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0030469: Visualization - Draw crashes when 3D view is minimized

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OpenGl_View::Redraw() - avoid rendering into window of zero size (leading to FPE and other issues).
This commit is contained in:
kgv
2019-02-01 16:20:24 +03:00
committed by bugmaster
parent 98ae54f728
commit d918208af6
2 changed files with 17 additions and 8 deletions
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17
src/OpenGl/OpenGl_View_Redraw.cxx
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@@ -179,10 +179,19 @@ void OpenGl_View::Redraw()
&& !aCtx->caps->buffersNoSwap
&& aFrameBuffer == NULL;
Standard_Integer aSizeX = aFrameBuffer != NULL ? aFrameBuffer->GetVPSizeX() : myWindow->Width();
Standard_Integer aSizeY = aFrameBuffer != NULL ? aFrameBuffer->GetVPSizeY() : myWindow->Height();
Standard_Integer aRendSizeX = Standard_Integer(myRenderParams.RenderResolutionScale * aSizeX + 0.5f);
Standard_Integer aRendSizeY = Standard_Integer(myRenderParams.RenderResolutionScale * aSizeY + 0.5f);
const Standard_Integer aSizeX = aFrameBuffer != NULL ? aFrameBuffer->GetVPSizeX() : myWindow->Width();
const Standard_Integer aSizeY = aFrameBuffer != NULL ? aFrameBuffer->GetVPSizeY() : myWindow->Height();
const Standard_Integer aRendSizeX = Standard_Integer(myRenderParams.RenderResolutionScale * aSizeX + 0.5f);
const Standard_Integer aRendSizeY = Standard_Integer(myRenderParams.RenderResolutionScale * aSizeY + 0.5f);
if (aSizeX < 1
|| aSizeY < 1
|| aRendSizeX < 1
|| aRendSizeY < 1)
{
myBackBufferRestored = Standard_False;
myIsImmediateDrawn = Standard_False;
return;
}
// determine multisampling parameters
Standard_Integer aNbSamples = !myToDisableMSAA && aSizeX == aRendSizeX