qprintengine_win.cpp

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// Copyright (C) 2020 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 <QtPrintSupport/qtprintsupportglobal.h>
 
#ifndef QT_NO_PRINTER
 
#include "qprintengine_win_p.h"
 
#include <limits.h>
 
#include <private/qprinter_p.h>
#include <private/qfont_p.h>
#include <private/qfontengine_p.h>
#include <private/qpainter_p.h>
#if QT_CONFIG(directwrite)
#  include <private/qwindowsfontenginedirectwrite_p.h>
#endif
 
#include <qpa/qplatformprintplugin.h>
#include <qpa/qplatformprintersupport.h>
 
#include <qbitmap.h>
#include <qdebug.h>
#include <qlist.h>
#include <qpicture.h>
#include <qpa/qplatformpixmap.h>
#include <private/qpicture_p.h>
#include <private/qpixmap_raster_p.h>
#include <QtCore/QMetaType>
#include <QtCore/qt_windows.h>
#include <QtGui/qpagelayout.h>
#include <QtGui/private/qpixmap_win_p.h>
 
QT_BEGIN_NAMESPACE
 
extern QPainterPath qt_regionToPath(const QRegion &region);
extern QMarginsF qt_convertMargins(const QMarginsF &margins, QPageLayout::Unit fromUnits, QPageLayout::Unit toUnits);
 
// #define QT_DEBUG_DRAW
// #define QT_DEBUG_METRICS
 
static void draw_text_item_win(const QPointF &_pos, const QTextItemInt &ti, HDC hdc,
                               const QTransform &xform, const QPointF &topLeft);
 
QWin32PrintEngine::QWin32PrintEngine(QPrinter::PrinterMode mode, const QString &deviceId)
    : QAlphaPaintEngine(*(new QWin32PrintEnginePrivate),
                   PaintEngineFeatures(PrimitiveTransform
                                       | PixmapTransform
                                       | PerspectiveTransform
                                       | PainterPaths
                                       | Antialiasing
                                       | PaintOutsidePaintEvent))
{
    Q_D(QWin32PrintEngine);
    d->mode = mode;
    QPlatformPrinterSupport *ps = QPlatformPrinterSupportPlugin::get();
    if (ps)
        d->m_printDevice = ps->createPrintDevice(deviceId.isEmpty() ? ps->defaultPrintDeviceId() : deviceId);
    d->m_pageLayout.setPageSize(d->m_printDevice.defaultPageSize());
    d->initialize();
}
 
static QByteArray msgBeginFailed(const char *function, const DOCINFO &d)
{
    QString result;
    QTextStream str(&result);
    str << "QWin32PrintEngine::begin: " << function << " failed";
    if (d.lpszDocName && d.lpszDocName[0])
       str << ", document \"" << QString::fromWCharArray(d.lpszDocName) << '"';
    if (d.lpszOutput && d.lpszOutput[0])
        str << ", file \"" << QString::fromWCharArray(d.lpszOutput) << '"';
    return std::move(result).toLocal8Bit();
}
 
bool QWin32PrintEngine::begin(QPaintDevice *pdev)
{
    Q_D(QWin32PrintEngine);
 
    QAlphaPaintEngine::begin(pdev);
    if (!continueCall())
        return true;
 
    if (d->reinit) {
       d->resetDC();
       d->reinit = false;
    }
 
    // ### set default colors and stuff...
 
    bool ok = d->state == QPrinter::Idle;
 
    if (!d->hdc)
        return false;
 
    d->devMode->dmCopies = d->num_copies;
 
    DOCINFO di;
    memset(&di, 0, sizeof(DOCINFO));
    di.cbSize = sizeof(DOCINFO);
    if (d->docName.isEmpty())
        di.lpszDocName = L"document1";
    else
        di.lpszDocName = reinterpret_cast<const wchar_t *>(d->docName.utf16());
    if (d->printToFile && !d->fileName.isEmpty())
        di.lpszOutput = reinterpret_cast<const wchar_t *>(d->fileName.utf16());
    if (d->printToFile)
        di.lpszOutput = d->fileName.isEmpty() ? L"FILE:" : reinterpret_cast<const wchar_t *>(d->fileName.utf16());
    if (ok && StartDoc(d->hdc, &di) == SP_ERROR) {
        qErrnoWarning(msgBeginFailed("StartDoc", di));
        ok = false;
    }
 
    if (StartPage(d->hdc) <= 0) {
        qErrnoWarning(msgBeginFailed("StartPage", di));
        ok = false;
    }
 
    if (!ok) {
        d->state = QPrinter::Idle;
    } else {
        d->state = QPrinter::Active;
    }
 
    d->matrix = QTransform();
    d->has_pen = true;
    d->pen = QColor(Qt::black);
    d->has_brush = false;
 
    d->complex_xform = false;
 
    updateMatrix(d->matrix);
 
    if (!ok)
        cleanUp();
 
#ifdef QT_DEBUG_METRICS
    qDebug("QWin32PrintEngine::begin()");
    d->debugMetrics();
#endif // QT_DEBUG_METRICS
 
    return ok;
}
 
bool QWin32PrintEngine::end()
{
    Q_D(QWin32PrintEngine);
 
    if (d->hdc) {
        if (d->state == QPrinter::Aborted) {
            cleanUp();
            AbortDoc(d->hdc);
            return true;
        }
    }
 
    QAlphaPaintEngine::end();
    if (!continueCall())
        return true;
 
    if (d->hdc) {
        if (EndPage(d->hdc) <= 0) // end; printing done
            qErrnoWarning("QWin32PrintEngine::end: EndPage failed (%p)", d->hdc);
        if (EndDoc(d->hdc) <= 0)
            qErrnoWarning("QWin32PrintEngine::end: EndDoc failed");
    }
 
    d->state = QPrinter::Idle;
    d->reinit = true;
    return true;
}
 
bool QWin32PrintEngine::newPage()
{
    Q_D(QWin32PrintEngine);
    Q_ASSERT(isActive());
 
    Q_ASSERT(d->hdc);
 
    flushAndInit();
 
    bool transparent = GetBkMode(d->hdc) == TRANSPARENT;
 
    if (EndPage(d->hdc) <= 0) {
        qErrnoWarning("QWin32PrintEngine::newPage: EndPage failed");
        return false;
    }
 
    if (d->reinit) {
        if (!d->resetDC())
            return false;
        d->reinit = false;
    }
 
    if (StartPage(d->hdc) <= 0) {
        qErrnoWarning("Win32PrintEngine::newPage: StartPage failed");
        return false;
    }
 
    SetTextAlign(d->hdc, TA_BASELINE);
    if (transparent)
        SetBkMode(d->hdc, TRANSPARENT);
 
#ifdef QT_DEBUG_METRICS
    qDebug("QWin32PrintEngine::newPage()");
    d->debugMetrics();
#endif // QT_DEBUG_METRICS
 
    // ###
    return true;
 
    bool success = false;
    if (d->hdc && d->state == QPrinter::Active) {
        if (EndPage(d->hdc) > 0) {
            // reinitialize the DC before StartPage if needed,
            // because resetdc is disabled between calls to the StartPage and EndPage functions
            // (see StartPage documentation in the Platform SDK:Windows GDI)
//          state = PST_ACTIVEDOC;
//          reinit();
//          state = PST_ACTIVE;
            // start the new page now
            if (d->reinit) {
                if (!d->resetDC())
                    qErrnoWarning("QWin32PrintEngine::newPage(), ResetDC failed (2)");
                d->reinit = false;
            }
            success = (StartPage(d->hdc) > 0);
            if (!success)
                qErrnoWarning("Win32PrintEngine::newPage: StartPage failed (2)");
        }
        if (!success) {
            d->state = QPrinter::Aborted;
            return false;
        }
    }
    return true;
}
 
bool QWin32PrintEngine::abort()
{
    // do nothing loop.
    return false;
}
 
void QWin32PrintEngine::drawTextItem(const QPointF &p, const QTextItem &textItem)
{
    Q_D(const QWin32PrintEngine);
 
    QAlphaPaintEngine::drawTextItem(p, textItem);
    if (!continueCall())
        return;
 
    const QTextItemInt &ti = static_cast<const QTextItemInt &>(textItem);
    QRgb brushColor = state->pen().brush().color().rgb();
    bool fallBack = state->pen().brush().style() != Qt::SolidPattern
                    || qAlpha(brushColor) != 0xff
                    || d->txop >= QTransform::TxProject
                    || !d->embed_fonts;
 
    if (!fallBack) {
        bool deleteFont = false;
        HFONT hfont = NULL;
        if (ti.fontEngine->type() == QFontEngine::Win) {
            hfont = static_cast<HFONT>(ti.fontEngine->handle());
        }
#if QT_CONFIG(directwrite)
        else if (ti.fontEngine->type() == QFontEngine::DirectWrite) {
            QWindowsFontEngineDirectWrite *fedw = static_cast<QWindowsFontEngineDirectWrite *>(ti.fontEngine);
            hfont = fedw->createHFONT();
            if (hfont)
                deleteFont = true;
        }
#endif
 
        if (hfont) {
            // Try selecting the font to see if we get a substitution font
            SelectObject(d->hdc, hfont);
            if (GetDeviceCaps(d->hdc, TECHNOLOGY) != DT_CHARSTREAM) {
                LOGFONT logFont;
                GetObject(hfont, sizeof(LOGFONT), &logFont);
 
                wchar_t n[64];
                GetTextFace(d->hdc, 64, n);
                fallBack = QString::fromWCharArray(n)
                    != QString::fromWCharArray(logFont.lfFaceName);
 
                if (deleteFont)
                    DeleteObject(hfont);
            }
        } else {
            fallBack = true;
        }
    }
 
 
    if (fallBack) {
        QPaintEngine::drawTextItem(p, textItem);
        return ;
    }
 
    COLORREF cf = RGB(qRed(brushColor), qGreen(brushColor), qBlue(brushColor));
    SelectObject(d->hdc, CreateSolidBrush(cf));
    SelectObject(d->hdc, CreatePen(PS_SOLID, 1, cf));
    SetTextColor(d->hdc, cf);
 
    draw_text_item_win(p, ti, d->hdc, d->matrix, QPointF(0.0, 0.0));
    DeleteObject(SelectObject(d->hdc,GetStockObject(HOLLOW_BRUSH)));
    DeleteObject(SelectObject(d->hdc,GetStockObject(BLACK_PEN)));
}
 
int QWin32PrintEngine::metric(QPaintDevice::PaintDeviceMetric m) const
{
    Q_D(const QWin32PrintEngine);
 
    if (!d->hdc)
        return 0;
 
    int val;
    int res = d->resolution;
 
    switch (m) {
    case QPaintDevice::PdmWidth:
        val = d->m_paintRectPixels.width();
#ifdef QT_DEBUG_METRICS
    qDebug() << "QWin32PrintEngine::metric(PdmWidth) = " << val;
    d->debugMetrics();
#endif // QT_DEBUG_METRICS
        break;
    case QPaintDevice::PdmHeight:
        val = d->m_paintRectPixels.height();
#ifdef QT_DEBUG_METRICS
    qDebug() << "QWin32PrintEngine::metric(PdmHeight) = " << val;
    d->debugMetrics();
#endif // QT_DEBUG_METRICS
        break;
    case QPaintDevice::PdmDpiX:
        val = res;
        break;
    case QPaintDevice::PdmDpiY:
        val = res;
        break;
    case QPaintDevice::PdmPhysicalDpiX:
        val = GetDeviceCaps(d->hdc, LOGPIXELSX);
        break;
    case QPaintDevice::PdmPhysicalDpiY:
        val = GetDeviceCaps(d->hdc, LOGPIXELSY);
        break;
    case QPaintDevice::PdmWidthMM:
        val = d->m_paintSizeMM.width();
#ifdef QT_DEBUG_METRICS
    qDebug() << "QWin32PrintEngine::metric(PdmWidthMM) = " << val;
    d->debugMetrics();
#endif // QT_DEBUG_METRICS
        break;
    case QPaintDevice::PdmHeightMM:
        val = d->m_paintSizeMM.height();
#ifdef QT_DEBUG_METRICS
    qDebug() << "QWin32PrintEngine::metric(PdmHeightMM) = " << val;
    d->debugMetrics();
#endif // QT_DEBUG_METRICS
        break;
    case QPaintDevice::PdmNumColors:
        {
            int bpp = GetDeviceCaps(d->hdc, BITSPIXEL);
            if (bpp==32)
                val = INT_MAX;
            else if (bpp<=8)
                val = GetDeviceCaps(d->hdc, NUMCOLORS);
            else
                val = 1 << (bpp * GetDeviceCaps(d->hdc, PLANES));
        }
        break;
    case QPaintDevice::PdmDepth:
        val = GetDeviceCaps(d->hdc, PLANES);
        break;
    case QPaintDevice::PdmDevicePixelRatio:
        val = 1;
        break;
    case QPaintDevice::PdmDevicePixelRatioScaled:
        val = 1 * QPaintDevice::devicePixelRatioFScale();
        break;
    default:
        qWarning("QPrinter::metric: Invalid metric command");
        return 0;
    }
    return val;
}
 
void QWin32PrintEngine::updateState(const QPaintEngineState &state)
{
    Q_D(QWin32PrintEngine);
 
    QAlphaPaintEngine::updateState(state);
    if (!continueCall())
        return;
 
    if (state.state() & DirtyTransform) {
        updateMatrix(state.transform());
    }
 
    if (state.state() & DirtyPen) {
        d->pen = state.pen();
        d->has_pen = d->pen.style() != Qt::NoPen && d->pen.isSolid();
    }
 
    if (state.state() & DirtyBrush) {
        QBrush brush = state.brush();
        d->has_brush = brush.style() == Qt::SolidPattern;
        d->brush_color = brush.color();
    }
 
    if (state.state() & DirtyClipEnabled) {
        if (state.isClipEnabled())
            updateClipPath(painter()->clipPath(), Qt::ReplaceClip);
        else
            updateClipPath(QPainterPath(), Qt::NoClip);
    }
 
    if (state.state() & DirtyClipPath) {
        updateClipPath(state.clipPath(), state.clipOperation());
    }
 
    if (state.state() & DirtyClipRegion) {
        QRegion clipRegion = state.clipRegion();
        QPainterPath clipPath = qt_regionToPath(clipRegion);
        updateClipPath(clipPath, state.clipOperation());
    }
}
 
void QWin32PrintEngine::updateClipPath(const QPainterPath &clipPath, Qt::ClipOperation op)
{
    Q_D(QWin32PrintEngine);
 
    bool doclip = true;
    if (op == Qt::NoClip) {
        SelectClipRgn(d->hdc, 0);
        doclip = false;
    }
 
    if (doclip) {
        QPainterPath xformed = clipPath * d->matrix;
 
        if (xformed.isEmpty()) {
//            QRegion empty(-0x1000000, -0x1000000, 1, 1);
            HRGN empty = CreateRectRgn(-0x1000000, -0x1000000, -0x0fffffff, -0x0ffffff);
            SelectClipRgn(d->hdc, empty);
            DeleteObject(empty);
        } else {
            d->composeGdiPath(xformed);
            const int ops[] = {
                -1,         // Qt::NoClip, covered above
                RGN_COPY,   // Qt::ReplaceClip
                RGN_AND,    // Qt::IntersectClip
                RGN_OR      // Qt::UniteClip
            };
            Q_ASSERT(op > 0 && unsigned(op) <= sizeof(ops) / sizeof(int));
            SelectClipPath(d->hdc, ops[op]);
        }
    }
 
    QPainterPath aclip = qt_regionToPath(alphaClipping());
    if (!aclip.isEmpty()) {
        QTransform tx(d->stretch_x, 0, 0, d->stretch_y, d->origin_x, d->origin_y);
        d->composeGdiPath(tx.map(aclip));
        SelectClipPath(d->hdc, RGN_DIFF);
    }
}
 
void QWin32PrintEngine::updateMatrix(const QTransform &m)
{
    Q_D(QWin32PrintEngine);
 
    QTransform stretch(d->stretch_x, 0, 0, d->stretch_y, d->origin_x, d->origin_y);
    d->painterMatrix = m;
    d->matrix = d->painterMatrix * stretch;
    d->txop = d->matrix.type();
    d->complex_xform = (d->txop > QTransform::TxScale);
}
 
enum HBitmapFormat
{
    HBitmapNoAlpha,
    HBitmapPremultipliedAlpha,
    HBitmapAlpha
};
 
void QWin32PrintEngine::drawPixmap(const QRectF &targetRect,
                                   const QPixmap &originalPixmap,
                                   const QRectF &sourceRect)
{
    Q_D(QWin32PrintEngine);
 
    QAlphaPaintEngine::drawPixmap(targetRect, originalPixmap, sourceRect);
    if (!continueCall())
        return;
 
    const int tileSize = 2048;
 
    QRectF r = targetRect;
    QRectF sr = sourceRect;
 
    QPixmap pixmap = originalPixmap;
    if (sr.size() != pixmap.size()) {
        pixmap = pixmap.copy(sr.toRect());
    }
 
    qreal scaleX = 1.0f;
    qreal scaleY = 1.0f;
 
    QTransform scaleMatrix = QTransform::fromScale(r.width() / pixmap.width(), r.height() / pixmap.height());
    QTransform adapted = QPixmap::trueMatrix(d->painterMatrix * scaleMatrix,
                                             pixmap.width(), pixmap.height());
 
    qreal xform_offset_x = adapted.dx();
    qreal xform_offset_y = adapted.dy();
 
    if (d->complex_xform) {
        pixmap = pixmap.transformed(adapted);
        scaleX = d->stretch_x;
        scaleY = d->stretch_y;
    } else {
        scaleX = d->stretch_x * (r.width() / pixmap.width()) * d->painterMatrix.m11();
        scaleY = d->stretch_y * (r.height() / pixmap.height()) * d->painterMatrix.m22();
    }
 
    QPointF topLeft = r.topLeft() * d->painterMatrix;
    int tx = int(topLeft.x() * d->stretch_x + d->origin_x);
    int ty = int(topLeft.y() * d->stretch_y + d->origin_y);
    int tw = qAbs(int(pixmap.width() * scaleX));
    int th = qAbs(int(pixmap.height() * scaleY));
 
    xform_offset_x *= d->stretch_x;
    xform_offset_y *= d->stretch_y;
 
    int dc_state = SaveDC(d->hdc);
 
    int tilesw = pixmap.width() / tileSize;
    int tilesh = pixmap.height() / tileSize;
    ++tilesw;
    ++tilesh;
 
    int txinc = tileSize*scaleX;
    int tyinc = tileSize*scaleY;
 
    for (int y = 0; y < tilesh; ++y) {
        int tposy = ty + (y * tyinc);
        int imgh = tileSize;
        int height = tyinc;
        if (y == (tilesh - 1)) {
            imgh = pixmap.height() - (y * tileSize);
            height = (th - (y * tyinc));
        }
        for (int x = 0; x < tilesw; ++x) {
            int tposx = tx + (x * txinc);
            int imgw = tileSize;
            int width = txinc;
            if (x == (tilesw - 1)) {
                imgw = pixmap.width() - (x * tileSize);
                width = (tw - (x * txinc));
            }
 
 
            QImage img(QSize(imgw, imgh), QImage::Format_RGB32);
            img.setDevicePixelRatio(pixmap.devicePixelRatio());
            img.fill(Qt::white);
            QPainter painter(&img);
            painter.drawPixmap(0,0, pixmap, tileSize * x, tileSize * y, imgw, imgh);
            QPixmap p = QPixmap::fromImage(img);
 
            HBITMAP hbitmap = qt_pixmapToWinHBITMAP(p, HBitmapNoAlpha);
            HDC hbitmap_hdc = CreateCompatibleDC(d->hdc);
            HGDIOBJ null_bitmap = SelectObject(hbitmap_hdc, hbitmap);
 
            if (!StretchBlt(d->hdc, qRound(tposx - xform_offset_x), qRound(tposy - xform_offset_y), width, height,
                            hbitmap_hdc, 0, 0, p.width(), p.height(), SRCCOPY))
                qErrnoWarning("QWin32PrintEngine::drawPixmap, StretchBlt failed");
 
            SelectObject(hbitmap_hdc, null_bitmap);
            DeleteObject(hbitmap);
            DeleteDC(hbitmap_hdc);
        }
    }
 
    RestoreDC(d->hdc, dc_state);
}
 
 
void QWin32PrintEngine::drawTiledPixmap(const QRectF &r, const QPixmap &pm, const QPointF &pos)
{
    Q_D(QWin32PrintEngine);
 
    QAlphaPaintEngine::drawTiledPixmap(r, pm, pos);
    if (!continueCall())
        return;
 
    if (d->complex_xform || !pos.isNull()) {
        QPaintEngine::drawTiledPixmap(r, pm, pos);
    } else {
        int dc_state = SaveDC(d->hdc);
 
        HBITMAP hbitmap = qt_pixmapToWinHBITMAP(pm, HBitmapNoAlpha);
        HDC hbitmap_hdc = CreateCompatibleDC(d->hdc);
        HGDIOBJ null_bitmap = SelectObject(hbitmap_hdc, hbitmap);
 
        QRectF trect = d->painterMatrix.mapRect(r);
        int tx = int(trect.left() * d->stretch_x + d->origin_x);
        int ty = int(trect.top() * d->stretch_y + d->origin_y);
 
        int xtiles = int(trect.width() / pm.width()) + 1;
        int ytiles = int(trect.height() / pm.height()) + 1;
        int xinc = int(pm.width() * d->stretch_x);
        int yinc = int(pm.height() * d->stretch_y);
 
        for (int y = 0; y < ytiles; ++y) {
            int ity = ty + (yinc * y);
            int ith = pm.height();
            if (y == (ytiles - 1)) {
                ith = int(trect.height() - (pm.height() * y));
            }
 
            for (int x = 0; x < xtiles; ++x) {
                int itx = tx + (xinc * x);
                int itw = pm.width();
                if (x == (xtiles - 1)) {
                    itw = int(trect.width() - (pm.width() * x));
                }
 
                if (!StretchBlt(d->hdc, itx, ity, int(itw * d->stretch_x), int(ith * d->stretch_y),
                                hbitmap_hdc, 0, 0, itw, ith, SRCCOPY))
                    qErrnoWarning("QWin32PrintEngine::drawPixmap, StretchBlt failed");
 
            }
        }
 
        SelectObject(hbitmap_hdc, null_bitmap);
        DeleteObject(hbitmap);
        DeleteDC(hbitmap_hdc);
 
        RestoreDC(d->hdc, dc_state);
    }
}
 
 
void QWin32PrintEnginePrivate::composeGdiPath(const QPainterPath &path)
{
    if (!BeginPath(hdc))
        qErrnoWarning("QWin32PrintEnginePrivate::drawPath: BeginPath failed");
 
    // Drawing the subpaths
    int start = -1;
    for (int i=0; i<path.elementCount(); ++i) {
        const QPainterPath::Element &elm = path.elementAt(i);
        switch (elm.type) {
        case QPainterPath::MoveToElement:
            if (start >= 0
                && path.elementAt(start).x == path.elementAt(i-1).x
                && path.elementAt(start).y == path.elementAt(i-1).y)
                CloseFigure(hdc);
            start = i;
            MoveToEx(hdc, qRound(elm.x), qRound(elm.y), 0);
            break;
        case QPainterPath::LineToElement:
            LineTo(hdc, qRound(elm.x), qRound(elm.y));
            break;
        case QPainterPath::CurveToElement: {
            POINT pts[3] = {
                { qRound(elm.x), qRound(elm.y) },
                { qRound(path.elementAt(i+1).x), qRound(path.elementAt(i+1).y) },
                { qRound(path.elementAt(i+2).x), qRound(path.elementAt(i+2).y) }
            };
            i+=2;
            PolyBezierTo(hdc, pts, 3);
            break;
        }
        default:
            qFatal("QWin32PaintEngine::drawPath: Unhandled type: %d", elm.type);
        }
    }
 
    if (start >= 0
        && path.elementAt(start).x == path.elementAt(path.elementCount()-1).x
        && path.elementAt(start).y == path.elementAt(path.elementCount()-1).y)
        CloseFigure(hdc);
 
    if (!EndPath(hdc))
        qErrnoWarning("QWin32PaintEngine::drawPath: EndPath failed");
 
    SetPolyFillMode(hdc, path.fillRule() == Qt::WindingFill ? WINDING : ALTERNATE);
}
 
 
void QWin32PrintEnginePrivate::fillPath_dev(const QPainterPath &path, const QColor &color)
{
#ifdef QT_DEBUG_DRAW
    qDebug() << " --- QWin32PrintEnginePrivate::fillPath() bound:" << path.boundingRect() << color;
#endif
 
    composeGdiPath(path);
 
    HBRUSH brush = CreateSolidBrush(RGB(color.red(), color.green(), color.blue()));
    HGDIOBJ old_brush = SelectObject(hdc, brush);
    FillPath(hdc);
    DeleteObject(SelectObject(hdc, old_brush));
}
 
void QWin32PrintEnginePrivate::strokePath_dev(const QPainterPath &path, const QColor &color, qreal penWidth)
{
    composeGdiPath(path);
    LOGBRUSH brush;
    brush.lbStyle = BS_SOLID;
    brush.lbColor = RGB(color.red(), color.green(), color.blue());
    DWORD capStyle = PS_ENDCAP_SQUARE;
    DWORD joinStyle = PS_JOIN_BEVEL;
    if (pen.capStyle() == Qt::FlatCap)
        capStyle = PS_ENDCAP_FLAT;
    else if (pen.capStyle() == Qt::RoundCap)
        capStyle = PS_ENDCAP_ROUND;
 
    if (pen.joinStyle() == Qt::MiterJoin)
        joinStyle = PS_JOIN_MITER;
    else if (pen.joinStyle() == Qt::RoundJoin)
        joinStyle = PS_JOIN_ROUND;
 
    HPEN pen = ExtCreatePen(PS_GEOMETRIC | PS_SOLID | capStyle | joinStyle,
                            (penWidth == 0) ? 1 : penWidth, &brush, 0, 0);
 
    HGDIOBJ old_pen = SelectObject(hdc, pen);
    StrokePath(hdc);
    DeleteObject(SelectObject(hdc, old_pen));
}
 
 
void QWin32PrintEnginePrivate::fillPath(const QPainterPath &path, const QColor &color)
{
    fillPath_dev(path * matrix, color);
}
 
void QWin32PrintEnginePrivate::strokePath(const QPainterPath &path, const QColor &color)
{
    QPainterPathStroker stroker;
    if (pen.style() == Qt::CustomDashLine) {
        stroker.setDashPattern(pen.dashPattern());
        stroker.setDashOffset(pen.dashOffset());
    } else {
        stroker.setDashPattern(pen.style());
    }
    stroker.setCapStyle(pen.capStyle());
    stroker.setJoinStyle(pen.joinStyle());
    stroker.setMiterLimit(pen.miterLimit());
 
    QPainterPath stroke;
    qreal width = pen.widthF();
    bool cosmetic = pen.isCosmetic();
    if (pen.style() == Qt::SolidLine && (cosmetic || matrix.type() < QTransform::TxScale)) {
        strokePath_dev(path * matrix, color, width);
    } else {
        stroker.setWidth(width);
        if (cosmetic) {
            stroke = stroker.createStroke(path * matrix);
        } else {
            stroke = stroker.createStroke(path) * painterMatrix;
            QTransform stretch(stretch_x, 0, 0, stretch_y, origin_x, origin_y);
            stroke = stroke * stretch;
        }
 
        if (stroke.isEmpty())
            return;
 
        fillPath_dev(stroke, color);
    }
}
 
 
void QWin32PrintEngine::drawPath(const QPainterPath &path)
{
#ifdef QT_DEBUG_DRAW
    qDebug() << " - QWin32PrintEngine::drawPath(), bounds: " << path.boundingRect();
#endif
 
    Q_D(QWin32PrintEngine);
 
    QAlphaPaintEngine::drawPath(path);
    if (!continueCall())
        return;
 
    if (d->has_brush)
        d->fillPath(path, d->brush_color);
 
    if (d->has_pen)
        d->strokePath(path, d->pen.color());
}
 
 
void QWin32PrintEngine::drawPolygon(const QPointF *points, int pointCount, PolygonDrawMode mode)
{
#ifdef QT_DEBUG_DRAW
    qDebug() << " - QWin32PrintEngine::drawPolygon(), pointCount: " << pointCount;
#endif
 
    QAlphaPaintEngine::drawPolygon(points, pointCount, mode);
    if (!continueCall())
        return;
 
    Q_ASSERT(pointCount > 1);
 
    QPainterPath path(points[0]);
 
    for (int i=1; i<pointCount; ++i) {
        path.lineTo(points[i]);
    }
 
    Q_D(QWin32PrintEngine);
 
    bool has_brush = d->has_brush;
 
    if (mode == PolylineMode)
        d->has_brush = false; // No brush for polylines
    else
        path.closeSubpath(); // polygons are should always be closed.
 
    drawPath(path);
    d->has_brush = has_brush;
}
 
QWin32PrintEnginePrivate::~QWin32PrintEnginePrivate()
{
    release();
}
 
void QWin32PrintEnginePrivate::initialize()
{
    release();
 
    Q_ASSERT(!hPrinter);
    Q_ASSERT(!hdc);
    Q_ASSERT(!devMode);
    Q_ASSERT(!pInfo);
 
    if (!m_printDevice.isValid())
        return;
 
    txop = QTransform::TxNone;
 
    QString printerName = m_printDevice.id();
    bool ok = OpenPrinter((LPWSTR)printerName.utf16(), (LPHANDLE)&hPrinter, 0);
    if (!ok) {
        qErrnoWarning("QWin32PrintEngine::initialize: OpenPrinter failed");
        return;
    }
 
    // Fetch the PRINTER_INFO_2 with DEVMODE data containing the
    // printer settings.
    DWORD infoSize, numBytes;
    GetPrinter(hPrinter, 2, NULL, 0, &infoSize);
    hMem = GlobalAlloc(GHND, infoSize);
    pInfo = (PRINTER_INFO_2*) GlobalLock(hMem);
    ok = GetPrinter(hPrinter, 2, (LPBYTE)pInfo, infoSize, &numBytes);
 
    if (!ok) {
        qErrnoWarning("QWin32PrintEngine::initialize: GetPrinter failed");
        release();
        return;
    }
 
    devMode = pInfo->pDevMode;
 
    if (!devMode) {
        // pInfo->pDevMode == NULL for some printers and passing NULL
        // into CreateDC leads to the printer doing nothing.  In addition,
        // the framework assumes that devMode isn't NULL, such as in
        // QWin32PrintEngine::begin() and QPageSetupDialog::exec()
        // Attempt to get the DEVMODE a different way.
 
        // Allocate the required buffer
        LONG result = DocumentProperties(NULL, hPrinter, (LPWSTR)printerName.utf16(),
                                         NULL, NULL, 0);
        devMode = (DEVMODE *) malloc(result);
        ownsDevMode = true;
 
         // Get the default DevMode
        result = DocumentProperties(NULL, hPrinter, (LPWSTR)printerName.utf16(),
                                    devMode, NULL, DM_OUT_BUFFER);
        if (result != IDOK) {
            qErrnoWarning("QWin32PrintEngine::initialize: Failed to obtain devMode");
            free(devMode);
            devMode = NULL;
            ownsDevMode = false;
        }
    }
 
    hdc = CreateDC(NULL, (LPCWSTR)printerName.utf16(), 0, devMode);
 
    if (!hdc) {
        qErrnoWarning("QWin32PrintEngine::initialize: CreateDC failed");
        release();
        return;
    }
 
    Q_ASSERT(hPrinter);
    Q_ASSERT(pInfo);
 
    initHDC();
 
    if (devMode) {
        num_copies = devMode->dmCopies;
        devMode->dmCollate = DMCOLLATE_TRUE;
        updatePageLayout();
    }
 
#if defined QT_DEBUG_DRAW || defined QT_DEBUG_METRICS
    qDebug("QWin32PrintEngine::initialize()");
    debugMetrics();
#endif // QT_DEBUG_DRAW || QT_DEBUG_METRICS
}
 
void QWin32PrintEnginePrivate::initHDC()
{
    Q_ASSERT(hdc);
 
    HDC display_dc = GetDC(0);
    dpi_x = GetDeviceCaps(hdc, LOGPIXELSX);
    dpi_y = GetDeviceCaps(hdc, LOGPIXELSY);
    dpi_display = GetDeviceCaps(display_dc, LOGPIXELSY);
    ReleaseDC(0, display_dc);
    if (dpi_display == 0) {
        qWarning("QWin32PrintEngine::metric: GetDeviceCaps() failed, "
                "might be a driver problem");
        dpi_display = 96; // Reasonable default
    }
 
    switch(mode) {
    case QPrinter::ScreenResolution:
        resolution = dpi_display;
        stretch_x = dpi_x / double(dpi_display);
        stretch_y = dpi_y / double(dpi_display);
        break;
    case QPrinter::PrinterResolution:
    case QPrinter::HighResolution:
        resolution = dpi_y;
        stretch_x = 1;
        stretch_y = 1;
        break;
    default:
        break;
    }
 
    updateMetrics();
}
 
void QWin32PrintEnginePrivate::release()
{
    if (globalDevMode) { // Devmode comes from print dialog
        GlobalUnlock(globalDevMode);
    } else if (hMem) {
        GlobalUnlock(hMem);
        GlobalFree(hMem);
    }
    if (hPrinter)
        ClosePrinter(hPrinter);
    if (hdc)
        DeleteDC(hdc);
 
    // Check if devMode was allocated separately from pInfo / hMem.
    if (ownsDevMode)
        free(devMode);
 
    hdc = 0;
    hPrinter = 0;
    pInfo = 0;
    hMem = 0;
    devMode = 0;
    ownsDevMode = false;
}
 
void QWin32PrintEnginePrivate::doReinit()
{
    if (state == QPrinter::Active) {
        reinit = true;
    } else {
        resetDC();
        reinit = false;
    }
}
 
bool QWin32PrintEnginePrivate::resetDC()
{
    if (!hdc) {
        qWarning("ResetDC() called with null hdc.");
        return false;
    }
    const HDC oldHdc = hdc;
    const HDC hdc = ResetDC(oldHdc, devMode);
    if (!hdc) {
        const int lastError = GetLastError();
        qErrnoWarning(lastError, "ResetDC() on %p failed (%d)", oldHdc, lastError);
    }
    return hdc != 0;
}
 
static int indexOfId(const QList<QPrint::InputSlot> &inputSlots, QPrint::InputSlotId id)
{
    for (int i = 0; i < inputSlots.size(); ++i) {
        if (inputSlots.at(i).id == id)
            return i;
    }
    return -1;
}
 
static int indexOfWindowsId(const QList<QPrint::InputSlot> &inputSlots, int windowsId)
{
    for (int i = 0; i < inputSlots.size(); ++i) {
        if (inputSlots.at(i).windowsId == windowsId)
            return i;
    }
    return -1;
}
 
void QWin32PrintEngine::setProperty(PrintEnginePropertyKey key, const QVariant &value)
{
    Q_D(QWin32PrintEngine);
    switch (key) {
 
    // The following keys are properties or derived values and so cannot be set
    case PPK_PageRect:
        break;
    case PPK_PaperRect:
        break;
    case PPK_PaperSources:
        break;
    case PPK_SupportsMultipleCopies:
        break;
    case PPK_SupportedResolutions:
        break;
 
    // The following keys are settings that are unsupported by the Windows PrintEngine
    case PPK_CustomBase:
        break;
    case PPK_PageOrder:
        break;
    case PPK_PrinterProgram:
        break;
    case PPK_SelectionOption:
        break;
 
    // The following keys are properties and settings that are supported by the Windows PrintEngine
    case PPK_FontEmbedding:
        d->embed_fonts = value.toBool();
        break;
 
    case PPK_CollateCopies:
        {
            if (!d->devMode)
                break;
            d->devMode->dmCollate = value.toBool() ? DMCOLLATE_TRUE : DMCOLLATE_FALSE;
            d->doReinit();
        }
        break;
 
    case PPK_ColorMode:
        {
            if (!d->devMode)
                break;
            d->devMode->dmColor = (value.toInt() == QPrinter::Color) ? DMCOLOR_COLOR : DMCOLOR_MONOCHROME;
            d->doReinit();
        }
        break;
 
    case PPK_Creator:
        d->m_creator = value.toString();
        break;
 
    case PPK_DocumentName:
        if (isActive()) {
            qWarning("QWin32PrintEngine: Cannot change document name while printing is active");
            return;
        }
        d->docName = value.toString();
        break;
 
    case PPK_Duplex: {
        if (!d->devMode)
            break;
        QPrint::DuplexMode mode = QPrint::DuplexMode(value.toInt());
        if (mode == property(PPK_Duplex).toInt() || !d->m_printDevice.supportedDuplexModes().contains(mode))
            break;
        switch (mode) {
        case QPrint::DuplexNone:
            d->devMode->dmDuplex = DMDUP_SIMPLEX;
            break;
        case QPrint::DuplexAuto:
            d->devMode->dmDuplex = d->m_pageLayout.orientation() == QPageLayout::Landscape ? DMDUP_HORIZONTAL : DMDUP_VERTICAL;
            break;
        case QPrint::DuplexLongSide:
            d->devMode->dmDuplex = DMDUP_VERTICAL;
            break;
        case QPrint::DuplexShortSide:
            d->devMode->dmDuplex = DMDUP_HORIZONTAL;
            break;
        default:
            // Don't change
            break;
        }
        d->doReinit();
        break;
    }
 
    case PPK_FullPage:
        if (value.toBool())
            d->m_pageLayout.setMode(QPageLayout::FullPageMode);
        else
            d->m_pageLayout.setMode(QPageLayout::StandardMode);
        d->updateMetrics();
#ifdef QT_DEBUG_METRICS
        qDebug() << "QWin32PrintEngine::setProperty(PPK_FullPage," << value.toBool() << + ")";
        d->debugMetrics();
#endif // QT_DEBUG_METRICS
        break;
 
    case PPK_CopyCount:
    case PPK_NumberOfCopies:
        if (!d->devMode)
            break;
        d->num_copies = value.toInt();
        d->devMode->dmCopies = d->num_copies;
        d->doReinit();
        break;
 
    case PPK_Orientation: {
        if (!d->devMode)
            break;
        QPageLayout::Orientation orientation = QPageLayout::Orientation(value.toInt());
        d->devMode->dmOrientation = orientation == QPageLayout::Landscape ? DMORIENT_LANDSCAPE : DMORIENT_PORTRAIT;
        d->m_pageLayout.setOrientation(orientation);
        d->updateMetrics();
        d->doReinit();
#ifdef QT_DEBUG_METRICS
        qDebug() << "QWin32PrintEngine::setProperty(PPK_Orientation," << orientation << ')';
        d->debugMetrics();
#endif // QT_DEBUG_METRICS
        break;
    }
 
    case PPK_OutputFileName:
        if (isActive()) {
            qWarning("QWin32PrintEngine: Cannot change filename while printing");
        } else {
            d->fileName = value.toString();
            d->printToFile = !value.toString().isEmpty();
        }
        break;
 
    case PPK_PageSize: {
        if (!d->devMode)
            break;
        const QPageSize pageSize = QPageSize(QPageSize::PageSizeId(value.toInt()));
        if (pageSize.isValid()) {
            d->setPageSize(pageSize);
            d->doReinit();
#ifdef QT_DEBUG_METRICS
            qDebug() << "QWin32PrintEngine::setProperty(PPK_PageSize," << value.toInt() << ')';
            d->debugMetrics();
#endif // QT_DEBUG_METRICS
        }
        break;
    }
 
    case PPK_PaperName: {
        if (!d->devMode)
            break;
        // Get the named page size from the printer if supported
        const QPageSize pageSize = d->m_printDevice.supportedPageSize(value.toString());
        if (pageSize.isValid()) {
            d->setPageSize(pageSize);
            d->doReinit();
#ifdef QT_DEBUG_METRICS
            qDebug() << "QWin32PrintEngine::setProperty(PPK_PaperName," << value.toString() << ')';
            d->debugMetrics();
#endif // QT_DEBUG_METRICS
        }
        break;
    }
 
    case PPK_PaperSource: {
        if (!d->devMode)
            break;
        const auto inputSlots = d->m_printDevice.supportedInputSlots();
        const int paperSource = value.toInt();
        const int index = paperSource >= DMBIN_USER ?
            indexOfWindowsId(inputSlots, paperSource) : indexOfId(inputSlots, QPrint::InputSlotId(paperSource));
        d->devMode->dmDefaultSource = index >= 0 ? inputSlots.at(index).windowsId : DMBIN_AUTO;
        d->doReinit();
        break;
    }
 
    case PPK_PrinterName: {
        QString id = value.toString();
        QPlatformPrinterSupport *ps = QPlatformPrinterSupportPlugin::get();
        if (!ps)
            return;
 
        QVariant pageSize = QVariant::fromValue(d->m_pageLayout.pageSize());
        const bool isFullPage = (d->m_pageLayout.mode() == QPageLayout::FullPageMode);
        QVariant orientation = QVariant::fromValue(d->m_pageLayout.orientation());
        QVariant margins = QVariant::fromValue(
            QPair<QMarginsF, QPageLayout::Unit>(d->m_pageLayout.margins(), d->m_pageLayout.units()));
        QPrintDevice printDevice = ps->createPrintDevice(id.isEmpty() ? ps->defaultPrintDeviceId() : id);
        if (printDevice.isValid()) {
            d->m_printDevice = printDevice;
            d->initialize();
            if (d->m_printDevice.supportedPageSize(pageSize.value<QPageSize>()).isValid())
                setProperty(PPK_QPageSize, pageSize);
            else
                setProperty(PPK_CustomPaperSize, pageSize.value<QPageSize>().size(QPageSize::Point));
            setProperty(PPK_FullPage, QVariant(isFullPage));
            setProperty(PPK_Orientation, orientation);
            setProperty(PPK_QPageMargins, margins);
        }
        break;
    }
 
    case PPK_Resolution: {
        d->resolution = value.toInt();
        d->stretch_x = d->dpi_x / double(d->resolution);
        d->stretch_y = d->dpi_y / double(d->resolution);
        d->updateMetrics();
#ifdef QT_DEBUG_METRICS
        qDebug() << "QWin32PrintEngine::setProperty(PPK_Resolution," << value.toInt() << ')';
        d->debugMetrics();
#endif // QT_DEBUG_METRICS
        break;
    }
 
    case PPK_WindowsPageSize: {
        if (!d->devMode)
            break;
        const QPageSize pageSize = QPageSize(QPageSize::id(value.toInt()));
        if (pageSize.isValid()) {
            d->setPageSize(pageSize);
            d->doReinit();
#ifdef QT_DEBUG_METRICS
            qDebug() << "QWin32PrintEngine::setProperty(PPK_WindowsPageSize," << value.toInt() << ')';
            d->debugMetrics();
#endif // QT_DEBUG_METRICS
            break;
        }
        break;
    }
 
    case PPK_CustomPaperSize: {
        if (!d->devMode)
            break;
        const QPageSize pageSize = QPageSize(value.toSizeF(), QPageSize::Point);
        if (pageSize.isValid()) {
            d->setPageSize(pageSize);
            d->doReinit();
#ifdef QT_DEBUG_METRICS
            qDebug() << "QWin32PrintEngine::setProperty(PPK_CustomPaperSize," << value.toSizeF() << ')';
            d->debugMetrics();
#endif // QT_DEBUG_METRICS
        }
        break;
    }
 
    case PPK_PageMargins: {
        QList<QVariant> margins(value.toList());
        Q_ASSERT(margins.size() == 4);
        d->m_pageLayout.setUnits(QPageLayout::Point);
        d->m_pageLayout.setMargins(QMarginsF(margins.at(0).toReal(), margins.at(1).toReal(),
                                             margins.at(2).toReal(), margins.at(3).toReal()));
        d->updateMetrics();
#ifdef QT_DEBUG_METRICS
        qDebug() << "QWin32PrintEngine::setProperty(PPK_PageMargins," << margins << ')';
        d->debugMetrics();
#endif // QT_DEBUG_METRICS
        break;
    }
 
    case PPK_QPageSize: {
        if (!d->devMode)
            break;
        // Get the page size from the printer if supported
        const QPageSize pageSize = value.value<QPageSize>();
        if (pageSize.isValid()) {
            d->setPageSize(pageSize);
            d->doReinit();
#ifdef QT_DEBUG_METRICS
            qDebug() << "QWin32PrintEngine::setProperty(PPK_QPageSize," << pageSize << ')';
            d->debugMetrics();
#endif // QT_DEBUG_METRICS
        }
        break;
    }
 
    case PPK_QPageMargins: {
        QPair<QMarginsF, QPageLayout::Unit> pair = value.value<QPair<QMarginsF, QPageLayout::Unit> >();
        d->m_pageLayout.setUnits(pair.second);
        d->m_pageLayout.setMargins(pair.first);
        d->updateMetrics();
#ifdef QT_DEBUG_METRICS
        qDebug() << "QWin32PrintEngine::setProperty(PPK_QPageMargins," << pair.first << pair.second << ')';
        d->debugMetrics();
#endif // QT_DEBUG_METRICS
        break;
    }
 
    case PPK_QPageLayout: {
        QPageLayout pageLayout = value.value<QPageLayout>();
        if (pageLayout.isValid() && d->m_printDevice.isValidPageLayout(pageLayout, d->resolution)) {
            setProperty(PPK_QPageSize, QVariant::fromValue(pageLayout.pageSize()));
            setProperty(PPK_FullPage, pageLayout.mode() == QPageLayout::FullPageMode);
            setProperty(PPK_Orientation, QVariant::fromValue(pageLayout.orientation()));
            d->m_pageLayout.setUnits(pageLayout.units());
            d->m_pageLayout.setMargins(pageLayout.margins());
            d->updateMetrics();
#ifdef QT_DEBUG_METRICS
            qDebug() << "QWin32PrintEngine::setProperty(PPK_QPageLayout," << pageLayout << ')';
            d->debugMetrics();
#endif // QT_DEBUG_METRICS
        }
        break;
    }
 
    // No default so that compiler will complain if new keys added and not handled in this engine
    }
}
 
QVariant QWin32PrintEngine::property(PrintEnginePropertyKey key) const
{
    Q_D(const QWin32PrintEngine);
    QVariant value;
    switch (key) {
 
    // The following keys are settings that are unsupported by the Windows PrintEngine
    // Return sensible default values to ensure consistent behavior across platforms
    case PPK_PageOrder:
        value = QPrinter::FirstPageFirst;
        break;
    case PPK_PrinterProgram:
        value = QString();
        break;
    case PPK_SelectionOption:
        value = QString();
        break;
 
    // The following keys are properties and settings that are supported by the Windows PrintEngine
    case PPK_FontEmbedding:
        value = d->embed_fonts;
        break;
 
    case PPK_CollateCopies:
        if (!d->devMode)
            value = false;
        else
            value = d->devMode->dmCollate == DMCOLLATE_TRUE;
        break;
 
    case PPK_ColorMode:
        {
            if (!d->devMode) {
                value = QPrinter::Color;
            } else {
                value = (d->devMode->dmColor == DMCOLOR_COLOR) ? QPrinter::Color : QPrinter::GrayScale;
            }
        }
        break;
 
    case PPK_Creator:
        value = d->m_creator;
        break;
 
    case PPK_DocumentName:
        value = d->docName;
        break;
 
    case PPK_Duplex: {
        if (!d->devMode) {
            value = QPrinter::DuplexNone;
        } else {
            switch (d->devMode->dmDuplex) {
            case DMDUP_VERTICAL:
                value = QPrinter::DuplexLongSide;
                break;
            case DMDUP_HORIZONTAL:
                value = QPrinter::DuplexShortSide;
                break;
            case DMDUP_SIMPLEX:
            default:
                value = QPrinter::DuplexNone;
                break;
            }
        }
        break;
    }
 
    case PPK_FullPage:
        value =  d->m_pageLayout.mode() == QPageLayout::FullPageMode;
        break;
 
    case PPK_CopyCount:
        value = d->num_copies;
        break;
 
    case PPK_SupportsMultipleCopies:
        value = true;
        break;
 
    case PPK_NumberOfCopies:
        value = 1;
        break;
 
    case PPK_Orientation:
        value = d->m_pageLayout.orientation();
        break;
 
    case PPK_OutputFileName:
        value = d->fileName;
        break;
 
    case PPK_PageRect:
        // PageRect is returned in device pixels
        value = d->m_pageLayout.paintRectPixels(d->resolution);
        break;
 
    case PPK_PageSize:
        value = d->m_pageLayout.pageSize().id();
        break;
 
    case PPK_PaperRect:
        // PaperRect is returned in device pixels
        value = d->m_pageLayout.fullRectPixels(d->resolution);
        break;
 
    case PPK_PaperName:
        value = d->m_pageLayout.pageSize().name();
        break;
 
    case PPK_PaperSource:
        if (!d->devMode) {
            value = d->m_printDevice.defaultInputSlot().id;
        } else {
            if (d->devMode->dmDefaultSource >= DMBIN_USER) {
                value = int(d->devMode->dmDefaultSource);
            } else {
                const auto inputSlots = d->m_printDevice.supportedInputSlots();
                const int index = indexOfWindowsId(inputSlots, d->devMode->dmDefaultSource);
                value = index >= 0 ? inputSlots.at(index).id : QPrint::Auto;
            }
        }
        break;
 
    case PPK_PrinterName:
        value = d->m_printDevice.id();
        break;
 
    case PPK_Resolution:
        if (d->resolution || d->m_printDevice.isValid())
            value = d->resolution;
        break;
 
    case PPK_SupportedResolutions: {
        QList<QVariant> list;
        const auto resolutions = d->m_printDevice.supportedResolutions();
        list.reserve(resolutions.size());
        for (int resolution : resolutions)
            list << resolution;
        value = list;
        break;
    }
 
    case PPK_WindowsPageSize:
        value = d->m_pageLayout.pageSize().windowsId();
        break;
 
    case PPK_PaperSources: {
        QList<QVariant> out;
        const auto inputSlots = d->m_printDevice.supportedInputSlots();
        out.reserve(inputSlots.size());
        for (const QPrint::InputSlot &inputSlot : inputSlots)
            out << QVariant(inputSlot.id == QPrint::CustomInputSlot ? inputSlot.windowsId : int(inputSlot.id));
        value = out;
        break;
    }
 
    case PPK_CustomPaperSize:
        value = d->m_pageLayout.fullRectPoints().size();
        break;
 
    case PPK_PageMargins: {
        QList<QVariant> list;
        QMarginsF margins = d->m_pageLayout.margins(QPageLayout::Point);
        list << margins.left() << margins.top() << margins.right() << margins.bottom();
        value = list;
        break;
    }
 
    case PPK_QPageSize:
        value.setValue(d->m_pageLayout.pageSize());
        break;
 
    case PPK_QPageMargins: {
        QPair<QMarginsF, QPageLayout::Unit> pair = qMakePair(d->m_pageLayout.margins(), d->m_pageLayout.units());
        value.setValue(pair);
        break;
    }
 
    case PPK_QPageLayout:
        value.setValue(d->m_pageLayout);
        break;
 
    case PPK_CustomBase:
        break;
 
    // No default so that compiler will complain if new keys added and not handled in this engine
    }
    return value;
}
 
QPrinter::PrinterState QWin32PrintEngine::printerState() const
{
    return d_func()->state;
}
 
HDC QWin32PrintEngine::getDC() const
{
    return d_func()->hdc;
}
 
void QWin32PrintEngine::releaseDC(HDC) const
{
 
}
 
HGLOBAL *QWin32PrintEngine::createGlobalDevNames()
{
    Q_D(QWin32PrintEngine);
 
    const size_t size = sizeof(DEVNAMES) + d->m_printDevice.id().length() * 2 + 2;
    auto hGlobal = reinterpret_cast<HGLOBAL *>(GlobalAlloc(GMEM_MOVEABLE, size));
    auto dn = reinterpret_cast<DEVNAMES*>(GlobalLock(hGlobal));
 
    dn->wDriverOffset = 0;
    dn->wDeviceOffset = sizeof(DEVNAMES) / sizeof(wchar_t);
    dn->wOutputOffset = 0;
 
    memcpy(reinterpret_cast<ushort*>(dn) + dn->wDeviceOffset,
           d->m_printDevice.id().utf16(), d->m_printDevice.id().length() * 2 + 2);
    dn->wDefault = 0;
 
    GlobalUnlock(hGlobal);
    return hGlobal;
}
 
void QWin32PrintEngine::setGlobalDevMode(HGLOBAL globalDevNames, HGLOBAL globalDevMode)
{
    Q_D(QWin32PrintEngine);
    if (globalDevNames) {
        auto dn = reinterpret_cast<DEVNAMES*>(GlobalLock(globalDevNames));
        const QString id =
            QString::fromWCharArray(reinterpret_cast<const wchar_t*>(dn) + dn->wDeviceOffset);
        QPlatformPrinterSupport *ps = QPlatformPrinterSupportPlugin::get();
        if (ps)
            d->m_printDevice = ps->createPrintDevice(id.isEmpty() ? ps->defaultPrintDeviceId() : id);
        GlobalUnlock(globalDevNames);
    }
 
    if (globalDevMode) {
        auto dm = reinterpret_cast<DEVMODE*>(GlobalLock(globalDevMode));
        d->release();
        d->globalDevMode = globalDevMode;
        if (d->ownsDevMode) {
            free(d->devMode);
            d->ownsDevMode = false;
        }
        d->devMode = dm;
        d->hdc = CreateDC(NULL, reinterpret_cast<const wchar_t *>(d->m_printDevice.id().utf16()), 0, dm);
 
        d->num_copies = d->devMode->dmCopies;
        d->updatePageLayout();
 
        if (!OpenPrinter((wchar_t*)d->m_printDevice.id().utf16(), &d->hPrinter, 0))
            qWarning("QPrinter: OpenPrinter() failed after reading DEVMODE.");
    }
 
    if (d->hdc)
        d->initHDC();
 
#if defined QT_DEBUG_DRAW || defined QT_DEBUG_METRICS
    qDebug("QWin32PrintEngine::setGlobalDevMode()");
    d->debugMetrics();
#endif // QT_DEBUG_DRAW || QT_DEBUG_METRICS
}
 
HGLOBAL QWin32PrintEngine::globalDevMode()
{
    Q_D(QWin32PrintEngine);
    return d->globalDevMode;
}
 
void QWin32PrintEnginePrivate::setPageSize(const QPageSize &pageSize)
{
    if (!pageSize.isValid())
        return;
 
    Q_ASSERT(devMode);
 
    // Use the printer page size if supported
    const QPageSize printerPageSize = m_printDevice.supportedPageSize(pageSize);
    const QPageSize usePageSize = printerPageSize.isValid() ? printerPageSize : pageSize;
 
    const QMarginsF printable = m_printDevice.printableMargins(usePageSize, m_pageLayout.orientation(), resolution);
    m_pageLayout.setPageSize(usePageSize, qt_convertMargins(printable, QPageLayout::Point, m_pageLayout.units()));
 
    // Setup if Windows custom size, i.e. not a known Windows ID
    if (printerPageSize.isValid()) {
        has_custom_paper_size = false;
        devMode->dmPaperSize = m_pageLayout.pageSize().windowsId();
        devMode->dmFields &= ~(DM_PAPERLENGTH | DM_PAPERWIDTH);
        devMode->dmPaperWidth = 0;
        devMode->dmPaperLength = 0;
    } else {
        devMode->dmPaperSize = DMPAPER_USER;
        devMode->dmFields |= DM_PAPERLENGTH | DM_PAPERWIDTH;
        // Size in tenths of a millimeter
        const QSizeF sizeMM = m_pageLayout.pageSize().size(QPageSize::Millimeter);
        devMode->dmPaperWidth = qRound(sizeMM.width() * 10.0);
        devMode->dmPaperLength = qRound(sizeMM.height() * 10.0);
    }
    updateMetrics();
}
 
// Update the page layout after any changes made to devMode
void QWin32PrintEnginePrivate::updatePageLayout()
{
    Q_ASSERT(devMode);
 
    // Update orientation first as is needed to obtain printable margins when changing page size
    m_pageLayout.setOrientation(devMode->dmOrientation == DMORIENT_LANDSCAPE ? QPageLayout::Landscape : QPageLayout::Portrait);
    if (devMode->dmPaperSize >= DMPAPER_LAST) {
        // Is a custom size
        // Check if it is using the Postscript Custom Size first
        bool hasCustom = false;
        int feature = PSIDENT_GDICENTRIC;
        if (ExtEscape(hdc, POSTSCRIPT_IDENTIFY,
                      sizeof(DWORD), reinterpret_cast<LPCSTR>(&feature), 0, 0) >= 0) {
            PSFEATURE_CUSTPAPER custPaper;
            feature = FEATURESETTING_CUSTPAPER;
            if (ExtEscape(hdc, GET_PS_FEATURESETTING, sizeof(INT), reinterpret_cast<LPCSTR>(&feature),
                          sizeof(custPaper), reinterpret_cast<LPSTR>(&custPaper)) > 0) {
                // If orientation is 1 and width/height is 0 then it's not really custom
                if (!(custPaper.lOrientation == 1 && custPaper.lWidth == 0 && custPaper.lHeight == 0)) {
                    if (custPaper.lOrientation == 0 || custPaper.lOrientation == 2)
                        m_pageLayout.setOrientation(QPageLayout::Portrait);
                    else
                        m_pageLayout.setOrientation(QPageLayout::Landscape);
                    QPageSize pageSize = QPageSize(QSizeF(custPaper.lWidth, custPaper.lHeight),
                                                   QPageSize::Point);
                    setPageSize(pageSize);
                    hasCustom = true;
                }
            }
        }
        if (!hasCustom) {
            QPageSize pageSize = QPageSize(QSizeF(devMode->dmPaperWidth / 10.0f, devMode->dmPaperLength / 10.0f),
                                           QPageSize::Millimeter);
            setPageSize(pageSize);
        }
    } else {
        // Is a supported size
        setPageSize(QPageSize(QPageSize::id(devMode->dmPaperSize)));
    }
    updateMetrics();
}
 
// Update the cached page paint metrics whenever page layout is changed
void QWin32PrintEnginePrivate::updateMetrics()
{
    m_paintRectPixels = m_pageLayout.paintRectPixels(resolution);
    // Some print devices allow scaling, so that "virtual" page size != current paper size
    const int devWidth = GetDeviceCaps(hdc, PHYSICALWIDTH);
    const int devHeight = GetDeviceCaps(hdc, PHYSICALHEIGHT);
    const int pageWidth = m_pageLayout.fullRectPixels(dpi_x).width();
    const int pageHeight = m_pageLayout.fullRectPixels(dpi_y).height();
    const qreal pageScaleX = (devWidth && pageWidth) ? qreal(devWidth) / pageWidth : 1;
    const qreal pageScaleY = (devHeight && pageHeight) ? qreal(devHeight) / pageHeight : 1;
    m_paintRectPixels = QTransform::fromScale(pageScaleX, pageScaleY).mapRect(m_paintRectPixels);
 
    QSizeF sizeMM = m_pageLayout.paintRect(QPageLayout::Millimeter).size();
    m_paintSizeMM = QSize(qRound(sizeMM.width()), qRound(sizeMM.height()));
    // Calculate the origin using the physical device pixels, not our paint pixels
    // Origin is defined as User Margins - Device Margins
    QMarginsF margins = m_pageLayout.margins(QPageLayout::Millimeter) / 25.4;
    origin_x = qRound(pageScaleX * margins.left() * dpi_x) - GetDeviceCaps(hdc, PHYSICALOFFSETX);
    origin_y = qRound(pageScaleY * margins.top() * dpi_y) - GetDeviceCaps(hdc, PHYSICALOFFSETY);
}
 
void QWin32PrintEnginePrivate::debugMetrics() const
{
    qDebug() << "    " << "m_pageLayout      = " << m_pageLayout;
    qDebug() << "    " << "m_paintRectPixels = " << m_paintRectPixels;
    qDebug() << "    " << "m_paintSizeMM     = " << m_paintSizeMM;
    qDebug() << "    " << "resolution        = " << resolution;
    qDebug() << "    " << "stretch           = " << stretch_x << stretch_y;
    qDebug() << "    " << "origin            = " << origin_x << origin_y;
    qDebug() << "    " << "dpi               = " << dpi_x << dpi_y;
    qDebug() << "";
}
 
static void draw_text_item_win(const QPointF &pos, const QTextItemInt &ti, HDC hdc,
                               const QTransform &xform, const QPointF &topLeft)
{
    QPointF baseline_pos = xform.inverted().map(xform.map(pos) - topLeft);
 
    SetTextAlign(hdc, TA_BASELINE);
    SetBkMode(hdc, TRANSPARENT);
 
    const bool has_kerning = ti.f && ti.f->kerning();
 
    HFONT hfont = 0;
    bool deleteFont = false;
 
    if (ti.fontEngine->type() == QFontEngine::Win) {
        if (ti.fontEngine->supportsTransformation(QTransform::fromScale(0.5, 0.5))) // is TrueType font?
            hfont = static_cast<HFONT>(ti.fontEngine->handle());
    }
#if QT_CONFIG(directwrite)
    else if (ti.fontEngine->type() == QFontEngine::DirectWrite) {
        QWindowsFontEngineDirectWrite *fedw = static_cast<QWindowsFontEngineDirectWrite *>(ti.fontEngine);
        hfont = fedw->createHFONT();
        if (hfont)
            deleteFont = true;
    }
#endif
 
    if (!hfont)
        hfont = (HFONT)GetStockObject(ANSI_VAR_FONT);
 
    HGDIOBJ old_font = SelectObject(hdc, hfont);
    unsigned int options = ETO_GLYPH_INDEX;
    QGlyphLayout glyphs = ti.glyphs;
 
    bool fast = !has_kerning && !(ti.flags & QTextItem::RightToLeft);
    for (int i = 0; fast && i < glyphs.numGlyphs; i++) {
        if (glyphs.offsets[i].x != 0 || glyphs.offsets[i].y != 0 || glyphs.justifications[i].space_18d6 != 0
            || glyphs.attributes[i].dontPrint) {
            fast = false;
            break;
        }
    }
 
    // Scale, rotate and translate here.
    XFORM win_xform;
    win_xform.eM11 = xform.m11();
    win_xform.eM12 = xform.m12();
    win_xform.eM21 = xform.m21();
    win_xform.eM22 = xform.m22();
    win_xform.eDx = xform.dx();
    win_xform.eDy = xform.dy();
 
    SetGraphicsMode(hdc, GM_ADVANCED);
    SetWorldTransform(hdc, &win_xform);
 
    if (fast) {
        // fast path
        QVarLengthArray<wchar_t> g(glyphs.numGlyphs);
        for (int i = 0; i < glyphs.numGlyphs; ++i)
            g[i] = glyphs.glyphs[i];
        ExtTextOut(hdc,
                   qRound(baseline_pos.x() + glyphs.offsets[0].x.toReal()),
                   qRound(baseline_pos.y() + glyphs.offsets[0].y.toReal()),
                   options, 0, g.constData(), glyphs.numGlyphs, 0);
    } else {
        QVarLengthArray<QFixedPoint> positions;
        QVarLengthArray<glyph_t> _glyphs;
 
        QTransform matrix = QTransform::fromTranslate(baseline_pos.x(), baseline_pos.y());
        ti.fontEngine->getGlyphPositions(ti.glyphs, matrix, ti.flags,
            _glyphs, positions);
        if (_glyphs.isEmpty()) {
            SelectObject(hdc, old_font);
            return;
        }
 
        options |= ETO_PDY;
        QVarLengthArray<INT> glyphDistances(_glyphs.size() * 2);
        QVarLengthArray<wchar_t> g(_glyphs.size());
        const int lastGlyph = _glyphs.size() - 1;
        for (int i = 0; i < lastGlyph; ++i) {
            glyphDistances[i * 2] = qRound(positions[i + 1].x) - qRound(positions[i].x);
            glyphDistances[i * 2 + 1] = qRound(positions[i + 1].y) - qRound(positions[i].y);
            g[i] = _glyphs[i];
        }
        glyphDistances[lastGlyph * 2] = 0;
        glyphDistances[lastGlyph * 2 + 1] = 0;
        g[lastGlyph] = _glyphs[lastGlyph];
        ExtTextOut(hdc, qRound(positions[0].x), qRound(positions[0].y), options, nullptr,
                   g.constData(), _glyphs.size(),
                   glyphDistances.data());
    }
 
        win_xform.eM11 = win_xform.eM22 = 1.0;
        win_xform.eM12 = win_xform.eM21 = win_xform.eDx = win_xform.eDy = 0.0;
        SetWorldTransform(hdc, &win_xform);
 
    SelectObject(hdc, old_font);
 
    if (deleteFont)
        DeleteObject(hfont);
}
 
QT_END_NAMESPACE
 
#endif // QT_NO_PRINTER