| Absolute File Name: | /home/qt/qt5_coco/qt5/qtbase/src/gui/painting/qpaintdevice.cpp |
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|---|---|---|
| 1 | /**************************************************************************** | - |
| 2 | ** | - |
| 3 | ** Copyright (C) 2016 The Qt Company Ltd. | - |
| 4 | ** Contact: https://www.qt.io/licensing/ | - |
| 5 | ** | - |
| 6 | ** This file is part of the QtGui module of the Qt Toolkit. | - |
| 7 | ** | - |
| 8 | ** $QT_BEGIN_LICENSE:LGPL$ | - |
| 9 | ** Commercial License Usage | - |
| 10 | ** Licensees holding valid commercial Qt licenses may use this file in | - |
| 11 | ** accordance with the commercial license agreement provided with the | - |
| 12 | ** Software or, alternatively, in accordance with the terms contained in | - |
| 13 | ** a written agreement between you and The Qt Company. For licensing terms | - |
| 14 | ** and conditions see https://www.qt.io/terms-conditions. For further | - |
| 15 | ** information use the contact form at https://www.qt.io/contact-us. | - |
| 16 | ** | - |
| 17 | ** GNU Lesser General Public License Usage | - |
| 18 | ** Alternatively, this file may be used under the terms of the GNU Lesser | - |
| 19 | ** General Public License version 3 as published by the Free Software | - |
| 20 | ** Foundation and appearing in the file LICENSE.LGPL3 included in the | - |
| 21 | ** packaging of this file. Please review the following information to | - |
| 22 | ** ensure the GNU Lesser General Public License version 3 requirements | - |
| 23 | ** will be met: https://www.gnu.org/licenses/lgpl-3.0.html. | - |
| 24 | ** | - |
| 25 | ** GNU General Public License Usage | - |
| 26 | ** Alternatively, this file may be used under the terms of the GNU | - |
| 27 | ** General Public License version 2.0 or (at your option) the GNU General | - |
| 28 | ** Public license version 3 or any later version approved by the KDE Free | - |
| 29 | ** Qt Foundation. The licenses are as published by the Free Software | - |
| 30 | ** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3 | - |
| 31 | ** included in the packaging of this file. Please review the following | - |
| 32 | ** information to ensure the GNU General Public License requirements will | - |
| 33 | ** be met: https://www.gnu.org/licenses/gpl-2.0.html and | - |
| 34 | ** https://www.gnu.org/licenses/gpl-3.0.html. | - |
| 35 | ** | - |
| 36 | ** $QT_END_LICENSE$ | - |
| 37 | ** | - |
| 38 | ****************************************************************************/ | - |
| 39 | - | |
| 40 | #include "qpaintdevice.h" | - |
| 41 | - | |
| 42 | QT_BEGIN_NAMESPACE | - |
| 43 | - | |
| 44 | QPaintDevice::QPaintDevice() Q_DECL_NOEXCEPT | - |
| 45 | { | - |
| 46 | reserved = 0; | - |
| 47 | painters = 0; | - |
| 48 | } never executed: end of block | 0 |
| 49 | - | |
| 50 | QPaintDevice::~QPaintDevice() | - |
| 51 | { | - |
| 52 | if (paintingActive()) | - |
| 53 | qWarning("QPaintDevice: Cannot destroy paint device that is being " | - |
| 54 | "painted"); | - |
| 55 | } | - |
| 56 | - | |
| 57 | - | |
| 58 | /*! | - |
| 59 | \internal | - |
| 60 | */ | - |
| 61 | void QPaintDevice::initPainter(QPainter *) const | - |
| 62 | { | - |
| 63 | } | - |
| 64 | - | |
| 65 | /*! | - |
| 66 | \internal | - |
| 67 | */ | - |
| 68 | QPaintDevice *QPaintDevice::redirected(QPoint *) const | - |
| 69 | { | - |
| 70 | return 0; | - |
| 71 | } | - |
| 72 | - | |
| 73 | /*! | - |
| 74 | \internal | - |
| 75 | */ | - |
| 76 | QPainter *QPaintDevice::sharedPainter() const | - |
| 77 | { | - |
| 78 | return 0; | - |
| 79 | } | - |
| 80 | - | |
| 81 | Q_GUI_EXPORT int qt_paint_device_metric(const QPaintDevice *device, QPaintDevice::PaintDeviceMetric metric) | - |
| 82 | { | - |
| 83 | return device->metric(metric); | - |
| 84 | } | - |
| 85 | - | |
| 86 | int QPaintDevice::metric(PaintDeviceMetric m) const | - |
| 87 | { | - |
| 88 | // Fallback: A subclass has not implemented PdmDevicePixelRatioScaled but might | - |
| 89 | // have implemented PdmDevicePixelRatio. | - |
| 90 | if (m == PdmDevicePixelRatioScaled) | - |
| 91 | return this->metric(PdmDevicePixelRatio) * devicePixelRatioFScale(); | - |
| 92 | - | |
| 93 | qWarning("QPaintDevice::metrics: Device has no metric information"); | - |
| 94 | - | |
| 95 | if (m == PdmDpiX) { | - |
| 96 | return 72; | - |
| 97 | } else if (m == PdmDpiY) { | - |
| 98 | return 72; | - |
| 99 | } else if (m == PdmNumColors) { | - |
| 100 | // FIXME: does this need to be a real value? | - |
| 101 | return 256; | - |
| 102 | } else if (m == PdmDevicePixelRatio) { | - |
| 103 | return 1; | - |
| 104 | } else { | - |
| 105 | qDebug("Unrecognised metric %d!",m); | - |
| 106 | return 0; | - |
| 107 | } | - |
| 108 | } | - |
| 109 | - | |
| 110 | QT_END_NAMESPACE | - |
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