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Packages/com.omarator.mosissdk/Plugins/Android/cpp/vulkan_backend.h

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+#pragma once
+
+#include "texture_backend.h"
+#include <vulkan/vulkan.h>
+#include <vulkan/vulkan_android.h>
+#include <IUnityGraphicsVulkan.h>
+
+/**
+ * Vulkan implementation of ITextureBackend.
+ * Imports AHardwareBuffer via VK_ANDROID_external_memory_android_hardware_buffer
+ * and copies to a local VkImage for safe rendering.
+ */
+class VulkanTextureBackend : public ITextureBackend
+{
+public:
+    VulkanTextureBackend() = default;
+    ~VulkanTextureBackend() override { Destroy(); }
+
+    /**
+     * Initialize the Vulkan backend with Unity's Vulkan interface.
+     * Must be called during UnityPluginLoad.
+     * @param unityInterfaces Unity's interface registry
+     * @return true if Vulkan is available and initialization succeeded
+     */
+    bool Initialize(IUnityInterfaces* unityInterfaces);
+
+    bool Create(AHardwareBuffer* buffer) override;
+    void Update() override;
+    void Destroy() override;
+    void* GetNativeTexturePtr() override;
+    int GetWidth() const override { return m_Width; }
+    int GetHeight() const override { return m_Height; }
+    bool IsVulkan() const override { return true; }
+
+    /**
+     * Get the VkImageView for Unity texture binding.
+     */
+    VkImageView GetLocalImageView() const { return m_LocalImageView; }
+
+private:
+    bool ImportHardwareBuffer(AHardwareBuffer* buffer);
+    bool CreateLocalImage();
+    void DestroyImportedResources();
+    void DestroyLocalResources();
+    uint32_t FindMemoryType(uint32_t typeFilter, VkMemoryPropertyFlags properties);
+    void TransitionImageLayout(VkImage image, VkImageLayout oldLayout, VkImageLayout newLayout);
+    void CopyImage();
+
+    // Unity Vulkan interface
+    IUnityGraphicsVulkan* m_UnityVulkan = nullptr;
+
+    // Vulkan device objects (from Unity)
+    VkInstance m_Instance = VK_NULL_HANDLE;
+    VkPhysicalDevice m_PhysicalDevice = VK_NULL_HANDLE;
+    VkDevice m_Device = VK_NULL_HANDLE;
+    VkQueue m_Queue = VK_NULL_HANDLE;
+    uint32_t m_QueueFamilyIndex = 0;
+
+    // Command pool for copy operations
+    VkCommandPool m_CommandPool = VK_NULL_HANDLE;
+    VkCommandBuffer m_CommandBuffer = VK_NULL_HANDLE;
+
+    // Imported hardware buffer resources
+    VkImage m_ImportedImage = VK_NULL_HANDLE;
+    VkDeviceMemory m_ImportedMemory = VK_NULL_HANDLE;
+
+    // Local copy resources (for safe rendering)
+    VkImage m_LocalImage = VK_NULL_HANDLE;
+    VkDeviceMemory m_LocalMemory = VK_NULL_HANDLE;
+    VkImageView m_LocalImageView = VK_NULL_HANDLE;
+
+    // Texture format info
+    VkFormat m_Format = VK_FORMAT_R8G8B8A8_UNORM;
+    int m_Width = 0;
+    int m_Height = 0;
+
+    bool m_Initialized = false;
+    bool m_Created = false;
+
+    // Extension function pointers
+    PFN_vkGetAndroidHardwareBufferPropertiesANDROID vkGetAndroidHardwareBufferPropertiesANDROID = nullptr;
+};