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-rw-r--r--ksvg/impl/SVGMaskElementImpl.cc542
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diff --git a/ksvg/impl/SVGMaskElementImpl.cc b/ksvg/impl/SVGMaskElementImpl.cc
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+/*
+ Copyright (C) 2001-2003 KSVG Team
+ This file is part of the KDE project
+
+ 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 <cfloat>
+
+#include <kdebug.h>
+#include <qimage.h>
+
+#include "SVGMaskElement.h"
+
+#include "SVGRectImpl.h"
+#include "SVGDocumentImpl.h"
+#include "SVGSVGElementImpl.h"
+#include "SVGMaskElementImpl.h"
+#include "SVGAnimatedLengthImpl.h"
+#include "SVGAnimatedEnumerationImpl.h"
+#include "SVGUnitConverter.h"
+#include "SVGShapeImpl.h"
+#include "SVGMatrixImpl.h"
+#include "KSVGCanvas.h"
+#include "CanvasItems.h"
+#include "CanvasFactory.h"
+#include "KSVGHelper.h"
+
+#include <X11/Xos.h>
+
+using namespace KSVG;
+
+#include "SVGMaskElementImpl.lut.h"
+#include "ksvg_scriptinterpreter.h"
+#include "ksvg_ecma.h"
+
+SVGMaskElementImpl::SVGMaskElementImpl(DOM::ElementImpl *impl) : SVGElementImpl(impl), SVGTestsImpl(), SVGLangSpaceImpl(), SVGExternalResourcesRequiredImpl(), SVGStylableImpl(this), SVGBBoxTarget()
+{
+ KSVG_EMPTY_FLAGS
+
+ m_x = new SVGAnimatedLengthImpl(LENGTHMODE_WIDTH, this);
+ m_x->ref();
+
+ m_y = new SVGAnimatedLengthImpl(LENGTHMODE_HEIGHT, this);
+ m_y->ref();
+
+ m_width = new SVGAnimatedLengthImpl(LENGTHMODE_WIDTH, this);
+ m_width->ref();
+
+ m_height = new SVGAnimatedLengthImpl(LENGTHMODE_HEIGHT, this);
+ m_height->ref();
+
+ m_maskUnits = new SVGAnimatedEnumerationImpl();
+ m_maskUnits->ref();
+
+ m_maskContentUnits = new SVGAnimatedEnumerationImpl();
+ m_maskContentUnits->ref();
+
+ m_converter = new SVGUnitConverter();
+ m_converter->add(m_x);
+ m_converter->add(m_y);
+ m_converter->add(m_width);
+ m_converter->add(m_height);
+
+ m_canvas = 0;
+
+ m_maskCache.setMaxTotalCost(1024 * 1024);
+}
+
+SVGMaskElementImpl::~SVGMaskElementImpl()
+{
+ if(m_x)
+ m_x->deref();
+ if(m_y)
+ m_y->deref();
+ if(m_width)
+ m_width->deref();
+ if(m_height)
+ m_height->deref();
+ if(m_maskUnits)
+ m_maskContentUnits->deref();
+ if(m_maskUnits)
+ m_maskContentUnits->deref();
+ delete m_converter;
+ if(m_canvas)
+ delete m_canvas;
+}
+
+SVGAnimatedEnumerationImpl *SVGMaskElementImpl::maskUnits() const
+{
+ return m_maskUnits;
+}
+
+SVGAnimatedEnumerationImpl *SVGMaskElementImpl::maskContentUnits() const
+{
+ return m_maskContentUnits;
+}
+
+SVGAnimatedLengthImpl *SVGMaskElementImpl::x() const
+{
+ return m_x;
+}
+
+SVGAnimatedLengthImpl *SVGMaskElementImpl::y() const
+{
+ return m_y;
+}
+
+SVGAnimatedLengthImpl *SVGMaskElementImpl::width() const
+{
+ return m_width;
+}
+
+SVGAnimatedLengthImpl *SVGMaskElementImpl::height() const
+{
+ return m_height;
+}
+
+/*
+@namespace KSVG
+@begin SVGMaskElementImpl::s_hashTable 7
+ maskUnits SVGMaskElementImpl::MaskUnits DontDelete|ReadOnly
+ maskContentUnits SVGMaskElementImpl::MaskContentUnits DontDelete|ReadOnly
+ x SVGMaskElementImpl::X DontDelete|ReadOnly
+ y SVGMaskElementImpl::Y DontDelete|ReadOnly
+ width SVGMaskElementImpl::Width DontDelete|ReadOnly
+ height SVGMaskElementImpl::Height DontDelete|ReadOnly
+@end
+*/
+Value SVGMaskElementImpl::getValueProperty(ExecState *exec, int token) const
+{
+ KSVG_CHECK_ATTRIBUTE
+
+ switch(token)
+ {
+ case MaskUnits:
+ if(!attributeMode)
+ return m_maskUnits->cache(exec);
+ else
+ return Number(m_maskUnits->baseVal());
+ case MaskContentUnits:
+ if(!attributeMode)
+ return m_maskContentUnits->cache(exec);
+ else
+ return Number(m_maskContentUnits->baseVal());
+ case X:
+ if(!attributeMode)
+ return m_x->cache(exec);
+ else
+ return Number(m_x->baseVal()->value());
+ case Y:
+ if(!attributeMode)
+ return m_y->cache(exec);
+ else
+ return Number(m_y->baseVal()->value());
+ case Width:
+ if(!attributeMode)
+ return m_width->cache(exec);
+ else
+ return Number(m_width->baseVal()->value());
+
+ case Height:
+ if(!attributeMode)
+ return m_height->cache(exec);
+ else
+ return Number(m_height->baseVal()->value());
+ default:
+ kdWarning() << "Unhandled token in " << k_funcinfo << " : " << token << endl;
+ return Undefined();
+ }
+}
+
+void SVGMaskElementImpl::putValueProperty(ExecState *exec, int token, const Value &value, int attr)
+{
+ // This class has just ReadOnly properties, only with the Internal flag set
+ // it's allowed to modify those.
+ if(!(attr & KJS::Internal))
+ return;
+
+ switch(token)
+ {
+ case MaskUnits:
+ if(value.toString(exec).qstring() == "objectBoundingBox")
+ m_maskUnits->setBaseVal(SVGMaskElement::SVG_UNIT_TYPE_OBJECTBOUNDINGBOX);
+ else
+ m_maskUnits->setBaseVal(SVGMaskElement::SVG_UNIT_TYPE_USERSPACEONUSE);
+ break;
+ case MaskContentUnits:
+ if(value.toString(exec).qstring() == "objectBoundingBox")
+ m_maskContentUnits->setBaseVal(SVGMaskElement::SVG_UNIT_TYPE_OBJECTBOUNDINGBOX);
+ else
+ m_maskContentUnits->setBaseVal(SVGMaskElement::SVG_UNIT_TYPE_USERSPACEONUSE);
+ break;
+ case X:
+ converter()->modify(x(), value.toString(exec).qstring());
+ break;
+ case Y:
+ converter()->modify(y(), value.toString(exec).qstring());
+ break;
+ case Width:
+ converter()->modify(width(), value.toString(exec).qstring());
+ break;
+ case Height:
+ converter()->modify(height(), value.toString(exec).qstring());
+ break;
+ default:
+ kdWarning() << "Unhandled token in " << k_funcinfo << " : " << token << endl;
+ }
+}
+
+SVGRectImpl *SVGMaskElementImpl::getBBox()
+{
+ SVGRectImpl *ret = SVGSVGElementImpl::createSVGRect();
+ ret->setX(m_x->baseVal()->value());
+ ret->setY(m_y->baseVal()->value());
+ ret->setWidth(m_width->baseVal()->value());
+ ret->setHeight(m_height->baseVal()->value());
+ return ret;
+}
+
+void SVGMaskElementImpl::setAttributes()
+{
+ SVGElementImpl::setAttributes();
+
+ // Spec: if attribute not specified, use objectBoundingBox
+ if(KSVG_TOKEN_NOT_PARSED(MaskUnits))
+ KSVG_SET_ALT_ATTRIBUTE(MaskUnits, "objectBoundingBox")
+
+ // Spec: if attribute not specified, use userSpaceOnUse
+ if(KSVG_TOKEN_NOT_PARSED(MaskContentUnits))
+ KSVG_SET_ALT_ATTRIBUTE(MaskContentUnits, "userSpaceOnUse")
+
+ // Spec: if attribute not specified, use "-10%"
+ if(KSVG_TOKEN_NOT_PARSED(X))
+ KSVG_SET_ALT_ATTRIBUTE(X, "-10%");
+
+ // Spec: if attribute not specified, use "-10%"
+ if(KSVG_TOKEN_NOT_PARSED(Y))
+ KSVG_SET_ALT_ATTRIBUTE(Y, "-10%");
+
+ // Spec: if attribute not specified, use "120%"
+ if(KSVG_TOKEN_NOT_PARSED(Width))
+ KSVG_SET_ALT_ATTRIBUTE(Width, "120%");
+
+ // Spec: if attribute not specified, use "120%"
+ if(KSVG_TOKEN_NOT_PARSED(Height))
+ KSVG_SET_ALT_ATTRIBUTE(Height, "120%");
+}
+
+SVGMaskElementImpl::Mask SVGMaskElementImpl::createMask(SVGShapeImpl *referencingElement, int imageWidth, int imageHeight)
+{
+ converter()->finalize(referencingElement, ownerSVGElement(), maskUnits()->baseVal());
+
+ Q_UINT32 *imageBits = new Q_UINT32[imageWidth * imageHeight];
+
+ if(m_canvas == 0)
+ m_canvas = CanvasFactory::self()->loadCanvas(imageWidth, imageHeight);
+
+ m_canvas->setup(reinterpret_cast<unsigned char *>(imageBits), imageWidth, imageHeight);
+ m_canvas->setBackgroundColor(qRgba(0, 0, 0, 0));
+
+ SVGMatrixImpl *baseMatrix = SVGSVGElementImpl::createSVGMatrix();
+
+ // Set the scale to map the mask onto the image
+ double xScale = static_cast<double>(imageWidth) / width()->baseVal()->value();
+ double yScale = static_cast<double>(imageHeight) / height()->baseVal()->value();
+
+ baseMatrix->scaleNonUniform(xScale, yScale);
+
+ SVGRectImpl *bbox = referencingElement->getBBox();
+
+ if(maskUnits()->baseVal() == SVGMaskElement::SVG_UNIT_TYPE_OBJECTBOUNDINGBOX)
+ baseMatrix->translate(-(bbox->x() + x()->baseVal()->value()), -(bbox->y() + y()->baseVal()->value()));
+ else
+ baseMatrix->translate(-x()->baseVal()->value(), -y()->baseVal()->value());
+
+ if(maskContentUnits()->baseVal() == SVGMaskElement::SVG_UNIT_TYPE_OBJECTBOUNDINGBOX)
+ {
+ baseMatrix->translate(bbox->x(), bbox->y());
+ baseMatrix->scaleNonUniform(bbox->width(), bbox->height());
+ }
+
+ for(DOM::Node node = firstChild(); !node.isNull(); node = node.nextSibling())
+ {
+ SVGElementImpl *element = ownerDoc()->getElementFromHandle(node.handle());
+ SVGShapeImpl *shape = dynamic_cast<SVGShapeImpl *>(element);
+ SVGTestsImpl *tests = dynamic_cast<SVGTestsImpl *>(element);
+ SVGStylableImpl *style = dynamic_cast<SVGStylableImpl *>(element);
+
+ bool ok = tests ? tests->ok() : true;
+ if(element && shape && style && ok && style->getVisible() && style->getDisplay())
+ {
+ SVGLocatableImpl *locatable = dynamic_cast<SVGLocatableImpl *>(element);
+ if(locatable)
+ locatable->updateCachedScreenCTM(baseMatrix);
+
+ element->createItem(m_canvas);
+ if(shape->item())
+ {
+ shape->item()->setReferenced(true);
+ m_canvas->invalidate(shape->item(), true);
+ }
+ }
+ }
+
+ m_canvas->update(float(1));
+
+ for(DOM::Node node = firstChild(); !node.isNull(); node = node.nextSibling())
+ {
+ SVGElementImpl *element = ownerDoc()->getElementFromHandle(node.handle());
+ SVGShapeImpl *shape = dynamic_cast<SVGShapeImpl *>(element);
+ SVGTestsImpl *tests = dynamic_cast<SVGTestsImpl *>(element);
+ SVGStylableImpl *style = dynamic_cast<SVGStylableImpl *>(element);
+
+ bool ok = tests ? tests->ok() : true;
+ if(element && shape && style && ok && style->getVisible() && style->getDisplay())
+ {
+ if(shape)
+ shape->removeItem(m_canvas);
+ }
+ }
+
+
+ {
+ // Note: r and b reversed
+ //QImage maskImage(reinterpret_cast<unsigned char *>(imageBits), imageWidth, imageHeight, 32, 0, 0, QImage::IgnoreEndian);
+ //maskImage.setAlphaBuffer(true);
+ //maskImage.save("mask.png", "PNG");
+ }
+
+ QByteArray maskData(imageWidth * imageHeight);
+ const double epsilon = DBL_EPSILON;
+
+ // Convert the rgba image into an 8-bit mask, according to the specs.
+ for(int i = 0; i < imageWidth * imageHeight; i++)
+ {
+ Q_UINT32 rgba = imageBits[i];
+
+#if X_BYTE_ORDER == X_LITTLE_ENDIAN
+ double r = (rgba & 0xff) / 255.0;
+ double g = ((rgba >> 8) & 0xff) / 255.0;
+ double b = ((rgba >> 16) & 0xff) / 255.0;
+ double a = ((rgba >> 24) & 0xff) / 255.0;
+#else
+ double a = (rgba & 0xff) / 255.0;
+ double b = ((rgba >> 8) & 0xff) / 255.0;
+ double g = ((rgba >> 16) & 0xff) / 255.0;
+ double r = ((rgba >> 24) & 0xff) / 255.0;
+#endif
+
+ // Remove pre-multiplication by alpha.
+ if(a > epsilon)
+ {
+ r /= a;
+ g /= a;
+ b /= a;
+ }
+
+ // Convert to linear RGB
+ r = KSVGHelper::linearRGBFromsRGB(int(r * 255 + 0.5)) / 255.0;
+ g = KSVGHelper::linearRGBFromsRGB(int(g * 255 + 0.5)) / 255.0;
+ b = KSVGHelper::linearRGBFromsRGB(int(b * 255 + 0.5)) / 255.0;
+
+ // Convert 'luminance to alpha'
+ double luminanceAlpha = 0.2125 * r + 0.7154 * g + 0.0721 * b;
+
+ // Multiply by alpha.
+ double maskValue = luminanceAlpha * a;
+
+ maskData[i] = static_cast<unsigned char>(maskValue * 255 + 0.5);
+ }
+
+ delete [] imageBits;
+
+ baseMatrix->deref();
+ bbox->deref();
+
+ // The screenToMask matrix is calculated each time the mask is used so we don't
+ // need to set it here.
+ QWMatrix tempMatrix;
+
+ return Mask(maskData, tempMatrix, imageWidth, imageHeight);
+}
+
+SVGMaskElementImpl::Mask SVGMaskElementImpl::createMask(SVGShapeImpl *referencingElement)
+{
+ converter()->finalize(referencingElement, ownerSVGElement(), maskUnits()->baseVal());
+
+ SVGMatrixImpl *refCTM = 0;
+ SVGLocatableImpl *locatableRef = dynamic_cast<SVGLocatableImpl *>(referencingElement);
+ if(locatableRef)
+ refCTM = locatableRef->getScreenCTM();
+ else
+ refCTM = SVGSVGElementImpl::createSVGMatrix();
+
+ double xScale, yScale;
+
+ refCTM->removeScale(&xScale, &yScale);
+ refCTM->deref();
+
+ int imageWidth = static_cast<int>(width()->baseVal()->value() * xScale + 0.5);
+ int imageHeight = static_cast<int>(height()->baseVal()->value() * yScale + 0.5);
+
+ Mask mask;
+
+ if(imageWidth > 0 && imageHeight > 0)
+ {
+ 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