CWS-TOOLING: integrate CWS aw066_DEV300

2009-03-19 17:20:55 +0100 aw  r269762 : #i99662# enhanced MetaFile paint by avoiding single pixel scalings due to MapMode errors
2009-03-19 17:20:18 +0100 aw  r269761 : #i99662# enhanced 3D AA by using the SnapHorVerLinesToDiscrete options flag to unify the hor/ver hairlines

basegfx/inc/basegfx/polygon/b3dpolygontools.hxx

@@ -174,6 +174,20 @@ namespace basegfx
         bool equal(const B3DPolygon& rCandidateA, const B3DPolygon& rCandidateB, const double& rfSmallValue);
         bool equal(const B3DPolygon& rCandidateA, const B3DPolygon& rCandidateB);
 
+        /** snap some polygon coordinates to discrete coordinates
+
+            This method allows to snap some polygon points to discrete (integer) values
+            which equals e.g. a snap to discrete coordinates. It will snap points of
+            horizontal and vertical edges
+
+            @param rCandidate
+            The source polygon
+
+            @return
+            The modified version of the source polygon
+        */
+        B3DPolygon snapPointsOfHorizontalOrVerticalEdges(const B3DPolygon& rCandidate);
+
     } // end of namespace tools
 } // end of namespace basegfx
 

basegfx/source/polygon/b3dpolygontools.cxx

@@ -39,6 +39,7 @@
 #include <basegfx/matrix/b3dhommatrix.hxx>
 #include <basegfx/polygon/b2dpolygon.hxx>
 #include <basegfx/polygon/b2dpolygontools.hxx>
+#include <basegfx/tuple/b3ituple.hxx>
 #include <numeric>
 
 //////////////////////////////////////////////////////////////////////////////
@@ -1101,6 +1102,67 @@ namespace basegfx
             return equal(rCandidateA, rCandidateB, fSmallValue);
         }
 
+        // snap points of horizontal or vertical edges to discrete values
+        B3DPolygon snapPointsOfHorizontalOrVerticalEdges(const B3DPolygon& rCandidate)
+        {
+            const sal_uInt32 nPointCount(rCandidate.count());
+
+            if(nPointCount > 1)
+            {
+                // Start by copying the source polygon to get a writeable copy. The closed state is
+                // copied by aRetval's initialisation, too, so no need to copy it in this method
+                B3DPolygon aRetval(rCandidate);
+
+                // prepare geometry data. Get rounded from original
+                B3ITuple aPrevTuple(basegfx::fround(rCandidate.getB3DPoint(nPointCount - 1)));
+                B3DPoint aCurrPoint(rCandidate.getB3DPoint(0));
+                B3ITuple aCurrTuple(basegfx::fround(aCurrPoint));
+
+                // loop over all points. This will also snap the implicit closing edge
+                // even when not closed, but that's no problem here
+                for(sal_uInt32 a(0); a < nPointCount; a++)
+                {
+                    // get next point. Get rounded from original
+                    const bool bLastRun(a + 1 == nPointCount);
+                    const sal_uInt32 nNextIndex(bLastRun ? 0 : a + 1);
+                    const B3DPoint aNextPoint(rCandidate.getB3DPoint(nNextIndex));
+                    const B3ITuple aNextTuple(basegfx::fround(aNextPoint));
+
+                    // get the states
+                    const bool bPrevVertical(aPrevTuple.getX() == aCurrTuple.getX());
+                    const bool bNextVertical(aNextTuple.getX() == aCurrTuple.getX());
+                    const bool bPrevHorizontal(aPrevTuple.getY() == aCurrTuple.getY());
+                    const bool bNextHorizontal(aNextTuple.getY() == aCurrTuple.getY());
+                    const bool bSnapX(bPrevVertical || bNextVertical);
+                    const bool bSnapY(bPrevHorizontal || bNextHorizontal);
+
+                    if(bSnapX || bSnapY)
+                    {
+                        const B3DPoint aSnappedPoint(
+                            bSnapX ? aCurrTuple.getX() : aCurrPoint.getX(),
+                            bSnapY ? aCurrTuple.getY() : aCurrPoint.getY(),
+                            aCurrPoint.getZ());
+
+                        aRetval.setB3DPoint(a, aSnappedPoint);
+                    }
+
+                    // prepare next point
+                    if(!bLastRun)
+                    {
+                        aPrevTuple = aCurrTuple;
+                        aCurrPoint = aNextPoint;
+                        aCurrTuple = aNextTuple;
+                    }
+                }
+
+                return aRetval;
+            }
+            else
+            {
+                return rCandidate;
+            }
+        }
+
     } // end of namespace tools
 } // end of namespace basegfx