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543 lines
15 KiB
543 lines
15 KiB
15 years ago
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/*
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Copyright (C) 2001-2003 KSVG Team
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This file is part of the KDE project
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public
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License as published by the Free Software Foundation; either
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version 2 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public License
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along with this library; see the file COPYING.LIB. If not, write to
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the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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Boston, MA 02110-1301, USA.
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*/
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#include <cfloat>
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#include <kdebug.h>
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#include <qimage.h>
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#include "SVGMaskElement.h"
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#include "SVGRectImpl.h"
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#include "SVGDocumentImpl.h"
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#include "SVGSVGElementImpl.h"
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#include "SVGMaskElementImpl.h"
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#include "SVGAnimatedLengthImpl.h"
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#include "SVGAnimatedEnumerationImpl.h"
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#include "SVGUnitConverter.h"
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#include "SVGShapeImpl.h"
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#include "SVGMatrixImpl.h"
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#include "KSVGCanvas.h"
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#include "CanvasItems.h"
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#include "CanvasFactory.h"
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#include "KSVGHelper.h"
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#include <X11/Xos.h>
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using namespace KSVG;
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#include "SVGMaskElementImpl.lut.h"
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#include "ksvg_scriptinterpreter.h"
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#include "ksvg_ecma.h"
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SVGMaskElementImpl::SVGMaskElementImpl(DOM::ElementImpl *impl) : SVGElementImpl(impl), SVGTestsImpl(), SVGLangSpaceImpl(), SVGExternalResourcesRequiredImpl(), SVGStylableImpl(this), SVGBBoxTarget()
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{
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KSVG_EMPTY_FLAGS
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m_x = new SVGAnimatedLengthImpl(LENGTHMODE_WIDTH, this);
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m_x->ref();
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m_y = new SVGAnimatedLengthImpl(LENGTHMODE_HEIGHT, this);
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m_y->ref();
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m_width = new SVGAnimatedLengthImpl(LENGTHMODE_WIDTH, this);
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m_width->ref();
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m_height = new SVGAnimatedLengthImpl(LENGTHMODE_HEIGHT, this);
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m_height->ref();
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m_maskUnits = new SVGAnimatedEnumerationImpl();
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m_maskUnits->ref();
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m_maskContentUnits = new SVGAnimatedEnumerationImpl();
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m_maskContentUnits->ref();
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m_converter = new SVGUnitConverter();
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m_converter->add(m_x);
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m_converter->add(m_y);
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m_converter->add(m_width);
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m_converter->add(m_height);
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m_canvas = 0;
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m_maskCache.setMaxTotalCost(1024 * 1024);
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}
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SVGMaskElementImpl::~SVGMaskElementImpl()
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{
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if(m_x)
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m_x->deref();
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if(m_y)
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m_y->deref();
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if(m_width)
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m_width->deref();
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if(m_height)
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m_height->deref();
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if(m_maskUnits)
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m_maskContentUnits->deref();
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if(m_maskUnits)
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m_maskContentUnits->deref();
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delete m_converter;
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if(m_canvas)
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delete m_canvas;
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}
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SVGAnimatedEnumerationImpl *SVGMaskElementImpl::maskUnits() const
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{
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return m_maskUnits;
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}
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SVGAnimatedEnumerationImpl *SVGMaskElementImpl::maskContentUnits() const
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{
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return m_maskContentUnits;
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}
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SVGAnimatedLengthImpl *SVGMaskElementImpl::x() const
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{
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return m_x;
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}
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SVGAnimatedLengthImpl *SVGMaskElementImpl::y() const
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{
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return m_y;
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}
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SVGAnimatedLengthImpl *SVGMaskElementImpl::width() const
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{
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return m_width;
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}
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SVGAnimatedLengthImpl *SVGMaskElementImpl::height() const
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{
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return m_height;
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}
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/*
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@namespace KSVG
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@begin SVGMaskElementImpl::s_hashTable 7
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maskUnits SVGMaskElementImpl::MaskUnits DontDelete|ReadOnly
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maskContentUnits SVGMaskElementImpl::MaskContentUnits DontDelete|ReadOnly
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x SVGMaskElementImpl::X DontDelete|ReadOnly
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y SVGMaskElementImpl::Y DontDelete|ReadOnly
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width SVGMaskElementImpl::Width DontDelete|ReadOnly
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height SVGMaskElementImpl::Height DontDelete|ReadOnly
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@end
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*/
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Value SVGMaskElementImpl::getValueProperty(ExecState *exec, int token) const
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{
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KSVG_CHECK_ATTRIBUTE
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switch(token)
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{
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case MaskUnits:
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if(!attributeMode)
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return m_maskUnits->cache(exec);
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else
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return Number(m_maskUnits->baseVal());
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case MaskContentUnits:
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if(!attributeMode)
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return m_maskContentUnits->cache(exec);
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else
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return Number(m_maskContentUnits->baseVal());
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case X:
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if(!attributeMode)
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return m_x->cache(exec);
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else
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return Number(m_x->baseVal()->value());
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case Y:
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if(!attributeMode)
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return m_y->cache(exec);
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else
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return Number(m_y->baseVal()->value());
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case Width:
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if(!attributeMode)
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return m_width->cache(exec);
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else
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return Number(m_width->baseVal()->value());
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case Height:
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if(!attributeMode)
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return m_height->cache(exec);
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else
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return Number(m_height->baseVal()->value());
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default:
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kdWarning() << "Unhandled token in " << k_funcinfo << " : " << token << endl;
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return Undefined();
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}
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}
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void SVGMaskElementImpl::putValueProperty(ExecState *exec, int token, const Value &value, int attr)
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{
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// This class has just ReadOnly properties, only with the Internal flag set
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// it's allowed to modify those.
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if(!(attr & KJS::Internal))
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return;
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switch(token)
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{
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case MaskUnits:
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if(value.toString(exec).qstring() == "objectBoundingBox")
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m_maskUnits->setBaseVal(SVGMaskElement::SVG_UNIT_TYPE_OBJECTBOUNDINGBOX);
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else
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m_maskUnits->setBaseVal(SVGMaskElement::SVG_UNIT_TYPE_USERSPACEONUSE);
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break;
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case MaskContentUnits:
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if(value.toString(exec).qstring() == "objectBoundingBox")
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m_maskContentUnits->setBaseVal(SVGMaskElement::SVG_UNIT_TYPE_OBJECTBOUNDINGBOX);
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else
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m_maskContentUnits->setBaseVal(SVGMaskElement::SVG_UNIT_TYPE_USERSPACEONUSE);
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break;
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case X:
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converter()->modify(x(), value.toString(exec).qstring());
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break;
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case Y:
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converter()->modify(y(), value.toString(exec).qstring());
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break;
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case Width:
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converter()->modify(width(), value.toString(exec).qstring());
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break;
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case Height:
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converter()->modify(height(), value.toString(exec).qstring());
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break;
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default:
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kdWarning() << "Unhandled token in " << k_funcinfo << " : " << token << endl;
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}
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}
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SVGRectImpl *SVGMaskElementImpl::getBBox()
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{
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SVGRectImpl *ret = SVGSVGElementImpl::createSVGRect();
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ret->setX(m_x->baseVal()->value());
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ret->setY(m_y->baseVal()->value());
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ret->setWidth(m_width->baseVal()->value());
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ret->setHeight(m_height->baseVal()->value());
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return ret;
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}
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void SVGMaskElementImpl::setAttributes()
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{
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SVGElementImpl::setAttributes();
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// Spec: if attribute not specified, use objectBoundingBox
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if(KSVG_TOKEN_NOT_PARSED(MaskUnits))
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KSVG_SET_ALT_ATTRIBUTE(MaskUnits, "objectBoundingBox")
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// Spec: if attribute not specified, use userSpaceOnUse
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if(KSVG_TOKEN_NOT_PARSED(MaskContentUnits))
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KSVG_SET_ALT_ATTRIBUTE(MaskContentUnits, "userSpaceOnUse")
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// Spec: if attribute not specified, use "-10%"
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if(KSVG_TOKEN_NOT_PARSED(X))
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KSVG_SET_ALT_ATTRIBUTE(X, "-10%");
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// Spec: if attribute not specified, use "-10%"
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if(KSVG_TOKEN_NOT_PARSED(Y))
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KSVG_SET_ALT_ATTRIBUTE(Y, "-10%");
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// Spec: if attribute not specified, use "120%"
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if(KSVG_TOKEN_NOT_PARSED(Width))
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KSVG_SET_ALT_ATTRIBUTE(Width, "120%");
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// Spec: if attribute not specified, use "120%"
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if(KSVG_TOKEN_NOT_PARSED(Height))
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KSVG_SET_ALT_ATTRIBUTE(Height, "120%");
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}
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SVGMaskElementImpl::Mask SVGMaskElementImpl::createMask(SVGShapeImpl *referencingElement, int imageWidth, int imageHeight)
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{
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converter()->finalize(referencingElement, ownerSVGElement(), maskUnits()->baseVal());
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Q_UINT32 *imageBits = new Q_UINT32[imageWidth * imageHeight];
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if(m_canvas == 0)
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m_canvas = CanvasFactory::self()->loadCanvas(imageWidth, imageHeight);
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m_canvas->setup(reinterpret_cast<unsigned char *>(imageBits), imageWidth, imageHeight);
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m_canvas->setBackgroundColor(qRgba(0, 0, 0, 0));
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SVGMatrixImpl *baseMatrix = SVGSVGElementImpl::createSVGMatrix();
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// Set the scale to map the mask onto the image
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double xScale = static_cast<double>(imageWidth) / width()->baseVal()->value();
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double yScale = static_cast<double>(imageHeight) / height()->baseVal()->value();
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baseMatrix->scaleNonUniform(xScale, yScale);
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SVGRectImpl *bbox = referencingElement->getBBox();
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if(maskUnits()->baseVal() == SVGMaskElement::SVG_UNIT_TYPE_OBJECTBOUNDINGBOX)
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baseMatrix->translate(-(bbox->x() + x()->baseVal()->value()), -(bbox->y() + y()->baseVal()->value()));
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else
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baseMatrix->translate(-x()->baseVal()->value(), -y()->baseVal()->value());
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if(maskContentUnits()->baseVal() == SVGMaskElement::SVG_UNIT_TYPE_OBJECTBOUNDINGBOX)
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{
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baseMatrix->translate(bbox->x(), bbox->y());
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baseMatrix->scaleNonUniform(bbox->width(), bbox->height());
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}
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for(DOM::Node node = firstChild(); !node.isNull(); node = node.nextSibling())
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{
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SVGElementImpl *element = ownerDoc()->getElementFromHandle(node.handle());
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SVGShapeImpl *shape = dynamic_cast<SVGShapeImpl *>(element);
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SVGTestsImpl *tests = dynamic_cast<SVGTestsImpl *>(element);
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SVGStylableImpl *style = dynamic_cast<SVGStylableImpl *>(element);
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bool ok = tests ? tests->ok() : true;
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if(element && shape && style && ok && style->getVisible() && style->getDisplay())
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{
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SVGLocatableImpl *locatable = dynamic_cast<SVGLocatableImpl *>(element);
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if(locatable)
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locatable->updateCachedScreenCTM(baseMatrix);
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element->createItem(m_canvas);
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if(shape->item())
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{
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shape->item()->setReferenced(true);
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m_canvas->invalidate(shape->item(), true);
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}
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}
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}
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m_canvas->update(float(1));
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for(DOM::Node node = firstChild(); !node.isNull(); node = node.nextSibling())
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{
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SVGElementImpl *element = ownerDoc()->getElementFromHandle(node.handle());
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SVGShapeImpl *shape = dynamic_cast<SVGShapeImpl *>(element);
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SVGTestsImpl *tests = dynamic_cast<SVGTestsImpl *>(element);
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SVGStylableImpl *style = dynamic_cast<SVGStylableImpl *>(element);
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bool ok = tests ? tests->ok() : true;
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if(element && shape && style && ok && style->getVisible() && style->getDisplay())
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{
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if(shape)
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shape->removeItem(m_canvas);
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}
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}
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{
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// Note: r and b reversed
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//QImage maskImage(reinterpret_cast<unsigned char *>(imageBits), imageWidth, imageHeight, 32, 0, 0, QImage::IgnoreEndian);
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//maskImage.setAlphaBuffer(true);
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//maskImage.save("mask.png", "PNG");
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}
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QByteArray maskData(imageWidth * imageHeight);
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const double epsilon = DBL_EPSILON;
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// Convert the rgba image into an 8-bit mask, according to the specs.
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for(int i = 0; i < imageWidth * imageHeight; i++)
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{
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Q_UINT32 rgba = imageBits[i];
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#if X_BYTE_ORDER == X_LITTLE_ENDIAN
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double r = (rgba & 0xff) / 255.0;
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double g = ((rgba >> 8) & 0xff) / 255.0;
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double b = ((rgba >> 16) & 0xff) / 255.0;
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double a = ((rgba >> 24) & 0xff) / 255.0;
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#else
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double a = (rgba & 0xff) / 255.0;
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double b = ((rgba >> 8) & 0xff) / 255.0;
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double g = ((rgba >> 16) & 0xff) / 255.0;
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double r = ((rgba >> 24) & 0xff) / 255.0;
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#endif
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// Remove pre-multiplication by alpha.
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if(a > epsilon)
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{
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r /= a;
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g /= a;
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b /= a;
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}
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// Convert to linear RGB
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r = KSVGHelper::linearRGBFromsRGB(int(r * 255 + 0.5)) / 255.0;
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g = KSVGHelper::linearRGBFromsRGB(int(g * 255 + 0.5)) / 255.0;
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b = KSVGHelper::linearRGBFromsRGB(int(b * 255 + 0.5)) / 255.0;
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// Convert 'luminance to alpha'
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double luminanceAlpha = 0.2125 * r + 0.7154 * g + 0.0721 * b;
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// Multiply by alpha.
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double maskValue = luminanceAlpha * a;
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maskData[i] = static_cast<unsigned char>(maskValue * 255 + 0.5);
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}
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delete [] imageBits;
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baseMatrix->deref();
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bbox->deref();
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// The screenToMask matrix is calculated each time the mask is used so we don't
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// need to set it here.
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QWMatrix tempMatrix;
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return Mask(maskData, tempMatrix, imageWidth, imageHeight);
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}
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SVGMaskElementImpl::Mask SVGMaskElementImpl::createMask(SVGShapeImpl *referencingElement)
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{
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converter()->finalize(referencingElement, ownerSVGElement(), maskUnits()->baseVal());
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SVGMatrixImpl *refCTM = 0;
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SVGLocatableImpl *locatableRef = dynamic_cast<SVGLocatableImpl *>(referencingElement);
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if(locatableRef)
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refCTM = locatableRef->getScreenCTM();
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else
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refCTM = SVGSVGElementImpl::createSVGMatrix();
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double xScale, yScale;
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refCTM->removeScale(&xScale, &yScale);
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refCTM->deref();
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int imageWidth = static_cast<int>(width()->baseVal()->value() * xScale + 0.5);
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int imageHeight = static_cast<int>(height()->baseVal()->value() * yScale + 0.5);
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Mask mask;
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if(imageWidth > 0 && imageHeight > 0)
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{
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CacheKey key(referencingElement, imageWidth, imageHeight);
|
||
|
|
||
|
if(!m_maskCache.find(key, mask))
|
||
|
{
|
||
|
mask = createMask(referencingElement, imageWidth, imageHeight);
|
||
|
m_maskCache.insert(key, mask, imageWidth * imageHeight);
|
||
|
}
|
||
|
|
||
|
// Generate a mask-coordinates to screen-coordinates matrix
|
||
|
SVGMatrixImpl *matrix = 0;
|
||
|
if(locatableRef)
|
||
|
matrix = locatableRef->getScreenCTM();
|
||
|
else
|
||
|
matrix = SVGSVGElementImpl::createSVGMatrix();
|
||
|
|
||
|
if(maskUnits()->baseVal() == SVGMaskElement::SVG_UNIT_TYPE_OBJECTBOUNDINGBOX)
|
||
|
{
|
||
|
SVGRectImpl *bbox = referencingElement->getBBox();
|
||
|
matrix->translate(bbox->x() + x()->baseVal()->value(), bbox->y() + y()->baseVal()->value());
|
||
|
bbox->deref();
|
||
|
}
|
||
|
else
|
||
|
matrix->translate(x()->baseVal()->value(), y()->baseVal()->value());
|
||
|
|
||
|
matrix->scaleNonUniform(1 / xScale, 1 / yScale);
|
||
|
|
||
|
QWMatrix screenToMask = matrix->qmatrix().invert();
|
||
|
matrix->deref();
|
||
|
|
||
|
mask.setScreenToMask(screenToMask);
|
||
|
}
|
||
|
|
||
|
return mask;
|
||
|
}
|
||
|
|
||
|
QByteArray SVGMaskElementImpl::maskRectangle(SVGShapeImpl *shape, const QRect& screenRectangle)
|
||
|
{
|
||
|
QByteArray cumulativeMask;
|
||
|
|
||
|
do
|
||
|
{
|
||
|
SVGStylableImpl *style = dynamic_cast<SVGStylableImpl *>(shape);
|
||
|
|
||
|
if(style && style->hasMask())
|
||
|
{
|
||
|
SVGElementImpl *element = shape->ownerDoc()->rootElement()->getElementById(style->getMask());
|
||
|
|
||
|
if(element)
|
||
|
{
|
||
|
SVGMaskElementImpl *maskElement = dynamic_cast<SVGMaskElementImpl *>(element);
|
||
|
|
||
|
if(maskElement)
|
||
|
{
|
||
|
SVGMaskElementImpl::Mask mask = maskElement->createMask(shape);
|
||
|
|
||
|
if(!mask.isEmpty())
|
||
|
{
|
||
|
QByteArray maskData = mask.rectangle(screenRectangle);
|
||
|
|
||
|
if(cumulativeMask.size() == 0)
|
||
|
cumulativeMask = maskData;
|
||
|
else
|
||
|
{
|
||
|
int size = cumulativeMask.size();
|
||
|
|
||
|
// Multiply into the cumulative mask (using fast divide by 255)
|
||
|
for(int i = 0; i < size; i++)
|
||
|
{
|
||
|
int tmp = maskData[i] * cumulativeMask[i] + 0x80;
|
||
|
cumulativeMask[i] = (tmp + (tmp >> 8)) >> 8;
|
||
|
}
|
||
|
}
|
||
|
}
|
||
|
}
|
||
|
}
|
||
|
}
|
||
|
|
||
|
DOM::Node parentNode = shape->parentNode();
|
||
|
|
||
|
if(!parentNode.isNull())
|
||
|
{
|
||
|
SVGElementImpl *parent = shape->ownerDoc()->getElementFromHandle(parentNode.handle());
|
||
|
|
||
|
if(parent)
|
||
|
shape = dynamic_cast<SVGShapeImpl *>(parent);
|
||
|
else
|
||
|
shape = 0;
|
||
|
}
|
||
|
else
|
||
|
shape = 0;
|
||
|
|
||
|
} while(shape);
|
||
|
|
||
|
return cumulativeMask;
|
||
|
}
|
||
|
|
||
|
SVGMaskElementImpl::Mask::Mask(const QByteArray& mask, const QWMatrix& screenToMask, int width, int height)
|
||
|
: m_width(width), m_height(height), m_mask(mask), m_screenToMask(screenToMask)
|
||
|
{
|
||
|
}
|
||
|
|
||
|
QByteArray SVGMaskElementImpl::Mask::rectangle(int screenX, int screenY, int width, int height)
|
||
|
{
|
||
|
QByteArray rect(width * height);
|
||
|
|
||
|
for(int x = 0; x < width; x++)
|
||
|
{
|
||
|
for(int y = 0; y < height; y++)
|
||
|
{
|
||
|
rect[x + y * width] = value(screenX + x, screenY + y);
|
||
|
}
|
||
|
}
|
||
|
|
||
|
return rect;
|
||
|
}
|
||
|
|
||
|
QByteArray SVGMaskElementImpl::Mask::rectangle(const QRect& rect)
|
||
|
{
|
||
|
return rectangle(rect.x(), rect.y(), rect.width(), rect.height());
|
||
|
}
|
||
|
|
||
|
// vim:ts=4:noet
|