kicad-developers team mailing list archive

[jp charras <jp.charras@xxxxxxxxxx>]

Le 09/02/2014 09:06, Cirilo Bernardo a écrit :
> The attached patch is a partial fix to bug 1255937.
> 
> Symptom: Pad outlines (arcs) in the back silk and mask are rendered incorrectly
> (arc drawn in wrong direction) when a mirrored image is printed.
> 
> This patch works by checking the Device Origin and if the Y coordinate is not
> 0 it is assumed that the X axis is reversed. I would appreciate any comments
> on this proposed solution; I don't know the code well enough to know if it is
> possible to have a non-zero Y origin in another possibly future context
> (for example, drawing on screen with the X orientation reversed).
> 
> Unfortunately this patch does not quite close the bug yet; there are other
> related artifacts which I am still investigating.
> 
> The patch is against rev. 4679
> 
> - Cirilo

You could try something like this:

    int slx = DC->DeviceToLogicalX( 1 ) - DC->DeviceToLogicalX( 0 );
    int sly = DC->DeviceToLogicalY( 1 ) - DC->DeviceToLogicalY( 0 );
    bool mirrored = (slx > 0 && sly < 0) || (slx < 0 && sly > 0);

to know if the DC is mirrored.

-- 
Jean-Pierre CHARRAS