qpaintengine_x11.cpp

qt-x11-opensource-src-4.1.4.tar.gz源码

        if (state.isClipEnabled()) {
            QPolygonF clip_poly_dev(d->matrix.map(painter()->clipPath().toFillPolygon()));
            QPolygonF clipped_poly_dev;
            d->clipPolygon_dev(clip_poly_dev, &clipped_poly_dev);
            updateClipRegion_dev(QRegion(clipped_poly_dev.toPolygon()), Qt::ReplaceClip);
        } else {
            updateClipRegion_dev(QRegion(), Qt::NoClip);
        }
    }

    if (flags & DirtyClipPath) {
        QPolygonF clip_poly_dev(d->matrix.map(state.clipPath().toFillPolygon()));
        QPolygonF clipped_poly_dev;
        d->clipPolygon_dev(clip_poly_dev, &clipped_poly_dev);
        updateClipRegion_dev(QRegion(clipped_poly_dev.toPolygon(), state.clipPath().fillRule()),
                             state.clipOperation());
    } else if (flags & DirtyClipRegion) {
        updateClipRegion_dev(d->matrix.map(state.clipRegion()), state.clipOperation());
    }
    if (flags & DirtyHints) updateRenderHints(state.renderHints());
#if !defined(QT_NO_XRENDER)
    if (flags & DirtyCompositionMode) {
        d->composition_mode =
            qpainterOpToXrender(state.compositionMode());
    }
#endif
    d->decidePathFallback();
}

void QX11PaintEngine::updateRenderHints(QPainter::RenderHints hints)
{
    Q_D(QX11PaintEngine);
    d->render_hints = hints;
    if ((d->txop > QPainterPrivate::TxTranslate)
        || (hints & QPainter::Antialiasing))
        d->use_path_fallback = true;
    else
        d->use_path_fallback = false;

#if !defined(QT_NO_XRENDER)
    if (X11->use_xrender && d->picture) {
        XRenderPictureAttributes attrs;
        attrs.poly_edge = (hints & QPainter::Antialiasing) ? PolyEdgeSmooth : PolyEdgeSharp;
        XRenderChangePicture(d->dpy, d->picture, CPPolyEdge, &attrs);
    }
#endif
}

void QX11PaintEngine::updatePen(const QPen &pen)
{
    Q_D(QX11PaintEngine);
    d->cpen = pen;
    int cp = CapButt;
    int jn = JoinMiter;
    int ps = pen.style();

    d->has_pen = (ps != Qt::NoPen);
    d->has_alpha_pen = (pen.color().alpha() != 255);

    switch (pen.capStyle()) {
    case Qt::SquareCap:
        cp = CapProjecting;
        break;
    case Qt::RoundCap:
        cp = CapRound;
        break;
    case Qt::FlatCap:
    default:
        cp = CapButt;
        break;
    }
    switch (pen.joinStyle()) {
    case Qt::BevelJoin:
        jn = JoinBevel;
        break;
    case Qt::RoundJoin:
        jn = JoinRound;
        break;
    case Qt::MiterJoin:
    default:
        jn = JoinMiter;
        break;
    }

    d->adapted_pen_origin = false;

    char dashes[10];                            // custom pen dashes
    int dash_len = 0;                           // length of dash list
    int xStyle = LineSolid;

    /*
      We are emulating Windows here.  Windows treats cpen.width() == 1
      (or 0) as a very special case.  The fudge variable unifies this
      case with the general case.
    */
    qreal pen_width = pen.widthF();
    int scale =  qRound(pen_width < 1 ? 1 : pen_width);
    int space = (pen_width < 1 ? 1 : (2 * scale));
    int dot = 1 * scale;
    int dash = 4 * scale;

    d->has_custom_pen = false;

    switch (ps) {
    case Qt::NoPen:
    case Qt::SolidLine:
        xStyle = LineSolid;
	break;
    case Qt::DashLine:
	dashes[0] = dash;
	dashes[1] = space;
	dash_len = 2;
        xStyle = LineOnOffDash;
	break;
    case Qt::DotLine:
	dashes[0] = dot;
	dashes[1] = space;
	dash_len = 2;
        xStyle = LineOnOffDash;
	break;
    case Qt::DashDotLine:
	dashes[0] = dash;
	dashes[1] = space;
	dashes[2] = dot;
	dashes[3] = space;
	dash_len = 4;
        xStyle = LineOnOffDash;
	break;
    case Qt::DashDotDotLine:
	dashes[0] = dash;
	dashes[1] = space;
	dashes[2] = dot;
	dashes[3] = space;
	dashes[4] = dot;
	dashes[5] = space;
	dash_len = 6;
        xStyle = LineOnOffDash;
        break;
    case Qt::CustomDashLine:
        d->has_custom_pen = true;
        break;
    }

    ulong mask = GCForeground | GCBackground | GCGraphicsExposures | GCLineWidth
                 | GCCapStyle | GCJoinStyle | GCLineStyle;
    XGCValues vals;
    vals.graphics_exposures = false;
    if (d->pdev_depth == 1) {
        vals.foreground = qGray(pen.color().rgb()) > 127 ? 0 : 1;
        vals.background = qGray(d->bg_col.rgb()) > 127 ? 0 : 1;
    } else if (d->pdev->devType() == QInternal::Pixmap && d->pdev_depth == 32
        && X11->use_xrender) {
        vals.foreground = pen.color().rgba();
        vals.background = d->bg_col.rgba();
    } else {
        QColormap cmap = QColormap::instance(d->scrn);
        vals.foreground = cmap.pixel(pen.color());
        vals.background = cmap.pixel(d->bg_col);
    }


    vals.line_width = qRound(pen.widthF());
    vals.cap_style = cp;
    vals.join_style = jn;
    vals.line_style = xStyle;

    XChangeGC(d->dpy, d->gc, mask, &vals);

    if (dash_len) { // make dash list
        XSetDashes(d->dpy, d->gc, 0, dashes, dash_len);
    }

    if (!d->has_clipping) { // if clipping is set the paintevent clip region is merged with the clip region
        QRegion sysClip = systemClip();
        if (!sysClip.isEmpty())
            x11SetClipRegion(d->dpy, d->gc, 0, d->picture, sysClip);
        else
            x11ClearClipRegion(d->dpy, d->gc, 0, d->picture);
    }
}

void QX11PaintEngine::updateBrush(const QBrush &brush, const QPointF &origin)
{
    Q_D(QX11PaintEngine);
    d->cbrush = brush;
    d->bg_origin = origin;
    d->adapted_brush_origin = false;
#if !defined(QT_NO_XRENDER)
    d->current_brush = 0;
#endif

    int s  = FillSolid;
    int  bs = d->cbrush.style();
    d->has_brush = (bs != Qt::NoBrush);
    d->has_pattern = bs >= Qt::Dense1Pattern && bs <= Qt::DiagCrossPattern;
    d->has_texture = bs == Qt::TexturePattern;
    d->has_alpha_brush = brush.color().alpha() != 255;

    ulong mask = GCForeground | GCBackground | GCGraphicsExposures
                 | GCLineStyle | GCCapStyle | GCJoinStyle | GCFillStyle;
    XGCValues vals;
    vals.graphics_exposures = false;
    if (d->pdev_depth == 1) {
        vals.foreground = qGray(d->cbrush.color().rgb()) > 127 ? 0 : 1;
        vals.background = qGray(d->bg_col.rgb()) > 127 ? 0 : 1;
    } else if (X11->use_xrender && d->pdev->devType() == QInternal::Pixmap
               && d->pdev_depth == 32) {
        vals.foreground = d->cbrush.color().rgba();
        vals.background = d->bg_col.rgba();
    } else {
        QColormap cmap = QColormap::instance(d->scrn);
        vals.foreground = cmap.pixel(d->cbrush.color());
        vals.background = cmap.pixel(d->bg_col);

        if (!d->has_pattern && !brush.isOpaque()) {
            QPixmap pattern = qt_patternForAlpha(brush.color().alpha());
            mask |= GCStipple;
            vals.stipple = pattern.handle();
            s = FillStippled;
            d->adapted_brush_origin = true;
        }
    }
    vals.cap_style = CapButt;
    vals.join_style = JoinMiter;
    vals.line_style = LineSolid;

    if (d->has_pattern || d->has_texture) {
        QPixmap pm;
        if (bs == Qt::TexturePattern) {
            pm = d->cbrush.texture();
#if !defined(QT_NO_XRENDER)
            if (X11->use_xrender) {
                XRenderPictureAttributes attrs;
                attrs.repeat = true;
                XRenderChangePicture(d->dpy, d->cbrush.texture().x11PictureHandle(), CPRepeat, &attrs);
            }
#endif
        } else {
            pm = qt_pixmapForBrush(bs, true);
        }
        pm.x11SetScreen(d->scrn);
        if (pm.depth() == 1) {
            mask |= GCStipple;
            vals.stipple = pm.handle();
            s = d->bg_mode == Qt::TransparentMode ? FillStippled : FillOpaqueStippled;
#if !defined(QT_NO_XRENDER)
            if (X11->use_xrender) {
                d->bitmap_texture = QPixmap(pm.size());

                if (d->bg_mode == Qt::OpaqueMode)
                    d->bitmap_texture.fill(d->bg_brush.color());
                else
                    d->bitmap_texture.fill(Qt::transparent);

                ::Picture src  = X11->getSolidFill(d->scrn, d->cbrush.color());
                XRenderComposite(d->dpy, PictOpSrc, src, pm.x11PictureHandle(),
                                 d->bitmap_texture.x11PictureHandle(),
                                 0, 0, pm.width(), pm.height(),
                                 0, 0, pm.width(), pm.height());

                XRenderPictureAttributes attrs;
                attrs.repeat = true;
                XRenderChangePicture(d->dpy, d->bitmap_texture.x11PictureHandle(), CPRepeat, &attrs);

                d->current_brush = d->bitmap_texture.x11PictureHandle();
            }
#endif
        } else {
            mask |= GCTile;
#ifndef QT_NO_XRENDER
            if (d->pdev_depth == 32 && pm.depth() != 32)
                pm.data->convertToARGB32();
#endif
            vals.tile = (pm.depth() == d->pdev_depth
                         ? pm.handle()
                         : pm.data->x11ConvertToDefaultDepth());
            s = FillTiled;
#if !defined(QT_NO_XRENDER)
            d->current_brush = d->cbrush.texture().x11PictureHandle();
#endif
        }

        mask |= GCTileStipXOrigin | GCTileStipYOrigin;
        vals.ts_x_origin = qRound(origin.x());
        vals.ts_y_origin = qRound(origin.y());
    }
#if !defined(QT_NO_XRENDER)
    else if (d->has_alpha_brush) {
        d->current_brush = X11->getSolidFill(d->scrn, d->cbrush.color());
    }
#endif

    vals.fill_style = s;
    XChangeGC(d->dpy, d->gc_brush, mask, &vals);
    if (!d->has_clipping) {
        QRegion sysClip = systemClip();
        if (!sysClip.isEmpty())
            x11SetClipRegion(d->dpy, d->gc_brush, 0, d->picture, sysClip);
        else
            x11ClearClipRegion(d->dpy, d->gc_brush, 0, d->picture);
    }
}

void QX11PaintEngine::drawEllipse(const QRect &rect)
{
    Q_D(QX11PaintEngine);
    QRect devclip(SHRT_MIN, SHRT_MIN, SHRT_MAX*2 - 1, SHRT_MAX*2 - 1);
    QRect r(rect);
    if (d->txop == QPainterPrivate::TxTranslate)
        r.translate(qRound(d->matrix.dx()), qRound(d->matrix.dy()));
    if (d->use_path_fallback || devclip.intersect(r) != r) {
        QPainterPath path;
        path.addEllipse(rect);
        drawPath(path);
        return;
    }

    int x = r.x();
    int y = r.y();
    int w = r.width();
    int h = r.height();
    if (w < 1 || h < 1)
        return;
    if (w == 1 && h == 1) {
        XDrawPoint(d->dpy, d->hd, d->has_pen ? d->gc : d->gc_brush, x, y);
        return;
    }
    d->setupAdaptedOrigin(rect.topLeft());
    if (d->has_brush) {          // draw filled ellipse
        if (!d->has_pen) {
            XFillArc(d->dpy, d->hd, d->gc_brush, x, y, w-1, h-1, 0, 360*64);
            XDrawArc(d->dpy, d->hd, d->gc_brush, x, y, w-1, h-1, 0, 360*64);
            return;
        } else{
            XFillArc(d->dpy, d->hd, d->gc_brush, x, y, w, h, 0, 360*64);
        }
    }
    if (d->has_pen)                // draw outline
        XDrawArc(d->dpy, d->hd, d->gc, x, y, w, h, 0, 360*64);
    d->resetAdaptedOrigin();
}



void QX11PaintEnginePrivate::fillPolygon_translated(const QPointF *polygonPoints, int pointCount,
                                                    QX11PaintEnginePrivate::GCMode gcMode,
                                                    QPaintEngine::PolygonDrawMode mode)
{

    QVarLengthArray<QPointF> translated_points(pointCount);
    QPointF offset(matrix.dx(), matrix.dy());
    for (int i = 0; i < pointCount; ++i)
        translated_points[i] = polygonPoints[i] + offset;
    fillPolygon_dev(translated_points.data(), pointCount, gcMode, mode);
}

#ifndef QT_NO_XRENDER
static void qt_XRenderCompositeTrapezoids(Display *dpy,
                                          int op,
                                          Picture src,
                                          Picture dst,
                                          _Xconst XRenderPictFormat *maskFormat,
                                          int xSrc,
                                          int ySrc,
                                          const QVector<XTrapezoid> &traps)
{
    const int MAX_TRAPS = 50000;
    int traps_left = traps.size();
    while (traps_left) {
        int to_draw = traps_left;
        if (to_draw > MAX_TRAPS)
            to_draw = MAX_TRAPS;
        XRenderCompositeTrapezoids(dpy, op, src, dst,
                                   maskFormat,
                                   xSrc, ySrc,
                                   traps.constData()+traps.size()-traps_left, to_draw);
        traps_left -= to_draw;
    }
}
#endif

void QX11PaintEnginePrivate::fillPolygon_dev(const QPointF *polygonPoints, int pointCount,
                                             QX11PaintEnginePrivate::GCMode gcMode,