[Bug 17982] New: PatBlt cannot draw arbitrary parallelograms based on the world transform

http://bugs.winehq.org/show_bug.cgi?id=17982

Summary: PatBlt cannot draw arbitrary parallelograms based on the
                    world transform
           Product: Wine
           Version: 1.1.18
          Platform: Other
        OS/Version: other
            Status: UNCONFIRMED
          Severity: enhancement
          Priority: P2
         Component: winex11.drv
        AssignedTo: [e-mail]
        ReportedBy: [e-mail]

Using the functions SetGraphicsMode and (Set|Modify)WorldTransform, it is
possible to define an arbitrary matrix to transform all points as things are
drawn to device contexts. Using this matrix, it should be possible to apply
arbitrary rotation/shear effects. Thus, rectangles drawn on the hdc can be
transformed into arbitrary parallelograms.

This only works on systems where GM_ADVANCED is supported (NT but not 9x,
according to MSDN).

I have written a test program that demonstrates this on Windows. On Wine, it
can only draw rectangles.