diff options
Diffstat (limited to 'src/svg/qsvggraphics.cpp')
| -rw-r--r-- | src/svg/qsvggraphics.cpp | 17 |
1 files changed, 16 insertions, 1 deletions
diff --git a/src/svg/qsvggraphics.cpp b/src/svg/qsvggraphics.cpp index bcd2452..20a03ff 100644 --- a/src/svg/qsvggraphics.cpp +++ b/src/svg/qsvggraphics.cpp @@ -43,6 +43,7 @@ #include <qabstracttextdocumentlayout.h> #include <qdebug.h> +#include <qloggingcategory.h> #include <qpainter.h> #include <qscopedvaluerollback.h> #include <qtextcursor.h> @@ -53,6 +54,8 @@ QT_BEGIN_NAMESPACE +Q_LOGGING_CATEGORY(lcSvgDraw, "qt.svg.draw") + #define QT_SVG_DRAW_SHAPE(command) \ qreal oldOpacity = p->opacity(); \ QBrush oldBrush = p->brush(); \ @@ -469,15 +472,27 @@ void QSvgUse::draw(QPainter *p, QSvgExtraStates &states) if (Q_UNLIKELY(!m_link || isDescendantOf(m_link) || m_recursing)) return; + Q_ASSERT(states.nestedUseCount == 0 || states.nestedUseLevel > 0); + if (states.nestedUseLevel > 3 && states.nestedUseCount > (256 + states.nestedUseLevel * 2)) { + qCDebug(lcSvgDraw, "Too many nested use nodes at #%s!", qPrintable(m_linkId)); + return; + } + applyStyle(p, states); if (!m_start.isNull()) { p->translate(m_start); } + if (states.nestedUseLevel > 0) + ++states.nestedUseCount; { - QScopedValueRollback<bool> guard(m_recursing, true); + QScopedValueRollback<int> useLevelGuard(states.nestedUseLevel, states.nestedUseLevel + 1); + QScopedValueRollback<bool> recursingGuard(m_recursing, true); m_link->draw(p, states); } + if (states.nestedUseLevel == 0) + states.nestedUseCount = 0; + if (!m_start.isNull()) { p->translate(-m_start); } |