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1. Offscreen Quartz drawing with Python

   

   #!/usr/bin/python
   
   from AppKit import *
   
   WIDTH = 128
   HEIGHT = 64
   
   def draw_something():
       p = NSBezierPath.bezierPath()
   
       p.moveToPoint_((10, 10))
       p.lineToPoint_((50, 60))
       p.lineToPoint_((110, 10))
       p.lineToPoint_((10, 10))
   
       NSColor.redColor().set()
       p.fill()
   
       NSColor.blueColor().set()
       p.stroke()
   
   offscreenRep = NSBitmapImageRep.alloc().initWithBitmapDataPlanes_pixelsWide_pixelsHigh_bitsPerSample_samplesPerPixel_hasAlpha_isPlanar_colorSpaceName_bitmapFormat_bytesPerRow_bitsPerPixel_(None, WIDTH, HEIGHT, 8, 4, True, False, NSCalibratedRGBColorSpace, 0, 4 * WIDTH, 32)
   
   context = NSGraphicsContext.graphicsContextWithBitmapImageRep_(offscreenRep)
   
   NSGraphicsContext.setCurrentContext_(context)
   
   #NSGraphicsContext.saveGraphicsState()
   
   draw_something()
   
   #NSGraphicsContext.restoreGraphicsState()
   
   data = offscreenRep.representationUsingType_properties_(NSPNGFileType, None)
   
   result = data.writeToFile_atomically_("img.png", True)