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kwin/clients/oxygen/oxygenshadowcache.cpp
Hugo Pereira Da Costa ffdadc4844 Fixed corner color for shaded windows 
svn path=/trunk/KDE/kdebase/workspace/; revision=1054385
2009-11-25 23:16:56 +00:00

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//////////////////////////////////////////////////////////////////////////////
// oxygenshadowcache.cpp
// 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.
//////////////////////////////////////////////////////////////////////////////
#include "oxygenshadowcache.h"
#include "oxygenclient.h"
#include "oxygen.h"
#include "lib/helper.h"
#include <cassert>
#include <KColorUtils>
#include <QtGui/QPainter>
namespace Oxygen
{
//_______________________________________________________
OxygenShadowCache::OxygenShadowCache( OxygenHelper& helper, int maxIndex ):
helper_( helper ),
maxIndex_( maxIndex ),
activeShadowConfiguration_( OxygenShadowConfiguration( QPalette::Active ) ),
inactiveShadowConfiguration_( OxygenShadowConfiguration( QPalette::Inactive ) )
{
shadowCache_.setMaxCost( 1<<6 );
animatedShadowCache_.setMaxCost( maxIndex_<<6 );
}
//_______________________________________________________
bool OxygenShadowCache::shadowConfigurationChanged( const OxygenShadowConfiguration& other ) const
{
const OxygenShadowConfiguration& local = (other.colorGroup() == QPalette::Active ) ? activeShadowConfiguration_:inactiveShadowConfiguration_;
return !(local == other);
}
//_______________________________________________________
void OxygenShadowCache::setShadowConfiguration( const OxygenShadowConfiguration& other )
{
OxygenShadowConfiguration& local = (other.colorGroup() == QPalette::Active ) ? activeShadowConfiguration_:inactiveShadowConfiguration_;
local = other;
}
//_______________________________________________________
TileSet* OxygenShadowCache::tileSet( const OxygenClient* client )
{
// construct key
Key key( client );
// check if tileset already in cache
int hash( key.hash() );
if( shadowCache_.contains(hash) ) return shadowCache_.object(hash);
// create tileset otherwise
qreal size( shadowSize() );
TileSet* tileSet = new TileSet( shadowPixmap( client, key.active ), size, size, 1, 1);
shadowCache_.insert( hash, tileSet );
return tileSet;
}
//_______________________________________________________
TileSet* OxygenShadowCache::tileSet( const OxygenClient* client, int index )
{
assert( index <= maxIndex_ );
// construct key
Key key( client );
key.index = index;
// check if tileset already in cache
int hash( key.hash() );
if( animatedShadowCache_.contains(hash) ) return animatedShadowCache_.object(hash);
// create shadow and tileset otherwise
qreal size( shadowSize() );
qreal opacity( qreal(index)/qreal(maxIndex_) );
QPixmap shadow( size*2, size*2 );
shadow.fill( Qt::transparent );
QPainter p( &shadow );
p.setRenderHint( QPainter::Antialiasing );
QPixmap inactiveShadow( shadowPixmap( client, false ) );
{
QPainter pp( &inactiveShadow );
pp.setRenderHint( QPainter::Antialiasing );
pp.setCompositionMode(QPainter::CompositionMode_DestinationIn);
pp.fillRect( inactiveShadow.rect(), QColor( 0, 0, 0, 255*(1.0-opacity ) ) );
}
QPixmap activeShadow( shadowPixmap( client, true ) );
{
QPainter pp( &activeShadow );
pp.setRenderHint( QPainter::Antialiasing );
pp.setCompositionMode(QPainter::CompositionMode_DestinationIn);
pp.fillRect( activeShadow.rect(), QColor( 0, 0, 0, 255*( opacity ) ) );
}
p.drawPixmap( QPointF(0,0), inactiveShadow );
p.drawPixmap( QPointF(0,0), activeShadow );
p.end();
TileSet* tileSet = new TileSet(shadow, size, size, 1, 1);
animatedShadowCache_.insert( hash, tileSet );
return tileSet;
}
//_________________________________________________________________
QPixmap OxygenShadowCache::shadowPixmap(const OxygenClient* client, bool active ) const
{
// get window color
Key key( client );
QPalette palette( client->backgroundPalette( client->widget(), client->widget()->palette() ) );
QColor color( palette.color( client->widget()->backgroundRole() ) );
return simpleShadowPixmap( color, key, active );
}
//_______________________________________________________
QPixmap OxygenShadowCache::simpleShadowPixmap( const QColor& color, const Key& key, bool active ) const
{
// local reference to relevant shadow configuration
const OxygenShadowConfiguration& shadowConfiguration(
active && key.useOxygenShadows ?
activeShadowConfiguration_:inactiveShadowConfiguration_ );
static const qreal fixedSize = 25.5;
qreal size( shadowSize() );
qreal shadowSize( shadowConfiguration.shadowSize() );
QPixmap shadow = QPixmap( size*2, size*2 );
shadow.fill( Qt::transparent );
QPainter p( &shadow );
p.setRenderHint( QPainter::Antialiasing );
p.setPen( Qt::NoPen );
// offsets are scaled with the shadow size
// so that the ratio Top-shadow/Bottom-shadow is kept constant
// when shadow size is changed
qreal hoffset = shadowConfiguration.horizontalOffset()*shadowSize/fixedSize;
qreal voffset = shadowConfiguration.verticalOffset()*shadowSize/fixedSize;
// some gradients rendering are different at bottom corners if client has no border
bool hasBorder( key.hasBorder || key.isShade );
if( shadowSize )
{
if( active && key.useOxygenShadows )
{
{
// inner (shark) gradient
int nPoints = 7;
qreal x[7] = {0, 0.05, 0.1, 0.15, 0.2, 0.3, 0.4 };
int values[7] = {203, 200, 175, 105, 45, 2, 0 };
QRadialGradient rg = QRadialGradient( size+12.0*hoffset, size+12.0*voffset, shadowSize );
QColor c = shadowConfiguration.innerColor();
for( int i = 0; i<nPoints; i++ )
{ c.setAlpha( values[i] ); rg.setColorAt( x[i], c ); }
p.setBrush( rg );
renderGradient( p, shadow.rect(), rg, hasBorder );
}
if( true ) {
// outer (spread) gradient
int nPoints = 7;
qreal x[7] = {0, 0.15, 0.3, 0.45, 0.65, 0.75, 1 };
int values[7] = {120, 95, 50, 20, 10, 5, 0 };
QRadialGradient rg = QRadialGradient( size+12.0*hoffset, size+12.0*voffset, shadowSize );
QColor c = shadowConfiguration.outerColor();
for( int i = 0; i<nPoints; i++ )
{ c.setAlpha( values[i] ); rg.setColorAt( x[i], c ); }
p.setBrush( rg );
p.drawRect( shadow.rect() );
}
} else {
{
// inner (sharp gradient)
int nPoints = 5;
qreal values[5] = { 1, 0.32, 0.22, 0.03, 0 };
qreal x[5] = { 0, 4.5, 5.0, 5.5, 6.5 };
QRadialGradient rg = QRadialGradient( size+hoffset, size+voffset, shadowSize );
QColor c = shadowConfiguration.innerColor();
for( int i = 0; i<nPoints; i++ )
{ c.setAlphaF( values[i] ); rg.setColorAt( x[i]/fixedSize, c ); }
renderGradient( p, shadow.rect(), rg, hasBorder );
}
{
// mid gradient
int nPoints = 7;
qreal values[7] = {0.55, 0.25, 0.20, 0.1, 0.06, 0.015, 0 };
qreal x[7] = {0, 4.5, 5.5, 7.5, 8.5, 11.5, 14.5 };
QRadialGradient rg = QRadialGradient( size+10.0*hoffset, size+10.0*voffset, shadowSize );
QColor c = shadowConfiguration.midColor();
for( int i = 0; i<nPoints; i++ )
{ c.setAlphaF( values[i] ); rg.setColorAt( x[i]/fixedSize, c ); }
p.setBrush( rg );
p.drawRect( shadow.rect() );
}
{
// outer (spread) gradient
int nPoints = 9;
qreal values[9] = { 0.17, 0.12, 0.11, 0.075, 0.06, 0.035, 0.025, 0.01, 0 };
qreal x[9] = {0, 4.5, 6.6, 8.5, 11.5, 14.5, 17.5, 21.5, 25.5 };
QRadialGradient rg = QRadialGradient( size+20.0*hoffset, size+20.0*voffset, shadowSize );
QColor c = shadowConfiguration.outerColor();
for( int i = 0; i<nPoints; i++ )
{ c.setAlphaF( values[i] ); rg.setColorAt( x[i]/fixedSize, c ); }
p.setBrush( rg );
p.drawRect( shadow.rect() );
}
}
}
// draw the corner of the window - actually all 4 corners as one circle
// this is all fixedSize. Does not scale with shadow size
QLinearGradient lg = QLinearGradient(0.0, size-4.5, 0.0, size+4.5);
lg.setColorAt(0.0, helper().calcLightColor( helper().backgroundTopColor(color) ));
lg.setColorAt(0.51, helper().backgroundBottomColor(color) );
lg.setColorAt(1.0, helper().backgroundBottomColor(color) );
// draw ellipse.
p.setBrush( lg );
p.drawEllipse( QRectF( size-4, size-4, 8, 8 ) );
p.end();
return shadow;
}
//_______________________________________________________
void OxygenShadowCache::renderGradient( QPainter& p, const QRectF& rect, const QRadialGradient& rg, bool hasBorder ) const
{
if( hasBorder )
{
p.setBrush( rg );
p.drawRect( rect );
return;
}
qreal size( rect.width()/2.0 );
qreal hoffset( rg.center().x() - size );
qreal voffset( rg.center().y() - size );
// load gradient stops
QGradientStops stops( rg.stops() );
qreal radius( rg.radius() );
// draw ellipse for the upper rect
{
QRectF rect( hoffset, voffset, 2*size-hoffset, size );
p.setBrush( rg );
p.drawRect( rect );
}
// draw square gradients for the lower rect
{
// vertical lines
QRectF rect( hoffset, size+voffset, 2*size-hoffset, 4 );
QLinearGradient lg( hoffset, 0.0, 2*size+hoffset, 0.0 );
for( int i = 0; i<stops.size(); i++ )
{
QColor c( stops[i].second );
qreal xx( stops[i].first*radius );
lg.setColorAt( (size-xx)/(2.0*size), c );
lg.setColorAt( (size+xx)/(2.0*size), c );
}
p.setBrush( lg );
p.drawRect( rect );
}
{
// horizontal line
QRectF rect( size-4+hoffset, size+voffset, 8, size );
QLinearGradient lg = QLinearGradient( 0, voffset, 0, 2*size+voffset );
for( int i = 0; i<stops.size(); i++ )
{
QColor c( stops[i].second );
qreal xx( stops[i].first*radius );
lg.setColorAt( (size+xx)/(2.0*size), c );
}
p.setBrush( lg );
p.drawRect( rect );
}
{
// bottom-left corner
QRectF rect( hoffset, size+4+voffset, size-4, size );
QRadialGradient rg = QRadialGradient( size+hoffset-4, size+4+voffset, radius );
for( int i = 0; i<stops.size(); i++ )
{
QColor c( stops[i].second );
qreal xx( stops[i].first -4.0/rg.radius() );
if( xx<0 && i < stops.size()-1 )
{
qreal x1( stops[i+1].first -4.0/rg.radius() );
c = KColorUtils::mix( c, stops[i+1].second, -xx/(x1-xx) );
xx = 0;
}
rg.setColorAt( xx, c );
}
p.setBrush( rg );
p.drawRect( rect );
}
{
// bottom-right corner
QRectF rect( size+4+hoffset, size+4+voffset, size-4, size );
QRadialGradient rg = QRadialGradient( size+hoffset+4, size+4+voffset, radius );
for( int i = 0; i<stops.size(); i++ )
{
QColor c( stops[i].second );
qreal xx( stops[i].first -4.0/rg.radius() );
if( xx<0 && i < stops.size()-1 )
{
qreal x1( stops[i+1].first -4.0/rg.radius() );
c = KColorUtils::mix( c, stops[i+1].second, -xx/(x1-xx) );
xx = 0;
}
rg.setColorAt( xx, c );
}
p.setBrush( rg );
p.drawRect( rect );
}
}
OxygenShadowCache::Key::Key( const OxygenClient* client):
index(0)
{
active = client->isActive() || client->isForcedActive();
useOxygenShadows = client->configuration().useOxygenShadows();
isShade = client->isShade();
hasTitleOutline = client->configuration().drawTitleOutline();
hasBorder = ( client->configuration().frameBorder() > OxygenConfiguration::BorderNone );
}
}
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