Added new RHI abstraction layer;

Added new console debug page to UnitTest;

Ghost.Graphics/RHI/IRenderTypes.cs

@@ -0,0 +1,199 @@
+namespace Ghost.Graphics.RHI;
+
+/// <summary>
+/// Pipeline state object interface
+/// </summary>
+public interface IPipelineState : IDisposable
+{
+    /// <summary>
+    /// Pipeline type (graphics or compute)
+    /// </summary>
+    PipelineType Type
+    {
+        get;
+    }
+
+    /// <summary>
+    /// Pipeline name for debugging
+    /// </summary>
+    string Name
+    {
+        get; set;
+    }
+}
+
+/// <summary>
+/// Root signature interface
+/// </summary>
+public interface IRootSignature : IDisposable
+{
+    /// <summary>
+    /// Root signature name for debugging
+    /// </summary>
+    string Name
+    {
+        get; set;
+    }
+}
+
+/// <summary>
+/// Pipeline types
+/// </summary>
+public enum PipelineType
+{
+    Graphics,
+    Compute
+}
+
+/// <summary>
+/// Render target description
+/// Supports either color OR depth rendering, not both
+/// </summary>
+public struct RenderTargetDesc
+{
+    /// <summary>
+    /// Width of the render target
+    /// </summary>
+    public uint Width;
+
+    /// <summary>
+    /// Height of the render target
+    /// </summary>
+    public uint Height;
+
+    /// <summary>
+    /// Type of render target (color or depth)
+    /// </summary>
+    public RenderTargetType Type;
+
+    /// <summary>
+    /// Target texture format
+    /// </summary>
+    public TextureFormat Format;
+
+    /// <summary>
+    /// Number of samples for MSAA
+    /// </summary>
+    public uint SampleCount;
+
+    /// <summary>
+    /// Creates a color render target
+    /// </summary>
+    public static RenderTargetDesc Color(uint width, uint height, TextureFormat format, uint sampleCount = 1)
+    {
+        return new RenderTargetDesc
+        {
+            Width = width,
+            Height = height,
+            Type = RenderTargetType.Color,
+            Format = format,
+            SampleCount = sampleCount
+        };
+    }
+
+    /// <summary>
+    /// Creates a depth render target
+    /// </summary>
+    public static RenderTargetDesc Depth(uint width, uint height, TextureFormat format = TextureFormat.D24_UNorm_S8_UInt, uint sampleCount = 1)
+    {
+        return new RenderTargetDesc
+        {
+            Width = width,
+            Height = height,
+            Type = RenderTargetType.Depth,
+            Format = format,
+            SampleCount = sampleCount
+        };
+    }
+}
+
+/// <summary>
+/// Texture description
+/// </summary>
+public struct TextureDesc
+{
+    /// <summary>
+    /// Width of the texture
+    /// </summary>
+    public uint Width;
+
+    /// <summary>
+    /// Height of the texture
+    /// </summary>
+    public uint Height;
+
+    /// <summary>
+    /// Texture format
+    /// </summary>
+    public TextureFormat Format;
+
+    /// <summary>
+    /// Number of mip levels
+    /// </summary>
+    public uint MipLevels;
+
+    /// <summary>
+    /// Texture usage flags
+    /// </summary>
+    public TextureUsage Usage;
+
+    public TextureDesc(uint width, uint height, TextureFormat format, uint mipLevels = 1, TextureUsage usage = TextureUsage.ShaderResource)
+    {
+        Width = width;
+        Height = height;
+        Format = format;
+        MipLevels = mipLevels;
+        Usage = usage;
+    }
+}
+
+/// <summary>
+/// Buffer description
+/// </summary>
+public struct BufferDesc
+{
+    /// <summary>
+    /// Size of the buffer in bytes
+    /// </summary>
+    public ulong Size;
+
+    /// <summary>
+    /// Buffer usage flags
+    /// </summary>
+    public BufferUsage Usage;
+
+    /// <summary>
+    /// Memory type for the buffer
+    /// </summary>
+    public MemoryType MemoryType;
+
+    public BufferDesc(ulong size, BufferUsage usage, MemoryType memoryType = MemoryType.Default)
+    {
+        Size = size;
+        Usage = usage;
+        MemoryType = memoryType;
+    }
+}
+
+/// <summary>
+/// Texture usage flags
+/// </summary>
+[Flags]
+public enum TextureUsage
+{
+    None = 0,
+    ShaderResource = 1 << 0,
+    RenderTarget = 1 << 1,
+    DepthStencil = 1 << 2,
+    UnorderedAccess = 1 << 3
+}
+
+/// <summary>
+/// Memory types for resources
+/// </summary>
+public enum MemoryType
+{
+    Default,    // GPU memory
+    Upload,     // CPU-to-GPU memory
+    Readback    // GPU-to-CPU memory
+}