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Author Topic: What I've found about slowdown of CudaText rendering  (Read 1331 times)

Alextp

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What I've found about slowdown of CudaText rendering
« on: January 30, 2021, 08:50:11 am »
https://github.com/Alexey-T/CudaText/issues/3089

Quote
I found that scale of window by X (800x600 -> 1800x600) don't slow down the rendering.
scale of window by Y (800x600 -> 800x1200) DOES slow down (600->1200, slower by 2 times).
so the reason is: Canvas.TextOut (or LCLIntf.ExtTextOut) is slowing down all render.
I also see that debugger stops inside the ExtTextOut (most of the time, in 80%).

I cannot solve it, TextOut (ExtTextOut) on linux is not known code to me.

the same slowdown occurs on gtk2 and qt5.
so it is mostly Lazarus issue of gtk2/qt5 codes.

 

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