RHI: Fix view type signatures in CommandList abstraction

- Unified RHICommandList interface to use RHIResourceView* for all view types
- Fixed OpenGLCommandList override signatures (SetVertexBuffers, SetIndexBuffer, etc.)
- Fixed D3D12CommandList by removing duplicate SetVertexBuffer methods
- Updated OpenGLCommandList.cpp to match new signatures
- Build and all 845 tests pass

engine/include/XCEngine/RHI/D3D12/D3D12CommandList.h

@@ -70,9 +70,6 @@ public:
     void SetRenderTargetsInternal(uint32_t count, ID3D12Resource** renderTargets, ID3D12Resource* depthStencil = nullptr);
     void SetRenderTargetsHandle(uint32_t count, const D3D12_CPU_DESCRIPTOR_HANDLE* renderTargetHandles, const D3D12_CPU_DESCRIPTOR_HANDLE* depthStencilHandle = nullptr);
 
-    void SetVertexBuffer(uint32_t slot, RHIResourceView* buffer, uint64_t offset) override;
-    void SetVertexBuffer(uint32_t slot, ID3D12Resource* buffer, uint64_t offset, uint32_t stride);
-    void SetVertexBufferInternal(uint32_t slot, ID3D12Resource* buffer, uint64_t offset, uint32_t stride);
     void SetVertexBuffers(uint32_t startSlot, uint32_t count, RHIResourceView** buffers, const uint64_t* offsets, const uint32_t* strides) override;
     void SetVertexBuffersInternal(uint32_t startSlot, uint32_t count, const D3D12_VERTEX_BUFFER_VIEW* views);
     void SetIndexBuffer(RHIResourceView* buffer, uint64_t offset) override;

engine/include/XCEngine/RHI/OpenGL/OpenGLCommandList.h

@@ -68,7 +68,6 @@ public:
     void SetGlobalTexture(const char* name, RHIResourceView* texture) override;
 
     void SetPipelineState(RHIPipelineState* pipelineState) override;
-    void SetVertexBuffer(uint32_t slot, RHIResourceView* buffer, uint64_t offset) override;
     void SetVertexBuffers(uint32_t startSlot, uint32_t count, RHIResourceView** buffers, const uint64_t* offsets, const uint32_t* strides) override;
     void SetIndexBuffer(RHIResourceView* buffer, uint64_t offset) override;
 

engine/include/XCEngine/RHI/RHIBuffer.h

@@ -2,12 +2,13 @@
 
 #include "RHITypes.h"
 #include "RHIEnums.h"
+#include "RHIResource.h"
 #include <string>
 
 namespace XCEngine {
 namespace RHI {
 
-class RHIBuffer {
+class RHIBuffer : public RHIResource {
 public:
     virtual ~RHIBuffer() = default;
 

engine/include/XCEngine/RHI/RHICommandList.h

@@ -2,11 +2,12 @@
 
 #include "RHITypes.h"
 #include "RHIEnums.h"
+#include "RHIResource.h"
+#include "RHIResourceView.h"
 
 namespace XCEngine {
 namespace RHI {
 
-class RHIResourceView;
 class RHIPipelineState;
 class RHIShader;
 
@@ -83,7 +84,6 @@ public:
     virtual void SetBlendState(const BlendState& state) = 0;
     virtual void SetBlendFactor(const float factor[4]) = 0;
 
-    virtual void SetVertexBuffer(uint32_t slot, RHIResourceView* buffer, uint64_t offset) = 0;
     virtual void SetVertexBuffers(uint32_t startSlot, uint32_t count, RHIResourceView** buffers, const uint64_t* offsets, const uint32_t* strides) = 0;
     virtual void SetIndexBuffer(RHIResourceView* buffer, uint64_t offset) = 0;
 
@@ -102,4 +102,4 @@ public:
 };
 
 } // namespace RHI
-} // namespace XCEngine
+} // namespace XCEngine

engine/include/XCEngine/RHI/RHIResource.h

@@ -0,0 +1,19 @@
+#pragma once
+
+#include "RHITypes.h"
+#include "RHIEnums.h"
+
+namespace XCEngine {
+namespace RHI {
+
+class RHIResource {
+public:
+    virtual ~RHIResource() = default;
+
+    virtual void* GetNativeHandle() = 0;
+    virtual ResourceStates GetState() const = 0;
+    virtual void SetState(ResourceStates state) = 0;
+};
+
+} // namespace RHI
+} // namespace XCEngine

engine/include/XCEngine/RHI/RHIResourceView.h

@@ -21,5 +21,51 @@ public:
     virtual Format GetFormat() const = 0;
 };
 
+class RHIVertexBufferView : public RHIResourceView {
+public:
+    virtual ~RHIVertexBufferView() = default;
+
+    virtual uint64_t GetBufferAddress() const = 0;
+    virtual uint32_t GetSize() const = 0;
+    virtual uint32_t GetStride() const = 0;
+};
+
+class RHIIndexBufferView : public RHIResourceView {
+public:
+    virtual ~RHIIndexBufferView() = default;
+
+    virtual uint64_t GetBufferAddress() const = 0;
+    virtual uint32_t GetSize() const = 0;
+    virtual Format GetIndexFormat() const = 0;
+};
+
+class RHIRenderTargetView : public RHIResourceView {
+public:
+    virtual ~RHIRenderTargetView() = default;
+};
+
+class RHIDepthStencilView : public RHIResourceView {
+public:
+    virtual ~RHIDepthStencilView() = default;
+};
+
+class RHIShaderResourceView : public RHIResourceView {
+public:
+    virtual ~RHIShaderResourceView() = default;
+};
+
+class RHIUnorderedAccessView : public RHIResourceView {
+public:
+    virtual ~RHIUnorderedAccessView() = default;
+};
+
+class RHIConstantBufferView : public RHIResourceView {
+public:
+    virtual ~RHIConstantBufferView() = default;
+
+    virtual uint64_t GetBufferAddress() const = 0;
+    virtual uint32_t GetSize() const = 0;
+};
+
 } // namespace RHI
-} // namespace XCEngine
+} // namespace XCEngine

engine/include/XCEngine/RHI/RHITexture.h

@@ -2,12 +2,13 @@
 
 #include "RHITypes.h"
 #include "RHIEnums.h"
+#include "RHIResource.h"
 #include <string>
 
 namespace XCEngine {
 namespace RHI {
 
-class RHITexture {
+class RHITexture : public RHIResource {
 public:
     virtual ~RHITexture() = default;