workspace/kwin/effects/snow.h

   1 /********************************************************************
   2  KWin - the KDE window manager
   3  This file is part of the KDE project.
   4
   5  Copyright (C) 2007 Martin Gräßlin <ubuntu@martin-graesslin.com>
   6  Copyright (C) 2008 Torgny Johansson <torgny.johansson@gmail.com>
   7
   8 This program is free software; you can redistribute it and/or modify
   9 it under the terms of the GNU General Public License as published by
  10 the Free Software Foundation; either version 2 of the License, or
  11 (at your option) any later version.
  12
  13 This program is distributed in the hope that it will be useful,
  14 but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 GNU General Public License for more details.
  17
  18 You should have received a copy of the GNU General Public License
  19 along with this program.  If not, see <http://www.gnu.org/licenses/>.
  20 *********************************************************************/
  21
  22
  23 #ifndef KWIN_SNOW_H
  24 #define KWIN_SNOW_H
  25
  26 #include <kwineffects.h>
  27 #include <kwinglutils.h>
  28 #include <qobject.h>
  29
  30 #include <QList>
  31
  32 namespace KWin
  33 {
  34
  35 class SnowFlake
  36     {
  37     public:
  38         SnowFlake(int x, int y, int width, int height, int maxVSpeed, int maxHSpeed);
  39         virtual ~SnowFlake();
  40         int getHSpeed();
  41         int getVSpeed();
  42         float getRotationAngle();
  43         float getRotationSpeed();
  44         void updateSpeedAndRotation();
  45         int addFrame();
  46         int getHeight();
  47         int getWidth();
  48         int getX();
  49         int getY();
  50         int getFrames();
  51         QRect getRect();
  52         void setHeight(int height);
  53         void setWidth(int width);
  54         void setX(int x);
  55         void setY(int y);
  56
  57     private:
  58         QRect rect;
  59         int vSpeed;
  60         int hSpeed;
  61         int frameCounter;
  62         int maxFrames;
  63         float rotationAngle;
  64         float rotationSpeed;
  65     };
  66
  67 class SnowEffect
  68     : public QObject, public Effect
  69     {
  70     Q_OBJECT
  71     public:
  72         SnowEffect();
  73         virtual ~SnowEffect();
  74         virtual void reconfigure( ReconfigureFlags );
  75         virtual void prePaintScreen( ScreenPrePaintData& data, int time );
  76         virtual void paintScreen( int mask, QRegion region, ScreenPaintData& data );
  77         virtual void postPaintScreen();
  78         virtual void paintWindow( EffectWindow* w, int mask, QRegion region, WindowPaintData& data );
  79
  80         static bool supported();
  81     private slots:
  82         void toggle();
  83     private:
  84         void loadTexture();
  85         void snowing( QRegion& region );
  86         bool loadShader();
  87         GLTexture* texture;
  88         QList<SnowFlake> flakes;
  89         long nextFlakeMillis;
  90         int mNumberFlakes;
  91         int mMinFlakeSize;
  92         int mMaxFlakeSize;
  93         int mMaxVSpeed;
  94         int mMaxHSpeed;
  95         bool active;
  96         GLuint list;
  97         bool snowBehindWindows;
  98         GLShader* mShader;
  99         bool mInited;
 100         bool mUseShader;
 101         QRegion repaintRegion;
 102         bool hasSnown;
 103     };
 104
 105 } // namespace
 106
 107 #endif