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/*****************************************************************************
* Copyright 2007 - 2010 Craig Drummond <craig.p.drummond@gmail.com> *
* Copyright 2013 - 2015 Yichao Yu <yyc1992@gmail.com> *
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU Lesser General Public License as *
* published by the Free Software Foundation; either version 2.1 of the *
* License, or (at your option) version 3, or any later version accepted *
* by the membership of KDE e.V. (or its successor approved by the *
* membership of KDE e.V.), which shall act as a proxy defined in *
* Section 6 of version 3 of the license. *
* *
* This program is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU *
* Lesser General Public License for more details. *
* *
* You should have received a copy of the GNU Lesser General Public *
* License along with this library. If not, *
* see <http://www.gnu.org/licenses/>. *
*****************************************************************************/
#ifndef __QTCURVESHADOWCACHE_H__
#define __QTCURVESHADOWCACHE_H__
//////////////////////////////////////////////////////////////////////////////
// Taken from: oxygenshadowcache.h
// handles caching of TileSet objects to draw shadows
// -------------------
//
// Copyright (c) 2009 Hugo Pereira Da Costa <hugo.pereira@free.fr>
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to
// deal in the Software without restriction, including without limitation the
// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
// sell copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
// IN THE SOFTWARE.
//////////////////////////////////////////////////////////////////////////////
//#define NEW_SHADOWS
#include "qtcurveshadowconfiguration.h"
#include "tileset.h"
#include <qtcurve-utils/number.h>
#include <QCache>
#include <QRadialGradient>
#include <cmath>
class QtCurveHelper;
namespace QtCurve {
namespace KWin {
class QtCurveClient;
class QtCurveShadowCache {
public:
QtCurveShadowCache();
const QColor&
color(bool active)
{
return (active ? m_activeShadowConfig.color() :
m_inactiveShadowConfig.color());
}
void
invalidateCaches()
{
m_shadowCache.clear();
}
//! returns true if provided shadow configuration changes with respect to
// stored
/*!
* use ShadowConfig::colorRole() to decide whether it should be stored
* as active or inactive
*/
bool shadowConfigChanged(const ShadowConfig &other) const;
//! set shadowConfiguration
/*!
* use ShadowConfig::colorRole() to decide whether it should be stored
* as active or inactive
*/
void setShadowConfig(const ShadowConfig &other);
//! shadow size
qreal
shadowSize() const
{
qreal size(qMax(m_activeShadowConfig.shadowSize(),
m_inactiveShadowConfig.shadowSize()));
// even if shadows are disabled, you need a minimum size to allow
// corner rendering
return qMax(size, 5.0);
}
TileSet *tileSet(const QtCurveClient *client, bool roundAllCorners);
//! Key class to be used into QCache
/*! class is entirely inline for optimization */
class Key {
public:
explicit Key() : active(false), isShade(false) {}
Key(const QtCurveClient *client);
Key(int hash) : active((hash >> 1) & 1), isShade(hash & 1) {}
int hash() const
{
return (active << 1) | isShade;
}
const bool active;
const bool isShade;
};
class Parabolic {
public:
//! constructor
Parabolic(qreal amplitude, qreal width)
: m_amplitude(amplitude), m_width(width) {}
//! value
qreal
operator() (qreal x) const
{
return qMax(0.0, m_amplitude * (1.0 - qtcSquare(x / m_width)));
}
private:
const qreal m_amplitude;
const qreal m_width;
};
class Gaussian {
public:
Gaussian(qreal amplitude, qreal width)
: m_amplitude(amplitude), m_width(width) {}
//! value
qreal
operator() (qreal x) const
{
return qMax(0.0, m_amplitude *
(std::exp(-qtcSquare(x / m_width) - 0.05)));
}
private:
const qreal m_amplitude;
const qreal m_width;
};
//! complex pixmap (when needed)
QPixmap shadowPixmap(const QtCurveClient *client, bool active,
bool roundAllCorners) const;
//! simple pixmap
QPixmap simpleShadowPixmap(const QColor &color, bool active,
bool roundAllCorners) const;
void reset() { m_shadowCache.clear(); }
private:
//! draw gradient into rect
/*! a separate method is used in order to properly account for corners */
void renderGradient(QPainter &p, const QRectF &rect,
const QRadialGradient &rg, bool hasBorder) const;
typedef QCache<int, TileSet> TileSetCache;
ShadowConfig m_activeShadowConfig;
ShadowConfig m_inactiveShadowConfig;
TileSetCache m_shadowCache;
};
}
}
#endif
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