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Diffstat (limited to 'WebCore/svg/SVGPreserveAspectRatio.cpp')
| -rw-r--r-- | WebCore/svg/SVGPreserveAspectRatio.cpp | 207 |
1 files changed, 207 insertions, 0 deletions
diff --git a/WebCore/svg/SVGPreserveAspectRatio.cpp b/WebCore/svg/SVGPreserveAspectRatio.cpp new file mode 100644 index 0000000..0709b9d --- /dev/null +++ b/WebCore/svg/SVGPreserveAspectRatio.cpp @@ -0,0 +1,207 @@ +/* + Copyright (C) 2004, 2005, 2008 Nikolas Zimmermann <zimmermann@kde.org> + 2004, 2005, 2006, 2007 Rob Buis <buis@kde.org> + + 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 "config.h" + +#if ENABLE(SVG) +#include "SVGPreserveAspectRatio.h" + +#include "SVGParserUtilities.h" +#include "SVGSVGElement.h" + +namespace WebCore { + +SVGPreserveAspectRatio::SVGPreserveAspectRatio() + : m_align(SVG_PRESERVEASPECTRATIO_XMIDYMID) + , m_meetOrSlice(SVG_MEETORSLICE_MEET) +{ + // FIXME: Should the two values default to UNKNOWN instead? +} + +SVGPreserveAspectRatio::~SVGPreserveAspectRatio() +{ +} + +void SVGPreserveAspectRatio::setAlign(unsigned short align) +{ + m_align = align; +} + +unsigned short SVGPreserveAspectRatio::align() const +{ + return m_align; +} + +void SVGPreserveAspectRatio::setMeetOrSlice(unsigned short meetOrSlice) +{ + m_meetOrSlice = meetOrSlice; +} + +unsigned short SVGPreserveAspectRatio::meetOrSlice() const +{ + return m_meetOrSlice; +} + +bool SVGPreserveAspectRatio::parsePreserveAspectRatio(const UChar*& currParam, const UChar* end, bool validate) +{ + SVGPreserveAspectRatioType align = SVG_PRESERVEASPECTRATIO_NONE; + SVGMeetOrSliceType meetOrSlice = SVG_MEETORSLICE_MEET; + bool ret = false; + + if (!skipOptionalSpaces(currParam, end)) + goto bail_out; + + if (*currParam == 'd') { + if (!skipString(currParam, end, "defer")) + goto bail_out; + // FIXME: We just ignore the "defer" here. + if (!skipOptionalSpaces(currParam, end)) + goto bail_out; + } + + if (*currParam == 'n') { + if (!skipString(currParam, end, "none")) + goto bail_out; + skipOptionalSpaces(currParam, end); + } else if (*currParam == 'x') { + if ((end - currParam) < 8) + goto bail_out; + if (currParam[1] != 'M' || currParam[4] != 'Y' || currParam[5] != 'M') + goto bail_out; + if (currParam[2] == 'i') { + if (currParam[3] == 'n') { + if (currParam[6] == 'i') { + if (currParam[7] == 'n') + align = SVG_PRESERVEASPECTRATIO_XMINYMIN; + else if (currParam[7] == 'd') + align = SVG_PRESERVEASPECTRATIO_XMINYMID; + else + goto bail_out; + } else if (currParam[6] == 'a' && currParam[7] == 'x') + align = SVG_PRESERVEASPECTRATIO_XMINYMAX; + else + goto bail_out; + } else if (currParam[3] == 'd') { + if (currParam[6] == 'i') { + if (currParam[7] == 'n') + align = SVG_PRESERVEASPECTRATIO_XMIDYMIN; + else if (currParam[7] == 'd') + align = SVG_PRESERVEASPECTRATIO_XMIDYMID; + else + goto bail_out; + } else if (currParam[6] == 'a' && currParam[7] == 'x') + align = SVG_PRESERVEASPECTRATIO_XMIDYMAX; + else + goto bail_out; + } else + goto bail_out; + } else if (currParam[2] == 'a' && currParam[3] == 'x') { + if (currParam[6] == 'i') { + if (currParam[7] == 'n') + align = SVG_PRESERVEASPECTRATIO_XMAXYMIN; + else if (currParam[7] == 'd') + align = SVG_PRESERVEASPECTRATIO_XMAXYMID; + else + goto bail_out; + } else if (currParam[6] == 'a' && currParam[7] == 'x') + align = SVG_PRESERVEASPECTRATIO_XMAXYMAX; + else + goto bail_out; + } else + goto bail_out; + currParam += 8; + skipOptionalSpaces(currParam, end); + } else + goto bail_out; + + if (currParam < end) { + if (*currParam == 'm') { + if (!skipString(currParam, end, "meet")) + goto bail_out; + skipOptionalSpaces(currParam, end); + } else if (*currParam == 's') { + if (!skipString(currParam, end, "slice")) + goto bail_out; + skipOptionalSpaces(currParam, end); + if (align != SVG_PRESERVEASPECTRATIO_NONE) + meetOrSlice = SVG_MEETORSLICE_SLICE; + } + } + + if (end != currParam && validate) { +bail_out: + // FIXME: Should the two values be set to UNKNOWN instead? + align = SVG_PRESERVEASPECTRATIO_NONE; + meetOrSlice = SVG_MEETORSLICE_MEET; + } else + ret = true; + + if (m_align == align && m_meetOrSlice == meetOrSlice) + return ret; + + m_align = align; + m_meetOrSlice = meetOrSlice; + return ret; +} + +AffineTransform SVGPreserveAspectRatio::getCTM(double logicX, double logicY, + double logicWidth, double logicHeight, + double /*physX*/, double /*physY*/, + double physWidth, double physHeight) +{ + AffineTransform temp; + + if (align() == SVG_PRESERVEASPECTRATIO_UNKNOWN) + return temp; + + double vpar = logicWidth / logicHeight; + double svgar = physWidth / physHeight; + + if (align() == SVG_PRESERVEASPECTRATIO_NONE) { + temp.scale(physWidth / logicWidth, physHeight / logicHeight); + temp.translate(-logicX, -logicY); + } else if (vpar < svgar && (meetOrSlice() == SVG_MEETORSLICE_MEET) || vpar >= svgar && (meetOrSlice() == SVG_MEETORSLICE_SLICE)) { + temp.scale(physHeight / logicHeight, physHeight / logicHeight); + + if (align() == SVG_PRESERVEASPECTRATIO_XMINYMIN || align() == SVG_PRESERVEASPECTRATIO_XMINYMID || align() == SVG_PRESERVEASPECTRATIO_XMINYMAX) + temp.translate(-logicX, -logicY); + else if (align() == SVG_PRESERVEASPECTRATIO_XMIDYMIN || align() == SVG_PRESERVEASPECTRATIO_XMIDYMID || align() == SVG_PRESERVEASPECTRATIO_XMIDYMAX) + temp.translate(-logicX - (logicWidth - physWidth * logicHeight / physHeight) / 2, -logicY); + else + temp.translate(-logicX - (logicWidth - physWidth * logicHeight / physHeight), -logicY); + } else { + temp.scale(physWidth / logicWidth, physWidth / logicWidth); + + if (align() == SVG_PRESERVEASPECTRATIO_XMINYMIN || align() == SVG_PRESERVEASPECTRATIO_XMIDYMIN || align() == SVG_PRESERVEASPECTRATIO_XMAXYMIN) + temp.translate(-logicX, -logicY); + else if (align() == SVG_PRESERVEASPECTRATIO_XMINYMID || align() == SVG_PRESERVEASPECTRATIO_XMIDYMID || align() == SVG_PRESERVEASPECTRATIO_XMAXYMID) + temp.translate(-logicX, -logicY - (logicHeight - physHeight * logicWidth / physWidth) / 2); + else + temp.translate(-logicX, -logicY - (logicHeight - physHeight * logicWidth / physWidth)); + } + + return temp; +} + +} + +#endif // ENABLE(SVG) |