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-rw-r--r--src/gui/painting/qregion.cpp204
1 files changed, 108 insertions, 96 deletions
diff --git a/src/gui/painting/qregion.cpp b/src/gui/painting/qregion.cpp
index 658e857..0db700a 100644
--- a/src/gui/painting/qregion.cpp
+++ b/src/gui/painting/qregion.cpp
@@ -49,7 +49,7 @@
#include <qdebug.h>
-#if defined(Q_OS_UNIX) || defined(Q_OS_WINCE)
+#if defined(Q_OS_UNIX) || defined(Q_WS_WIN)
#include "qimage.h"
#include "qbitmap.h"
#include <stdlib.h>
@@ -61,7 +61,7 @@ QT_BEGIN_NAMESPACE
\class QRegion
\brief The QRegion class specifies a clip region for a painter.
- \ingroup multimedia
+ \ingroup painting
\ingroup shared
QRegion is used with QPainter::setClipRegion() to limit the paint
@@ -92,10 +92,6 @@ QT_BEGIN_NAMESPACE
Example of using complex regions:
\snippet doc/src/snippets/code/src_gui_painting_qregion.cpp 0
- \warning Due to window system limitations, the whole coordinate space for a
- region is limited to the points between -32767 and 32767 on Windows
- 95/98/ME. You can circumvent this limitation by using a QPainterPath.
-
\section1 Additional License Information
On Embedded Linux, Windows CE and X11 platforms, parts of this class rely on
@@ -450,9 +446,9 @@ QDebug operator<<(QDebug s, const QRegion &r)
{
QVector<QRect> rects = r.rects();
s.nospace() << "QRegion(size=" << rects.size() << "), "
- << "bounds = " << r.boundingRect() << "\n";
+ << "bounds = " << r.boundingRect() << '\n';
for (int i=0; i<rects.size(); ++i)
- s << "- " << i << rects.at(i) << "\n";
+ s << "- " << i << rects.at(i) << '\n';
return s;
}
#endif
@@ -549,7 +545,7 @@ QRegion& QRegion::operator|=(const QRegion &r)
\sa intersected()
*/
-#if !defined (Q_OS_UNIX) && !defined (Q_OS_WINCE)
+#if !defined (Q_OS_UNIX) && !defined (Q_WS_WIN)
QRegion& QRegion::operator+=(const QRect &r)
{
return operator+=(QRegion(r));
@@ -565,16 +561,14 @@ QRegion& QRegion::operator+=(const QRect &r)
\sa intersected()
*/
-#if !defined(Q_WS_WIN) || defined(Q_OS_WINCE)
QRegion& QRegion::operator&=(const QRegion &r)
{ return *this = *this & r; }
-#endif
/*!
\overload
\since 4.4
*/
-#if defined (Q_OS_UNIX) || defined (Q_OS_WINCE)
+#if defined (Q_OS_UNIX) || defined (Q_WS_WIN)
QRegion& QRegion::operator&=(const QRect &r)
{
return *this = *this & r;
@@ -595,10 +589,8 @@ QRegion& QRegion::operator&=(const QRect &r)
\sa subtracted()
*/
-#if !defined(Q_WS_WIN) || defined(Q_OS_WINCE)
QRegion& QRegion::operator-=(const QRegion &r)
{ return *this = *this - r; }
-#endif
/*!
Applies the xored() function to this region and \a r and
@@ -698,6 +690,8 @@ bool QRegion::intersects(const QRegion &region) const
if (!rect_intersects(boundingRect(), region.boundingRect()))
return false;
+ if (numRects() == 1 && region.numRects() == 1)
+ return true;
const QVector<QRect> myRects = rects();
const QVector<QRect> otherRects = region.rects();
@@ -723,6 +717,8 @@ bool QRegion::intersects(const QRect &rect) const
const QRect r = rect.normalized();
if (!rect_intersects(boundingRect(), r))
return false;
+ if (numRects() == 1)
+ return true;
const QVector<QRect> myRects = rects();
for (QVector<QRect>::const_iterator it = myRects.constBegin(); it < myRects.constEnd(); ++it)
@@ -731,7 +727,7 @@ bool QRegion::intersects(const QRect &rect) const
return false;
}
-#if !defined (Q_OS_UNIX) && !defined (Q_OS_WINCE)
+#if !defined (Q_OS_UNIX) && !defined (Q_WS_WIN)
/*!
\overload
\since 4.4
@@ -1086,7 +1082,7 @@ Q_AUTOTEST_EXPORT QPainterPath qt_regionToPath(const QRegion &region)
return result;
}
-#if defined(Q_OS_UNIX) || defined(Q_OS_WINCE)
+#if defined(Q_OS_UNIX) || defined(Q_WS_WIN)
//#define QT_REGION_DEBUG
/*
@@ -1601,7 +1597,7 @@ void QRegionPrivate::selfTest() const
for (int i = 0; i < numRects; ++i) {
const QRect r = rects.at(i);
if ((r.width() * r.height()) > innerArea)
- qDebug() << "selfTest(): innerRect" << innerRect << "<" << r;
+ qDebug() << "selfTest(): innerRect" << innerRect << '<' << r;
}
QRect r = rects.first();
@@ -1627,9 +1623,9 @@ QT_END_INCLUDE_NAMESPACE
QT_BEGIN_INCLUDE_NAMESPACE
# include "qregion_mac.cpp"
QT_END_INCLUDE_NAMESPACE
-#elif defined(Q_OS_WINCE)
+#elif defined(Q_WS_WIN)
QT_BEGIN_INCLUDE_NAMESPACE
-# include "qregion_wince.cpp"
+# include "qregion_win.cpp"
QT_END_INCLUDE_NAMESPACE
#elif defined(Q_WS_QWS)
static QRegionPrivate qrp;
@@ -3167,6 +3163,7 @@ static void InsertEdgeInET(EdgeTable *ET, EdgeTableEntry *ETE, int scanline,
{
tmpSLLBlock =
(ScanLineListBlock *)malloc(sizeof(ScanLineListBlock));
+ Q_CHECK_PTR(tmpSLLBlock);
(*SLLBlock)->next = tmpSLLBlock;
tmpSLLBlock->next = (ScanLineListBlock *)NULL;
*SLLBlock = tmpSLLBlock;
@@ -3553,6 +3550,8 @@ static void PtsToRegion(register int numFullPtBlocks, register int iCurPtBlock,
* Scan converts a polygon by returning a run-length
* encoding of the resultant bitmap -- the run-length
* encoding is in the form of an array of rectangles.
+ *
+ * Can return 0 in case of errors.
*/
static QRegionPrivate *PolygonRegion(const QPoint *Pts, int Count, int rule)
//Point *Pts; /* the pts */
@@ -3624,75 +3623,28 @@ static QRegionPrivate *PolygonRegion(const QPoint *Pts, int Count, int rule)
}
- if (rule == EvenOddRule) {
- /*
- * for each scanline
- */
- for (y = ET.ymin; y < ET.ymax; ++y) {
-
- /*
- * Add a new edge to the active edge table when we
- * get to the next edge.
- */
- if (pSLL && y == pSLL->scanline) {
- loadAET(&AET, pSLL->edgelist);
- pSLL = pSLL->next;
- }
- pPrevAET = &AET;
- pAET = AET.next;
-
+ QT_TRY {
+ if (rule == EvenOddRule) {
/*
- * for each active edge
+ * for each scanline
*/
- while (pAET) {
- pts->setX(pAET->bres.minor_axis);
- pts->setY(y);
- ++pts;
- ++iPts;
+ for (y = ET.ymin; y < ET.ymax; ++y) {
/*
- * send out the buffer
+ * Add a new edge to the active edge table when we
+ * get to the next edge.
*/
- if (iPts == NUMPTSTOBUFFER) {
- tmpPtBlock = (POINTBLOCK *)malloc(sizeof(POINTBLOCK));
- tmpPtBlock->pts = reinterpret_cast<QPoint *>(tmpPtBlock->data);
- curPtBlock->next = tmpPtBlock;
- curPtBlock = tmpPtBlock;
- pts = curPtBlock->pts;
- ++numFullPtBlocks;
- iPts = 0;
+ if (pSLL && y == pSLL->scanline) {
+ loadAET(&AET, pSLL->edgelist);
+ pSLL = pSLL->next;
}
- EVALUATEEDGEEVENODD(pAET, pPrevAET, y)
- }
- InsertionSort(&AET);
- }
- } else {
- /*
- * for each scanline
- */
- for (y = ET.ymin; y < ET.ymax; ++y) {
- /*
- * Add a new edge to the active edge table when we
- * get to the next edge.
- */
- if (pSLL && y == pSLL->scanline) {
- loadAET(&AET, pSLL->edgelist);
- computeWAET(&AET);
- pSLL = pSLL->next;
- }
- pPrevAET = &AET;
- pAET = AET.next;
- pWETE = pAET;
+ pPrevAET = &AET;
+ pAET = AET.next;
- /*
- * for each active edge
- */
- while (pAET) {
/*
- * add to the buffer only those edges that
- * are in the Winding active edge table.
+ * for each active edge
*/
- if (pWETE == pAET) {
+ while (pAET) {
pts->setX(pAET->bres.minor_axis);
pts->setY(y);
++pts;
@@ -3702,7 +3654,8 @@ static QRegionPrivate *PolygonRegion(const QPoint *Pts, int Count, int rule)
* send out the buffer
*/
if (iPts == NUMPTSTOBUFFER) {
- tmpPtBlock = static_cast<POINTBLOCK *>(malloc(sizeof(POINTBLOCK)));
+ tmpPtBlock = (POINTBLOCK *)malloc(sizeof(POINTBLOCK));
+ Q_CHECK_PTR(tmpPtBlock);
tmpPtBlock->pts = reinterpret_cast<QPoint *>(tmpPtBlock->data);
curPtBlock->next = tmpPtBlock;
curPtBlock = tmpPtBlock;
@@ -3710,21 +3663,81 @@ static QRegionPrivate *PolygonRegion(const QPoint *Pts, int Count, int rule)
++numFullPtBlocks;
iPts = 0;
}
- pWETE = pWETE->nextWETE;
+ EVALUATEEDGEEVENODD(pAET, pPrevAET, y)
}
- EVALUATEEDGEWINDING(pAET, pPrevAET, y, fixWAET)
+ InsertionSort(&AET);
}
-
+ } else {
/*
- * recompute the winding active edge table if
- * we just resorted or have exited an edge.
+ * for each scanline
*/
- if (InsertionSort(&AET) || fixWAET) {
- computeWAET(&AET);
- fixWAET = false;
+ for (y = ET.ymin; y < ET.ymax; ++y) {
+ /*
+ * Add a new edge to the active edge table when we
+ * get to the next edge.
+ */
+ if (pSLL && y == pSLL->scanline) {
+ loadAET(&AET, pSLL->edgelist);
+ computeWAET(&AET);
+ pSLL = pSLL->next;
+ }
+ pPrevAET = &AET;
+ pAET = AET.next;
+ pWETE = pAET;
+
+ /*
+ * for each active edge
+ */
+ while (pAET) {
+ /*
+ * add to the buffer only those edges that
+ * are in the Winding active edge table.
+ */
+ if (pWETE == pAET) {
+ pts->setX(pAET->bres.minor_axis);
+ pts->setY(y);
+ ++pts;
+ ++iPts;
+
+ /*
+ * send out the buffer
+ */
+ if (iPts == NUMPTSTOBUFFER) {
+ tmpPtBlock = static_cast<POINTBLOCK *>(malloc(sizeof(POINTBLOCK)));
+ tmpPtBlock->pts = reinterpret_cast<QPoint *>(tmpPtBlock->data);
+ curPtBlock->next = tmpPtBlock;
+ curPtBlock = tmpPtBlock;
+ pts = curPtBlock->pts;
+ ++numFullPtBlocks;
+ iPts = 0;
+ }
+ pWETE = pWETE->nextWETE;
+ }
+ EVALUATEEDGEWINDING(pAET, pPrevAET, y, fixWAET)
+ }
+
+ /*
+ * recompute the winding active edge table if
+ * we just resorted or have exited an edge.
+ */
+ if (InsertionSort(&AET) || fixWAET) {
+ computeWAET(&AET);
+ fixWAET = false;
+ }
}
}
+ } QT_CATCH(...) {
+ FreeStorage(SLLBlock.next);
+ PtsToRegion(numFullPtBlocks, iPts, &FirstPtBlock, region);
+ for (curPtBlock = FirstPtBlock.next; --numFullPtBlocks >= 0;) {
+ tmpPtBlock = curPtBlock->next;
+ free(curPtBlock);
+ curPtBlock = tmpPtBlock;
+ }
+ free(pETEs);
+ return 0; // this function returns 0 in case of an error
}
+
FreeStorage(SLLBlock.next);
PtsToRegion(numFullPtBlocks, iPts, &FirstPtBlock, region);
for (curPtBlock = FirstPtBlock.next; --numFullPtBlocks >= 0;) {
@@ -3829,7 +3842,7 @@ QRegion::QRegion(const QRect &r, RegionType t)
#if defined(Q_WS_X11)
d->rgn = 0;
d->xrectangles = 0;
-#elif defined(Q_OS_WINCE)
+#elif defined(Q_WS_WIN)
d->rgn = 0;
#endif
if (t == Rectangle) {
@@ -3851,7 +3864,7 @@ QRegion::QRegion(const QPolygon &a, Qt::FillRule fillRule)
#if defined(Q_WS_X11)
d->rgn = 0;
d->xrectangles = 0;
-#elif defined(Q_OS_WINCE)
+#elif defined(Q_WS_WIN)
d->rgn = 0;
#endif
d->qt_rgn = PolygonRegion(a.constData(), a.size(),
@@ -3881,7 +3894,7 @@ QRegion::QRegion(const QBitmap &bm)
#if defined(Q_WS_X11)
d->rgn = 0;
d->xrectangles = 0;
-#elif defined(Q_OS_WINCE)
+#elif defined(Q_WS_WIN)
d->rgn = 0;
#endif
d->qt_rgn = qt_bitmapToRegion(bm);
@@ -3896,7 +3909,7 @@ void QRegion::cleanUp(QRegion::QRegionData *x)
XDestroyRegion(x->rgn);
if (x->xrectangles)
free(x->xrectangles);
-#elif defined(Q_OS_WINCE)
+#elif defined(Q_WS_WIN)
if (x->rgn)
qt_win_dispose_rgn(x->rgn);
#endif
@@ -3923,16 +3936,15 @@ QRegion &QRegion::operator=(const QRegion &r)
/*!
\internal
*/
-
QRegion QRegion::copy() const
{
QRegion r;
- QRegionData *x = new QRegionData;
+ QScopedPointer<QRegionData> x(new QRegionData);
x->ref = 1;
#if defined(Q_WS_X11)
x->rgn = 0;
x->xrectangles = 0;
-#elif defined(Q_OS_WINCE)
+#elif defined(Q_WS_WIN)
x->rgn = 0;
#endif
if (d->qt_rgn)
@@ -3941,7 +3953,7 @@ QRegion QRegion::copy() const
x->qt_rgn = new QRegionPrivate;
if (!r.d->ref.deref())
cleanUp(r.d);
- r.d = x;
+ r.d = x.take();
return r;
}
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