public static SystemParameters Create()
{
var(width, height, _) = GetDisplays().First(d => d.IsPrimary);
/*using var f = new SharpDX.DXGI.Factory1();
* var video_memory = f.Adapters1.Select(a =>
* Math.Max(a.Description.DedicatedSystemMemory, (long)a.Description.DedicatedVideoMemory)).Max();*/
var dxgiMemory = 0UL;
unsafe
{
using var api = DXGI.GetApi();
IDXGIFactory1 *factory1 = default;
try
{
//https://docs.microsoft.com/en-us/windows/win32/api/dxgi/nf-dxgi-createdxgifactory1
SilkMarshal.ThrowHResult(api.CreateDXGIFactory1(SilkMarshal.GuidPtrOf <IDXGIFactory1>(), (void **)&factory1));
uint i = 0u;
while (true)
{
IDXGIAdapter1 *adapter1 = default;
//https://docs.microsoft.com/en-us/windows/win32/api/dxgi/nf-dxgi-idxgifactory1-enumadapters1
var res = factory1->EnumAdapters1(i, &adapter1);
var exception = Marshal.GetExceptionForHR(res);
if (exception != null)
{
break;
}
AdapterDesc1 adapterDesc = default;
//https://docs.microsoft.com/en-us/windows/win32/api/dxgi/nf-dxgi-idxgiadapter1-getdesc1
SilkMarshal.ThrowHResult(adapter1->GetDesc1(&adapterDesc));
var systemMemory = (ulong)adapterDesc.DedicatedSystemMemory;
var videoMemory = (ulong)adapterDesc.DedicatedVideoMemory;
var maxMemory = Math.Max(systemMemory, videoMemory);
if (maxMemory > dxgiMemory)
{
dxgiMemory = maxMemory;
}
adapter1->Release();
i++;
}
}
catch (Exception e)
{
Utils.ErrorThrow(e);
}
finally
{
if (factory1->LpVtbl != (void **)IntPtr.Zero)
{
factory1->Release();
}
}
}
var memory = Utils.GetMemoryStatus();
return(new SystemParameters
{
ScreenWidth = width,
ScreenHeight = height,
VideoMemorySize = (long)dxgiMemory,
SystemMemorySize = (long)memory.ullTotalPhys,
SystemPageSize = (long)memory.ullTotalPageFile - (long)memory.ullTotalPhys
});
}