private static void SetDefaultBinding(IGraphicsService graphicsService, EffectEx effectEx, EffectParameter parameter, EffectParameterDescription usage, EffectParameterBindingCollection bindings)
{
Debug.Assert(!bindings.Contains(parameter), "Effect binding already contains a binding for the given effect parameter.");
if (parameter.ParameterClass == EffectParameterClass.Struct)
{
if (parameter.Elements.Count > 0)
{
// ----- Effect parameter is an array of structs. --> Recursively process elements of array.
foreach (EffectParameter element in parameter.Elements)
SetDefaultBinding(graphicsService, effectEx, element, usage, bindings);
}
else
{
// ----- Effect parameter is a struct. --> Recursively process members of struct.
foreach (EffectParameter member in parameter.StructureMembers)
SetDefaultBinding(graphicsService, effectEx, member, usage, bindings);
}
return;
}
// Set ConstParameterBinding using the default value stored in .fx file.
var effect = effectEx.Resource;
object originalValue;
effectEx.OriginalParameterValues.TryGetValue(parameter, out originalValue);
EffectParameterBinding binding = null;
if (parameter.Elements.Count == 0)
{
// ----- Parameter is not an array.
if (parameter.ParameterClass == EffectParameterClass.Scalar)
{
// Scalar values.
if (parameter.ParameterType == EffectParameterType.Bool)
binding = new ConstParameterBinding<bool>(effect, parameter, (bool)originalValue);
else if (parameter.ParameterType == EffectParameterType.Int32)
binding = new ConstParameterBinding<int>(effect, parameter, (int)originalValue);
else if (parameter.ParameterType == EffectParameterType.Single)
binding = new ConstParameterBinding<float>(effect, parameter, (float)originalValue);
}
else if (parameter.ParameterClass == EffectParameterClass.Vector
&& parameter.ParameterType == EffectParameterType.Single)
{
// Vector values.
if (parameter.ColumnCount == 2 || parameter.RowCount == 2)
binding = new ConstParameterBinding<Vector2>(effect, parameter, (Vector2)originalValue);
else if (parameter.ColumnCount == 3 || parameter.RowCount == 3)
binding = new ConstParameterBinding<Vector3>(effect, parameter, (Vector3)originalValue);
else if (parameter.ColumnCount == 4 || parameter.RowCount == 4)
binding = new ConstParameterBinding<Vector4>(effect, parameter, (Vector4)originalValue);
}
else if (parameter.ParameterClass == EffectParameterClass.Matrix
&& parameter.ParameterType == EffectParameterType.Single)
{
// Matrix value.
binding = new ConstParameterBinding<Matrix>(effect, parameter, (Matrix)originalValue);
}
else if (parameter.ParameterClass == EffectParameterClass.Object)
{
// Object values.
if (parameter.ParameterType == EffectParameterType.String)
{
binding = new ConstParameterBinding<string>(effect, parameter, (string)originalValue);
}
else if (parameter.ParameterType == EffectParameterType.Texture)
{
// A texture type but we are not sure which exact type. --> Try different types.
try
{
binding = new ConstParameterBinding<Texture2D>(effect, parameter, graphicsService.GetDefaultTexture2DWhite());
}
catch (Exception)
{
try
{
binding = new ConstParameterBinding<Texture3D>(effect, parameter, graphicsService.GetDefaultTexture3DWhite());
}
catch (Exception)
{
try
{
binding = new ConstParameterBinding<TextureCube>(effect, parameter, graphicsService.GetDefaultTextureCubeWhite());
}
catch (Exception)
{
// Default value for a parameter of type Texture could not be read from Effect.
}
}
}
}
else if (parameter.ParameterType == EffectParameterType.Texture1D)
{
// NOTE: 1D textures are not supported in XNA.
}
else if (parameter.ParameterType == EffectParameterType.Texture2D)
{
binding = new ConstParameterBinding<Texture2D>(effect, parameter, graphicsService.GetDefaultTexture2DWhite());
}
else if (parameter.ParameterType == EffectParameterType.Texture3D)
{
binding = new ConstParameterBinding<Texture3D>(effect, parameter, graphicsService.GetDefaultTexture3DWhite());
}
else if (parameter.ParameterType == EffectParameterType.TextureCube)
{
binding = new ConstParameterBinding<TextureCube>(effect, parameter, graphicsService.GetDefaultTextureCubeWhite());
}
}
}
else
{
// ----- Parameter is array.
int length = parameter.Elements.Count;
Debug.Assert(length > 0, "Effect parameter should be an array.");
// Note: In XNA originalValue is valid. In MonoGame originalValue is null and we have to
// create a new array!
if (parameter.ParameterClass == EffectParameterClass.Scalar)
{
// Scalar value bindings.
if (parameter.ParameterType == EffectParameterType.Bool)
binding = new ConstParameterArrayBinding<bool>(effect, parameter, (bool[])originalValue ?? new bool[parameter.Elements.Count]);
else if (parameter.ParameterType == EffectParameterType.Int32)
binding = new ConstParameterArrayBinding<int>(effect, parameter, (int[])originalValue ?? new int[parameter.Elements.Count]);
else if (parameter.ParameterType == EffectParameterType.Single)
binding = new ConstParameterArrayBinding<float>(effect, parameter, (float[])originalValue ?? new float[parameter.Elements.Count]);
}
else if (parameter.ParameterClass == EffectParameterClass.Vector && parameter.ParameterType == EffectParameterType.Single)
{
if (parameter.ColumnCount == 2 || parameter.RowCount == 2)
binding = new ConstParameterArrayBinding<Vector2>(effect, parameter, (Vector2[])originalValue ?? new Vector2[parameter.Elements.Count]);
else if (parameter.ColumnCount == 3 || parameter.RowCount == 3)
binding = new ConstParameterArrayBinding<Vector3>(effect, parameter, (Vector3[])originalValue ?? new Vector3[parameter.Elements.Count]);
else if (parameter.ColumnCount == 4 || parameter.RowCount == 4)
binding = new ConstParameterArrayBinding<Vector4>(effect, parameter, (Vector4[])originalValue ?? new Vector4[parameter.Elements.Count]);
}
else if (parameter.ParameterClass == EffectParameterClass.Matrix && parameter.ParameterType == EffectParameterType.Single)
{
binding = new ConstParameterArrayBinding<Matrix>(effect, parameter, (Matrix[])originalValue ?? new Matrix[parameter.Elements.Count]);
}
else if (parameter.ParameterClass == EffectParameterClass.Object)
{
// Note: Arrays of strings or textures are not supported in XNA.
}
}
if (binding != null)
bindings.Add(binding);
}