public static ResourceFlags Convert(TextureUsage usage, PixelFormat format)
{
var flags = ResourceFlags.None;
if ((usage & TextureUsage.ShaderRead) == 0)
{
flags |= ResourceFlags.DenyShaderResource;
}
if ((usage & TextureUsage.ShaderWrite) != 0)
{
flags |= ResourceFlags.AllowUnorderedAccess;
}
if ((usage & TextureUsage.RenderTarget) != 0)
{
if (!PixelFormatUtil.IsDepthStencilFormat(format))
{
flags |= ResourceFlags.AllowRenderTarget;
}
else
{
flags |= ResourceFlags.AllowDepthStencil;
}
}
return(flags);
}
public static BindFlags ToDirectX(this TextureUsage usage, PixelFormat format)
{
var bindFlags = BindFlags.None;
if ((usage & TextureUsage.ShaderRead) != 0)
{
bindFlags |= BindFlags.ShaderResource;
}
if ((usage & TextureUsage.ShaderWrite) != 0)
{
bindFlags |= BindFlags.UnorderedAccess;
}
if ((usage & TextureUsage.RenderTarget) != 0)
{
if (!PixelFormatUtil.IsDepthStencilFormat(format))
{
bindFlags |= BindFlags.RenderTarget;
}
else
{
bindFlags |= BindFlags.DepthStencil;
}
}
return(bindFlags);
}
public TextureViewD3D11(DeviceD3D11 device, TextureD3D11 texture, TextureViewDescriptor descriptor)
: base(texture, descriptor)
{
Device = device;
if ((texture.Usage & TextureUsage.RenderTarget) != TextureUsage.None)
{
// TODO: Use TextureViewDescriptor
if (!PixelFormatUtil.IsDepthStencilFormat(descriptor.Format))
{
RenderTargetView = device.D3D11Device.CreateRenderTargetView(texture);
}
else
{
DepthStencilView = device.D3D11Device.CreateDepthStencilView(texture);
}
}
}
public TextureD3D12(
D3D12GraphicsDevice device,
ref TextureDescriptor descriptor,
ID3D12Resource nativeTexture)
: base(device, ref descriptor)
{
DXGIFormat = descriptor.Format.ToDirectX();
if (nativeTexture == null)
{
ResourceFlags resourceFlags = ResourceFlags.None;
if ((descriptor.Usage & TextureUsage.ShaderWrite) != 0)
{
resourceFlags |= ResourceFlags.AllowUnorderedAccess;
}
// A multisampled resource must have either D3D12_RESOURCE_FLAG_ALLOW_RENDER_TARGET or
// D3D12_RESOURCE_FLAG_ALLOW_DEPTH_STENCIL set in D3D12_RESOURCE_DESC::Flags.
if ((descriptor.Usage & TextureUsage.RenderTarget) != 0 ||
descriptor.Samples > 0 ||
!PixelFormatUtil.IsCompressed(descriptor.Format))
{
if (PixelFormatUtil.IsDepthStencilFormat(descriptor.Format))
{
if ((descriptor.Usage & TextureUsage.ShaderRead) == 0)
{
resourceFlags |= ResourceFlags.DenyShaderResource;
}
resourceFlags |= ResourceFlags.AllowDepthStencil;
}
else
{
resourceFlags |= ResourceFlags.AllowRenderTarget;
}
}
}
else
{
Resource = nativeTexture;
}
}
