public void Load(ILua lua, bool is_serverside, ModuleAssemblyLoadContext assembly_context)
{
// create usertype identifier
UserType_Id = lua.CreateMetaTable("Example_UserType");
// set meta-methods
// see http://www.tutorialspoint.com/lua/lua_metatables.htm for all meta-methods
// also checkout https://www.lua.org/pil/13.html for explanation about meta-methods/tables
// __index method
// __index is called when you trying to index usertype ex:
// MyCSString.Length
// MyCSString:ToCharArray()
// FindMetaTable("Example_UserType").ToCharArray(MyCSString)
lua.PushManagedFunction((lua) =>
{
IntPtr ptr = lua.GetUserType(1, UserType_Id);
if (ptr != IntPtr.Zero)
{
string indexingname = lua.GetString(2);
switch (indexingname)
{
// pushing simple number
case "Length":
GCHandle gCHandle = GCHandle.FromIntPtr(ptr);
string csString = (string)gCHandle.Target;
lua.PushNumber(csString.Length);
break;
// pushing function
case "ToCharArray":
lua.PushManagedFunction((lua) =>
{
IntPtr ptr = lua.GetUserType(1, UserType_Id);
GCHandle gCHandle = GCHandle.FromIntPtr(ptr);
string csString = (string)gCHandle.Target;
lua.CreateTable();
char[] charArray = csString.ToCharArray();
for (int i = 0; i < charArray.Length; i++)
{
lua.PushNumber(i);
lua.PushString(charArray[i].ToString());
lua.SetTable(-3);
}
return(1);
});
break;
case "Clone":
lua.PushManagedFunction((lua) =>
{
IntPtr ptr1 = lua.GetUserType(1, UserType_Id);
GCHandle gCHandle1 = GCHandle.FromIntPtr(ptr1);
string csString1 = (string)gCHandle1.Target;
string csString2 = (string)csString1.Clone();
GCHandle gCHandle2 = GCHandle.Alloc(csString2, GCHandleType.Weak);
IntPtr ptr2 = GCHandle.ToIntPtr(gCHandle2);
lua.PushUserType(ptr2, UserType_Id);
return(1);
});
break;
case "IndexOf":
lua.PushManagedFunction((lua) =>
{
IntPtr ptr = lua.GetUserType(1, UserType_Id);
GCHandle gCHandle = GCHandle.FromIntPtr(ptr);
string csString = (string)gCHandle.Target;
string toFind;
if (lua.IsType(2, TYPES.STRING))
{
toFind = lua.GetString(2);
}
else if (lua.IsType(2, UserType_Id))
{
IntPtr ptr2 = lua.GetUserType(2, UserType_Id);
GCHandle gCHandle2 = GCHandle.FromIntPtr(ptr2);
toFind = (string)gCHandle2.Target;
}
else
{
return(0);
}
int indexOf = csString.IndexOf(toFind);
lua.PushNumber(indexOf);
return(1);
});
break;
case "Contains":
lua.PushManagedFunction((lua) =>
{
IntPtr ptr = lua.GetUserType(1, UserType_Id);
GCHandle gCHandle = GCHandle.FromIntPtr(ptr);
string csString = (string)gCHandle.Target;
string toFind;
if (lua.IsType(2, TYPES.STRING))
{
toFind = lua.GetString(2);
}
else if (lua.IsType(2, UserType_Id))
{
IntPtr ptr2 = lua.GetUserType(2, UserType_Id);
GCHandle gCHandle2 = GCHandle.FromIntPtr(ptr2);
toFind = (string)gCHandle2.Target;
}
else
{
return(0);
}
bool contains = csString.Contains(toFind);
lua.PushBool(contains);
return(1);
});
break;
default:
lua.PushNil();
break;
}
}
else
{
Console.WriteLine("nil passed to __index");
lua.PushNil();
}
// function will return 1 result
return(1);
});
lua.SetField(-2, "__index");
lua.PushManagedFunction((lua) =>
{
// 1 - stands for 1st passed to function argument
IntPtr ptr = lua.GetUserType(1, UserType_Id);
if (ptr != IntPtr.Zero)
{
GCHandle gCHandle = GCHandle.FromIntPtr(ptr);
string csString = (string)gCHandle.Target;
lua.PushString(csString);
}
else
{
Console.WriteLine("nil passed to __tostring");
lua.PushNil();
}
return(1);
});
lua.SetField(-2, "__tostring");
// equal (==) method
lua.PushManagedFunction((lua) =>
{
IntPtr ptr1 = lua.GetUserType(1, UserType_Id);
IntPtr ptr2 = lua.GetUserType(2, UserType_Id);
// if we have same pointers, then objects are same
if (ptr1 == ptr2)
{
lua.PushBool(true);
}
// check if both pointers not zero
else if (ptr1 != IntPtr.Zero && ptr2 != IntPtr.Zero)
{
GCHandle gCHandle1 = GCHandle.FromIntPtr(ptr1);
GCHandle gCHandle2 = GCHandle.FromIntPtr(ptr2);
string csString1 = (string)gCHandle1.Target;
string csString2 = (string)gCHandle2.Target;
lua.PushBool(csString1 == csString2);
}
// some of pointers is Zero, we'll not compare them
else
{
lua.PushBool(false);
}
return(1);
});
lua.SetField(-2, "__eq");
// Dispose() in lua
lua.PushManagedFunction((lua) =>
{
// 1 - stands for 1st passed to function argument
IntPtr ptr = lua.GetUserType(1, UserType_Id);
if (ptr != IntPtr.Zero)
{
GCHandle gCHandle = GCHandle.FromIntPtr(ptr);
string csString = (string)gCHandle.Target;
Console.WriteLine($"csString ({csString}) is garbage collected");
gCHandle.Free();
}
else
{
Console.WriteLine("nil passed to __gc");
}
return(0);
});
lua.SetField(-2, "__gc");
lua.Pop();
// now we need to somehow create it
lua.PushSpecial(SPECIAL_TABLES.SPECIAL_GLOB);
lua.PushManagedFunction((lua) =>
{
string csString = lua.GetString(1);
GCHandle gCHandle = GCHandle.Alloc(csString, GCHandleType.Weak);
IntPtr ptr = GCHandle.ToIntPtr(gCHandle);
lua.PushUserType(ptr, UserType_Id);
return(1);
});
lua.SetField(-2, "CreateCSString");
lua.Pop();
}
public Task <bool> Start(ILua lua, GetILuaFromLuaStatePointer lua_extructor, ModuleAssemblyLoadContext _)
{
TaskCompletionSource <bool> taskCompletion = new TaskCompletionSource <bool>();
try
{
this.lua_extructor = lua_extructor;
// Create new type
this.type_id = lua.CreateMetaTable("SetTableAndRawSetTestType");
lua.PushManagedFunction(this.newIndexImpl);
lua.SetField(-2, "__newindex");
lua.Pop(1);
// Create test table
lua.CreateTable();
lua.PushString(random1);
lua.SetField(-2, "Val");
lua.PushMetaTable(this.type_id);
lua.SetMetaTable(-2);
// Test SetTable
lua.PushString("Val");
lua.PushString(random1 + random1);
lua.SetTable(-3);
lua.GetField(-1, "Val");
string received_string = lua.GetString(-1);
lua.Pop(1);
if (received_string != random1 + random1)
{
throw new Exception("SetTable didn't set a value for an existing key");
}
lua.PushString("ArbitraryKey");
lua.PushString("ArbitraryString");
lua.SetTable(-3);
lua.GetField(-1, "ArbitraryKey");
int received_type = lua.GetType(-1);
lua.Pop(1);
if (received_type != (int)TYPES.NIL)
{
throw new Exception("SetTable ignored overriden __newindex");
}
lua.PushString("Val2");
lua.PushString(random2);
lua.RawSet(-3);
lua.GetField(-1, "Val2");
string received_string2 = lua.GetString(-1);
lua.Pop(1);
if (received_string2 != random2)
{
throw new Exception("RawSet didn't set a value to a key");
}
lua.Pop(1);
lua.PushMetaTable(type_id);
lua.PushNil();
lua.SetField(-2, "__newindex");
lua.Pop(1);
taskCompletion.TrySetResult(true);
}
catch (Exception e)
{
taskCompletion.TrySetException(new Exception[] { e });
}
return(taskCompletion.Task);
}
void IModule.Load(ILua lua, bool is_serverside, ModuleAssemblyLoadContext assembly_context)
{
if (is_serverside)
{
throw new Exception("Must be loaded from client");
}
string platformIdentifier = OperatingSystem.IsWindows() ? "win-x64" : "linux-x64";
assembly_context.SetCustomNativeLibraryResolver((ctx, str) =>
{
if (str.Contains("sourcesdkc"))
{
if (sourcesdkc == IntPtr.Zero)
{
Console.WriteLine("loading sourcesdkc");
sourcesdkc = NativeLibrary.Load($"./garrysmod/lua/bin/Modules/GetRenderTargetExample/runtimes/{platformIdentifier}/native/sourcesdkc");
Console.WriteLine($"loaded sourcesdkc: {sourcesdkc != IntPtr.Zero}");
}
return(sourcesdkc);
}
return(IntPtr.Zero);
});
if (interfaceh.Sys_LoadInterface("vguimatsurface", ISurface.VGUI_SURFACE_INTERFACE_VERSION, out _, out IntPtr isurfacePtr))
{
surface = new(isurfacePtr);
}
else
{
throw new Exception("failed loading vguimatsurface");
}
if (interfaceh.Sys_LoadInterface("materialsystem", IMaterialSystem.MATERIAL_SYSTEM_INTERFACE_VERSION, out _, out IntPtr materialSystemPtr))
{
materialSystem = new(materialSystemPtr);
}
else
{
Console.WriteLine("failed loading materialsystem");
}
lua.PushSpecial(SPECIAL_TABLES.SPECIAL_GLOB);
lua.GetField(-1, "GetRenderTarget");
lua.PushString("ExampleRTwithAlpha");
lua.PushNumber(512);
lua.PushNumber(512);
lua.MCall(3, 1);
rt = lua.GetUserType(-1, (int)TYPES.TEXTURE);
lua.Pop();
lua.PushSpecial(SPECIAL_TABLES.SPECIAL_GLOB);
lua.GetField(-1, "CreateMaterial");
lua.PushString("ExampleRTwithAlpha_Mat");
lua.PushString("UnlitGeneric");
lua.CreateTable();
{
lua.PushString("$basetexture");
lua.PushString("ExampleRTwithAlpha");
lua.SetTable(-3);
lua.PushString("$translucent");
lua.PushString("1");
lua.SetTable(-3);
}
lua.MCall(3, 1);
mat = lua.GetUserType(-1, (int)TYPES.MATERIAL);
lua.Pop();
lua.PushSpecial(SPECIAL_TABLES.SPECIAL_GLOB);
lua.GetField(-1, "hook");
lua.GetField(-1, "Add");
lua.PushString("HUDPaint");
lua.PushString("ExampleRTwithAlpha_Render");
lua.PushManagedFunction(Render);
lua.MCall(3, 0);
lua.Pop();
}