Re: Drawing a lot of SVG images is slow

Hello,


QC> What should I do to use D2D instead of GDI ?
EJ> wxGraphicsContext *gc = 
wxGraphicsRenderer::GetDirect2DRenderer()->CreateContext(...);


wxGraphicsRenderer::GetDirect2DRenderer() doesn't exists for me.


GameWindow.cpp: In member function 'void 
GameWindow::OnPaint(wxPaintEvent&)':
GameWindow.cpp:943:21: error: 'GetDirect2DRenderer' is not a member of 
'wxGraphicsRenderer'
   943 | wxGraphicsRenderer::GetDirect2DRenderer() ->CreateContext(dc)


Do I need to do something special to have it ?


QC>Isn't there a more direct way to draw SVG images ?
Leo> According to Brave Search, yes:
Leo> https://github.com/micahpearlman/MonkVG
Leo> I think that one sounds like what you need. It doesn't mention wx 
compatibility, but since it runs on top of OpenGL, I imagine it can be 
made compatible without much tinkering.


I don't use OpenGL at all, so I don't know if it's doable with 
WXWidgets, but I'll have a look at that library, at least maybe to get 
ideas. Thank you.


Thank you very much.

Best regards.



Le 02.04.2025 à 08:00, 'Eric Jensen' via wx-users a écrit :
> Hello Quentin,
>
> Wednesday, April 2, 2025, 6:36:27 AM, you wrote:
>
>
> VZ>>  Also, under Windows, using D2D-based wxGraphicsContext could be much faster than using the default GDI+-based one or GDI.
> QC> What should I do to use D2D instead of GDI ?
> wxGraphicsContext *gc = wxGraphicsRenderer::GetDirect2DRenderer()->CreateContext(...);
>
> VZ>>  You could try using LunaSVG, but normally SVG rasterizing performance shouldn't count anyhow, as the bitmaps should be cached. Drawing 1000 bitmaps is not going to be fast neither, unfortunately, so if you can find a way to precombine them, consider doing this.
> QC> I'll have a look at LunaSVG. Combining is maybe the key point, I'll also try to find a way to improve that as well.
> Rendering the SVG each time will always be significantly slower than drawing a pre-rendered bitmap.
>
> Eric
>
>
>

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