Added new RHI abstraction layer;

Added new console debug page to UnitTest;

Ghost.Graphics/RHI/ICommandBuffer.cs

@@ -0,0 +1,147 @@
+using Ghost.Graphics.Data;
+
+namespace Ghost.Graphics.RHI;
+
+/// <summary>
+/// D3D12-style command buffer interface for recording rendering commands
+/// </summary>
+public interface ICommandBuffer : IDisposable
+{
+    /// <summary>
+    /// Begins recording commands into this command buffer
+    /// </summary>
+    void Begin();
+
+    /// <summary>
+    /// Ends recording commands and prepares for submission
+    /// </summary>
+    void End();
+
+    /// <summary>
+    /// Begins a render pass with the specified render target
+    /// </summary>
+    /// <param name="renderTarget">Render target to render into</param>
+    /// <param name="clearColor">Color to clear the render target with</param>
+    void BeginRenderPass(IRenderTarget renderTarget, Color128 clearColor);
+
+    /// <summary>
+    /// Ends the current render pass
+    /// </summary>
+    void EndRenderPass();
+
+    /// <summary>
+    /// Sets the viewport for rendering
+    /// </summary>
+    /// <param name="viewport">Viewport to set</param>
+    void SetViewport(ViewportDesc viewport);
+
+    /// <summary>
+    /// Sets the scissor rectangle
+    /// </summary>
+    /// <param name="rect">Scissor rectangle to set</param>
+    void SetScissorRect(RectDesc rect);
+
+    /// <summary>
+    /// Inserts a resource barrier for state transitions
+    /// </summary>
+    /// <param name="resource">Resource to transition</param>
+    /// <param name="before">Current resource state</param>
+    /// <param name="after">Target resource state</param>
+    void ResourceBarrier(IResource resource, ResourceState before, ResourceState after);
+
+    /// <summary>
+    /// Sets the graphics root signature
+    /// </summary>
+    /// <param name="rootSignature">Root signature to set</param>
+    void SetGraphicsRootSignature(IRootSignature rootSignature);
+
+    /// <summary>
+    /// Sets the pipeline state object
+    /// </summary>
+    /// <param name="pipelineState">Pipeline state to set</param>
+    void SetPipelineState(IPipelineState pipelineState);
+
+    /// <summary>
+    /// Sets descriptor heaps for bindless rendering
+    /// </summary>
+    /// <param name="heaps">Descriptor heaps to set</param>
+    void SetDescriptorHeaps(IDescriptorHeap[] heaps);
+
+    /// <summary>
+    /// Draws indexed geometry
+    /// </summary>
+    /// <param name="indexCount">Number of indices to draw</param>
+    /// <param name="instanceCount">Number of instances to draw</param>
+    /// <param name="startIndex">Starting index location</param>
+    /// <param name="baseVertex">Base vertex location</param>
+    /// <param name="startInstance">Starting instance location</param>
+    void DrawIndexedInstanced(uint indexCount, uint instanceCount = 1, uint startIndex = 0, int baseVertex = 0, uint startInstance = 0);
+
+    /// <summary>
+    /// Dispatches compute threads
+    /// </summary>
+    /// <param name="threadGroupCountX">Thread groups in X dimension</param>
+    /// <param name="threadGroupCountY">Thread groups in Y dimension</param>
+    /// <param name="threadGroupCountZ">Thread groups in Z dimension</param>
+    void Dispatch(uint threadGroupCountX, uint threadGroupCountY = 1, uint threadGroupCountZ = 1);
+}
+
+/// <summary>
+/// Viewport description
+/// </summary>
+public struct ViewportDesc
+{
+    public float X;
+    public float Y;
+    public float Width;
+    public float Height;
+    public float MinDepth;
+    public float MaxDepth;
+
+    public ViewportDesc(float width, float height)
+    {
+        X = 0;
+        Y = 0;
+        Width = width;
+        Height = height;
+        MinDepth = 0.0f;
+        MaxDepth = 1.0f;
+    }
+}
+
+/// <summary>
+/// Rectangle description
+/// </summary>
+public struct RectDesc
+{
+    public int Left;
+    public int Top;
+    public int Right;
+    public int Bottom;
+
+    public RectDesc(int left, int top, int right, int bottom)
+    {
+        Left = left;
+        Top = top;
+        Right = right;
+        Bottom = bottom;
+    }
+}
+
+/// <summary>
+/// D3D12-style resource states
+/// </summary>
+public enum ResourceState
+{
+    Common = 0,
+    VertexAndConstantBuffer = 0x1,
+    IndexBuffer = 0x2,
+    RenderTarget = 0x4,
+    UnorderedAccess = 0x8,
+    DepthWrite = 0x10,
+    DepthRead = 0x20,
+    PixelShaderResource = 0x80,
+    CopyDest = 0x400,
+    CopySource = 0x800,
+    Present = 0
+}