[2/4] gdi32: Fix text rotation problem in GM_ADVANCED graphics mode.

[Ralf Habacker]

> On Tue, Jan 07, 2014 at 02:33:32PM +0100, Ralf Habacker wrote:
> > @@ -1327,6 +1327,20 @@ BOOL WINAPI GetTextExtentExPointW( HDC hdc,
> > LPCWSTR str, INT count, INT max_ext,
> >          }
> >      }
> >
> > +    XFORM old;
> > +    BOOL exclude_rotation = FALSE;
> > +    if ( GetGraphicsMode( hdc ) == GM_ADVANCED )
> > +    {
> > +        GetWorldTransform( hdc, &old );
> > +        XFORM xf = old;
> > +        if ( hasRotatedAndSameScaledMatrixOnly( &xf ) )
> > +        {
> > +            exclude_rotation = TRUE;
> > +            removeRotationFromMatrix( &xf, NULL );
> > +            SetWorldTransform( hdc, &xf );
> > +        }
> > +    }
>
> Does Windows really do this only in the same-scaled, non-sheared case?

The updated patch
http://www.winehq.org/pipermail/wine-patches/2014-January/129505.html
contains a related hint from the developer:

"Note: The current implementation only works on matrixes with uniform
scale and shear, which has to be checked by a call to
xform_has_rotate_and_uniform_scale_and_shear().
Hints how to get *unique* values for non-uniform matrixes are welcome."

The application, for which the patch has been written
(http://appdb.winehq.org/objectManager.php?sClass=application&iId=13649)
works fine with this patches, as it only uses dc rotatation.

Regards
 Ralf