C++ (Cpp) dotsPerMeterX示例

示例#1

int QDirectFBPaintDevice::metric(QPaintDevice::PaintDeviceMetric metric) const
{
    if (!dfbSurface)
        return 0;

    int w, h;
    dfbSurface->GetSize(dfbSurface, &w, &h);

    switch (metric) {
    case QPaintDevice::PdmWidth:
        return w;
    case QPaintDevice::PdmHeight:
        return h;
    case QPaintDevice::PdmWidthMM:
        return (w * 1000) / dotsPerMeterX();
    case QPaintDevice::PdmHeightMM:
        return (h * 1000) / dotsPerMeterY();
    case QPaintDevice::PdmPhysicalDpiX:
    case QPaintDevice::PdmDpiX:
        return (dotsPerMeterX() * 254) / 10000; // 0.0254 meters-per-inch
    case QPaintDevice::PdmPhysicalDpiY:
    case QPaintDevice::PdmDpiY:
        return (dotsPerMeterY() * 254) / 10000; // 0.0254 meters-per-inch
    case QPaintDevice::PdmDepth:
        DFBSurfacePixelFormat format;
        dfbSurface->GetPixelFormat(dfbSurface, &format);
        return QDirectFBScreen::depth(format);
    case QPaintDevice::PdmNumColors: {
       if (lockedImage)
            return lockedImage->numColors();

        DFBResult result;
        IDirectFBPalette *palette = 0;
        unsigned int numColors = 0;

        result = dfbSurface->GetPalette(dfbSurface, &palette);
        if ((result != DFB_OK) || !palette)
            return 0;

        result = palette->GetSize(palette, &numColors);
        palette->Release(palette);
        if (result != DFB_OK)
            return 0;

        return numColors;
    }
    default:
        qCritical("QDirectFBPaintDevice::metric(): Unhandled metric!");
        return 0;
    }
}

示例#2

文件： kpdocumentmetainfo.cpp 项目： serghei/kde3-kdegraphics

// public
void kpDocumentMetaInfo::printDebug (const QString &prefix) const
{
    const QString usedPrefix = !prefix.isEmpty () ?
                                   prefix + QString::fromLatin1 (":") :
                                   QString::null;

    kdDebug () << usedPrefix << endl;

    kdDebug () << "dotsPerMeter X=" << dotsPerMeterX ()
               << " Y=" << dotsPerMeterY ()
               << " offset=" << offset () << endl;

    QValueList <QImageTextKeyLang> keyList = textList ();
    for (QValueList <QImageTextKeyLang>::const_iterator it = keyList.begin ();
         it != keyList.end ();
         it++)
    {
        kdDebug () << "key=" << (*it).key
                   << " lang=" << (*it).lang
                   << " text=" << text (*it)
                   << endl;
    }

    kdDebug () << usedPrefix << "ENDS" << endl;
}

示例#3

文件： qdirectfbpaintdevice.cpp 项目： AtlantisCD9/Qt

int QDirectFBPaintDevice::metric(QPaintDevice::PaintDeviceMetric metric) const
{
    if (!dfbSurface)
        return 0;

    switch (metric) {
    case QPaintDevice::PdmWidth:
    case QPaintDevice::PdmHeight:
        return (metric == PdmWidth ? size().width() : size().height());
    case QPaintDevice::PdmWidthMM:
        return (size().width() * 1000) / dotsPerMeterX();
    case QPaintDevice::PdmHeightMM:
        return (size().height() * 1000) / dotsPerMeterY();
    case QPaintDevice::PdmPhysicalDpiX:
    case QPaintDevice::PdmDpiX:
        return (dotsPerMeterX() * 254) / 10000; // 0.0254 meters-per-inch
    case QPaintDevice::PdmPhysicalDpiY:
    case QPaintDevice::PdmDpiY:
        return (dotsPerMeterY() * 254) / 10000; // 0.0254 meters-per-inch
    case QPaintDevice::PdmDepth:
        return QDirectFBScreen::depth(imageFormat);
    case QPaintDevice::PdmNumColors: {
        if (!lockedImage.isNull())
            return lockedImage.colorCount();

        DFBResult result;
        IDirectFBPalette *palette = 0;
        unsigned int numColors = 0;

        result = dfbSurface->GetPalette(dfbSurface, &palette);
        if ((result != DFB_OK) || !palette)
            return 0;

        result = palette->GetSize(palette, &numColors);
        palette->Release(palette);
        if (result != DFB_OK)
            return 0;

        return numColors;
    }
    default:
        qCritical("QDirectFBPaintDevice::metric(): Unhandled metric!");
        return 0;
    }
}