fix position correction for flipped shapes

This complements change a9fc1456
The Translation-compensation of that fix didn't work for flipped shapes.
Also, vertically flipped shapes made problems.
Also 360 °C = 0°C (drawingml.hxx)
I didn't dare to fix it earlier because there is some problem with the selection frames.
But that is an import bug, not caused by some export stuff!
This import bug makes the manipulation rectangles around the shapes flipped & turning in the wrong direction, perhaps due to
CroftCro$oft clockwisification!

Change-Id: I05aa036d31cd5d9a8b194897b3d92ec12d6d2c61
Signed-off-by: Lennard <Wasserthal@nefkom.net>
Reviewed-on: https://gerrit.libreoffice.org/1250Reviewed-by: Petr Mladek <pmladek@suse.cz>
Tested-by: Petr Mladek <pmladek@suse.cz>

oox/inc/oox/export/drawingml.hxx

@@ -28,7 +28,7 @@
 #include <tools/poly.hxx>
 #include <filter/msfilter/escherex.hxx>
 #ifndef PPTX_EXPORT_ROTATE_CLOCKWISIFY
-#define PPTX_EXPORT_ROTATE_CLOCKWISIFY(input) (21600000-input*600)
+#define PPTX_EXPORT_ROTATE_CLOCKWISIFY(input) ((21600000-input*600)%21600000)
 #endif
 
 class Graphic;

oox/source/export/drawingml.cxx

@@ -643,8 +643,14 @@ void DrawingML::WriteShapeTransformation( Reference< XShape > rXShape, sal_Int32
     {
         SdrObject* pShape = (SdrObject*) GetSdrObjectFromXShape( rXShape );
         nRotation=pShape->GetRotateAngle();
-        aPos.X-=(1-cos(nRotation*F_PI18000))*aSize.Width/2-sin(nRotation*F_PI18000)*aSize.Height/2;
-        aPos.Y-=(1-cos(nRotation*F_PI18000))*aSize.Height/2+sin(nRotation*F_PI18000)*aSize.Width/2;
+        int faccos=bFlipV ? -1 : 1;
+        int facsin=bFlipH ? -1 : 1;
+        aPos.X-=(1-faccos*cos(nRotation*F_PI18000))*aSize.Width/2-facsin*sin(nRotation*F_PI18000)*aSize.Height/2;
+        aPos.Y-=(1-faccos*cos(nRotation*F_PI18000))*aSize.Height/2+facsin*sin(nRotation*F_PI18000)*aSize.Width/2;
+    }
+    if (!bSuppressRotation)
+    {
+        if (bFlipV) {nRotation=(nRotation+18000)%36000;}
     }
     WriteTransformation( Rectangle( Point( aPos.X, aPos.Y ), Size( aSize.Width, aSize.Height ) ), nXmlNamespace, bFlipH, bFlipV, PPTX_EXPORT_ROTATE_CLOCKWISIFY(nRotation) );
 }