SavedDeviceState.cs

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using System.Runtime.InteropServices;
 
namespace Microsoft.Xna.Framework.Graphics;
 
internal class SavedDeviceState
{
    private GraphicsDevice device;
 
    private VertexBufferBinding[] vertexBuffers;
 
    private IndexBuffer indices;
 
    private Texture[] textures;
 
    private SamplerState[] samplerStates;
 
    private Texture[] vertexTextures;
 
    private SamplerState[] vertexSamplerStates;
 
    private BlendState blendState;
 
    private Color blendFactor;
 
    private int multiSampleMask;
 
    private DepthStencilState depthStencilState;
 
    private int referenceStencil;
 
    private RasterizerState rasterizerState;
 
    private Viewport? viewport;
 
    private Rectangle? scissorRectangle;
 
    public SavedDeviceState(GraphicsDevice device, [MarshalAs(UnmanagedType.U1)] bool saveViewport)
    {
        this.device = device;
        base._002Ector();
        vertexBuffers = device.GetVertexBuffers();
        indices = device.Indices;
        int maxSamplers = device._profileCapabilities.MaxSamplers;
        textures = new Texture[maxSamplers];
        samplerStates = new SamplerState[maxSamplers];
        int num = 0;
        if (0 < maxSamplers)
        {
            do
            {
                textures[num] = device.Textures[num];
                samplerStates[num] = device.SamplerStates[num];
                num++;
            }
            while (num < maxSamplers);
        }
        int maxVertexSamplers = device._profileCapabilities.MaxVertexSamplers;
        vertexTextures = new Texture[maxVertexSamplers];
        vertexSamplerStates = new SamplerState[maxVertexSamplers];
        int num2 = 0;
        if (0 < maxVertexSamplers)
        {
            do
            {
                vertexTextures[num2] = device.VertexTextures[num2];
                vertexSamplerStates[num2] = device.VertexSamplerStates[num2];
                num2++;
            }
            while (num2 < maxVertexSamplers);
        }
        blendState = device.BlendState;
        Color color = device.BlendFactor;
        blendFactor = color;
        multiSampleMask = device.MultiSampleMask;
        depthStencilState = device.DepthStencilState;
        referenceStencil = device.ReferenceStencil;
        rasterizerState = device.RasterizerState;
        if (saveViewport)
        {
            Viewport? viewport = device.Viewport;
            this.viewport = viewport;
            Rectangle? rectangle = device.ScissorRectangle;
            scissorRectangle = rectangle;
        }
    }
 
    public void Restore()
    {
        device.SetVertexBuffers(vertexBuffers);
        device.Indices = indices;
        int num = 0;
        GraphicsDevice graphicsDevice = device;
        if (0 < graphicsDevice._profileCapabilities.MaxSamplers)
        {
            do
            {
                Texture[] array = textures;
                if (array[num] != null)
                {
                    graphicsDevice.Textures[num] = array[num];
                }
                SamplerState[] array2 = samplerStates;
                if (array2[num] != null)
                {
                    device.SamplerStates[num] = array2[num];
                }
                num++;
                graphicsDevice = device;
            }
            while (num < graphicsDevice._profileCapabilities.MaxSamplers);
        }
        int num2 = 0;
        GraphicsDevice graphicsDevice2 = device;
        if (0 < graphicsDevice2._profileCapabilities.MaxVertexSamplers)
        {
            do
            {
                Texture[] array3 = vertexTextures;
                if (array3[num2] != null)
                {
                    graphicsDevice2.VertexTextures[num2] = array3[num2];
                }
                SamplerState[] array4 = vertexSamplerStates;
                if (array4[num2] != null)
                {
                    device.VertexSamplerStates[num2] = array4[num2];
                }
                num2++;
                graphicsDevice2 = device;
            }
            while (num2 < graphicsDevice2._profileCapabilities.MaxVertexSamplers);
        }
        BlendState blendState = this.blendState;
        if (blendState != null)
        {
            device.BlendState = blendState;
            device.BlendFactor = blendFactor;
            device.MultiSampleMask = multiSampleMask;
        }
        DepthStencilState depthStencilState = this.depthStencilState;
        if (depthStencilState != null)
        {
            device.DepthStencilState = depthStencilState;
            device.ReferenceStencil = referenceStencil;
        }
        RasterizerState rasterizerState = this.rasterizerState;
        if (rasterizerState != null)
        {
            device.RasterizerState = rasterizerState;
        }
        if (viewport.HasValue)
        {
            Viewport value = viewport.Value;
            device.Viewport = value;
        }
        if (scissorRectangle.HasValue)
        {
            Rectangle value2 = scissorRectangle.Value;
            device.ScissorRectangle = value2;
        }
    }
}