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Diffstat (limited to 'src/gui/opengl/qopenglpaintdevice.cpp')
| -rw-r--r-- | src/gui/opengl/qopenglpaintdevice.cpp | 372 |
1 files changed, 0 insertions, 372 deletions
diff --git a/src/gui/opengl/qopenglpaintdevice.cpp b/src/gui/opengl/qopenglpaintdevice.cpp deleted file mode 100644 index 3920a10467..0000000000 --- a/src/gui/opengl/qopenglpaintdevice.cpp +++ /dev/null @@ -1,372 +0,0 @@ -/**************************************************************************** -** -** Copyright (C) 2016 The Qt Company Ltd. -** Contact: https://www.qt.io/licensing/ -** -** This file is part of the QtGui module of the Qt Toolkit. -** -** $QT_BEGIN_LICENSE:LGPL$ -** Commercial License Usage -** 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 The Qt Company. For licensing terms -** and conditions see https://www.qt.io/terms-conditions. For further -** information use the contact form at https://www.qt.io/contact-us. -** -** GNU Lesser General Public License Usage -** Alternatively, this file may be used under the terms of the GNU Lesser -** General Public License version 3 as published by the Free Software -** Foundation and appearing in the file LICENSE.LGPL3 included in the -** packaging of this file. Please review the following information to -** ensure the GNU Lesser General Public License version 3 requirements -** will be met: https://www.gnu.org/licenses/lgpl-3.0.html. -** -** GNU General Public License Usage -** Alternatively, this file may be used under the terms of the GNU -** General Public License version 2.0 or (at your option) the GNU General -** Public license version 3 or any later version approved by the KDE Free -** Qt Foundation. The licenses are as published by the Free Software -** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3 -** included in the packaging of this file. Please review the following -** information to ensure the GNU General Public License requirements will -** be met: https://www.gnu.org/licenses/gpl-2.0.html and -** https://www.gnu.org/licenses/gpl-3.0.html. -** -** $QT_END_LICENSE$ -** -****************************************************************************/ - -#include <qopenglpaintdevice.h> -#include <qpaintengine.h> -#include <qthreadstorage.h> - -#include <private/qopenglpaintdevice_p.h> -#include <private/qobject_p.h> -#include <private/qopenglcontext_p.h> -#include <private/qopenglframebufferobject_p.h> -#include <private/qopenglpaintengine_p.h> - -// for qt_defaultDpiX/Y -#include <private/qfont_p.h> - -#include <qopenglfunctions.h> - -QT_BEGIN_NAMESPACE - -/*! - \class QOpenGLPaintDevice - \brief The QOpenGLPaintDevice class enables painting to an OpenGL context using QPainter. - \since 5.0 - \inmodule QtGui - - \ingroup painting-3D - - The QOpenGLPaintDevice uses the \b current QOpenGL context to render - QPainter draw commands. The context is captured upon construction. It - requires support for OpenGL (ES) 2.0 or higher. - - \section1 Performance - - The QOpenGLPaintDevice is almost always hardware accelerated and - has the potential of being much faster than software - rasterization. However, it is more sensitive to state changes, and - therefore requires the drawing commands to be carefully ordered to - achieve optimal performance. - - \section1 Antialiasing and Quality - - Antialiasing in the OpenGL paint engine is done using - multisampling. Most hardware require significantly more memory to - do multisampling and the resulting quality is not on par with the - quality of the software paint engine. The OpenGL paint engine's - strength lies in its performance, not its visual rendering - quality. - - \section1 State Changes - - When painting to a QOpenGLPaintDevice using QPainter, the state of - the current OpenGL context will be altered by the paint engine to - reflect its needs. Applications should not rely upon the OpenGL - state being reset to its original conditions, particularly the - current shader program, OpenGL viewport, texture units, and - drawing modes. - - \section1 Mixing QPainter and OpenGL - - When intermixing QPainter and OpenGL, it is important to notify - QPainter that the OpenGL state may have been cluttered so it can - restore its internal state. This is achieved by calling \l - QPainter::beginNativePainting() before starting the OpenGL - rendering and calling \l QPainter::endNativePainting() after - finishing. - - \sa {OpenGL Window Example} - -*/ - -/*! - Constructs a QOpenGLPaintDevice. - - The QOpenGLPaintDevice is only valid for the current context. - - \sa QOpenGLContext::currentContext() -*/ -QOpenGLPaintDevice::QOpenGLPaintDevice() - : d_ptr(new QOpenGLPaintDevicePrivate(QSize())) -{ -} - -/*! - Constructs a QOpenGLPaintDevice with the given \a size. - - The QOpenGLPaintDevice is only valid for the current context. - - \sa QOpenGLContext::currentContext() -*/ -QOpenGLPaintDevice::QOpenGLPaintDevice(const QSize &size) - : d_ptr(new QOpenGLPaintDevicePrivate(size)) -{ -} - -/*! - Constructs a QOpenGLPaintDevice with the given \a width and \a height. - - The QOpenGLPaintDevice is only valid for the current context. - - \sa QOpenGLContext::currentContext() -*/ -QOpenGLPaintDevice::QOpenGLPaintDevice(int width, int height) - : QOpenGLPaintDevice(QSize(width, height)) -{ -} - -/*! - \internal - */ -QOpenGLPaintDevice::QOpenGLPaintDevice(QOpenGLPaintDevicePrivate &dd) - : d_ptr(&dd) -{ -} - -/*! - Destroys the QOpenGLPaintDevice. -*/ - -QOpenGLPaintDevice::~QOpenGLPaintDevice() -{ - delete d_ptr->engine; -} - -/*! - \fn int QOpenGLPaintDevice::devType() const - \internal - \reimp -*/ - -QOpenGLPaintDevicePrivate::QOpenGLPaintDevicePrivate(const QSize &sz) - : size(sz) - , ctx(QOpenGLContext::currentContext()) - , dpmx(qt_defaultDpiX() * 100. / 2.54) - , dpmy(qt_defaultDpiY() * 100. / 2.54) - , devicePixelRatio(1.0) - , flipped(false) - , engine(nullptr) -{ -} - -QOpenGLPaintDevicePrivate::~QOpenGLPaintDevicePrivate() -{ -} - -class QOpenGLEngineThreadStorage -{ -public: - QPaintEngine *engine() { - QPaintEngine *&localEngine = storage.localData(); - if (!localEngine) - localEngine = new QOpenGL2PaintEngineEx; - return localEngine; - } - -private: - QThreadStorage<QPaintEngine *> storage; -}; - -Q_GLOBAL_STATIC(QOpenGLEngineThreadStorage, qt_opengl_engine) - -/*! - \reimp -*/ - -QPaintEngine *QOpenGLPaintDevice::paintEngine() const -{ - if (d_ptr->engine) - return d_ptr->engine; - - QPaintEngine *engine = qt_opengl_engine()->engine(); - if (engine->isActive() && engine->paintDevice() != this) { - d_ptr->engine = new QOpenGL2PaintEngineEx; - return d_ptr->engine; - } - - return engine; -} - -/*! - Returns the OpenGL context associated with the paint device. -*/ - -QOpenGLContext *QOpenGLPaintDevice::context() const -{ - return d_ptr->ctx; -} - -/*! - Returns the pixel size of the paint device. - - \sa setSize() -*/ - -QSize QOpenGLPaintDevice::size() const -{ - return d_ptr->size; -} - -/*! - Sets the pixel size of the paint device to \a size. - - \sa size() -*/ - -void QOpenGLPaintDevice::setSize(const QSize &size) -{ - d_ptr->size = size; -} - -/*! - Sets the device pixel ratio for the paint device to \a devicePixelRatio. -*/ -void QOpenGLPaintDevice::setDevicePixelRatio(qreal devicePixelRatio) -{ - d_ptr->devicePixelRatio = devicePixelRatio; -} - -/*! - \reimp -*/ - -int QOpenGLPaintDevice::metric(QPaintDevice::PaintDeviceMetric metric) const -{ - switch (metric) { - case PdmWidth: - return d_ptr->size.width(); - case PdmHeight: - return d_ptr->size.height(); - case PdmDepth: - return 32; - case PdmWidthMM: - return qRound(d_ptr->size.width() * 1000 / d_ptr->dpmx); - case PdmHeightMM: - return qRound(d_ptr->size.height() * 1000 / d_ptr->dpmy); - case PdmNumColors: - return 0; - case PdmDpiX: - return qRound(d_ptr->dpmx * 0.0254); - case PdmDpiY: - return qRound(d_ptr->dpmy * 0.0254); - case PdmPhysicalDpiX: - return qRound(d_ptr->dpmx * 0.0254); - case PdmPhysicalDpiY: - return qRound(d_ptr->dpmy * 0.0254); - case PdmDevicePixelRatio: - return d_ptr->devicePixelRatio; - case PdmDevicePixelRatioScaled: - return d_ptr->devicePixelRatio * QPaintDevice::devicePixelRatioFScale(); - - default: - qWarning("QOpenGLPaintDevice::metric() - metric %d not known", metric); - return 0; - } -} - -/*! - Returns the number of pixels per meter horizontally. - - \sa setDotsPerMeterX() -*/ - -qreal QOpenGLPaintDevice::dotsPerMeterX() const -{ - return d_ptr->dpmx; -} - -/*! - Returns the number of pixels per meter vertically. - - \sa setDotsPerMeterY() -*/ - -qreal QOpenGLPaintDevice::dotsPerMeterY() const -{ - return d_ptr->dpmy; -} - -/*! - Sets the number of pixels per meter horizontally to \a dpmx. - - \sa dotsPerMeterX() -*/ - -void QOpenGLPaintDevice::setDotsPerMeterX(qreal dpmx) -{ - d_ptr->dpmx = dpmx; -} - -/*! - Sets the number of pixels per meter vertically to \a dpmy. - - \sa dotsPerMeterY() -*/ - -void QOpenGLPaintDevice::setDotsPerMeterY(qreal dpmy) -{ - d_ptr->dpmx = dpmy; -} - -/*! - Sets whether painting should be flipped around the Y-axis or not to \a flipped. - - \sa paintFlipped() -*/ -void QOpenGLPaintDevice::setPaintFlipped(bool flipped) -{ - d_ptr->flipped = flipped; -} - -/*! - Returns \c true if painting is flipped around the Y-axis. - - \sa setPaintFlipped() -*/ - -bool QOpenGLPaintDevice::paintFlipped() const -{ - return d_ptr->flipped; -} - -/*! - This virtual method is provided as a callback to allow re-binding a target - frame buffer object or context when different QOpenGLPaintDevice instances - are issuing draw calls alternately. - - \l{QPainter::beginNativePainting()}{beginNativePainting()} will also trigger - this method. - - The default implementation does nothing. -*/ -void QOpenGLPaintDevice::ensureActiveTarget() -{ -} - -QT_END_NAMESPACE |