Re: How to shift surface?

On Mon, 2018-06-11 at 08:29 +0100, Göran Hasse wrote:

I am trying to write a gtk + Cairo application that mimics the
animation in 
wikipedias sine graph.

There was posted an example some time ago -- in multiple versions.
First one did only clear and redraw -- which gave high CPU load. An
improved version of Uli Schlachter used shifting of display to reduce
load. A Nim version of first simple redraw is available here:

Various C codes you may find in this thread, I think first Uli
Schlachter post has a link to the most advanced C version.

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