[Solved] deactivate IntersectClipRegion

[Paolo]

Hello, (win 10, 64-bit, FPC/LAZ 3.2.2/2.2.6

I have a code like this, that allows writing inside a specific boundary (given by FActiveRect) and anything outside is properly clipped

Code: Pascal  [Select][+][-]

1. var
2.   FVideoBitMap : TBitMap;
3.   FActiveRect : TRect;
4. ...
5.   FVideoBitMap.Canvas.IntersectClipRect(FVideoBitMap.Canvas.Handle, FActiveRect.Left,  FActiveRect.Top, FActiveRect.Right, ActiveRect.Bottom);
6.   DoDrawing;
7. ...
8.  

however, how to restore the full access to the bitmap (ie disabling the effect of IntersectClipRect) ?

[ASerge]

however, how to restore the full access to the bitmap (ie disabling the effect of IntersectClipRect) ?

Code: Pascal  [Select][+][-]

1. SelectClipRgn(FVideoBitMap.Canvas.Handle, 0);

And IntersectClipRect is a standalone function, not a TCanvas method.

[Paolo]

Ooops Copy-paste error, you are right.

Code: Pascal  [Select][+][-]

1. var
2.   FVideoBitMap : TBitMap;
3.   FActiveRect : TRect;
4. ...
5.   IntersectClipRect(FVideoBitMap.Canvas.Handle, FActiveRect.Left,  FActiveRect.Top, FActiveRect.Right, ActiveRect.Bottom);
6.   DoDrawing;
7. ...
8.  

many thanks for the support, now my code with SelectClipRgn(FVideoBitMap.Canvas.Handle, 0) seems working as expected.