119 lines
5.6 KiB
C++
119 lines
5.6 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/*
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* This file is part of the LibreOffice project.
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*
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* This file incorporates work covered by the following license notice:
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed
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* with this work for additional information regarding copyright
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* ownership. The ASF licenses this file to you under the Apache
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* License, Version 2.0 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.apache.org/licenses/LICENSE-2.0 .
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*/
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#include <drawinglayer/primitive2d/unifiedtransparenceprimitive2d.hxx>
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#include <basegfx/polygon/b2dpolygon.hxx>
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#include <basegfx/polygon/b2dpolygontools.hxx>
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#include <basegfx/color/bcolor.hxx>
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#include <drawinglayer/primitive2d/polypolygonprimitive2d.hxx>
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#include <drawinglayer/primitive2d/transparenceprimitive2d.hxx>
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#include <drawinglayer/primitive2d/drawinglayer_primitivetypes2d.hxx>
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#include <drawinglayer/primitive2d/polygonprimitive2d.hxx>
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//////////////////////////////////////////////////////////////////////////////
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using namespace com::sun::star;
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//////////////////////////////////////////////////////////////////////////////
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namespace drawinglayer
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{
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namespace primitive2d
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{
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UnifiedTransparencePrimitive2D::UnifiedTransparencePrimitive2D(
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const Primitive2DSequence& rChildren,
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double fTransparence)
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: GroupPrimitive2D(rChildren),
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mfTransparence(fTransparence)
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{
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}
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bool UnifiedTransparencePrimitive2D::operator==(const BasePrimitive2D& rPrimitive) const
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{
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if(GroupPrimitive2D::operator==(rPrimitive))
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{
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const UnifiedTransparencePrimitive2D& rCompare = (UnifiedTransparencePrimitive2D&)rPrimitive;
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return (getTransparence() == rCompare.getTransparence());
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}
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return false;
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}
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basegfx::B2DRange UnifiedTransparencePrimitive2D::getB2DRange(const geometry::ViewInformation2D& rViewInformation) const
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{
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// do not use the fallback to decomposition here since for a correct BoundRect we also
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// need invisible (1.0 == getTransparence()) geometry; these would be deleted in the decomposition
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return getB2DRangeFromPrimitive2DSequence(getChildren(), rViewInformation);
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}
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Primitive2DSequence UnifiedTransparencePrimitive2D::get2DDecomposition(const geometry::ViewInformation2D& rViewInformation) const
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{
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if(0.0 == getTransparence())
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{
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// no transparence used, so just use the content
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return getChildren();
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}
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else if(getTransparence() > 0.0 && getTransparence() < 1.0)
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{
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// The idea is to create a TransparencePrimitive2D with transparent content using a fill color
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// corresponding to the transparence value. Problem is that in most systems, the right
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// and bottom pixel array is not filled when filling polygons, thus this would not
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// always produce a complete transparent bitmap. There are some solutions:
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//
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// - Grow the used polygon range by one discrete unit in X and Y. This
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// will make the decomposition view-dependent.
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//
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// - For all filled polygon renderings, dra wthe polygon outline extra. This
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// would lead to unwanted side effects when using concatenated polygons.
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//
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// - At this decomposition, add a filled polygon and a hairline polygon. This
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// solution stays view-independent.
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//
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// I will take the last one here. The small overhead of two primitives will only be
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// used when UnifiedTransparencePrimitive2D is not handled directly.
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const basegfx::B2DRange aPolygonRange(getB2DRangeFromPrimitive2DSequence(getChildren(), rViewInformation));
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const basegfx::B2DPolygon aPolygon(basegfx::tools::createPolygonFromRect(aPolygonRange));
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const basegfx::BColor aGray(getTransparence(), getTransparence(), getTransparence());
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Primitive2DSequence aTransparenceContent(2);
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aTransparenceContent[0] = Primitive2DReference(new PolyPolygonColorPrimitive2D(basegfx::B2DPolyPolygon(aPolygon), aGray));
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aTransparenceContent[1] = Primitive2DReference(new PolygonHairlinePrimitive2D(aPolygon, aGray));
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// create sub-transparence group with a gray-colored rectangular fill polygon
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const Primitive2DReference xRefB(new TransparencePrimitive2D(getChildren(), aTransparenceContent));
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return Primitive2DSequence(&xRefB, 1L);
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}
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else
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{
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// completely transparent or invalid definition, add nothing
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return Primitive2DSequence();
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}
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}
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// provide unique ID
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ImplPrimitrive2DIDBlock(UnifiedTransparencePrimitive2D, PRIMITIVE2D_ID_UNIFIEDTRANSPARENCEPRIMITIVE2D)
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} // end of namespace primitive2d
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} // end of namespace drawinglayer
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//////////////////////////////////////////////////////////////////////////////
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// eof
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/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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