Re: Drawing a lot of SVG images is slow

Hi,

On Wed, Apr 2, 2025, 11:05 AM Quentin Cosendey <[email protected]>
wrote:

> 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 ?
>

Did you include necessary header?


>
> 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.
>

Look at all OpenGL samples in wx.
Build and run them.

Hopefully you will get smth useful...

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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