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| |
| #include "qpaintdevice.h" |
| |
| QT_BEGIN_NAMESPACE |
| |
| QPaintDevice::QPaintDevice() noexcept |
| { |
| reserved = 0; |
| painters = 0; |
| } |
| |
| QPaintDevice::~QPaintDevice() |
| { |
| if (paintingActive()) |
| qWarning("QPaintDevice: Cannot destroy paint device that is being " |
| "painted"); |
| } |
| |
| |
| /*! |
| \internal |
| */ |
| void QPaintDevice::initPainter(QPainter *) const |
| { |
| } |
| |
| /*! |
| \internal |
| */ |
| QPaintDevice *QPaintDevice::redirected(QPoint *) const |
| { |
| return 0; |
| } |
| |
| /*! |
| \internal |
| */ |
| QPainter *QPaintDevice::sharedPainter() const |
| { |
| return 0; |
| } |
| |
| Q_GUI_EXPORT int qt_paint_device_metric(const QPaintDevice *device, QPaintDevice::PaintDeviceMetric metric) |
| { |
| return device->metric(metric); |
| } |
| |
| int QPaintDevice::metric(PaintDeviceMetric m) const |
| { |
| // Fallback: A subclass has not implemented PdmDevicePixelRatioScaled but might |
| // have implemented PdmDevicePixelRatio. |
| if (m == PdmDevicePixelRatioScaled) |
| return this->metric(PdmDevicePixelRatio) * devicePixelRatioFScale(); |
| |
| qWarning("QPaintDevice::metrics: Device has no metric information"); |
| |
| if (m == PdmDpiX) { |
| return 72; |
| } else if (m == PdmDpiY) { |
| return 72; |
| } else if (m == PdmNumColors) { |
| // FIXME: does this need to be a real value? |
| return 256; |
| } else if (m == PdmDevicePixelRatio) { |
| return 1; |
| } else { |
| qDebug("Unrecognised metric %d!",m); |
| return 0; |
| } |
| } |
| |
| QT_END_NAMESPACE |