private static ResourceRecord GetResource(Type type)
{
if (type == null)
{
throw new ArgumentNullException("type");
}
ResourceRecord result;
if (_impls.TryGetValue(type, out result))
{
return(result);
}
var assemblyName = new AssemblyName {
Name = "tmp_" + type.Name
};
var assemblyBuilder = AppDomain.CurrentDomain.DefineDynamicAssembly(assemblyName, AssemblyBuilderAccess.Run);
var module = assemblyBuilder.DefineDynamicModule("tmpModule");
var typeBuilder = module.DefineType(type.Name + "SharedSingletonWrapper", TypeAttributes.Public | TypeAttributes.Class, type);
var baseDispose = type.GetMethod("Dispose", BindingFlags.Public | BindingFlags.Instance);
if (baseDispose.IsFinal)
{
throw new Exception(type.Name + ".Dispose() is final");
}
var disposeFun = typeBuilder.DefineMethod("Dispose", MethodAttributes.Virtual | MethodAttributes.Public, typeof(void), Type.EmptyTypes);
var disposeBaseFun = typeBuilder.DefineMethod("DisposeBase", MethodAttributes.Public, typeof(void), Type.EmptyTypes);
typeBuilder.DefineField("key", typeof(AllocationKey), FieldAttributes.Public);
var ilDispose = disposeFun.GetILGenerator();
var release = ReflectionMarkerAttribute.FindMethod(
typeof(ResourceManager), ReflectionToken.ResourceHelperRelease);
ilDispose.Emit(OpCodes.Ldarg, 0);
ilDispose.Emit(OpCodes.Call, release);
ilDispose.Emit(OpCodes.Ret);
var ilDisposeBase = disposeBaseFun.GetILGenerator();
ilDisposeBase.Emit(OpCodes.Ldarg, 0);
ilDisposeBase.Emit(OpCodes.Call, type.GetMethod("Dispose", BindingFlags.Public | BindingFlags.Instance));
ilDisposeBase.Emit(OpCodes.Ret);
foreach (var tctor in type.GetConstructors(BindingFlagsAny))
{
if (tctor.IsPrivate)
{
continue;
}
// create a default ctor for T'
var tparams = tctor.GetParameters();
var nparams = new Type[tparams.Length];
for (var i = 0; i < tparams.Length; i++)
{
nparams[i] = tparams[i].ParameterType;
}
var ttctor = typeBuilder.DefineConstructor(MethodAttributes.Public, tctor.CallingConvention, nparams);
var cil = ttctor.GetILGenerator();
for (var i = 0; i < tparams.Length + 1; i++)
{
cil.Emit(OpCodes.Ldarg, i);
}
cil.Emit(OpCodes.Call, tctor);
cil.Emit(OpCodes.Ret);
}
result = new ResourceRecord
{
Implementation = typeBuilder.CreateType()
};
_impls[type] = result;
return(result);
}
/// <summary>
/// Reflection utility that implements a shader around any user defined shader.
/// Creating code for any uniform defined.
/// </summary>
/// <param name="type">The shader type to derive from</param>
/// <returns>A constructor to the derived type</returns>
private static ConstructorInfo GetConstructor(Type type)
{
var baseBegin = ReflectionMarkerAttribute.FindMethod(
typeof(Shader), ReflectionToken.ShaderBegin);
if (type.IsNotPublic)
{
throw new Exception("Type " + type.Name + " must be public");
}
ConstructorInfo ctor;
if (_ctors.TryGetValue(type, out ctor))
{
try
{
return(ctor);
}
catch (Exception e)
{
throw e.InnerException;
}
}
var assemblyName = new AssemblyName {
Name = "tmp_" + type.Name
};
var assemblyBuilder = AppDomain.CurrentDomain.DefineDynamicAssembly(assemblyName, AssemblyBuilderAccess.Run);
var module = assemblyBuilder.DefineDynamicModule("tmpModule");
var typeBuilder = module.DefineType(type.Name + "_impl", TypeAttributes.Public | TypeAttributes.Class, type);
var beginFun = typeBuilder.DefineMethod(baseBegin.Name, MethodAttributes.Virtual | MethodAttributes.Public, typeof(void), Type.EmptyTypes);
var ilBeg = beginFun.GetILGenerator();
var getName = ReflectionMarkerAttribute.FindProperty(
typeof(Shader), ReflectionToken.ShaderName).GetGetMethod();
var nameIndex = ilBeg.DeclareLocal(typeof(IProgram)).LocalIndex;
var shaderActivate = ReflectionMarkerAttribute.FindMethod(
typeof(Shader), ReflectionToken.ShaderActivate);
ilBeg.Emit(OpCodes.Ldarg, 0);
ilBeg.Emit(OpCodes.Call, shaderActivate);
ilBeg.Emit(OpCodes.Ldarg, 0);
ilBeg.Emit(OpCodes.Call, getName);
ilBeg.Emit(OpCodes.Stloc, nameIndex);
foreach (var prop in type.GetProperties(BindingFlagsAny))
{
var attr = prop.GetCustomAttributes(typeof(UniformAttribute), false);
if (attr.Length == 0)
{
continue;
}
var info = TypeMap[prop.PropertyType.MetadataToken];
var uniformCall = Binding.Resolve(info.Token);
var f = typeBuilder.DefineField("m_" + prop.Name, typeof(int), FieldAttributes.Private);
//var visibility = prop.PropertyType.IsPublic ? MethodAttributes.Public : MethodAttributes.Family;
const MethodAttributes visibility = MethodAttributes.Public;
var getter = prop.GetSetMethod() != null?prop.GetGetMethod().Name : "get_" + prop.Name;
var setter = prop.GetSetMethod() != null?prop.GetSetMethod().Name : "set_" + prop.Name;
var m = typeBuilder.DefineMethod(setter, MethodAttributes.Virtual | visibility, typeof(void), new[] { prop.PropertyType });
var ilg = m.GetILGenerator();
ilg.Emit(OpCodes.Ldarg, 0);
ilg.Emit(OpCodes.Ldfld, f);
if (uniformCall.GetParameters().Length == 2)
{
ilg.Emit(OpCodes.Ldarg, 1);
}
ilg.Emit(OpCodes.Call, uniformCall);
ilg.Emit(OpCodes.Ret);
m = typeBuilder.DefineMethod(getter, MethodAttributes.Virtual | visibility, prop.PropertyType, Type.EmptyTypes);
ilg = m.GetILGenerator();
ilg.Emit(OpCodes.Newobj, typeof(NotImplementedException));
ilg.Emit(OpCodes.Throw);
}
ilBeg.Emit(OpCodes.Ldarg, 0);
ilBeg.Emit(OpCodes.Call, type.GetMethod(baseBegin.Name, Type.EmptyTypes));
ilBeg.Emit(OpCodes.Ret);
// implement in accessors
foreach (var prop in type.GetProperties(BindingFlagsAny))
{
var attr = prop.GetCustomAttributes(typeof(VertexInAttribute), false);
if (attr.Length == 0)
{
continue;
}
var getter = prop.GetSetMethod() != null?prop.GetGetMethod().Name : "get_" + prop.Name;
var setter = prop.GetSetMethod() != null?prop.GetSetMethod().Name : "set_" + prop.Name;
//var visibility = prop.PropertyType.IsPublic ? MethodAttributes.Public : MethodAttributes.Family;
const MethodAttributes visibility = MethodAttributes.Public;
var m = typeBuilder.DefineMethod(setter, MethodAttributes.Virtual | visibility, typeof(void), new[] { prop.PropertyType });
var ilg = m.GetILGenerator();
ilg.Emit(OpCodes.Newobj, typeof(NotImplementedException));
ilg.Emit(OpCodes.Throw);
m = typeBuilder.DefineMethod(getter, MethodAttributes.Virtual | visibility, prop.PropertyType, Type.EmptyTypes);
ilg = m.GetILGenerator();
ilg.Emit(OpCodes.Newobj, typeof(NotImplementedException));
ilg.Emit(OpCodes.Throw);
}
var timpl = typeBuilder.CreateType();
ctor = timpl.GetConstructor(Type.EmptyTypes);
_ctors[type] = ctor;
return(ctor);
}
