INTEGRATION: CWS presentationengine01 (1.1.2); FILE ADDED

2004/09/29 18:36:26 thb 1.1.2.2: #110496# Extended polygon raster converter with adaptable update area (needed that for DX clip emulation in alpha channel)
2004/09/09 14:33:31 thb 1.1.2.1: Initial revision

1 files changed, 184 insertions, 0 deletions

diff --git a/basegfx/inc/basegfx/polygon/b2dpolypolygonrasterconverter.hxx b/basegfx/inc/basegfx/polygon/b2dpolypolygonrasterconverter.hxx
new file mode 100644
index 000000000000..25d29f4af99f
--- /dev/null
+++ b/basegfx/inc/basegfx/polygon/b2dpolypolygonrasterconverter.hxx
@@ -0,0 +1,184 @@
+/*************************************************************************
+ *
+ *  $RCSfile: b2dpolypolygonrasterconverter.hxx,v $
+ *
+ *  $Revision: 1.2 $
+ *
+ *  last change: $Author: rt $ $Date: 2004-11-26 18:33:32 $
+ *
+ *  The Contents of this file are made available subject to the terms of
+ *  either of the following licenses
+ *
+ *         - GNU Lesser General Public License Version 2.1
+ *         - Sun Industry Standards Source License Version 1.1
+ *
+ *  Sun Microsystems Inc., October, 2000
+ *
+ *  GNU Lesser General Public License Version 2.1
+ *  =============================================
+ *  Copyright 2000 by Sun Microsystems, Inc.
+ *  901 San Antonio Road, Palo Alto, CA 94303, USA
+ *
+ *  This library is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU Lesser General Public
+ *  License version 2.1, as published by the Free Software Foundation.
+ *
+ *  This library is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *  Lesser General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Lesser General Public
+ *  License along with this library; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ *  MA  02111-1307  USA
+ *
+ *
+ *  Sun Industry Standards Source License Version 1.1
+ *  =================================================
+ *  The contents of this file are subject to the Sun Industry Standards
+ *  Source License Version 1.1 (the "License"); You may not use this file
+ *  except in compliance with the License. You may obtain a copy of the
+ *  License at http://www.openoffice.org/license.html.
+ *
+ *  Software provided under this License is provided on an "AS IS" basis,
+ *  WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING,
+ *  WITHOUT LIMITATION, WARRANTIES THAT THE SOFTWARE IS FREE OF DEFECTS,
+ *  MERCHANTABLE, FIT FOR A PARTICULAR PURPOSE, OR NON-INFRINGING.
+ *  See the License for the specific provisions governing your rights and
+ *  obligations concerning the Software.
+ *
+ *  The Initial Developer of the Original Code is: Sun Microsystems, Inc.
+ *
+ *  Copyright: 2000 by Sun Microsystems, Inc.
+ *
+ *  All Rights Reserved.
+ *
+ *  Contributor(s): _______________________________________
+ *
+ *
+ ************************************************************************/
+
+#ifndef _BGFX_POLYGON_B2DPOLYPOLYGONRASTERCONVERTER_HXX
+#define _BGFX_POLYGON_B2DPOLYPOLYGONRASTERCONVERTER_HXX
+
+#ifndef _BGFX_POINT_B2DPOINT_HXX
+#include <basegfx/point/b2dpoint.hxx>
+#endif
+#ifndef _BGFX_RANGE_B2DRECTANGLE_HXX
+#include <basegfx/range/b2drectangle.hxx>
+#endif
+#ifndef _BGFX_POLYGON_B2DPOLYPOLYGON_HXX
+#include <basegfx/polygon/b2dpolypolygon.hxx>
+#endif
+#ifndef _BGFX_POLYGON_B2DPOLYPOLYGONFILLRULE_HXX
+#include <basegfx/polygon/b2dpolypolygonfillrule.hxx>
+#endif
+
+#include <vector>
+#include <utility>
+
+//////////////////////////////////////////////////////////////////////////////
+
+namespace basegfx
+{
+    /** Raster-convert a poly-polygon.
+
+        This class can raster-convert a given poly-polygon. Simply
+        derive from this, and override the span() method, which will
+        get called for every scanline span of the poly-polygon.
+
+        @derive
+        Overwrite span() with the render output method of your choice.
+     */
+    class B2DPolyPolygonRasterConverter
+    {
+    public:
+        /** Create raster-converter for given poly-polygon
+         */
+        B2DPolyPolygonRasterConverter(const B2DPolyPolygon& rPolyPolyRaster);
+
+        /** Create raster-converter for given poly-polygon and raster
+            area.
+
+            @param rPolyPolyRaster
+            Poly-Polygon to raster convert
+
+            @param rMinUpdateArea
+            Minimal area to touch when raster-converting. The
+            rectangle given here is guaranteed to be iterated through
+            scanline by scanline (but the raster converter might
+            actually use more scanlines, e.g. if the poly-polygon's
+            bound rect is larger). One of the cases where this
+            parameter comes in handy is when rendering in the 'off'
+            spans, and a certain area must be filled. <em>Do not</em>
+            use this for clipping, as described above, the touched
+            area might also be larger.
+         */
+        B2DPolyPolygonRasterConverter(const B2DPolyPolygon& rPolyPolyRaster,
+                                      const B2DRectangle&   rRasterArea );
+
+        virtual ~B2DPolyPolygonRasterConverter();
+
+        /** Raster-convert the contained poly-polygon
+
+            @param eFillRule
+            Fill rule to use for span filling
+         */
+        void rasterConvert( FillRule eFillRule);
+
+        /** Override this method, to be called for every scanline span
+            of the poly-polygon
+
+            @param rfXLeft
+            The left end of the current horizontal span
+
+            @param rfXRight
+            The right end of the current horizontal span
+
+            @param nY
+            The y position of the current horizontal span
+
+            @param bOn
+            Denotes whether this span is on or off, according to the
+            active fill rule.
+        */
+        virtual void span(const double& rfXLeft,
+                          const double& rfXRight,
+                          sal_Int32     nY,
+                          bool          bOn ) = 0;
+
+        /// @internal
+        struct Vertex
+        {
+            inline Vertex();
+            inline Vertex( const B2DPoint&, const B2DPoint&, bool );
+
+            B2DPoint    aP1;
+            B2DPoint    aP2;
+            bool        bDownwards;
+        };
+
+    private:
+        // default: disabled copy/assignment
+        B2DPolyPolygonRasterConverter(const B2DPolyPolygonRasterConverter&);
+        B2DPolyPolygonRasterConverter& operator=( const B2DPolyPolygonRasterConverter& );
+
+        void init();
+
+        typedef ::std::vector<Vertex>               VectorOfVertices;
+        typedef ::std::vector<VectorOfVertices>     VectorOfVertexVectors;
+
+        /// The poly-polygon to raster-convert
+        B2DPolyPolygon                              maPolyPolygon;
+        /// Total bound rect of the poly-polygon
+        const B2DRectangle                          maPolyPolyRectangle;
+
+        /** Vector containing for each scanline a vector which in turn
+            contains all vertices that start on the specific scanline
+         */
+        VectorOfVertexVectors                       maScanlines;
+    };
+}
+
+#endif /* _BGFX_POLYGON_B2DPOLYPOLYGONRASTERCONVERTER_HXX */