Long live Qt 4.5!

1 files changed, 576 insertions, 0 deletions

diff --git a/src/gui/painting/qregion_win.cpp b/src/gui/painting/qregion_win.cpp
new file mode 100644
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--- /dev/null
+++ b/src/gui/painting/qregion_win.cpp
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+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (qt-info@nokia.com)
+**
+** This file is part of the QtGui module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the either Technology Preview License Agreement or the
+** Beta Release License Agreement.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain
+** additional rights. These rights are described in the Nokia Qt LGPL
+** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
+** package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** 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.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qbitmap.h"
+#include "qbuffer.h"
+#include "qimage.h"
+#include "qpolygon.h"
+#include "qregion.h"
+#include "qt_windows.h"
+
+QT_BEGIN_NAMESPACE
+
+
+/*
+    In Windows versions before Windows Vista CreateRectRgn - when called in a multi-threaded
+    environment - might return an invalid handle. This function works around this limitation
+    by verifying the handle with a quick GetRegionData() call and re-creates the region
+    if necessary.
+*/
+HRGN qt_tryCreateRegion(QRegion::RegionType type, int left, int top, int right, int bottom)
+{
+    const int tries = 10;
+    for (int i = 0; i < tries; ++i) {
+        HRGN region;
+        switch (type) {
+        case QRegion::Rectangle:
+            region = CreateRectRgn(left, top, right, bottom);
+            break;
+        case QRegion::Ellipse:
+#ifndef Q_OS_WINCE
+            region = CreateEllipticRgn(left, top, right, bottom);
+#endif
+            break;
+        }
+        if (region) {
+            if (GetRegionData(region, 0, 0))
+                return region;
+            else
+                DeleteObject(region);
+        }
+    }
+    return 0;
+}
+
+#ifndef Q_OS_WINCE
+HRGN qt_tryCreatePolygonRegion(const QPolygon &a, Qt::FillRule fillRule)
+{
+    const int tries = 10;
+    for (int i = 0; i < tries; ++i) {
+        HRGN region = CreatePolygonRgn(reinterpret_cast<const POINT*>(a.data()), a.size(),
+                                       fillRule == Qt::OddEvenFill ? ALTERNATE : WINDING);
+        if (region) {
+            if (GetRegionData(region, 0, 0))
+                return region;
+            else
+                DeleteObject(region);
+        }
+    }
+    return 0;
+}
+#endif
+
+QRegion::QRegionData QRegion::shared_empty = { Q_BASIC_ATOMIC_INITIALIZER(1), 0 };
+
+QRegion::QRegion()
+    : d(&shared_empty)
+{
+    d->ref.ref();
+}
+
+#ifndef Q_OS_WINCE //implementation for WindowsCE in qregion_wce.cpp
+QRegion::QRegion(const QRect &r, RegionType t)
+{
+    if (r.isEmpty()) {
+        d = &shared_empty;
+        d->ref.ref();
+    } else {
+        d = new QRegionData;
+        d->ref = 1;
+        if (t == Rectangle)
+            d->rgn = qt_tryCreateRegion(t, r.left(), r.top(), r.x() + r.width(), r.y() + r.height());
+        else if (t == Ellipse) {
+            // need to add 1 to width/height for the ellipse to have correct boundingrect.
+            d->rgn = qt_tryCreateRegion(t, r.x(), r.y(), r.x() + r.width() + 1, r.y() + r.height() + 1);
+        }
+    }
+}
+#endif
+
+#ifndef Q_OS_WINCE //implementation for WindowsCE in qregion_wce.cpp
+QRegion::QRegion(const QPolygon &a, Qt::FillRule fillRule)
+{
+    if (a.size() < 3) {
+        d = &shared_empty;
+        d->ref.ref();
+    } else {
+        d = new QRegionData;
+        d->ref = 1;
+        d->rgn = qt_tryCreatePolygonRegion(a, fillRule);
+    }
+}
+#endif
+
+QRegion::QRegion(const QRegion &r)
+{
+    d = r.d;
+    d->ref.ref();
+}
+
+HRGN qt_win_bitmapToRegion(const QBitmap& bitmap)
+{
+    HRGN region=0;
+    QImage image = bitmap.toImage();
+    const int MAXRECT = 256;
+    struct RData {
+        RGNDATAHEADER header;
+        RECT rect[MAXRECT];
+    };
+    RData data;
+
+#define FlushSpans \
+    { \
+                data.header.dwSize = sizeof(RGNDATAHEADER); \
+                data.header.iType = RDH_RECTANGLES; \
+                data.header.nCount = n; \
+                data.header.nRgnSize = 0; \
+                data.header.rcBound.bottom = y; \
+                HRGN r = ExtCreateRegion(0, \
+                    sizeof(RGNDATAHEADER)+n*sizeof(RECT),(RGNDATA*)&data); \
+                if (region) { \
+                    CombineRgn(region, region, r, RGN_OR); \
+                    DeleteObject(r); \
+                } else { \
+                    region = r; \
+                } \
+                data.header.rcBound.top = y; \
+        }
+
+#define AddSpan \
+        { \
+            data.rect[n].left=prev1; \
+            data.rect[n].top=y; \
+            data.rect[n].right=x-1+1; \
+            data.rect[n].bottom=y+1; \
+            n++; \
+            if (n == MAXRECT) { \
+                FlushSpans \
+                n=0; \
+            } \
+        }
+
+    data.header.rcBound.top = 0;
+    data.header.rcBound.left = 0;
+    data.header.rcBound.right = image.width()-1;
+    int n = 0;
+
+    int zero = 0x00;
+
+    int x, y;
+    for (y = 0; y < image.height(); ++y) {
+        uchar *line = image.scanLine(y);
+        int w = image.width();
+        uchar all=zero;
+        int prev1 = -1;
+        for (x = 0; x < w;) {
+            uchar byte = line[x/8];
+            if (x > w - 8 || byte != all) {
+                for (int b = 8; b > 0 && x < w; --b) {
+                    if (!(byte & 0x01) == !all) {
+                        // More of the same
+                    } else {
+                        // A change.
+                        if (all != zero) {
+                            AddSpan;
+                            all = zero;
+                        } else {
+                            prev1 = x;
+                            all = ~zero;
+                        }
+                    }
+                    byte >>= 1;
+                    ++x;
+                }
+            } else {
+                x += 8;
+            }
+        }
+        if (all != zero) {
+            AddSpan;
+        }
+    }
+    if (n) {
+        FlushSpans;
+    }
+
+    if (!region) {
+        // Surely there is some better way.
+        region = qt_tryCreateRegion(QRegion::Rectangle, 0,0,1,1);
+        CombineRgn(region, region, region, RGN_XOR);
+    }
+    return region;
+}
+
+#ifndef Q_OS_WINCE //implementation for WindowsCE in qregion_wce.cpp
+QRegion::QRegion(const QBitmap &bm)
+{
+    if (bm.isNull()) {
+        d = &shared_empty;
+        d->ref.ref();
+    } else {
+        d = new QRegionData;
+        d->ref = 1;
+        d->rgn = qt_win_bitmapToRegion(bm);
+    }
+}
+#endif
+
+void QRegion::cleanUp(QRegion::QRegionData *x)
+{
+    if (x->rgn)
+        DeleteObject(x->rgn);
+    delete x;
+}
+
+QRegion::~QRegion()
+{
+    if (!d->ref.deref())
+        cleanUp(d);
+}
+
+QRegion &QRegion::operator=(const QRegion &r)
+{
+    r.d->ref.ref();
+    if (!d->ref.deref())
+        cleanUp(d);
+    d = r.d;
+    return *this;
+}
+
+
+QRegion QRegion::copy() const
+{
+    QRegion r;
+    QRegionData *x = new QRegionData;
+    x->ref = 1;
+    if (d->rgn) {
+        x->rgn = qt_tryCreateRegion(QRegion::Rectangle, 0, 0, 2, 2);
+        CombineRgn(x->rgn, d->rgn, 0, RGN_COPY);
+    } else {
+        x->rgn = 0;
+    }
+    if (!r.d->ref.deref())
+        cleanUp(r.d);
+    r.d = x;
+    return r;
+}
+
+bool QRegion::isEmpty() const
+{
+    return (d == &shared_empty || boundingRect().isEmpty());
+}
+
+
+bool QRegion::contains(const QPoint &p) const
+{
+    return d->rgn ? PtInRegion(d->rgn, p.x(), p.y()) : false;
+}
+
+bool QRegion::contains(const QRect &r) const
+{
+    if (!d->rgn)
+        return false;
+    RECT rect;
+    SetRect(&rect, r.left(), r.top(), r.right(), r.bottom());
+    return RectInRegion(d->rgn, &rect);
+}
+
+
+void QRegion::translate(int dx, int dy)
+{
+    if (!d->rgn || (dx == 0 && dy == 0))
+        return;
+    detach();
+    OffsetRgn(d->rgn, dx, dy);
+}
+
+
+#define RGN_NOP -1
+
+// Duplicates of those in qregion.cpp
+#define QRGN_OR               6
+#define QRGN_AND              7
+#define QRGN_SUB              8
+#define QRGN_XOR              9
+
+/*
+  Performs the actual OR, AND, SUB and XOR operation between regions.
+  Sets the resulting region handle to 0 to indicate an empty region.
+*/
+
+QRegion QRegion::winCombine(const QRegion &r, int op) const
+{
+    int both=RGN_NOP,
+        left=RGN_NOP,
+        right=RGN_NOP;
+    switch (op) {
+        case QRGN_OR:
+            both = RGN_OR;
+            left = right = RGN_COPY;
+            break;
+        case QRGN_AND:
+            both = RGN_AND;
+            break;
+        case QRGN_SUB:
+            both = RGN_DIFF;
+            left = RGN_COPY;
+            break;
+        case QRGN_XOR:
+            both = RGN_XOR;
+            left = right = RGN_COPY;
+            break;
+        default:
+            qWarning("QRegion: Internal error in winCombine");
+    }
+
+    int allCombineRgnResults = NULLREGION;
+    QRegion result;
+    result.detach();
+    result.d->rgn = qt_tryCreateRegion(QRegion::Rectangle, 0, 0, 0, 0);
+    if (d->rgn && r.d->rgn)
+        allCombineRgnResults = CombineRgn(result.d->rgn, d->rgn, r.d->rgn, both);
+    else if (d->rgn && left != RGN_NOP)
+        allCombineRgnResults = CombineRgn(result.d->rgn, d->rgn, d->rgn, left);
+    else if (r.d->rgn && right != RGN_NOP)
+        allCombineRgnResults = CombineRgn(result.d->rgn, r.d->rgn, r.d->rgn, right);
+
+    if (allCombineRgnResults == NULLREGION || allCombineRgnResults == ERROR)
+        result = QRegion();
+
+    //##### do not delete this. A null pointer is different from an empty region in SelectClipRgn in qpainter_win! (M)
+//     if (allCombineRgnResults == NULLREGION) {
+//         if (result.data->rgn)
+//             DeleteObject(result.data->rgn);
+//         result.data->rgn = 0;                        // empty region
+//     }
+    return result;
+}
+
+QRegion QRegion::unite(const QRegion &r) const
+{
+    if (!d->rgn)
+        return r;
+    if (!r.d->rgn)
+        return *this;
+    return winCombine(r, QRGN_OR);
+}
+
+QRegion QRegion::unite(const QRect &r) const
+{
+    return unite(QRegion(r));
+}
+
+QRegion QRegion::intersect(const QRegion &r) const
+{
+    if (!r.d->rgn || !d->rgn)
+        return QRegion();
+     return winCombine(r, QRGN_AND);
+}
+
+QRegion QRegion::subtract(const QRegion &r) const
+{
+    if (!r.d->rgn || !d->rgn)
+        return *this;
+    return winCombine(r, QRGN_SUB);
+}
+
+QRegion QRegion::eor(const QRegion &r) const
+{
+    if (!d->rgn)
+        return r;
+    if (!r.d->rgn)
+        return *this;
+    return winCombine(r, QRGN_XOR);
+}
+
+
+QRect QRegion::boundingRect() const
+{
+    if (!d->rgn)
+        return QRect();
+    RECT r;
+    if (GetRgnBox(d->rgn, &r) == NULLREGION)
+        return QRect();
+    else
+        return QRect(r.left, r.top, r.right - r.left, r.bottom - r.top);
+}
+
+QVector<QRect> QRegion::rects() const
+{
+    if (d->rgn == 0)
+        return QVector<QRect>();
+
+    int numBytes = GetRegionData(d->rgn, 0, 0);
+    if (numBytes == 0)
+        return QVector<QRect>();
+
+    char *buf = new char[numBytes];
+    if (buf == 0)
+        return QVector<QRect>();
+
+    RGNDATA *rd = reinterpret_cast<RGNDATA*>(buf);
+    if (GetRegionData(d->rgn, numBytes, rd) == 0) {
+        delete [] buf;
+        return QVector<QRect>();
+    }
+
+    QVector<QRect> a(rd->rdh.nCount);
+    RECT *r = reinterpret_cast<RECT*>(rd->Buffer);
+    for (int i = 0; i < a.size(); ++i) {
+        a[i].setCoords(r->left, r->top, r->right - 1, r->bottom - 1);
+        ++r;
+    }
+
+    delete [] buf;
+    return a;
+}
+
+void QRegion::setRects(const QRect *rects, int num)
+{
+    *this = QRegion();
+    if (!rects || num == 0 || (num == 1 && rects->isEmpty()))
+        return;
+    for (int i = 0; i < num; ++i)
+        *this |= rects[i];
+}
+
+int QRegion::numRects() const
+{
+    if (d->rgn == 0)
+        return 0;
+
+    const int numBytes = GetRegionData(d->rgn, 0, 0);
+    if (numBytes == 0)
+        return 0;
+
+    char *buf = new char[numBytes];
+    if (buf == 0)
+        return 0;
+
+    RGNDATA *rd = reinterpret_cast<RGNDATA*>(buf);
+    if (GetRegionData(d->rgn, numBytes, rd) == 0) {
+        delete[] buf;
+        return 0;
+    }
+
+    const int n = rd->rdh.nCount;
+    delete[] buf;
+
+    return n;
+}
+
+bool QRegion::operator==(const QRegion &r) const
+{
+    if (d == r.d)
+        return true;
+    if ((d->rgn == 0) ^ (r.d->rgn == 0)) // one is empty, not both
+        return false;
+    return d->rgn == 0 ? true // both empty
+                       : EqualRgn(d->rgn, r.d->rgn); // both non-empty
+}
+
+QRegion& QRegion::operator+=(const QRegion &r)
+{
+    if (!r.d->rgn)
+        return *this;
+
+    if (!d->rgn) {
+        *this = r;
+        return *this;
+    }
+
+    detach();
+
+    int result;
+    result = CombineRgn(d->rgn, d->rgn, r.d->rgn, RGN_OR);
+    if (result == NULLREGION || result == ERROR)
+        *this = QRegion();
+
+    return *this;
+}
+
+QRegion& QRegion::operator-=(const QRegion &r)
+{
+    if (!r.d->rgn || !d->rgn)
+        return *this;
+
+    detach();
+
+    int result;
+    result = CombineRgn(d->rgn, d->rgn, r.d->rgn, RGN_DIFF);
+    if (result == NULLREGION || result == ERROR)
+        *this = QRegion();
+
+    return *this;
+}
+
+QRegion& QRegion::operator&=(const QRegion &r)
+{
+    if (!d->rgn)
+        return *this;
+
+    if (!r.d->rgn) {
+        *this = QRegion();
+        return *this;
+    }
+
+    detach();
+
+    int result;
+    result = CombineRgn(d->rgn, d->rgn, r.d->rgn, RGN_AND);
+    if (result == NULLREGION || result == ERROR)
+        *this = QRegion();
+
+    return *this;
+}
+
+bool qt_region_strictContains(const QRegion &region, const QRect &rect)
+{
+    Q_UNUSED(region);
+    Q_UNUSED(rect);
+    return false;
+}
+
+void QRegion::ensureHandle() const
+{
+}
+
+QT_END_NAMESPACE