workspace/kwin/effects/test/demo_wavywindows.cpp

   1 /********************************************************************
   2  KWin - the KDE window manager
   3  This file is part of the KDE project.
   4
   5 Copyright (C) 2007 Rivo Laks <rivolaks@hot.ee>
   6
   7 This program is free software; you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation; either version 2 of the License, or
  10 (at your option) any later version.
  11
  12 This program is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19 *********************************************************************/
  20
  21 #include "demo_wavywindows.h"
  22
  23 #include <math.h>
  24
  25
  26 namespace KWin
  27 {
  28
  29 KWIN_EFFECT( demo_wavywindows, WavyWindowsEffect )
  30
  31 WavyWindowsEffect::WavyWindowsEffect()
  32     {
  33     mTimeElapsed = 0.0f;
  34     }
  35
  36
  37 void WavyWindowsEffect::prePaintScreen( ScreenPrePaintData& data, int time )
  38     {
  39     // Adjust elapsed time
  40     mTimeElapsed += (time / 1000.0f);
  41     // We need to mark the screen windows as transformed. Otherwise the whole
  42     //  screen won't be repainted, resulting in artefacts
  43     data.mask |= PAINT_SCREEN_WITH_TRANSFORMED_WINDOWS;
  44
  45     effects->prePaintScreen(data, time);
  46     }
  47
  48 void WavyWindowsEffect::prePaintWindow( EffectWindow* w, WindowPrePaintData& data, int time )
  49     {
  50     // This window will be transformed by the effect
  51     data.setTransformed();
  52     // Check if OpenGL compositing is used
  53     // Request the window to be divided into cells which are at most 30x30
  54     //  pixels big
  55     data.quads = data.quads.makeGrid( 30 );
  56
  57     effects->prePaintWindow( w, data, time );
  58     }
  59
  60 void WavyWindowsEffect::paintWindow( EffectWindow* w, int mask, QRegion region, WindowPaintData& data )
  61     {
  62     // Make sure we have OpenGL compositing and the window is vidible and not a
  63     //  special window
  64 // TODO    if( w->isVisible() && !w->isSpecialWindow() )
  65     if( !w->isSpecialWindow() )
  66         {
  67         // We have OpenGL compositing and the window has been subdivided
  68         //  because of our request (in pre-paint pass)
  69         // Transform all the vertices to create wavy effect
  70         for( int i = 0;
  71              i < data.quads.count();
  72              ++i )
  73             for( int j = 0;
  74                  j < 4;
  75                  ++j )
  76                 {
  77                 WindowVertex& v = data.quads[ i ][ j ];
  78                 v.move( v.x() + sin(mTimeElapsed + v.originalY() / 60 + 0.5f) * 10,
  79                     v.y() + sin(mTimeElapsed + v.originalX() / 80) * 10 );
  80             }
  81         }
  82
  83     // Call the next effect.
  84     effects->paintWindow( w, mask, region, data );
  85     }
  86
  87 void WavyWindowsEffect::postPaintScreen()
  88     {
  89     // Repaint the workspace so that everything would be repainted next time
  90     effects->addRepaintFull();
  91
  92     // Call the next effect.
  93     effects->postPaintScreen();
  94     }
  95
  96 } // namespace
  97