| /* |
| * 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" |
| #include "SVGPreserveAspectRatioValue.h" |
| |
| #include "AffineTransform.h" |
| #include "FloatRect.h" |
| #include "SVGParserUtilities.h" |
| #include <wtf/text/StringConcatenateNumbers.h> |
| #include <wtf/text/StringParsingBuffer.h> |
| #include <wtf/text/StringView.h> |
| |
| namespace WebCore { |
| |
| SVGPreserveAspectRatioValue::SVGPreserveAspectRatioValue(StringView value) |
| { |
| parse(value); |
| } |
| |
| SVGPreserveAspectRatioValue::SVGPreserveAspectRatioValue(SVGPreserveAspectRatioType align, SVGMeetOrSliceType meetOrSlice) |
| : m_align(align) |
| , m_meetOrSlice(meetOrSlice) |
| { |
| } |
| |
| ExceptionOr<void> SVGPreserveAspectRatioValue::setAlign(unsigned short align) |
| { |
| if (align == SVG_PRESERVEASPECTRATIO_UNKNOWN || align > SVG_PRESERVEASPECTRATIO_XMAXYMAX) |
| return Exception { NotSupportedError }; |
| |
| m_align = static_cast<SVGPreserveAspectRatioType>(align); |
| return { }; |
| } |
| |
| ExceptionOr<void> SVGPreserveAspectRatioValue::setMeetOrSlice(unsigned short meetOrSlice) |
| { |
| if (meetOrSlice == SVG_MEETORSLICE_UNKNOWN || meetOrSlice > SVG_MEETORSLICE_SLICE) |
| return Exception { NotSupportedError }; |
| |
| m_meetOrSlice = static_cast<SVGMeetOrSliceType>(meetOrSlice); |
| return { }; |
| } |
| |
| bool SVGPreserveAspectRatioValue::parse(StringView value) |
| { |
| return readCharactersForParsing(value, [&](auto buffer) { |
| return parseInternal(buffer, true); |
| }); |
| } |
| |
| bool SVGPreserveAspectRatioValue::parse(StringParsingBuffer<LChar>& buffer, bool validate) |
| { |
| return parseInternal(buffer, validate); |
| } |
| |
| bool SVGPreserveAspectRatioValue::parse(StringParsingBuffer<UChar>& buffer, bool validate) |
| { |
| return parseInternal(buffer, validate); |
| } |
| |
| template<typename CharacterType> static constexpr CharacterType deferDesc[] = {'d', 'e', 'f', 'e', 'r'}; |
| template<typename CharacterType> static constexpr CharacterType noneDesc[] = {'n', 'o', 'n', 'e'}; |
| template<typename CharacterType> static constexpr CharacterType meetDesc[] = {'m', 'e', 'e', 't'}; |
| template<typename CharacterType> static constexpr CharacterType sliceDesc[] = {'s', 'l', 'i', 'c', 'e'}; |
| |
| template<typename CharacterType> bool SVGPreserveAspectRatioValue::parseInternal(StringParsingBuffer<CharacterType>& buffer, bool validate) |
| { |
| SVGPreserveAspectRatioType align = SVG_PRESERVEASPECTRATIO_XMIDYMID; |
| SVGMeetOrSliceType meetOrSlice = SVG_MEETORSLICE_MEET; |
| |
| m_align = align; |
| m_meetOrSlice = meetOrSlice; |
| |
| if (!skipOptionalSVGSpaces(buffer)) |
| return false; |
| |
| if (*buffer == 'd') { |
| if (!skipCharactersExactly(buffer, deferDesc<CharacterType>)) { |
| LOG_ERROR("Skipped to parse except for *defer* value."); |
| return false; |
| } |
| |
| // FIXME: We just ignore the "defer" here. |
| if (buffer.atEnd()) |
| return true; |
| |
| if (!skipOptionalSVGSpaces(buffer)) |
| return false; |
| } |
| |
| if (*buffer == 'n') { |
| if (!skipCharactersExactly(buffer, noneDesc<CharacterType>)) { |
| LOG_ERROR("Skipped to parse except for *none* value."); |
| return false; |
| } |
| align = SVG_PRESERVEASPECTRATIO_NONE; |
| skipOptionalSVGSpaces(buffer); |
| } else if (*buffer == 'x') { |
| if (buffer.lengthRemaining() < 8) |
| return false; |
| if (buffer[1] != 'M' || buffer[4] != 'Y' || buffer[5] != 'M') |
| return false; |
| if (buffer[2] == 'i') { |
| if (buffer[3] == 'n') { |
| if (buffer[6] == 'i') { |
| if (buffer[7] == 'n') |
| align = SVG_PRESERVEASPECTRATIO_XMINYMIN; |
| else if (buffer[7] == 'd') |
| align = SVG_PRESERVEASPECTRATIO_XMINYMID; |
| else |
| return false; |
| } else if (buffer[6] == 'a' && buffer[7] == 'x') |
| align = SVG_PRESERVEASPECTRATIO_XMINYMAX; |
| else |
| return false; |
| } else if (buffer[3] == 'd') { |
| if (buffer[6] == 'i') { |
| if (buffer[7] == 'n') |
| align = SVG_PRESERVEASPECTRATIO_XMIDYMIN; |
| else if (buffer[7] == 'd') |
| align = SVG_PRESERVEASPECTRATIO_XMIDYMID; |
| else |
| return false; |
| } else if (buffer[6] == 'a' && buffer[7] == 'x') |
| align = SVG_PRESERVEASPECTRATIO_XMIDYMAX; |
| else |
| return false; |
| } else |
| return false; |
| } else if (buffer[2] == 'a' && buffer[3] == 'x') { |
| if (buffer[6] == 'i') { |
| if (buffer[7] == 'n') |
| align = SVG_PRESERVEASPECTRATIO_XMAXYMIN; |
| else if (buffer[7] == 'd') |
| align = SVG_PRESERVEASPECTRATIO_XMAXYMID; |
| else |
| return false; |
| } else if (buffer[6] == 'a' && buffer[7] == 'x') |
| align = SVG_PRESERVEASPECTRATIO_XMAXYMAX; |
| else |
| return false; |
| } else |
| return false; |
| buffer += 8; |
| skipOptionalSVGSpaces(buffer); |
| } else |
| return false; |
| |
| if (buffer.hasCharactersRemaining()) { |
| if (*buffer == 'm') { |
| if (!skipCharactersExactly(buffer, meetDesc<CharacterType>)) { |
| LOG_ERROR("Skipped to parse except for *meet* or *slice* value."); |
| return false; |
| } |
| skipOptionalSVGSpaces(buffer); |
| } else if (*buffer == 's') { |
| if (!skipCharactersExactly(buffer, sliceDesc<CharacterType>)) { |
| LOG_ERROR("Skipped to parse except for *meet* or *slice* value."); |
| return false; |
| } |
| skipOptionalSVGSpaces(buffer); |
| if (align != SVG_PRESERVEASPECTRATIO_NONE) |
| meetOrSlice = SVG_MEETORSLICE_SLICE; |
| } |
| } |
| |
| if (!buffer.atEnd() && validate) |
| return false; |
| |
| m_align = align; |
| m_meetOrSlice = meetOrSlice; |
| |
| return true; |
| } |
| |
| void SVGPreserveAspectRatioValue::transformRect(FloatRect& destRect, FloatRect& srcRect) const |
| { |
| if (m_align == SVG_PRESERVEASPECTRATIO_NONE) |
| return; |
| |
| FloatSize imageSize = srcRect.size(); |
| float origDestWidth = destRect.width(); |
| float origDestHeight = destRect.height(); |
| switch (m_meetOrSlice) { |
| case SVGPreserveAspectRatioValue::SVG_MEETORSLICE_UNKNOWN: |
| break; |
| case SVGPreserveAspectRatioValue::SVG_MEETORSLICE_MEET: { |
| float widthToHeightMultiplier = srcRect.height() / srcRect.width(); |
| if (origDestHeight > origDestWidth * widthToHeightMultiplier) { |
| destRect.setHeight(origDestWidth * widthToHeightMultiplier); |
| switch (m_align) { |
| case SVGPreserveAspectRatioValue::SVG_PRESERVEASPECTRATIO_XMINYMID: |
| case SVGPreserveAspectRatioValue::SVG_PRESERVEASPECTRATIO_XMIDYMID: |
| case SVGPreserveAspectRatioValue::SVG_PRESERVEASPECTRATIO_XMAXYMID: |
| destRect.setY(destRect.y() + origDestHeight / 2 - destRect.height() / 2); |
| break; |
| case SVGPreserveAspectRatioValue::SVG_PRESERVEASPECTRATIO_XMINYMAX: |
| case SVGPreserveAspectRatioValue::SVG_PRESERVEASPECTRATIO_XMIDYMAX: |
| case SVGPreserveAspectRatioValue::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 SVGPreserveAspectRatioValue::SVG_PRESERVEASPECTRATIO_XMIDYMIN: |
| case SVGPreserveAspectRatioValue::SVG_PRESERVEASPECTRATIO_XMIDYMID: |
| case SVGPreserveAspectRatioValue::SVG_PRESERVEASPECTRATIO_XMIDYMAX: |
| destRect.setX(destRect.x() + origDestWidth / 2 - destRect.width() / 2); |
| break; |
| case SVGPreserveAspectRatioValue::SVG_PRESERVEASPECTRATIO_XMAXYMIN: |
| case SVGPreserveAspectRatioValue::SVG_PRESERVEASPECTRATIO_XMAXYMID: |
| case SVGPreserveAspectRatioValue::SVG_PRESERVEASPECTRATIO_XMAXYMAX: |
| destRect.setX(destRect.x() + origDestWidth - destRect.width()); |
| break; |
| default: |
| break; |
| } |
| } |
| break; |
| } |
| case SVGPreserveAspectRatioValue::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 SVGPreserveAspectRatioValue::SVG_PRESERVEASPECTRATIO_XMINYMID: |
| case SVGPreserveAspectRatioValue::SVG_PRESERVEASPECTRATIO_XMIDYMID: |
| case SVGPreserveAspectRatioValue::SVG_PRESERVEASPECTRATIO_XMAXYMID: |
| srcRect.setY(srcRect.y() + imageSize.height() / 2 - srcRect.height() / 2); |
| break; |
| case SVGPreserveAspectRatioValue::SVG_PRESERVEASPECTRATIO_XMINYMAX: |
| case SVGPreserveAspectRatioValue::SVG_PRESERVEASPECTRATIO_XMIDYMAX: |
| case SVGPreserveAspectRatioValue::SVG_PRESERVEASPECTRATIO_XMAXYMAX: |
| srcRect.setY(srcRect.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 SVGPreserveAspectRatioValue::SVG_PRESERVEASPECTRATIO_XMIDYMIN: |
| case SVGPreserveAspectRatioValue::SVG_PRESERVEASPECTRATIO_XMIDYMID: |
| case SVGPreserveAspectRatioValue::SVG_PRESERVEASPECTRATIO_XMIDYMAX: |
| srcRect.setX(srcRect.x() + imageSize.width() / 2 - srcRect.width() / 2); |
| break; |
| case SVGPreserveAspectRatioValue::SVG_PRESERVEASPECTRATIO_XMAXYMIN: |
| case SVGPreserveAspectRatioValue::SVG_PRESERVEASPECTRATIO_XMAXYMID: |
| case SVGPreserveAspectRatioValue::SVG_PRESERVEASPECTRATIO_XMAXYMAX: |
| srcRect.setX(srcRect.x() + imageSize.width() - srcRect.width()); |
| break; |
| default: |
| break; |
| } |
| } |
| break; |
| } |
| } |
| } |
| |
| AffineTransform SVGPreserveAspectRatioValue::getCTM(float logicalX, float logicalY, float logicalWidth, float logicalHeight, float physicalWidth, float physicalHeight) const |
| { |
| AffineTransform transform; |
| if (!logicalWidth || !logicalHeight || !physicalWidth || !physicalHeight) { |
| ASSERT_NOT_REACHED(); |
| return transform; |
| } |
| |
| if (m_align == SVG_PRESERVEASPECTRATIO_UNKNOWN) |
| return transform; |
| |
| double extendedLogicalX = logicalX; |
| double extendedLogicalY = logicalY; |
| double extendedLogicalWidth = logicalWidth; |
| double extendedLogicalHeight = logicalHeight; |
| double extendedPhysicalWidth = physicalWidth; |
| double extendedPhysicalHeight = physicalHeight; |
| double logicalRatio = extendedLogicalWidth / extendedLogicalHeight; |
| double physicalRatio = extendedPhysicalWidth / extendedPhysicalHeight; |
| |
| if (m_align == SVG_PRESERVEASPECTRATIO_NONE) { |
| transform.scaleNonUniform(extendedPhysicalWidth / extendedLogicalWidth, extendedPhysicalHeight / extendedLogicalHeight); |
| transform.translate(-extendedLogicalX, -extendedLogicalY); |
| return transform; |
| } |
| |
| if ((logicalRatio < physicalRatio && (m_meetOrSlice == SVG_MEETORSLICE_MEET)) || (logicalRatio >= physicalRatio && (m_meetOrSlice == SVG_MEETORSLICE_SLICE))) { |
| transform.scaleNonUniform(extendedPhysicalHeight / extendedLogicalHeight, extendedPhysicalHeight / extendedLogicalHeight); |
| |
| if (m_align == SVG_PRESERVEASPECTRATIO_XMINYMIN || m_align == SVG_PRESERVEASPECTRATIO_XMINYMID || m_align == SVG_PRESERVEASPECTRATIO_XMINYMAX) |
| transform.translate(-extendedLogicalX, -extendedLogicalY); |
| else if (m_align == SVG_PRESERVEASPECTRATIO_XMIDYMIN || m_align == SVG_PRESERVEASPECTRATIO_XMIDYMID || m_align == SVG_PRESERVEASPECTRATIO_XMIDYMAX) |
| transform.translate(-extendedLogicalX - (extendedLogicalWidth - extendedPhysicalWidth * extendedLogicalHeight / extendedPhysicalHeight) / 2, -extendedLogicalY); |
| else |
| transform.translate(-extendedLogicalX - (extendedLogicalWidth - extendedPhysicalWidth * extendedLogicalHeight / extendedPhysicalHeight), -extendedLogicalY); |
| |
| return transform; |
| } |
| |
| transform.scaleNonUniform(extendedPhysicalWidth / extendedLogicalWidth, extendedPhysicalWidth / extendedLogicalWidth); |
| |
| if (m_align == SVG_PRESERVEASPECTRATIO_XMINYMIN || m_align == SVG_PRESERVEASPECTRATIO_XMIDYMIN || m_align == SVG_PRESERVEASPECTRATIO_XMAXYMIN) |
| transform.translate(-extendedLogicalX, -extendedLogicalY); |
| else if (m_align == SVG_PRESERVEASPECTRATIO_XMINYMID || m_align == SVG_PRESERVEASPECTRATIO_XMIDYMID || m_align == SVG_PRESERVEASPECTRATIO_XMAXYMID) |
| transform.translate(-extendedLogicalX, -extendedLogicalY - (extendedLogicalHeight - extendedPhysicalHeight * extendedLogicalWidth / extendedPhysicalWidth) / 2); |
| else |
| transform.translate(-extendedLogicalX, -extendedLogicalY - (extendedLogicalHeight - extendedPhysicalHeight * extendedLogicalWidth / extendedPhysicalWidth)); |
| |
| return transform; |
| } |
| |
| String SVGPreserveAspectRatioValue::valueAsString() const |
| { |
| auto alignType = [&]() { |
| switch (m_align) { |
| case SVG_PRESERVEASPECTRATIO_NONE: |
| return "none"_s; |
| case SVG_PRESERVEASPECTRATIO_XMINYMIN: |
| return "xMinYMin"_s; |
| case SVG_PRESERVEASPECTRATIO_XMIDYMIN: |
| return "xMidYMin"_s; |
| case SVG_PRESERVEASPECTRATIO_XMAXYMIN: |
| return "xMaxYMin"_s; |
| case SVG_PRESERVEASPECTRATIO_XMINYMID: |
| return "xMinYMid"_s; |
| case SVG_PRESERVEASPECTRATIO_XMIDYMID: |
| return "xMidYMid"_s; |
| case SVG_PRESERVEASPECTRATIO_XMAXYMID: |
| return "xMaxYMid"_s; |
| case SVG_PRESERVEASPECTRATIO_XMINYMAX: |
| return "xMinYMax"_s; |
| case SVG_PRESERVEASPECTRATIO_XMIDYMAX: |
| return "xMidYMax"_s; |
| case SVG_PRESERVEASPECTRATIO_XMAXYMAX: |
| return "xMaxYMax"_s; |
| case SVG_PRESERVEASPECTRATIO_UNKNOWN: |
| return "unknown"_s; |
| }; |
| |
| ASSERT_NOT_REACHED(); |
| return "unknown"_s; |
| }; |
| |
| 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"); |
| } |
| } |
| |
| } |
