Axiom.RenderSystems.DirectX9.D3DRenderSystem.DetermineFSAASettings C# (CSharp) Метод

        internal void DetermineFSAASettings(Device d3D9Device,
            int fsaa, string fsaaHint, Format d3DPixelFormat,
            bool fullScreen, out MultisampleType outMultisampleType, out int outMultisampleQuality)
        {
            outMultisampleType = MultisampleType.None;
            outMultisampleQuality = 0;

            var ok = false;
            var qualityHint = fsaaHint.Contains("Quality");
            var origFSAA = fsaa;

            var driverList = Direct3DDrivers;
            var deviceDriver = _activeD3DDriver;
            var device = _deviceManager.GetDeviceFromD3D9Device(d3D9Device);

            foreach (var currDriver in driverList)
            {
                if ( currDriver.AdapterNumber != device.AdapterNumber )
                    continue;
                deviceDriver = currDriver;
                break;
            }

            var tryCsaa = false;
            // NVIDIA, prefer CSAA if available for 8+
            // it would be tempting to use getCapabilities()->getVendor() == GPU_NVIDIA but
            // if this is the first window, caps will not be initialised yet
            if (deviceDriver.AdapterIdentifier.VendorId == 0x10DE && 
                fsaa >= 8)
            {
                tryCsaa     = true;
            }
            
            while (!ok)
            {
                // Deal with special cases
                if (tryCsaa)
                {
                    // see http://developer.nvidia.com/object/coverage-sampled-aa.html
                    switch(fsaa)
                    {
                    case 8:
                        if (qualityHint)
                        {
                            outMultisampleType = MultisampleType.EightSamples;
                            outMultisampleQuality = 0;
                        }
                        else
                        {
                            outMultisampleType = MultisampleType.FourSamples;
                            outMultisampleQuality = 2;
                        }
                        break;
                    case 16:
                        if (qualityHint)
                        {
                            outMultisampleType = MultisampleType.EightSamples;
                            outMultisampleQuality = 2;
                        }
                        else
                        {
                            outMultisampleType = MultisampleType.FourSamples;
                            outMultisampleQuality = 4;
                        }
                        break;
                    }
                }
                else // !CSAA
                {
                    outMultisampleType = (MultisampleType)fsaa;
                    outMultisampleQuality = 0;
                }

                int outQuality;
                var hr = _pD3D.CheckDeviceMultisampleType(
                    deviceDriver.AdapterNumber, DeviceType.Hardware, d3DPixelFormat,
                    fullScreen, outMultisampleType, out outQuality );

                if (hr && (!tryCsaa || outQuality > outMultisampleQuality))
                {
                    ok = true;
                }
                else
                {
                    // downgrade
                    if (tryCsaa && fsaa == 8)
                    {
                        // for CSAA, we'll try downgrading with quality mode at all samples.
                        // then try without quality, then drop CSAA
                        if (qualityHint)
                        {
                            // drop quality first
                            qualityHint = false;
                        }
                        else
                        {
                            // drop CSAA entirely 
                            tryCsaa = false;
                        }
                        // return to original requested samples
                        fsaa = origFSAA;
                    }
                    else
                    {
                        // drop samples
                        --fsaa;

                        if (fsaa == 1)
                        {
                            // ran out of options, no FSAA
                            fsaa = 0;
                            ok = true;
                        }
                    }
                }

            } // while !ok
        }