qdrawutil.cpp

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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
 
#include "qdrawutil.h"
#include "qbitmap.h"
#include "qpixmapcache.h"
#include "qpainter.h"
#include "qpalette.h"
#include <private/qpaintengineex_p.h>
#include <qvarlengtharray.h>
#include <qmath.h>
#include <private/qhexstring_p.h>
 
QT_BEGIN_NAMESPACE
 
namespace {
class PainterStateGuard {
    Q_DISABLE_COPY_MOVE(PainterStateGuard)
public:
    explicit PainterStateGuard(QPainter *p) : m_painter(p) {}
    ~PainterStateGuard()
    {
        for ( ; m_level > 0; --m_level)
            m_painter->restore();
    }
 
    void save()
    {
        m_painter->save();
        ++m_level;
    }
 
    void restore()
    {
        m_painter->restore();
        --m_level;
    }
 
private:
    QPainter *m_painter;
    int m_level= 0;
};
} // namespace
 
void qDrawShadeLine(QPainter *p, int x1, int y1, int x2, int y2,
                     const QPalette &pal, bool sunken,
                     int lineWidth, int midLineWidth)
{
    if (Q_UNLIKELY(!p || lineWidth < 0 || midLineWidth < 0)) {
        qWarning("qDrawShadeLine: Invalid parameters");
        return;
    }
    PainterStateGuard painterGuard(p);
    const qreal devicePixelRatio = p->device()->devicePixelRatio();
    if (!qFuzzyCompare(devicePixelRatio, qreal(1))) {
        painterGuard.save();
        const qreal inverseScale = qreal(1) / devicePixelRatio;
        p->scale(inverseScale, inverseScale);
        x1 = qRound(devicePixelRatio * x1);
        y1 = qRound(devicePixelRatio * y1);
        x2 = qRound(devicePixelRatio * x2);
        y2 = qRound(devicePixelRatio * y2);
        lineWidth = qRound(devicePixelRatio * lineWidth);
        midLineWidth = qRound(devicePixelRatio * midLineWidth);
        p->translate(0.5, 0.5);
    }
    int tlw = lineWidth*2 + midLineWidth;        // total line width
    QPen oldPen = p->pen();                        // save pen
    if (sunken)
        p->setPen(pal.color(QPalette::Dark));
    else
        p->setPen(pal.light().color());
    QPolygon a;
    int i;
    if (y1 == y2) {                                // horizontal line
        int y = y1 - tlw/2;
        if (x1 > x2) {                        // swap x1 and x2
            int t = x1;
            x1 = x2;
            x2 = t;
        }
        x2--;
        for (i=0; i<lineWidth; i++) {                // draw top shadow
            a.setPoints(3, x1+i, y+tlw-1-i,
                         x1+i, y+i,
                         x2-i, y+i);
            p->drawPolyline(a);
        }
        if (midLineWidth > 0) {
            p->setPen(pal.mid().color());
            for (i=0; i<midLineWidth; i++)        // draw lines in the middle
                p->drawLine(x1+lineWidth, y+lineWidth+i,
                             x2-lineWidth, y+lineWidth+i);
        }
        if (sunken)
            p->setPen(pal.light().color());
        else
            p->setPen(pal.dark().color());
        for (i=0; i<lineWidth; i++) {                // draw bottom shadow
            a.setPoints(3, x1+i, y+tlw-i-1,
                         x2-i, y+tlw-i-1,
                         x2-i, y+i+1);
            p->drawPolyline(a);
        }
    }
    else if (x1 == x2) {                        // vertical line
        int x = x1 - tlw/2;
        if (y1 > y2) {                        // swap y1 and y2
            int t = y1;
            y1 = y2;
            y2 = t;
        }
        y2--;
        for (i=0; i<lineWidth; i++) {                // draw left shadow
            a.setPoints(3, x+i, y2,
                         x+i, y1+i,
                         x+tlw-1, y1+i);
            p->drawPolyline(a);
        }
        if (midLineWidth > 0) {
            p->setPen(pal.mid().color());
            for (i=0; i<midLineWidth; i++)        // draw lines in the middle
                p->drawLine(x+lineWidth+i, y1+lineWidth, x+lineWidth+i, y2);
        }
        if (sunken)
            p->setPen(pal.light().color());
        else
            p->setPen(pal.dark().color());
        for (i=0; i<lineWidth; i++) {                // draw right shadow
            a.setPoints(3, x+lineWidth, y2-i,
                         x+tlw-i-1, y2-i,
                         x+tlw-i-1, y1+lineWidth);
            p->drawPolyline(a);
        }
    }
    p->setPen(oldPen);
}
 
void qDrawShadeRect(QPainter *p, int x, int y, int w, int h,
                     const QPalette &pal, bool sunken,
                     int lineWidth, int midLineWidth,
                     const QBrush *fill)
{
    if (w == 0 || h == 0)
        return;
    if (Q_UNLIKELY(w < 0 || h < 0 || lineWidth < 0 || midLineWidth < 0)) {
        qWarning("qDrawShadeRect: Invalid parameters");
        return;
    }
 
    PainterStateGuard painterGuard(p);
    const qreal devicePixelRatio = p->device()->devicePixelRatio();
    if (!qFuzzyCompare(devicePixelRatio, qreal(1))) {
        painterGuard.save();
        const qreal inverseScale = qreal(1) / devicePixelRatio;
        p->scale(inverseScale, inverseScale);
        x = qRound(devicePixelRatio * x);
        y = qRound(devicePixelRatio * y);
        w = devicePixelRatio * w;
        h = devicePixelRatio * h;
        lineWidth = qRound(devicePixelRatio * lineWidth);
        midLineWidth = qRound(devicePixelRatio * midLineWidth);
        p->translate(0.5, 0.5);
    }
 
    QPen oldPen = p->pen();
    if (sunken)
        p->setPen(pal.dark().color());
    else
        p->setPen(pal.light().color());
    int x1=x, y1=y, x2=x+w-1, y2=y+h-1;
 
    if (lineWidth == 1 && midLineWidth == 0) {// standard shade rectangle
        p->drawRect(x1, y1, w-2, h-2);
        if (sunken)
            p->setPen(pal.light().color());
        else
            p->setPen(pal.dark().color());
        QLineF lines[4] = { QLineF(x1+1, y1+1, x2-2, y1+1),
                            QLineF(x1+1, y1+2, x1+1, y2-2),
                            QLineF(x1, y2, x2, y2),
                            QLineF(x2,y1, x2,y2-1) };
        p->drawLines(lines, 4);              // draw bottom/right lines
    } else {                                        // more complicated
        int m = lineWidth+midLineWidth;
        int i, j=0, k=m;
        for (i=0; i<lineWidth; i++) {                // draw top shadow
            QLineF lines[4] = { QLineF(x1+i, y2-i, x1+i, y1+i),
                                QLineF(x1+i, y1+i, x2-i, y1+i),
                                QLineF(x1+k, y2-k, x2-k, y2-k),
                                QLineF(x2-k, y2-k, x2-k, y1+k) };
            p->drawLines(lines, 4);
            k++;
        }
        p->setPen(pal.mid().color());
        j = lineWidth*2;
        for (i=0; i<midLineWidth; i++) {        // draw lines in the middle
            p->drawRect(x1+lineWidth+i, y1+lineWidth+i, w-j-1, h-j-1);
            j += 2;
        }
        if (sunken)
            p->setPen(pal.light().color());
        else
            p->setPen(pal.dark().color());
        k = m;
        for (i=0; i<lineWidth; i++) {                // draw bottom shadow
            QLineF lines[4] = { QLineF(x1+1+i, y2-i, x2-i, y2-i),
                                QLineF(x2-i, y2-i, x2-i, y1+i+1),
                                QLineF(x1+k, y2-k, x1+k, y1+k),
                                QLineF(x1+k, y1+k, x2-k, y1+k) };
            p->drawLines(lines, 4);
            k++;
        }
    }
    if (fill) {
        QBrush oldBrush = p->brush();
        int tlw = lineWidth + midLineWidth;
        p->setPen(Qt::NoPen);
        p->setBrush(*fill);
        p->drawRect(x+tlw, y+tlw, w-2*tlw, h-2*tlw);
        p->setBrush(oldBrush);
    }
    p->setPen(oldPen);                        // restore pen
}
 
 
void qDrawShadePanel(QPainter *p, int x, int y, int w, int h,
                      const QPalette &pal, bool sunken,
                      int lineWidth, const QBrush *fill)
{
    if (w == 0 || h == 0)
        return;
    if (Q_UNLIKELY(w < 0 || h < 0 || lineWidth < 0)) {
        qWarning("qDrawShadePanel: Invalid parameters");
    }
 
    PainterStateGuard painterGuard(p);
    const qreal devicePixelRatio = p->device()->devicePixelRatio();
    bool isTranslated = false;
    if (!qFuzzyCompare(devicePixelRatio, qreal(1))) {
        painterGuard.save();
        const qreal inverseScale = qreal(1) / devicePixelRatio;
        p->scale(inverseScale, inverseScale);
        x = qRound(devicePixelRatio * x);
        y = qRound(devicePixelRatio * y);
        w = devicePixelRatio * w;
        h = devicePixelRatio * h;
        lineWidth = qRound(devicePixelRatio * lineWidth);
        p->translate(0.5, 0.5);
        isTranslated = true;
    }
 
    QColor shade = pal.dark().color();
    QColor light = pal.light().color();
    if (fill) {
        if (fill->color() == shade)
            shade = pal.shadow().color();
        if (fill->color() == light)
            light = pal.midlight().color();
    }
    QPen oldPen = p->pen();                        // save pen
    QList<QLineF> lines;
    lines.reserve(2*lineWidth);
 
    if (sunken)
        p->setPen(shade);
    else
        p->setPen(light);
    int x1, y1, x2, y2;
    int i;
    x1 = x;
    y1 = y2 = y;
    x2 = x+w-2;
    for (i=0; i<lineWidth; i++) {                // top shadow
        lines << QLineF(x1, y1++, x2--, y2++);
    }
    x2 = x1;
    y1 = y+h-2;
    for (i=0; i<lineWidth; i++) {                // left shado
        lines << QLineF(x1++, y1, x2++, y2--);
    }
    p->drawLines(lines);
    lines.clear();
    if (sunken)
        p->setPen(light);
    else
        p->setPen(shade);
    x1 = x;
    y1 = y2 = y+h-1;
    x2 = x+w-1;
    for (i=0; i<lineWidth; i++) {                // bottom shadow
        lines << QLineF(x1++, y1--, x2, y2--);
    }
    x1 = x2;
    y1 = y;
    y2 = y+h-lineWidth-1;
    for (i=0; i<lineWidth; i++) {                // right shadow
        lines << QLineF(x1--, y1++, x2--, y2);
    }
    p->drawLines(lines);
    if (fill) {                                // fill with fill color
        if (isTranslated)
            p->translate(-0.5, -0.5);
        p->fillRect(x+lineWidth, y+lineWidth, w-lineWidth*2, h-lineWidth*2, *fill);
    }
    p->setPen(oldPen);                        // restore pen
}
 
 
static void qDrawWinShades(QPainter *p,
                           int x, int y, int w, int h,
                           const QColor &c1, const QColor &c2,
                           const QColor &c3, const QColor &c4,
                           const QBrush *fill)
{
    if (w < 2 || h < 2)                        // can't do anything with that
        return;
 
    PainterStateGuard painterGuard(p);
    const qreal devicePixelRatio = p->device()->devicePixelRatio();
    bool isTranslated = false;
    if (!qFuzzyCompare(devicePixelRatio, qreal(1))) {
        painterGuard.save();
        const qreal inverseScale = qreal(1) / devicePixelRatio;
        p->scale(inverseScale, inverseScale);
        x = qRound(devicePixelRatio * x);
        y = qRound(devicePixelRatio * y);
        w = devicePixelRatio * w;
        h = devicePixelRatio * h;
        p->translate(0.5, 0.5);
        isTranslated = true;
    }
 
    QPen oldPen = p->pen();
    QPoint a[3] = { QPoint(x, y+h-2), QPoint(x, y), QPoint(x+w-2, y) };
    p->setPen(c1);
    p->drawPolyline(a, 3);
    QPoint b[3] = { QPoint(x, y+h-1), QPoint(x+w-1, y+h-1), QPoint(x+w-1, y) };
    p->setPen(c2);
    p->drawPolyline(b, 3);
    if (w > 4 && h > 4) {
        QPoint c[3] = { QPoint(x+1, y+h-3), QPoint(x+1, y+1), QPoint(x+w-3, y+1) };
        p->setPen(c3);
        p->drawPolyline(c, 3);
        QPoint d[3] = { QPoint(x+1, y+h-2), QPoint(x+w-2, y+h-2), QPoint(x+w-2, y+1) };
        p->setPen(c4);
        p->drawPolyline(d, 3);
        if (fill) {
            if (isTranslated)
                p->translate(-0.5, -0.5);
            p->fillRect(QRect(x+2, y+2, w-4, h-4), *fill);
        }
    }
    p->setPen(oldPen);
}
 
 
void qDrawWinButton(QPainter *p, int x, int y, int w, int h,
                     const QPalette &pal, bool sunken,
                     const QBrush *fill)
{
    if (sunken)
        qDrawWinShades(p, x, y, w, h,
                       pal.shadow().color(), pal.light().color(), pal.dark().color(),
                       pal.button().color(), fill);
    else
        qDrawWinShades(p, x, y, w, h,
                       pal.light().color(), pal.shadow().color(), pal.button().color(),
                       pal.dark().color(), fill);
}
 
void qDrawWinPanel(QPainter *p, int x, int y, int w, int h,
                    const QPalette &pal, bool        sunken,
                    const QBrush *fill)
{
    if (sunken)
        qDrawWinShades(p, x, y, w, h,
                        pal.dark().color(), pal.light().color(), pal.shadow().color(),
                       pal.midlight().color(), fill);
    else
        qDrawWinShades(p, x, y, w, h,
                       pal.light().color(), pal.shadow().color(), pal.midlight().color(),
                       pal.dark().color(), fill);
}
 
void qDrawPlainRect(QPainter *p, int x, int y, int w, int h, const QColor &c,
                     int lineWidth, const QBrush *fill)
{
    if (w == 0 || h == 0)
        return;
    if (Q_UNLIKELY(w < 0 || h < 0 || lineWidth < 0)) {
        qWarning("qDrawPlainRect: Invalid parameters");
    }
 
    PainterStateGuard painterGuard(p);
    const qreal devicePixelRatio = p->device()->devicePixelRatio();
    if (!qFuzzyCompare(devicePixelRatio, qreal(1))) {
        painterGuard.save();
        const qreal inverseScale = qreal(1) / devicePixelRatio;
        p->scale(inverseScale, inverseScale);
        x = qRound(devicePixelRatio * x);
        y = qRound(devicePixelRatio * y);
        w = devicePixelRatio * w;
        h = devicePixelRatio * h;
        lineWidth = qRound(devicePixelRatio * lineWidth);
        p->translate(0.5, 0.5);
    }
 
    QPen   oldPen   = p->pen();
    QBrush oldBrush = p->brush();
    p->setPen(c);
    p->setBrush(Qt::NoBrush);
    for (int i=0; i<lineWidth; i++)
        p->drawRect(x+i, y+i, w-i*2 - 1, h-i*2 - 1);
    if (fill) {                                // fill with fill color
        p->setPen(Qt::NoPen);
        p->setBrush(*fill);
        p->drawRect(x+lineWidth, y+lineWidth, w-lineWidth*2, h-lineWidth*2);
    }
    p->setPen(oldPen);
    p->setBrush(oldBrush);
}
 
/*****************************************************************************
  Overloaded functions.
 *****************************************************************************/
 
void qDrawShadeLine(QPainter *p, const QPoint &p1, const QPoint &p2,
                     const QPalette &pal, bool sunken,
                     int lineWidth, int midLineWidth)
{
    qDrawShadeLine(p, p1.x(), p1.y(), p2.x(), p2.y(), pal, sunken,
                    lineWidth, midLineWidth);
}
 
void qDrawShadeRect(QPainter *p, const QRect &r,
                     const QPalette &pal, bool sunken,
                     int lineWidth, int midLineWidth,
                     const QBrush *fill)
{
    qDrawShadeRect(p, r.x(), r.y(), r.width(), r.height(), pal, sunken,
                    lineWidth, midLineWidth, fill);
}
 
void qDrawShadePanel(QPainter *p, const QRect &r,
                      const QPalette &pal, bool sunken,
                      int lineWidth, const QBrush *fill)
{
    qDrawShadePanel(p, r.x(), r.y(), r.width(), r.height(), pal, sunken,
                     lineWidth, fill);
}
 
void qDrawWinButton(QPainter *p, const QRect &r,
                     const QPalette &pal, bool sunken, const QBrush *fill)
{
    qDrawWinButton(p, r.x(), r.y(), r.width(), r.height(), pal, sunken, fill);
}
 
void qDrawWinPanel(QPainter *p, const QRect &r,
                    const QPalette &pal, bool sunken, const QBrush *fill)
{
    qDrawWinPanel(p, r.x(), r.y(), r.width(), r.height(), pal, sunken, fill);
}
 
void qDrawPlainRect(QPainter *p, const QRect &r, const QColor &c,
                     int lineWidth, const QBrush *fill)
{
    qDrawPlainRect(p, r.x(), r.y(), r.width(), r.height(), c,
                    lineWidth, fill);
}
 
 
typedef QVarLengthArray<QPainter::PixmapFragment, 16> QPixmapFragmentsArray;
 
void qDrawBorderPixmap(QPainter *painter, const QRect &targetRect, const QMargins &targetMargins,
                       const QPixmap &pixmap, const QRect &sourceRect,const QMargins &sourceMargins,
                       const QTileRules &rules
#ifndef Q_QDOC
                       , QDrawBorderPixmap::DrawingHints hints
#endif
                       )
{
    QPainter::PixmapFragment d;
    d.opacity = 1.0;
    d.rotation = 0.0;
 
    QPixmapFragmentsArray opaqueData;
    QPixmapFragmentsArray translucentData;
 
    // source center
    const int sourceCenterTop = sourceRect.top() + sourceMargins.top();
    const int sourceCenterLeft = sourceRect.left() + sourceMargins.left();
    const int sourceCenterBottom = sourceRect.bottom() - sourceMargins.bottom() + 1;
    const int sourceCenterRight = sourceRect.right() - sourceMargins.right() + 1;
    const int sourceCenterWidth = sourceCenterRight - sourceCenterLeft;
    const int sourceCenterHeight = sourceCenterBottom - sourceCenterTop;
    // target center
    const int targetCenterTop = targetRect.top() + targetMargins.top();
    const int targetCenterLeft = targetRect.left() + targetMargins.left();
    const int targetCenterBottom = targetRect.bottom() - targetMargins.bottom() + 1;
    const int targetCenterRight = targetRect.right() - targetMargins.right() + 1;
    const int targetCenterWidth = targetCenterRight - targetCenterLeft;
    const int targetCenterHeight = targetCenterBottom - targetCenterTop;
 
    QVarLengthArray<qreal, 16> xTarget; // x-coordinates of target rectangles
    QVarLengthArray<qreal, 16> yTarget; // y-coordinates of target rectangles
 
    int columns = 3;
    int rows = 3;
    if (rules.horizontal != Qt::StretchTile && sourceCenterWidth != 0)
        columns = qMax(3, 2 + qCeil(targetCenterWidth / qreal(sourceCenterWidth)));
    if (rules.vertical != Qt::StretchTile && sourceCenterHeight != 0)
        rows = qMax(3, 2 + qCeil(targetCenterHeight / qreal(sourceCenterHeight)));
 
    xTarget.resize(columns + 1);
    yTarget.resize(rows + 1);
 
    bool oldAA = painter->testRenderHint(QPainter::Antialiasing);
    if (painter->paintEngine()->type() != QPaintEngine::OpenGL
        && painter->paintEngine()->type() != QPaintEngine::OpenGL2
        && oldAA && painter->combinedTransform().type() != QTransform::TxNone) {
        painter->setRenderHint(QPainter::Antialiasing, false);
    }
 
    xTarget[0] = targetRect.left();
    xTarget[1] = targetCenterLeft;
    xTarget[columns - 1] = targetCenterRight;
    xTarget[columns] = targetRect.left() + targetRect.width();
 
    yTarget[0] = targetRect.top();
    yTarget[1] = targetCenterTop;
    yTarget[rows - 1] = targetCenterBottom;
    yTarget[rows] = targetRect.top() + targetRect.height();
 
    qreal dx = targetCenterWidth;
    qreal dy = targetCenterHeight;
 
    switch (rules.horizontal) {
    case Qt::StretchTile:
        dx = targetCenterWidth;
        break;
    case Qt::RepeatTile:
        dx = sourceCenterWidth;
        break;
    case Qt::RoundTile:
        dx = targetCenterWidth / qreal(columns - 2);
        break;
    }
 
    for (int i = 2; i < columns - 1; ++i)
        xTarget[i] = xTarget[i - 1] + dx;
 
    switch (rules.vertical) {
    case Qt::StretchTile:
        dy = targetCenterHeight;
        break;
    case Qt::RepeatTile:
        dy = sourceCenterHeight;
        break;
    case Qt::RoundTile:
        dy = targetCenterHeight / qreal(rows - 2);
        break;
    }
 
    for (int i = 2; i < rows - 1; ++i)
        yTarget[i] = yTarget[i - 1] + dy;
 
    // corners
    if (targetMargins.top() > 0 && targetMargins.left() > 0 && sourceMargins.top() > 0 && sourceMargins.left() > 0) { // top left
        d.x = (0.5 * (xTarget[1] + xTarget[0]));
        d.y = (0.5 * (yTarget[1] + yTarget[0]));
        d.sourceLeft = sourceRect.left();
        d.sourceTop = sourceRect.top();
        d.width = sourceMargins.left();
        d.height = sourceMargins.top();
        d.scaleX = qreal(xTarget[1] - xTarget[0]) / d.width;
        d.scaleY = qreal(yTarget[1] - yTarget[0]) / d.height;
        if (hints & QDrawBorderPixmap::OpaqueTopLeft)
            opaqueData.append(d);
        else
            translucentData.append(d);
    }
    if (targetMargins.top() > 0 && targetMargins.right() > 0 && sourceMargins.top() > 0 && sourceMargins.right() > 0) { // top right
        d.x = (0.5 * (xTarget[columns] + xTarget[columns - 1]));
        d.y = (0.5 * (yTarget[1] + yTarget[0]));
        d.sourceLeft = sourceCenterRight;
        d.sourceTop = sourceRect.top();
        d.width = sourceMargins.right();
        d.height = sourceMargins.top();
        d.scaleX = qreal(xTarget[columns] - xTarget[columns - 1]) / d.width;
        d.scaleY = qreal(yTarget[1] - yTarget[0]) / d.height;
        if (hints & QDrawBorderPixmap::OpaqueTopRight)
            opaqueData.append(d);
        else
            translucentData.append(d);
    }
    if (targetMargins.bottom() > 0 && targetMargins.left() > 0 && sourceMargins.bottom() > 0 && sourceMargins.left() > 0) { // bottom left
        d.x = (0.5 * (xTarget[1] + xTarget[0]));
        d.y =(0.5 * (yTarget[rows] + yTarget[rows - 1]));
        d.sourceLeft = sourceRect.left();
        d.sourceTop = sourceCenterBottom;
        d.width = sourceMargins.left();
        d.height = sourceMargins.bottom();
        d.scaleX = qreal(xTarget[1] - xTarget[0]) / d.width;
        d.scaleY = qreal(yTarget[rows] - yTarget[rows - 1]) / d.height;
        if (hints & QDrawBorderPixmap::OpaqueBottomLeft)
            opaqueData.append(d);
        else
            translucentData.append(d);
    }
    if (targetMargins.bottom() > 0 && targetMargins.right() > 0 && sourceMargins.bottom() > 0 && sourceMargins.right() > 0) { // bottom right
        d.x = (0.5 * (xTarget[columns] + xTarget[columns - 1]));
        d.y = (0.5 * (yTarget[rows] + yTarget[rows - 1]));
        d.sourceLeft = sourceCenterRight;
        d.sourceTop = sourceCenterBottom;
        d.width = sourceMargins.right();
        d.height = sourceMargins.bottom();
        d.scaleX = qreal(xTarget[columns] - xTarget[columns - 1]) / d.width;
        d.scaleY = qreal(yTarget[rows] - yTarget[rows - 1]) / d.height;
        if (hints & QDrawBorderPixmap::OpaqueBottomRight)
            opaqueData.append(d);
        else
            translucentData.append(d);
    }
 
    // horizontal edges
    if (targetCenterWidth > 0 && sourceCenterWidth > 0) {
        if (targetMargins.top() > 0 && sourceMargins.top() > 0) { // top
            QPixmapFragmentsArray &data = hints & QDrawBorderPixmap::OpaqueTop ? opaqueData : translucentData;
            d.sourceLeft = sourceCenterLeft;
            d.sourceTop = sourceRect.top();
            d.width = sourceCenterWidth;
            d.height = sourceMargins.top();
            d.y = (0.5 * (yTarget[1] + yTarget[0]));
            d.scaleX = dx / d.width;
            d.scaleY = qreal(yTarget[1] - yTarget[0]) / d.height;
            for (int i = 1; i < columns - 1; ++i) {
                d.x = (0.5 * (xTarget[i + 1] + xTarget[i]));
                data.append(d);
            }
            if (rules.horizontal == Qt::RepeatTile)
                data[data.size() - 1].width = ((xTarget[columns - 1] - xTarget[columns - 2]) / d.scaleX);
        }
        if (targetMargins.bottom() > 0 && sourceMargins.bottom() > 0) { // bottom
            QPixmapFragmentsArray &data = hints & QDrawBorderPixmap::OpaqueBottom ? opaqueData : translucentData;
            d.sourceLeft = sourceCenterLeft;
            d.sourceTop = sourceCenterBottom;
            d.width = sourceCenterWidth;
            d.height = sourceMargins.bottom();
            d.y = (0.5 * (yTarget[rows] + yTarget[rows - 1]));
            d.scaleX = dx / d.width;
            d.scaleY = qreal(yTarget[rows] - yTarget[rows - 1]) / d.height;
            for (int i = 1; i < columns - 1; ++i) {
                d.x = (0.5 * (xTarget[i + 1] + xTarget[i]));
                data.append(d);
            }
            if (rules.horizontal == Qt::RepeatTile)
                data[data.size() - 1].width = ((xTarget[columns - 1] - xTarget[columns - 2]) / d.scaleX);
        }
    }
 
    // vertical edges
    if (targetCenterHeight > 0 && sourceCenterHeight > 0) {
        if (targetMargins.left() > 0 && sourceMargins.left() > 0) { // left
            QPixmapFragmentsArray &data = hints & QDrawBorderPixmap::OpaqueLeft ? opaqueData : translucentData;
            d.sourceLeft = sourceRect.left();
            d.sourceTop = sourceCenterTop;
            d.width = sourceMargins.left();
            d.height = sourceCenterHeight;
            d.x = (0.5 * (xTarget[1] + xTarget[0]));
            d.scaleX = qreal(xTarget[1] - xTarget[0]) / d.width;
            d.scaleY = dy / d.height;
            for (int i = 1; i < rows - 1; ++i) {
                d.y = (0.5 * (yTarget[i + 1] + yTarget[i]));
                data.append(d);
            }
            if (rules.vertical == Qt::RepeatTile)
                data[data.size() - 1].height = ((yTarget[rows - 1] - yTarget[rows - 2]) / d.scaleY);
        }
        if (targetMargins.right() > 0 && sourceMargins.right() > 0) { // right
            QPixmapFragmentsArray &data = hints & QDrawBorderPixmap::OpaqueRight ? opaqueData : translucentData;
            d.sourceLeft = sourceCenterRight;
            d.sourceTop = sourceCenterTop;
            d.width = sourceMargins.right();
            d.height = sourceCenterHeight;
            d.x = (0.5 * (xTarget[columns] + xTarget[columns - 1]));
            d.scaleX = qreal(xTarget[columns] - xTarget[columns - 1]) / d.width;
            d.scaleY = dy / d.height;
            for (int i = 1; i < rows - 1; ++i) {
                d.y = (0.5 * (yTarget[i + 1] + yTarget[i]));
                data.append(d);
            }
            if (rules.vertical == Qt::RepeatTile)
                data[data.size() - 1].height = ((yTarget[rows - 1] - yTarget[rows - 2]) / d.scaleY);
        }
    }
 
    // center
    if (targetCenterWidth > 0 && targetCenterHeight > 0 && sourceCenterWidth > 0 && sourceCenterHeight > 0) {
        QPixmapFragmentsArray &data = hints & QDrawBorderPixmap::OpaqueCenter ? opaqueData : translucentData;
        d.sourceLeft = sourceCenterLeft;
        d.sourceTop = sourceCenterTop;
        d.width = sourceCenterWidth;
        d.height = sourceCenterHeight;
        d.scaleX = dx / d.width;
        d.scaleY = dy / d.height;
 
        qreal repeatWidth = (xTarget[columns - 1] - xTarget[columns - 2]) / d.scaleX;
        qreal repeatHeight = (yTarget[rows - 1] - yTarget[rows - 2]) / d.scaleY;
 
        for (int j = 1; j < rows - 1; ++j) {
            d.y = (0.5 * (yTarget[j + 1] + yTarget[j]));
            for (int i = 1; i < columns - 1; ++i) {
                d.x = (0.5 * (xTarget[i + 1] + xTarget[i]));
                data.append(d);
            }
            if (rules.horizontal == Qt::RepeatTile)
                data[data.size() - 1].width = repeatWidth;
        }
        if (rules.vertical == Qt::RepeatTile) {
            for (int i = 1; i < columns - 1; ++i)
                data[data.size() - i].height = repeatHeight;
        }
    }
 
    if (opaqueData.size())
        painter->drawPixmapFragments(opaqueData.data(), opaqueData.size(), pixmap, QPainter::OpaqueHint);
    if (translucentData.size())
        painter->drawPixmapFragments(translucentData.data(), translucentData.size(), pixmap);
 
    if (oldAA)
        painter->setRenderHint(QPainter::Antialiasing, true);
}
 
QT_END_NAMESPACE