/* Copyright (C) 2004, 2005, 2008 Nikolas Zimmermann 2004, 2005, 2006, 2007 Rob Buis 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 "TransformationMatrix.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; } TransformationMatrix SVGPreserveAspectRatio::getCTM(double logicX, double logicY, double logicWidth, double logicHeight, double /*physX*/, double /*physY*/, double physWidth, double physHeight) { TransformationMatrix temp; if (align() == SVG_PRESERVEASPECTRATIO_UNKNOWN) return temp; double vpar = logicWidth / logicHeight; double svgar = physWidth / physHeight; if (align() == SVG_PRESERVEASPECTRATIO_NONE) { temp.scaleNonUniform(physWidth / logicWidth, physHeight / logicHeight); temp.translate(-logicX, -logicY); } else if ((vpar < svgar && (meetOrSlice() == SVG_MEETORSLICE_MEET)) || (vpar >= svgar && (meetOrSlice() == SVG_MEETORSLICE_SLICE))) { temp.scaleNonUniform(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.scaleNonUniform(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; } String SVGPreserveAspectRatio::valueAsString() const { String result; switch ((SVGPreserveAspectRatioType) align()) { default: case SVG_PRESERVEASPECTRATIO_NONE: result = "none"; break; case SVG_PRESERVEASPECTRATIO_XMINYMIN: result = "xMinYMin"; break; case SVG_PRESERVEASPECTRATIO_XMIDYMIN: result = "xMidYMin"; break; case SVG_PRESERVEASPECTRATIO_XMAXYMIN: result = "xMaxYMin"; break; case SVG_PRESERVEASPECTRATIO_XMINYMID: result = "xMinYMid"; break; case SVG_PRESERVEASPECTRATIO_XMIDYMID: result = "xMidYMid"; break; case SVG_PRESERVEASPECTRATIO_XMAXYMID: result = "xMaxYMid"; break; case SVG_PRESERVEASPECTRATIO_XMINYMAX: result = "xMinYMax"; break; case SVG_PRESERVEASPECTRATIO_XMIDYMAX: result = "xMidYMax"; break; case SVG_PRESERVEASPECTRATIO_XMAXYMAX: result = "xMaxYMax"; break; }; switch ((SVGMeetOrSliceType) meetOrSlice()) { default: case SVG_MEETORSLICE_UNKNOWN: break; case SVG_MEETORSLICE_MEET: result += " meet"; break; case SVG_MEETORSLICE_SLICE: result += " slice"; break; }; return result; } } #endif // ENABLE(SVG)