1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
|
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* This file incorporates work covered by the following license notice:
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed
* with this work for additional information regarding copyright
* ownership. The ASF licenses this file to you under the Apache
* License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0 .
*/
#include <basegfx/polygon/b2dpolygon.hxx>
#include <basegfx/polygon/b2dpolygontools.hxx>
#include <basegfx/matrix/b2dhommatrix.hxx>
#include <basegfx/matrix/b2dhommatrixtools.hxx>
#include "combtransition.hxx"
namespace slideshow {
namespace internal {
namespace {
basegfx::B2DPolyPolygon createClipPolygon(
const ::basegfx::B2DVector& rDirection,
const ::basegfx::B2DSize& rSlideSize,
int nNumStrips, int nOffset )
{
// create clip polygon in standard orientation (will later
// be rotated to match direction vector)
::basegfx::B2DPolyPolygon aClipPoly;
// create nNumStrips/2 vertical strips
for( int i=nOffset; i<nNumStrips; i+=2 )
{
aClipPoly.append(
::basegfx::utils::createPolygonFromRect(
::basegfx::B2DRectangle( double(i)/nNumStrips, 0.0,
double(i+1)/nNumStrips, 1.0) ) );
}
// rotate polygons, such that the strips are parallel to
// the given direction vector
const ::basegfx::B2DVector aUpVec(0.0, 1.0);
basegfx::B2DHomMatrix aMatrix(basegfx::utils::createRotateAroundPoint(0.5, 0.5, aUpVec.angle( rDirection )));
// blow up clip polygon to slide size
aMatrix.scale( rSlideSize.getX(),
rSlideSize.getY() );
aClipPoly.transform( aMatrix );
return aClipPoly;
}
}
CombTransition::CombTransition(
o3tl::optional<SlideSharedPtr> const & leavingSlide,
const SlideSharedPtr& pEnteringSlide,
const SoundPlayerSharedPtr& pSoundPlayer,
const UnoViewContainer& rViewContainer,
ScreenUpdater& rScreenUpdater,
EventMultiplexer& rEventMultiplexer,
const ::basegfx::B2DVector& rPushDirection,
sal_Int32 nNumStripes )
: SlideChangeBase( leavingSlide, pEnteringSlide, pSoundPlayer,
rViewContainer, rScreenUpdater, rEventMultiplexer,
false /* no leaving sprite */,
false /* no entering sprite */ ),
maPushDirectionUnit( rPushDirection ),
mnNumStripes( nNumStripes )
{
}
void CombTransition::renderComb( double t,
const ViewEntry& rViewEntry ) const
{
const SlideBitmapSharedPtr& pEnteringBitmap = getEnteringBitmap(rViewEntry);
const cppcanvas::CanvasSharedPtr pCanvas_ = rViewEntry.mpView->getCanvas();
if( !pEnteringBitmap || !pCanvas_ )
return;
// calc bitmap offsets. The enter/leaving bitmaps are only
// as large as the actual slides. For scaled-down
// presentations, we have to move the left, top edge of
// those bitmaps to the actual position, governed by the
// given view transform. The aBitmapPosPixel local
// variable is already in device coordinate space
// (i.e. pixel).
// TODO(F2): Properly respect clip here. Might have to be transformed, too.
const basegfx::B2DHomMatrix viewTransform( rViewEntry.mpView->getTransformation() );
const basegfx::B2DPoint pageOrigin( viewTransform * basegfx::B2DPoint() );
// change transformation on cloned canvas to be in
// device pixel
cppcanvas::CanvasSharedPtr pCanvas( pCanvas_->clone() );
basegfx::B2DPoint p;
// TODO(Q2): Use basegfx bitmaps here
// TODO(F1): SlideBitmap is not fully portable between different canvases!
const basegfx::B2DSize enteringSizePixel(
getEnteringSlideSizePixel( rViewEntry.mpView) );
const basegfx::B2DVector aPushDirection(
enteringSizePixel * maPushDirectionUnit );
const basegfx::B2DPolyPolygon aClipPolygon1 =
createClipPolygon( maPushDirectionUnit,
enteringSizePixel,
mnNumStripes, 0 );
const basegfx::B2DPolyPolygon aClipPolygon2 =
createClipPolygon( maPushDirectionUnit,
enteringSizePixel,
mnNumStripes, 1 );
SlideBitmapSharedPtr const & pLeavingBitmap = getLeavingBitmap(rViewEntry);
if( pLeavingBitmap )
{
// render odd strips:
pLeavingBitmap->clip( aClipPolygon1 );
// don't modify bitmap object (no move!):
p = basegfx::B2DPoint( pageOrigin + (t * aPushDirection) );
pCanvas->setTransformation(basegfx::utils::createTranslateB2DHomMatrix(p.getX(), p.getY()));
pLeavingBitmap->draw( pCanvas );
// render even strips:
pLeavingBitmap->clip( aClipPolygon2 );
// don't modify bitmap object (no move!):
p = basegfx::B2DPoint( pageOrigin - (t * aPushDirection) );
pCanvas->setTransformation(basegfx::utils::createTranslateB2DHomMatrix(p.getX(), p.getY()));
pLeavingBitmap->draw( pCanvas );
}
// TODO(Q2): Use basegfx bitmaps here
// TODO(F1): SlideBitmap is not fully portable between different canvases!
// render odd strips:
pEnteringBitmap->clip( aClipPolygon1 );
// don't modify bitmap object (no move!):
p = basegfx::B2DPoint( pageOrigin + ((t - 1.0) * aPushDirection) );
pCanvas->setTransformation(basegfx::utils::createTranslateB2DHomMatrix(p.getX(), p.getY()));
pEnteringBitmap->draw( pCanvas );
// render even strips:
pEnteringBitmap->clip( aClipPolygon2 );
// don't modify bitmap object (no move!):
p = basegfx::B2DPoint( pageOrigin + ((1.0 - t) * aPushDirection) );
pCanvas->setTransformation(basegfx::utils::createTranslateB2DHomMatrix(p.getX(), p.getY()));
pEnteringBitmap->draw( pCanvas );
}
bool CombTransition::operator()( double t )
{
std::for_each( beginViews(),
endViews(),
[this, &t]( const ViewEntry& rViewEntry )
{ return this->renderComb( t, rViewEntry ); } );
getScreenUpdater().notifyUpdate();
return true;
}
} // namespace internal
} // namespace presentation
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
|
