1*70f497fbSAndrew Rist /**************************************************************
2cdf0e10cSrcweir *
3*70f497fbSAndrew Rist * Licensed to the Apache Software Foundation (ASF) under one
4*70f497fbSAndrew Rist * or more contributor license agreements. See the NOTICE file
5*70f497fbSAndrew Rist * distributed with this work for additional information
6*70f497fbSAndrew Rist * regarding copyright ownership. The ASF licenses this file
7*70f497fbSAndrew Rist * to you under the Apache License, Version 2.0 (the
8*70f497fbSAndrew Rist * "License"); you may not use this file except in compliance
9*70f497fbSAndrew Rist * with the License. You may obtain a copy of the License at
10*70f497fbSAndrew Rist *
11*70f497fbSAndrew Rist * http://www.apache.org/licenses/LICENSE-2.0
12*70f497fbSAndrew Rist *
13*70f497fbSAndrew Rist * Unless required by applicable law or agreed to in writing,
14*70f497fbSAndrew Rist * software distributed under the License is distributed on an
15*70f497fbSAndrew Rist * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
16*70f497fbSAndrew Rist * KIND, either express or implied. See the License for the
17*70f497fbSAndrew Rist * specific language governing permissions and limitations
18*70f497fbSAndrew Rist * under the License.
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20*70f497fbSAndrew Rist *************************************************************/
21*70f497fbSAndrew Rist
22*70f497fbSAndrew Rist
23cdf0e10cSrcweir
24cdf0e10cSrcweir // MARKER(update_precomp.py): autogen include statement, do not remove
25cdf0e10cSrcweir #include "precompiled_slideshow.hxx"
26cdf0e10cSrcweir
27cdf0e10cSrcweir #include <canvas/debug.hxx>
28cdf0e10cSrcweir #include <basegfx/matrix/b2dhommatrix.hxx>
29cdf0e10cSrcweir #include <basegfx/point/b2dpoint.hxx>
30cdf0e10cSrcweir #include "doublediamondwipe.hxx"
31cdf0e10cSrcweir
32cdf0e10cSrcweir
33cdf0e10cSrcweir namespace slideshow {
34cdf0e10cSrcweir namespace internal {
35cdf0e10cSrcweir
operator ()(double t)36cdf0e10cSrcweir ::basegfx::B2DPolyPolygon DoubleDiamondWipe::operator () ( double t )
37cdf0e10cSrcweir {
38cdf0e10cSrcweir // outer:
39cdf0e10cSrcweir const double a = ::basegfx::pruneScaleValue( 0.25 + (t * 0.75) );
40cdf0e10cSrcweir ::basegfx::B2DPolygon poly;
41cdf0e10cSrcweir poly.append( ::basegfx::B2DPoint( 0.5 + a, 0.5 ) );
42cdf0e10cSrcweir poly.append( ::basegfx::B2DPoint( 0.5, 0.5 - a ) );
43cdf0e10cSrcweir poly.append( ::basegfx::B2DPoint( 0.5 - a, 0.5 ) );
44cdf0e10cSrcweir poly.append( ::basegfx::B2DPoint( 0.5, 0.5 + a ) );
45cdf0e10cSrcweir poly.setClosed(true);
46cdf0e10cSrcweir ::basegfx::B2DPolyPolygon res(poly);
47cdf0e10cSrcweir
48cdf0e10cSrcweir // inner (reverse order to clip):
49cdf0e10cSrcweir const double b = ::basegfx::pruneScaleValue( (1.0 - t) * 0.25 );
50cdf0e10cSrcweir poly.clear();
51cdf0e10cSrcweir poly.append( ::basegfx::B2DPoint( 0.5 + b, 0.5 ) );
52cdf0e10cSrcweir poly.append( ::basegfx::B2DPoint( 0.5, 0.5 + b ) );
53cdf0e10cSrcweir poly.append( ::basegfx::B2DPoint( 0.5 - b, 0.5 ) );
54cdf0e10cSrcweir poly.append( ::basegfx::B2DPoint( 0.5, 0.5 - b ) );
55cdf0e10cSrcweir poly.setClosed(true);
56cdf0e10cSrcweir res.append(poly);
57cdf0e10cSrcweir
58cdf0e10cSrcweir return res;
59cdf0e10cSrcweir }
60cdf0e10cSrcweir
61cdf0e10cSrcweir }
62cdf0e10cSrcweir }
63