initial commit

Sources/VulkanRenderer/VulkanRenderer.swift

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+/// VulkanRenderer - Vulkan rendering backend implementation
+/// This is a PLATFORM-SPECIFIC module (Vulkan API)
+
+import Foundation
+import RendererAPI
+
+// Note: In a real implementation, this would import Vulkan C bindings
+// import CVulkan or similar Swift Vulkan wrapper
+
+/// Vulkan-based renderer implementation
+public final class VulkanRenderer: Renderer, @unchecked Sendable {
+    
+    private var config: RendererConfig?
+    private var isInitialized: Bool = false
+    
+    // Vulkan handles (placeholders - would be actual Vulkan types)
+    private var instance: UnsafeMutableRawPointer?
+    private var device: UnsafeMutableRawPointer?
+    private var physicalDevice: UnsafeMutableRawPointer?
+    private var surface: UnsafeMutableRawPointer?
+    private var swapchain: UnsafeMutableRawPointer?
+    private var commandPool: UnsafeMutableRawPointer?
+    private var graphicsQueue: UnsafeMutableRawPointer?
+    private var presentQueue: UnsafeMutableRawPointer?
+    
+    // Resource storage
+    private var meshes: [MeshHandle: VulkanMesh] = [:]
+    private var textures: [TextureHandle: VulkanTexture] = [:]
+    private var materials: [MaterialHandle: VulkanMaterial] = [:]
+    
+    private var currentFrameIndex: UInt32 = 0
+    private let maxFramesInFlight: UInt32 = 2
+    
+    public init() {
+        print("    🌋 VulkanRenderer created")
+    }
+    
+    // MARK: - Renderer Protocol Implementation
+    
+    public func initialize(config: RendererConfig) async throws {
+        print("    → Initializing Vulkan renderer...")
+        self.config = config
+        
+        // 1. Create Vulkan Instance
+        try createInstance()
+        
+        // 2. Create Surface (from window handle)
+        try createSurface(windowHandle: config.windowHandle)
+        
+        // 3. Pick Physical Device (GPU)
+        try pickPhysicalDevice()
+        
+        // 4. Create Logical Device
+        try createLogicalDevice()
+        
+        // 5. Create Swapchain
+        try createSwapchain(width: config.width, height: config.height, vsync: config.vsyncEnabled)
+        
+        // 6. Create Command Pools and Buffers
+        try createCommandResources()
+        
+        // 7. Create Render Pass
+        try createRenderPass()
+        
+        // 8. Create Framebuffers
+        try createFramebuffers()
+        
+        // 9. Create Graphics Pipeline
+        try createGraphicsPipeline()
+        
+        // 10. Create Descriptor Sets for materials
+        try createDescriptorResources()
+        
+        isInitialized = true
+        print("    ✓ Vulkan renderer initialized")
+    }
+    
+    public func beginFrame() throws {
+        guard isInitialized else { throw RendererError.notInitialized }
+        
+        // Wait for previous frame to finish
+        // Acquire next swapchain image
+        // Begin command buffer recording
+    }
+    
+    public func draw(scene: Scene) throws {
+        guard isInitialized else { throw RendererError.notInitialized }
+        
+        // Begin render pass
+        // Set viewport and scissor
+        // Bind pipeline
+        
+        // Draw each entity
+        for entity in scene.entities {
+            // Set up push constants / uniform buffers
+            // Bind vertex and index buffers
+            // Draw indexed
+            drawEntity(entity, camera: scene.camera)
+        }
+        
+        // End render pass
+    }
+    
+    public func endFrame() throws {
+        guard isInitialized else { throw RendererError.notInitialized }
+        
+        // End command buffer
+        // Submit to graphics queue
+        // Present to swapchain
+        
+        currentFrameIndex = (currentFrameIndex + 1) % maxFramesInFlight
+    }
+    
+    public func shutdown() async {
+        print("    → Shutting down Vulkan renderer...")
+        
+        // Wait for device idle
+        // Destroy all resources in reverse order
+        destroyDescriptorResources()
+        destroyGraphicsPipeline()
+        destroyFramebuffers()
+        destroyRenderPass()
+        destroyCommandResources()
+        destroySwapchain()
+        destroyLogicalDevice()
+        destroySurface()
+        destroyInstance()
+        
+        isInitialized = false
+        print("    ✓ Vulkan renderer shutdown complete")
+    }
+    
+    public func loadMesh(vertices: [Vertex], indices: [UInt32]) async throws -> MeshHandle {
+        let handle = MeshHandle()
+        
+        // Create Vulkan vertex buffer
+        // Create Vulkan index buffer
+        // Upload data to GPU
+        
+        let vulkanMesh = VulkanMesh(
+            vertexBuffer: nil,
+            indexBuffer: nil,
+            vertexCount: UInt32(vertices.count),
+            indexCount: UInt32(indices.count)
+        )
+        
+        meshes[handle] = vulkanMesh
+        return handle
+    }
+    
+    public func loadTexture(data: Data, width: Int, height: Int, format: TextureFormat) async throws -> TextureHandle {
+        let handle = TextureHandle()
+        
+        // Create Vulkan image
+        // Create Vulkan image view
+        // Create Vulkan sampler
+        // Upload texture data
+        
+        let vulkanTexture = VulkanTexture(
+            image: nil,
+            imageView: nil,
+            sampler: nil,
+            width: width,
+            height: height
+        )
+        
+        textures[handle] = vulkanTexture
+        return handle
+    }
+    
+    public func createMaterial(albedoTexture: TextureHandle?, normalTexture: TextureHandle?) async throws -> MaterialHandle {
+        let handle = MaterialHandle()
+        
+        // Create descriptor set for this material
+        // Bind textures to descriptor set
+        
+        let vulkanMaterial = VulkanMaterial(
+            descriptorSet: nil,
+            albedoTexture: albedoTexture,
+            normalTexture: normalTexture
+        )
+        
+        materials[handle] = vulkanMaterial
+        return handle
+    }
+    
+    public var info: RendererInfo {
+        return RendererInfo(
+            apiName: "Vulkan",
+            apiVersion: "1.3",
+            deviceName: "Vulkan Device (placeholder)",
+            maxTextureSize: 16384
+        )
+    }
+    
+    // MARK: - Vulkan-Specific Implementation
+    
+    private func createInstance() throws {
+        print("      • Creating Vulkan instance...")
+        // vkCreateInstance(...) with validation layers in debug
+    }
+    
+    private func createSurface(windowHandle: UnsafeMutableRawPointer?) throws {
+        print("      • Creating Vulkan surface...")
+        // Platform-specific surface creation:
+        // - Linux: vkCreateXlibSurfaceKHR or vkCreateWaylandSurfaceKHR
+        // - Windows: vkCreateWin32SurfaceKHR
+    }
+    
+    private func pickPhysicalDevice() throws {
+        print("      • Selecting physical device...")
+        // vkEnumeratePhysicalDevices
+        // Score devices and pick best one (dedicated GPU preferred)
+    }
+    
+    private func createLogicalDevice() throws {
+        print("      • Creating logical device...")
+        // vkCreateDevice with required extensions and features
+    }
+    
+    private func createSwapchain(width: Int, height: Int, vsync: Bool) throws {
+        print("      • Creating swapchain (\(width)x\(height))...")
+        // vkCreateSwapchainKHR with appropriate format and present mode
+    }
+    
+    private func createCommandResources() throws {
+        print("      • Creating command resources...")
+        // vkCreateCommandPool
+        // vkAllocateCommandBuffers
+    }
+    
+    private func createRenderPass() throws {
+        print("      • Creating render pass...")
+        // vkCreateRenderPass with color and depth attachments
+    }
+    
+    private func createFramebuffers() throws {
+        print("      • Creating framebuffers...")
+        // vkCreateFramebuffer for each swapchain image
+    }
+    
+    private func createGraphicsPipeline() throws {
+        print("      • Creating graphics pipeline...")
+        // Load shaders (SPIR-V)
+        // vkCreateGraphicsPipelines with all state
+    }
+    
+    private func createDescriptorResources() throws {
+        print("      • Creating descriptor resources...")
+        // vkCreateDescriptorSetLayout
+        // vkCreateDescriptorPool
+    }
+    
+    private func drawEntity(_ entity: Entity, camera: Camera) {
+        // Bind mesh
+        // Bind material
+        // Set push constants (MVP matrix)
+        // vkCmdDrawIndexed
+    }
+    
+    // MARK: - Cleanup
+    
+    private func destroyDescriptorResources() {
+        // vkDestroyDescriptorPool
+        // vkDestroyDescriptorSetLayout
+    }
+    
+    private func destroyGraphicsPipeline() {
+        // vkDestroyPipeline
+        // vkDestroyPipelineLayout
+    }
+    
+    private func destroyFramebuffers() {
+        // vkDestroyFramebuffer for each
+    }
+    
+    private func destroyRenderPass() {
+        // vkDestroyRenderPass
+    }
+    
+    private func destroyCommandResources() {
+        // vkFreeCommandBuffers
+        // vkDestroyCommandPool
+    }
+    
+    private func destroySwapchain() {
+        // vkDestroySwapchainKHR
+    }
+    
+    private func destroyLogicalDevice() {
+        // vkDestroyDevice
+    }
+    
+    private func destroySurface() {
+        // vkDestroySurfaceKHR
+    }
+    
+    private func destroyInstance() {
+        // vkDestroyInstance
+    }
+}
+
+// MARK: - Vulkan Resource Types
+
+private struct VulkanMesh {
+    var vertexBuffer: UnsafeMutableRawPointer?
+    var indexBuffer: UnsafeMutableRawPointer?
+    var vertexCount: UInt32
+    var indexCount: UInt32
+}
+
+private struct VulkanTexture {
+    var image: UnsafeMutableRawPointer?
+    var imageView: UnsafeMutableRawPointer?
+    var sampler: UnsafeMutableRawPointer?
+    var width: Int
+    var height: Int
+}
+
+private struct VulkanMaterial {
+    var descriptorSet: UnsafeMutableRawPointer?
+    var albedoTexture: TextureHandle?
+    var normalTexture: TextureHandle?
+}
+
+// MARK: - Errors
+
+private enum RendererError: Error {
+    case notInitialized
+    case vulkanError(String)
+}
+