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Diffstat (limited to 'drawinglayer/source/primitive2d/unifiedtransparenceprimitive2d.cxx')
| -rw-r--r-- | drawinglayer/source/primitive2d/unifiedtransparenceprimitive2d.cxx | 136 |
1 files changed, 136 insertions, 0 deletions
diff --git a/drawinglayer/source/primitive2d/unifiedtransparenceprimitive2d.cxx b/drawinglayer/source/primitive2d/unifiedtransparenceprimitive2d.cxx new file mode 100644 index 000000000000..6d930e40f5d7 --- /dev/null +++ b/drawinglayer/source/primitive2d/unifiedtransparenceprimitive2d.cxx @@ -0,0 +1,136 @@ +/************************************************************************* + * + * OpenOffice.org - a multi-platform office productivity suite + * + * $RCSfile: UnifiedTransparencePrimitive2D.cxx,v $ + * + * $Revision: 1.5 $ + * + * last change: $Author: aw $ $Date: 2008-05-27 14:11:20 $ + * + * The Contents of this file are made available subject to + * the terms of GNU Lesser General Public License Version 2.1. + * + * + * GNU Lesser General Public License Version 2.1 + * ============================================= + * Copyright 2005 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 + * + ************************************************************************/ + +// MARKER(update_precomp.py): autogen include statement, do not remove +#include "precompiled_drawinglayer.hxx" + +#include <drawinglayer/primitive2d/unifiedtransparenceprimitive2d.hxx> +#include <basegfx/polygon/b2dpolygon.hxx> +#include <basegfx/polygon/b2dpolygontools.hxx> +#include <basegfx/color/bcolor.hxx> +#include <drawinglayer/primitive2d/polypolygonprimitive2d.hxx> +#include <drawinglayer/primitive2d/transparenceprimitive2d.hxx> +#include <drawinglayer/primitive2d/drawinglayer_primitivetypes2d.hxx> +#include <drawinglayer/primitive2d/polygonprimitive2d.hxx> + +////////////////////////////////////////////////////////////////////////////// + +using namespace com::sun::star; + +////////////////////////////////////////////////////////////////////////////// + +namespace drawinglayer +{ + namespace primitive2d + { + UnifiedTransparencePrimitive2D::UnifiedTransparencePrimitive2D( + const Primitive2DSequence& rChildren, + double fTransparence) + : GroupPrimitive2D(rChildren), + mfTransparence(fTransparence) + { + } + + bool UnifiedTransparencePrimitive2D::operator==(const BasePrimitive2D& rPrimitive) const + { + if(GroupPrimitive2D::operator==(rPrimitive)) + { + const UnifiedTransparencePrimitive2D& rCompare = (UnifiedTransparencePrimitive2D&)rPrimitive; + + return (getTransparence() == rCompare.getTransparence()); + } + + return false; + } + + basegfx::B2DRange UnifiedTransparencePrimitive2D::getB2DRange(const geometry::ViewInformation2D& rViewInformation) const + { + // do not use the fallback to decomposition here since for a correct BoundRect we also + // need invisible (1.0 == getTransparence()) geometry; these would be deleted in the decomposition + return getB2DRangeFromPrimitive2DSequence(getChildren(), rViewInformation); + } + + Primitive2DSequence UnifiedTransparencePrimitive2D::get2DDecomposition(const geometry::ViewInformation2D& rViewInformation) const + { + if(0.0 == getTransparence()) + { + // no transparence used, so just use the content + return getChildren(); + } + else if(getTransparence() > 0.0 && getTransparence() < 1.0) + { + // The idea is to create a TransparencePrimitive2D with transparent content using a fill color + // corresponding to the transparence value. Problem is that in most systems, the right + // and bottom pixel array is not filled when filling polygons, thus this would not + // always produce a complete transparent bitmap. There are some solutions: + // + // - Grow the used polygon range by one discrete unit in X and Y. This + // will make the decomposition view-dependent. + // + // - For all filled polygon renderings, dra wthe polygon outline extra. This + // would lead to unwanted side effects when using concatenated polygons. + // + // - At this decomposition, add a filled polygon and a hairline polygon. This + // solution stays view-independent. + // + // I will take the last one here. The small overhead of two primitives will only be + // used when UnifiedTransparencePrimitive2D is not handled directly. + const basegfx::B2DRange aPolygonRange(getB2DRangeFromPrimitive2DSequence(getChildren(), rViewInformation)); + const basegfx::B2DPolygon aPolygon(basegfx::tools::createPolygonFromRect(aPolygonRange)); + const basegfx::BColor aGray(getTransparence(), getTransparence(), getTransparence()); + Primitive2DSequence aTransparenceContent(2); + + aTransparenceContent[0] = Primitive2DReference(new PolyPolygonColorPrimitive2D(basegfx::B2DPolyPolygon(aPolygon), aGray)); + aTransparenceContent[1] = Primitive2DReference(new PolygonHairlinePrimitive2D(aPolygon, aGray)); + + // create sub-transparence group with a gray-colored rectangular fill polygon + const Primitive2DReference xRefB(new TransparencePrimitive2D(getChildren(), aTransparenceContent)); + return Primitive2DSequence(&xRefB, 1L); + } + else + { + // completely transparent or invalid definition, add nothing + return Primitive2DSequence(); + } + } + + // provide unique ID + ImplPrimitrive2DIDBlock(UnifiedTransparencePrimitive2D, PRIMITIVE2D_ID_UNIFIEDTRANSPARENCEPRIMITIVE2D) + + } // end of namespace primitive2d +} // end of namespace drawinglayer + +////////////////////////////////////////////////////////////////////////////// +// eof |