| /* |
| * Copyright (C) 2004, 2005, 2008 Nikolas Zimmermann <zimmermann@kde.org> |
| * Copyright (C) 2004, 2005, 2006, 2007 Rob Buis <buis@kde.org> |
| * Copyright (C) 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 "FloatRect.h" |
| #include "SVGParserUtilities.h" |
| #include <wtf/text/StringConcatenate.h> |
| |
| namespace WebCore { |
| |
| SVGPreserveAspectRatio::SVGPreserveAspectRatio() |
| : m_align(SVG_PRESERVEASPECTRATIO_XMIDYMID) |
| , m_meetOrSlice(SVG_MEETORSLICE_MEET) |
| { |
| } |
| |
| void SVGPreserveAspectRatio::setAlign(unsigned short align, ExceptionCode& ec) |
| { |
| if (align == SVG_PRESERVEASPECTRATIO_UNKNOWN || align > SVG_PRESERVEASPECTRATIO_XMAXYMAX) { |
| ec = NOT_SUPPORTED_ERR; |
| return; |
| } |
| |
| m_align = static_cast<SVGPreserveAspectRatioType>(align); |
| } |
| |
| void SVGPreserveAspectRatio::setMeetOrSlice(unsigned short meetOrSlice, ExceptionCode& ec) |
| { |
| if (meetOrSlice == SVG_MEETORSLICE_UNKNOWN || meetOrSlice > SVG_MEETORSLICE_SLICE) { |
| ec = NOT_SUPPORTED_ERR; |
| return; |
| } |
| |
| m_meetOrSlice = static_cast<SVGMeetOrSliceType>(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; |
| |
| // FIXME: Rewrite this parser, without gotos! |
| if (!skipOptionalSpaces(currParam, end)) |
| goto bailOut; |
| |
| if (*currParam == 'd') { |
| if (!skipString(currParam, end, "defer")) |
| goto bailOut; |
| // FIXME: We just ignore the "defer" here. |
| if (!skipOptionalSpaces(currParam, end)) |
| goto bailOut; |
| } |
| |
| if (*currParam == 'n') { |
| if (!skipString(currParam, end, "none")) |
| goto bailOut; |
| skipOptionalSpaces(currParam, end); |
| } else if (*currParam == 'x') { |
| if ((end - currParam) < 8) |
| goto bailOut; |
| if (currParam[1] != 'M' || currParam[4] != 'Y' || currParam[5] != 'M') |
| goto bailOut; |
| 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 bailOut; |
| } else if (currParam[6] == 'a' && currParam[7] == 'x') |
| aspectRatio.m_align = SVG_PRESERVEASPECTRATIO_XMINYMAX; |
| else |
| goto bailOut; |
| } 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 bailOut; |
| } else if (currParam[6] == 'a' && currParam[7] == 'x') |
| aspectRatio.m_align = SVG_PRESERVEASPECTRATIO_XMIDYMAX; |
| else |
| goto bailOut; |
| } else |
| goto bailOut; |
| } 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 bailOut; |
| } else if (currParam[6] == 'a' && currParam[7] == 'x') |
| aspectRatio.m_align = SVG_PRESERVEASPECTRATIO_XMAXYMAX; |
| else |
| goto bailOut; |
| } else |
| goto bailOut; |
| currParam += 8; |
| skipOptionalSpaces(currParam, end); |
| } else |
| goto bailOut; |
| |
| if (currParam < end) { |
| if (*currParam == 'm') { |
| if (!skipString(currParam, end, "meet")) |
| goto bailOut; |
| skipOptionalSpaces(currParam, end); |
| } else if (*currParam == 's') { |
| if (!skipString(currParam, end, "slice")) |
| goto bailOut; |
| skipOptionalSpaces(currParam, end); |
| if (aspectRatio.m_align != SVG_PRESERVEASPECTRATIO_NONE) |
| aspectRatio.m_meetOrSlice = SVG_MEETORSLICE_SLICE; |
| } |
| } |
| |
| if (end != currParam && validate) { |
| bailOut: |
| // 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(); |
| switch (m_meetOrSlice) { |
| case SVGPreserveAspectRatio::SVG_MEETORSLICE_UNKNOWN: |
| break; |
| case SVGPreserveAspectRatio::SVG_MEETORSLICE_MEET: { |
| float widthToHeightMultiplier = srcRect.height() / srcRect.width(); |
| if (origDestHeight > origDestWidth * widthToHeightMultiplier) { |
| destRect.setHeight(origDestWidth * widthToHeightMultiplier); |
| switch (m_align) { |
| case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMINYMID: |
| case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMIDYMID: |
| case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMAXYMID: |
| destRect.setY(destRect.y() + origDestHeight / 2 - destRect.height() / 2); |
| break; |
| case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMINYMAX: |
| case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMIDYMAX: |
| case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMAXYMAX: |
| destRect.setY(destRect.y() + origDestHeight - destRect.height()); |
| break; |
| default: |
| break; |
| } |
| } |
| if (origDestWidth > origDestHeight / widthToHeightMultiplier) { |
| destRect.setWidth(origDestHeight / widthToHeightMultiplier); |
| switch (m_align) { |
| case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMIDYMIN: |
| case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMIDYMID: |
| case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMIDYMAX: |
| destRect.setX(destRect.x() + origDestWidth / 2 - destRect.width() / 2); |
| break; |
| case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMAXYMIN: |
| case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMAXYMID: |
| case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMAXYMAX: |
| destRect.setX(destRect.x() + origDestWidth - destRect.width()); |
| break; |
| default: |
| break; |
| } |
| } |
| break; |
| } |
| case 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 (m_align) { |
| case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMINYMID: |
| case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMIDYMID: |
| case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMAXYMID: |
| srcRect.setY(destRect.y() + imageSize.height() / 2 - srcRect.height() / 2); |
| 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; |
| default: |
| 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 (m_align) { |
| case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMIDYMIN: |
| case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMIDYMID: |
| case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMIDYMAX: |
| srcRect.setX(destRect.x() + imageSize.width() / 2 - srcRect.width() / 2); |
| 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; |
| default: |
| break; |
| } |
| } |
| break; |
| } |
| } |
| } |
| |
| AffineTransform SVGPreserveAspectRatio::getCTM(float logicX, float logicY, float logicWidth, float logicHeight, float physWidth, float physHeight) const |
| { |
| AffineTransform transform; |
| if (m_align == SVG_PRESERVEASPECTRATIO_UNKNOWN) |
| return transform; |
| |
| float logicalRatio = logicWidth / logicHeight; |
| float physRatio = physWidth / physHeight; |
| |
| if (m_align == SVG_PRESERVEASPECTRATIO_NONE) { |
| transform.scaleNonUniform(physWidth / logicWidth, physHeight / logicHeight); |
| transform.translate(-logicX, -logicY); |
| return transform; |
| } |
| |
| if ((logicalRatio < physRatio && (m_meetOrSlice == SVG_MEETORSLICE_MEET)) || (logicalRatio >= physRatio && (m_meetOrSlice == SVG_MEETORSLICE_SLICE))) { |
| transform.scaleNonUniform(physHeight / logicHeight, physHeight / logicHeight); |
| |
| if (m_align == SVG_PRESERVEASPECTRATIO_XMINYMIN || m_align == SVG_PRESERVEASPECTRATIO_XMINYMID || m_align == SVG_PRESERVEASPECTRATIO_XMINYMAX) |
| transform.translate(-logicX, -logicY); |
| else if (m_align == SVG_PRESERVEASPECTRATIO_XMIDYMIN || m_align == SVG_PRESERVEASPECTRATIO_XMIDYMID || m_align == SVG_PRESERVEASPECTRATIO_XMIDYMAX) |
| transform.translate(-logicX - (logicWidth - physWidth * logicHeight / physHeight) / 2, -logicY); |
| else |
| transform.translate(-logicX - (logicWidth - physWidth * logicHeight / physHeight), -logicY); |
| |
| return transform; |
| } |
| |
| transform.scaleNonUniform(physWidth / logicWidth, physWidth / logicWidth); |
| |
| if (m_align == SVG_PRESERVEASPECTRATIO_XMINYMIN || m_align == SVG_PRESERVEASPECTRATIO_XMIDYMIN || m_align == SVG_PRESERVEASPECTRATIO_XMAXYMIN) |
| transform.translate(-logicX, -logicY); |
| else if (m_align == SVG_PRESERVEASPECTRATIO_XMINYMID || m_align == SVG_PRESERVEASPECTRATIO_XMIDYMID || m_align == SVG_PRESERVEASPECTRATIO_XMAXYMID) |
| transform.translate(-logicX, -logicY - (logicHeight - physHeight * logicWidth / physWidth) / 2); |
| else |
| transform.translate(-logicX, -logicY - (logicHeight - physHeight * logicWidth / physWidth)); |
| |
| return transform; |
| } |
| |
| String SVGPreserveAspectRatio::valueAsString() const |
| { |
| String alignType; |
| |
| switch (m_align) { |
| case SVG_PRESERVEASPECTRATIO_NONE: |
| alignType = "none"; |
| break; |
| case SVG_PRESERVEASPECTRATIO_XMINYMIN: |
| alignType = "xMinYMin"; |
| break; |
| case SVG_PRESERVEASPECTRATIO_XMIDYMIN: |
| alignType = "xMidYMin"; |
| break; |
| case SVG_PRESERVEASPECTRATIO_XMAXYMIN: |
| alignType = "xMaxYMin"; |
| break; |
| case SVG_PRESERVEASPECTRATIO_XMINYMID: |
| alignType = "xMinYMid"; |
| break; |
| case SVG_PRESERVEASPECTRATIO_XMIDYMID: |
| alignType = "xMidYMid"; |
| break; |
| case SVG_PRESERVEASPECTRATIO_XMAXYMID: |
| alignType = "xMaxYMid"; |
| break; |
| case SVG_PRESERVEASPECTRATIO_XMINYMAX: |
| alignType = "xMinYMax"; |
| break; |
| case SVG_PRESERVEASPECTRATIO_XMIDYMAX: |
| alignType = "xMidYMax"; |
| break; |
| case SVG_PRESERVEASPECTRATIO_XMAXYMAX: |
| alignType = "xMaxYMax"; |
| break; |
| case SVG_PRESERVEASPECTRATIO_UNKNOWN: |
| alignType = "unknown"; |
| break; |
| }; |
| |
| switch (m_meetOrSlice) { |
| default: |
| case SVG_MEETORSLICE_UNKNOWN: |
| return alignType; |
| case SVG_MEETORSLICE_MEET: |
| return makeString(alignType, " meet"); |
| case SVG_MEETORSLICE_SLICE: |
| return makeString(alignType, " slice"); |
| }; |
| } |
| |
| } |
| |
| #endif // ENABLE(SVG) |
