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Core Graphics: mask image, add Overlay and Underlay

How to mask an image, add overlay and lining to a masked image using Core Graphics? (for example: a document icon consists of a png mask, a curl png page and a base with a shadow). Can anyone give me a best practice?

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  • Draw a lining with CGContextDrawImage().
  • Click the state of the graphics context with CGContextSaveGState().
  • Download the mask and add it to the context with CGContextClipToMask().
  • Draw your content.
  • Put the graphics context on CGContextRestoreGState().
  • Draw your overlay image with CGContextDrawImage().
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Source: https://habr.com/ru/post/1792852/

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