private void CheckMultiSamplingSupport()
{
D3D12_FEATURE_DATA_MULTISAMPLE_QUALITY_LEVELS msaa = default;
msaa.Format = DXGI_FORMAT_B8G8R8A8_UNORM;
msaa.SampleCount = MsaaCount;
ThrowIfFailed(nameof(ID3D12Device.CheckFeatureSupport), _device->CheckFeatureSupport(D3D12_FEATURE_MULTISAMPLE_QUALITY_LEVELS, &msaa, (uint)sizeof(D3D12_FEATURE_DATA_MULTISAMPLE_QUALITY_LEVELS)));
if (msaa.NumQualityLevels == 0)
{
throw new PlatformNotSupportedException($"{msaa.SampleCount}x MSAA is not supported on your system");
}
// CheckFeatureSupport returns the number of quality levels
// The max level is one less than the number of levels
// It is common to have 1 quality level, so _msaaQuality is 0. This can be confusing, but just means the lowest quality setting,
// rather than meaning not supported
// There are 2 special values for quality levels
// * -1 means all samples should be evenly distributed among the pixel
// * -2 means all samples should be in the centre of the pixel
_msaaDesc = new DXGI_SAMPLE_DESC(count: MsaaCount, quality: msaa.NumQualityLevels - 1);
}
public HelloMultiSampling12(string name) : base(name)
{
_msaaRenderTargets = new ID3D12Resource *[2];
_msaaDesc = new DXGI_SAMPLE_DESC(2, DXGI_STANDARD_MULTISAMPLE_QUALITY_PATTERN);
}
