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1 : /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
2 : /*
3 : * This file is part of the LibreOffice project.
4 : *
5 : * This Source Code Form is subject to the terms of the Mozilla Public
6 : * License, v. 2.0. If a copy of the MPL was not distributed with this
7 : * file, You can obtain one at http://mozilla.org/MPL/2.0/.
8 : *
9 : * This file incorporates work covered by the following license notice:
10 : *
11 : * Licensed to the Apache Software Foundation (ASF) under one or more
12 : * contributor license agreements. See the NOTICE file distributed
13 : * with this work for additional information regarding copyright
14 : * ownership. The ASF licenses this file to you under the Apache
15 : * License, Version 2.0 (the "License"); you may not use this file
16 : * except in compliance with the License. You may obtain a copy of
17 : * the License at http://www.apache.org/licenses/LICENSE-2.0 .
18 : */
19 :
20 :
21 : #include <canvas/debug.hxx>
22 : #include <basegfx/polygon/b2dpolygon.hxx>
23 : #include <basegfx/polygon/b2dpolygontools.hxx>
24 : #include <basegfx/matrix/b2dhommatrix.hxx>
25 : #include <basegfx/matrix/b2dhommatrixtools.hxx>
26 :
27 : #include <cppcanvas/spritecanvas.hxx>
28 :
29 : #include "combtransition.hxx"
30 :
31 : #include <boost/bind.hpp>
32 :
33 :
34 : namespace slideshow {
35 : namespace internal {
36 :
37 : namespace {
38 :
39 0 : basegfx::B2DPolyPolygon createClipPolygon(
40 : const ::basegfx::B2DVector& rDirection,
41 : const ::basegfx::B2DSize& rSlideSize,
42 : int nNumStrips, int nOffset )
43 : {
44 : // create clip polygon in standard orientation (will later
45 : // be rotated to match direction vector)
46 0 : ::basegfx::B2DPolyPolygon aClipPoly;
47 :
48 : // create nNumStrips/2 vertical strips
49 0 : for( int i=nOffset; i<nNumStrips; i+=2 )
50 : {
51 : aClipPoly.append(
52 : ::basegfx::tools::createPolygonFromRect(
53 : ::basegfx::B2DRectangle( double(i)/nNumStrips, 0.0,
54 0 : double(i+1)/nNumStrips, 1.0) ) );
55 :
56 : }
57 :
58 : // rotate polygons, such that the strips are parallel to
59 : // the given direction vector
60 0 : const ::basegfx::B2DVector aUpVec(0.0, 1.0);
61 0 : basegfx::B2DHomMatrix aMatrix(basegfx::tools::createRotateAroundPoint(0.5, 0.5, aUpVec.angle( rDirection )));
62 :
63 : // blow up clip polygon to slide size
64 : aMatrix.scale( rSlideSize.getX(),
65 0 : rSlideSize.getY() );
66 :
67 0 : aClipPoly.transform( aMatrix );
68 :
69 0 : return aClipPoly;
70 : }
71 :
72 : }
73 :
74 0 : CombTransition::CombTransition(
75 : boost::optional<SlideSharedPtr> const & leavingSlide,
76 : const SlideSharedPtr& pEnteringSlide,
77 : const SoundPlayerSharedPtr& pSoundPlayer,
78 : const UnoViewContainer& rViewContainer,
79 : ScreenUpdater& rScreenUpdater,
80 : EventMultiplexer& rEventMultiplexer,
81 : const ::basegfx::B2DVector& rPushDirection,
82 : sal_Int32 nNumStripes )
83 : : SlideChangeBase( leavingSlide, pEnteringSlide, pSoundPlayer,
84 : rViewContainer, rScreenUpdater, rEventMultiplexer,
85 : false /* no leaving sprite */,
86 : false /* no entering sprite */ ),
87 : maPushDirectionUnit( rPushDirection ),
88 0 : mnNumStripes( nNumStripes )
89 : {
90 0 : }
91 :
92 0 : void CombTransition::renderComb( double t,
93 : const ViewEntry& rViewEntry ) const
94 : {
95 0 : const SlideBitmapSharedPtr& pEnteringBitmap = getEnteringBitmap(rViewEntry);
96 0 : const cppcanvas::CanvasSharedPtr pCanvas_ = rViewEntry.mpView->getCanvas();
97 :
98 0 : if( !pEnteringBitmap || !pCanvas_ )
99 0 : return;
100 :
101 : // calc bitmap offsets. The enter/leaving bitmaps are only
102 : // as large as the actual slides. For scaled-down
103 : // presentations, we have to move the left, top edge of
104 : // those bitmaps to the actual position, governed by the
105 : // given view transform. The aBitmapPosPixel local
106 : // variable is already in device coordinate space
107 : // (i.e. pixel).
108 :
109 : // TODO(F2): Properly respect clip here. Might have to be transformed, too.
110 0 : const basegfx::B2DHomMatrix viewTransform( rViewEntry.mpView->getTransformation() );
111 0 : const basegfx::B2DPoint pageOrigin( viewTransform * basegfx::B2DPoint() );
112 :
113 : // change transformation on cloned canvas to be in
114 : // device pixel
115 0 : cppcanvas::CanvasSharedPtr pCanvas( pCanvas_->clone() );
116 0 : basegfx::B2DPoint p;
117 :
118 : // TODO(Q2): Use basegfx bitmaps here
119 : // TODO(F1): SlideBitmap is not fully portable between different canvases!
120 :
121 : const basegfx::B2DSize enteringSizePixel(
122 0 : getEnteringSlideSizePixel( rViewEntry.mpView) );
123 :
124 : const basegfx::B2DVector aPushDirection = basegfx::B2DVector(
125 0 : enteringSizePixel * maPushDirectionUnit );
126 : const basegfx::B2DPolyPolygon aClipPolygon1 = basegfx::B2DPolyPolygon(
127 : createClipPolygon( maPushDirectionUnit,
128 : enteringSizePixel,
129 0 : mnNumStripes, 0 ) );
130 : const basegfx::B2DPolyPolygon aClipPolygon2 = basegfx::B2DPolyPolygon(
131 : createClipPolygon( maPushDirectionUnit,
132 : enteringSizePixel,
133 0 : mnNumStripes, 1 ) );
134 :
135 0 : SlideBitmapSharedPtr const & pLeavingBitmap = getLeavingBitmap(rViewEntry);
136 0 : if( pLeavingBitmap )
137 : {
138 : // render odd strips:
139 0 : pLeavingBitmap->clip( aClipPolygon1 );
140 : // don't modify bitmap object (no move!):
141 0 : p = basegfx::B2DPoint( pageOrigin + (t * aPushDirection) );
142 0 : pCanvas->setTransformation(basegfx::tools::createTranslateB2DHomMatrix(p.getX(), p.getY()));
143 0 : pLeavingBitmap->draw( pCanvas );
144 :
145 : // render even strips:
146 0 : pLeavingBitmap->clip( aClipPolygon2 );
147 : // don't modify bitmap object (no move!):
148 0 : p = basegfx::B2DPoint( pageOrigin - (t * aPushDirection) );
149 0 : pCanvas->setTransformation(basegfx::tools::createTranslateB2DHomMatrix(p.getX(), p.getY()));
150 0 : pLeavingBitmap->draw( pCanvas );
151 : }
152 :
153 : // TODO(Q2): Use basegfx bitmaps here
154 : // TODO(F1): SlideBitmap is not fully portable between different canvases!
155 :
156 : // render odd strips:
157 0 : pEnteringBitmap->clip( aClipPolygon1 );
158 : // don't modify bitmap object (no move!):
159 0 : p = basegfx::B2DPoint( pageOrigin + ((t - 1.0) * aPushDirection) );
160 0 : pCanvas->setTransformation(basegfx::tools::createTranslateB2DHomMatrix(p.getX(), p.getY()));
161 0 : pEnteringBitmap->draw( pCanvas );
162 :
163 : // render even strips:
164 0 : pEnteringBitmap->clip( aClipPolygon2 );
165 : // don't modify bitmap object (no move!):
166 0 : p = basegfx::B2DPoint( pageOrigin + ((1.0 - t) * aPushDirection) );
167 0 : pCanvas->setTransformation(basegfx::tools::createTranslateB2DHomMatrix(p.getX(), p.getY()));
168 0 : pEnteringBitmap->draw( pCanvas );
169 : }
170 :
171 0 : bool CombTransition::operator()( double t )
172 : {
173 : std::for_each( beginViews(),
174 : endViews(),
175 : boost::bind( &CombTransition::renderComb,
176 : this,
177 : t,
178 0 : _1 ));
179 :
180 0 : getScreenUpdater().notifyUpdate();
181 :
182 0 : return true;
183 : }
184 :
185 : } // namespace internal
186 0 : } // namespace presentation
187 :
188 : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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