diff options
Diffstat (limited to 'ksvg/impl/SVGMaskElementImpl.cc')
| -rw-r--r-- | ksvg/impl/SVGMaskElementImpl.cc | 542 |
1 files changed, 542 insertions, 0 deletions
diff --git a/ksvg/impl/SVGMaskElementImpl.cc b/ksvg/impl/SVGMaskElementImpl.cc new file mode 100644 index 00000000..5cd2151e --- /dev/null +++ b/ksvg/impl/SVGMaskElementImpl.cc @@ -0,0 +1,542 @@ +/* + 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 |