Linux drawGraphicsPath Issue

rjonkman · June 25, 2022, 5:19am

I’m seeing an issue CGraphicsPaths on Linux. I’m not exactly sure where the problem is, but I can say that it only shows up when the view is in a CViewContainter and a transform is involved. Same code draws fine in Windows and OSX.

rjonkman · June 25, 2022, 10:40am

There’s only an issue if the CViewContainer is offset from the origin (the top left corner is not 0,0). Here’s the related code, but I honestly can’t see what might be wrong with it.

github.com

steinbergmedia/vstgui/blob/eb22dde24c89c70b611d7f5e4dcf625089a51002/vstgui/lib/platform/linux/cairocontext.cpp#L460


      
          }
          
          
//-----------------------------------------------------------------------------
          CGraphicsPath* Context::createTextPath (const CFontRef font, UTF8StringPtr text)
          {
          #warning TODO: Implementation
          	return nullptr;
          }
          
          
//-----------------------------------------------------------------------------
          void Context::drawGraphicsPath (CGraphicsPath* path, CDrawContext::PathDrawMode mode,
          								CGraphicsTransform* transformation)
          {
          	if (path)
          	{
          		auto graphicsPath = dynamic_cast<GraphicsPath*> (
          			path->getPlatformPath (PlatformGraphicsPathFillMode::Ignored).get ());
          		if (!graphicsPath)
          			return;
          		if (auto cd = DrawBlock::begin (*this))
          		{

rjonkman · June 26, 2022, 2:37am

I fixed the issue and added a pull request.