| /* |
| Copyright (C) 2004, 2005, 2008 Nikolas Zimmermann <zimmermann@kde.org> |
| 2004, 2005, 2006, 2007 Rob Buis <buis@kde.org> |
| 2010 Dirk Schulze <krit@webkit.org> |
| |
| 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 "AffineTransform.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; |
| } |
| |
| SVGPreserveAspectRatio SVGPreserveAspectRatio::parsePreserveAspectRatio(const UChar*& currParam, const UChar* end, bool validate, bool& result) |
| { |
| SVGPreserveAspectRatio aspectRatio; |
| aspectRatio.m_align = SVG_PRESERVEASPECTRATIO_NONE; |
| aspectRatio.m_meetOrSlice = SVG_MEETORSLICE_MEET; |
| result = 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') |
| aspectRatio.m_align = SVG_PRESERVEASPECTRATIO_XMINYMIN; |
| else if (currParam[7] == 'd') |
| aspectRatio.m_align = SVG_PRESERVEASPECTRATIO_XMINYMID; |
| else |
| goto bail_out; |
| } else if (currParam[6] == 'a' && currParam[7] == 'x') |
| aspectRatio.m_align = SVG_PRESERVEASPECTRATIO_XMINYMAX; |
| else |
| goto bail_out; |
| } else if (currParam[3] == 'd') { |
| if (currParam[6] == 'i') { |
| if (currParam[7] == 'n') |
| aspectRatio.m_align = SVG_PRESERVEASPECTRATIO_XMIDYMIN; |
| else if (currParam[7] == 'd') |
| aspectRatio.m_align = SVG_PRESERVEASPECTRATIO_XMIDYMID; |
| else |
| goto bail_out; |
| } else if (currParam[6] == 'a' && currParam[7] == 'x') |
| aspectRatio.m_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') |
| aspectRatio.m_align = SVG_PRESERVEASPECTRATIO_XMAXYMIN; |
| else if (currParam[7] == 'd') |
| aspectRatio.m_align = SVG_PRESERVEASPECTRATIO_XMAXYMID; |
| else |
| goto bail_out; |
| } else if (currParam[6] == 'a' && currParam[7] == 'x') |
| aspectRatio.m_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 (aspectRatio.m_align != SVG_PRESERVEASPECTRATIO_NONE) |
| aspectRatio.m_meetOrSlice = SVG_MEETORSLICE_SLICE; |
| } |
| } |
| |
| if (end != currParam && validate) { |
| bail_out: |
| // FIXME: Should the two values be set to UNKNOWN instead? |
| aspectRatio.m_align = SVG_PRESERVEASPECTRATIO_NONE; |
| aspectRatio.m_meetOrSlice = SVG_MEETORSLICE_MEET; |
| } else |
| result = true; |
| |
| return aspectRatio; |
| } |
| |
| void SVGPreserveAspectRatio::transformRect(FloatRect& destRect, FloatRect& srcRect) |
| { |
| FloatSize imageSize = srcRect.size(); |
| float origDestWidth = destRect.width(); |
| float origDestHeight = destRect.height(); |
| if (meetOrSlice() == SVGPreserveAspectRatio::SVG_MEETORSLICE_MEET) { |
| float widthToHeightMultiplier = srcRect.height() / srcRect.width(); |
| if (origDestHeight > (origDestWidth * widthToHeightMultiplier)) { |
| destRect.setHeight(origDestWidth * widthToHeightMultiplier); |
| switch (align()) { |
| case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMINYMID: |
| case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMIDYMID: |
| case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMAXYMID: |
| destRect.setY(destRect.y() + origDestHeight / 2.0f - destRect.height() / 2.0f); |
| break; |
| case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMINYMAX: |
| case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMIDYMAX: |
| case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMAXYMAX: |
| destRect.setY(destRect.y() + origDestHeight - destRect.height()); |
| break; |
| } |
| } |
| if (origDestWidth > (origDestHeight / widthToHeightMultiplier)) { |
| destRect.setWidth(origDestHeight / widthToHeightMultiplier); |
| switch (align()) { |
| case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMIDYMIN: |
| case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMIDYMID: |
| case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMIDYMAX: |
| destRect.setX(destRect.x() + origDestWidth / 2.0f - destRect.width() / 2.0f); |
| break; |
| case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMAXYMIN: |
| case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMAXYMID: |
| case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMAXYMAX: |
| destRect.setX(destRect.x() + origDestWidth - destRect.width()); |
| break; |
| } |
| } |
| } else if (meetOrSlice() == SVGPreserveAspectRatio::SVG_MEETORSLICE_SLICE) { |
| float widthToHeightMultiplier = srcRect.height() / srcRect.width(); |
| // if the destination height is less than the height of the image we'll be drawing |
| if (origDestHeight < (origDestWidth * widthToHeightMultiplier)) { |
| float destToSrcMultiplier = srcRect.width() / destRect.width(); |
| srcRect.setHeight(destRect.height() * destToSrcMultiplier); |
| switch (align()) { |
| case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMINYMID: |
| case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMIDYMID: |
| case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMAXYMID: |
| srcRect.setY(destRect.y() + imageSize.height() / 2.0f - srcRect.height() / 2.0f); |
| break; |
| case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMINYMAX: |
| case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMIDYMAX: |
| case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMAXYMAX: |
| srcRect.setY(destRect.y() + imageSize.height() - srcRect.height()); |
| break; |
| } |
| } |
| // if the destination width is less than the width of the image we'll be drawing |
| if (origDestWidth < (origDestHeight / widthToHeightMultiplier)) { |
| float destToSrcMultiplier = srcRect.height() / destRect.height(); |
| srcRect.setWidth(destRect.width() * destToSrcMultiplier); |
| switch (align()) { |
| case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMIDYMIN: |
| case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMIDYMID: |
| case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMIDYMAX: |
| srcRect.setX(destRect.x() + imageSize.width() / 2.0f - srcRect.width() / 2.0f); |
| break; |
| case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMAXYMIN: |
| case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMAXYMID: |
| case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMAXYMAX: |
| srcRect.setX(destRect.x() + imageSize.width() - srcRect.width()); |
| break; |
| } |
| } |
| } |
| } |
| |
| AffineTransform SVGPreserveAspectRatio::getCTM(double logicX, double logicY, |
| double logicWidth, double logicHeight, |
| double /*physX*/, double /*physY*/, |
| double physWidth, double physHeight) const |
| { |
| AffineTransform 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) |
