/// <summary>
/// Function to set a single stream output buffer.
/// </summary>
/// <param name="buffer">Buffer to set.</param>
/// <remarks>Stream output buffers are only used by the <see cref="GorgonLibrary.Graphics.GorgonOutputGeometryShader">GorgonOutputGeometryShader</see> object. If the currently bound shader
/// is not an output geometry shader, then any values set here will be ignored.</remarks>
public void SetStreamOutputBuffer(GorgonOutputBufferBinding buffer)
{
if ((_bindings != null) && (GorgonOutputBufferBinding.Equals(ref buffer, ref _bindings[0])))
{
return;
}
if ((_bindings == null) || (_bindings.Length != 1))
{
_bindings = null;
_D3Dbindings = null;
if (!buffer.Equals(GorgonOutputBufferBinding.Empty))
{
_bindings = new GorgonOutputBufferBinding[1];
_D3Dbindings = new D3D.StreamOutputBufferBinding[1];
}
}
if ((_bindings != null) && (_D3Dbindings != null))
{
_bindings[0] = buffer;
_D3Dbindings[0] = buffer.Convert();
Graphics.Context.StreamOutput.SetTargets(_D3Dbindings);
}
else
{
Graphics.Context.StreamOutput.SetTargets(null);
}
}
/// <summary>
/// Function to set a list of stream output buffers at the same time.
/// </summary>
/// <param name="buffers">Buffers to bind.</param>
/// <remarks>Stream output buffers are only used by the <see cref="GorgonLibrary.Graphics.GorgonOutputGeometryShader">GorgonOutputGeometryShader</see> object. If the currently bound shader
/// is not an output geometry shader, then any values set here will be ignored.</remarks>
public void SetStreamOutputBuffers(GorgonOutputBufferBinding[] buffers)
{
bool hasChanged = false;
// If we didn't pass any buffers, then unbind everything.
if ((buffers == null) || (buffers.Length == 0))
{
if (_bindings == null)
{
return;
}
Graphics.Context.StreamOutput.SetTargets(null);
_bindings = null;
_D3Dbindings = null;
return;
}
if ((_bindings == null) || (_bindings.Length != buffers.Length))
{
_bindings = new GorgonOutputBufferBinding[buffers.Length];
_D3Dbindings = new D3D.StreamOutputBufferBinding[buffers.Length];
hasChanged = true;
}
// Copy.
for (int i = 0; i < _bindings.Length; i++)
{
var buffer = buffers[i];
if (GorgonOutputBufferBinding.Equals(ref _bindings[i], ref buffer))
{
continue;
}
hasChanged = true;
_bindings[i] = buffer;
_D3Dbindings[i] = buffer.Convert();
}
if (hasChanged)
{
Graphics.Context.StreamOutput.SetTargets(_D3Dbindings);
}
}