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How GUI implemented from video card to Qt framework?

I've been curious about how GUIs are implemented for a long time. I know how to write Qt (or other) code, and I want to know:

  • How Qt calls Xlib (under Linux), and implements the Qt framework.
  • How Xlib calls linux system calls
  • How Linux controls the video card

Are there any good articles for introducing GUI implementati开发者_如何学Pythonons?


http://en.wikipedia.org/wiki/X_Window_System#Design

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