415 lines
13 KiB
C++
415 lines
13 KiB
C++
//////////////////////////////////////////////////////////////////////////////
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// oxygenshadowcache.cpp
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// handles caching of TileSet objects to draw shadows
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// -------------------
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//
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// Copyright (c) 2009 Hugo Pereira Da Costa <hugo.pereira@free.fr>
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to
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// deal in the Software without restriction, including without limitation the
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// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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// sell copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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// IN THE SOFTWARE.
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//////////////////////////////////////////////////////////////////////////////
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#include "oxygenshadowcache.h"
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#include "oxygenclient.h"
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#include "oxygen.h"
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#include <cassert>
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#include <KColorUtils>
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#include <KDebug>
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#include <QtGui/QPainter>
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namespace Oxygen
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{
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//_______________________________________________________
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OxygenShadowCache::OxygenShadowCache( int maxIndex ):
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maxIndex_( maxIndex ),
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activeShadowConfiguration_( OxygenShadowConfiguration( QPalette::Active ) ),
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inactiveShadowConfiguration_( OxygenShadowConfiguration( QPalette::Inactive ) )
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{
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kDebug(1212) << endl;
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shadowCache_.setMaxCost( 1<<6 );
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animatedShadowCache_.setMaxCost( maxIndex_<<6 );
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}
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//_______________________________________________________
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bool OxygenShadowCache::shadowConfigurationChanged( const OxygenShadowConfiguration& other ) const
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{
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const OxygenShadowConfiguration& local = (other.colorGroup() == QPalette::Active ) ? activeShadowConfiguration_:inactiveShadowConfiguration_;
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return !(local == other);
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}
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//_______________________________________________________
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void OxygenShadowCache::setShadowConfiguration( const OxygenShadowConfiguration& other )
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{
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OxygenShadowConfiguration& local = (other.colorGroup() == QPalette::Active ) ? activeShadowConfiguration_:inactiveShadowConfiguration_;
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local = other;
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}
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//_______________________________________________________
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TileSet* OxygenShadowCache::tileSet( const OxygenClient* client )
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{
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// construct key
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Key key( client );
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// check if tileset already in cache
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int hash( key.hash() );
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if( shadowCache_.contains(hash) ) return shadowCache_.object(hash);
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// create tileset otherwise
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qreal size( shadowSize() );
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TileSet* tileSet = new TileSet( shadowPixmap( client, key.active ), size, size, 1, 1);
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shadowCache_.insert( hash, tileSet );
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return tileSet;
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}
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//_______________________________________________________
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TileSet* OxygenShadowCache::tileSet( const OxygenClient* client, int index )
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{
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assert( index <= maxIndex_ );
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// construct key
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Key key( client );
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key.index = index;
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// check if tileset already in cache
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int hash( key.hash() );
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if( animatedShadowCache_.contains(hash) ) return animatedShadowCache_.object(hash);
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// create shadow and tileset otherwise
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qreal size( shadowSize() );
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qreal opacity( qreal(index)/qreal(maxIndex_) );
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QPixmap shadow( size*2, size*2 );
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shadow.fill( Qt::transparent );
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QPainter p( &shadow );
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p.setRenderHint( QPainter::Antialiasing );
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p.setOpacity( 1.0 - opacity );
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p.drawPixmap( QPointF(0,0), shadowPixmap( client, false ) );
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p.setOpacity( opacity );
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p.drawPixmap( QPointF(0,0), shadowPixmap( client, true ) );
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p.end();
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TileSet* tileSet = new TileSet(shadow, size, size, 1, 1);
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animatedShadowCache_.insert( hash, tileSet );
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return tileSet;
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}
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//_________________________________________________________________
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QPixmap OxygenShadowCache::shadowPixmap(const OxygenClient* client, bool active ) const
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{
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// get window color
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Key key( client );
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QPalette palette( client->backgroundPalette( client->widget(), client->widget()->palette() ) );
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QColor color( palette.color( client->widget()->backgroundRole() ) );
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if( active && client->configuration().drawTitleOutline() && client->configuration().frameBorder() == OxygenConfiguration::BorderNone )
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{
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// a more complex tile set is needed for the configuration above:
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// top corners must be beveled with the "active titlebar color" while
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// bottom corners must be beveled with the "window background color".
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// this requires generating two shadow pixmaps and tiling them in the tileSet.
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qreal size( shadowSize() );
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QPixmap shadow( 2*size, 2*size );
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shadow.fill( Qt::transparent );
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QPainter p( &shadow );
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p.setRenderHint( QPainter::Antialiasing );
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QPixmap shadowTop = simpleShadowPixmap( color, key, active );
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QRect topRect( shadow.rect() );
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topRect.setBottom( int( size )-1 );
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p.setClipRect( topRect );
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p.drawPixmap( QPointF( 0, 0 ), shadowTop );
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// get window color
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palette = client->widget()->palette();
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color = palette.color( client->widget()->backgroundRole() );
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QPixmap shadowBottom = simpleShadowPixmap( color, key, active );
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QRect bottomRect( shadow.rect() );
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bottomRect.setTop( int( size ) );
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p.setClipRect( bottomRect );
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p.drawPixmap( QPointF( 0, 0 ), shadowBottom );
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p.end();
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return shadow;
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} else return simpleShadowPixmap( color, key, active );
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}
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//_______________________________________________________
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QPixmap OxygenShadowCache::simpleShadowPixmap( const QColor& color, const Key& key, bool active ) const
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{
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// local reference to relevant shadow configuration
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const OxygenShadowConfiguration& shadowConfiguration(
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active && key.useOxygenShadows ?
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activeShadowConfiguration_:inactiveShadowConfiguration_ );
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static const qreal fixedSize = 25.5;
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qreal size( shadowSize() );
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qreal shadowSize( shadowConfiguration.shadowSize() );
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QPixmap shadow = QPixmap( size*2, size*2 );
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shadow.fill( Qt::transparent );
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QPainter p( &shadow );
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p.setRenderHint( QPainter::Antialiasing );
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p.setPen( Qt::NoPen );
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// offsets are scaled with the shadow size
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// so that the ratio Top-shadow/Bottom-shadow is kept constant
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// when shadow size is changed
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qreal hoffset = shadowConfiguration.horizontalOffset()*shadowSize/fixedSize;
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qreal voffset = shadowConfiguration.verticalOffset()*shadowSize/fixedSize;
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// some gradients rendering are different at bottom corners for NoBorders windows
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bool noBorder( key.frameBorder == Key::BorderNone && !key.isShade );
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if( active && key.useOxygenShadows )
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{
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{
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int nPoints = 5;
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int values[5] = {255, 220, 180, 25, 0};
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qreal x[5] = {4.4, 4.5, 5, 5.5, 6.5};
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// the first point of this gradient does not scaled
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QRadialGradient rg( size, size, shadowSize );
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QColor c = color;
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for( int i = 0; i<nPoints; i++ )
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{ c.setAlpha( values[i] ); rg.setColorAt( x[0]/shadowSize+(x[i]-x[0])/fixedSize, c ); }
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renderGradient( p, shadow.rect(), rg, noBorder );
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}
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{
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// this gradient scales with shadow size
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int nPoints = 8;
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qreal values[8] = {1, 0.58, 0.43, 0.30, 0.22, 0.15, 0.08, 0 };
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qreal x[8] = {0, 4.5, 5.5, 6.5, 7.5, 8.5, 11.5, 14.4};
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// this gradient scales with shadow size
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QRadialGradient rg( size+hoffset, size+voffset, shadowSize );
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QColor c = shadowConfiguration.innerColor();
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for( int i = 0; i<nPoints; i++ )
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{ c.setAlphaF( values[i] ); rg.setColorAt( x[i]/fixedSize, c ); }
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p.setBrush( rg );
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p.drawRect( shadow.rect() );
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}
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} else {
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{
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int nPoints = 9;
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qreal values[9] = { 0.17, 0.12, 0.11, 0.075, 0.06, 0.035, 0.025, 0.01, 0 };
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qreal x[9] = {0, 4.5, 6.6, 8.5, 11.5, 14.5, 17.5, 21.5, 25.5 };
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QRadialGradient rg = QRadialGradient( size+20.0*hoffset, size+20.0*voffset, shadowSize );
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QColor c = shadowConfiguration.outerColor();
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for( int i = 0; i<nPoints; i++ )
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{ c.setAlphaF( values[i] ); rg.setColorAt( x[i]/fixedSize, c ); }
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p.setBrush( rg );
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p.drawRect( shadow.rect() );
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}
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{
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int nPoints = 7;
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qreal values[7] = {0.55, 0.25, 0.20, 0.1, 0.06, 0.015, 0 };
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qreal x[7] = {0, 4.5, 5.5, 7.5, 8.5, 11.5, 14.5 };
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QRadialGradient rg = QRadialGradient( size+10.0*hoffset, size+10.0*voffset, shadowSize );
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QColor c = shadowConfiguration.midColor();
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for( int i = 0; i<nPoints; i++ )
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{ c.setAlphaF( values[i] ); rg.setColorAt( x[i]/fixedSize, c ); }
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p.setBrush( rg );
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p.drawRect( shadow.rect() );
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}
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{
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int nPoints = 5;
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qreal values[5] = { 1, 0.32, 0.22, 0.03, 0 };
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qreal x[5] = { 0, 4.5, 5.0, 5.5, 6.5 };
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QRadialGradient rg = QRadialGradient( size+hoffset, size+voffset, shadowSize );
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QColor c = shadowConfiguration.innerColor();
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for( int i = 0; i<nPoints; i++ )
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{ c.setAlphaF( values[i] ); rg.setColorAt( x[i]/fixedSize, c ); }
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renderGradient( p, shadow.rect(), rg, noBorder );
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}
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}
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// draw the corner of the window - actually all 4 corners as one circle
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// this is all fixedSize. Does not scale with shadow size
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QLinearGradient lg = QLinearGradient(0.0, size-4.5, 0.0, size+4.5);
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if( key.frameBorder < Key::BorderAny )
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{
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lg.setColorAt(0.52, oxygenHelper()->backgroundTopColor(color));
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lg.setColorAt(1.0, oxygenHelper()->backgroundBottomColor(color) );
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} else {
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QColor light = oxygenHelper()->calcLightColor( oxygenHelper()->backgroundTopColor(color) );
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QColor dark = oxygenHelper()->calcDarkColor( oxygenHelper()->backgroundBottomColor(color));
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lg.setColorAt(0.52, light);
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lg.setColorAt(1.0, dark);
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}
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// draw ellipse.
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// note: special tricks are needed to cope with some rounding issues when size is not an integer.
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p.setBrush( lg );
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int sizeInt( size );
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p.drawEllipse( QRectF( sizeInt-4, sizeInt-4, 8+2*(size-sizeInt), 8+2*(size-sizeInt) ) );
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p.end();
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return shadow;
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}
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//_______________________________________________________
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void OxygenShadowCache::renderGradient( QPainter& p, const QRectF& rect, const QRadialGradient& rg, bool noBorders ) const
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{
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if( !noBorders )
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{
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p.setBrush( rg );
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p.drawRect( rect );
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return;
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}
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qreal size( rect.width()/2.0 );
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qreal hoffset( rg.center().x() - size );
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qreal voffset( rg.center().y() - size );
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// load gradient stops
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QGradientStops stops( rg.stops() );
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qreal radius( rg.radius() );
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// draw ellipse for the upper rect
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{
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QRectF rect( hoffset, voffset, 2*size-hoffset, size );
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p.setBrush( rg );
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p.drawRect( rect );
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}
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// draw square gradients for the lower rect
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{
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// vertical lines
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QRectF rect( hoffset, size+voffset, 2*size-hoffset, 4 );
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QLinearGradient lg( hoffset, 0.0, 2*size+hoffset, 0.0 );
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for( int i = 0; i<stops.size(); i++ )
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{
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QColor c( stops[i].second );
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qreal xx( stops[i].first*radius );
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lg.setColorAt( (size-xx)/(2.0*size), c );
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lg.setColorAt( (size+xx)/(2.0*size), c );
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}
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p.setBrush( lg );
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p.drawRect( rect );
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}
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{
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// horizontal line
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QRectF rect( size-4+hoffset, size+voffset, 8, size );
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QLinearGradient lg = QLinearGradient( 0, voffset, 0, 2*size+voffset );
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for( int i = 0; i<stops.size(); i++ )
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{
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QColor c( stops[i].second );
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qreal xx( stops[i].first*radius );
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lg.setColorAt( (size+xx)/(2.0*size), c );
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}
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p.setBrush( lg );
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p.drawRect( rect );
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}
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{
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// bottom-left corner
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QRectF rect( hoffset, size+4+voffset, size-4, size );
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QRadialGradient rg = QRadialGradient( size+hoffset-4, size+4+voffset, radius );
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for( int i = 0; i<stops.size(); i++ )
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{
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QColor c( stops[i].second );
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qreal xx( stops[i].first -4.0/rg.radius() );
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if( xx<0 && i < stops.size()-1 )
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{
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qreal x1( stops[i+1].first -4.0/rg.radius() );
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c = KColorUtils::mix( c, stops[i+1].second, -xx/(x1-xx) );
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xx = 0;
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}
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rg.setColorAt( xx, c );
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}
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p.setBrush( rg );
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p.drawRect( rect );
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}
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{
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// bottom-right corner
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QRectF rect( size+4+hoffset, size+4+voffset, size-4, size );
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QRadialGradient rg = QRadialGradient( size+hoffset+4, size+4+voffset, radius );
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for( int i = 0; i<stops.size(); i++ )
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{
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QColor c( stops[i].second );
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qreal xx( stops[i].first -4.0/rg.radius() );
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if( xx<0 && i < stops.size()-1 )
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{
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qreal x1( stops[i+1].first -4.0/rg.radius() );
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c = KColorUtils::mix( c, stops[i+1].second, -xx/(x1-xx) );
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xx = 0;
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}
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rg.setColorAt( xx, c );
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}
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p.setBrush( rg );
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p.drawRect( rect );
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}
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}
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}
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