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transforming clippings correctly, even if there is no native graphics context available yet

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git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@43124 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
This commit is contained in:
Stefan Csomor 2006-11-06 16:48:54 +00:00
parent 480b9f185f
commit 1acf0e5cff
1 changed files with 18 additions and 2 deletions
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20
src/mac/carbon/graphics.cpp
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@ -1275,7 +1275,12 @@ void wxMacCoreGraphicsContext::EnsureIsValid()
m_releaseContext = true;
if ( !HIShapeIsEmpty(m_clipRgn) )
{
HIShapeReplacePathInCGContext( m_clipRgn, m_cgContext );
// the clip region is in device coordinates, so we convert this again to user coordinates
wxMacCFRefHolder<HIMutableShapeRef> hishape ;
hishape.Set( HIShapeCreateMutableCopy( m_clipRgn ) );
CGPoint transformedOrigin = CGPointApplyAffineTransform( CGPointZero,m_windowTransform);
HIShapeOffset( hishape, -transformedOrigin.x, -transformedOrigin.y );
HIShapeReplacePathInCGContext( hishape, m_cgContext );
CGContextClip( m_cgContext );
}
CGContextSaveGState( m_cgContext );
@ -1294,7 +1299,15 @@ void wxMacCoreGraphicsContext::Clip( const wxRegion &region )
}
else
{
m_clipRgn.Set(HIShapeCreateWithQDRgn( (RgnHandle) region.GetWXHRGN() ));
// this offsetting to device coords is not really correct, but since we cannot apply affine transforms
// to regions we try at least to have correct translations
wxMacCFRefHolder<HIShapeRef> hishape ;
hishape.Set( HIShapeCreateWithQDRgn( (RgnHandle) region.GetWXHRGN() ));
HIMutableShapeRef mutableShape = HIShapeCreateMutableCopy( hishape );
CGPoint transformedOrigin = CGPointApplyAffineTransform( CGPointZero, m_windowTransform );
HIShapeOffset( mutableShape, transformedOrigin.x, transformedOrigin.y );
m_clipRgn.Set(mutableShape);
}
}
@ -1308,6 +1321,9 @@ void wxMacCoreGraphicsContext::Clip( wxDouble x, wxDouble y, wxDouble w, wxDoubl
}
else
{
// the clipping itself must be stored as device coordinates, otherwise
// we cannot apply it back correctly
r.origin= CGPointApplyAffineTransform( r.origin, m_windowTransform );
m_clipRgn.Set(HIShapeCreateWithRect(&r));
}
}