kwin/effects/_test/flame.cpp

/*****************************************************************
 KWin - the KDE window manager
 This file is part of the KDE project.

Copyright (C) 2007 Lubos Lunak <l.lunak@kde.org>

You can Freely distribute this program under the GNU General Public
License. See the file "COPYING" for the exact licensing terms.
******************************************************************/

#include "flame.h"

#include <assert.h>
#include <kdebug.h>

namespace KWin
{

KWIN_EFFECT(flame, FlameEffect)

void FlameEffect::prePaintScreen(ScreenPrePaintData& data, int time)
{
    if (!windows.isEmpty())
        data.mask |= PAINT_SCREEN_WITH_TRANSFORMED_WINDOWS;
    effects->prePaintScreen(data, time);
}

void FlameEffect::prePaintWindow(EffectWindow* w, WindowPrePaintData& data, int time)
{
    if (windows.contains(w)) {
        if (windows[ w ] < 1) {
            windows[ w ] += time / 500.;
            data.setTransformed();
            w->enablePainting(EffectWindow::PAINT_DISABLED_BY_DELETE);
            data.quads = data.quads.splitAtY(windows[ w ] * w->height());
        } else {
            windows.remove(w);
            w->unrefWindow();
        }
    }
    effects->prePaintWindow(w, data, time);
}

void FlameEffect::paintWindow(EffectWindow* w, int mask, QRegion region, WindowPaintData& data)
{
    if (windows.contains(w)) {
        WindowQuadList new_quads;
        double ylimit = windows[ w ] * w->height(); // parts above this are already away
        foreach (const WindowQuad & quad, data.quads) {
            if (quad.bottom() <= ylimit)
                continue;
            new_quads.append(quad);
        }
        if (new_quads.isEmpty())
            return; // nothing to paint
        data.quads = new_quads;
    }
    effects->paintWindow(w, mask, region, data);
}

void FlameEffect::postPaintWindow(EffectWindow* w)
{
    if (windows.contains(w))
        effects->addRepaint(w->geometry());  // workspace, since the window under it will need painting too
    effects->postPaintScreen();
}

void FlameEffect::windowClosed(EffectWindow* c)
{
    windows[ c ] = 0;
    c->refWindow();
}

void FlameEffect::windowDeleted(EffectWindow* c)
{
    windows.remove(c);
}

} // namespace