QGLContextGroup Class Reference

#include <qgl_p.h>

Public Functions
void	addGuard (QGLSharedResourceGuard *guard)
const QGLContext *	context () const
QGLExtensionFuncs &	extensionFuncs ()
bool	isSharing () const
void	removeGuard (QGLSharedResourceGuard *guard)
QList< const QGLContext * >	shares () const
	~QGLContextGroup ()

Private Functions
	QGLContextGroup (const QGLContext *context)

Properties
const QGLContext *	m_context
QGLExtensionFuncs	m_extensionFuncs
QGLSharedResourceGuard *	m_guards
QAtomicInt	m_refs
QHash< QGLContextGroupResourceBase *, void * >	m_resources
QList< const QGLContext * >	m_shares

Friends
class	QGLContext
class	QGLContextGroupResourceBase
class	QGLContextPrivate
static void	addShare (const QGLContext *context, const QGLContext *share)
static void	removeShare (const QGLContext *context)
void	cleanupResources (const QGLContext *ctx)

Detailed Description

Definition at line 246 of file qgl_p.h.

Constructors and Destructors

~QGLContextGroup()

QGLContextGroup::~QGLContextGroup

(

)

Definition at line 1685 of file qgl.cpp.

{
    // Clear any remaining QGLSharedResourceGuard objects on the group.
    QGLSharedResourceGuard *guard = m_guards;
    while (guard != 0) {
        guard->m_group = 0;
        guard->m_id = 0;
        guard = guard->m_next;
    }
    qt_context_groups()->remove(this);
}

QGLContextGroup()

QGLContextGroup::QGLContextGroup ( const QGLContext *  context )

private

Definition at line 1679 of file qgl.cpp.

    : m_context(context), m_guards(0), m_refs(1)
{
    qt_context_groups()->append(this);
}

Functions

addGuard()

void QGLContextGroup::addGuard

(

QGLSharedResourceGuard *

guard

)

Definition at line 1697 of file qgl.cpp.

{
    if (m_guards)
        m_guards->m_prev = guard;
    guard->m_next = m_guards;
    guard->m_prev = 0;
    m_guards = guard;
}

addShare()

void QGLContextGroup::addShare ( const QGLContext *  context, const QGLContext *  share  )

static

Definition at line 5846 of file qgl.cpp.

Referenced by QGLPixelBufferPrivate::common_init(), and QX11GLPixmapData::paintEngine().

                                                                                 {
    Q_ASSERT(context && share);
    if (context->d_ptr->group == share->d_ptr->group)
        return;

    // Make sure 'context' is not already shared with another group of contexts.
    Q_ASSERT(context->d_ptr->group->m_refs == 1);

    // Free 'context' group resources and make it use the same resources as 'share'.
    QGLContextGroup *group = share->d_ptr->group;
    delete context->d_ptr->group;
    context->d_ptr->group = group;
    group->m_refs.ref();

    // Maintain a list of all the contexts in each group of sharing contexts.
    // The list is empty if the "share" context wasn't sharing already.
    if (group->m_shares.isEmpty())
        group->m_shares.append(share);
    group->m_shares.append(context);
}

cleanupResources()

void QGLContextGroup::cleanupResources ( const QGLContext *  ctx )

private

Definition at line 5961 of file qgl.cpp.

{
    // Notify all resources that a context has been deleted
    QHash<QGLContextGroupResourceBase *, void *>::ConstIterator it;
    for (it = m_resources.begin(); it != m_resources.end(); ++it)
        it.key()->contextDeleted(context);

    // If there are still shares, then no cleanup to be done yet.
    if (m_shares.size() > 1)
        return;

    // Iterate over all resources and free each in turn.
    for (it = m_resources.begin(); it != m_resources.end(); ++it)
        it.key()->cleanup(context, it.value());
}

context()

const QGLContext* QGLContextGroup::context ( ) const

inline

Definition at line 252 of file qgl_p.h.

Referenced by QGL2PaintEngineExPrivate::drawCachedGlyphs().

{return m_context;}

extensionFuncs()

QGLExtensionFuncs& QGLContextGroup::extensionFuncs ( )

inline

Definition at line 251 of file qgl_p.h.

Referenced by QGLContextPrivate::extensionFuncs().

{return m_extensionFuncs;}

isSharing()

bool QGLContextGroup::isSharing ( ) const

inline

Definition at line 253 of file qgl_p.h.

{ return m_shares.size() >= 2; }

removeGuard()

void QGLContextGroup::removeGuard

(

QGLSharedResourceGuard *

guard

)

Definition at line 1706 of file qgl.cpp.

{
    if (guard->m_next)
        guard->m_next->m_prev = guard->m_prev;
    if (guard->m_prev)
        guard->m_prev->m_next = guard->m_next;
    else
        m_guards = guard->m_next;
}

removeShare()

void QGLContextGroup::removeShare ( const QGLContext *  context )

static

Definition at line 5867 of file qgl.cpp.

Referenced by QGLContext::chooseMacVisual(), QGLContext::choosePixelFormat(), qDeleteQGLContext(), QGLContext::reset(), and QGLContext::tryVisual().

                                                           {
    // Remove the context from the group.
    QGLContextGroup *group = context->d_ptr->group;
    if (group->m_shares.isEmpty())
        return;
    group->m_shares.removeAll(context);

    // Update context group representative.
    Q_ASSERT(group->m_shares.size() != 0);
    if (group->m_context == context)
        group->m_context = group->m_shares[0];

    // If there is only one context left, then make the list empty.
    if (group->m_shares.size() == 1)
        group->m_shares.clear();
}

shares()

QList<const QGLContext *> QGLContextGroup::shares ( ) const

inline

Definition at line 254 of file qgl_p.h.

{ return m_shares; }

Friends and Related Functions

QGLContext

friend class QGLContext

friend

Definition at line 274 of file qgl_p.h.

QGLContextGroupResourceBase

friend class QGLContextGroupResourceBase

friend

Definition at line 276 of file qgl_p.h.

QGLContextPrivate

friend class QGLContextPrivate

friend

Definition at line 275 of file qgl_p.h.

Properties

m_context

const QGLContext* QGLContextGroup::m_context

private

Definition at line 266 of file qgl_p.h.

m_extensionFuncs

QGLExtensionFuncs QGLContextGroup::m_extensionFuncs

private

Definition at line 265 of file qgl_p.h.

m_guards

QGLSharedResourceGuard* QGLContextGroup::m_guards

private

Definition at line 269 of file qgl_p.h.

m_refs

QAtomicInt QGLContextGroup::m_refs

private

Definition at line 270 of file qgl_p.h.

m_resources

QHash<QGLContextGroupResourceBase *, void *> QGLContextGroup::m_resources

private

Definition at line 268 of file qgl_p.h.

m_shares

QList<const QGLContext *> QGLContextGroup::m_shares

private

Definition at line 267 of file qgl_p.h.

---

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

• /src/opengl/qgl_p.h
• /src/opengl/qgl.cpp