| /* |
| * 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 "core/svg/SVGPreserveAspectRatio.h" |
| |
| #include "core/svg/SVGAnimationElement.h" |
| #include "core/svg/SVGParserUtilities.h" |
| #include "platform/geometry/FloatRect.h" |
| #include "platform/transforms/AffineTransform.h" |
| #include "wtf/text/ParsingUtilities.h" |
| #include "wtf/text/WTFString.h" |
| |
| namespace blink { |
| |
| SVGPreserveAspectRatio::SVGPreserveAspectRatio() { |
| setDefault(); |
| } |
| |
| void SVGPreserveAspectRatio::setDefault() { |
| m_align = kSvgPreserveaspectratioXmidymid; |
| m_meetOrSlice = kSvgMeetorsliceMeet; |
| } |
| |
| SVGPreserveAspectRatio* SVGPreserveAspectRatio::clone() const { |
| SVGPreserveAspectRatio* preserveAspectRatio = create(); |
| |
| preserveAspectRatio->m_align = m_align; |
| preserveAspectRatio->m_meetOrSlice = m_meetOrSlice; |
| |
| return preserveAspectRatio; |
| } |
| |
| template <typename CharType> |
| SVGParsingError SVGPreserveAspectRatio::parseInternal(const CharType*& ptr, |
| const CharType* end, |
| bool validate) { |
| SVGPreserveAspectRatioType align = kSvgPreserveaspectratioXmidymid; |
| SVGMeetOrSliceType meetOrSlice = kSvgMeetorsliceMeet; |
| |
| setAlign(align); |
| setMeetOrSlice(meetOrSlice); |
| |
| const CharType* start = ptr; |
| if (!skipOptionalSVGSpaces(ptr, end)) |
| return SVGParsingError(SVGParseStatus::ExpectedEnumeration, ptr - start); |
| |
| if (*ptr == 'n') { |
| if (!skipToken(ptr, end, "none")) |
| return SVGParsingError(SVGParseStatus::ExpectedEnumeration, ptr - start); |
| align = kSvgPreserveaspectratioNone; |
| skipOptionalSVGSpaces(ptr, end); |
| } else if (*ptr == 'x') { |
| if ((end - ptr) < 8) |
| return SVGParsingError(SVGParseStatus::ExpectedEnumeration, ptr - start); |
| if (ptr[1] != 'M' || ptr[4] != 'Y' || ptr[5] != 'M') |
| return SVGParsingError(SVGParseStatus::ExpectedEnumeration, ptr - start); |
| if (ptr[2] == 'i') { |
| if (ptr[3] == 'n') { |
| if (ptr[6] == 'i') { |
| if (ptr[7] == 'n') |
| align = kSvgPreserveaspectratioXminymin; |
| else if (ptr[7] == 'd') |
| align = kSvgPreserveaspectratioXminymid; |
| else |
| return SVGParsingError(SVGParseStatus::ExpectedEnumeration, |
| ptr - start); |
| } else if (ptr[6] == 'a' && ptr[7] == 'x') { |
| align = kSvgPreserveaspectratioXminymax; |
| } else { |
| return SVGParsingError(SVGParseStatus::ExpectedEnumeration, |
| ptr - start); |
| } |
| } else if (ptr[3] == 'd') { |
| if (ptr[6] == 'i') { |
| if (ptr[7] == 'n') |
| align = kSvgPreserveaspectratioXmidymin; |
| else if (ptr[7] == 'd') |
| align = kSvgPreserveaspectratioXmidymid; |
| else |
| return SVGParsingError(SVGParseStatus::ExpectedEnumeration, |
| ptr - start); |
| } else if (ptr[6] == 'a' && ptr[7] == 'x') { |
| align = kSvgPreserveaspectratioXmidymax; |
| } else { |
| return SVGParsingError(SVGParseStatus::ExpectedEnumeration, |
| ptr - start); |
| } |
| } else { |
| return SVGParsingError(SVGParseStatus::ExpectedEnumeration, |
| ptr - start); |
| } |
| } else if (ptr[2] == 'a' && ptr[3] == 'x') { |
| if (ptr[6] == 'i') { |
| if (ptr[7] == 'n') |
| align = kSvgPreserveaspectratioXmaxymin; |
| else if (ptr[7] == 'd') |
| align = kSvgPreserveaspectratioXmaxymid; |
| else |
| return SVGParsingError(SVGParseStatus::ExpectedEnumeration, |
| ptr - start); |
| } else if (ptr[6] == 'a' && ptr[7] == 'x') { |
| align = kSvgPreserveaspectratioXmaxymax; |
| } else { |
| return SVGParsingError(SVGParseStatus::ExpectedEnumeration, |
| ptr - start); |
| } |
| } else { |
| return SVGParsingError(SVGParseStatus::ExpectedEnumeration, ptr - start); |
| } |
| ptr += 8; |
| skipOptionalSVGSpaces(ptr, end); |
| } else { |
| return SVGParsingError(SVGParseStatus::ExpectedEnumeration, ptr - start); |
| } |
| |
| if (ptr < end) { |
| if (*ptr == 'm') { |
| if (!skipToken(ptr, end, "meet")) |
| return SVGParsingError(SVGParseStatus::ExpectedEnumeration, |
| ptr - start); |
| skipOptionalSVGSpaces(ptr, end); |
| } else if (*ptr == 's') { |
| if (!skipToken(ptr, end, "slice")) |
| return SVGParsingError(SVGParseStatus::ExpectedEnumeration, |
| ptr - start); |
| skipOptionalSVGSpaces(ptr, end); |
| if (align != kSvgPreserveaspectratioNone) |
| meetOrSlice = kSvgMeetorsliceSlice; |
| } |
| } |
| |
| if (end != ptr && validate) |
| return SVGParsingError(SVGParseStatus::TrailingGarbage, ptr - start); |
| |
| setAlign(align); |
| setMeetOrSlice(meetOrSlice); |
| |
| return SVGParseStatus::NoError; |
| } |
| |
| SVGParsingError SVGPreserveAspectRatio::setValueAsString(const String& string) { |
| setDefault(); |
| |
| if (string.isEmpty()) |
| return SVGParseStatus::NoError; |
| |
| if (string.is8Bit()) { |
| const LChar* ptr = string.characters8(); |
| const LChar* end = ptr + string.length(); |
| return parseInternal(ptr, end, true); |
| } |
| const UChar* ptr = string.characters16(); |
| const UChar* end = ptr + string.length(); |
| return parseInternal(ptr, end, true); |
| } |
| |
| bool SVGPreserveAspectRatio::parse(const LChar*& ptr, |
| const LChar* end, |
| bool validate) { |
| return parseInternal(ptr, end, validate) == SVGParseStatus::NoError; |
| } |
| |
| bool SVGPreserveAspectRatio::parse(const UChar*& ptr, |
| const UChar* end, |
| bool validate) { |
| return parseInternal(ptr, end, validate) == SVGParseStatus::NoError; |
| } |
| |
| void SVGPreserveAspectRatio::transformRect(FloatRect& destRect, |
| FloatRect& srcRect) { |
| if (m_align == kSvgPreserveaspectratioNone) |
| return; |
| |
| FloatSize imageSize = srcRect.size(); |
| float origDestWidth = destRect.width(); |
| float origDestHeight = destRect.height(); |
| switch (m_meetOrSlice) { |
| case SVGPreserveAspectRatio::kSvgMeetorsliceUnknown: |
| break; |
| case SVGPreserveAspectRatio::kSvgMeetorsliceMeet: { |
| float widthToHeightMultiplier = srcRect.height() / srcRect.width(); |
| if (origDestHeight > origDestWidth * widthToHeightMultiplier) { |
| destRect.setHeight(origDestWidth * widthToHeightMultiplier); |
| switch (m_align) { |
| case SVGPreserveAspectRatio::kSvgPreserveaspectratioXminymid: |
| case SVGPreserveAspectRatio::kSvgPreserveaspectratioXmidymid: |
| case SVGPreserveAspectRatio::kSvgPreserveaspectratioXmaxymid: |
| destRect.setY(destRect.y() + origDestHeight / 2 - |
| destRect.height() / 2); |
| break; |
| case SVGPreserveAspectRatio::kSvgPreserveaspectratioXminymax: |
| case SVGPreserveAspectRatio::kSvgPreserveaspectratioXmidymax: |
| case SVGPreserveAspectRatio::kSvgPreserveaspectratioXmaxymax: |
| destRect.setY(destRect.y() + origDestHeight - destRect.height()); |
| break; |
| default: |
| break; |
| } |
| } |
| if (origDestWidth > origDestHeight / widthToHeightMultiplier) { |
| destRect.setWidth(origDestHeight / widthToHeightMultiplier); |
| switch (m_align) { |
| case SVGPreserveAspectRatio::kSvgPreserveaspectratioXmidymin: |
| case SVGPreserveAspectRatio::kSvgPreserveaspectratioXmidymid: |
| case SVGPreserveAspectRatio::kSvgPreserveaspectratioXmidymax: |
| destRect.setX(destRect.x() + origDestWidth / 2 - |
| destRect.width() / 2); |
| break; |
| case SVGPreserveAspectRatio::kSvgPreserveaspectratioXmaxymin: |
| case SVGPreserveAspectRatio::kSvgPreserveaspectratioXmaxymid: |
| case SVGPreserveAspectRatio::kSvgPreserveaspectratioXmaxymax: |
| destRect.setX(destRect.x() + origDestWidth - destRect.width()); |
| break; |
| default: |
| break; |
| } |
| } |
| break; |
| } |
| case SVGPreserveAspectRatio::kSvgMeetorsliceSlice: { |
| 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::kSvgPreserveaspectratioXminymid: |
| case SVGPreserveAspectRatio::kSvgPreserveaspectratioXmidymid: |
| case SVGPreserveAspectRatio::kSvgPreserveaspectratioXmaxymid: |
| srcRect.setY(srcRect.y() + imageSize.height() / 2 - |
| srcRect.height() / 2); |
| break; |
| case SVGPreserveAspectRatio::kSvgPreserveaspectratioXminymax: |
| case SVGPreserveAspectRatio::kSvgPreserveaspectratioXmidymax: |
| case SVGPreserveAspectRatio::kSvgPreserveaspectratioXmaxymax: |
| 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 SVGPreserveAspectRatio::kSvgPreserveaspectratioXmidymin: |
| case SVGPreserveAspectRatio::kSvgPreserveaspectratioXmidymid: |
| case SVGPreserveAspectRatio::kSvgPreserveaspectratioXmidymax: |
| srcRect.setX(srcRect.x() + imageSize.width() / 2 - |
| srcRect.width() / 2); |
| break; |
| case SVGPreserveAspectRatio::kSvgPreserveaspectratioXmaxymin: |
| case SVGPreserveAspectRatio::kSvgPreserveaspectratioXmaxymid: |
| case SVGPreserveAspectRatio::kSvgPreserveaspectratioXmaxymax: |
| srcRect.setX(srcRect.x() + imageSize.width() - srcRect.width()); |
| break; |
| default: |
| break; |
| } |
| } |
| break; |
| } |
| } |
| } |
| |
| AffineTransform SVGPreserveAspectRatio::getCTM(float logicalX, |
| float logicalY, |
| float logicalWidth, |
| float logicalHeight, |
| float physicalWidth, |
| float physicalHeight) const { |
| ASSERT(logicalWidth); |
| ASSERT(logicalHeight); |
| ASSERT(physicalWidth); |
| ASSERT(physicalHeight); |
| |
| AffineTransform transform; |
| if (m_align == kSvgPreserveaspectratioUnknown) |
| 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 == kSvgPreserveaspectratioNone) { |
| transform.scaleNonUniform(extendedPhysicalWidth / extendedLogicalWidth, |
| extendedPhysicalHeight / extendedLogicalHeight); |
| transform.translate(-extendedLogicalX, -extendedLogicalY); |
| return transform; |
| } |
| |
| if ((logicalRatio < physicalRatio && |
| (m_meetOrSlice == kSvgMeetorsliceMeet)) || |
| (logicalRatio >= physicalRatio && |
| (m_meetOrSlice == kSvgMeetorsliceSlice))) { |
| transform.scaleNonUniform(extendedPhysicalHeight / extendedLogicalHeight, |
| extendedPhysicalHeight / extendedLogicalHeight); |
| |
| if (m_align == kSvgPreserveaspectratioXminymin || |
| m_align == kSvgPreserveaspectratioXminymid || |
| m_align == kSvgPreserveaspectratioXminymax) |
| transform.translate(-extendedLogicalX, -extendedLogicalY); |
| else if (m_align == kSvgPreserveaspectratioXmidymin || |
| m_align == kSvgPreserveaspectratioXmidymid || |
| m_align == kSvgPreserveaspectratioXmidymax) |
| 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 == kSvgPreserveaspectratioXminymin || |
| m_align == kSvgPreserveaspectratioXmidymin || |
| m_align == kSvgPreserveaspectratioXmaxymin) |
| transform.translate(-extendedLogicalX, -extendedLogicalY); |
| else if (m_align == kSvgPreserveaspectratioXminymid || |
| m_align == kSvgPreserveaspectratioXmidymid || |
| m_align == kSvgPreserveaspectratioXmaxymid) |
| transform.translate(-extendedLogicalX, |
| -extendedLogicalY - |
| (extendedLogicalHeight - |
| extendedPhysicalHeight * extendedLogicalWidth / |
| extendedPhysicalWidth) / |
| 2); |
| else |
| transform.translate( |
| -extendedLogicalX, |
| -extendedLogicalY - (extendedLogicalHeight - |
| extendedPhysicalHeight * extendedLogicalWidth / |
| extendedPhysicalWidth)); |
| |
| return transform; |
| } |
| |
| String SVGPreserveAspectRatio::valueAsString() const { |
| StringBuilder builder; |
| |
| const char* alignString = ""; |
| switch (m_align) { |
| case kSvgPreserveaspectratioNone: |
| alignString = "none"; |
| break; |
| case kSvgPreserveaspectratioXminymin: |
| alignString = "xMinYMin"; |
| break; |
| case kSvgPreserveaspectratioXmidymin: |
| alignString = "xMidYMin"; |
| break; |
| case kSvgPreserveaspectratioXmaxymin: |
| alignString = "xMaxYMin"; |
| break; |
| case kSvgPreserveaspectratioXminymid: |
| alignString = "xMinYMid"; |
| break; |
| case kSvgPreserveaspectratioXmidymid: |
| alignString = "xMidYMid"; |
| break; |
| case kSvgPreserveaspectratioXmaxymid: |
| alignString = "xMaxYMid"; |
| break; |
| case kSvgPreserveaspectratioXminymax: |
| alignString = "xMinYMax"; |
| break; |
| case kSvgPreserveaspectratioXmidymax: |
| alignString = "xMidYMax"; |
| break; |
| case kSvgPreserveaspectratioXmaxymax: |
| alignString = "xMaxYMax"; |
| break; |
| case kSvgPreserveaspectratioUnknown: |
| alignString = "unknown"; |
| break; |
| } |
| builder.append(alignString); |
| |
| const char* meetOrSliceString = ""; |
| switch (m_meetOrSlice) { |
| default: |
| case kSvgMeetorsliceUnknown: |
| break; |
| case kSvgMeetorsliceMeet: |
| meetOrSliceString = " meet"; |
| break; |
| case kSvgMeetorsliceSlice: |
| meetOrSliceString = " slice"; |
| break; |
| } |
| builder.append(meetOrSliceString); |
| return builder.toString(); |
| } |
| |
| void SVGPreserveAspectRatio::add(SVGPropertyBase* other, SVGElement*) { |
| ASSERT_NOT_REACHED(); |
| } |
| |
| void SVGPreserveAspectRatio::calculateAnimatedValue( |
| SVGAnimationElement* animationElement, |
| float percentage, |
| unsigned repeatCount, |
| SVGPropertyBase* fromValue, |
| SVGPropertyBase* toValue, |
| SVGPropertyBase*, |
| SVGElement*) { |
| ASSERT(animationElement); |
| |
| bool useToValue; |
| animationElement->animateDiscreteType(percentage, false, true, useToValue); |
| |
| SVGPreserveAspectRatio* preserveAspectRatioToUse = |
| useToValue ? toSVGPreserveAspectRatio(toValue) |
| : toSVGPreserveAspectRatio(fromValue); |
| |
| m_align = preserveAspectRatioToUse->m_align; |
| m_meetOrSlice = preserveAspectRatioToUse->m_meetOrSlice; |
| } |
| |
| float SVGPreserveAspectRatio::calculateDistance(SVGPropertyBase* toValue, |
| SVGElement* contextElement) { |
| // No paced animations for SVGPreserveAspectRatio. |
| return -1; |
| } |
| |
| } // namespace blink |
