fix(OpenGL): 修复工厂方法返回 nullptr 的问题

- OpenGLDevice::CreateBuffer 现在创建并返回 OpenGLBuffer 对象
- OpenGLDevice::CreateTexture 现在创建并返回 OpenGLTexture 对象
- OpenGLDevice::CreateSwapChain 现在创建并返回 OpenGLSwapChain 对象
- OpenGLDevice::CreateCommandList 现在创建并返回 OpenGLCommandList 对象
- OpenGLDevice::CreateCommandQueue 现在创建并返回 OpenGLCommandQueue 对象
- OpenGLDevice::CompileShader 现在创建并返回 OpenGLShader 对象
- OpenGLDevice::CreatePipelineState 现在创建并返回 OpenGLPipelineState 对象
- OpenGLDevice::CreateFence 现在创建并返回 OpenGLFence 对象
- OpenGLDevice::CreateSampler 现在创建并返回 OpenGLSampler 对象

engine/src/RHI/OpenGL/OpenGLDevice.cpp

@@ -1,5 +1,14 @@
 #define GLFW_INCLUDE_NONE
 #include "XCEngine/RHI/OpenGL/OpenGLDevice.h"
+#include "XCEngine/RHI/OpenGL/OpenGLBuffer.h"
+#include "XCEngine/RHI/OpenGL/OpenGLTexture.h"
+#include "XCEngine/RHI/OpenGL/OpenGLShader.h"
+#include "XCEngine/RHI/OpenGL/OpenGLPipelineState.h"
+#include "XCEngine/RHI/OpenGL/OpenGLFence.h"
+#include "XCEngine/RHI/OpenGL/OpenGLSampler.h"
+#include "XCEngine/RHI/OpenGL/OpenGLCommandList.h"
+#include "XCEngine/RHI/OpenGL/OpenGLCommandQueue.h"
+#include "XCEngine/RHI/OpenGL/OpenGLSwapChain.h"
 #include <glad/glad.h>
 #include <GLFW/glfw3.h>
 
@@ -124,39 +133,93 @@ bool OpenGLDevice::ShouldClose() const {
 }
 
 RHIBuffer* OpenGLDevice::CreateBuffer(const BufferDesc& desc) {
-    return nullptr;
+    auto* buffer = new OpenGLBuffer();
+    OpenGLBufferType bufferType = OpenGLBufferType::Vertex;
+    
+    switch (desc.usage) {
+        case ResourceUsage::IndexBuffer:
+            bufferType = OpenGLBufferType::Index;
+            break;
+        case ResourceUsage::ConstantBuffer:
+            bufferType = OpenGLBufferType::Uniform;
+            break;
+        default:
+            bufferType = OpenGLBufferType::Vertex;
+            break;
+    }
+    
+    buffer->Initialize(bufferType, desc.size, nullptr, desc.cpuAccess == CPUAccess::Write);
+    return buffer;
 }
 
 RHITexture* OpenGLDevice::CreateTexture(const TextureDesc& desc) {
-    return nullptr;
+    auto* texture = new OpenGLTexture();
+    
+    OpenGLTextureType type = OpenGLTextureType::Texture2D;
+    switch (desc.type) {
+        case TextureType::Texture1D:
+            type = OpenGLTextureType::Texture1D;
+            break;
+        case TextureType::Texture3D:
+            type = OpenGLTextureType::Texture3D;
+            break;
+        case TextureType::TextureCube:
+            type = OpenGLTextureType::TextureCube;
+            break;
+        default:
+            type = OpenGLTextureType::Texture2D;
+            break;
+    }
+    
+    OpenGLFormat format = OpenGLFormat::RGBA8;
+    texture->Initialize(type, desc.width, desc.height, desc.depth, desc.mipLevels, format, nullptr);
+    return texture;
 }
 
 RHISwapChain* OpenGLDevice::CreateSwapChain(const SwapChainDesc& desc) {
-    return nullptr;
+    auto* swapChain = new OpenGLSwapChain();
+    if (m_window) {
+        swapChain->Initialize(m_window, desc.width, desc.height);
+    }
+    return swapChain;
 }
 
 RHICommandList* OpenGLDevice::CreateCommandList(const CommandListDesc& desc) {
-    return nullptr;
+    auto* cmdList = new OpenGLCommandList();
+    return cmdList;
 }
 
 RHICommandQueue* OpenGLDevice::CreateCommandQueue(const CommandQueueDesc& desc) {
-    return nullptr;
+    auto* queue = new OpenGLCommandQueue();
+    return queue;
 }
 
 RHIShader* OpenGLDevice::CompileShader(const ShaderCompileDesc& desc) {
-    return nullptr;
+    auto* shader = new OpenGLShader();
+    if (desc.sourceData && desc.sourceSize > 0) {
+        shader->Compile(static_cast<const char*>(desc.sourceData), desc.sourceSize);
+    } else if (desc.filePath) {
+        shader->CompileFromFile(desc.filePath);
+    }
+    return shader;
 }
 
 RHIPipelineState* OpenGLDevice::CreatePipelineState(const PipelineStateDesc& desc) {
-    return nullptr;
+    auto* pso = new OpenGLPipelineState();
+    return pso;
 }
 
 RHIFence* OpenGLDevice::CreateFence(const FenceDesc& desc) {
-    return nullptr;
+    auto* fence = new OpenGLFence();
+    fence->Initialize(desc.initialValue > 0);
+    return fence;
 }
 
 RHISampler* OpenGLDevice::CreateSampler(const SamplerDesc& desc) {
-    return nullptr;
+    auto* sampler = new OpenGLSampler();
+    OpenGLSamplerDesc samplerDesc = {};
+    sampler->Initialize(samplerDesc);
+    return sampler;
 }
 
 const RHICapabilities& OpenGLDevice::GetCapabilities() const {