//
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// Renderer.swift
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// LiveProject
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// 渲染工具
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// Created by 倪路朋 on 6/26/25.
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//
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import CoreVideo
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import Metal
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import MetalKit
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class MetalRenderer: NSObject, MTKViewDelegate {
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var device: MTLDevice!
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var commandQueue: MTLCommandQueue!
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func setup(view: MTKView) {
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self.device = view.device
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self.commandQueue = device.makeCommandQueue()
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// 初始化 texture、pipeline 等
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}
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// ✅ 必须实现的方法 1：窗口大小改变时调用
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func mtkView(_ view: MTKView, drawableSizeWillChange size: CGSize) {
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// 可以留空或更新视图缩放、渲染区域等
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}
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// ✅ 必须实现的方法 2：每一帧绘制时调用
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func draw(in view: MTKView) {
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guard let drawable = view.currentDrawable,
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let descriptor = view.currentRenderPassDescriptor else { return }
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let commandBuffer = commandQueue.makeCommandBuffer()!
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let encoder = commandBuffer.makeRenderCommandEncoder(descriptor: descriptor)!
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// 渲染逻辑，如绘制纹理
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encoder.endEncoding()
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commandBuffer.present(drawable)
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commandBuffer.commit()
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}
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}
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