C++ PPDMIVMMDEVPORT::pfnVBVAChange方法代码示例

int Display::i_videoAccelEnable(bool fEnable, VBVAMEMORY *pVbvaMemory, PPDMIDISPLAYPORT pUpPort)
{
    int rc = VINF_SUCCESS;

    VIDEOACCEL *pVideoAccel = &mVideoAccelLegacy;

    /* Called each time the guest wants to use acceleration,
     * or when the VGA device disables acceleration,
     * or when restoring the saved state with accel enabled.
     *
     * VGA device disables acceleration on each video mode change
     * and on reset.
     *
     * Guest enabled acceleration at will. And it has to enable
     * acceleration after a mode change.
     */
    LogRelFlowFunc(("mfVideoAccelEnabled = %d, fEnable = %d, pVbvaMemory = %p\n",
                  pVideoAccel->fVideoAccelEnabled, fEnable, pVbvaMemory));

    /* Strictly check parameters. Callers must not pass anything in the case. */
    Assert((fEnable && pVbvaMemory) || (!fEnable && pVbvaMemory == NULL));

    if (!i_VideoAccelAllowed ())
        return VERR_NOT_SUPPORTED;

    /* Check that current status is not being changed */
    if (pVideoAccel->fVideoAccelEnabled == fEnable)
        return rc;

    if (pVideoAccel->fVideoAccelEnabled)
    {
        /* Process any pending orders and empty the VBVA ring buffer. */
        i_videoAccelFlush (pUpPort);
    }

    if (!fEnable && pVideoAccel->pVbvaMemory)
        pVideoAccel->pVbvaMemory->fu32ModeFlags &= ~VBVA_F_MODE_ENABLED;

    if (fEnable)
    {
        /* Process any pending VGA device changes, resize. */
        pUpPort->pfnUpdateDisplayAll(pUpPort, /* fFailOnResize = */ false);
    }

    /* Protect the videoaccel state transition. */
    RTCritSectEnter(&mVideoAccelLock);

    if (fEnable)
    {
        /* Initialize the hardware memory. */
        i_vbvaSetMemoryFlags(pVbvaMemory, true, mfVideoAccelVRDP,
                             mfu32SupportedOrders, maFramebuffers, mcMonitors);
        pVbvaMemory->off32Data = 0;
        pVbvaMemory->off32Free = 0;

        memset(pVbvaMemory->aRecords, 0, sizeof(pVbvaMemory->aRecords));
        pVbvaMemory->indexRecordFirst = 0;
        pVbvaMemory->indexRecordFree = 0;

        pVideoAccel->pVbvaMemory = pVbvaMemory;
        pVideoAccel->fVideoAccelEnabled = true;

        LogRel(("VBVA: Enabled.\n"));
    }
    else
    {
        pVideoAccel->pVbvaMemory = NULL;
        pVideoAccel->fVideoAccelEnabled = false;

        LogRel(("VBVA: Disabled.\n"));
    }

    RTCritSectLeave(&mVideoAccelLock);

    if (!fEnable)
    {
        pUpPort->pfnUpdateDisplayAll(pUpPort, /* fFailOnResize = */ false);
    }

    /* Notify the VMMDev, which saves VBVA status in the saved state,
     * and needs to know current status.
     */
    VMMDev *pVMMDev = mParent->i_getVMMDev();
    if (pVMMDev)
    {
        PPDMIVMMDEVPORT pVMMDevPort = pVMMDev->getVMMDevPort();
        if (pVMMDevPort)
            pVMMDevPort->pfnVBVAChange(pVMMDevPort, fEnable);
    }

    LogRelFlowFunc(("%Rrc.\n", rc));
    return rc;
}

/**
 * @thread EMT
 */
int Display::VideoAccelEnable (bool fEnable, VBVAMEMORY *pVbvaMemory)
{
    int rc = VINF_SUCCESS;

    /* Called each time the guest wants to use acceleration,
     * or when the VGA device disables acceleration,
     * or when restoring the saved state with accel enabled.
     *
     * VGA device disables acceleration on each video mode change
     * and on reset.
     *
     * Guest enabled acceleration at will. And it needs to enable
     * acceleration after a mode change.
     */
    LogFlow(("Display::VideoAccelEnable: mfVideoAccelEnabled = %d, fEnable = %d, pVbvaMemory = %p\n",
              mfVideoAccelEnabled, fEnable, pVbvaMemory));

    /* Strictly check parameters. Callers must not pass anything in the case. */
    Assert((fEnable && pVbvaMemory) || (!fEnable && pVbvaMemory == NULL));

    if (!VideoAccelAllowed ())
        return VERR_NOT_SUPPORTED;

    /*
     * Verify that the VM is in running state. If it is not,
     * then this must be postponed until it goes to running.
     */
    if (!mfMachineRunning)
    {
        Assert (!mfVideoAccelEnabled);

        LogFlow(("Display::VideoAccelEnable: Machine is not yet running.\n"));

        if (fEnable)
        {
            mfPendingVideoAccelEnable = fEnable;
            mpPendingVbvaMemory = pVbvaMemory;
        }

        return rc;
    }

    /* Check that current status is not being changed */
    if (mfVideoAccelEnabled == fEnable)
        return rc;

    if (mfVideoAccelEnabled)
    {
        /* Process any pending orders and empty the VBVA ring buffer. */
        VideoAccelFlush ();
    }

    if (!fEnable && mpVbvaMemory)
        mpVbvaMemory->fu32ModeFlags &= ~VBVA_F_MODE_ENABLED;

    /* Safety precaution. There is no more VBVA until everything is setup! */
    mpVbvaMemory = NULL;
    mfVideoAccelEnabled = false;

    /* Update entire display. */
    mpDrv->pUpPort->pfnUpdateDisplayAll(mpDrv->pUpPort);

    /* Everything OK. VBVA status can be changed. */

    /* Notify the VMMDev, which saves VBVA status in the saved state,
     * and needs to know current status.
     */
    PPDMIVMMDEVPORT pVMMDevPort = gVMMDev->getVMMDevPort ();

    if (pVMMDevPort)
        pVMMDevPort->pfnVBVAChange (pVMMDevPort, fEnable);

    if (fEnable)
    {
        mpVbvaMemory = pVbvaMemory;
        mfVideoAccelEnabled = true;

        /* Initialize the hardware memory. */
        vbvaSetMemoryFlags (mpVbvaMemory, mfVideoAccelEnabled, false);
        mpVbvaMemory->off32Data = 0;
        mpVbvaMemory->off32Free = 0;

        memset (mpVbvaMemory->aRecords, 0, sizeof (mpVbvaMemory->aRecords));
        mpVbvaMemory->indexRecordFirst = 0;
        mpVbvaMemory->indexRecordFree = 0;

        LogRel(("VBVA: Enabled.\n"));
    }
    else
    {
        LogRel(("VBVA: Disabled.\n"));
    }

    LogFlow(("Display::VideoAccelEnable: rc = %Rrc.\n", rc));

    return rc;
}