bb31fd5873
2005/02/25 12:55:23 dbo 1.2.6.2: #i42443# increasing element resolution, workaround empty polypolygon clipping problem Issue number: Submitted by: Reviewed by: 2005/02/15 12:45:09 thb 1.2.6.1: #i42440# Moved sprite-growing code to slideshow, we already handle the case there for update areas of antialiased shapes; Improved/reformatted documentation; (Hopefully) fixed the problem that sometimes, the first effect preview did not work. The reason there was presumably the clearing of the EventQueue before every slide, and the fact that EventMultiplexer only generated new tick events when it thought ticking was switched off.
261 lines
11 KiB
C++
261 lines
11 KiB
C++
/*************************************************************************
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*
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* $RCSfile: clippingfunctor.cxx,v $
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*
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* $Revision: 1.3 $
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*
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* last change: $Author: vg $ $Date: 2005-03-10 13:50:47 $
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*
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* The Contents of this file are made available subject to the terms of
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* either of the following licenses
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*
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* - GNU Lesser General Public License Version 2.1
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* - Sun Industry Standards Source License Version 1.1
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*
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* Sun Microsystems Inc., October, 2000
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*
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* GNU Lesser General Public License Version 2.1
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* =============================================
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* Copyright 2000 by Sun Microsystems, Inc.
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* 901 San Antonio Road, Palo Alto, CA 94303, USA
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License version 2.1, as published by the Free Software Foundation.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*
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*
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* Sun Industry Standards Source License Version 1.1
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* =================================================
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* The contents of this file are subject to the Sun Industry Standards
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* Source License Version 1.1 (the "License"); You may not use this file
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* except in compliance with the License. You may obtain a copy of the
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* License at http://www.openoffice.org/license.html.
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*
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* Software provided under this License is provided on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING,
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* WITHOUT LIMITATION, WARRANTIES THAT THE SOFTWARE IS FREE OF DEFECTS,
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* MERCHANTABLE, FIT FOR A PARTICULAR PURPOSE, OR NON-INFRINGING.
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* See the License for the specific provisions governing your rights and
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* obligations concerning the Software.
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*
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* The Initial Developer of the Original Code is: Sun Microsystems, Inc.
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*
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* Copyright: 2000 by Sun Microsystems, Inc.
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*
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* All Rights Reserved.
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*
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* Contributor(s): _______________________________________
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*
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*
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************************************************************************/
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#include <canvas/debug.hxx>
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#include "clippingfunctor.hxx"
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#include "transitiontools.hxx"
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namespace presentation
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{
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namespace internal
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{
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ClippingFunctor::ClippingFunctor(const ParametricPolyPolygonSharedPtr& rPolygon,
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const TransitionInfo& rTransitionInfo,
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bool bDirectionForward,
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bool bModeIn ) :
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mpParametricPoly( rPolygon ),
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maStaticTransformation(),
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maBackgroundRect( createUnitRect() ),
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mbForwardParameterSweep( true ),
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mbSubtractPolygon( false ),
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mbScaleIsotrophically( rTransitionInfo.mbScaleIsotrophically ),
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mbFlip(false)
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{
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ENSURE_AND_THROW( rPolygon.get(),
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"ClippingFunctor::ClippingFunctor(): Invalid parametric polygon" );
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// maBackgroundRect serves as the minuent when
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// subtracting a given clip polygon from the
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// background. To speed up the clipper algo, avoid
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// actual intersections of the generated
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// poly-polygon with the minuent - i.e. choose the
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// polygon to subtract from sufficiently large.
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// blow up unit rect to (-1,-1),(2,2)
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::basegfx::B2DHomMatrix aMatrix;
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aMatrix.scale(3.0,3.0);
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aMatrix.translate(-1.0,-1.0);
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maBackgroundRect.transform( aMatrix );
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// extract modification info from maTransitionInfo
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// -----------------------------------------------
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// perform general transformations _before_ the reverse
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// mode changes. This allows the Transition table to be
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// filled more constitently (otherwise, when e.g. rotating
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// a clip 90 degrees, the REVERSEMETHOD_FLIP_X becomes
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// REVERSEMETHOD_FLIP_Y instead)
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if (rTransitionInfo.mnRotationAngle != 0.0 ||
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rTransitionInfo.mnScaleX != 1.0 ||
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rTransitionInfo.mnScaleY != 1.0)
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{
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maStaticTransformation.translate( -0.5, -0.5 );
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// apply further transformations:
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if (rTransitionInfo.mnRotationAngle != 0.0)
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{
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maStaticTransformation.rotate(
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rTransitionInfo.mnRotationAngle*F_PI180 );
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}
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if (rTransitionInfo.mnScaleX != 1.0 ||
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rTransitionInfo.mnScaleY != 1.0)
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{
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maStaticTransformation.scale(
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rTransitionInfo.mnScaleX,
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rTransitionInfo.mnScaleY );
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}
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maStaticTransformation.translate( 0.5, 0.5 );
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}
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if( !bDirectionForward )
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{
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// Client has requested reversed
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// direction. Apply TransitionInfo's choice
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// for that
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switch( rTransitionInfo.meReverseMethod )
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{
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default:
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ENSURE_AND_THROW(
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false,
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"TransitionFactory::TransitionFactory(): Unexpected reverse method" );
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break;
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case TransitionInfo::REVERSEMETHOD_IGNORE:
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break;
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case TransitionInfo::REVERSEMETHOD_INVERT_SWEEP:
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mbForwardParameterSweep = !mbForwardParameterSweep;
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break;
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case TransitionInfo::REVERSEMETHOD_SUBTRACT_POLYGON:
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mbSubtractPolygon = !mbSubtractPolygon;
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break;
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case TransitionInfo::REVERSEMETHOD_SUBTRACT_AND_INVERT:
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mbForwardParameterSweep = !mbForwardParameterSweep;
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mbSubtractPolygon = !mbSubtractPolygon;
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break;
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case TransitionInfo::REVERSEMETHOD_ROTATE_180:
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maStaticTransformation.translate( -0.5, -0.5 );
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maStaticTransformation.rotate( F_PI );
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maStaticTransformation.translate( 0.5, 0.5 );
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break;
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case TransitionInfo::REVERSEMETHOD_FLIP_X:
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maStaticTransformation.scale( -1.0, 1.0 );
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maStaticTransformation.translate( 1.0, 0.0 );
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mbFlip = true;
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break;
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case TransitionInfo::REVERSEMETHOD_FLIP_Y:
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maStaticTransformation.scale( 1.0, -1.0 );
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maStaticTransformation.translate( 0.0, 1.0 );
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mbFlip = true;
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break;
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}
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}
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if( !bModeIn )
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{
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// client has requested 'out' mode. Apply
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// TransitionInfo's method of choice
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if( rTransitionInfo.mbOutInvertsSweep )
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mbForwardParameterSweep = !mbForwardParameterSweep;
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else
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mbSubtractPolygon = !mbSubtractPolygon;
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}
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}
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::basegfx::B2DPolyPolygon ClippingFunctor::operator()( double nValue,
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const ::basegfx::B2DSize& rTargetSize )
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{
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// modify clip polygon according to static
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// transformation plus current shape size
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::basegfx::B2DHomMatrix aMatrix( maStaticTransformation );
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// retrieve current clip polygon
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::basegfx::B2DPolyPolygon aClipPoly = (*mpParametricPoly)(
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mbForwardParameterSweep ? nValue : 1.0 - nValue );
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// TODO(Q4): workaround here, better be fixed in cppcanvas
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if (aClipPoly.count() == 0)
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aClipPoly.append( basegfx::B2DPolygon() );
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if (mbFlip)
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aClipPoly.flip();
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// currently, clipper cannot cope with curves. Subdivide first
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if( aClipPoly.areControlPointsUsed() )
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aClipPoly = ::basegfx::tools::adaptiveSubdivideByAngle(aClipPoly);
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if( mbSubtractPolygon )
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{
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// subtract given polygon from background
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// rect. Do that before any transformations.
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// calc maBackgroundRect \ aClipPoly
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// =================================
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aClipPoly = ::basegfx::tools::correctOrientations( aClipPoly );
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aClipPoly = ::basegfx::tools::removeAllIntersections(aClipPoly);
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aClipPoly = ::basegfx::tools::removeNeutralPolygons(aClipPoly, sal_True);
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aClipPoly.flip();
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::basegfx::B2DPolyPolygon aTmp( maBackgroundRect );
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::std::swap( aClipPoly, aTmp );
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aClipPoly.append( aTmp );
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// TODO(P1): If former aClipPoly is _strictly_ inside
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// maBackgroundRect, no need to remove intersections
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// (but this optimization strictly speaking belongs
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// into removeIntersections...)
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aClipPoly = ::basegfx::tools::removeAllIntersections(aClipPoly);
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aClipPoly = ::basegfx::tools::removeNeutralPolygons(aClipPoly, sal_True);
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// #72995# one more call to resolve self intersections which
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// may have been built by substracting (see bug)
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//aMergePolyPolygonA.Merge(FALSE);
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aClipPoly = ::basegfx::tools::removeAllIntersections(aClipPoly);
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aClipPoly = ::basegfx::tools::removeNeutralPolygons(aClipPoly, sal_True);
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}
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// scale polygon up to current shape size
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if( mbScaleIsotrophically )
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{
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const double nScale( ::std::max( rTargetSize.getX(),
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rTargetSize.getY() ) );
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aMatrix.scale( nScale, nScale );
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aMatrix.translate( -(nScale-rTargetSize.getX())/2.0,
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-(nScale-rTargetSize.getY())/2.0 );
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}
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else
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{
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aMatrix.scale( rTargetSize.getX(),
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rTargetSize.getY() );
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}
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// apply cumulative transformation to clip polygon
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aClipPoly.transform( aMatrix );
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return aClipPoly;
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}
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}
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}
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