qpaintengine_x11.cpp

奇趣公司比较新的qt/emd版本

    if (adjust_coords) {
        d->matrix = QTransform(d->matrix.m11(), d->matrix.m12(), d->matrix.m21(), d->matrix.m22(),
                               d->matrix.dx() + 0.5f, d->matrix.dy() + 0.5f);
    }
    if (d->has_brush)
        d->fillPath(path, QX11PaintEnginePrivate::BrushGC, true);

    if (d->has_pen
        && ((X11->use_xrender && (d->has_alpha_pen || d->has_alpha_brush
                                  || (d->render_hints & QPainter::Antialiasing)))
            || (!d->cpen.isCosmetic() && d->txop > QTransform::TxTranslate)
            || (d->cpen.style() > Qt::SolidLine))) {
        QPainterPathStroker stroker;
        if (d->cpen.style() == Qt::CustomDashLine) {
            stroker.setDashPattern(d->cpen.dashPattern());
            stroker.setDashOffset(d->cpen.dashOffset());
        } else {
            stroker.setDashPattern(d->cpen.style());
        }
        stroker.setCapStyle(d->cpen.capStyle());
        stroker.setJoinStyle(d->cpen.joinStyle());
        QPainterPath stroke;
        qreal width = d->cpen.widthF();
        QPolygonF poly;
        // necessary to get aliased alphablended primitives to be drawn correctly
        if (d->cpen.isCosmetic()) {
            stroker.setWidth(width == 0 ? 1 : width);
            stroke = stroker.createStroke(path * d->matrix);
            if (stroke.isEmpty())
                return;
            stroke.setFillRule(Qt::WindingFill);
            d->fillPath(stroke, QX11PaintEnginePrivate::PenGC, false);
        } else {
            stroker.setWidth(width);
            stroke = stroker.createStroke(path);
            if (stroke.isEmpty())
                return;
            stroke.setFillRule(Qt::WindingFill);
            d->fillPath(stroke, QX11PaintEnginePrivate::PenGC, true);
        }
    } else if (d->has_pen) {
        // if we have a pen width of 0 - use XDrawLine() for speed
        QList<QPolygonF> polys = path.toSubpathPolygons(d->matrix);
        for (int i = 0; i < polys.size(); ++i)
            d->strokePolygon_dev(polys.at(i).data(), polys.at(i).size(), false);
    }
    if (adjust_coords)
        d->matrix = old_matrix;
}

void QX11PaintEngine::drawImage(const QRectF &r, const QImage &image, const QRectF &sr, Qt::ImageConversionFlags flags)
{
    Q_D(QX11PaintEngine);

    if (!image.hasAlphaChannel()
        && d->pdev_depth >= 24 && image.depth() == 32
        && r.size() == sr.size())
    {
        int sx = qRound(sr.x());
        int sy = qRound(sr.y());
        int x = qRound(r.x());
        int y = qRound(r.y());
        int w = qRound(r.width());
        int h = qRound(r.height());
        XImage *xi;
        QImage im(image);
        // Note: this code assumes either RGB or BGR, 8 bpc server layouts
        const uint red_mask = (uint) ((Visual *) d->xinfo->visual())->red_mask;
        bool bgr_layout = (red_mask == 0xff);
        if ((QSysInfo::ByteOrder == QSysInfo::BigEndian
             && ((ImageByteOrder(d->dpy) == LSBFirst) || bgr_layout))
            || (ImageByteOrder(d->dpy) == MSBFirst && QSysInfo::ByteOrder == QSysInfo::LittleEndian))
        {
            for (int i=0; i < im.height(); i++) {
                uint *p = (uint*)im.scanLine(i);
                uint *end = p + im.width();
                if (bgr_layout && ImageByteOrder(d->dpy) == MSBFirst && QSysInfo::ByteOrder == QSysInfo::LittleEndian) {
                    while (p < end) {
                        *p = ((*p << 8) & 0xffffff00) | ((*p >> 24) & 0x000000ff);
                        p++;
                    }
                } else if ((ImageByteOrder(d->dpy) == LSBFirst && QSysInfo::ByteOrder == QSysInfo::BigEndian)
                           || (ImageByteOrder(d->dpy) == MSBFirst && QSysInfo::ByteOrder == QSysInfo::LittleEndian)) {
                    while (p < end) {
                        *p = ((*p << 24) & 0xff000000) | ((*p << 8) & 0x00ff0000)
                             | ((*p >> 8) & 0x0000ff00) | ((*p >> 24) & 0x000000ff);
                        p++;
                    }
                } else if (ImageByteOrder(d->dpy) == MSBFirst && QSysInfo::ByteOrder == QSysInfo::BigEndian) {
                    while (p < end) {
                        *p = ((*p << 16) & 0x00ff0000) | ((*p >> 16) & 0x000000ff)
                             | ((*p ) & 0xff00ff00);
                        p++;
                    }
                }
            }
        }
        xi = XCreateImage(d->dpy, (Visual *) d->xinfo->visual(), d->pdev_depth, ZPixmap,
                          0, (char *) im.scanLine(sy)+sx*sizeof(uint), w, h, 32, im.bytesPerLine());
        XPutImage(d->dpy, d->hd, d->gc, xi, 0, 0, x, y, w, h);
        xi->data = 0; // QImage owns these bits
        XDestroyImage(xi);
    } else {
        QPaintEngine::drawImage(r, image, sr, flags);
    }
}

void QX11PaintEngine::drawPixmap(const QRectF &r, const QPixmap &pixmap, const QRectF &_sr)
{
    Q_D(QX11PaintEngine);
    QRectF sr = _sr;
    int x = qRound(r.x());
    int y = qRound(r.y());
    int sx = qRound(sr.x());
    int sy = qRound(sr.y());
    int sw = qRound(sr.width());
    int sh = qRound(sr.height());

    if ((d->xinfo && d->xinfo->screen() != pixmap.x11Info().screen())
        || (pixmap.x11Info().screen() != DefaultScreen(X11->display))) {
        QPixmap* p = const_cast<QPixmap *>(&pixmap);
        p->x11SetScreen(d->xinfo ? d->xinfo->screen() : DefaultScreen(X11->display));
    }

    QPixmap::x11SetDefaultScreen(pixmap.x11Info().screen());

#ifndef QT_NO_XRENDER
    ::Picture src_pict = pixmap.data->picture;
    if (src_pict && d->picture) {
        if (pixmap.data->d == 1 && (d->has_alpha_pen)) {
            qt_render_bitmap(d->dpy, d->scrn, src_pict, d->picture,
                             sx, sy, x, y, sw, sh, d->cpen);
            return;
        } else if (pixmap.data->d != 1 && (pixmap.data->d == 32 || pixmap.data->d != d->pdev_depth)) {
            XRenderComposite(d->dpy, d->composition_mode,
                             src_pict, 0, d->picture, sx, sy, 0, 0, x, y, sw, sh);
            return;
        }
    }
#endif

    bool mono_src = pixmap.data->d == 1;
    bool mono_dst = d->pdev_depth == 1;
    bool restore_clip = false;

    if (pixmap.data->x11_mask) { // pixmap has a mask
        QBitmap comb(sw, sh);
        GC cgc = XCreateGC(d->dpy, comb.handle(), 0, 0);
        XSetForeground(d->dpy, cgc, 0);
        XFillRectangle(d->dpy, comb.handle(), cgc, 0, 0, sw, sh);
        XSetBackground(d->dpy, cgc, 0);
        XSetForeground(d->dpy, cgc, 1);
        if (!d->crgn.isEmpty()) {
            int num;
            XRectangle *rects = (XRectangle *)qt_getClipRects(d->crgn, num);
            XSetClipRectangles(d->dpy, cgc, -x, -y, rects, num, Unsorted);
        } else if (d->has_clipping) {
            XSetClipRectangles(d->dpy, cgc, 0, 0, 0, 0, Unsorted);
        }
        XSetFillStyle(d->dpy, cgc, FillOpaqueStippled);
        XSetTSOrigin(d->dpy, cgc, -sx, -sy);
        XSetStipple(d->dpy, cgc, pixmap.data->x11_mask);
        XFillRectangle(d->dpy, comb.handle(), cgc, 0, 0, sw, sh);
        XFreeGC(d->dpy, cgc);

        XSetClipOrigin(d->dpy, d->gc, x, y);
        XSetClipMask(d->dpy, d->gc, comb.handle());
        restore_clip = true;
    }

    if (mono_src) {
        if (!d->crgn.isEmpty()) {
            Pixmap comb = XCreatePixmap(d->dpy, d->hd, sw, sh, 1);
            GC cgc = XCreateGC(d->dpy, comb, 0, 0);
            XSetForeground(d->dpy, cgc, 0);
            XFillRectangle(d->dpy, comb, cgc, 0, 0, sw, sh);
            int num;
            XRectangle *rects = (XRectangle *)qt_getClipRects(d->crgn, num);
            XSetClipRectangles(d->dpy, cgc, -x, -y, rects, num, Unsorted);
            XCopyArea(d->dpy, pixmap.handle(), comb, cgc, sx, sy, sw, sh, 0, 0);
            XFreeGC(d->dpy, cgc);

            XSetClipMask(d->dpy, d->gc, comb);
            XSetClipOrigin(d->dpy, d->gc, x, y);
            XFreePixmap(d->dpy, comb);
        } else {
            XSetClipMask(d->dpy, d->gc, pixmap.handle());
            XSetClipOrigin(d->dpy, d->gc, x - sx, y - sy);
        }

        if (mono_dst) {
            XSetForeground(d->dpy, d->gc, qGray(d->cpen.color().rgb()) > 127 ? 0 : 1);
        } else {
            QColormap cmap = QColormap::instance(d->scrn);
            XSetForeground(d->dpy, d->gc, cmap.pixel(d->cpen.color()));
        }
        XFillRectangle(d->dpy, d->hd, d->gc, x, y, sw, sh);
        restore_clip = true;
    } else {
        XCopyArea(d->dpy, pixmap.handle(), d->hd, d->gc, sx, sy, sw, sh, x, y);
    }

    if (d->pdev->devType() == QInternal::Pixmap) {
        const QPixmap *px = static_cast<const QPixmap*>(d->pdev);
        Pixmap src_mask = pixmap.data->x11_mask;
        Pixmap dst_mask = px->data->x11_mask;
        if (dst_mask) {
            GC cgc = XCreateGC(d->dpy, dst_mask, 0, 0);
            if (src_mask) { // copy src mask into dst mask
                XCopyArea(d->dpy, pixmap.data->x11_mask, px->data->x11_mask, cgc, sx, sy, sw, sh, x, y);
            } else { // no src mask, but make sure the area copied is opaque in dest
                XSetBackground(d->dpy, cgc, 0);
                XSetForeground(d->dpy, cgc, 1);
                XFillRectangle(d->dpy, px->data->x11_mask, cgc, x, y, sw, sh);
            }
            XFreeGC(d->dpy, cgc);
        }
    }

    if (restore_clip) {
        XSetClipOrigin(d->dpy, d->gc, 0, 0);
        int num;
        XRectangle *rects = (XRectangle *)qt_getClipRects(d->crgn, num);
        if (num == 0)
            XSetClipMask(d->dpy, d->gc, XNone);
        else
            XSetClipRectangles(d->dpy, d->gc, 0, 0, rects, num, Unsorted);
    }
}

void QX11PaintEngine::updateMatrix(const QTransform &mtx)
{
    Q_D(QX11PaintEngine);
    d->matrix = mtx;
    d->txop = d->matrix.type();

    d->has_complex_xform = (d->txop > QTransform::TxTranslate);
}

/*
   NB! the clip region is expected to be in dev coordinates
*/
void QX11PaintEngine::updateClipRegion_dev(const QRegion &clipRegion, Qt::ClipOperation op)
{
    Q_D(QX11PaintEngine);
    QRegion sysClip = systemClip();
    if (op == Qt::NoClip) {
        d->has_clipping = false;
        d->crgn = sysClip;
        if (!sysClip.isEmpty()) {
            x11SetClipRegion(d->dpy, d->gc, d->gc_brush, d->picture, sysClip);
        } else {
            x11ClearClipRegion(d->dpy, d->gc, d->gc_brush, d->picture);
        }
        return;
    }

    switch (op) {
    case Qt::IntersectClip:
        if (d->has_clipping) {
            d->crgn &= clipRegion;
            break;
        }
        // fall through
    case Qt::ReplaceClip:
        if (!sysClip.isEmpty())
            d->crgn = clipRegion.intersected(sysClip);
        else
            d->crgn = clipRegion;
        break;
    case Qt::UniteClip:
        d->crgn |= clipRegion;
        if (!sysClip.isEmpty())
            d->crgn = d->crgn.intersected(sysClip);
        break;
    default:
        break;
    }
    d->has_clipping = true;
    x11SetClipRegion(d->dpy, d->gc, d->gc_brush, d->picture, d->crgn);
}

void QX11PaintEngine::updateFont(const QFont &)
{
}

Qt::HANDLE QX11PaintEngine::handle() const
{
    Q_D(const QX11PaintEngine);
    Q_ASSERT(isActive());
    Q_ASSERT(d->hd);
    return d->hd;
}

extern void qt_draw_tile(QPaintEngine *, qreal, qreal, qreal, qreal, const QPixmap &,
                         qreal, qreal);

void QX11PaintEngine::drawTiledPixmap(const QRectF &r, const QPixmap &pixmap, const QPointF &p)
{
    int x = qRound(r.x());
    int y = qRound(r.y());
    int w = qRound(r.width());
    int h = qRound(r.height());
    int sx = qRound(p.x());
    int sy = qRound(p.y());

    bool mono_src = pixmap.depth() == 1;
    Q_D(QX11PaintEngine);
#ifndef QT_NO_XRENDER
    if (X11->use_xrender && d->picture && pixmap.x11PictureHandle()) {
#if 0
        // ### enable this in Qt 5
        XRenderPictureAttributes attrs;
        attrs.repeat = true;
        XRenderChangePicture(d->dpy, pixmap.x11PictureHandle(), CPRepeat, &attrs);

        if (mono_src) {
            qt_render_bitmap(d->dpy, d->scrn, pixmap.x11PictureHandle(), d->picture,
                             sx, sy, x, y, w, h, d->cpen);
        } else {
            XRenderComposite(d->dpy, d->composition_mode,
                             pixmap.x11PictureHandle(), XNone, d->picture,
                             sx, sy, 0, 0, x, y, w, h);
        }
#else
        const int numTiles = (w / pixmap.width()) * (h / pixmap.height());
        if (numTiles < 100) {
            // this is essentially qt_draw_tile(), inlined for
            // the XRenderComposite call
            int yPos, xPos, drawH, drawW, yOff, xOff;
            yPos = y;
            yOff = sy;
            while(yPos < y + h) {
                drawH = pixmap.height() - yOff;    // Cropping first row
                if (yPos + drawH > y + h)        // Cropping last row
                    drawH = y + h - yPos;
                xPos = x;
                xOff = sx;
                while(xPos < x + w) {
                    drawW = pixmap.width() - xOff; // Cropping first column
                    if (xPos + drawW > x + w)    // Cropping last column
                        drawW = x + w - xPos;
                    if (mono_src) {
                        qt_render_bitmap(d->dpy, d->scrn, pixmap.x11PictureHandle(), d->picture,
                                         xOff, yOff, xPos, yPos, drawW, drawH, d->cpen);
                    } else {
                        XRenderComposite(d->dpy, d->composition_mode,
                                         pixmap.x11PictureHandle(), XNone, d->picture,
                                         xOff, yOff, 0, 0, xPos, yPos, drawW, drawH);
                    }
                    xPos += drawW;
                    xOff = 0;
                }
                yPos += drawH;
                yOff = 0;
            }
        } else {
            w = qMin(w, d->pdev->width() - x);
            h = qMin(h, d->pdev->height() - y);

            const int pw = w + sx;
            const int ph = h + sy;
            QPixmap pm(pw, ph);
            if (pixmap.hasAlpha() || mono_src)
                pm.fill(Qt::transparent);

            const int mode = pix