public static D3D11_MAPPED_SUBRESOURCE Map(this ID3D11DeviceContext context, ID3D11Resource resource, int subResource, D3D11_MAP mapType, D3D11_MAP_FLAG mapFlag = 0)
{
if (context == null)
{
throw new ArgumentNullException(nameof(context));
}
if (resource == null)
{
throw new ArgumentNullException(nameof(resource));
}
using (var ptr = new ComMemory(Marshal.SizeOf <D3D11_MAPPED_SUBRESOURCE>()))
{
context.Map(resource, (uint)subResource, mapType, (uint)mapFlag, ptr.Pointer).ThrowOnError();
return(ptr.ToStructure <D3D11_MAPPED_SUBRESOURCE>());
}
}
public static void WithMap <T>(this IComObject <ID3D11DeviceContext> context, IComObject <ID3D11Resource> resource, int subResource, D3D11_MAP mapType, MapAction <T> action, D3D11_MAP_FLAG mapFlag = 0)
{
if (action == null)
{
throw new ArgumentNullException(nameof(action));
}
var map = Map(context, resource, subResource, mapType, mapFlag);
try
{
var structure = Marshal.PtrToStructure <T>(map.pData);
action(ref map, ref structure);
Marshal.StructureToPtr(structure, map.pData, false);
}
finally
{
Unmap(context, resource, subResource);
}
}
public static D3D11_MAPPED_SUBRESOURCE Map(this IComObject <ID3D11DeviceContext> context, IComObject <ID3D11Resource> resource, int subResource, D3D11_MAP mapType, D3D11_MAP_FLAG mapFlag = 0) => Map(context?.Object, resource?.Object, subResource, mapType, mapFlag);