Added QPlatformWindowFormat

Its mostly a copy of QGLFormat

Only plugin that uses it is the openkode, and thats just a poc.

1 files changed, 1283 insertions, 0 deletions

diff --git a/src/gui/kernel/qplatformwindowformat_qpa.cpp b/src/gui/kernel/qplatformwindowformat_qpa.cpp
new file mode 100644
index 0000000..4ded26b
--- /dev/null
+++ b/src/gui/kernel/qplatformwindowformat_qpa.cpp
@@ -0,0 +1,1283 @@
+/****************************************************************************
+**
+** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the QtGui module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights.  These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qplatformwindowformat_qpa.h"
+
+Q_GLOBAL_STATIC(QPlatformWindowFormat, q_platformwindow_default_format);
+
+class QPlatformWindowFormatPrivate
+{
+public:
+    QPlatformWindowFormatPrivate()
+        : ref(1)
+        , opts(QPlatformWindowFormat::DoubleBuffer | QPlatformWindowFormat::DepthBuffer
+             | QPlatformWindowFormat::Rgba | QPlatformWindowFormat::DirectRendering
+             | QPlatformWindowFormat::StencilBuffer | QPlatformWindowFormat::DeprecatedFunctions)
+        , depthSize(-1)
+        , accumSize(-1)
+        , stencilSize(-1)
+        , redSize(-1)
+        , greenSize(-1)
+        , blueSize(-1)
+        , alphaSize(-1)
+        , numSamples(-1)
+        , swapInterval(-1)
+        , majorVersion(1)
+        , minorVersion(0)
+        , profile(QPlatformWindowFormat::NoProfile)
+    {
+    }
+
+    QPlatformWindowFormatPrivate(const QPlatformWindowFormatPrivate *other)
+        : ref(1),
+          opts(other->opts),
+          depthSize(other->depthSize),
+          accumSize(other->accumSize),
+          stencilSize(other->stencilSize),
+          redSize(other->redSize),
+          greenSize(other->greenSize),
+          blueSize(other->blueSize),
+          alphaSize(other->alphaSize),
+          numSamples(other->numSamples),
+          swapInterval(other->swapInterval),
+          majorVersion(other->majorVersion),
+          minorVersion(other->minorVersion),
+          profile(other->profile)
+    {
+    }
+    QAtomicInt ref;
+    QPlatformWindowFormat::FormatOptions opts;
+    int depthSize;
+    int accumSize;
+    int stencilSize;
+    int redSize;
+    int greenSize;
+    int blueSize;
+    int alphaSize;
+    int numSamples;
+    int swapInterval;
+    int majorVersion;
+    int minorVersion;
+    QPlatformWindowFormat::OpenGLContextProfile profile;
+};
+
+/*!
+    \class QGLFormat
+    \brief The QGLFormat class specifies the display format of an OpenGL
+    rendering context.
+
+    \ingroup painting-3D
+
+    A display format has several characteristics:
+    \list
+    \i \link setDoubleBuffer() Double or single buffering.\endlink
+    \i \link setDepth() Depth buffer.\endlink
+    \i \link setRgba() RGBA or color index mode.\endlink
+    \i \link setAlpha() Alpha channel.\endlink
+    \i \link setAccum() Accumulation buffer.\endlink
+    \i \link setStencil() Stencil buffer.\endlink
+    \i \link setStereo() Stereo buffers.\endlink
+    \i \link setDirectRendering() Direct rendering.\endlink
+    \i \link setOverlay() Presence of an overlay.\endlink
+    \i \link setPlane() Plane of an overlay.\endlink
+    \i \link setSampleBuffers() Multisample buffers.\endlink
+    \endlist
+
+    You can also specify preferred bit depths for the color buffer,
+    depth buffer, alpha buffer, accumulation buffer and the stencil
+    buffer with the functions: setRedBufferSize(), setGreenBufferSize(),
+    setBlueBufferSize(), setDepthBufferSize(), setAlphaBufferSize(),
+    setAccumBufferSize() and setStencilBufferSize().
+
+    Note that even if you specify that you prefer a 32 bit depth
+    buffer (e.g. with setDepthBufferSize(32)), the format that is
+    chosen may not have a 32 bit depth buffer, even if there is a
+    format available with a 32 bit depth buffer. The main reason for
+    this is how the system dependant picking algorithms work on the
+    different platforms, and some format options may have higher
+    precedence than others.
+
+    You create and tell a QGLFormat object what rendering options you
+    want from an OpenGL rendering context.
+
+    OpenGL drivers or accelerated hardware may or may not support
+    advanced features such as alpha channel or stereographic viewing.
+    If you request some features that the driver/hardware does not
+    provide when you create a QGLWidget, you will get a rendering
+    context with the nearest subset of features.
+
+    There are different ways to define the display characteristics of
+    a rendering context. One is to create a QGLFormat and make it the
+    default for the entire application:
+    \snippet doc/src/snippets/code/src_opengl_qgl.cpp 0
+
+    Or you can specify the desired format when creating an object of
+    your QGLWidget subclass:
+    \snippet doc/src/snippets/code/src_opengl_qgl.cpp 1
+
+    After the widget has been created, you can find out which of the
+    requested features the system was able to provide:
+    \snippet doc/src/snippets/code/src_opengl_qgl.cpp 2
+
+    \legalese
+        OpenGL is a trademark of Silicon Graphics, Inc. in the
+        United States and other countries.
+    \endlegalese
+
+    \sa QGLContext, QGLWidget
+*/
+
+/*!
+    Constructs a QGLFormat object with the following default settings:
+    \list
+    \i \link setDoubleBuffer() Double buffer:\endlink Enabled.
+    \i \link setDepth() Depth buffer:\endlink Enabled.
+    \i \link setRgba() RGBA:\endlink Enabled (i.e., color index disabled).
+    \i \link setAlpha() Alpha channel:\endlink Disabled.
+    \i \link setAccum() Accumulator buffer:\endlink Disabled.
+    \i \link setStencil() Stencil buffer:\endlink Enabled.
+    \i \link setStereo() Stereo:\endlink Disabled.
+    \i \link setDirectRendering() Direct rendering:\endlink Enabled.
+    \i \link setOverlay() Overlay:\endlink Disabled.
+    \i \link setPlane() Plane:\endlink 0 (i.e., normal plane).
+    \i \link setSampleBuffers() Multisample buffers:\endlink Disabled.
+    \endlist
+*/
+
+QPlatformWindowFormat::QPlatformWindowFormat()
+{
+    d = new QPlatformWindowFormatPrivate;
+}
+
+
+/*!
+    Creates a QGLFormat object that is a copy of the current
+    defaultFormat().
+
+    If \a options is not 0, the default format is modified by the
+    specified format options. The \a options parameter should be
+    QGL::FormatOption values OR'ed together.
+
+    This constructor makes it easy to specify a certain desired format
+    in classes derived from QGLWidget, for example:
+    \snippet doc/src/snippets/code/src_opengl_qgl.cpp 3
+
+    Note that there are QGL::FormatOption values to turn format settings
+    both on and off, e.g. QGL::DepthBuffer and QGL::NoDepthBuffer,
+    QGL::DirectRendering and QGL::IndirectRendering, etc.
+
+    The \a plane parameter defaults to 0 and is the plane which this
+    format should be associated with. Not all OpenGL implementations
+    supports overlay/underlay rendering planes.
+
+    \sa defaultFormat(), setOption(), setPlane()
+*/
+
+QPlatformWindowFormat::QPlatformWindowFormat(QPlatformWindowFormat::FormatOptions options)
+{
+    d = new QPlatformWindowFormatPrivate;
+    QPlatformWindowFormat::FormatOptions newOpts = options;
+    d->opts = defaultFormat().d->opts;
+    d->opts |= (newOpts & 0xffff);
+    d->opts &= ~(newOpts >> 16);
+}
+
+/*!
+    \internal
+*/
+void QPlatformWindowFormat::detach()
+{
+    if (d->ref != 1) {
+        QPlatformWindowFormatPrivate *newd = new QPlatformWindowFormatPrivate(d);
+        if (!d->ref.deref())
+            delete d;
+        d = newd;
+    }
+}
+
+/*!
+    Constructs a copy of \a other.
+*/
+
+QPlatformWindowFormat::QPlatformWindowFormat(const QPlatformWindowFormat &other)
+{
+    d = other.d;
+    d->ref.ref();
+}
+
+/*!
+    Assigns \a other to this object.
+*/
+
+QPlatformWindowFormat &QPlatformWindowFormat::operator=(const QPlatformWindowFormat &other)
+{
+    if (d != other.d) {
+        other.d->ref.ref();
+        if (!d->ref.deref())
+            delete d;
+        d = other.d;
+    }
+    return *this;
+}
+
+/*!
+    Destroys the QGLFormat.
+*/
+QPlatformWindowFormat::~QPlatformWindowFormat()
+{
+    if (!d->ref.deref())
+        delete d;
+}
+
+/*!
+    \fn bool QGLFormat::doubleBuffer() const
+
+    Returns true if double buffering is enabled; otherwise returns
+    false. Double buffering is enabled by default.
+
+    \sa setDoubleBuffer()
+*/
+
+/*!
+    If \a enable is true sets double buffering; otherwise sets single
+    buffering.
+
+    Double buffering is enabled by default.
+
+    Double buffering is a technique where graphics are rendered on an
+    off-screen buffer and not directly to the screen. When the drawing
+    has been completed, the program calls a swapBuffers() function to
+    exchange the screen contents with the buffer. The result is
+    flicker-free drawing and often better performance.
+
+    \sa doubleBuffer(), QGLContext::swapBuffers(),
+    QGLWidget::swapBuffers()
+*/
+
+void QPlatformWindowFormat::setDoubleBuffer(bool enable)
+{
+    setOption(enable ? QPlatformWindowFormat::DoubleBuffer : QPlatformWindowFormat::SingleBuffer);
+}
+
+
+/*!
+    \fn bool QGLFormat::depth() const
+
+    Returns true if the depth buffer is enabled; otherwise returns
+    false. The depth buffer is enabled by default.
+
+    \sa setDepth(), setDepthBufferSize()
+*/
+
+/*!
+    If \a enable is true enables the depth buffer; otherwise disables
+    the depth buffer.
+
+    The depth buffer is enabled by default.
+
+    The purpose of a depth buffer (or Z-buffering) is to remove hidden
+    surfaces. Pixels are assigned Z values based on the distance to
+    the viewer. A pixel with a high Z value is closer to the viewer
+    than a pixel with a low Z value. This information is used to
+    decide whether to draw a pixel or not.
+
+    \sa depth(), setDepthBufferSize()
+*/
+
+void QPlatformWindowFormat::setDepth(bool enable)
+{
+    setOption(enable ? QPlatformWindowFormat::DepthBuffer : QPlatformWindowFormat::NoDepthBuffer);
+}
+
+
+/*!
+    \fn bool QGLFormat::rgba() const
+
+    Returns true if RGBA color mode is set. Returns false if color
+    index mode is set. The default color mode is RGBA.
+
+    \sa setRgba()
+*/
+
+/*!
+    If \a enable is true sets RGBA mode. If \a enable is false sets
+    color index mode.
+
+    The default color mode is RGBA.
+
+    RGBA is the preferred mode for most OpenGL applications. In RGBA
+    color mode you specify colors as red + green + blue + alpha
+    quadruplets.
+
+    In color index mode you specify an index into a color lookup
+    table.
+
+    \sa rgba()
+*/
+
+void QPlatformWindowFormat::setRgba(bool enable)
+{
+    setOption(enable ? QPlatformWindowFormat::Rgba : QPlatformWindowFormat::ColorIndex);
+}
+
+
+/*!
+    \fn bool QGLFormat::alpha() const
+
+    Returns true if the alpha buffer in the framebuffer is enabled;
+    otherwise returns false. The alpha buffer is disabled by default.
+
+    \sa setAlpha(), setAlphaBufferSize()
+*/
+
+/*!
+    If \a enable is true enables the alpha buffer; otherwise disables
+    the alpha buffer.
+
+    The alpha buffer is disabled by default.
+
+    The alpha buffer is typically used for implementing transparency
+    or translucency. The A in RGBA specifies the transparency of a
+    pixel.
+
+    \sa alpha(), setAlphaBufferSize()
+*/
+
+void QPlatformWindowFormat::setAlpha(bool enable)
+{
+    setOption(enable ? QPlatformWindowFormat::AlphaChannel : QPlatformWindowFormat::NoAlphaChannel);
+}
+
+
+/*!
+    \fn bool QGLFormat::accum() const
+
+    Returns true if the accumulation buffer is enabled; otherwise
+    returns false. The accumulation buffer is disabled by default.
+
+    \sa setAccum(), setAccumBufferSize()
+*/
+
+/*!
+    If \a enable is true enables the accumulation buffer; otherwise
+    disables the accumulation buffer.
+
+    The accumulation buffer is disabled by default.
+
+    The accumulation buffer is used to create blur effects and
+    multiple exposures.
+
+    \sa accum(), setAccumBufferSize()
+*/
+
+void QPlatformWindowFormat::setAccum(bool enable)
+{
+    setOption(enable ? QPlatformWindowFormat::AccumBuffer : QPlatformWindowFormat::NoAccumBuffer);
+}
+
+
+/*!
+    \fn bool QGLFormat::stencil() const
+
+    Returns true if the stencil buffer is enabled; otherwise returns
+    false. The stencil buffer is enabled by default.
+
+    \sa setStencil(), setStencilBufferSize()
+*/
+
+/*!
+    If \a enable is true enables the stencil buffer; otherwise
+    disables the stencil buffer.
+
+    The stencil buffer is enabled by default.
+
+    The stencil buffer masks certain parts of the drawing area so that
+    masked parts are not drawn on.
+
+    \sa stencil(), setStencilBufferSize()
+*/
+
+void QPlatformWindowFormat::setStencil(bool enable)
+{
+    setOption(enable ? QPlatformWindowFormat::StencilBuffer: QPlatformWindowFormat::NoStencilBuffer);
+}
+
+
+/*!
+    \fn bool QGLFormat::stereo() const
+
+    Returns true if stereo buffering is enabled; otherwise returns
+    false. Stereo buffering is disabled by default.
+
+    \sa setStereo()
+*/
+
+/*!
+    If \a enable is true enables stereo buffering; otherwise disables
+    stereo buffering.
+
+    Stereo buffering is disabled by default.
+
+    Stereo buffering provides extra color buffers to generate left-eye
+    and right-eye images.
+
+    \sa stereo()
+*/
+
+void QPlatformWindowFormat::setStereo(bool enable)
+{
+    setOption(enable ? QPlatformWindowFormat::StereoBuffers : QPlatformWindowFormat::NoStereoBuffers);
+}
+
+
+/*!
+    \fn bool QGLFormat::directRendering() const
+
+    Returns true if direct rendering is enabled; otherwise returns
+    false.
+
+    Direct rendering is enabled by default.
+
+    \sa setDirectRendering()
+*/
+
+/*!
+    If \a enable is true enables direct rendering; otherwise disables
+    direct rendering.
+
+    Direct rendering is enabled by default.
+
+    Enabling this option will make OpenGL bypass the underlying window
+    system and render directly from hardware to the screen, if this is
+    supported by the system.
+
+    \sa directRendering()
+*/
+
+void QPlatformWindowFormat::setDirectRendering(bool enable)
+{
+    setOption(enable ? QPlatformWindowFormat::DirectRendering : QPlatformWindowFormat::IndirectRendering);
+}
+
+/*!
+    \fn bool QGLFormat::sampleBuffers() const
+
+    Returns true if multisample buffer support is enabled; otherwise
+    returns false.
+
+    The multisample buffer is disabled by default.
+
+    \sa setSampleBuffers()
+*/
+
+/*!
+    If \a enable is true, a GL context with multisample buffer support
+    is picked; otherwise ignored.
+
+    \sa sampleBuffers(), setSamples(), samples()
+*/
+void QPlatformWindowFormat::setSampleBuffers(bool enable)
+{
+    setOption(enable ? QPlatformWindowFormat::SampleBuffers : QPlatformWindowFormat::NoSampleBuffers);
+}
+
+/*!
+    Returns the number of samples per pixel when multisampling is
+    enabled. By default, the highest number of samples that is
+    available is used.
+
+    \sa setSampleBuffers(), sampleBuffers(), setSamples()
+*/
+int QPlatformWindowFormat::samples() const
+{
+   return d->numSamples;
+}
+
+/*!
+    Set the preferred number of samples per pixel when multisampling
+    is enabled to \a numSamples. By default, the highest number of
+    samples available is used.
+
+    \sa setSampleBuffers(), sampleBuffers(), samples()
+*/
+void QPlatformWindowFormat::setSamples(int numSamples)
+{
+    detach();
+    if (numSamples < 0) {
+        qWarning("QGLFormat::setSamples: Cannot have negative number of samples per pixel %d", numSamples);
+        return;
+    }
+    d->numSamples = numSamples;
+    setSampleBuffers(numSamples > 0);
+}
+
+/*!
+    \since 4.2
+
+    Set the preferred swap interval. This can be used to sync the GL
+    drawing into a system window to the vertical refresh of the screen.
+    Setting an \a interval value of 0 will turn the vertical refresh syncing
+    off, any value higher than 0 will turn the vertical syncing on.
+
+    Under Windows and under X11, where the \c{WGL_EXT_swap_control}
+    and \c{GLX_SGI_video_sync} extensions are used, the \a interval
+    parameter can be used to set the minimum number of video frames
+    that are displayed before a buffer swap will occur. In effect,
+    setting the \a interval to 10, means there will be 10 vertical
+    retraces between every buffer swap.
+
+    Under Windows the \c{WGL_EXT_swap_control} extension has to be present,
+    and under X11 the \c{GLX_SGI_video_sync} extension has to be present.
+*/
+void QPlatformWindowFormat::setSwapInterval(int interval)
+{
+    detach();
+    d->swapInterval = interval;
+}
+
+/*!
+    \since 4.2
+
+    Returns the currently set swap interval. -1 is returned if setting
+    the swap interval isn't supported in the system GL implementation.
+*/
+int QPlatformWindowFormat::swapInterval() const
+{
+    return d->swapInterval;
+}
+
+///*!
+//    \fn bool QGLFormat::hasOverlay() const
+
+//    Returns true if overlay plane is enabled; otherwise returns false.
+
+//    Overlay is disabled by default.
+
+//    \sa setOverlay()
+//*/
+
+///*!
+//    If \a enable is true enables an overlay plane; otherwise disables
+//    the overlay plane.
+
+//    Enabling the overlay plane will cause QGLWidget to create an
+//    additional context in an overlay plane. See the QGLWidget
+//    documentation for further information.
+
+//    \sa hasOverlay()
+//*/
+
+//void QPlatformWindowFormat::setOverlay(bool enable)
+//{
+//    setOption(enable ? QPlatformWindowFormat::HasOverlay : QPlatformWindowFormat::NoOverlay);
+//}
+
+/*!
+    Sets the format option to \a opt.
+
+    \sa testOption()
+*/
+
+void QPlatformWindowFormat::setOption(QPlatformWindowFormat::FormatOptions opt)
+{
+    detach();
+    if (opt & 0xffff)
+        d->opts |= opt;
+    else
+       d->opts &= ~(opt >> 16);
+}
+
+
+
+/*!
+    Returns true if format option \a opt is set; otherwise returns false.
+
+    \sa setOption()
+*/
+
+bool QPlatformWindowFormat::testOption(QPlatformWindowFormat::FormatOptions opt) const
+{
+    if (opt & 0xffff)
+       return (d->opts & opt) != 0;
+    else
+       return (d->opts & (opt >> 16)) == 0;
+}
+
+/*!
+    Set the minimum depth buffer size to \a size.
+
+    \sa depthBufferSize(), setDepth(), depth()
+*/
+void QPlatformWindowFormat::setDepthBufferSize(int size)
+{
+    detach();
+    if (size < 0) {
+        qWarning("QGLFormat::setDepthBufferSize: Cannot set negative depth buffer size %d", size);
+        return;
+    }
+    d->depthSize = size;
+    setDepth(size > 0);
+}
+
+/*!
+    Returns the depth buffer size.
+
+    \sa depth(), setDepth(), setDepthBufferSize()
+*/
+int QPlatformWindowFormat::depthBufferSize() const
+{
+   return d->depthSize;
+}
+
+/*!
+    \since 4.2
+
+    Set the preferred red buffer size to \a size.
+
+    \sa setGreenBufferSize(), setBlueBufferSize(), setAlphaBufferSize()
+*/
+void QPlatformWindowFormat::setRedBufferSize(int size)
+{
+    detach();
+    if (size < 0) {
+        qWarning("QGLFormat::setRedBufferSize: Cannot set negative red buffer size %d", size);
+        return;
+    }
+    d->redSize = size;
+}
+
+/*!
+    \since 4.2
+
+    Returns the red buffer size.
+
+    \sa setRedBufferSize()
+*/
+int QPlatformWindowFormat::redBufferSize() const
+{
+   return d->redSize;
+}
+
+/*!
+    \since 4.2
+
+    Set the preferred green buffer size to \a size.
+
+    \sa setRedBufferSize(), setBlueBufferSize(), setAlphaBufferSize()
+*/
+void QPlatformWindowFormat::setGreenBufferSize(int size)
+{
+    detach();
+    if (size < 0) {
+        qWarning("QGLFormat::setGreenBufferSize: Cannot set negative green buffer size %d", size);
+        return;
+    }
+    d->greenSize = size;
+}
+
+/*!
+    \since 4.2
+
+    Returns the green buffer size.
+
+    \sa setGreenBufferSize()
+*/
+int QPlatformWindowFormat::greenBufferSize() const
+{
+   return d->greenSize;
+}
+
+/*!
+    \since 4.2
+
+    Set the preferred blue buffer size to \a size.
+
+    \sa setRedBufferSize(), setGreenBufferSize(), setAlphaBufferSize()
+*/
+void QPlatformWindowFormat::setBlueBufferSize(int size)
+{
+    detach();
+    if (size < 0) {
+        qWarning("QGLFormat::setBlueBufferSize: Cannot set negative blue buffer size %d", size);
+        return;
+    }
+    d->blueSize = size;
+}
+
+/*!
+    \since 4.2
+
+    Returns the blue buffer size.
+
+    \sa setBlueBufferSize()
+*/
+int QPlatformWindowFormat::blueBufferSize() const
+{
+   return d->blueSize;
+}
+
+/*!
+    Set the preferred alpha buffer size to \a size.
+    This function implicitly enables the alpha channel.
+
+    \sa setRedBufferSize(), setGreenBufferSize(), alphaBufferSize()
+*/
+void QPlatformWindowFormat::setAlphaBufferSize(int size)
+{
+    detach();
+    if (size < 0) {
+        qWarning("QGLFormat::setAlphaBufferSize: Cannot set negative alpha buffer size %d", size);
+        return;
+    }
+    d->alphaSize = size;
+    setAlpha(size > 0);
+}
+
+/*!
+    Returns the alpha buffer size.
+
+    \sa alpha(), setAlpha(), setAlphaBufferSize()
+*/
+int QPlatformWindowFormat::alphaBufferSize() const
+{
+   return d->alphaSize;
+}
+
+/*!
+    Set the preferred accumulation buffer size, where \a size is the
+    bit depth for each RGBA component.
+
+    \sa accum(), setAccum(), accumBufferSize()
+*/
+void QPlatformWindowFormat::setAccumBufferSize(int size)
+{
+    detach();
+    if (size < 0) {
+        qWarning("QGLFormat::setAccumBufferSize: Cannot set negative accumulate buffer size %d", size);
+        return;
+    }
+    d->accumSize = size;
+    setAccum(size > 0);
+}
+
+/*!
+    Returns the accumulation buffer size.
+
+    \sa setAccumBufferSize(), accum(), setAccum()
+*/
+int QPlatformWindowFormat::accumBufferSize() const
+{
+   return d->accumSize;
+}
+
+/*!
+    Set the preferred stencil buffer size to \a size.
+
+    \sa stencilBufferSize(), setStencil(), stencil()
+*/
+void QPlatformWindowFormat::setStencilBufferSize(int size)
+{
+    detach();
+    if (size < 0) {
+        qWarning("QGLFormat::setStencilBufferSize: Cannot set negative stencil buffer size %d", size);
+        return;
+    }
+    d->stencilSize = size;
+    setStencil(size > 0);
+}
+
+/*!
+    Returns the stencil buffer size.
+
+    \sa stencil(), setStencil(), setStencilBufferSize()
+*/
+int QPlatformWindowFormat::stencilBufferSize() const
+{
+   return d->stencilSize;
+}
+
+/*!
+    \since 4.7
+
+    Set the OpenGL version to the \a major and \a minor numbers. If a
+    context compatible with the requested OpenGL version cannot be
+    created, a context compatible with version 1.x is created instead.
+
+    \sa majorVersion(), minorVersion()
+*/
+void QPlatformWindowFormat::setVersion(int major, int minor)
+{
+    if (major < 1 || minor < 0) {
+        qWarning("QGLFormat::setVersion: Cannot set zero or negative version number %d.%d", major, minor);
+        return;
+    }
+    detach();
+    d->majorVersion = major;
+    d->minorVersion = minor;
+}
+
+/*!
+    \since 4.7
+
+    Returns the OpenGL major version.
+
+    \sa setVersion(), minorVersion()
+*/
+int QPlatformWindowFormat::majorVersion() const
+{
+    return d->majorVersion;
+}
+
+/*!
+    \since 4.7
+
+    Returns the OpenGL minor version.
+
+    \sa setVersion(), majorVersion()
+*/
+int QPlatformWindowFormat::minorVersion() const
+{
+    return d->minorVersion;
+}
+
+/*!
+    \enum QGLFormat::OpenGLContextProfile
+    \since 4.7
+
+    This enum describes the OpenGL context profiles that can be
+    specified for contexts implementing OpenGL version 3.2 or
+    higher. These profiles are different from OpenGL ES profiles.
+
+    \value NoProfile            OpenGL version is lower than 3.2.
+    \value CoreProfile          Functionality deprecated in OpenGL version 3.0 is not available.
+    \value CompatibilityProfile Functionality from earlier OpenGL versions is available.
+*/
+
+/*!
+    \since 4.7
+
+    Set the OpenGL context profile to \a profile. The \a profile is
+    ignored if the requested OpenGL version is less than 3.2.
+
+    \sa profile()
+*/
+void QPlatformWindowFormat::setProfile(OpenGLContextProfile profile)
+{
+    detach();
+    d->profile = profile;
+}
+
+/*!
+    \since 4.7
+
+    Returns the OpenGL context profile.
+
+    \sa setProfile()
+*/
+QPlatformWindowFormat::OpenGLContextProfile QPlatformWindowFormat::profile() const
+{
+    return d->profile;
+}
+
+
+/*!
+    \fn bool QGLFormat::hasOpenGL()
+
+    Returns true if the window system has any OpenGL support;
+    otherwise returns false.
+
+    \warning This function must not be called until the QApplication
+    object has been created.
+*/
+
+
+
+/*!
+    \fn bool QGLFormat::hasOpenGLOverlays()
+
+    Returns true if the window system supports OpenGL overlays;
+    otherwise returns false.
+
+    \warning This function must not be called until the QApplication
+    object has been created.
+*/
+
+QPlatformWindowFormat::OpenGLVersionFlags Q_AUTOTEST_EXPORT qOpenGLVersionFlagsFromString(const QString &versionString)
+{
+    QPlatformWindowFormat::OpenGLVersionFlags versionFlags = QPlatformWindowFormat::OpenGL_Version_None;
+
+    if (versionString.startsWith(QLatin1String("OpenGL ES"))) {
+        QStringList parts = versionString.split(QLatin1Char(' '));
+        if (parts.size() >= 3) {
+            if (parts[2].startsWith(QLatin1String("1."))) {
+                if (parts[1].endsWith(QLatin1String("-CM"))) {
+                    versionFlags |= QPlatformWindowFormat::OpenGL_ES_Common_Version_1_0 |
+                                    QPlatformWindowFormat::OpenGL_ES_CommonLite_Version_1_0;
+                    if (parts[2].startsWith(QLatin1String("1.1")))
+                        versionFlags |= QPlatformWindowFormat::OpenGL_ES_Common_Version_1_1 |
+                                        QPlatformWindowFormat::OpenGL_ES_CommonLite_Version_1_1;
+                } else {
+                    // Not -CM, must be CL, CommonLite
+                    versionFlags |= QPlatformWindowFormat::OpenGL_ES_CommonLite_Version_1_0;
+                    if (parts[2].startsWith(QLatin1String("1.1")))
+                        versionFlags |= QPlatformWindowFormat::OpenGL_ES_CommonLite_Version_1_1;
+                }
+            } else {
+                // OpenGL ES version 2.0 or higher
+                versionFlags |= QPlatformWindowFormat::OpenGL_ES_Version_2_0;
+            }
+        } else {
+            // if < 3 parts to the name, it is an unrecognised OpenGL ES
+            qWarning("Unrecognised OpenGL ES version");
+        }
+    } else {
+        // not ES, regular OpenGL, the version numbers are first in the string
+        if (versionString.startsWith(QLatin1String("1."))) {
+            switch (versionString[2].toAscii()) {
+            case '5':
+                versionFlags |= QPlatformWindowFormat::OpenGL_Version_1_5;
+            case '4':
+                versionFlags |= QPlatformWindowFormat::OpenGL_Version_1_4;
+            case '3':
+                versionFlags |= QPlatformWindowFormat::OpenGL_Version_1_3;
+            case '2':
+                versionFlags |= QPlatformWindowFormat::OpenGL_Version_1_2;
+            case '1':
+                versionFlags |= QPlatformWindowFormat::OpenGL_Version_1_1;
+            default:
+                break;
+            }
+        } else if (versionString.startsWith(QLatin1String("2."))) {
+            versionFlags |= QPlatformWindowFormat::OpenGL_Version_1_1 |
+                            QPlatformWindowFormat::OpenGL_Version_1_2 |
+                            QPlatformWindowFormat::OpenGL_Version_1_3 |
+                            QPlatformWindowFormat::OpenGL_Version_1_4 |
+                            QPlatformWindowFormat::OpenGL_Version_1_5 |
+                            QPlatformWindowFormat::OpenGL_Version_2_0;
+            if (versionString[2].toAscii() == '1')
+                versionFlags |= QPlatformWindowFormat::OpenGL_Version_2_1;
+        } else if (versionString.startsWith(QLatin1String("3."))) {
+            versionFlags |= QPlatformWindowFormat::OpenGL_Version_1_1 |
+                            QPlatformWindowFormat::OpenGL_Version_1_2 |
+                            QPlatformWindowFormat::OpenGL_Version_1_3 |
+                            QPlatformWindowFormat::OpenGL_Version_1_4 |
+                            QPlatformWindowFormat::OpenGL_Version_1_5 |
+                            QPlatformWindowFormat::OpenGL_Version_2_0 |
+                            QPlatformWindowFormat::OpenGL_Version_2_1 |
+                            QPlatformWindowFormat::OpenGL_Version_3_0;
+            switch (versionString[2].toAscii()) {
+            case '3':
+                versionFlags |= QPlatformWindowFormat::OpenGL_Version_3_3;
+            case '2':
+                versionFlags |= QPlatformWindowFormat::OpenGL_Version_3_2;
+            case '1':
+                versionFlags |= QPlatformWindowFormat::OpenGL_Version_3_1;
+            case '0':
+                break;
+            default:
+                versionFlags |= QPlatformWindowFormat::OpenGL_Version_3_1 |
+                                QPlatformWindowFormat::OpenGL_Version_3_2 |
+                                QPlatformWindowFormat::OpenGL_Version_3_3;
+                break;
+            }
+        } else if (versionString.startsWith(QLatin1String("4."))) {
+            versionFlags |= QPlatformWindowFormat::OpenGL_Version_1_1 |
+                            QPlatformWindowFormat::OpenGL_Version_1_2 |
+                            QPlatformWindowFormat::OpenGL_Version_1_3 |
+                            QPlatformWindowFormat::OpenGL_Version_1_4 |
+                            QPlatformWindowFormat::OpenGL_Version_1_5 |
+                            QPlatformWindowFormat::OpenGL_Version_2_0 |
+                            QPlatformWindowFormat::OpenGL_Version_2_1 |
+                            QPlatformWindowFormat::OpenGL_Version_3_0 |
+                            QPlatformWindowFormat::OpenGL_Version_3_1 |
+                            QPlatformWindowFormat::OpenGL_Version_3_2 |
+                            QPlatformWindowFormat::OpenGL_Version_3_3 |
+                            QPlatformWindowFormat::OpenGL_Version_4_0;
+        } else {
+            versionFlags |= QPlatformWindowFormat::OpenGL_Version_1_1 |
+                            QPlatformWindowFormat::OpenGL_Version_1_2 |
+                            QPlatformWindowFormat::OpenGL_Version_1_3 |
+                            QPlatformWindowFormat::OpenGL_Version_1_4 |
+                            QPlatformWindowFormat::OpenGL_Version_1_5 |
+                            QPlatformWindowFormat::OpenGL_Version_2_0 |
+                            QPlatformWindowFormat::OpenGL_Version_2_1 |
+                            QPlatformWindowFormat::OpenGL_Version_3_0 |
+                            QPlatformWindowFormat::OpenGL_Version_3_1 |
+                            QPlatformWindowFormat::OpenGL_Version_3_2 |
+                            QPlatformWindowFormat::OpenGL_Version_3_3 |
+                            QPlatformWindowFormat::OpenGL_Version_4_0;
+        }
+    }
+    return versionFlags;
+}
+
+/*!
+    \enum QGLFormat::OpenGLVersionFlag
+    \since 4.2
+
+    This enum describes the various OpenGL versions that are
+    recognized by Qt. Use the QGLFormat::openGLVersionFlags() function
+    to identify which versions that are supported at runtime.
+
+    \value OpenGL_Version_None  If no OpenGL is present or if no OpenGL context is current.
+
+    \value OpenGL_Version_1_1  OpenGL version 1.1 or higher is present.
+
+    \value OpenGL_Version_1_2  OpenGL version 1.2 or higher is present.
+
+    \value OpenGL_Version_1_3  OpenGL version 1.3 or higher is present.
+
+    \value OpenGL_Version_1_4  OpenGL version 1.4 or higher is present.
+
+    \value OpenGL_Version_1_5  OpenGL version 1.5 or higher is present.
+
+    \value OpenGL_Version_2_0  OpenGL version 2.0 or higher is present.
+    Note that version 2.0 supports all the functionality of version 1.5.
+
+    \value OpenGL_Version_2_1  OpenGL version 2.1 or higher is present.
+
+    \value OpenGL_Version_3_0  OpenGL version 3.0 or higher is present.
+
+    \value OpenGL_Version_3_1  OpenGL version 3.1 or higher is present.
+    Note that OpenGL version 3.1 or higher does not necessarily support all the features of
+    version 3.0 and lower.
+
+    \value OpenGL_Version_3_2  OpenGL version 3.2 or higher is present.
+
+    \value OpenGL_ES_CommonLite_Version_1_0  OpenGL ES version 1.0 Common Lite or higher is present.
+
+    \value OpenGL_ES_Common_Version_1_0  OpenGL ES version 1.0 Common or higher is present.
+    The Common profile supports all the features of Common Lite.
+
+    \value OpenGL_ES_CommonLite_Version_1_1  OpenGL ES version 1.1 Common Lite or higher is present.
+
+    \value OpenGL_ES_Common_Version_1_1  OpenGL ES version 1.1 Common or higher is present.
+    The Common profile supports all the features of Common Lite.
+
+    \value OpenGL_ES_Version_2_0  OpenGL ES version 2.0 or higher is present.
+    Note that OpenGL ES version 2.0 does not support all the features of OpenGL ES 1.x.
+    So if OpenGL_ES_Version_2_0 is returned, none of the ES 1.x flags are returned.
+
+    See also \l{http://www.opengl.org} for more information about the different
+    revisions of OpenGL.
+
+    \sa openGLVersionFlags()
+*/
+
+/*!
+    \since 4.2
+
+    Identifies, at runtime, which OpenGL versions that are supported
+    by the current platform.
+
+    Note that if OpenGL version 1.5 is supported, its predecessors
+    (i.e., version 1.4 and lower) are also supported. To identify the
+    support of a particular feature, like multi texturing, test for
+    the version in which the feature was first introduced (i.e.,
+    version 1.3 in the case of multi texturing) to adapt to the largest
+    possible group of runtime platforms.
+
+    This function needs a valid current OpenGL context to work;
+    otherwise it will return OpenGL_Version_None.
+
+    \sa hasOpenGL(), hasOpenGLOverlays()
+*/
+QPlatformWindowFormat::OpenGLVersionFlags QPlatformWindowFormat::openGLVersionFlags()
+{
+//    static bool cachedDefault = false;
+    static OpenGLVersionFlags defaultVersionFlags = OpenGL_Version_None;
+//    QGLContext *currentCtx = const_cast<QGLContext *>(QGLContext::currentContext());
+//    QGLTemporaryContext *tmpContext = 0;
+
+//    if (currentCtx && currentCtx->d_func()->version_flags_cached)
+//        return currentCtx->d_func()->version_flags;
+
+//    if (!currentCtx) {
+//        if (cachedDefault) {
+//            return defaultVersionFlags;
+//        } else {
+//            if (!hasOpenGL())
+//                return defaultVersionFlags;
+//            tmpContext = new QGLTemporaryContext;
+//            cachedDefault = true;
+//        }
+//    }
+
+//    QString versionString(QLatin1String(reinterpret_cast<const char*>(glGetString(GL_VERSION))));
+//    OpenGLVersionFlags versionFlags = qOpenGLVersionFlagsFromString(versionString);
+//    if (currentCtx) {
+//        currentCtx->d_func()->version_flags_cached = true;
+//        currentCtx->d_func()->version_flags = versionFlags;
+//    }
+//    if (tmpContext) {
+//        defaultVersionFlags = versionFlags;
+//        delete tmpContext;
+//    }
+
+//    return versionFlags;
+    return defaultVersionFlags;
+}
+
+
+/*!
+    Returns the default QGLFormat for the application. All QGLWidget
+    objects that are created use this format unless another format is
+    specified, e.g. when they are constructed.
+
+    If no special default format has been set using
+    setDefaultFormat(), the default format is the same as that created
+    with QGLFormat().
+
+    \sa setDefaultFormat()
+*/
+
+QPlatformWindowFormat QPlatformWindowFormat::defaultFormat()
+{
+    return *q_platformwindow_default_format();
+}
+
+/*!
+    Sets a new default QGLFormat for the application to \a f. For
+    example, to set single buffering as the default instead of double
+    buffering, your main() might contain code like this:
+    \snippet doc/src/snippets/code/src_opengl_qgl.cpp 4
+
+    \sa defaultFormat()
+*/
+
+void QPlatformWindowFormat::setDefaultFormat(const QPlatformWindowFormat &f)
+{
+    *q_platformwindow_default_format() = f;
+}
+
+
+/*!
+    Returns the default QGLFormat for overlay contexts.
+
+    The default overlay format is:
+    \list
+    \i \link setDoubleBuffer() Double buffer:\endlink Disabled.
+    \i \link setDepth() Depth buffer:\endlink Disabled.
+    \i \link setRgba() RGBA:\endlink Disabled (i.e., color index enabled).
+    \i \link setAlpha() Alpha channel:\endlink Disabled.
+    \i \link setAccum() Accumulator buffer:\endlink Disabled.
+    \i \link setStencil() Stencil buffer:\endlink Disabled.
+    \i \link setStereo() Stereo:\endlink Disabled.
+    \i \link setDirectRendering() Direct rendering:\endlink Enabled.
+    \i \link setOverlay() Overlay:\endlink Disabled.
+    \i \link setSampleBuffers() Multisample buffers:\endlink Disabled.
+    \i \link setPlane() Plane:\endlink 1 (i.e., first overlay plane).
+    \endlist
+
+    \sa setDefaultFormat()
+*/
+
+//QPlatformWindowFormat QPlatformWindowFormat::defaultOverlayFormat()
+//{
+//    return *defaultOverlayFormatInstance();
+//}
+
+///*!
+//    Sets a new default QGLFormat for overlay contexts to \a f. This
+//    format is used whenever a QGLWidget is created with a format that
+//    hasOverlay() enabled.
+
+//    For example, to get a double buffered overlay context (if
+//    available), use code like this:
+
+//    \snippet doc/src/snippets/code/src_opengl_qgl.cpp 5
+
+//    As usual, you can find out after widget creation whether the
+//    underlying OpenGL system was able to provide the requested
+//    specification:
+
+//    \snippet doc/src/snippets/code/src_opengl_qgl.cpp 6
+
+//    \sa defaultOverlayFormat()
+//*/
+
+//void QPlatformWindowFormat::setDefaultOverlayFormat(const QPlatformWindowFormat &f)
+//{
+//    QPlatformWindowFormat *defaultFormat = defaultOverlayFormatInstance();
+//    *defaultFormat = f;
+//    // Make sure the user doesn't request that the overlays themselves
+//    // have overlays, since it is unlikely that the system supports
+//    // infinitely many planes...
+//    defaultFormat->setOverlay(false);
+//}
+
+
+/*!
+    Returns true if all the options of the two QGLFormat objects
+    \a a and \a b are equal; otherwise returns false.
+
+    \relates QGLFormat
+*/
+
+bool operator==(const QPlatformWindowFormat& a, const QPlatformWindowFormat& b)
+{
+    return (a.d == b.d) || ((int) a.d->opts == (int) b.d->opts
+        && a.d->alphaSize == b.d->alphaSize
+        && a.d->accumSize == b.d->accumSize
+        && a.d->stencilSize == b.d->stencilSize
+        && a.d->depthSize == b.d->depthSize
+        && a.d->redSize == b.d->redSize
+        && a.d->greenSize == b.d->greenSize
+        && a.d->blueSize == b.d->blueSize
+        && a.d->numSamples == b.d->numSamples
+        && a.d->swapInterval == b.d->swapInterval
+        && a.d->majorVersion == b.d->majorVersion
+        && a.d->minorVersion == b.d->minorVersion
+        && a.d->profile == b.d->profile);
+}
+
+
+/*!
+    Returns false if all the options of the two QGLFormat objects
+    \a a and \a b are equal; otherwise returns true.
+
+    \relates QGLFormat
+*/
+
+bool operator!=(const QPlatformWindowFormat& a, const QPlatformWindowFormat& b)
+{
+    return !(a == b);
+}