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| |
| #ifndef QHIGHDPISCALING_P_H |
| #define QHIGHDPISCALING_P_H |
| |
| // |
| // W A R N I N G |
| // ------------- |
| // |
| // This file is not part of the Qt API. It exists purely as an |
| // implementation detail. This header file may change from version to |
| // version without notice, or even be removed. |
| // |
| // We mean it. |
| // |
| |
| #include <QtGui/private/qtguiglobal_p.h> |
| #include <QtCore/qmargins.h> |
| #include <QtCore/qmath.h> |
| #include <QtCore/qrect.h> |
| #include <QtCore/qvector.h> |
| #include <QtCore/qloggingcategory.h> |
| #include <QtGui/qregion.h> |
| #include <QtGui/qscreen.h> |
| #include <QtGui/qvector2d.h> |
| #include <QtGui/qwindow.h> |
| |
| QT_BEGIN_NAMESPACE |
| |
| Q_DECLARE_LOGGING_CATEGORY(lcScaling); |
| |
| class QScreen; |
| class QPlatformScreen; |
| typedef QPair<qreal, qreal> QDpi; |
| |
| #ifndef QT_NO_HIGHDPISCALING |
| class Q_GUI_EXPORT QHighDpiScaling { |
| Q_GADGET |
| public: |
| enum class DpiAdjustmentPolicy { |
| Unset, |
| Enabled, |
| Disabled, |
| UpOnly |
| }; |
| Q_ENUM(DpiAdjustmentPolicy) |
| |
| QHighDpiScaling() = delete; |
| ~QHighDpiScaling() = delete; |
| QHighDpiScaling(const QHighDpiScaling &) = delete; |
| QHighDpiScaling &operator=(const QHighDpiScaling &) = delete; |
| QHighDpiScaling(QHighDpiScaling &&) = delete; |
| QHighDpiScaling &operator=(QHighDpiScaling &&) = delete; |
| |
| static void initHighDpiScaling(); |
| static void updateHighDpiScaling(); |
| static void setGlobalFactor(qreal factor); |
| static void setScreenFactor(QScreen *screen, qreal factor); |
| |
| static bool isActive() { return m_active; } |
| |
| struct ScaleAndOrigin |
| { |
| qreal factor; |
| QPoint origin; |
| }; |
| static ScaleAndOrigin scaleAndOrigin(const QPlatformScreen *platformScreen, QPoint *nativePosition = nullptr); |
| static ScaleAndOrigin scaleAndOrigin(const QScreen *screen, QPoint *nativePosition = nullptr); |
| static ScaleAndOrigin scaleAndOrigin(const QWindow *platformScreen, QPoint *nativePosition = nullptr); |
| |
| template<typename C> |
| static qreal factor(C *context, QPoint *nativePosition = nullptr) { |
| return scaleAndOrigin(context, nativePosition).factor; |
| } |
| |
| static QPoint mapPositionFromNative(const QPoint &pos, const QPlatformScreen *platformScreen); |
| static QPoint mapPositionToNative(const QPoint &pos, const QPlatformScreen *platformScreen); |
| static QPoint mapPositionToGlobal(const QPoint &pos, const QPoint &windowGlobalPosition, const QWindow *window); |
| static QPoint mapPositionFromGlobal(const QPoint &pos, const QPoint &windowGlobalPosition, const QWindow *window); |
| static QDpi logicalDpi(const QScreen *screen); |
| |
| private: |
| static qreal rawScaleFactor(const QPlatformScreen *screen); |
| static qreal roundScaleFactor(qreal rawFactor); |
| static QDpi effectiveLogicalDpi(const QPlatformScreen *screen, qreal rawFactor, qreal roundedFactor); |
| static qreal screenSubfactor(const QPlatformScreen *screen); |
| |
| static qreal m_factor; |
| static bool m_active; |
| static bool m_usePixelDensity; |
| static bool m_globalScalingActive; |
| static bool m_pixelDensityScalingActive; |
| static bool m_screenFactorSet; |
| static QDpi m_logicalDpi; |
| }; |
| |
| // Coordinate system conversion functions: |
| // QHighDpi::fromNativePixels : from physical(screen/backing) to logical pixels |
| // QHighDpi::toNativePixels : from logical to physical pixels |
| |
| namespace QHighDpi { |
| |
| inline qreal scale(qreal value, qreal scaleFactor, QPointF /* origin */ = QPointF(0, 0)) |
| { |
| return value * scaleFactor; |
| } |
| |
| inline QSize scale(const QSize &value, qreal scaleFactor, QPointF /* origin */ = QPointF(0, 0)) |
| { |
| return value * scaleFactor; |
| } |
| |
| inline QSizeF scale(const QSizeF &value, qreal scaleFactor, QPointF /* origin */ = QPointF(0, 0)) |
| { |
| return value * scaleFactor; |
| } |
| |
| inline QVector2D scale(const QVector2D &value, qreal scaleFactor, QPointF /* origin */ = QPointF(0, 0)) |
| { |
| return value * float(scaleFactor); |
| } |
| |
| inline QPointF scale(const QPointF &pos, qreal scaleFactor, QPointF origin = QPointF(0, 0)) |
| { |
| return (pos - origin) * scaleFactor + origin; |
| } |
| |
| inline QPoint scale(const QPoint &pos, qreal scaleFactor, QPoint origin = QPoint(0, 0)) |
| { |
| return (pos - origin) * scaleFactor + origin; |
| } |
| |
| inline QRect scale(const QRect &rect, qreal scaleFactor, QPoint origin = QPoint(0, 0)) |
| { |
| return QRect(scale(rect.topLeft(), scaleFactor, origin), scale(rect.size(), scaleFactor)); |
| } |
| |
| inline QRectF scale(const QRectF &rect, qreal scaleFactor, QPoint origin = QPoint(0, 0)) |
| { |
| return QRectF(scale(rect.topLeft(), scaleFactor, origin), scale(rect.size(), scaleFactor)); |
| } |
| |
| inline QMargins scale(const QMargins &margins, qreal scaleFactor, QPoint origin = QPoint(0, 0)) |
| { |
| Q_UNUSED(origin) |
| return QMargins(qRound(qreal(margins.left()) * scaleFactor), qRound(qreal(margins.top()) * scaleFactor), |
| qRound(qreal(margins.right()) * scaleFactor), qRound(qreal(margins.bottom()) * scaleFactor)); |
| } |
| |
| template <typename T> |
| QVector<T> scale(const QVector<T> &vector, qreal scaleFactor, QPoint origin = QPoint(0, 0)) |
| { |
| if (!QHighDpiScaling::isActive()) |
| return vector; |
| |
| QVector<T> scaled; |
| scaled.reserve(vector.size()); |
| for (const T &item : vector) |
| scaled.append(scale(item, scaleFactor, origin)); |
| return scaled; |
| } |
| |
| inline QRegion scale(const QRegion ®ion, qreal scaleFactor, QPoint origin = QPoint(0, 0)) |
| { |
| if (!QHighDpiScaling::isActive()) |
| return region; |
| |
| QRegion scaled; |
| for (const QRect &rect : region) |
| scaled += scale(rect, scaleFactor, origin); |
| return scaled; |
| } |
| |
| template <typename T> |
| inline QPoint position(T) { return QPoint(); } |
| inline QPoint position(QPoint point) { return point; } |
| inline QPoint position(QPointF point) { return point.toPoint(); } |
| inline QPoint position(QRect rect) { return rect.center(); } |
| inline QPoint position(QRectF rect) { return rect.center().toPoint(); } |
| |
| template <typename T, typename C> |
| T fromNativePixels(const T &value, const C *context) |
| { |
| QPoint nativePosition = position(value); |
| QHighDpiScaling::ScaleAndOrigin so = QHighDpiScaling::scaleAndOrigin(context, &nativePosition); |
| return scale(value, qreal(1) / so.factor, so.origin); |
| } |
| |
| template <typename T, typename C> |
| T toNativePixels(const T &value, const C *context) |
| { |
| QHighDpiScaling::ScaleAndOrigin so = QHighDpiScaling::scaleAndOrigin(context); |
| return scale(value, so.factor, so.origin); |
| } |
| |
| template <typename T, typename C> |
| T fromNativeLocalPosition(const T &value, const C *context) |
| { |
| return scale(value, qreal(1) / QHighDpiScaling::factor(context)); |
| } |
| |
| template <typename T, typename C> |
| T toNativeLocalPosition(const T &value, const C *context) |
| { |
| return scale(value, QHighDpiScaling::factor(context)); |
| } |
| |
| template <typename T> |
| inline T fromNative(const T &value, qreal scaleFactor, QPoint origin = QPoint(0, 0)) |
| { |
| return scale(value, qreal(1) / scaleFactor, origin); |
| } |
| |
| template <typename T> |
| inline T toNative(const T &value, qreal scaleFactor, QPoint origin = QPoint(0, 0)) |
| { |
| return scale(value, scaleFactor, origin); |
| } |
| |
| inline QRect fromNative(const QRect &rect, const QScreen *screen, const QPoint &screenOrigin) |
| { |
| return scale(rect, qreal(1) / QHighDpiScaling::factor(screen), screenOrigin); |
| } |
| |
| inline QRect fromNativeScreenGeometry(const QRect &nativeScreenGeometry, const QScreen *screen) |
| { |
| return QRect(nativeScreenGeometry.topLeft(), |
| scale(nativeScreenGeometry.size(), qreal(1) / QHighDpiScaling::factor(screen))); |
| } |
| |
| inline QRegion fromNativeLocalRegion(const QRegion &pixelRegion, const QWindow *window) |
| { |
| return scale(pixelRegion, qreal(1) / QHighDpiScaling::factor(window)); |
| } |
| |
| // When mapping expose events to Qt rects: round top/left towards the origin and |
| // bottom/right away from the origin, making sure that we cover the whole window. |
| inline QRegion fromNativeLocalExposedRegion(const QRegion &pixelRegion, const QWindow *window) |
| { |
| if (!QHighDpiScaling::isActive()) |
| return pixelRegion; |
| |
| const qreal scaleFactor = QHighDpiScaling::factor(window); |
| QRegion pointRegion; |
| for (const QRectF &rect : pixelRegion) { |
| const QPointF topLeftP = rect.topLeft() / scaleFactor; |
| const QSizeF sizeP = rect.size() / scaleFactor; |
| pointRegion += QRect(QPoint(qFloor(topLeftP.x()), qFloor(topLeftP.y())), |
| QPoint(qCeil(topLeftP.x() + sizeP.width() - 1.0), |
| qCeil(topLeftP.y() + sizeP.height() - 1.0))); |
| } |
| return pointRegion; |
| } |
| |
| inline QRegion toNativeLocalRegion(const QRegion &pointRegion, const QWindow *window) |
| { |
| return scale(pointRegion, QHighDpiScaling::factor(window)); |
| } |
| |
| } // namespace QHighDpi |
| #else // QT_NO_HIGHDPISCALING |
| class Q_GUI_EXPORT QHighDpiScaling { |
| public: |
| static inline void initHighDpiScaling() {} |
| static inline void updateHighDpiScaling() {} |
| static inline void setGlobalFactor(qreal) {} |
| static inline void setScreenFactor(QScreen *, qreal) {} |
| |
| static inline bool isActive() { return false; } |
| static inline qreal factor(const QWindow *) { return 1.0; } |
| static inline qreal factor(const QScreen *) { return 1.0; } |
| static inline qreal factor(const QPlatformScreen *) { return 1.0; } |
| static inline QPoint origin(const QScreen *) { return QPoint(); } |
| static inline QPoint origin(const QPlatformScreen *) { return QPoint(); } |
| static inline QPoint mapPositionFromNative(const QPoint &pos, const QPlatformScreen *) { return pos; } |
| static inline QPoint mapPositionToNative(const QPoint &pos, const QPlatformScreen *) { return pos; } |
| static inline QPoint mapPositionToGlobal(const QPoint &pos, const QPoint &windowGlobalPosition, const QWindow *window) { return pos; } |
| static inline QPoint mapPositionFromGlobal(const QPoint &pos, const QPoint &windowGlobalPosition, const QWindow *window) { return pos; } |
| static inline QDpi logicalDpi() { return QDpi(-1,-1); } |
| }; |
| |
| namespace QHighDpi { |
| template <typename T> inline |
| T toNative(const T &value, ...) { return value; } |
| template <typename T> inline |
| T fromNative(const T &value, ...) { return value; } |
| |
| template <typename T> inline |
| T fromNativeLocalPosition(const T &value, ...) { return value; } |
| template <typename T> inline |
| T toNativeLocalPosition(const T &value, ...) { return value; } |
| |
| template <typename T> inline |
| T fromNativeLocalRegion(const T &value, ...) { return value; } |
| template <typename T> inline |
| T fromNativeLocalExposedRegion(const T &value, ...) { return value; } |
| template <typename T> inline |
| T toNativeLocalRegion(const T &value, ...) { return value; } |
| |
| template <typename T> inline |
| T fromNativeScreenGeometry(const T &value, ...) { return value; } |
| |
| template <typename T, typename U> inline |
| T toNativePixels(const T &value, const U*) {return value;} |
| template <typename T, typename U> inline |
| T fromNativePixels(const T &value, const U*) {return value;} |
| } |
| #endif // QT_NO_HIGHDPISCALING |
| QT_END_NAMESPACE |
| |
| #endif // QHIGHDPISCALING_P_H |