mdevobj.h File Reference

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Classes
struct	_MDEVDISPLAY
struct	_MDEVOBJ

Typedefs
typedef struct _PDEVOBJ *	PPDEVOBJ
typedef struct _MDEVDISPLAY	MDEVDISPLAY
typedef struct _MDEVDISPLAY *	PMDEVDISPLAY
typedef struct _MDEVOBJ	MDEVOBJ
typedef struct _MDEVOBJ *	PMDEVOBJ

Functions
VOID	MDEVOBJ_vEnable (_Inout_ PMDEVOBJ pmdev)
BOOL	MDEVOBJ_bDisable (_Inout_ PMDEVOBJ pmdev)
PMDEVOBJ	MDEVOBJ_Create (_In_opt_ PUNICODE_STRING pustrDeviceName, _In_opt_ PDEVMODEW pdm)
VOID	MDEVOBJ_vDestroy (_Inout_ PMDEVOBJ pmdev)

Variables
PMDEVOBJ	gpmdev

Typedef Documentation

MDEVDISPLAY

typedef struct _MDEVDISPLAY MDEVDISPLAY

MDEVOBJ

typedef struct _MDEVOBJ MDEVOBJ

PMDEVDISPLAY

typedef struct _MDEVDISPLAY * PMDEVDISPLAY

PMDEVOBJ

typedef struct _MDEVOBJ * PMDEVOBJ

PPDEVOBJ

typedef struct _PDEVOBJ* PPDEVOBJ

Definition at line 6 of file mdevobj.h.

Function Documentation

MDEVOBJ_bDisable()

BOOL MDEVOBJ_bDisable

(

_Inout_ PMDEVOBJ

pmdev

)

Definition at line 29 of file mdevobj.c.

{
    BOOL bSuccess = TRUE;
    ULONG i, j;
 
    for (i = 0; i < pmdev->cDev; i++)
    {
        if (!PDEVOBJ_bDisableDisplay(pmdev->dev[i].ppdev))
        {
            bSuccess = FALSE;
            break;
        }
    }
 
    if (!bSuccess)
    {
        /* Failed to disable all PDEVs. Reenable those we have disabled */
        for (j = 0; j < i; j++)
        {
            PDEVOBJ_vEnableDisplay(pmdev->dev[i].ppdev);
        }
    }
 
    return bSuccess;
}

Referenced by PDEVOBJ_lChangeDisplaySettings().

MDEVOBJ_Create()

PMDEVOBJ MDEVOBJ_Create	(	_In_opt_ PUNICODE_STRING	pustrDeviceName,
		_In_opt_ PDEVMODEW	pdm
	)

Definition at line 57 of file mdevobj.c.

{
    PMDEVOBJ pmdev = NULL;
    PPDEVOBJ ppdev;
    PGRAPHICS_DEVICE pGraphicsDevice;
    DEVMODEW dmDefault;
    PDEVMODEW localPdm;
    ULONG iDevNum = 0;
    ULONG dwAccelerationLevel = 0;
 
    TRACE("MDEVOBJ_Create('%wZ' '%dx%dx%d (%d Hz)')\n",
        pustrDeviceName,
        pdm ? pdm->dmPelsWidth : 0,
        pdm ? pdm->dmPelsHeight : 0,
        pdm ? pdm->dmBitsPerPel : 0,
        pdm ? pdm->dmDisplayFrequency : 0);
 
    pmdev = ExAllocatePoolZero(PagedPool, sizeof(MDEVOBJ) + sizeof(MDEVDISPLAY), GDITAG_MDEV);
    if (!pmdev)
    {
        ERR("Failed to allocate memory for MDEV\n");
        return NULL;
    }
 
    pmdev->cDev = 0;
 
    while (TRUE)
    {
        /* Get the right graphics devices: either the specified one, or all of them (one after one) */
        if (pustrDeviceName)
            pGraphicsDevice = (iDevNum == 0) ? EngpFindGraphicsDevice(pustrDeviceName, 0) : NULL;
        else
            pGraphicsDevice = EngpFindGraphicsDevice(NULL, iDevNum);
        iDevNum++;
 
        if (!pGraphicsDevice)
        {
            TRACE("Done enumeration of graphic devices (DeviceName '%wZ' iDevNum %d)\n", pustrDeviceName, iDevNum);
            break;
        }
 
        if (!pdm)
        {
            /* No settings requested. Provide nothing and LDEVOBJ_bProbeAndCaptureDevmode
             * will read default settings from registry */
            RtlZeroMemory(&dmDefault, sizeof(dmDefault));
            dmDefault.dmSize = sizeof(dmDefault);
        }
 
        dwAccelerationLevel = EngpGetDisplayDriverAccelerationLevel(pGraphicsDevice);
 
        /* Get or create a PDEV for these settings */
        if (LDEVOBJ_bProbeAndCaptureDevmode(pGraphicsDevice, pdm ? pdm : &dmDefault, &localPdm, !pdm))
        {
            ppdev = PDEVOBJ_Create(pGraphicsDevice, localPdm, dwAccelerationLevel, LDEV_DEVICE_DISPLAY);
        }
        else
        {
            ppdev = NULL;
        }
 
        if (ppdev)
        {
            /* Great. We have a found a matching PDEV. Store it in MDEV */
            if (pmdev->cDev >= 1)
            {
                /* We have to reallocate MDEV to add space for the new display */
                PMDEVOBJ pmdevBigger = ExAllocatePoolZero(PagedPool, sizeof(MDEVOBJ) + (pmdev->cDev + 1) * sizeof(MDEVDISPLAY), GDITAG_MDEV);
                if (!pmdevBigger)
                {
                    WARN("Failed to allocate memory for MDEV. Skipping display '%S'\n", pGraphicsDevice->szWinDeviceName);
                    continue;
                }
                else
                {
                    /* Copy existing data */
                    RtlCopyMemory(pmdevBigger, pmdev, sizeof(MDEVOBJ) + pmdev->cDev * sizeof(MDEVDISPLAY));
                    ExFreePoolWithTag(pmdev, GDITAG_MDEV);
                    pmdev = pmdevBigger;
                }
            }
 
            TRACE("Adding '%S' to MDEV %p\n", pGraphicsDevice->szWinDeviceName, pmdev);
            PDEVOBJ_vReference(ppdev);
            pmdev->dev[pmdev->cDev].ppdev = ppdev;
            pmdev->cDev++;
        }
        else
        {
            WARN("Failed to add '%S' to MDEV %p\n", pGraphicsDevice->szWinDeviceName, pmdev);
        }
    }
 
    if (pmdev->cDev == 0)
    {
        TRACE("Failed to add any device to MDEV. Returning NULL\n");
        MDEVOBJ_vDestroy(pmdev);
        return NULL;
    }
 
    TRACE("Returning new MDEV %p with %d devices\n", pmdev, pmdev->cDev);
    return pmdev;
}

Referenced by PDEVOBJ_lChangeDisplaySettings().

MDEVOBJ_vDestroy()

VOID MDEVOBJ_vDestroy

(

_Inout_ PMDEVOBJ

pmdev

)

Definition at line 164 of file mdevobj.c.

{
    ULONG i;
 
    for (i = 0; i < pmdev->cDev; i++)
    {
        PDEVOBJ_vRelease(pmdev->dev[i].ppdev);
    }
 
    if (pmdev->cDev > 1)
        PDEVOBJ_vRelease(pmdev->ppdevGlobal);
 
    ExFreePoolWithTag(pmdev, GDITAG_MDEV);
}

Referenced by MDEVOBJ_Create(), and PDEVOBJ_lChangeDisplaySettings().

MDEVOBJ_vEnable()

VOID MDEVOBJ_vEnable

(

_Inout_ PMDEVOBJ

pmdev

)

Definition at line 17 of file mdevobj.c.

{
    ULONG i;
 
    for (i = 0; i < pmdev->cDev; i++)
    {
        PDEVOBJ_vEnableDisplay(pmdev->dev[i].ppdev);
    }
}

Referenced by PDEVOBJ_lChangeDisplaySettings().

Variable Documentation

gpmdev

PMDEVOBJ gpmdev

extern

Definition at line 14 of file mdevobj.c.

Referenced by co_IntInitializeDesktopGraphics(), DC_vInitDc(), EBRUSHOBJ_bRealizeBrush(), EBRUSHOBJ_psoMask(), EngpGetPDEV(), InitMetrics(), IntCreatePrimarySurface(), IntEnumHDev(), PDEVOBJ_bSwitchMode(), and VideoPortCallout().