Intermittent GDI Crash

[Stefan Csomor]

Hi

I assume the problem lies at the place where the wxDC is set-up, is this an
ordinary Paint handler ? how are you setting it up ?

Best,

Stefan 


On 07.04.08 14:53, "Declan McMullen" <declan.mcmullen at gmail.com> wrote:

> Hey guys,
> 
> I'm getting an intermittent failure in my program and I cant seem to find out
> why
> heres the code
> 
> if(oldImage.compare(image) != 0 || refreshImage)
>     {
>         overlayImage.Destroy();
>         overlayImage = wxImage(image);
>         wxSize size = this->GetSize();
>         overlayImage.Rescale(size.GetWidth(), size.GetHeight());
>         
>         bitmap = wxBitmap(overlayImage);
>         oldImage = image;
>         refreshImage = false;
>     }
>     dc.DrawBitmap(bitmap, 0, 0, false);
> 
> 
> If creates a wxImage, rescales it to match the width and height of the panel
> im placing it in, then converts it
> to a dc for drawing. If the image hasnt change since the last draw I redraw
> the old image.
> 
> When it crashed it brings me to this method from gdiplusgraphics.h
> I've placed an arrow where the debug arrow is
> 
> SmoothingMode GetSmoothingMode() const
>     {
>         SmoothingMode smoothingMode = SmoothingModeInvalid;
> 
>         SetStatus(DllExports::GdipGetSmoothingMode(nativeGraphics,
> ->                                                   &smoothingMode));
> 
>         return smoothingMode;
>     }
> 
> I'm using visual c++ 2005
> 
> Sometimes it works fine sometimes it crashes, I havent been able to find a
> pattern to the crashes.
> 
> Its probably something small im doing wrong.
> Any information much appreciated
> 
> 

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