
+
+LoginFix is an APL plugin which fixes the Canva sign-in flow crashing under Wine.
+
+WineFix's own "Canva sign-in dialog patched out" fix is a temporary workaround, pending a protocol handler fix. LoginFix is that fix: it lets sign-in complete instead of disabling it.
+
+## Install
+
+1. [Install APL](https://apl.ncuroe.dev/guide/installation/) first.
+2. Download `loginfix-vX.X.X.zip` from the [latest release](https://github.com/noahc3/AffinityPluginLoader/releases) and extract into your Affinity install directory.
+
+## What It Fixes
+
+`Serif.Affinity.Application.ProcessCommandLineArguments` has one branch, only reached for an unrelated `affinity-open-file:` argument, that calls the WinRT type `Windows.ApplicationModel.DataTransfer.SharedStorageAccessManager`. Wine has no implementation of that type.
+
+The .NET CLR resolves every type referenced anywhere in a method's body when it JITs that method, not just the branch actually taken. So any call into `ProcessCommandLineArguments` throws `System.TypeLoadException`, regardless of which arguments were passed.
+
+This matters because the Canva sign-in callback goes through this exact method. The second `Affinity.exe` instance the OS launches for the callback URL forwards its arguments to the already-running instance over a named pipe, and that named-pipe handler lands in `ProcessCommandLineArguments`. So login always crashed.
+
+Harmony itself cannot patch `ProcessCommandLineArguments` directly either. Patching a method, even with a plain prefix, requires Harmony to decompile its IL, which means resolving every operand in the method body, including the poisoned `SharedStorageAccessManager` call. A patch on that method throws the same `TypeLoadException`.
+
+LoginFix instead patches `ProcessCommandLineArguments`'s two callers:
+
+- `ProcessArguments()`, used for the app's own startup command line
+- `SingleInstanceThread()`, the named-pipe listener that receives the sign-in callback from the second launched instance
+
+Neither caller references the poisoned type directly, only by method signature, which Harmony can resolve without a problem. Both are fully replaced with a safe reimplementation that never calls the real `ProcessCommandLineArguments`. The only thing dropped is the unrelated `affinity-open-file:` handling, which needs `SharedStorageAccessManager` and cannot work under Wine regardless.
+
+## Compatibility with WineFix
+
+LoginFix and WineFix patch different methods and can run together. If you install both, WineFix's sign-in dialog suppression and LoginFix's working sign-in flow may conflict, since one hides the dialog and the other completes it. If you install LoginFix, you likely want to disable WineFix's sign-in dialog patch, if that becomes a separate toggle in a future WineFix release.
+
+## Licensing
+
+LoginFix is licensed under **GPLv2**. See the [LICENSE](LICENSE) file.
+
+### License Exemption
+
+[Canva](https://github.com/canva) and its subsidiaries are exempt from GPLv2 licensing and may (at its option) instead license any source code authored for the LoginFix project under the Zero-Clause BSD license.
+
+# Credits
+
+Built and verified on a manual Wine install and on Lutris, tested on stock distro Wine 11.15. See [AffinityOnLinux](https://github.com/seapear/AffinityOnLinux) for the project this fix was developed alongside.
diff --git a/README.md b/README.md
index b81c2a9..a686048 100644
--- a/README.md
+++ b/README.md
@@ -27,12 +27,16 @@ Plugins extend `AffinityPlugin` and use [Harmony](https://github.com/pardeike/Ha
WineFix is an APL plugin that fixes Wine-specific Affinity bugs. See [WineFix/](WineFix/) for an overview, or the [WineFix docs](https://apl.ncuroe.dev/winefix/) for full details.
+## LoginFix
+
+LoginFix is an APL plugin that fixes the Canva sign-in flow crashing under Wine. See [LoginFix/](LoginFix/) for the root cause and fix details.
+
## Licensing
APL (AffinityHook, AffinityBootstrap, AffinityPluginLoader) is licensed under the **MIT License**. See the LICENSE file under each project directory.
> [!WARNING]
-> WineFix is offered under a different license. See [WineFix#Licensing](WineFix#licensing) for information.
+> WineFix and LoginFix are offered under a different license. See [WineFix#Licensing](WineFix#licensing) and [LoginFix#Licensing](LoginFix#licensing) for information.
### License Exemption
diff --git a/docs/index.md b/docs/index.md
index 9c3875e..4cd6c90 100644
--- a/docs/index.md
+++ b/docs/index.md
@@ -12,3 +12,4 @@ Supports Windows and Linux (Wine).
- [Configuration](guide/configuration.md) — APL settings and how to configure them
- [Creating a Plugin](dev/creating-a-plugin.md) — Developer guide for building APL plugins
- [WineFix](winefix/index.md) — Plugin that fixes Wine-specific Affinity bugs
+- [LoginFix](loginfix/index.md) — Plugin that fixes the Canva sign-in crash under Wine
diff --git a/docs/loginfix/index.md b/docs/loginfix/index.md
new file mode 100644
index 0000000..73dddde
--- /dev/null
+++ b/docs/loginfix/index.md
@@ -0,0 +1,32 @@
+# LoginFix
+
+LoginFix is an APL plugin which fixes the Canva sign-in flow crashing under Wine.
+
+WineFix's own "Canva sign-in dialog patched out" fix is a temporary workaround, pending a protocol handler fix. LoginFix is that fix — it lets sign-in complete instead of disabling it.
+
+## Install
+
+1. [Install APL](../guide/installation.md) first.
+2. Download `loginfix-vX.X.X.zip` from the [latest release](https://github.com/noahc3/AffinityPluginLoader/releases) and extract into your Affinity install directory.
+
+LoginFix has no configurable settings, once installed, it just works.
+
+## What It Fixes
+
+`Serif.Affinity.Application.ProcessCommandLineArguments` has one branch, only reached for an unrelated `affinity-open-file:` argument, that calls the WinRT type `Windows.ApplicationModel.DataTransfer.SharedStorageAccessManager`. Wine has no implementation of that type.
+
+The .NET CLR resolves every type referenced anywhere in a method's body when it JITs that method, not just the branch actually taken. So any call into `ProcessCommandLineArguments` throws `System.TypeLoadException`, regardless of which arguments were passed.
+
+This matters because the Canva sign-in callback goes through this exact method. The second `Affinity.exe` instance the OS launches for the callback URL forwards its arguments to the already-running instance over a named pipe, and that named-pipe handler lands in `ProcessCommandLineArguments`. So login always crashed.
+
+Harmony itself cannot patch `ProcessCommandLineArguments` directly either, patching a method requires Harmony to decompile its IL, which means resolving every operand in the method body, including the poisoned `SharedStorageAccessManager` call.
+
+LoginFix instead patches `ProcessCommandLineArguments`'s two callers, `ProcessArguments()` (the app's own startup command line) and `SingleInstanceThread()` (the named-pipe listener that receives the sign-in callback). Neither references the poisoned type directly, only by method signature, which Harmony can resolve without a problem. Both are fully replaced with a safe reimplementation that never calls the real `ProcessCommandLineArguments`.
+
+## Compatibility with WineFix
+
+LoginFix and WineFix patch different methods and can run together. If both are installed, WineFix's sign-in dialog suppression and LoginFix's working sign-in flow may conflict, since one hides the dialog and the other completes it.
+
+## Licensing
+
+LoginFix is licensed under GPLv2, with a Zero-Clause BSD exemption for Canva and its subsidiaries. See the [LICENSE](https://github.com/noahc3/AffinityPluginLoader/blob/main/LoginFix/LICENSE) file.
diff --git a/mkdocs.yml b/mkdocs.yml
index 2b36742..f3b5df6 100644
--- a/mkdocs.yml
+++ b/mkdocs.yml
@@ -41,3 +41,5 @@ nav:
- Overview: winefix/index.md
- Installation: winefix/installation.md
- Configuration: winefix/configuration.md
+ - LoginFix:
+ - Overview: loginfix/index.md