C++ CachedImage::isTransparent方法代码示例

void InlineFlowBox::paintBackground(QPainter* p, const QColor& c, const BackgroundLayer* bgLayer,
                                    int my, int mh, int _tx, int _ty, int w, int h)
{
    CachedImage* bg = bgLayer->backgroundImage();
    bool hasBackgroundImage = bg && (bg->pixmap_size() == bg->valid_rect().size()) &&
                              !bg->isTransparent() && !bg->isErrorImage();
    if (!hasBackgroundImage || (!prevLineBox() && !nextLineBox()) || !parent())
        object()->paintBackgroundExtended(p, c, bgLayer, my, mh, _tx, _ty, w, h, borderLeft(), borderRight(), paddingLeft(), paddingRight());
    else {
        // We have a background image that spans multiple lines.
        // We need to adjust _tx and _ty by the width of all previous lines.
        // Think of background painting on inlines as though you had one long line, a single continuous
        // strip.  Even though that strip has been broken up across multiple lines, you still paint it
        // as though you had one single line.  This means each line has to pick up the background where
        // the previous line left off.
        // FIXME: What the heck do we do with RTL here? The math we're using is obviously not right,
        // but it isn't even clear how this should work at all.
        int xOffsetOnLine = 0;
        for (InlineRunBox* curr = prevLineBox(); curr; curr = curr->prevLineBox())
            xOffsetOnLine += curr->width();
        int startX = _tx - xOffsetOnLine;
        int totalWidth = xOffsetOnLine;
        for (InlineRunBox* curr = this; curr; curr = curr->nextLineBox())
            totalWidth += curr->width();
        p->save();
        p->setClipRect(QRect(_tx, _ty, width(), height()), QPainter::CoordPainter);
        object()->paintBackgroundExtended(p, c, bgLayer, my, mh, startX, _ty,
                                          totalWidth, h, borderLeft(), borderRight(), paddingLeft(), paddingRight());
        p->restore();
    }
}

void RenderImage::paint(PaintInfo& paintInfo, int _tx, int _ty)
{
    if (paintInfo.phase == PaintActionOutline && style()->outlineWidth() && style()->visibility() == VISIBLE)
        paintOutline(paintInfo.p, _tx + m_x, _ty + m_y, width(), height(), style());

    if (paintInfo.phase != PaintActionForeground && paintInfo.phase != PaintActionSelection)
        return;

    // not visible or not even once layouted?
    if (style()->visibility() != VISIBLE || m_y <=  -500000)  return;

    _tx += m_x;
    _ty += m_y;

    if((_ty > paintInfo.r.bottom()) || (_ty + m_height <= paintInfo.r.top())) return;

    if(shouldPaintBackgroundOrBorder())
        paintBoxDecorations(paintInfo, _tx, _ty);

    if (!canvas()->printImages())
        return;

    int cWidth = contentWidth();
    int cHeight = contentHeight();
    int leftBorder = borderLeft();
    int topBorder = borderTop();
    int leftPad = paddingLeft();
    int topPad = paddingTop();

    // paint frame around image and loading icon as long as it is not completely loaded from web.
    if (bUnfinishedImageFrame && paintInfo.phase == PaintActionForeground && cWidth > 2 && cHeight > 2 && !complete()) {
        static QPixmap *loadingIcon;
        QColor bg = khtml::retrieveBackgroundColor(this);
        QColor fg = khtml::hasSufficientContrast(Qt::gray, bg) ? Qt::gray :
                    (hasSufficientContrast(Qt::white, bg) ? Qt::white : Qt::black);
        paintInfo.p->setPen(QPen(fg, 1));
        paintInfo.p->setBrush( Qt::NoBrush );
        const int offsetX = _tx + leftBorder + leftPad;
        const int offsetY = _ty + topBorder + topPad;
        paintInfo.p->drawRect(offsetX, offsetY, cWidth - 1, cHeight - 1);
        if (!(m_width <= 5 || m_height <= 5)) {
            if (!loadingIcon) {
                loadingIcon = new QPixmap();
                loadingIcon->loadFromData(loading_icon_data, loading_icon_len);
            }
            paintInfo.p->drawPixmap(offsetX + 4, offsetY + 4, *loadingIcon, 0, 0, cWidth - 5, cHeight - 5);
        }

    }

    CachedImage* i = m_cachedImage;

    //kDebug( 6040 ) << "    contents (" << contentWidth << "/" << contentHeight << ") border=" << borderLeft() << " padding=" << paddingLeft();
    if ( !i || berrorPic)
    {
        if(cWidth > 2 && cHeight > 2)
        {
            if ( !berrorPic ) {
                //qDebug("qDrawShadePanel %d/%d/%d/%d", _tx + leftBorder, _ty + topBorder, cWidth, cHeight);
                qDrawShadePanel( paintInfo.p, _tx + leftBorder + leftPad, _ty + topBorder + topPad, cWidth, cHeight,
                                 QApplication::palette(), true, 1 );
            }

            QPixmap pix = *Cache::brokenPixmap;
            if(berrorPic && (cWidth >= pix.width()+4) && (cHeight >= pix.height()+4) )
            {
                QRect r(pix.rect());
                r = r.intersect(QRect(0, 0, cWidth-4, cHeight-4));
                paintInfo.p->drawPixmap( QPoint( _tx + leftBorder + leftPad+2, _ty + topBorder + topPad+2), pix, r );
            }

            if(!alt.isEmpty()) {
                QString text = alt.string();
                paintInfo.p->setFont(style()->font());
                paintInfo.p->setPen( style()->color() );
                int ax = _tx + leftBorder + leftPad + 2;
                int ay = _ty + topBorder + topPad + 2;
                const QFontMetrics &fm = style()->fontMetrics();

//BEGIN HACK
#ifdef __GNUC__
  #warning "KDE4: hack for testregression, remove when main branch"
#endif
                ax     += qMax(-fm.minLeftBearing(), 0);
                cWidth -= qMax(-fm.minLeftBearing(), 0);

//END HACK
                if (cWidth>5 && cHeight>=fm.height())
                    paintInfo.p->drawText(ax, ay+1, cWidth - 4, cHeight - 4, Qt::TextWordWrap, text );
            }
        }
    }
    else if (i && !i->isTransparent() &&
             i->image()->size().width() && i->image()->size().height())
    {
        paintInfo.p->setPen( Qt::black ); // used for bitmaps
        //const QPixmap& pix = i->pixmap();
        if (!m_imagePainter)
            m_imagePainter = new ImagePainter(i->image());

//.........这里部分代码省略.........