Updated D3D12Renderer for testing.

Ghost.Graphics/RHI/IResourceDatabase.cs

@@ -25,17 +25,23 @@ public interface IResourceDatabase
         where T : unmanaged;
     */
 
+    /// <summary>
+    /// Checks if a resource with the specified handle exists in the database.
+    /// </summary>
+    /// <param name="handle">The handle of the resource to check for existence.</param>
+    bool HasResource(Handle<GPUResource> handle);
+
     /// <summary>
     /// Retrieves the current state of the specified resource.
     /// </summary>
-    /// <param name="handle">The handle that uniquely identifies the resource whose state is to be retrieved. Must not be null.</param>
+    /// <param name="handle">The handle that uniquely identifies the resource whose state is to be retrieved.</param>
     /// <returns>A ResourceState value representing the current state of the resource associated with the specified handle.</returns>
     ResourceState GetResourceState(Handle<GPUResource> handle);
 
     /// <summary>
     /// Sets the state of the specified resource handle to the given value.
     /// </summary>
-    /// <param name="handle">The handle that identifies the resource whose state will be updated. Cannot be null.</param>
+    /// <param name="handle">The handle that identifies the resource whose state will be updated.</param>
     /// <param name="state">The new state to assign to the resource represented by <paramref name="handle"/>.</param>
     void SetResourceState(Handle<GPUResource> handle, ResourceState state);
 
@@ -163,4 +169,4 @@ public interface IResourceDatabase
     /// <param name="passKey">The unique identifier of the shader pass to retrieve.</param>
     /// <returns>The <see cref="ShaderPass"/> corresponding to the specified identifier, or null if no matching shader pass is found.</returns>
     ShaderPass GetShaderPass(ShaderPassKey passKey);
-}
+}