/// <summary>
///
/// </summary>
void SetupShadersAndLayouts()
{
ps = PixelShader == null ? null : new D3DPixelShader(device.Device, PixelShader.Bytecode);
vs = VertexShader == null ? null : new D3DVertexShader(device.Device, VertexShader.Bytecode);
gs = GeometryShader == null ? null : new D3DGeometryShader(device.Device, GeometryShader.Bytecode);
hs = HullShader == null ? null : new D3DHullShader(device.Device, HullShader.Bytecode);
ds = DomainShader == null ? null : new D3DDomainShader(device.Device, DomainShader.Bytecode);
cs = ComputeShader == null ? null : new D3DComputeShader(device.Device, ComputeShader.Bytecode);
if (cs != null)
{
if (ps != null || vs != null || gs != null || hs != null || ds != null)
{
throw new InvalidOperationException("If ComputeShader is set, other shader must be set null.");
}
}
else
{
if (vs == null)
{
throw new InvalidOperationException("Vertex shader must be set.");
}
}
if (VertexInputElements == null)
{
inputLayout = null;
}
else
{
inputLayout = new InputLayout(device.Device, VertexShader.Bytecode, VertexInputElement.Convert(VertexInputElements));
}
if (VertexOutputElements != null)
{
if (GeometryShader == null)
{
throw new InvalidOperationException("Geometry shader is required for vertex output.");
}
var outputElements = VertexOutputElement.Convert(VertexOutputElements);
int maxBuffers = outputElements.Max(oe => oe.OutputSlot) + 1;
var bufferedStrides = new int[maxBuffers];
for (int i = 0; i < maxBuffers; i++)
{
bufferedStrides[i] = outputElements
.Where(oe1 => oe1.OutputSlot == i)
.Sum(oe2 => oe2.ComponentCount) * 4;
}
gs = new D3DGeometryShader(device.Device, GeometryShader.Bytecode, outputElements, bufferedStrides, RasterizedStream);
}
}
/// <summary>
/// Converts VertexOutputElement to StreamOutputElement
/// </summary>
/// <param name="elements"></param>
/// <returns></returns>
internal static StreamOutputElement[] Convert( VertexOutputElement[] elements )
{
return elements.Select( e => new StreamOutputElement() {
ComponentCount = e.ComponentCount,
OutputSlot = e.OutputSlot,
SemanticIndex = e.SemanticIndex,
SemanticName = e.SemanticName,
StartComponent = e.StartComponent,
Stream = e.Stream
} ).ToArray();
}
