| 1 | // Copyright (C) 2016 The Qt Company Ltd. |
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| 2 | // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only |
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| 3 | |
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| 4 | #ifndef QPAINTDEVICE_H |
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| 5 | #define QPAINTDEVICE_H |
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| 6 | |
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| 7 | #include <QtGui/qtguiglobal.h> |
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| 8 | #include <QtGui/qwindowdefs.h> |
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| 9 | #include <QtCore/qrect.h> |
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| 10 | |
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| 11 | QT_BEGIN_NAMESPACE |
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| 12 | |
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| 13 | |
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| 14 | |
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| 15 | class QPaintEngine; |
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| 16 | |
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| 17 | class Q_GUI_EXPORT QPaintDevice // device for QPainter |
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| 18 | { |
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| 19 | public: |
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| 20 | enum PaintDeviceMetric { |
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| 21 | PdmWidth = 1, |
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| 22 | PdmHeight, |
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| 23 | PdmWidthMM, |
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| 24 | PdmHeightMM, |
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| 25 | PdmNumColors, |
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| 26 | PdmDepth, |
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| 27 | PdmDpiX, |
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| 28 | PdmDpiY, |
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| 29 | PdmPhysicalDpiX, |
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| 30 | PdmPhysicalDpiY, |
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| 31 | PdmDevicePixelRatio, |
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| 32 | PdmDevicePixelRatioScaled |
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| 33 | }; |
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| 34 | |
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| 35 | virtual ~QPaintDevice(); |
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| 36 | |
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| 37 | virtual int devType() const; |
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| 38 | bool paintingActive() const; |
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| 39 | virtual QPaintEngine *paintEngine() const = 0; |
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| 40 | |
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| 41 | int width() const { return metric(metric: PdmWidth); } |
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| 42 | int height() const { return metric(metric: PdmHeight); } |
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| 43 | int widthMM() const { return metric(metric: PdmWidthMM); } |
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| 44 | int heightMM() const { return metric(metric: PdmHeightMM); } |
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| 45 | int logicalDpiX() const { return metric(metric: PdmDpiX); } |
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| 46 | int logicalDpiY() const { return metric(metric: PdmDpiY); } |
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| 47 | int physicalDpiX() const { return metric(metric: PdmPhysicalDpiX); } |
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| 48 | int physicalDpiY() const { return metric(metric: PdmPhysicalDpiY); } |
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| 49 | qreal devicePixelRatio() const { return metric(metric: PdmDevicePixelRatioScaled) / devicePixelRatioFScale(); } |
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| 50 | qreal devicePixelRatioF() const { return devicePixelRatio(); } |
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| 51 | int colorCount() const { return metric(metric: PdmNumColors); } |
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| 52 | int depth() const { return metric(metric: PdmDepth); } |
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| 53 | |
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| 54 | static inline qreal devicePixelRatioFScale() { return 0x10000; } |
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| 55 | protected: |
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| 56 | QPaintDevice() noexcept; |
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| 57 | virtual int metric(PaintDeviceMetric metric) const; |
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| 58 | virtual void initPainter(QPainter *painter) const; |
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| 59 | virtual QPaintDevice *redirected(QPoint *offset) const; |
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| 60 | virtual QPainter *sharedPainter() const; |
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| 61 | |
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| 62 | ushort painters; // refcount |
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| 63 | private: |
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| 64 | Q_DISABLE_COPY(QPaintDevice) |
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| 65 | |
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| 66 | friend class QPainter; |
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| 67 | friend class QPainterPrivate; |
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| 68 | friend class QFontEngineMac; |
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| 69 | friend class QX11PaintEngine; |
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| 70 | friend Q_GUI_EXPORT int qt_paint_device_metric(const QPaintDevice *device, PaintDeviceMetric metric); |
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| 71 | }; |
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| 72 | |
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| 73 | /***************************************************************************** |
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| 74 | Inline functions |
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| 75 | *****************************************************************************/ |
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| 76 | |
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| 77 | inline int QPaintDevice::devType() const |
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| 78 | { return QInternal::UnknownDevice; } |
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| 79 | |
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| 80 | inline bool QPaintDevice::paintingActive() const |
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| 81 | { return painters != 0; } |
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| 82 | |
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| 83 | QT_END_NAMESPACE |
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| 84 | |
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| 85 | #endif // QPAINTDEVICE_H |
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| 86 | |
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