1 /**************************************************************
2 *
3 * Licensed to the Apache Software Foundation (ASF) under one
4 * or more contributor license agreements. See the NOTICE file
5 * distributed with this work for additional information
6 * regarding copyright ownership. The ASF licenses this file
7 * to you under the Apache License, Version 2.0 (the
8 * "License"); you may not use this file except in compliance
9 * with the License. You may obtain a copy of the License at
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11 * http://www.apache.org/licenses/LICENSE-2.0
12 *
13 * Unless required by applicable law or agreed to in writing,
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15 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
16 * KIND, either express or implied. See the License for the
17 * specific language governing permissions and limitations
18 * under the License.
19 *
20 *************************************************************/
21
22
23
24 // MARKER(update_precomp.py): autogen include statement, do not remove
25 #include "precompiled_slideshow.hxx"
26
27 #include <canvas/debug.hxx>
28 #include <basegfx/matrix/b2dhommatrix.hxx>
29 #include <basegfx/point/b2dpoint.hxx>
30 #include "doublediamondwipe.hxx"
31
32
33 namespace slideshow {
34 namespace internal {
35
operator ()(double t)36 ::basegfx::B2DPolyPolygon DoubleDiamondWipe::operator () ( double t )
37 {
38 // outer:
39 const double a = ::basegfx::pruneScaleValue( 0.25 + (t * 0.75) );
40 ::basegfx::B2DPolygon poly;
41 poly.append( ::basegfx::B2DPoint( 0.5 + a, 0.5 ) );
42 poly.append( ::basegfx::B2DPoint( 0.5, 0.5 - a ) );
43 poly.append( ::basegfx::B2DPoint( 0.5 - a, 0.5 ) );
44 poly.append( ::basegfx::B2DPoint( 0.5, 0.5 + a ) );
45 poly.setClosed(true);
46 ::basegfx::B2DPolyPolygon res(poly);
47
48 // inner (reverse order to clip):
49 const double b = ::basegfx::pruneScaleValue( (1.0 - t) * 0.25 );
50 poly.clear();
51 poly.append( ::basegfx::B2DPoint( 0.5 + b, 0.5 ) );
52 poly.append( ::basegfx::B2DPoint( 0.5, 0.5 + b ) );
53 poly.append( ::basegfx::B2DPoint( 0.5 - b, 0.5 ) );
54 poly.append( ::basegfx::B2DPoint( 0.5, 0.5 - b ) );
55 poly.setClosed(true);
56 res.append(poly);
57
58 return res;
59 }
60
61 }
62 }
63