QGLFormat Class Reference

The QGLFormat class specifies the display format of an OpenGL rendering context. More...

#include <qgl.h>

Inheritance diagram for QGLFormat:

Public Types
enum	OpenGLContextProfile { NoProfile, CoreProfile, CompatibilityProfile }
	This enum describes the OpenGL context profiles that can be specified for contexts implementing OpenGL version 3. More...
enum	OpenGLVersionFlag {   OpenGL_Version_None = 0x00000000, OpenGL_Version_1_1 = 0x00000001, OpenGL_Version_1_2 = 0x00000002, OpenGL_Version_1_3 = 0x00000004,   OpenGL_Version_1_4 = 0x00000008, OpenGL_Version_1_5 = 0x00000010, OpenGL_Version_2_0 = 0x00000020, OpenGL_Version_2_1 = 0x00000040,   OpenGL_ES_Common_Version_1_0 = 0x00000080, OpenGL_ES_CommonLite_Version_1_0 = 0x00000100, OpenGL_ES_Common_Version_1_1 = 0x00000200, OpenGL_ES_CommonLite_Version_1_1 = 0x00000400,   OpenGL_ES_Version_2_0 = 0x00000800, OpenGL_Version_3_0 = 0x00001000, OpenGL_Version_3_1 = 0x00002000, OpenGL_Version_3_2 = 0x00004000,   OpenGL_Version_3_3 = 0x00008000, OpenGL_Version_4_0 = 0x00010000 }
	This enum describes the various OpenGL versions that are recognized by Qt. More...

Public Functions
bool	accum () const
	Returns true if the accumulation buffer is enabled; otherwise returns false. More...
int	accumBufferSize () const
	Returns the accumulation buffer size. More...
bool	alpha () const
	Returns true if the alpha buffer in the framebuffer is enabled; otherwise returns false. More...
int	alphaBufferSize () const
	Returns the alpha buffer size. More...
int	blueBufferSize () const
	Returns the blue buffer size. More...
bool	depth () const
	Returns true if the depth buffer is enabled; otherwise returns false. More...
int	depthBufferSize () const
	Returns the depth buffer size. More...
bool	directRendering () const
	Returns true if direct rendering is enabled; otherwise returns false. More...
bool	doubleBuffer () const
	Returns true if double buffering is enabled; otherwise returns false. More...
int	greenBufferSize () const
	Returns the green buffer size. More...
bool	hasOverlay () const
	Returns true if overlay plane is enabled; otherwise returns false. More...
int	majorVersion () const
	Returns the OpenGL major version. More...
int	minorVersion () const
	Returns the OpenGL minor version. More...
QGLFormat &	operator= (const QGLFormat &other)
	Assigns other to this object. More...
int	plane () const
	Returns the plane of this format. More...
OpenGLContextProfile	profile () const
	Returns the OpenGL context profile. More...
	QGLFormat ()
	Constructs a QGLFormat object with the following default settings: More...
	QGLFormat (QGL::FormatOptions options, int plane=0)
	Creates a QGLFormat object that is a copy of the current defaultFormat(). More...
	QGLFormat (const QGLFormat &other)
	Constructs a copy of other. More...
int	redBufferSize () const
	Returns the red buffer size. More...
bool	rgba () const
	Returns true if RGBA color mode is set. More...
bool	sampleBuffers () const
	Returns true if multisample buffer support is enabled; otherwise returns false. More...
int	samples () const
	Returns the number of samples per pixel when multisampling is enabled. More...
void	setAccum (bool enable)
	If enable is true enables the accumulation buffer; otherwise disables the accumulation buffer. More...
void	setAccumBufferSize (int size)
	Set the preferred accumulation buffer size, where size is the bit depth for each RGBA component. More...
void	setAlpha (bool enable)
	If enable is true enables the alpha buffer; otherwise disables the alpha buffer. More...
void	setAlphaBufferSize (int size)
	Set the preferred alpha buffer size to size. More...
void	setBlueBufferSize (int size)
	Set the preferred blue buffer size to size. More...
void	setDepth (bool enable)
	If enable is true enables the depth buffer; otherwise disables the depth buffer. More...
void	setDepthBufferSize (int size)
	Set the minimum depth buffer size to size. More...
void	setDirectRendering (bool enable)
	If enable is true enables direct rendering; otherwise disables direct rendering. More...
void	setDoubleBuffer (bool enable)
	If enable is true sets double buffering; otherwise sets single buffering. More...
void	setGreenBufferSize (int size)
	Set the preferred green buffer size to size. More...
void	setOption (QGL::FormatOptions opt)
	Sets the format option to opt. More...
void	setOverlay (bool enable)
	If enable is true enables an overlay plane; otherwise disables the overlay plane. More...
void	setPlane (int plane)
	Sets the requested plane to plane. More...
void	setProfile (OpenGLContextProfile profile)
	Set the OpenGL context profile to profile. More...
void	setRedBufferSize (int size)
	Set the preferred red buffer size to size. More...
void	setRgba (bool enable)
	If enable is true sets RGBA mode. More...
void	setSampleBuffers (bool enable)
	If enable is true, a GL context with multisample buffer support is picked; otherwise ignored. More...
void	setSamples (int numSamples)
	Set the preferred number of samples per pixel when multisampling is enabled to numSamples. More...
void	setStencil (bool enable)
	If enable is true enables the stencil buffer; otherwise disables the stencil buffer. More...
void	setStencilBufferSize (int size)
	Set the preferred stencil buffer size to size. More...
void	setStereo (bool enable)
	If enable is true enables stereo buffering; otherwise disables stereo buffering. More...
void	setSwapInterval (int interval)
	Set the preferred swap interval. More...
void	setVersion (int major, int minor)
	Set the OpenGL version to the major and minor numbers. More...
bool	stencil () const
	Returns true if the stencil buffer is enabled; otherwise returns false. More...
int	stencilBufferSize () const
	Returns the stencil buffer size. More...
bool	stereo () const
	Returns true if stereo buffering is enabled; otherwise returns false. More...
int	swapInterval () const
	Returns the currently set swap interval. More...
bool	testOption (QGL::FormatOptions opt) const
	Returns true if format option opt is set; otherwise returns false. More...
	~QGLFormat ()
	Destroys the QGLFormat. More...

Static Public Functions
static QGLFormat	defaultFormat ()
static QGLFormat	defaultOverlayFormat ()
	Returns the default QGLFormat for overlay contexts. More...
static bool	hasOpenGL ()
	Returns true if the window system has any OpenGL support; otherwise returns false. More...
static bool	hasOpenGLOverlays ()
	Returns true if the window system supports OpenGL overlays; otherwise returns false. More...
static OpenGLVersionFlags	openGLVersionFlags ()
static void	setDefaultFormat (const QGLFormat &f)
	Sets a new default QGLFormat for the application to f. More...
static void	setDefaultOverlayFormat (const QGLFormat &f)
	Sets a new default QGLFormat for overlay contexts to f. More...

Private Functions
void	detach ()

Properties
QGLFormatPrivate *	d

Friends
Q_OPENGL_EXPORT bool	operator!= (const QGLFormat &, const QGLFormat &)
	Returns false if all the options of the two QGLFormat objects a and b are equal; otherwise returns true. More...
Q_OPENGL_EXPORT QDebug	operator<< (QDebug, const QGLFormat &)
Q_OPENGL_EXPORT bool	operator== (const QGLFormat &, const QGLFormat &)
	Returns true if all the options of the two QGLFormat objects a and b are equal; otherwise returns false. More...

Detailed Description

The QGLFormat class specifies the display format of an OpenGL rendering context.

A display format has several characteristics:

• Double or single buffering.
• Depth buffer.
• RGBA or color index mode.
• Alpha channel.
• Accumulation buffer.
• Stencil buffer.
• Stereo buffers.
• Direct rendering.
• Presence of an overlay.
• Plane of an overlay.
• Multisample buffers.

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:

QGLFormat fmt;
fmt.setAlpha(true);
fmt.setStereo(true);
QGLFormat::setDefaultFormat(fmt);

Or you can specify the desired format when creating an object of your QGLWidget subclass:

QGLFormat fmt;
fmt.setDoubleBuffer(false);                 // single buffer
fmt.setDirectRendering(false);              // software rendering
MyGLWidget* myWidget = new MyGLWidget(fmt, ...);

After the widget has been created, you can find out which of the requested features the system was able to provide:

QGLFormat fmt;
fmt.setOverlay(true);
fmt.setStereo(true);
MyGLWidget* myWidget = new MyGLWidget(fmt, ...);
if (!myWidget->format().stereo()) {
    // ok, goggles off
    if (!myWidget->format().hasOverlay()) {
        qFatal("Cool hardware required");
    }
}

OpenGL is a trademark of Silicon Graphics, Inc. in the United States and other countries.

See also

QGLContext, QGLWidget

Definition at line 175 of file qgl.h.

Enumerations

OpenGLContextProfile

enum QGLFormat::OpenGLContextProfile

This enum describes the OpenGL context profiles that can be specified for contexts implementing OpenGL version 3.

Since

4.7

2 or higher. These profiles are different from OpenGL ES profiles.

• NoProfile OpenGL version is lower than 3.2.
• CoreProfile Functionality deprecated in OpenGL version 3.0 is not available.
• CompatibilityProfile Functionality from earlier OpenGL versions is available.

Enumerator
NoProfile
CoreProfile
CompatibilityProfile

Definition at line 252 of file qgl.h.

                              {
        NoProfile,
        CoreProfile,
        CompatibilityProfile
    };

OpenGLVersionFlag

enum QGLFormat::OpenGLVersionFlag

This enum describes the various OpenGL versions that are recognized by Qt.

Since

4.2

Use the QGLFormat::openGLVersionFlags() function to identify which versions that are supported at runtime.

• OpenGL_Version_None If no OpenGL is present or if no OpenGL context is current.

• OpenGL_Version_1_1 OpenGL version 1.1 or higher is present.

• OpenGL_Version_1_2 OpenGL version 1.2 or higher is present.

• OpenGL_Version_1_3 OpenGL version 1.3 or higher is present.

• OpenGL_Version_1_4 OpenGL version 1.4 or higher is present.

• OpenGL_Version_1_5 OpenGL version 1.5 or higher is present.

• 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.

• OpenGL_Version_2_1 OpenGL version 2.1 or higher is present.

• OpenGL_Version_3_0 OpenGL version 3.0 or higher is present.

• 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.

• OpenGL_Version_3_2 OpenGL version 3.2 or higher is present.

• OpenGL_Version_3_3 OpenGL version 3.3 or higher is present.

• OpenGL_Version_4_0 OpenGL version 4.0 or higher is present.

• OpenGL_ES_CommonLite_Version_1_0 OpenGL ES version 1.0 Common Lite or higher is present.

• 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.

• OpenGL_ES_CommonLite_Version_1_1 OpenGL ES version 1.1 Common Lite or higher is present.

• 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.

• 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 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; }

/*! 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().

See also

setDefaultFormat()

Enumerator
OpenGL_Version_None
OpenGL_Version_1_1
OpenGL_Version_1_2
OpenGL_Version_1_3
OpenGL_Version_1_4
OpenGL_Version_1_5
OpenGL_Version_2_0
OpenGL_Version_2_1
OpenGL_ES_Common_Version_1_0
OpenGL_ES_CommonLite_Version_1_0
OpenGL_ES_Common_Version_1_1
OpenGL_ES_CommonLite_Version_1_1
OpenGL_ES_Version_2_0
OpenGL_Version_3_0
OpenGL_Version_3_1
OpenGL_Version_3_2
OpenGL_Version_3_3
OpenGL_Version_4_0

Definition at line 261 of file qgl.h.

                           {
        OpenGL_Version_None               = 0x00000000,
        OpenGL_Version_1_1                = 0x00000001,
        OpenGL_Version_1_2                = 0x00000002,
        OpenGL_Version_1_3                = 0x00000004,
        OpenGL_Version_1_4                = 0x00000008,
        OpenGL_Version_1_5                = 0x00000010,
        OpenGL_Version_2_0                = 0x00000020,
        OpenGL_Version_2_1                = 0x00000040,
        OpenGL_ES_Common_Version_1_0      = 0x00000080,
        OpenGL_ES_CommonLite_Version_1_0  = 0x00000100,
        OpenGL_ES_Common_Version_1_1      = 0x00000200,
        OpenGL_ES_CommonLite_Version_1_1  = 0x00000400,
        OpenGL_ES_Version_2_0             = 0x00000800,
        OpenGL_Version_3_0                = 0x00001000,
        OpenGL_Version_3_1                = 0x00002000,
        OpenGL_Version_3_2                = 0x00004000,
        OpenGL_Version_3_3                = 0x00008000,
        OpenGL_Version_4_0                = 0x00010000
    };

Constructors and Destructors

QGLFormat() [1/3]

QGLFormat::QGLFormat

(

)

Constructs a QGLFormat object with the following default settings:

• Double buffer: Enabled.
• Depth buffer: Enabled.
• RGBA: Enabled (i.e., color index disabled).
• Alpha channel: Disabled.
• Accumulator buffer: Disabled.
• Stencil buffer: Enabled.
• Stereo: Disabled.
• Direct rendering: Enabled.
• Overlay: Disabled.
• Plane: 0 (i.e., normal plane).
• Multisample buffers: Disabled.

Definition at line 449 of file qgl.cpp.

{
    d = new QGLFormatPrivate;
}

QGLFormat() [2/3]

QGLFormat::QGLFormat	(	QGL::FormatOptions	options,
		int	plane = 0
	)

Creates a QGLFormat object that is a copy of the current defaultFormat().

If options is not 0, the default format is modified by the specified format options. The 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:

// The rendering in MyGLWidget depends on using
// stencil buffer and alpha channel
MyGLWidget::MyGLWidget(QWidget* parent)
    : QGLWidget(QGLFormat(QGL::StencilBuffer | QGL::AlphaChannel), parent)
{
    if (!format().stencil())
        qWarning("Could not get stencil buffer; results will be suboptimal");
    if (!format().alpha())
        qWarning("Could not get alpha channel; results will be suboptimal");
    ...
}

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 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.

See also

defaultFormat(), setOption(), setPlane()

Definition at line 478 of file qgl.cpp.

{
    d = new QGLFormatPrivate;
    QGL::FormatOptions newOpts = options;
    d->opts = defaultFormat().d->opts;
    d->opts |= (newOpts & 0xffff);
    d->opts &= ~(newOpts >> 16);
    d->pln = plane;
}

QGLFormat() [3/3]

QGLFormat::QGLFormat

(

const QGLFormat &

other

)

Constructs a copy of other.

Definition at line 505 of file qgl.cpp.

{
    d = other.d;
    d->ref.ref();
}

~QGLFormat()

QGLFormat::~QGLFormat

(

)

Destroys the QGLFormat.

Definition at line 529 of file qgl.cpp.

{
    if (!d->ref.deref())
        delete d;
}

Functions

accum()

bool QGLFormat::accum ( ) const

inline

Returns true if the accumulation buffer is enabled; otherwise returns false.

The accumulation buffer is disabled by default.

See also

setAccum(), setAccumBufferSize()

Definition at line 633 of file qgl.h.

Referenced by buildSpec(), QGLContext::choosePixelFormat(), QGLContext::chooseVisual(), nearest_gl_texture_size(), pfdToQGLFormat(), pfiToQGLFormat(), QGLGraphicsSystem::QGLGraphicsSystem(), qt_format_to_attrib_list(), and QGLContextPrivate::tryFormat().

{
    return testOption(QGL::AccumBuffer);
}

accumBufferSize()

int QGLFormat::accumBufferSize

(

)

const

Returns the accumulation buffer size.

See also

setAccumBufferSize(), accum(), setAccum()

Definition at line 1159 of file qgl.cpp.

Referenced by buildSpec(), nearest_gl_texture_size(), pfiToQGLFormat(), qt_format_to_attrib_list(), and QGLContextPrivate::tryFormat().

{
   return d->accumSize;
}

alpha()

bool QGLFormat::alpha ( ) const

inline

Returns true if the alpha buffer in the framebuffer is enabled; otherwise returns false.

The alpha buffer is disabled by default.

See also

setAlpha(), setAlphaBufferSize()

Definition at line 628 of file qgl.h.

Referenced by QGLWindowSurface::beginPaint(), buildSpec(), QGLContext::choosePixelFormat(), QGLContext::chooseVisual(), nearest_gl_texture_size(), pfdToQGLFormat(), pfiToQGLFormat(), QGLGraphicsSystem::QGLGraphicsSystem(), qt_eglproperties_set_glformat(), qt_format_to_attrib_list(), QGLContextPrivate::tryFormat(), and QGLContext::tryVisual().

{
    return testOption(QGL::AlphaChannel);
}

alphaBufferSize()

int QGLFormat::alphaBufferSize

(

)

const

Returns the alpha buffer size.

See also

alpha(), setAlpha(), setAlphaBufferSize()

Definition at line 1132 of file qgl.cpp.

Referenced by buildSpec(), QGLPaintDevice::metric(), nearest_gl_texture_size(), QGLOverlayWidget::paintGL(), pfiToQGLFormat(), qt_eglproperties_set_glformat(), qt_format_to_attrib_list(), and QGLContextPrivate::tryFormat().

{
   return d->alphaSize;
}

blueBufferSize()

int QGLFormat::blueBufferSize

(

)

const

Returns the blue buffer size.

Since

4.2

See also

setBlueBufferSize()

Definition at line 1105 of file qgl.cpp.

Referenced by buildSpec(), QGLPaintDevice::metric(), nearest_gl_texture_size(), pfiToQGLFormat(), qt_eglproperties_set_glformat(), qt_format_to_attrib_list(), and QGLContextPrivate::tryFormat().

{
   return d->blueSize;
}

defaultFormat()

QGLFormat QGLFormat::defaultFormat ( )

static

Definition at line 1518 of file qgl.cpp.

Referenced by QWSGLWindowSurface::context(), QX11GLPixmapData::glFormat(), QGLPixelBuffer::hasOpenGLPbuffers(), qt_format_to_attrib_list(), qt_resolve_stencil_face_extension(), and qt_resolve_version_1_3_functions().

{
    return *qgl_default_format();
}

defaultOverlayFormat()

QGLFormat QGLFormat::defaultOverlayFormat ( )

static

Returns the default QGLFormat for overlay contexts.

The default overlay format is:

• Double buffer: Disabled.
• Depth buffer: Disabled.
• RGBA: Disabled (i.e., color index enabled).
• Alpha channel: Disabled.
• Accumulator buffer: Disabled.
• Stencil buffer: Disabled.
• Stereo: Disabled.
• Direct rendering: Enabled.
• Overlay: Disabled.
• Multisample buffers: Disabled.
• Plane: 1 (i.e., first overlay plane).

See also

setDefaultFormat()

Definition at line 1559 of file qgl.cpp.

Referenced by QGLContext::choosePixelFormat(), QGLOverlayWidget::paintGL(), and qStoreColors().

{
    return *defaultOverlayFormatInstance();
}

depth()

bool QGLFormat::depth ( ) const

inline

Returns true if the depth buffer is enabled; otherwise returns false.

The depth buffer is enabled by default.

See also

setDepth(), setDepthBufferSize()

Definition at line 618 of file qgl.h.

Referenced by buildSpec(), QGLContext::choosePixelFormat(), QGLContext::chooseVisual(), nearest_gl_texture_size(), pfdToQGLFormat(), pfiToQGLFormat(), QGLGraphicsSystem::QGLGraphicsSystem(), qt_eglproperties_set_glformat(), qt_format_to_attrib_list(), and QGLContextPrivate::tryFormat().

{
    return testOption(QGL::DepthBuffer);
}

depthBufferSize()

int QGLFormat::depthBufferSize

(

)

const

Returns the depth buffer size.

See also

depth(), setDepth(), setDepthBufferSize()

Definition at line 1000 of file qgl.cpp.

Referenced by buildSpec(), nearest_gl_texture_size(), pfiToQGLFormat(), qt_eglproperties_set_glformat(), qt_format_to_attrib_list(), and QGLContextPrivate::tryFormat().

{
   return d->depthSize;
}

detach()

void QGLFormat::detach ( )

private

Warning

This function is not part of the public interface.

Definition at line 491 of file qgl.cpp.

{
    if (d->ref != 1) {
        QGLFormatPrivate *newd = new QGLFormatPrivate(d);
        if (!d->ref.deref())
            delete d;
        d = newd;
    }
}

directRendering()

bool QGLFormat::directRendering ( ) const

inline

Returns true if direct rendering is enabled; otherwise returns false.

Direct rendering is enabled by default.

See also

setDirectRendering()

Definition at line 648 of file qgl.h.

Referenced by QGLContext::choosePixelFormat(), and pfiToQGLFormat().

{
    return testOption(QGL::DirectRendering);
}

doubleBuffer()

bool QGLFormat::doubleBuffer ( ) const

inline

Returns true if double buffering is enabled; otherwise returns false.

Double buffering is enabled by default.

See also

setDoubleBuffer()

Definition at line 613 of file qgl.h.

Referenced by buildSpec(), QGLContext::choosePixelFormat(), QGLContext::chooseVisual(), QGLWindowSurface::flush(), pfiToQGLFormat(), qt_format_to_attrib_list(), and QGLContextPrivate::tryFormat().

{
    return testOption(QGL::DoubleBuffer);
}

greenBufferSize()

int QGLFormat::greenBufferSize

(

)

const

Returns the green buffer size.

Since

4.2

See also

setGreenBufferSize()

Definition at line 1070 of file qgl.cpp.

Referenced by buildSpec(), QGLPaintDevice::metric(), nearest_gl_texture_size(), pfiToQGLFormat(), qt_eglproperties_set_glformat(), qt_format_to_attrib_list(), and QGLContextPrivate::tryFormat().

{
   return d->greenSize;
}

hasOpenGL()

bool QGLFormat::hasOpenGL ( )

static

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.

Definition at line 186 of file qgl_egl.cpp.

Referenced by qglx_getProcAddress(), qwglError(), and QGLTemporaryContext::~QGLTemporaryContext().

{
    return true;
}

hasOpenGLOverlays()

bool QGLFormat::hasOpenGLOverlays ( )

static

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.

Definition at line 185 of file qgl_mac.mm.

Referenced by qDeleteQGLContext(), and qglx_getProcAddress().

{
    return false;
}

hasOverlay()

bool QGLFormat::hasOverlay ( ) const

inline

Returns true if overlay plane is enabled; otherwise returns false.

Overlay is disabled by default.

See also

setOverlay()

Definition at line 653 of file qgl.h.

Referenced by QGLContext::choosePixelFormat(), QGLOverlayWidget::paintGL(), and pfiToQGLFormat().

{
    return testOption(QGL::HasOverlay);
}

majorVersion()

int QGLFormat::majorVersion

(

)

const

Returns the OpenGL major version.

Since

4.7

See also

setVersion(), minorVersion()

Definition at line 1223 of file qgl.cpp.

Referenced by QGL2PaintEngineEx::beginNativePainting(), and qgl_create_context().

{
    return d->majorVersion;
}

minorVersion()

int QGLFormat::minorVersion

(

)

const

Returns the OpenGL minor version.

Since

4.7

See also

setVersion(), majorVersion()

Definition at line 1238 of file qgl.cpp.

Referenced by QGL2PaintEngineEx::beginNativePainting(), and qgl_create_context().

{
    return d->minorVersion;
}

openGLVersionFlags()

static OpenGLVersionFlags QGLFormat::openGLVersionFlags ( )

static

Referenced by QOpenGLPaintEngine::begin(), QGLEngineSelector::preferredPaintEngine(), and qt_gl_resolve_features().

operator=()

QGLFormat & QGLFormat::operator=

(

const QGLFormat &

other

)

Assigns other to this object.

Definition at line 515 of file qgl.cpp.

{
    if (d != other.d) {
        other.d->ref.ref();
        if (!d->ref.deref())
            delete d;
        d = other.d;
    }
    return *this;
}

plane()

int QGLFormat::plane

(

)

const

Returns the plane of this format.

The default for normal formats is 0, which means the normal plane. The default for overlay formats is 1, which is the first overlay plane.

See also

setPlane(), defaultOverlayFormat()

Definition at line 924 of file qgl.cpp.

Referenced by buildSpec(), nearest_gl_texture_size(), qgl_create_context(), and QGLContextPrivate::tryFormat().

{
    return d->pln;
}

profile()

QGLFormat::OpenGLContextProfile QGLFormat::profile

(

)

const

Returns the OpenGL context profile.

Since

4.7

See also

setProfile()

Definition at line 1286 of file qgl.cpp.

Referenced by QGL2PaintEngineEx::beginNativePainting(), and qgl_create_context().

{
    return d->profile;
}

redBufferSize()

int QGLFormat::redBufferSize

(

)

const

Returns the red buffer size.

Since

4.2

See also

setRedBufferSize()

Definition at line 1035 of file qgl.cpp.

Referenced by buildSpec(), QGLPaintDevice::metric(), nearest_gl_texture_size(), pfiToQGLFormat(), qt_eglproperties_set_glformat(), qt_format_to_attrib_list(), and QGLContextPrivate::tryFormat().

{
   return d->redSize;
}

rgba()

bool QGLFormat::rgba ( ) const

inline

Returns true if RGBA color mode is set.

Returns false if color index mode is set. The default color mode is RGBA.

See also

setRgba()

Definition at line 623 of file qgl.h.

Referenced by buildSpec(), QGLContext::chooseContext(), QGLContext::choosePixelFormat(), QGLContext::chooseVisual(), and pfiToQGLFormat().

{
    return testOption(QGL::Rgba);
}

sampleBuffers()

bool QGLFormat::sampleBuffers ( ) const

inline

Returns true if multisample buffer support is enabled; otherwise returns false.

The multisample buffer is disabled by default.

See also

setSampleBuffers()

Definition at line 658 of file qgl.h.

Referenced by buildSpec(), QGLContext::chooseVisual(), nearest_gl_texture_size(), pfiToQGLFormat(), QGLGraphicsSystem::QGLGraphicsSystem(), qt_eglproperties_set_glformat(), qt_format_to_attrib_list(), QGLContextPrivate::tryFormat(), and QGLWindowSurface::updateGeometry().

{
    return testOption(QGL::SampleBuffers);
}

samples()

int QGLFormat::samples

(

)

const

Returns the number of samples per pixel when multisampling is enabled.

By default, the highest number of samples that is available is used.

See also

setSampleBuffers(), sampleBuffers(), setSamples()

Definition at line 824 of file qgl.cpp.

Referenced by buildSpec(), nearest_gl_texture_size(), pfiToQGLFormat(), qt_eglproperties_set_glformat(), qt_format_to_attrib_list(), and QGLContextPrivate::tryFormat().

{
   return d->numSamples;
}

setAccum()

void QGLFormat::setAccum

(

bool

enable

)

If 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.

See also

accum(), setAccumBufferSize()

Definition at line 694 of file qgl.cpp.

Referenced by QGLContext::chooseVisual(), pfdToQGLFormat(), pfiToQGLFormat(), QGLGraphicsSystem::QGLGraphicsSystem(), and qt_format_to_attrib_list().

{
    setOption(enable ? QGL::AccumBuffer : QGL::NoAccumBuffer);
}

setAccumBufferSize()

void QGLFormat::setAccumBufferSize

(

int

size

)

Set the preferred accumulation buffer size, where size is the bit depth for each RGBA component.

See also

accum(), setAccum(), accumBufferSize()

Definition at line 1143 of file qgl.cpp.

Referenced by pfdToQGLFormat(), pfiToQGLFormat(), QGLGraphicsSystem::QGLGraphicsSystem(), and qt_glformat_from_eglconfig().

{
    detach();
    if (size < 0) {
        qWarning("QGLFormat::setAccumBufferSize: Cannot set negative accumulate buffer size %d", size);
        return;
    }
    d->accumSize = size;
    setAccum(size > 0);
}

setAlpha()

void QGLFormat::setAlpha

(

bool

enable

)

If 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.

See also

alpha(), setAlphaBufferSize()

Definition at line 664 of file qgl.cpp.

Referenced by QGLContext::chooseVisual(), QGLWindowSurface::hijackWindow(), pfdToQGLFormat(), pfiToQGLFormat(), QGLGraphicsSystem::QGLGraphicsSystem(), and QMeeGoGraphicsSystem::setTranslucent().

{
    setOption(enable ? QGL::AlphaChannel : QGL::NoAlphaChannel);
}

setAlphaBufferSize()

void QGLFormat::setAlphaBufferSize

(

int

size

)

Set the preferred alpha buffer size to size.

This function implicitly enables the alpha channel.

See also

setRedBufferSize(), setGreenBufferSize(), alphaBufferSize()

Definition at line 1116 of file qgl.cpp.

Referenced by QGLOverlayWidget::paintGL(), pfdToQGLFormat(), pfiToQGLFormat(), QGLGraphicsSystem::QGLGraphicsSystem(), and qt_glformat_from_eglconfig().

{
    detach();
    if (size < 0) {
        qWarning("QGLFormat::setAlphaBufferSize: Cannot set negative alpha buffer size %d", size);
        return;
    }
    d->alphaSize = size;
    setAlpha(size > 0);
}

setBlueBufferSize()

void QGLFormat::setBlueBufferSize

(

int

size

)

Set the preferred blue buffer size to size.

Since

4.2

See also

setRedBufferSize(), setGreenBufferSize(), setAlphaBufferSize()

Definition at line 1085 of file qgl.cpp.

Referenced by pfdToQGLFormat(), pfiToQGLFormat(), QGLGraphicsSystem::QGLGraphicsSystem(), and qt_glformat_from_eglconfig().

{
    detach();
    if (size < 0) {
        qWarning("QGLFormat::setBlueBufferSize: Cannot set negative blue buffer size %d", size);
        return;
    }
    d->blueSize = size;
}

setDefaultFormat()

void QGLFormat::setDefaultFormat ( const QGLFormat &  f )

static

Sets a new default QGLFormat for the application to f.

For example, to set single buffering as the default instead of double buffering, your main() might contain code like this:

QApplication a(argc, argv);
QGLFormat f;
f.setDoubleBuffer(false);
QGLFormat::setDefaultFormat(f);

See also

defaultFormat()

Definition at line 1532 of file qgl.cpp.

{
    *qgl_default_format() = f;
}

setDefaultOverlayFormat()

void QGLFormat::setDefaultOverlayFormat ( const QGLFormat &  f )

static

Sets a new default QGLFormat for overlay contexts to 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:

QGLFormat f = QGLFormat::defaultOverlayFormat();
f.setDoubleBuffer(true);
QGLFormat::setDefaultOverlayFormat(f);

As usual, you can find out after widget creation whether the underlying OpenGL system was able to provide the requested specification:

// ...continued from above
MyGLWidget* myWidget = new MyGLWidget(QGLFormat(QGL::HasOverlay), ...);
if (myWidget->format().hasOverlay()) {
    // Yes, we got an overlay, let's check _its_ format:
    QGLContext* olContext = myWidget->overlayContext();
    if (olContext->format().doubleBuffer())
        ; // yes, we got a double buffered overlay
    else
        ; // no, only single buffered overlays are available
}

See also

defaultOverlayFormat()

Definition at line 1583 of file qgl.cpp.

{
    QGLFormat *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);
}

setDepth()

void QGLFormat::setDepth

(

bool

enable

)

If 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.

See also

depth(), setDepthBufferSize()

Definition at line 599 of file qgl.cpp.

Referenced by QGLContext::chooseVisual(), pfdToQGLFormat(), pfiToQGLFormat(), QGLGraphicsSystem::QGLGraphicsSystem(), and QGLFBOGLPaintDevice::setFBO().

{
    setOption(enable ? QGL::DepthBuffer : QGL::NoDepthBuffer);
}

setDepthBufferSize()

void QGLFormat::setDepthBufferSize

(

int

size

)

Set the minimum depth buffer size to size.

See also

depthBufferSize(), setDepth(), depth()

Definition at line 984 of file qgl.cpp.

Referenced by pfdToQGLFormat(), pfiToQGLFormat(), QGLGraphicsSystem::QGLGraphicsSystem(), and qt_glformat_from_eglconfig().

{
    detach();
    if (size < 0) {
        qWarning("QGLFormat::setDepthBufferSize: Cannot set negative depth buffer size %d", size);
        return;
    }
    d->depthSize = size;
    setDepth(size > 0);
}

setDirectRendering()

void QGLFormat::setDirectRendering

(

bool

enable

)

If 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.

See also

directRendering()

Definition at line 787 of file qgl.cpp.

Referenced by pfdToQGLFormat(), pfiToQGLFormat(), and qt_glformat_from_eglconfig().

{
    setOption(enable ? QGL::DirectRendering : QGL::IndirectRendering);
}

setDoubleBuffer()

void QGLFormat::setDoubleBuffer

(

bool

enable

)

If 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.

Note that single buffered contexts are currently not supported with EGL.

See also

doubleBuffer(), QGLContext::swapBuffers(), QGLWidget::swapBuffers()

Definition at line 566 of file qgl.cpp.

Referenced by QGLContext::chooseVisual(), pfdToQGLFormat(), pfiToQGLFormat(), QGLGraphicsSystem::QGLGraphicsSystem(), and qt_glformat_from_eglconfig().

{
    setOption(enable ? QGL::DoubleBuffer : QGL::SingleBuffer);
}

setGreenBufferSize()

void QGLFormat::setGreenBufferSize

(

int

size

)

Set the preferred green buffer size to size.

Since

4.2

See also

setRedBufferSize(), setBlueBufferSize(), setAlphaBufferSize()

Definition at line 1050 of file qgl.cpp.

Referenced by pfdToQGLFormat(), pfiToQGLFormat(), QGLGraphicsSystem::QGLGraphicsSystem(), and qt_glformat_from_eglconfig().

{
    detach();
    if (size < 0) {
        qWarning("QGLFormat::setGreenBufferSize: Cannot set negative green buffer size %d", size);
        return;
    }
    d->greenSize = size;
}

setOption()

void QGLFormat::setOption

(

QGL::FormatOptions

opt

)

Sets the format option to opt.

See also

testOption()

Definition at line 954 of file qgl.cpp.

{
    detach();
    if (opt & 0xffff)
        d->opts |= opt;
    else
       d->opts &= ~(opt >> 16);
}

setOverlay()

void QGLFormat::setOverlay

(

bool

enable

)

If 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.

See also

hasOverlay()

Definition at line 912 of file qgl.cpp.

Referenced by pfdToQGLFormat(), and pfiToQGLFormat().

{
    setOption(enable ? QGL::HasOverlay : QGL::NoOverlay);
}

setPlane()

void QGLFormat::setPlane

(

int

plane

)

Sets the requested plane to plane.

0 is the normal plane, 1 is the first overlay plane, 2 is the second overlay plane, etc.; -1, -2, etc. are underlay planes.

Note that in contrast to other format specifications, the plane specifications will be matched exactly. This means that if you specify a plane that the underlying OpenGL system cannot provide, an invalid QGLWidget will be created.

See also

plane()

Definition at line 942 of file qgl.cpp.

Referenced by QGLGraphicsSystem::QGLGraphicsSystem(), and qt_glformat_from_eglconfig().

{
    detach();
    d->pln = plane;
}

setProfile()

void QGLFormat::setProfile

(

OpenGLContextProfile

profile

)

Set the OpenGL context profile to profile.

Since

4.7

The profile is ignored if the requested OpenGL version is less than 3.2.

See also

profile()

Definition at line 1270 of file qgl.cpp.

{
    detach();
    d->profile = profile;
}

setRedBufferSize()

void QGLFormat::setRedBufferSize

(

int

size

)

Set the preferred red buffer size to size.

Since

4.2

See also

setGreenBufferSize(), setBlueBufferSize(), setAlphaBufferSize()

Definition at line 1015 of file qgl.cpp.

Referenced by pfdToQGLFormat(), pfiToQGLFormat(), QGLGraphicsSystem::QGLGraphicsSystem(), and qt_glformat_from_eglconfig().

{
    detach();
    if (size < 0) {
        qWarning("QGLFormat::setRedBufferSize: Cannot set negative red buffer size %d", size);
        return;
    }
    d->redSize = size;
}

setRgba()

void QGLFormat::setRgba

(

bool

enable

)

If enable is true sets RGBA mode.

If 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.

See also

rgba()

Definition at line 633 of file qgl.cpp.

Referenced by pfdToQGLFormat(), pfiToQGLFormat(), QGLGraphicsSystem::QGLGraphicsSystem(), and qt_glformat_from_eglconfig().

{
    setOption(enable ? QGL::Rgba : QGL::ColorIndex);
}

setSampleBuffers()

void QGLFormat::setSampleBuffers

(

bool

enable

)

If enable is true, a GL context with multisample buffer support is picked; otherwise ignored.

See also

sampleBuffers(), setSamples(), samples()

Definition at line 812 of file qgl.cpp.

Referenced by QGLContext::chooseVisual(), QGLWindowSurface::hijackWindow(), pfiToQGLFormat(), QGLGraphicsSystem::QGLGraphicsSystem(), and QMeeGoGraphicsSystem::setTranslucent().

{
    setOption(enable ? QGL::SampleBuffers : QGL::NoSampleBuffers);
}

setSamples()

void QGLFormat::setSamples

(

int

numSamples

)

Set the preferred number of samples per pixel when multisampling is enabled to numSamples.

By default, the highest number of samples available is used.

See also

setSampleBuffers(), sampleBuffers(), samples()

Definition at line 836 of file qgl.cpp.

Referenced by QGLWindowSurface::hijackWindow(), pfiToQGLFormat(), QGLGraphicsSystem::QGLGraphicsSystem(), qt_glformat_from_eglconfig(), and QMeeGoGraphicsSystem::setTranslucent().

{
    detach();
    if (numSamples < 0) {
        qWarning("QGLFormat::setSamples: Cannot have negative number of samples per pixel %d", numSamples);
        return;
    }
    d->numSamples = numSamples;
    setSampleBuffers(numSamples > 0);
}

setStencil()

void QGLFormat::setStencil

(

bool

enable

)

If 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.

See also

stencil(), setStencilBufferSize()

Definition at line 724 of file qgl.cpp.

Referenced by QGLContext::chooseVisual(), pfdToQGLFormat(), pfiToQGLFormat(), and QGLGraphicsSystem::QGLGraphicsSystem().

{
    setOption(enable ? QGL::StencilBuffer: QGL::NoStencilBuffer);
}

setStencilBufferSize()

void QGLFormat::setStencilBufferSize

(

int

size

)

Set the preferred stencil buffer size to size.

See also

stencilBufferSize(), setStencil(), stencil()

Definition at line 1169 of file qgl.cpp.

Referenced by pfdToQGLFormat(), pfiToQGLFormat(), QGLGraphicsSystem::QGLGraphicsSystem(), and qt_glformat_from_eglconfig().

{
    detach();
    if (size < 0) {
        qWarning("QGLFormat::setStencilBufferSize: Cannot set negative stencil buffer size %d", size);
        return;
    }
    d->stencilSize = size;
    setStencil(size > 0);
}

setStereo()

void QGLFormat::setStereo

(

bool

enable

)

If 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.

See also

stereo()

Definition at line 754 of file qgl.cpp.

Referenced by QGLContext::chooseVisual(), pfdToQGLFormat(), pfiToQGLFormat(), QGLGraphicsSystem::QGLGraphicsSystem(), and qt_glformat_from_eglconfig().

{
    setOption(enable ? QGL::StereoBuffers : QGL::NoStereoBuffers);
}

setSwapInterval()

void QGLFormat::setSwapInterval

(

int

interval

)

Set the preferred swap interval.

Since

4.2

This can be used to sync the GL drawing into a system window to the vertical refresh of the screen. Setting an 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 WGL_EXT_swap_control and GLX_SGI_video_sync extensions are used, the 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 interval to 10, means there will be 10 vertical retraces between every buffer swap.

Under Windows the WGL_EXT_swap_control extension has to be present, and under X11 the GLX_SGI_video_sync extension has to be present.

Definition at line 868 of file qgl.cpp.

{
    detach();
    d->swapInterval = interval;
}

setVersion()

void QGLFormat::setVersion	(	int	major,
		int	minor
	)

Set the OpenGL version to the major and minor numbers.

Since

4.7

If a context compatible with the requested OpenGL version cannot be created, a context compatible with version 1.x is created instead.

See also

majorVersion(), minorVersion()

Definition at line 1202 of file qgl.cpp.

{
    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;
}

stencil()

bool QGLFormat::stencil ( ) const

inline

Returns true if the stencil buffer is enabled; otherwise returns false.

The stencil buffer is enabled by default.

See also

setStencil(), setStencilBufferSize()

Definition at line 638 of file qgl.h.

Referenced by buildSpec(), QGLContext::choosePixelFormat(), QGLContext::chooseVisual(), QGL2PaintEngineExPrivate::fill(), nearest_gl_texture_size(), pfdToQGLFormat(), pfiToQGLFormat(), QGLGraphicsSystem::QGLGraphicsSystem(), qt_eglproperties_set_glformat(), qt_format_to_attrib_list(), and QGLContextPrivate::tryFormat().

{
    return testOption(QGL::StencilBuffer);
}

stencilBufferSize()

int QGLFormat::stencilBufferSize

(

)

const

Returns the stencil buffer size.

See also

stencil(), setStencil(), setStencilBufferSize()

Definition at line 1185 of file qgl.cpp.

Referenced by buildSpec(), nearest_gl_texture_size(), pfiToQGLFormat(), qt_eglproperties_set_glformat(), qt_format_to_attrib_list(), and QGLContextPrivate::tryFormat().

{
   return d->stencilSize;
}

stereo()

bool QGLFormat::stereo ( ) const

inline

Returns true if stereo buffering is enabled; otherwise returns false.

Stereo buffering is disabled by default.

See also

setStereo()

Definition at line 643 of file qgl.h.

Referenced by buildSpec(), QGLContext::choosePixelFormat(), QGLContext::chooseVisual(), nearest_gl_texture_size(), pfiToQGLFormat(), qt_format_to_attrib_list(), and QGLContextPrivate::tryFormat().

{
    return testOption(QGL::StereoBuffers);
}

swapInterval()

int QGLFormat::swapInterval

(

)

const

Returns the currently set swap interval.

Since

4.2

-1 is returned if setting the swap interval isn't supported in the system GL implementation.

Definition at line 883 of file qgl.cpp.

{
    return d->swapInterval;
}

testOption()

bool QGLFormat::testOption

(

QGL::FormatOptions

opt

)

const

Returns true if format option opt is set; otherwise returns false.

See also

setOption()

Definition at line 971 of file qgl.cpp.

Referenced by qgl_create_context().

{
    if (opt & 0xffff)
       return (d->opts & opt) != 0;
    else
       return (d->opts & (opt >> 16)) == 0;
}

Friends and Related Functions

operator!=

bool operator!= ( const QGLFormat &  a, const QGLFormat &  b  )

friend

Returns false if all the options of the two QGLFormat objects a and b are equal; otherwise returns true.

Definition at line 1653 of file qgl.cpp.

{
    return !(a == b);
}

operator<<

Q_OPENGL_EXPORT QDebug operator<< ( QDebug  , const QGLFormat &    )

friend

Definition at line 1620 of file qgl.cpp.

{
    const QGLFormatPrivate * const d = f.d;

    dbg.nospace() << "QGLFormat("
                  << "options " << d->opts
                  << ", plane " << d->pln
                  << ", depthBufferSize " << d->depthSize
                  << ", accumBufferSize " << d->accumSize
                  << ", stencilBufferSize " << d->stencilSize
                  << ", redBufferSize " << d->redSize
                  << ", greenBufferSize " << d->greenSize
                  << ", blueBufferSize " << d->blueSize
                  << ", alphaBufferSize " << d->alphaSize
                  << ", samples " << d->numSamples
                  << ", swapInterval " << d->swapInterval
                  << ", majorVersion " << d->majorVersion
                  << ", minorVersion " << d->minorVersion
                  << ", profile " << d->profile
                  << ')';

    return dbg.space();
}

operator==

bool operator== ( const QGLFormat &  a, const QGLFormat &  b  )

friend

Returns true if all the options of the two QGLFormat objects a and b are equal; otherwise returns false.

Definition at line 1601 of file qgl.cpp.

{
    return (a.d == b.d) || ((int) a.d->opts == (int) b.d->opts
        && a.d->pln == b.d->pln
        && 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);
}

Properties

d

QGLFormatPrivate* QGLFormat::d

private

Definition at line 290 of file qgl.h.

Referenced by QGLContext::doneCurrent(), QGLContext::makeCurrent(), operator=(), qDeleteQGLContext(), QGLFormat(), QGLContext::reset(), and QGLContext::swapBuffers().

---

The documentation for this class was generated from the following files:

• /src/opengl/qgl.h
• /src/opengl/qgl.cpp
• /src/opengl/qgl_egl.cpp
• /src/opengl/qgl_mac.mm
• /src/opengl/qgl_qpa.cpp
• /src/opengl/qgl_qws.cpp
• /src/opengl/qgl_win.cpp
• /src/opengl/qgl_wince.cpp
• /src/opengl/qgl_x11.cpp
• /src/opengl/qgl_x11egl.cpp