From e21b1c797955a231f2bcf71818e0259fbb6aeba1 Mon Sep 17 00:00:00 2001
From: Runt <qingingrunt2010@qq.com>
Date: Fri, 27 Jun 2025 15:57:25 +0000
Subject: [PATCH] 相机权限
---
LiveProject/tool/MetalRenderer.swift | 55 ++++++++++++++++++++++++++++++++++++++++++++-----------
1 files changed, 44 insertions(+), 11 deletions(-)
diff --git a/LiveProject/tool/MetalRenderer.swift b/LiveProject/tool/MetalRenderer.swift
index 791dfc8..a2aa4ba 100644
--- a/LiveProject/tool/MetalRenderer.swift
+++ b/LiveProject/tool/MetalRenderer.swift
@@ -4,35 +4,68 @@
// 渲染工具
// Created by 倪路朋 on 6/26/25.
//
-import CoreVideo
-import Metal
import MetalKit
class MetalRenderer: NSObject, MTKViewDelegate {
- var device: MTLDevice!
- var commandQueue: MTLCommandQueue!
+ private var device: MTLDevice!
+ private var commandQueue: MTLCommandQueue!
+ private var textureCache: CVMetalTextureCache!
+ private var currentPixelBuffer: CVPixelBuffer?
func setup(view: MTKView) {
self.device = view.device
self.commandQueue = device.makeCommandQueue()
- // 初始化 texture、pipeline 等
+ CVMetalTextureCacheCreate(nil, nil, device, nil, &textureCache)
}
- // ✅ 必须实现的方法 1：窗口大小改变时调用
- func mtkView(_ view: MTKView, drawableSizeWillChange size: CGSize) {
- // 可以留空或更新视图缩放、渲染区域等
+ func updateFrame(pixelBuffer: CVPixelBuffer) {
+ self.currentPixelBuffer = pixelBuffer
}
- // ✅ 必须实现的方法 2：每一帧绘制时调用
+ func mtkView(_ view: MTKView, drawableSizeWillChange size: CGSize) {}
+
func draw(in view: MTKView) {
guard let drawable = view.currentDrawable,
- let descriptor = view.currentRenderPassDescriptor else { return }
+ let descriptor = view.currentRenderPassDescriptor,
+ let pixelBuffer = currentPixelBuffer else { return }
+
+ var textureRef: CVMetalTexture?
+ let width = CVPixelBufferGetWidth(pixelBuffer)
+ let height = CVPixelBufferGetHeight(pixelBuffer)
+
+ let status = CVMetalTextureCacheCreateTextureFromImage(
+ nil, textureCache, pixelBuffer, nil,
+ .bgra8Unorm, width, height, 0, &textureRef)
+
+ guard status == kCVReturnSuccess,
+ let cvTexture = textureRef,
+ let texture = CVMetalTextureGetTexture(cvTexture) else { return }
let commandBuffer = commandQueue.makeCommandBuffer()!
let encoder = commandBuffer.makeRenderCommandEncoder(descriptor: descriptor)!
- // 渲染逻辑，如绘制纹理
+ encoder.setFragmentTexture(texture, index: 0)
encoder.endEncoding()
+
+ // 简单拷贝（不做 shader 处理）
+ let blitEncoder = commandBuffer.makeBlitCommandEncoder()!
+ let dstTexture = drawable.texture
+ if dstTexture.width != texture.width || dstTexture.height != texture.height {
+ print("❌ 尺寸不一致，无法 blit：src = \(texture.width)x\(texture.height), dst = \(dstTexture.width)x\(dstTexture.height)")
+ return
+ }
+ blitEncoder.copy(from: texture,
+ sourceSlice: 0,
+ sourceLevel: 0,
+ sourceOrigin: MTLOrigin(x: 0, y: 0, z: 0),
+ sourceSize: MTLSize(width: width, height: height, depth: 1),
+ to: drawable.texture,
+ destinationSlice: 0,
+ destinationLevel: 0,
+ destinationOrigin: MTLOrigin(x: 0, y: 0, z: 0))
+ blitEncoder.endEncoding()
+
commandBuffer.present(drawable)
commandBuffer.commit()
+ print("绘制画面")
}
}
--
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