/// <summary>
/// Initializes a new instance of the <see cref="VertexInputLayout" />.
/// </summary>
/// <param name="layouts">A set of description of input layout for each slots in input-assembler stage.</param>
/// <returns>A new instance of <see cref="VertexInputLayout"/>.</returns>
public static VertexInputLayout New(params VertexBufferLayout[] layouts)
{
// Make sure that the original buffer won't be modified, so we make a copy.
var layoutCopy = new VertexBufferLayout[layouts.Length];
Array.Copy(layouts, layoutCopy, layouts.Length);
// Create a readonly array.
var vertexBufferLayouts = new ReadOnlyArray <VertexBufferLayout>(layoutCopy);
// Register a unique VertexInputLayout.
lock (VertexBufferBindingCache)
{
VertexInputLayout vertexInputLayout;
if (!VertexBufferBindingCache.TryGetValue(vertexBufferLayouts, out vertexInputLayout))
{
vertexInputLayout = new VertexInputLayout(VertexBufferBindingCache.Count, vertexBufferLayouts);
VertexBufferBindingCache.Add(vertexBufferLayouts, vertexInputLayout);
}
return(vertexInputLayout);
}
}
/// <summary>
/// Initializes a new instance of the <see cref="VertexInputLayout" /> with a single slot from a structure that is using <see cref="VertexElementAttribute"/>.
/// </summary>
/// <typeparam name="T">Type of a structure that is using <see cref="VertexElementAttribute" />.</typeparam>
/// <param name="slot">The slot index in the input-assembler stage.</param>
/// <returns>A new instance of <see cref="VertexInputLayout"/>.</returns>
public static VertexInputLayout FromBuffer <T>(int slot, Buffer <T> buffer) where T : struct
{
return(New(VertexBufferLayout.New(slot, typeof(T))));
}
/// <summary>
/// Initializes a new instance of the <see cref="VertexInputLayout" /> with a single slot.
/// </summary>
/// <param name="slot">The slot index in the input-assembler stage.</param>
/// <param name="vertexElements">Description of vertex elements.</param>
/// <returns>A new instance of <see cref="VertexInputLayout"/>.</returns>
public static VertexInputLayout New(int slot, params VertexElement[] vertexElements)
{
return(New(VertexBufferLayout.New(slot, vertexElements)));
}
/// <summary>
/// Initializes a new instance of the <see cref="VertexInputLayout" /> with a single slot from a structure that is using <see cref="VertexElementAttribute"/>.
/// </summary>
/// <param name="slot">The slot index in the input-assembler stage.</param>
/// <param name="structType">Type of a structure that is using <see cref="VertexElementAttribute" />.</param>
/// <returns>A new instance of <see cref="VertexInputLayout"/>.</returns>
public static VertexInputLayout New(int slot, Type structType)
{
return(New(VertexBufferLayout.New(slot, structType)));
}
