diff options
Diffstat (limited to 'src/gui/kernel/qplatformscreen.cpp')
| -rw-r--r-- | src/gui/kernel/qplatformscreen.cpp | 136 |
1 files changed, 126 insertions, 10 deletions
diff --git a/src/gui/kernel/qplatformscreen.cpp b/src/gui/kernel/qplatformscreen.cpp index 71710d1cb1..edf546799f 100644 --- a/src/gui/kernel/qplatformscreen.cpp +++ b/src/gui/kernel/qplatformscreen.cpp @@ -1,7 +1,7 @@ /**************************************************************************** ** -** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies). -** Contact: http://www.qt-project.org/legal +** Copyright (C) 2015 The Qt Company Ltd. +** Contact: http://www.qt.io/licensing/ ** ** This file is part of the QtGui module of the Qt Toolkit. ** @@ -10,9 +10,9 @@ ** Licensees holding valid commercial Qt licenses may use this file in ** accordance with the commercial license agreement provided with the ** Software or, alternatively, in accordance with the terms contained in -** a written agreement between you and Digia. For licensing terms and -** conditions see http://qt.digia.com/licensing. For further information -** use the contact form at http://qt.digia.com/contact-us. +** a written agreement between you and The Qt Company. For licensing terms +** and conditions see http://www.qt.io/terms-conditions. For further +** information use the contact form at http://www.qt.io/contact-us. ** ** GNU Lesser General Public License Usage ** Alternatively, this file may be used under the terms of the GNU Lesser @@ -23,8 +23,8 @@ ** requirements will be met: https://www.gnu.org/licenses/lgpl.html and ** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. ** -** In addition, as a special exception, Digia gives you certain additional -** rights. These rights are described in the Digia Qt LGPL Exception +** As a special exception, The Qt Company gives you certain additional +** rights. These rights are described in The Qt Company LGPL Exception ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. ** ** $QT_END_LICENSE$ @@ -32,6 +32,7 @@ ****************************************************************************/ #include "qplatformscreen.h" +#include <QtCore/qdebug.h> #include <QtGui/qguiapplication.h> #include <qpa/qplatformcursor.h> #include <QtGui/private/qguiapplication_p.h> @@ -52,9 +53,11 @@ QPlatformScreen::QPlatformScreen() QPlatformScreen::~QPlatformScreen() { Q_D(QPlatformScreen); - - QGuiApplicationPrivate::screen_list.removeOne(d->screen); - delete d->screen; + if (d->screen) { + qWarning("Manually deleting a QPlatformScreen. Call QPlatformIntegration::destroyScreen instead."); + QGuiApplicationPrivate::screen_list.removeOne(d->screen); + delete d->screen; + } } /*! @@ -304,4 +307,117 @@ void QPlatformScreen::resizeMaximizedWindows() } } +// i must be power of two +static int log2(uint i) +{ + if (i == 0) + return -1; + + int result = 0; + while (!(i & 1)) { + ++result; + i >>= 1; + } + return result; +} + +int QPlatformScreen::angleBetween(Qt::ScreenOrientation a, Qt::ScreenOrientation b) +{ + if (a == Qt::PrimaryOrientation || b == Qt::PrimaryOrientation) { + qWarning() << "Use QScreen version of" << __FUNCTION__ << "when passing Qt::PrimaryOrientation"; + return 0; + } + + if (a == b) + return 0; + + int ia = log2(uint(a)); + int ib = log2(uint(b)); + + int delta = ia - ib; + + if (delta < 0) + delta = delta + 4; + + int angles[] = { 0, 90, 180, 270 }; + return angles[delta]; +} + +QTransform QPlatformScreen::transformBetween(Qt::ScreenOrientation a, Qt::ScreenOrientation b, const QRect &target) +{ + if (a == Qt::PrimaryOrientation || b == Qt::PrimaryOrientation) { + qWarning() << "Use QScreen version of" << __FUNCTION__ << "when passing Qt::PrimaryOrientation"; + return QTransform(); + } + + if (a == b) + return QTransform(); + + int angle = angleBetween(a, b); + + QTransform result; + switch (angle) { + case 90: + result.translate(target.width(), 0); + break; + case 180: + result.translate(target.width(), target.height()); + break; + case 270: + result.translate(0, target.height()); + break; + default: + Q_ASSERT(false); + } + result.rotate(angle); + + return result; +} + +QRect QPlatformScreen::mapBetween(Qt::ScreenOrientation a, Qt::ScreenOrientation b, const QRect &rect) +{ + if (a == Qt::PrimaryOrientation || b == Qt::PrimaryOrientation) { + qWarning() << "Use QScreen version of" << __FUNCTION__ << "when passing Qt::PrimaryOrientation"; + return rect; + } + + if (a == b) + return rect; + + if ((a == Qt::PortraitOrientation || a == Qt::InvertedPortraitOrientation) + != (b == Qt::PortraitOrientation || b == Qt::InvertedPortraitOrientation)) + { + return QRect(rect.y(), rect.x(), rect.height(), rect.width()); + } + + return rect; +} + +/*! + Returns a hint about this screen's subpixel layout structure. + + The default implementation queries the \b{QT_SUBPIXEL_AA_TYPE} env variable. + This is just a hint because most platforms don't have a way to retrieve the correct value from hardware + and instead rely on font configurations. +*/ +QPlatformScreen::SubpixelAntialiasingType QPlatformScreen::subpixelAntialiasingTypeHint() const +{ + static int type = -1; + if (type == -1) { + QByteArray env = qgetenv("QT_SUBPIXEL_AA_TYPE"); + if (env == "RGB") + type = QPlatformScreen::Subpixel_RGB; + else if (env == "BGR") + type = QPlatformScreen::Subpixel_BGR; + else if (env == "VRGB") + type = QPlatformScreen::Subpixel_VRGB; + else if (env == "VBGR") + type = QPlatformScreen::Subpixel_VBGR; + else + type = QPlatformScreen::Subpixel_None; + } + + return static_cast<QPlatformScreen::SubpixelAntialiasingType>(type); +} + QT_END_NAMESPACE |