void swapBuffers()
{
// If there is a xpixmap, we are on the reading side and do not want to swap any buffers.
// The buffers are being switched on the writing side, the reading side just reads
// whatever texture the XWindow contains.
if (m_xPixmap)
return;
if (!m_surface->isVisible())
return;
// Creating and exposing the surface is asynchronous. Therefore we have to wait here
// before swapping the buffers. This should only be the case for the very first frame.
while (!m_surface->isExposed())
QCoreApplication::processEvents();
QOpenGLContext* glContext = QOpenGLContext::currentContext();
if (m_surface && glContext) {
GLint oldFBO;
glGetIntegerv(GL_FRAMEBUFFER_BINDING, &oldFBO);
pGlBindFramebuffer(GL_FRAMEBUFFER, glContext->defaultFramebufferObject());
glContext->swapBuffers(m_surface.get());
pGlBindFramebuffer(GL_FRAMEBUFFER, oldFBO);
}
}
/*!
\fn bool QOpenGLFramebufferObject::bindDefault()
Switches rendering back to the default, windowing system provided
framebuffer.
Returns \c true upon success, false otherwise.
\sa bind(), release()
*/
bool QOpenGLFramebufferObject::bindDefault()
{
QOpenGLContext *ctx = const_cast<QOpenGLContext *>(QOpenGLContext::currentContext());
QOpenGLFunctions functions(ctx);
if (ctx) {
ctx->d_func()->current_fbo = ctx->defaultFramebufferObject();
functions.glBindFramebuffer(GL_FRAMEBUFFER, ctx->d_func()->current_fbo);
#ifdef QT_DEBUG
} else {
qWarning("QOpenGLFramebufferObject::bindDefault() called without current context.");
#endif
}
return ctx != 0;
}
/*!
\fn bool QOpenGLFramebufferObject::release()
Switches rendering back to the default, windowing system provided
framebuffer.
Returns \c true upon success, false otherwise.
\sa bind()
*/
bool QOpenGLFramebufferObject::release()
{
if (!isValid())
return false;
QOpenGLContext *current = QOpenGLContext::currentContext();
if (!current)
return false;
Q_D(QOpenGLFramebufferObject);
#ifdef QT_DEBUG
if (current->shareGroup() != d->fbo_guard->group())
qWarning("QOpenGLFramebufferObject::release() called from incompatible context");
#endif
if (current) {
current->d_func()->current_fbo = current->defaultFramebufferObject();
d->funcs.glBindFramebuffer(GL_FRAMEBUFFER, current->d_func()->current_fbo);
}
return true;
}
