C++ MythMainWindow::GetMainStack方法代码示例

void MythScreenStack::PopScreen(MythScreenType *screen, bool allowFade,
                                bool deleteScreen)
{
    if (!screen || screen->IsDeleting())
        return;

    screen->aboutToHide();

    if (m_Children.isEmpty())
        return;

    MythMainWindow *mainwindow = GetMythMainWindow();

    screen->setParent(0);
    if ((screen == m_topScreen) && allowFade && m_DoTransitions
        && !mainwindow->IsExitingToMain())
    {
        screen->SetFullscreen(false);
        if (deleteScreen)
        {
            screen->SetDeleting(true);
            m_ToDelete.push_back(screen);
        }
        screen->AdjustAlpha(1, -kFadeVal);
    }
    else
    {
        for (int i = 0; i < m_Children.size(); ++i)
        {
            if (m_Children.at(i) == screen)
                m_Children.remove(i);
        }
        if (deleteScreen)
            delete screen;

        screen = NULL;

        mainwindow->update();
        if (mainwindow->IsExitingToMain())
        {
            QCoreApplication::postEvent(
                mainwindow, new QEvent(MythEvent::kExitToMainMenuEventType));
        }
    }

    m_topScreen = NULL;

    RecalculateDrawOrder();

    // If we're fading it, we still want to draw it.
    if (screen)
        m_DrawOrder.push_back(screen);

    if (!m_Children.isEmpty())
    {
        QVector<MythScreenType *>::Iterator it;
        for (it = m_DrawOrder.begin(); it != m_DrawOrder.end(); ++it)
        {
            if (*it != screen && !(*it)->IsDeleting())
            {
                m_topScreen = (*it);
                (*it)->SetAlpha(255);
                (*it)->aboutToShow();
            }
        }
    }

    if (m_topScreen)
    {
        m_topScreen->SetRedraw();

        if (!allowFade || !m_DoTransitions)
            emit topScreenChanged(m_topScreen);
    }
    else
    {
        // Screen still needs to be redrawn if we have popped the last screen
        // off the popup stack, or similar
        MythScreenType *mainscreen = mainwindow->GetMainStack()->GetTopScreen();
        if (mainscreen)
            mainscreen->SetRedraw();

        if (!allowFade || !m_DoTransitions)
            emit topScreenChanged(NULL);
    }
}

void VideoOutputOpenGL::PrepareFrame(VideoFrame *buffer, FrameScanType t,
                                     OSD *osd)
{
    if (!gl_context)
        return;

    OpenGLLocker ctx_lock(gl_context);

    if (!buffer)
    {
        buffer = vbuffers.GetScratchFrame();
        if (m_deinterlacing && !IsBobDeint())
            t = kScan_Interlaced;
    }

    gl_context_lock.lock();
    framesPlayed = buffer->frameNumber + 1;
    gl_context_lock.unlock();

    gl_context->BindFramebuffer(0);
    if (db_letterbox_colour == kLetterBoxColour_Gray25)
        gl_context->SetBackground(127, 127, 127, 255);
    else
        gl_context->SetBackground(0, 0, 0, 255);
    gl_context->ClearFramebuffer();

    // stereoscopic views
    QRect main   = gl_context->GetViewPort();
    QRect first  = main;
    QRect second = main;
    bool twopass = (m_stereo == kStereoscopicModeSideBySide) ||
                   (m_stereo == kStereoscopicModeTopAndBottom);

    if (kStereoscopicModeSideBySide == m_stereo)
    {
        first  = QRect(main.left() / 2,  main.top(),
                       main.width() / 2, main.height());
        second = first.translated(main.width() / 2, 0);
    }
    else if (kStereoscopicModeTopAndBottom == m_stereo)
    {
        first  = QRect(main.left(),  main.top() / 2,
                       main.width(), main.height() / 2);
        second = first.translated(0, main.height() / 2);
    }

    // main UI when embedded
    MythMainWindow *mwnd = GetMythMainWindow();
    if (mwnd && mwnd->GetPaintWindow() && window.IsEmbedding())
    {
        if (twopass)
            gl_context->SetViewPort(first, true);
        mwnd->GetPaintWindow()->clearMask();
        // Must force a UI redraw when embedded.  If not, when the EPG or
        // finder screen is popped up over the video and the user then clicks
        // away from Myth, the UI is left blank.
        mwnd->GetMainStack()->GetTopScreen()->SetRedraw();
        mwnd->draw(gl_painter);
        if (twopass)
        {
            gl_context->SetViewPort(second, true);
            mwnd->GetPaintWindow()->clearMask();
            mwnd->GetMainStack()->GetTopScreen()->SetRedraw();
            mwnd->draw(gl_painter);
            gl_context->SetViewPort(main, true);
        }
    }

    // video
    if (gl_videochain && !buffer->dummy)
    {
        gl_videochain->SetVideoRect(vsz_enabled ? vsz_desired_display_rect :
                                                  window.GetDisplayVideoRect(),
                                    window.GetVideoRect());
        gl_videochain->PrepareFrame(buffer->top_field_first, t,
                                    m_deinterlacing, framesPlayed, m_stereo);
    }

    // PiPs/PBPs
    if (gl_pipchains.size())
    {
        QMap<MythPlayer*,OpenGLVideo*>::iterator it = gl_pipchains.begin();
        for (; it != gl_pipchains.end(); ++it)
        {
            if (gl_pip_ready[it.key()])
            {
                bool active = gl_pipchain_active == *it;
                if (twopass)
                    gl_context->SetViewPort(first, true);
                (*it)->PrepareFrame(buffer->top_field_first, t,
                                    m_deinterlacing, framesPlayed,
                                    kStereoscopicModeNone, active);
                if (twopass)
                {
                    gl_context->SetViewPort(second, true);
                    (*it)->PrepareFrame(buffer->top_field_first, t,
                                    m_deinterlacing, framesPlayed,
                                    kStereoscopicModeNone, active);
                    gl_context->SetViewPort(main);
                }
//.........这里部分代码省略.........

void MythNotificationScreenStack::PopScreen(MythScreenType *screen, bool allowFade,
                                            bool deleteScreen)
{
    if (!screen || screen->IsDeleting())
        return;

    bool poppedFullscreen = screen->IsFullscreen();

    screen->aboutToHide();

    if (m_Children.isEmpty())
        return;

    MythMainWindow *mainwindow = GetMythMainWindow();

    screen->setParent(0);
    if (allowFade && m_DoTransitions && !mainwindow->IsExitingToMain())
    {
        screen->SetFullscreen(false);
        if (deleteScreen)
        {
            screen->SetDeleting(true);
            m_ToDelete.push_back(screen);
        }
        screen->AdjustAlpha(1, -kFadeVal);
    }
    else
    {
        for (int i = 0; i < m_Children.size(); ++i)
        {
            if (m_Children.at(i) == screen)
            {
                m_Children.remove(i);
                break;
            }
        }
        if (deleteScreen)
            screen->deleteLater();

        screen = NULL;
    }

    m_topScreen = NULL;

    RecalculateDrawOrder();

    // If we're fading it, we still want to draw it.
    if (screen && !m_DrawOrder.contains(screen))
        m_DrawOrder.push_back(screen);

    if (!m_Children.isEmpty())
    {
        QVector<MythScreenType *>::Iterator it;
        for (it = m_DrawOrder.begin(); it != m_DrawOrder.end(); ++it)
        {
            if (*it != screen && !(*it)->IsDeleting())
            {
                m_topScreen = (*it);
                (*it)->SetAlpha(255);
                if (poppedFullscreen)
                    (*it)->aboutToShow();
            }
        }
    }

    if (m_topScreen)
    {
        m_topScreen->SetRedraw();
    }
    else
    {
        // Screen still needs to be redrawn if we have popped the last screen
        // off the popup stack, or similar
        if (mainwindow->GetMainStack())
        {
            MythScreenType *mainscreen = mainwindow->GetMainStack()->GetTopScreen();
            if (mainscreen)
                mainscreen->SetRedraw();
        }
    }
}