/// <summary>
/// Creates the buffer description.
/// </summary>
/// <param name="size">The size (in bytes).</param>
/// <param name="flags">The flags.</param>
/// <param name="format">The format.</param>
/// <param name="initData">The initial data.</param>
/// <param name="stride">The stride.</param>
/// <param name="usage">The usage.</param>
/// <returns>The buffer description.</returns>
public static GPUBufferDescription Buffer(int size, GPUBufferFlags flags, PixelFormat format = PixelFormat.Unknown, IntPtr initData = new IntPtr(), int stride = 0, GPUResourceUsage usage = GPUResourceUsage.Default)
{
GPUBufferDescription desc;
desc.Size = (uint)size;
desc.Stride = (uint)stride;
desc.Flags = flags;
desc.Format = format;
desc.InitData = initData;
desc.Usage = usage;
return(desc);
}
/// <summary>
/// Creates typed buffer description.
/// </summary>
/// <param name="count">The elements count.</param>
/// <param name="viewFormat">The view format.</param>
/// <param name="isUnorderedAccess">True if use UAV, otherwise false.</param>
/// <param name="usage">The usage.</param>
/// <returns>The buffer description.</returns>
/// <remarks>
/// Example in HLSL: Buffer<float4>.
/// </remarks>
public static GPUBufferDescription Typed(int count, PixelFormat viewFormat, bool isUnorderedAccess = false, GPUResourceUsage usage = GPUResourceUsage.Default)
{
var bufferFlags = GPUBufferFlags.ShaderResource;
if (isUnorderedAccess)
{
bufferFlags |= GPUBufferFlags.UnorderedAccess;
}
var stride = PixelFormatExtensions.SizeInBytes(viewFormat);
return(Buffer(count * stride, bufferFlags, viewFormat, IntPtr.Zero, stride, usage));
}
/// <summary>
/// Creates raw buffer description.
/// </summary>
/// <param name="data">The initial data.</param>
/// <param name="size">The size (in bytes).</param>
/// <param name="additionalFlags">The additional bindings (for example, to create a combined raw/index buffer, pass <see cref="GPUBufferFlags.IndexBuffer" />).</param>
/// <param name="usage">The usage.</param>
/// <returns>The buffer description.</returns>
public static GPUBufferDescription Raw(IntPtr data, int size, GPUBufferFlags additionalFlags = GPUBufferFlags.None, GPUResourceUsage usage = GPUResourceUsage.Default)
{
return(Buffer(size, GPUBufferFlags.RawBuffer | additionalFlags, PixelFormat.R32_Typeless, data, sizeof(float), usage));
}
/// <summary>
/// Creates argument buffer description.
/// </summary>
/// <param name="data">The initial data.</param>
/// <param name="size">The size (in bytes).</param>
/// <param name="usage">The usage.</param>
/// <returns>The buffer description.</returns>
public static GPUBufferDescription Argument(IntPtr data, int size, GPUResourceUsage usage = GPUResourceUsage.Default)
{
return(Buffer(size, GPUBufferFlags.Argument, PixelFormat.Unknown, data, 0, usage));
}
/// <summary>
/// Creates index buffer description.
/// </summary>
/// <param name="elementStride">The element stride.</param>
/// <param name="elementsCount">The elements count.</param>
/// <param name="usage">The usage mode.</param>
/// <returns>The buffer description.</returns>
public static GPUBufferDescription Index(int elementStride, int elementsCount, GPUResourceUsage usage = GPUResourceUsage.Default)
{
var format = elementStride == 4 ? PixelFormat.R32_UInt : PixelFormat.R16_UInt;
return(Buffer(elementsCount * elementStride, GPUBufferFlags.IndexBuffer, format, new IntPtr(), elementStride, usage));
}
/// <summary>
/// Creates vertex buffer description.
/// </summary>
/// <param name="size">The size (in bytes).</param>
/// <param name="usage">The usage mode.</param>
/// <returns>The buffer description.</returns>
public static GPUBufferDescription Vertex(int size, GPUResourceUsage usage = GPUResourceUsage.Default)
{
return(Buffer(size, GPUBufferFlags.VertexBuffer, PixelFormat.Unknown, new IntPtr(), 0, usage));
}
/// <summary>
/// Creates vertex buffer description.
/// </summary>
/// <param name="elementStride">The element stride.</param>
/// <param name="elementsCount">The elements count.</param>
/// <param name="usage">The usage mode.</param>
/// <returns>The buffer description.</returns>
public static GPUBufferDescription Vertex(int elementStride, int elementsCount, GPUResourceUsage usage = GPUResourceUsage.Default)
{
return(Buffer(elementsCount * elementStride, GPUBufferFlags.VertexBuffer, PixelFormat.Unknown, new IntPtr(), elementStride, usage));
}
