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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
#include "qpaintdevice.h"
QT_BEGIN_NAMESPACE
QPaintDevice::QPaintDevice() noexcept
{
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 nullptr;
}
/*!
\internal
*/
QPainter *QPaintDevice::sharedPainter() const
{
return nullptr;
}
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
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