diff options
Diffstat (limited to 'src/gui/painting/qtransform.cpp')
| -rw-r--r-- | src/gui/painting/qtransform.cpp | 60 |
1 files changed, 38 insertions, 22 deletions
diff --git a/src/gui/painting/qtransform.cpp b/src/gui/painting/qtransform.cpp index 4bc20f6..f0b2351 100644 --- a/src/gui/painting/qtransform.cpp +++ b/src/gui/painting/qtransform.cpp @@ -1,7 +1,7 @@ /**************************************************************************** ** ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). -** Contact: Qt Software Information (qt-info@nokia.com) +** Contact: Nokia Corporation (qt-info@nokia.com) ** ** This file is part of the QtGui module of the Qt Toolkit. ** @@ -34,7 +34,7 @@ ** met: http://www.gnu.org/copyleft/gpl.html. ** ** If you are unsure which license is appropriate for your use, please -** contact the sales department at qt-sales@nokia.com. +** contact the sales department at http://www.qtsoftware.com/contact. ** $QT_END_LICENSE$ ** ****************************************************************************/ @@ -76,7 +76,9 @@ QT_BEGIN_NAMESPACE nx = affine._m11 * FX_ + affine._m21 * FY_ + affine._dx; \ ny = affine._m12 * FX_ + affine._m22 * FY_ + affine._dy; \ if (t == TxProject) { \ - qreal w = 1./(m_13 * FX_ + m_23 * FY_ + m_33); \ + qreal w = (m_13 * FX_ + m_23 * FY_ + m_33); \ + if (w < Q_NEAR_CLIP) w = Q_NEAR_CLIP; \ + w = 1./w; \ nx *= w; \ ny *= w; \ } \ @@ -230,6 +232,11 @@ QT_BEGIN_NAMESPACE */ /*! + \fn QTransform::QTransform(Qt::Initialization) + \internal +*/ + +/*! Constructs an identity matrix. All elements are set to zero except \c m11 and \c m22 (specifying @@ -436,9 +443,10 @@ QTransform QTransform::fromTranslate(qreal dx, qreal dy) { QTransform transform(1, 0, 0, 0, 1, 0, dx, dy, 1, true); if (dx == 0 && dy == 0) - transform.m_dirty = TxNone; + transform.m_type = TxNone; else - transform.m_dirty = TxTranslate; + transform.m_type = TxTranslate; + transform.m_dirty = TxNone; return transform; } @@ -489,9 +497,10 @@ QTransform QTransform::fromScale(qreal sx, qreal sy) { QTransform transform(sx, 0, 0, 0, sy, 0, 0, 0, 1, true); if (sx == 1. && sy == 1.) - transform.m_dirty = TxNone; + transform.m_type = TxNone; else - transform.m_dirty = TxScale; + transform.m_type = TxScale; + transform.m_dirty = TxNone; return transform; } @@ -708,11 +717,15 @@ QTransform & QTransform::rotateRadians(qreal a, Qt::Axis axis) */ bool QTransform::operator==(const QTransform &o) const { -#define qFZ qFuzzyCompare - return qFZ(affine._m11, o.affine._m11) && qFZ(affine._m12, o.affine._m12) && qFZ(m_13, o.m_13) - && qFZ(affine._m21, o.affine._m21) && qFZ(affine._m22, o.affine._m22) && qFZ(m_23, o.m_23) - && qFZ(affine._dx, o.affine._dx) && qFZ(affine._dy, o.affine._dy) && qFZ(m_33, o.m_33); -#undef qFZ + return affine._m11 == o.affine._m11 && + affine._m12 == o.affine._m12 && + affine._m21 == o.affine._m21 && + affine._m22 == o.affine._m22 && + affine._dx == o.affine._dx && + affine._dy == o.affine._dy && + m_13 == o.m_13 && + m_23 == o.m_23 && + m_33 == o.m_33; } /*! @@ -1796,7 +1809,7 @@ QRect QTransform::mapRect(const QRect &rect) const y -= h; } return QRect(x, y, w, h); - } else if (t < TxProject) { + } else { // see mapToPolygon for explanations of the algorithm. qreal x = 0, y = 0; MAP(rect.left(), rect.top(), x, y); @@ -1820,10 +1833,6 @@ QRect QTransform::mapRect(const QRect &rect) const xmax = qMax(xmax, x); ymax = qMax(ymax, y); return QRect(qRound(xmin), qRound(ymin), qRound(xmax)-qRound(xmin), qRound(ymax)-qRound(ymin)); - } else { - QPainterPath path; - path.addRect(rect); - return map(path).boundingRect().toRect(); } } @@ -1866,7 +1875,7 @@ QRectF QTransform::mapRect(const QRectF &rect) const y -= h; } return QRectF(x, y, w, h); - } else if (t < TxProject) { + } else { qreal x = 0, y = 0; MAP(rect.x(), rect.y(), x, y); qreal xmin = x; @@ -1889,10 +1898,6 @@ QRectF QTransform::mapRect(const QRectF &rect) const xmax = qMax(xmax, x); ymax = qMax(ymax, y); return QRectF(xmin, ymin, xmax-xmin, ymax - ymin); - } else { - QPainterPath path; - path.addRect(rect); - return map(path).boundingRect(); } } @@ -2178,6 +2183,17 @@ QTransform::operator QVariant() const \sa reset() */ +/*! + \fn bool qFuzzyCompare(const QTransform& t1, const QTransform& t2) + + \relates QTransform + \since 4.6 + + Returns true if \a t1 and \a t2 are equal, allowing for a small + fuzziness factor for floating-point comparisons; false otherwise. +*/ + + // returns true if the transform is uniformly scaling // (same scale in x and y direction) // scale is set to the max of x and y scaling factors |