/// <summary>
/// Function to convert this geometry shader to use a stream output.
/// </summary>
/// <param name="streamOutLayout">The stream output layout for the shader.</param>
/// <param name="strides">[Optional] A list of strides that define the size of an element for each buffer.</param>
/// <returns>A new <see cref="GorgonGeometryShader"/> that is capable of stream output.</returns>
/// <exception cref="ArgumentNullException">Thrown when the <paramref name="streamOutLayout"/> parameter is <b>null</b>.</exception>
/// <remarks>
/// <para>
/// A base geometry shader must be converted to use stream output if an application wants to send data from the shader into a buffer.
/// </para>
/// <para>
/// If the <paramref name="strides"/> parameter is supplied, then it will be limited to 4 items at most, any more than that and the list will be truncated.
/// </para>
/// </remarks>
public GorgonGeometryShader ToStreamOut(GorgonStreamOutLayout streamOutLayout, IEnumerable <int> strides = null)
{
if (streamOutLayout == null)
{
throw new ArgumentNullException(nameof(streamOutLayout));
}
int[] strideList = strides?.Take(4).ToArray() ?? Array.Empty <int>();
// Clone the byte code just in case we decide to destroy the original.
var byteCode = new ShaderBytecode(D3DByteCode.Data);
Graphics.Log.Print($"Converting '{Name}' to Stream-Out.", LoggingLevel.Verbose);
var shader = new D3D11.GeometryShader(Graphics.D3DDevice, byteCode, streamOutLayout.Native, strideList, 0)
{
DebugName = $"{Name}_ID3D11GeometryShader (SO)"
};
var result = new GorgonGeometryShader(Graphics, Name + " (SO)", IsDebug, byteCode, shader)
{
StreamOutLayout = streamOutLayout
};
result.RegisterDisposable(Graphics);
return(result);
}
/// <summary>
/// Function to set the current geometry shader on the pipeline.
/// </summary>
/// <param name="geometryShader">The geometry shader to assign.</param>
/// <returns>The fluent interface for this builder.</returns>
public GorgonPipelineStateBuilder GeometryShader(GorgonGeometryShader geometryShader)
{
_workState.GeometryShader = geometryShader;
return(this);
}
