Refactor pipeline state and render output abstractions

- Replace old pipeline enums/structs with new strongly-typed PipelineState and enums (ZTest, ZWrite, Cull, Blend, ColorWriteMask)
- Redesign pipeline keying: introduce 128-bit GraphicsPipelineKey, MaterialPipelineKey, and PassPipelineKey for robust PSO caching
- Replace IRenderTargetStrategy with IRenderOutput; add SwapChainRenderOutput and TextureRenderOutput
- Update renderer and window code to use new render output abstraction and handle viewport/scissor updates
- Make ShaderPass a readonly struct and Shader a struct; use ID-based pass lookup for efficiency
- Materials now support per-pass pipeline overrides with new keying
- Add defensive checks in D3D12CommandBuffer; update D3D12PipelineLibrary for new keying/state
- Move test shader to test.gsdef and update for new pipeline state syntax
- Remove obsolete files/interfaces and perform general code cleanups
- Update all usages and parsing logic for new pipeline state system

Ghost.Core/Graphics/PipelineState.cs

@@ -0,0 +1,84 @@
+namespace Ghost.Core.Graphics;
+
+public enum ZTest
+{
+    Disabled,
+    Less,
+    LessEqual,
+    Equal,
+    GreaterEqual,
+    Greater,
+    NotEqual,
+    Always
+}
+
+public enum ZWrite
+{
+    Off,
+    On
+}
+
+public enum Cull
+{
+    Off,
+    Front,
+    Back
+}
+
+public enum Blend
+{
+    Opaque,
+    Alpha,
+    Additive,
+    Multiply,
+    PremultipliedAlpha
+}
+
+[Flags]
+public enum ColorWriteMask
+{
+    None = 0,
+    Red = 1 << 0,
+    Green = 1 << 1,
+    Blue = 1 << 2,
+    Alpha = 1 << 3,
+    All = Red | Green | Blue | Alpha
+}
+
+public struct PipelineState
+{
+    public ZTest ZTest
+    {
+        get; set;
+    }
+
+    public ZWrite ZWrite
+    {
+        get; set;
+    }
+
+    public Cull Cull
+    {
+        get; set;
+    }
+
+    public Blend Blend
+    {
+        get; set;
+    }
+
+    public ColorWriteMask ColorMask
+    {
+        get; set;
+    }
+
+
+    public static PipelineState Default => new PipelineState
+    {
+        ZTest = ZTest.LessEqual,
+        ZWrite = ZWrite.On,
+        Cull = Cull.Back,
+        Blend = Blend.Opaque,
+        ColorMask = ColorWriteMask.All
+    };
+}

Ghost.Core/Graphics/PsoOptions.cs

@@ -1,35 +0,0 @@
-namespace Ghost.Core.Graphics;
-
-public enum ZTestOptions
-{
-    Disabled,
-    Less,
-    LessEqual,
-    Equal,
-    GreaterEqual,
-    Greater,
-    NotEqual,
-    Always
-}
-
-public enum ZWriteOptions
-{
-    Off,
-    On
-}
-
-public enum CullOptions
-{
-    Off,
-    Front,
-    Back
-}
-
-public enum BlendOptions
-{
-    Opaque,
-    Alpha,
-    Additive,
-    Multiply,
-    PremultipliedAlpha
-}

Ghost.Core/Graphics/ShaderDescriptor.cs

@@ -33,24 +33,6 @@ public struct KeywordsGroup
     public List<string>? keywords;
 }
 
-public struct PipelineDescriptor
-{
-    public ZTestOptions zTest;
-    public ZWriteOptions zWrite;
-    public CullOptions cull;
-    public BlendOptions blend;
-    public uint colorMask;
-
-    public static PipelineDescriptor Default = new PipelineDescriptor
-    {
-        zTest = ZTestOptions.LessEqual,
-        zWrite = ZWriteOptions.On,
-        cull = CullOptions.Back,
-        blend = BlendOptions.Opaque,
-        colorMask = 0
-    };
-}
-
 public interface IPassDescriptor
 {
     public string Identifier
@@ -81,7 +63,7 @@ public class FullPassDescriptor : IPassDescriptor
     public ShaderEntryPoint pixelShader;
     public List<string>? defines;
     public List<KeywordsGroup>? keywords;
-    public PipelineDescriptor localPipeline;
+    public PipelineState localPipeline;
 
     public string Identifier => uniqueIdentifier;
     public string Name => name;