surface.c File Reference

#include <win32k.h>
#include <debug.h>

Include dependency graph for surface.c:

Go to the source code of this file.

Macros
#define	NDEBUG

Functions
ULONG FASTCALL	BitmapFormat (ULONG cBits, ULONG iCompression)
VOID NTAPI	SURFACE_vCleanup (PVOID ObjectBody)
PSURFACE NTAPI	SURFACE_AllocSurface (_In_ USHORT iType, _In_ ULONG cx, _In_ ULONG cy, _In_ ULONG iFormat, _In_ ULONG fjBitmap, _In_opt_ ULONG cjWidth, _In_opt_ ULONG cjBufSize, _In_opt_ PVOID pvBits)
HBITMAP APIENTRY	EngCreateBitmap (_In_ SIZEL sizl, _In_ LONG lWidth, _In_ ULONG iFormat, _In_ ULONG fl, _In_opt_ PVOID pvBits)
HBITMAP APIENTRY	EngCreateDeviceBitmap (_In_ DHSURF dhsurf, _In_ SIZEL sizl, _In_ ULONG iFormat)
HSURF APIENTRY	EngCreateDeviceSurface (_In_ DHSURF dhsurf, _In_ SIZEL sizl, _In_ ULONG iFormat)
BOOL APIENTRY	EngAssociateSurface (_In_ HSURF hsurf, _In_ HDEV hdev, _In_ FLONG flHooks)
BOOL APIENTRY	EngModifySurface (_In_ HSURF hsurf, _In_ HDEV hdev, _In_ FLONG flHooks, _In_ FLONG flSurface, _In_ DHSURF dhsurf, _In_ PVOID pvScan0, _In_ LONG lDelta, _Reserved_ PVOID pvReserved)
BOOL APIENTRY	EngDeleteSurface (_In_ _Post_ptr_invalid_ HSURF hsurf)
BOOL APIENTRY	EngEraseSurface (_In_ SURFOBJ *pso, _In_ RECTL *prcl, _In_ ULONG iColor)
SURFOBJ *APIENTRY	NtGdiEngLockSurface (IN HSURF hsurf)
SURFOBJ *APIENTRY	EngLockSurface (_In_ HSURF hsurf)
__kernel_entry NTSTATUS APIENTRY	NtGdiEngUnlockSurface (_In_ SURFOBJ *pso)
VOID APIENTRY	EngUnlockSurface (_In_ _Post_ptr_invalid_ SURFOBJ *pso)

Variables
LONG	giUniqueSurface = 0
UCHAR	gajBitsPerFormat [11]

Macro Definition Documentation

NDEBUG

#define NDEBUG

Definition at line 15 of file surface.c.

Function Documentation

BitmapFormat()

ULONG FASTCALL BitmapFormat	(	ULONG	cBits,
		ULONG	iCompression
	)

Definition at line 39 of file surface.c.

{
    switch (iCompression)
    {
        case BI_RGB:
            /* Fall through */
        case BI_BITFIELDS:
            if (cBits <= 1) return BMF_1BPP;
            if (cBits <= 4) return BMF_4BPP;
            if (cBits <= 8) return BMF_8BPP;
            if (cBits <= 16) return BMF_16BPP;
            if (cBits <= 24) return BMF_24BPP;
            if (cBits <= 32) return BMF_32BPP;
            return 0;
 
        case BI_RLE4:
            return BMF_4RLE;
 
        case BI_RLE8:
            return BMF_8RLE;
 
        default:
            return 0;
    }
}

Referenced by DIB_CreateDIBSection(), GreCreateBitmap(), IntCreateDIBitmap(), IntSetDIBits(), NtGdiCreateBitmap(), NtGdiDdDDICreateDCFromMemory(), NtGdiSetDIBitsToDeviceInternal(), and NtGdiStretchDIBitsInternal().

EngAssociateSurface()

BOOL APIENTRY EngAssociateSurface	(	_In_ HSURF	hsurf,
		_In_ HDEV	hdev,
		_In_ FLONG	flHooks
	)

Definition at line 431 of file surface.c.

{
    SURFOBJ *pso;
    PSURFACE psurf;
    PDEVOBJ* ppdev;
    PPALETTE ppal;
 
    ppdev = (PDEVOBJ*)hdev;
 
    /* Lock the surface */
    psurf = SURFACE_ShareLockSurface(hsurf);
    if (!psurf)
    {
        return FALSE;
    }
    pso = &psurf->SurfObj;
 
    /* Associate the hdev */
    pso->hdev = hdev;
    pso->dhpdev = ppdev->dhpdev;
 
    /* Hook up specified functions */
    psurf->flags &= ~HOOK_FLAGS;
    psurf->flags |= (flHooks & HOOK_FLAGS);
 
    /* Assign the PDEV's palette */
    ppal = PALETTE_ShareLockPalette(ppdev->devinfo.hpalDefault);
    SURFACE_vSetPalette(psurf, ppal);
    PALETTE_ShareUnlockPalette(ppal);
 
    SURFACE_ShareUnlockSurface(psurf);
 
    return TRUE;
}

Referenced by DrvEnableSurface(), and PanEnableSurface().

EngCreateBitmap()

HBITMAP APIENTRY EngCreateBitmap	(	_In_ SIZEL	sizl,
		_In_ LONG	lWidth,
		_In_ ULONG	iFormat,
		_In_ ULONG	fl,
		_In_opt_ PVOID	pvBits
	)

Definition at line 306 of file surface.c.

{
    PSURFACE psurf;
    HBITMAP hbmp;
 
    /* Allocate a surface */
    psurf = SURFACE_AllocSurface(STYPE_BITMAP,
                                 sizl.cx,
                                 sizl.cy,
                                 iFormat,
                                 fl,
                                 lWidth,
                                 0,
                                 pvBits);
    if (!psurf)
    {
        DPRINT1("SURFACE_AllocSurface failed. (STYPE_BITMAP, sizl.cx=%ld, sizl.cy=%ld, iFormat=%lu, fl=%lu, lWidth=%ld, pvBits=0x%p)\n",
                sizl.cx, sizl.cy, iFormat, fl, lWidth, pvBits);
        return NULL;
    }
 
    /* Get the handle for the bitmap */
    hbmp = (HBITMAP)psurf->SurfObj.hsurf;
 
    /* Mark as API bitmap */
    psurf->flags = API_BITMAP;
 
    /* Set public ownership */
    GDIOBJ_vSetObjectOwner(&psurf->BaseObject, GDI_OBJ_HMGR_PUBLIC);
 
    /* Unlock the surface and return */
    SURFACE_UnlockSurface(psurf);
    return hbmp;
}

EngCreateDeviceBitmap()

HBITMAP APIENTRY EngCreateDeviceBitmap	(	_In_ DHSURF	dhsurf,
		_In_ SIZEL	sizl,
		_In_ ULONG	iFormat
	)

Definition at line 351 of file surface.c.

{
    PSURFACE psurf;
    HBITMAP hbmp;
 
    /* Allocate a surface */
    psurf = SURFACE_AllocSurface(STYPE_DEVBITMAP,
                                 sizl.cx,
                                 sizl.cy,
                                 iFormat,
                                 0,
                                 0,
                                 0,
                                 NULL);
    if (!psurf)
    {
        DPRINT1("SURFACE_AllocSurface failed. (STYPE_DEVBITMAP, sizl.cx=%ld, sizl.cy=%ld, iFormat=%lu)\n",
                sizl.cx, sizl.cy, iFormat);
        return NULL;
    }
 
    /* Set the device handle */
    psurf->SurfObj.dhsurf = dhsurf;
 
    /* Set public ownership */
    GDIOBJ_vSetObjectOwner(&psurf->BaseObject, GDI_OBJ_HMGR_PUBLIC);
 
    /* Get the handle for the bitmap */
    hbmp = (HBITMAP)psurf->SurfObj.hsurf;
 
    /* Unlock the surface and return */
    SURFACE_UnlockSurface(psurf);
    return hbmp;
}

EngCreateDeviceSurface()

HSURF APIENTRY EngCreateDeviceSurface	(	_In_ DHSURF	dhsurf,
		_In_ SIZEL	sizl,
		_In_ ULONG	iFormat
	)

Definition at line 391 of file surface.c.

{
    PSURFACE psurf;
    HSURF hsurf;
 
    /* Allocate a surface */
    psurf = SURFACE_AllocSurface(STYPE_DEVICE,
                                 sizl.cx,
                                 sizl.cy,
                                 iFormat,
                                 0,
                                 0,
                                 0,
                                 NULL);
    if (!psurf)
    {
        DPRINT1("SURFACE_AllocSurface failed. (STYPE_DEVICE, sizl.cx=%ld, sizl.cy=%ld, iFormat=%lu)\n",
                sizl.cx, sizl.cy, iFormat);
        return NULL;
    }
 
    /* Set the device handle */
    psurf->SurfObj.dhsurf = dhsurf;
 
    /* Set public ownership */
    GDIOBJ_vSetObjectOwner(&psurf->BaseObject, GDI_OBJ_HMGR_PUBLIC);
 
    /* Get the handle for the surface */
    hsurf = psurf->SurfObj.hsurf;
 
    /* Unlock the surface and return */
    SURFACE_UnlockSurface(psurf);
    return hsurf;
}

Referenced by DrvEnableSurface(), and PanEnableSurface().

EngDeleteSurface()

BOOL APIENTRY EngDeleteSurface

(

_In_ _Post_ptr_invalid_ HSURF

hsurf

)

Definition at line 567 of file surface.c.

{
    PSURFACE psurf;
 
    psurf = SURFACE_ShareLockSurface(hsurf);
    if (!psurf)
    {
        DPRINT1("Could not reference surface %p to delete\n", hsurf);
        return FALSE;
    }
 
    GDIOBJ_vDeleteObject(&psurf->BaseObject);
    return TRUE;
}

Referenced by DrvDisableSurface(), DrvEnableSurface(), DxEngDeleteSurface(), EBRUSHOBJ_pvGetEngBrush(), EngRealizeBrush(), EngSetPointerShape(), IntEngEnter(), IntEngLeave(), IntExtTextOutW(), NtGdiSetDIBitsToDeviceInternal(), and PanDisableSurface().

EngEraseSurface()

BOOL APIENTRY EngEraseSurface	(	_In_ SURFOBJ *	pso,
		_In_ RECTL *	prcl,
		_In_ ULONG	iColor
	)

Definition at line 585 of file surface.c.

{
    ASSERT(pso);
    ASSERT(prcl);
    return FillSolid(pso, prcl, iColor);
}

EngLockSurface()

SURFOBJ *APIENTRY EngLockSurface

(

_In_ HSURF

hsurf

)

Definition at line 607 of file surface.c.

{
    SURFACE *psurf = SURFACE_ShareLockSurface(hsurf);
 
    return psurf ? &psurf->SurfObj : NULL;
}

Referenced by DrvEnableSurface(), DxEngAltLockSurface(), IntEngEnter(), IntExtTextOutW(), IntGdiCreateMaskFromRLE(), NtGdiEngLockSurface(), NtGdiSetDIBitsToDeviceInternal(), and PanEnableSurface().

EngModifySurface()

BOOL APIENTRY EngModifySurface	(	_In_ HSURF	hsurf,
		_In_ HDEV	hdev,
		_In_ FLONG	flHooks,
		_In_ FLONG	flSurface,
		_In_ DHSURF	dhsurf,
		_In_ PVOID	pvScan0,
		_In_ LONG	lDelta,
		_Reserved_ PVOID	pvReserved
	)

Definition at line 471 of file surface.c.

{
    SURFOBJ *pso;
    PSURFACE psurf;
    PDEVOBJ* ppdev;
    PPALETTE ppal;
 
    /* Lock the surface */
    psurf = SURFACE_ShareLockSurface(hsurf);
    if (psurf == NULL)
    {
        DPRINT1("Failed to reference surface %p\n", hsurf);
        return FALSE;
    }
 
    ppdev = (PDEVOBJ*)hdev;
    pso = &psurf->SurfObj;
    pso->dhsurf = dhsurf;
 
    /* Associate the hdev */
    pso->hdev = hdev;
    pso->dhpdev = ppdev->dhpdev;
 
    /* Hook up specified functions */
    psurf->flags &= ~HOOK_FLAGS;
    psurf->flags |= (flHooks & HOOK_FLAGS);
 
    /* Assign the PDEV's palette */
    ppal = PALETTE_ShareLockPalette(ppdev->devinfo.hpalDefault);
    SURFACE_vSetPalette(psurf, ppal);
    PALETTE_ShareUnlockPalette(ppal);
 
    /* Update surface flags */
    if (flSurface & MS_NOTSYSTEMMEMORY)
         pso->fjBitmap |= BMF_NOTSYSMEM;
    else
        pso->fjBitmap &= ~BMF_NOTSYSMEM;
    if (flSurface & MS_SHAREDACCESS)
         psurf->flags |= SHAREACCESS_SURFACE;
    else
        psurf->flags &= ~SHAREACCESS_SURFACE;
 
    /* Check if the caller passed bitmap bits */
    if ((pvScan0 != NULL) && (lDelta != 0))
    {
        /* Update the fields */
        pso->pvScan0 = pvScan0;
        pso->lDelta = lDelta;
 
        /* This is a bitmap now! */
        pso->iType = STYPE_BITMAP;
 
        /* Check memory layout */
        if (lDelta > 0)
        {
            /* Topdown is the normal way */
            pso->cjBits = lDelta * pso->sizlBitmap.cy;
            pso->pvBits = pso->pvScan0;
            pso->fjBitmap |= BMF_TOPDOWN;
        }
        else
        {
            /* Inversed bitmap (bottom up) */
            pso->cjBits = (-lDelta) * pso->sizlBitmap.cy;
            pso->pvBits = (PCHAR)pso->pvScan0 - pso->cjBits - lDelta;
            pso->fjBitmap &= ~BMF_TOPDOWN;
        }
    }
    else
    {
        /* Set bits to NULL */
        pso->pvBits = NULL;
        pso->pvScan0 = NULL;
        pso->lDelta = 0;
 
        /* Set appropriate surface type */
        if (pso->iType != STYPE_DEVICE)
            pso->iType = STYPE_DEVBITMAP;
    }
 
    SURFACE_ShareUnlockSurface(psurf);
 
    return TRUE;
}

Referenced by DrvAssertMode(), and DrvEnableSurface().

EngUnlockSurface()

VOID APIENTRY EngUnlockSurface

(

_In_ _Post_ptr_invalid_ SURFOBJ *

pso

)

Definition at line 628 of file surface.c.

{
    if (pso != NULL)
    {
        SURFACE *psurf = CONTAINING_RECORD(pso, SURFACE, SurfObj);
        SURFACE_ShareUnlockSurface(psurf);
    }
}

Referenced by IntEngEnter(), IntEngLeave(), IntExtTextOutW(), IntGdiCreateMaskFromRLE(), NtGdiSetDIBitsToDeviceInternal(), PanDisableSurface(), and SynchronizeDriver().

NtGdiEngLockSurface()

SURFOBJ *APIENTRY NtGdiEngLockSurface

(

IN HSURF

hsurf

)

Definition at line 599 of file surface.c.

{
    return EngLockSurface(hsurf);
}

NtGdiEngUnlockSurface()

__kernel_entry NTSTATUS APIENTRY NtGdiEngUnlockSurface

(

_In_ SURFOBJ *

pso

)

Definition at line 618 of file surface.c.

{
    UNIMPLEMENTED;
    ASSERT(FALSE);
    return STATUS_NOT_IMPLEMENTED;
}

SURFACE_AllocSurface()

PSURFACE NTAPI SURFACE_AllocSurface	(	_In_ USHORT	iType,
		_In_ ULONG	cx,
		_In_ ULONG	cy,
		_In_ ULONG	iFormat,
		_In_ ULONG	fjBitmap,
		_In_opt_ ULONG	cjWidth,
		_In_opt_ ULONG	cjBufSize,
		_In_opt_ PVOID	pvBits
	)

Definition at line 116 of file surface.c.

{
    ULONG cBitsPixel, cjBits, cjObject;
    PSURFACE psurf;
    SURFOBJ *pso;
    PVOID pvSection;
 
    NT_ASSERT(!pvBits || (iType == STYPE_BITMAP));
    NT_ASSERT((iFormat <= BMF_32BPP) || (cjBufSize != 0));
    NT_ASSERT((LONG)cy > 0);
 
    /* Verify format */
    if ((iFormat < BMF_1BPP) || (iFormat > BMF_PNG))
    {
        DPRINT1("Invalid bitmap format: %lu\n", iFormat);
        return NULL;
    }
 
    /* Get bits per pixel from the format */
    cBitsPixel = gajBitsPerFormat[iFormat];
 
    /* Are bits and a width in bytes given? */
    if (pvBits && cjWidth)
    {
        /* Align the width (Windows compatibility, drivers expect that) */
        cjWidth = WIDTH_BYTES_ALIGN32((cjWidth << 3) / cBitsPixel, cBitsPixel);
    }
    else
    {
        /* Calculate width from the bitmap width in pixels */
        cjWidth = WIDTH_BYTES_ALIGN32(cx, cBitsPixel);
    }
 
    /* Is this an uncompressed format? */
    if (iFormat <= BMF_32BPP)
    {
        /* Calculate the correct bitmap size in bytes */
        if (!NT_SUCCESS(RtlULongMult(cjWidth, cy, &cjBits)))
        {
            DPRINT1("Overflow calculating size: cjWidth %lu, cy %lu\n",
                    cjWidth, cy);
            return NULL;
        }
 
        /* Did we get a buffer and size? */
        if ((pvBits != NULL) && (cjBufSize != 0))
        {
            /* Make sure the buffer is large enough */
            if (cjBufSize < cjBits)
            {
                DPRINT1("Buffer is too small, required: %lu, got %lu\n",
                        cjBits, cjBufSize);
                return NULL;
            }
        }
    }
    else
    {
        /* Compressed format, use the provided size */
        NT_ASSERT(cjBufSize != 0);
        cjBits = cjBufSize;
    }
 
    /* Check if we need an extra large object */
    if ((iType == STYPE_BITMAP) && (pvBits == NULL) &&
        !(fjBitmap & BMF_USERMEM) && !(fjBitmap & BMF_KMSECTION))
    {
        /* Allocate an object large enough to hold the bits */
        cjObject = sizeof(SURFACE) + cjBits;
    }
    else
    {
        /* Otherwise just allocate the SURFACE structure */
        cjObject = sizeof(SURFACE);
    }
 
    /* Check for arithmetic overflow */
    if (cjObject < sizeof(SURFACE))
    {
        /* Fail! */
        DPRINT1("Overflow calculating cjObject: cjBits %lu\n", cjBits);
        return NULL;
    }
 
    /* Allocate a SURFACE object */
    psurf = (PSURFACE)GDIOBJ_AllocObjWithHandle(GDI_OBJECT_TYPE_BITMAP, cjObject);
    if (!psurf)
    {
        return NULL;
    }
 
    /* Initialize the basic fields */
    pso = &psurf->SurfObj;
    pso->hsurf = psurf->BaseObject.hHmgr;
    pso->sizlBitmap.cx = cx;
    pso->sizlBitmap.cy = cy;
    pso->iBitmapFormat = iFormat;
    pso->iType = iType;
    pso->fjBitmap = (USHORT)fjBitmap;
    pso->iUniq = InterlockedIncrement(&giUniqueSurface);
    pso->cjBits = cjBits;
 
    /* Check if we need a bitmap buffer */
    if (iType == STYPE_BITMAP)
    {
        /* Check if we got one or if we need to allocate one */
        if (pvBits != NULL)
        {
            /* Use the caller provided buffer */
            pso->pvBits = pvBits;
        }
        else if (fjBitmap & BMF_USERMEM)
        {
            /* User mode memory was requested */
            pso->pvBits = EngAllocUserMem(cjBits, 0);
 
            /* Check for failure */
            if (!pso->pvBits)
            {
                GDIOBJ_vDeleteObject(&psurf->BaseObject);
                return NULL;
            }
        }
        else if (fjBitmap & BMF_KMSECTION)
        {
            /* Use a kernel mode section */
            pso->pvBits = EngAllocSectionMem(&pvSection,
                                             (fjBitmap & BMF_NOZEROINIT) ?
                                                 0 : FL_ZERO_MEMORY,
                                             cjBits, TAG_DIB);
 
            /* Check for failure */
            if (!pso->pvBits)
            {
                GDIOBJ_vDeleteObject(&psurf->BaseObject);
                return NULL;
            }
 
            /* Free the section already, but keep the mapping */
            EngFreeSectionMem(pvSection, NULL);
        }
        else
        {
            /* Buffer is after the object */
            pso->pvBits = psurf + 1;
 
            /* Zero the buffer, except requested otherwise */
            if (!(fjBitmap & BMF_NOZEROINIT))
            {
                RtlZeroMemory(pso->pvBits, cjBits);
            }
        }
 
        /* Set pvScan0 and lDelta */
        if (fjBitmap & BMF_TOPDOWN)
        {
            /* Topdown is the normal way */
            pso->pvScan0 = pso->pvBits;
            pso->lDelta = cjWidth;
        }
        else
        {
            /* Inversed bitmap (bottom up) */
            pso->pvScan0 = ((PCHAR)pso->pvBits + pso->cjBits - cjWidth);
            pso->lDelta = -(LONG)cjWidth;
        }
    }
    else
    {
        /* There are no bitmap bits */
        pso->pvScan0 = pso->pvBits = NULL;
        pso->lDelta = 0;
    }
 
    /* Assign a default palette and increment its reference count */
    SURFACE_vSetPalette(psurf, appalSurfaceDefault[iFormat]);
 
    return psurf;
}

Referenced by EngCreateBitmap(), EngCreateDeviceBitmap(), EngCreateDeviceSurface(), GreCreateBitmapEx(), IntEngMaskBlt(), NtGdiCreateBitmap(), NtGdiDdDDICreateDCFromMemory(), NtGdiGetPixel(), and UserDrawIconEx().

SURFACE_vCleanup()

VOID NTAPI SURFACE_vCleanup

(

PVOID

ObjectBody

)

Definition at line 67 of file surface.c.

{
    PSURFACE psurf = (PSURFACE)ObjectBody;
    PVOID pvBits = psurf->SurfObj.pvBits;
 
    /* Check if the surface has bits */
    if (pvBits)
    {
        /* Only bitmaps can have bits */
        ASSERT(psurf->SurfObj.iType == STYPE_BITMAP);
 
        /* Check if it is a DIB section */
        if (psurf->hDIBSection)
        {
            /* Unmap the section view */
            EngUnmapSectionView(pvBits, psurf->dwOffset, psurf->hSecure);
        }
        else if (psurf->SurfObj.fjBitmap & BMF_USERMEM)
        {
            /* Bitmap was allocated from usermode memory */
            EngFreeUserMem(pvBits);
        }
        else if (psurf->SurfObj.fjBitmap & BMF_KMSECTION)
        {
            /* Bitmap was allocated from a kernel section */
            if (!EngFreeSectionMem(NULL, pvBits))
            {
                DPRINT1("EngFreeSectionMem failed for %p!\n", pvBits);
                // Should we BugCheck here?
                ASSERT(FALSE);
            }
        }
        else if (psurf->SurfObj.fjBitmap & BMF_POOLALLOC)
        {
            /* Free a pool allocation */
            EngFreeMem(pvBits);
        }
    }
 
    /* Free palette */
    if(psurf->ppal)
    {
        PALETTE_ShareUnlockPalette(psurf->ppal);
    }
}

Variable Documentation

gajBitsPerFormat

UCHAR gajBitsPerFormat[11]

Initial value:

=
{
    0, 
    1, 
    4, 
    8, 
   16, 
   24, 
   32, 
    4, 
    8, 
    0, 
    0, 
}

Definition at line 21 of file surface.c.

Referenced by DC_bIsBitmapCompatible(), EngBitBlt(), GreCreateBitmapEx(), NtGdiCreateBitmap(), NtGdiMaskBlt(), and SURFACE_AllocSurface().

giUniqueSurface

LONG giUniqueSurface = 0

Definition at line 18 of file surface.c.

Referenced by SURFACE_AllocSurface().