private static InputLayout CreateLayout(Device device, byte[] shaderBytecode, MaterialVertexInput[] vertexInputs)
{
int count = vertexInputs.Sum(mvi => mvi.Elements.Length);
int element = 0;
InputElement[] elements = new InputElement[count];
SemanticIndices indicesTracker = new SemanticIndices();
for (int vbSlot = 0; vbSlot < vertexInputs.Length; vbSlot++)
{
MaterialVertexInput bufferInput = vertexInputs[vbSlot];
int numElements = bufferInput.Elements.Length;
int currentOffset = 0;
for (int i = 0; i < numElements; i++)
{
var genericElement = bufferInput.Elements[i];
elements[element] = new InputElement(
GetSemanticName(genericElement.SemanticType),
indicesTracker.GetAndIncrement(genericElement.SemanticType),
ConvertGenericFormat(genericElement.ElementFormat),
currentOffset,
vbSlot,
D3DFormats.ConvertInputClass(genericElement.StorageClassifier),
genericElement.InstanceStepRate);
currentOffset += genericElement.SizeInBytes;
element += 1;
}
}
return(new InputLayout(device, shaderBytecode, elements));
}
public static int GetAndIncrement(ref SemanticIndices si, VertexElementSemantic type)
{
switch (type)
{
case VertexElementSemantic.Position:
return(si._position++);
case VertexElementSemantic.TextureCoordinate:
return(si._texCoord++);
case VertexElementSemantic.Normal:
return(si._normal++);
case VertexElementSemantic.Color:
return(si._color++);
default:
throw Illegal.Value <VertexElementSemantic>();
}
}
private InputLayout CreateNewInputLayout(VertexLayoutDescription[] vertexLayouts, byte[] vsBytecode)
{
int totalCount = 0;
for (int i = 0; i < vertexLayouts.Length; i++)
{
totalCount += vertexLayouts[i].Elements.Length;
}
int element = 0; // Total element index across slots.
InputElement[] elements = new InputElement[totalCount];
SemanticIndices si = new SemanticIndices();
for (int slot = 0; slot < vertexLayouts.Length; slot++)
{
VertexElementDescription[] elementDescs = vertexLayouts[slot].Elements;
uint stepRate = vertexLayouts[slot].InstanceStepRate;
int currentOffset = 0;
for (int i = 0; i < elementDescs.Length; i++)
{
VertexElementDescription desc = elementDescs[i];
elements[element] = new InputElement(
GetSemanticString(desc.Semantic),
SemanticIndices.GetAndIncrement(ref si, desc.Semantic),
D3D11Formats.ToDxgiFormat(desc.Format),
currentOffset,
slot,
stepRate == 0 ? InputClassification.PerVertexData : InputClassification.PerInstanceData,
(int)stepRate);
currentOffset += (int)FormatHelpers.GetSizeInBytes(desc.Format);
element += 1;
}
}
return(new InputLayout(_device, vsBytecode, elements));
}
