Resolves: fdo#82219 color graphics as black and white

i.e. revert

commit bb5c7d6a79309236d4f19bb2498f2e850f735a2f
Date:   Sun Apr 13 01:42:27 2014 +1000

    fdo#38844 Reduce XOR clipping for gradients

    Removed XOR clipping version of ClipAndDrawGradientMetafile. Because it
    has been removed, the other version isn't really needed in it's own
    function so I've moved it back into DrawGradient.

    Change-Id: Ib1519a019061c8c71183db63e5c11681bcad4cc4

Change-Id: Iff1cb48cb8fa6d29937cf228a57aea9e8072110c

4 files changed, 32 insertions, 4 deletions

diff --git a/include/vcl/outdev.hxx b/include/vcl/outdev.hxx
index 23abb00c7023..0d363096086e 100644
--- a/include/vcl/outdev.hxx
+++ b/include/vcl/outdev.hxx
@@ -1511,6 +1511,8 @@ protected:
     virtual void                EmulateDrawTransparent( const tools::PolyPolygon& rPolyPoly, sal_uInt16 nTransparencePercent );
     void                        DrawInvisiblePolygon( const tools::PolyPolygon& rPolyPoly );
 
+    virtual void                ClipAndDrawGradientMetafile ( const Gradient &rGradient, const tools::PolyPolygon &rPolyPoly );
+
 private:
 
     SAL_DLLPRIVATE bool         DrawTransparentNatively( const tools::PolyPolygon& rPolyPoly, sal_uInt16 nTransparencePercent );
diff --git a/include/vcl/print.hxx b/include/vcl/print.hxx
index 3a9ad1d3c236..242873c95dd1 100644
--- a/include/vcl/print.hxx
+++ b/include/vcl/print.hxx
@@ -259,6 +259,7 @@ protected:
 
     virtual long                GetGradientStepCount( long nMinRect ) SAL_OVERRIDE;
     virtual bool                UsePolyPolygonForComplexGradient() SAL_OVERRIDE;
+    virtual void                ClipAndDrawGradientMetafile ( const Gradient &rGradient, const tools::PolyPolygon &rPolyPoly ) SAL_OVERRIDE;
 
     void                        ScaleBitmap ( Bitmap&, SalTwoRect& ) SAL_OVERRIDE { };
 
diff --git a/vcl/source/gdi/print.cxx b/vcl/source/gdi/print.cxx
index 3fec08f330b0..fd23d197f64c 100644
--- a/vcl/source/gdi/print.cxx
+++ b/vcl/source/gdi/print.cxx
@@ -1813,6 +1813,16 @@ bool Printer::UsePolyPolygonForComplexGradient()
     return true;
 }
 
+void Printer::ClipAndDrawGradientMetafile ( const Gradient &rGradient, const tools::PolyPolygon &rPolyPoly )
+{
+    const Rectangle aBoundRect( rPolyPoly.GetBoundRect() );
+
+    Push( PushFlags::CLIPREGION );
+    IntersectClipRegion(vcl::Region(rPolyPoly));
+    DrawGradient( aBoundRect, rGradient );
+    Pop();
+}
+
 void Printer::InitFont() const
 {
     DBG_TESTSOLARMUTEX();
diff --git a/vcl/source/outdev/gradient.cxx b/vcl/source/outdev/gradient.cxx
index 8916e76825dd..7031103431bc 100644
--- a/vcl/source/outdev/gradient.cxx
+++ b/vcl/source/outdev/gradient.cxx
@@ -146,6 +146,24 @@ void OutputDevice::DrawGradient( const tools::PolyPolygon& rPolyPoly,
         mpAlphaVDev->DrawPolyPolygon( rPolyPoly );
 }
 
+void OutputDevice::ClipAndDrawGradientMetafile ( const Gradient &rGradient, const tools::PolyPolygon &rPolyPoly )
+{
+    const Rectangle aBoundRect( rPolyPoly.GetBoundRect() );
+    const bool  bOldOutput = IsOutputEnabled();
+
+    EnableOutput( false );
+    Push( PushFlags::RASTEROP );
+    SetRasterOp( ROP_XOR );
+    DrawGradient( aBoundRect, rGradient );
+    SetFillColor( COL_BLACK );
+    SetRasterOp( ROP_0 );
+    DrawPolyPolygon( rPolyPoly );
+    SetRasterOp( ROP_XOR );
+    DrawGradient( aBoundRect, rGradient );
+    Pop();
+    EnableOutput( bOldOutput );
+}
+
 void OutputDevice::DrawGradientToMetafile ( const tools::PolyPolygon& rPolyPoly,
                                             const Gradient& rGradient )
 {
@@ -172,10 +190,7 @@ void OutputDevice::DrawGradientToMetafile ( const tools::PolyPolygon& rPolyPoly,
             mpMetaFile->AddAction( new MetaCommentAction( "XGRAD_SEQ_BEGIN" ) );
             mpMetaFile->AddAction( new MetaGradientExAction( rPolyPoly, rGradient ) );
 
-            Push( PushFlags::CLIPREGION );
-            IntersectClipRegion(vcl::Region(rPolyPoly));
-            DrawGradient( aBoundRect, rGradient );
-            Pop();
+            ClipAndDrawGradientMetafile ( rGradient, rPolyPoly );
 
             mpMetaFile->AddAction( new MetaCommentAction( "XGRAD_SEQ_END" ) );
         }