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/********************************************************************
KWin - the KDE window manager
This file is part of the KDE project .
Copyright ( C ) 2016 Martin Gräßlin < mgraesslin @ kde . org >
This program is free software ; you can redistribute it and / or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation ; either version 2 of the License , or
( at your option ) any later version .
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 General Public License for more details .
You should have received a copy of the GNU General Public License
along with this program . If not , see < http : //www.gnu.org/licenses/>.
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
# include "colorpicker.h"
# include <kwinglutils.h>
# include <kwinglutils_funcs.h>
# include <QDBusConnection>
# include <KLocalizedString>
# include <QDBusMetaType>
Q_DECLARE_METATYPE ( QColor )
QDBusArgument & operator < < ( QDBusArgument & argument , const QColor & color )
{
argument . beginStructure ( ) ;
argument < < color . rgba ( ) ;
argument . endStructure ( ) ;
return argument ;
}
const QDBusArgument & operator > > ( const QDBusArgument & argument , QColor & color )
{
argument . beginStructure ( ) ;
QRgb rgba ;
argument > > rgba ;
argument . endStructure ( ) ;
color = QColor : : fromRgba ( rgba ) ;
return argument ;
}
namespace KWin
{
bool ColorPickerEffect : : supported ( )
{
return effects - > isOpenGLCompositing ( ) ;
}
ColorPickerEffect : : ColorPickerEffect ( )
: m_scheduledPosition ( QPoint ( - 1 , - 1 ) )
{
qDBusRegisterMetaType < QColor > ( ) ;
QDBusConnection : : sessionBus ( ) . registerObject ( QStringLiteral ( " /ColorPicker " ) , this , QDBusConnection : : ExportScriptableContents ) ;
}
ColorPickerEffect : : ~ ColorPickerEffect ( ) = default ;
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void ColorPickerEffect : : paintScreen ( int mask , const QRegion & region , ScreenPaintData & data )
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{
m_cachedOutputGeometry = data . outputGeometry ( ) ;
effects - > paintScreen ( mask , region , data ) ;
}
void ColorPickerEffect : : postPaintScreen ( )
{
effects - > postPaintScreen ( ) ;
if ( m_scheduledPosition ! = QPoint ( - 1 , - 1 ) & & ( m_cachedOutputGeometry . isEmpty ( ) | | m_cachedOutputGeometry . contains ( m_scheduledPosition ) ) ) {
uint8_t data [ 3 ] ;
const QRect geo = GLRenderTarget : : virtualScreenGeometry ( ) ;
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const QPoint screenPosition ( m_scheduledPosition . x ( ) - geo . x ( ) , m_scheduledPosition . y ( ) - geo . y ( ) ) ;
const QPoint texturePosition ( screenPosition . x ( ) * GLRenderTarget : : virtualScreenScale ( ) , ( geo . height ( ) - screenPosition . y ( ) ) * GLRenderTarget : : virtualScreenScale ( ) ) ;
glReadnPixels ( texturePosition . x ( ) , texturePosition . y ( ) , 1 , 1 , GL_RGB , GL_UNSIGNED_BYTE , 3 , data ) ;
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QDBusConnection : : sessionBus ( ) . send ( m_replyMessage . createReply ( QColor ( data [ 0 ] , data [ 1 ] , data [ 2 ] ) ) ) ;
m_picking = false ;
m_scheduledPosition = QPoint ( - 1 , - 1 ) ;
}
}
QColor ColorPickerEffect : : pick ( )
{
if ( ! calledFromDBus ( ) ) {
return QColor ( ) ;
}
if ( m_picking ) {
sendErrorReply ( QDBusError : : Failed , " Color picking is already in progress " ) ;
return QColor ( ) ;
}
m_picking = true ;
m_replyMessage = message ( ) ;
setDelayedReply ( true ) ;
showInfoMessage ( ) ;
effects - > startInteractivePositionSelection (
[ this ] ( const QPoint & p ) {
hideInfoMessage ( ) ;
if ( p = = QPoint ( - 1 , - 1 ) ) {
// error condition
QDBusConnection : : sessionBus ( ) . send ( m_replyMessage . createErrorReply ( QStringLiteral ( " org.kde.kwin.ColorPicker.Error.Cancelled " ) , " Color picking got cancelled " ) ) ;
m_picking = false ;
} else {
m_scheduledPosition = p ;
effects - > addRepaintFull ( ) ;
}
}
) ;
return QColor ( ) ;
}
void ColorPickerEffect : : showInfoMessage ( )
{
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effects - > showOnScreenMessage ( i18n ( " Select a position for color picking with left click or enter. \n Escape or right click to cancel. " ) , QStringLiteral ( " color-picker " ) ) ;
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}
void ColorPickerEffect : : hideInfoMessage ( )
{
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effects - > hideOnScreenMessage ( ) ;
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}
bool ColorPickerEffect : : isActive ( ) const
{
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return m_picking & & ( ( m_scheduledPosition ! = QPoint ( - 1 , - 1 ) ) ) & & ! effects - > isScreenLocked ( ) ;
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}
} // namespace