如何使用Swift在NSOpenGLView中绘制图像？

import Cocoa
import OpenGL.GL

class MyOpenGLView: NSOpenGLView {
    override init(frame frameRect: NSRect) {
        let pixelFormat = NSOpenGLPixelFormat(attributes: [
            NSOpenGLPixelFormatAttribute(NSOpenGLPFAAccelerated),
            NSOpenGLPixelFormatAttribute(NSOpenGLPFADoubleBuffer),
            NSOpenGLPixelFormatAttribute(NSOpenGLPFAColorSize), 24,
            NSOpenGLPixelFormatAttribute(NSOpenGLPFAAlphaSize), 8,
            NSOpenGLPixelFormatAttribute(NSOpenGLPFADepthSize), 16,
            0
        ])
        
        super.init(frame: frameRect, pixelFormat: pixelFormat)
    }
    
    required init?(coder: NSCoder) {
        super.init(coder: coder)
    }
    
    override func drawRect(dirtyRect: NSRect) {
        super.drawRect(dirtyRect)
        
        // 设置清屏颜色
        glClearColor(0.0, 0.0, 0.0, 1.0)
        glClear(GLbitfield(GL_COLOR_BUFFER_BIT))
        
        // 设置绘制颜色
        glColor3f(1.0, 1.0, 1.0)
        
        // 绘制三角形
        glBegin(GLenum(GL_TRIANGLES))
        glVertex2f(-0.5, -0.5)
        glVertex2f(0.5, -0.5)
        glVertex2f(0.0, 0.5)
        glEnd()
        
        // 刷新缓冲区
        glFlush()
    }
}