qpaintengine_pic.cpp

奇趣公司比较新的qt/emd版本

    SERIALIZE_CMD(QPicturePrivate::PdcSetBkColor);
    d->s << bgBrush.color();
    writeCmdLength(pos, QRect(), false);

    SERIALIZE_CMD(QPicturePrivate::PdcSetBkMode);
    d->s << (qint8) bgMode;
    writeCmdLength(pos, QRectF(), false);
}

void QPicturePaintEngine::updateMatrix(const QTransform &matrix)
{
    Q_D(QPicturePaintEngine);
#ifdef QT_PICTURE_DEBUG
    qDebug() << " -> updateMatrix():" << matrix;
#endif
    int pos;
    SERIALIZE_CMD(QPicturePrivate::PdcSetWMatrix);
    d->s << matrix << (qint8) false;
    writeCmdLength(pos, QRectF(), false);
}

void QPicturePaintEngine::updateClipRegion(const QRegion &region, Qt::ClipOperation op)
{
    Q_D(QPicturePaintEngine);
#ifdef QT_PICTURE_DEBUG
    qDebug() << " -> updateClipRegion(): op:" << op
             << "bounding rect:" << region.boundingRect();
#endif
    int pos;
    SERIALIZE_CMD(QPicturePrivate::PdcSetClipRegion);
    d->s << region << qint8(op);
    writeCmdLength(pos, QRectF(), false);
}

void QPicturePaintEngine::updateClipPath(const QPainterPath &path, Qt::ClipOperation op)
{
    Q_D(QPicturePaintEngine);
#ifdef QT_PICTURE_DEBUG
    qDebug() << " -> updateClipPath(): op:" << op
             << "bounding rect:" << path.boundingRect();
#endif
    int pos;

    SERIALIZE_CMD(QPicturePrivate::PdcSetClipPath);
    d->s << path << qint8(op);
    writeCmdLength(pos, QRectF(), false);
}

void QPicturePaintEngine::updateRenderHints(QPainter::RenderHints hints)
{
    Q_D(QPicturePaintEngine);
#ifdef QT_PICTURE_DEBUG
    qDebug() << " -> updateRenderHints(): " << hints;
#endif
    int pos;
    SERIALIZE_CMD(QPicturePrivate::PdcSetRenderHint);
    d->s << (quint32) hints;
    writeCmdLength(pos, QRect(), false);
}

void QPicturePaintEngine::writeCmdLength(int pos, const QRectF &r, bool corr)
{
    Q_D(QPicturePaintEngine);
    int newpos = d->pic_d->pictb.pos();            // new position
    int length = newpos - pos;
    QRectF br(r);

    if (length < 255) {                         // write 8-bit length
        d->pic_d->pictb.seek(pos - 1);             // position to right index
        d->s << (quint8)length;
    } else {                                    // write 32-bit length
        d->s << (quint32)0;                    // extend the buffer
        d->pic_d->pictb.seek(pos - 1);             // position to right index
        d->s << (quint8)255;                   // indicate 32-bit length
        char *p = d->pic_d->pictb.buffer().data();
        memmove(p+pos+4, p+pos, length);        // make room for 4 byte
        d->s << (quint32)length;
        newpos += 4;
    }
    d->pic_d->pictb.seek(newpos);                  // set to new position

    if (br.width() > 0.0 || br.height() > 0.0) {
        if (corr) {                             // widen bounding rect
            int w2 = painter()->pen().width() / 2;
            br.setCoords(br.left() - w2, br.top() - w2,
                        br.right() + w2, br.bottom() + w2);
        }
        br = painter()->transform().mapRect(br);
        if (painter()->hasClipping()) {
            QRect cr = painter()->clipRegion().boundingRect();
            br &= cr;
        }

        if (br.width() > 0.0 || br.height() > 0.0) {
            int minx = qFloor(br.left());
            int miny = qFloor(br.top());
            int maxx = qCeil(br.right());
            int maxy = qCeil(br.bottom());

            if (d->pic_d->brect.width() > 0 || d->pic_d->brect.height() > 0) {
                minx = qMin(minx, d->pic_d->brect.left());
                miny = qMin(miny, d->pic_d->brect.top());
                maxx = qMax(maxx, d->pic_d->brect.x() + d->pic_d->brect.width());
                maxy = qMax(maxy, d->pic_d->brect.y() + d->pic_d->brect.height());
                d->pic_d->brect = QRect(minx, miny, maxx - minx, maxy - miny);
            } else {
                d->pic_d->brect = QRect(minx, miny, maxx - minx, maxy - miny);
            }
        }
    }
}

void QPicturePaintEngine::drawPath(const QPainterPath &path)
{
    Q_D(QPicturePaintEngine);
#ifdef QT_PICTURE_DEBUG
    qDebug() << " -> drawPath():" << path.boundingRect();
#endif
    int pos;
    SERIALIZE_CMD(QPicturePrivate::PdcDrawPath);
    d->s << path;
    writeCmdLength(pos, path.boundingRect(), true);
}

void QPicturePaintEngine::drawPolygon(const QPointF *points, int numPoints, PolygonDrawMode mode)
{
    Q_D(QPicturePaintEngine);
#ifdef QT_PICTURE_DEBUG
    qDebug() << " -> drawPolygon(): size=" << numPoints;
#endif
    int pos;

    QPolygonF polygon;
    for (int i=0; i<numPoints; ++i)
        polygon << points[i];

    if (mode == PolylineMode) {
        SERIALIZE_CMD(QPicturePrivate::PdcDrawPolyline);
        d->s << polygon;
    } else {
        SERIALIZE_CMD(QPicturePrivate::PdcDrawPolygon);
        d->s << polygon;
        d->s << (qint8)(mode == OddEvenMode ? 0 : 1);
    }

    writeCmdLength(pos, polygon.boundingRect(), true);
}

void QPicturePaintEngine::drawPixmap(const QRectF &r, const QPixmap &pm, const QRectF &sr)
{
    Q_D(QPicturePaintEngine);
#ifdef QT_PICTURE_DEBUG
    qDebug() << " -> drawPixmap():" << r;
#endif
    int pos;
    SERIALIZE_CMD(QPicturePrivate::PdcDrawPixmap);

    if (d->pic_d->dont_stream_pixmaps) {
        int index = d->pic_d->pixmap_list.size();
        d->pic_d->pixmap_list.append(pm);
        d->s << r << index << sr;
    } else {
        d->s << r << pm << sr;
    }
    writeCmdLength(pos, r, false);
}

void QPicturePaintEngine::drawTiledPixmap(const QRectF &r, const QPixmap &pixmap, const QPointF &s)
{
    Q_D(QPicturePaintEngine);
#ifdef QT_PICTURE_DEBUG
    qDebug() << " -> drawTiledPixmap():" << r << s;
#endif
    int pos;
    SERIALIZE_CMD(QPicturePrivate::PdcDrawTiledPixmap);
    if (d->pic_d->dont_stream_pixmaps) {
        int index = d->pic_d->pixmap_list.size();
        d->pic_d->pixmap_list.append(pixmap);
        d->s << r << index << s;
    } else {
        d->s << r << pixmap << s;
    }
    writeCmdLength(pos, r, false);
}

extern int qt_defaultDpi();

void QPicturePaintEngine::drawTextItem(const QPointF &p , const QTextItem &ti)
{
    Q_D(QPicturePaintEngine);
#ifdef QT_PICTURE_DEBUG
    qDebug() << " -> drawTextItem():" << p << ti.text();
#endif

    if (d->pic_d->formatMajor >= 9) {
        const QTextItemInt &si = static_cast<const QTextItemInt &>(ti);
        int pos;
        SERIALIZE_CMD(QPicturePrivate::PdcDrawTextItem);
        QFont fnt = ti.font();
        fnt.setUnderline(false);
        fnt.setStrikeOut(false);
        fnt.setOverline(false);

        qreal justificationWidth = 0;
        if (si.justified)
            justificationWidth = si.width.toReal();

        d->s << p << ti.text() << fnt << ti.renderFlags() << double(fnt.d->dpi)/qt_defaultDpi() << justificationWidth;
        writeCmdLength(pos, /*brect=*/QRectF(), /*corr=*/false);
    } else if (d->pic_d->formatMajor >= 8) {
        // old old (buggy) format
        int pos;
        SERIALIZE_CMD(QPicturePrivate::PdcDrawTextItem);
        d->s << QPointF(p.x(), p.y() - ti.ascent()) << ti.text() << ti.font() << ti.renderFlags();
        writeCmdLength(pos, /*brect=*/QRectF(), /*corr=*/false);
    } else {
        // old (buggy) format
        int pos;
        SERIALIZE_CMD(QPicturePrivate::PdcDrawText2);
        d->s << p << ti.text();
        writeCmdLength(pos, QRectF(p, QSizeF(1,1)), true);
    }
}

void QPicturePaintEngine::updateState(const QPaintEngineState &state)
{
    QPaintEngine::DirtyFlags flags = state.state();
    if (flags & DirtyPen) updatePen(state.pen());
    if (flags & DirtyBrush) updateBrush(state.brush());
    if (flags & DirtyBrushOrigin) updateBrushOrigin(state.brushOrigin());
    if (flags & DirtyFont) updateFont(state.font());
    if (flags & DirtyBackground) updateBackground(state.backgroundMode(), state.backgroundBrush());
    if (flags & DirtyTransform) updateMatrix(state.transform());
    if (flags & DirtyClipEnabled) updateClipEnabled(state.isClipEnabled());
    if (flags & DirtyClipRegion) updateClipRegion(state.clipRegion(), state.clipOperation());
    if (flags & DirtyClipPath) updateClipPath(state.clipPath(), state.clipOperation());
    if (flags & DirtyHints) updateRenderHints(state.renderHints());
    if (flags & DirtyCompositionMode) updateCompositionMode(state.compositionMode());
    if (flags & DirtyOpacity) updateOpacity(state.opacity());
}

#endif // QT_NO_PICTURE