diff options
Diffstat (limited to 'karbon/core/vgradient.cc')
| -rw-r--r-- | karbon/core/vgradient.cc | 370 |
1 files changed, 370 insertions, 0 deletions
diff --git a/karbon/core/vgradient.cc b/karbon/core/vgradient.cc new file mode 100644 index 00000000..cd3b55b6 --- /dev/null +++ b/karbon/core/vgradient.cc @@ -0,0 +1,370 @@ +/* This file is part of the KDE project + Copyright (C) 2002 - 2005, The Karbon Developers + + This library is free software; you can redistribute it and/or + modify it under the terms of the GNU Library General Public + License as published by the Free Software Foundation; either + version 2 of the License, or (at your option) any later version. + + This library 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 + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public License + along with this library; see the file COPYING.LIB. If not, write to + the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, + * Boston, MA 02110-1301, USA. +*/ + +#include <qdom.h> +#include <qbuffer.h> + +#include "vdocument.h" +#include "vglobal.h" +#include "vgradient.h" + +#include <KoGenStyles.h> +#include <KoXmlWriter.h> +#include <KoXmlNS.h> + +int VGradient::VColorStopList::compareItems( QPtrCollection::Item item1, QPtrCollection::Item item2 ) +{ + float r1 = ( (VColorStop*)item1 )->rampPoint; + float r2 = ( (VColorStop*)item2 )->rampPoint; + + return ( r1 == r2 ? 0 : r1 < r2 ? -1 : 1 ); +} // VGradient::VColorStopList::compareItems + +VGradient::VGradient( VGradientType type ) + : m_type( type ) +{ + m_colorStops.setAutoDelete( true ); + + // set up dummy gradient + VColor color; + + color.set( 1.0, 0.0, 0.0 ); + addStop( color, 0.0, 0.5 ); + + color.set( 1.0, 1.0, 0.0 ); + addStop( color, 1.0, 0.5 ); + + setOrigin( KoPoint( 0, 0 ) ); + setVector( KoPoint( 0, 50 ) ); + setRepeatMethod( VGradient::reflect ); +} + +VGradient::VGradient( const VGradient& gradient ) +{ + m_colorStops.setAutoDelete( true ); + + m_origin = gradient.m_origin; + m_focalPoint = gradient.m_focalPoint; + m_vector = gradient.m_vector; + m_type = gradient.m_type; + m_repeatMethod = gradient.m_repeatMethod; + + m_colorStops.clear(); + QPtrVector<VColorStop> cs = gradient.colorStops(); + for( uint i = 0; i < cs.count(); i++ ) + m_colorStops.append( new VColorStop( *cs[i] ) ); + m_colorStops.sort(); +} // VGradient::VGradient + +VGradient& VGradient::operator=( const VGradient& gradient ) +{ + m_colorStops.setAutoDelete( true ); + + if ( this == &gradient ) + return *this; + + m_origin = gradient.m_origin; + m_focalPoint = gradient.m_focalPoint; + m_vector = gradient.m_vector; + m_type = gradient.m_type; + m_repeatMethod = gradient.m_repeatMethod; + + m_colorStops.clear(); + QPtrVector<VColorStop> cs = gradient.colorStops(); + for( uint i = 0; i < cs.count(); i++ ) + m_colorStops.append( new VColorStop( *cs[i] ) ); + m_colorStops.sort(); + + return *this; +} // VGradient::operator= + +const QPtrVector<VColorStop> VGradient::colorStops() const +{ + QPtrVector<VColorStop> v; + m_colorStops.toVector( &v ); + v.setAutoDelete( false ); + return v; +} // VGradient::colorStops() + +void +VGradient::clearStops() +{ + m_colorStops.clear(); +} + +void +VGradient::addStop( const VColorStop& colorStop ) +{ + m_colorStops.inSort( new VColorStop( colorStop ) ); +} // VGradient::addStop + +void +VGradient::addStop( const VColor &color, float rampPoint, float midPoint ) +{ + // Clamping between 0.0 and 1.0 + rampPoint = kMax( 0.0f, rampPoint ); + rampPoint = kMin( 1.0f, rampPoint ); + // Clamping between 0.0 and 1.0 + midPoint = kMax( 0.0f, midPoint ); + midPoint = kMin( 1.0f, midPoint ); + + // Work around stops with the same position + VColorStop *v; + for(v = m_colorStops.first(); v; v = m_colorStops.next()) + { + if(rampPoint == v->rampPoint) + rampPoint += 0.001f; + } + m_colorStops.inSort( new VColorStop( rampPoint, midPoint, color ) ); +} + +void VGradient::removeStop( const VColorStop& colorstop ) +{ + m_colorStops.remove( &colorstop ); +} // VGradient::removeStop + +void +VGradient::save( QDomElement& element ) const +{ + QDomElement me = element.ownerDocument().createElement( "GRADIENT" ); + + me.setAttribute( "originX", m_origin.x() ); + me.setAttribute( "originY", m_origin.y() ); + me.setAttribute( "focalX", m_focalPoint.x() ); + me.setAttribute( "focalY", m_focalPoint.y() ); + me.setAttribute( "vectorX", m_vector.x() ); + me.setAttribute( "vectorY", m_vector.y() ); + me.setAttribute( "type", m_type ); + me.setAttribute( "repeatMethod", m_repeatMethod ); + + // save stops + VColorStop* colorstop; + QPtrList<VColorStop>& colorStops = const_cast<VColorStopList&>( m_colorStops ); + for( colorstop = colorStops.first(); colorstop; colorstop = colorStops.next() ) + { + QDomElement stop = element.ownerDocument().createElement( "COLORSTOP" ); + colorstop->color.save( stop ); + stop.setAttribute( "ramppoint", colorstop->rampPoint ); + stop.setAttribute( "midpoint", colorstop->midPoint ); + me.appendChild( stop ); + } + + element.appendChild( me ); +} + +QString +VGradient::saveOasis( KoGenStyles &mainStyles ) const +{ + bool radial = m_type == VGradient::radial; + KoGenStyle gradientStyle( radial ? VDocument::STYLE_RADIAL_GRADIENT : VDocument::STYLE_LINEAR_GRADIENT /*no family name*/); + if( radial ) + { + gradientStyle.addAttribute( "draw:style", "radial" ); + gradientStyle.addAttributePt( "svg:cx", m_origin.x() ); + gradientStyle.addAttributePt( "svg:cy", m_origin.y() ); + double dx = m_vector.x() - m_origin.x(); + double dy = m_vector.y() - m_origin.y(); + gradientStyle.addAttributePt( "svg:r", sqrt( dx * dx + dy * dy ) ); + gradientStyle.addAttributePt( "svg:fx", m_focalPoint.x() ); + gradientStyle.addAttributePt( "svg:fy", m_focalPoint.y() ); + } + else + { + gradientStyle.addAttribute( "draw:style", "linear" ); + gradientStyle.addAttributePt( "svg:x1", m_origin.x() ); + gradientStyle.addAttributePt( "svg:y1", m_origin.y() ); + gradientStyle.addAttributePt( "svg:x2", m_vector.x() ); + gradientStyle.addAttributePt( "svg:y2", m_vector.y() ); + } + if( m_repeatMethod == VGradient::repeat ) + gradientStyle.addAttribute( "svg:spreadMethod", "repeat" ); + else if( m_repeatMethod == VGradient::reflect ) + gradientStyle.addAttribute( "svg:spreadMethod", "reflect" ); + else + gradientStyle.addAttribute( "svg:spreadMethod", "pad" ); + QBuffer buffer; + buffer.open( IO_WriteOnly ); + KoXmlWriter elementWriter( &buffer ); // TODO pass indentation level + + // save stops + VColorStop* colorstop; + QPtrList<VColorStop>& colorStops = const_cast<VColorStopList&>( m_colorStops ); + for( colorstop = colorStops.first(); colorstop; colorstop = colorStops.next() ) + { + elementWriter.startElement( "svg:stop" ); + elementWriter.addAttribute( "svg:offset", QString( "%1" ).arg( colorstop->rampPoint ) ); + elementWriter.addAttribute( "svg:color", QColor( colorstop->color ).name() ); + if( colorstop->color.opacity() < 1 ) + elementWriter.addAttribute( "svg:stop-opacity", QString( "%1" ).arg( colorstop->color.opacity() ) ); + elementWriter.endElement(); + } + + QString elementContents = QString::fromUtf8( buffer.buffer(), buffer.buffer().size() ); + gradientStyle.addChildElement( "svg:stop", elementContents ); + return mainStyles.lookup( gradientStyle, "gradient" ); +} + +void +VGradient::loadOasis( const QDomElement &object, KoStyleStack &/*stack*/, VObject* parent ) +{ + kdDebug(38000) << "namespaceURI: " << object.namespaceURI() << endl; + kdDebug(38000) << "localName: " << object.localName() << endl; + + KoRect bb; + + if( parent ) + bb = parent->boundingBox(); + + if( object.namespaceURI() == KoXmlNS::draw && object.localName() == "gradient" ) + { + m_repeatMethod = VGradient::reflect; + QString strType = object.attributeNS( KoXmlNS::draw, "style", QString::null ); + if( strType == "radial" ) + { + m_type = VGradient::radial; + // TODO : find out whether Oasis works with boundingBox only? + double cx = KoUnit::parseValue( object.attributeNS( KoXmlNS::draw, "cx", QString::null ).remove("%") ); + m_origin.setX( bb.bottomLeft().x() + bb.width() * 0.01 * cx ); + double cy = KoUnit::parseValue( object.attributeNS( KoXmlNS::draw, "cy", QString::null ).remove("%") ); + m_origin.setY( bb.bottomLeft().y() - bb.height() * 0.01 * cy ); + m_focalPoint = m_origin; + m_vector = bb.topRight(); + } + else if( strType == "linear" ) + { + m_type = VGradient::linear; + double angle = 90 + object.attributeNS( KoXmlNS::draw, "angle", "0" ).toDouble(); + double radius = 0.5 * sqrt( bb.width()*bb.width() + bb.height()*bb.height() ); + double sx = cos( angle * VGlobal::pi / 180 ) * radius; + double sy = sin( angle * VGlobal::pi / 180 ) * radius; + m_origin.setX( bb.center().x() + sx ); + m_origin.setY( bb.center().y() + sy ); + m_vector.setX( bb.center().x() - sx ); + m_vector.setY( bb.center().y() - sy ); + m_focalPoint = m_origin; + } + else return; + + VColor startColor( QColor( object.attributeNS( KoXmlNS::draw, "start-color", QString::null ) ) ); + VColor endColor( QColor( object.attributeNS( KoXmlNS::draw, "end-color", QString::null ) ) ); + + double startOpacity = 0.01 * object.attributeNS( KoXmlNS::draw, "start-intensity", "100" ).remove("%").toDouble(); + double endOpacity = 0.01 * object.attributeNS( KoXmlNS::draw, "end-intensity", "100" ).remove("%").toDouble(); + + startColor.setOpacity( startOpacity ); + endColor.setOpacity( endOpacity ); + m_colorStops.clear(); + addStop( startColor, 0.0, 0.5 ); + addStop( endColor, 1.0, 0.0 ); + m_colorStops.sort(); + + } + else if( object.namespaceURI() == KoXmlNS::svg ) + { + if( object.localName() == "linearGradient" ) + { + m_type = VGradient::linear; + m_origin.setX( KoUnit::parseValue( object.attributeNS( KoXmlNS::svg, "x1", QString::null ) ) ); + m_origin.setY( KoUnit::parseValue( object.attributeNS( KoXmlNS::svg, "y1", QString::null ) ) ); + m_vector.setX( KoUnit::parseValue( object.attributeNS( KoXmlNS::svg, "x2", QString::null ) ) ); + m_vector.setY( KoUnit::parseValue( object.attributeNS( KoXmlNS::svg, "y2", QString::null ) ) ); + m_focalPoint = m_origin; + } + else if( object.localName() == "radialGradient" ) + { + m_type = VGradient::radial; + m_origin.setX( KoUnit::parseValue( object.attributeNS( KoXmlNS::svg, "cx", QString::null ) ) ); + m_origin.setY( KoUnit::parseValue( object.attributeNS( KoXmlNS::svg, "cy", QString::null ) ) ); + double r = KoUnit::parseValue( object.attributeNS( KoXmlNS::svg, "r", QString::null ) ); + m_vector.setX( m_origin.x() + r ); + m_vector.setY( m_origin.y() ); + m_focalPoint.setX( KoUnit::parseValue( object.attributeNS( KoXmlNS::svg, "fx", QString::null ) ) ); + m_focalPoint.setY( KoUnit::parseValue( object.attributeNS( KoXmlNS::svg, "fy", QString::null ) ) ); + } + + QString strSpread( object.attributeNS( KoXmlNS::svg, "spreadMethod", "pad" ) ); + if( strSpread == "repeat" ) + m_repeatMethod = VGradient::repeat; + else if( strSpread == "reflect" ) + m_repeatMethod = VGradient::reflect; + else + m_repeatMethod = VGradient::none; + + m_colorStops.clear(); + + // load stops + QDomNodeList list = object.childNodes(); + for( uint i = 0; i < list.count(); ++i ) + { + if( list.item( i ).isElement() ) + { + QDomElement colorstop = list.item( i ).toElement(); + + if( colorstop.namespaceURI() == KoXmlNS::svg && colorstop.localName() == "stop" ) + { + VColor color( QColor( colorstop.attributeNS( KoXmlNS::svg, "color", QString::null ) ) ); + color.setOpacity( colorstop.attributeNS( KoXmlNS::svg, "stop-opacity", "1.0" ).toDouble() ); + addStop( color, colorstop.attributeNS( KoXmlNS::svg, "offset", "0.0" ).toDouble(), 0.5 ); + } + } + } + m_colorStops.sort(); + } +} + +void +VGradient::load( const QDomElement& element ) +{ + m_origin.setX( element.attribute( "originX", "0.0" ).toDouble() ); + m_origin.setY( element.attribute( "originY", "0.0" ).toDouble() ); + m_focalPoint.setX( element.attribute( "focalX", "0.0" ).toDouble() ); + m_focalPoint.setY( element.attribute( "focalY", "0.0" ).toDouble() ); + m_vector.setX( element.attribute( "vectorX", "0.0" ).toDouble() ); + m_vector.setY( element.attribute( "vectorY", "0.0" ).toDouble() ); + m_type = (VGradientType)element.attribute( "type", 0 ).toInt(); + m_repeatMethod = (VGradientRepeatMethod)element.attribute( "repeatMethod", 0 ).toInt(); + + m_colorStops.clear(); + + // load stops + QDomNodeList list = element.childNodes(); + for( uint i = 0; i < list.count(); ++i ) + { + if( list.item( i ).isElement() ) + { + QDomElement colorstop = list.item( i ).toElement(); + + if( colorstop.tagName() == "COLORSTOP" ) + { + VColor color; + color.load( colorstop.firstChild().toElement() ); + addStop( color, colorstop.attribute( "ramppoint", "0.0" ).toDouble(), colorstop.attribute( "midpoint", "0.5" ).toDouble() ); + } + } + } + m_colorStops.sort(); +} + +void +VGradient::transform( const QWMatrix &m ) +{ + m_origin = m_origin.transform( m ); + m_focalPoint = m_focalPoint.transform( m ); + m_vector = m_vector.transform( m ); +} |