dibobj.c

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/*
 * PROJECT:         ReactOS win32 kernel mode subsystem
 * LICENSE:         GPL - See COPYING in the top level directory
 * FILE:            win32ss/gdi/ntgdi/dibobj.c
 * PURPOSE:         Dib object functions
 * PROGRAMMER:
 */

#include <win32k.h>

#define NDEBUG
#include <debug.h>

static const RGBQUAD DefLogPaletteQuads[20] =   /* Copy of Default Logical Palette */
{
    /* rgbBlue, rgbGreen, rgbRed, rgbReserved */
    { 0x00, 0x00, 0x00, 0x00 },
    { 0x00, 0x00, 0x80, 0x00 },
    { 0x00, 0x80, 0x00, 0x00 },
    { 0x00, 0x80, 0x80, 0x00 },
    { 0x80, 0x00, 0x00, 0x00 },
    { 0x80, 0x00, 0x80, 0x00 },
    { 0x80, 0x80, 0x00, 0x00 },
    { 0xc0, 0xc0, 0xc0, 0x00 },
    { 0xc0, 0xdc, 0xc0, 0x00 },
    { 0xf0, 0xca, 0xa6, 0x00 },
    { 0xf0, 0xfb, 0xff, 0x00 },
    { 0xa4, 0xa0, 0xa0, 0x00 },
    { 0x80, 0x80, 0x80, 0x00 },
    { 0x00, 0x00, 0xff, 0x00 },
    { 0x00, 0xff, 0x00, 0x00 },
    { 0x00, 0xff, 0xff, 0x00 },
    { 0xff, 0x00, 0x00, 0x00 },
    { 0xff, 0x00, 0xff, 0x00 },
    { 0xff, 0xff, 0x00, 0x00 },
    { 0xff, 0xff, 0xff, 0x00 }
};

PPALETTE
NTAPI
CreateDIBPalette(
    _In_ const BITMAPINFO *pbmi,
    _In_ PDC pdc,
    _In_ ULONG iUsage)
{
    PPALETTE ppal;
    ULONG i, cBitsPixel, cColors;

    if (pbmi->bmiHeader.biSize < sizeof(BITMAPINFOHEADER))
    {
        PBITMAPCOREINFO pbci = (PBITMAPCOREINFO)pbmi;
        cBitsPixel = pbci->bmciHeader.bcBitCount;
    }
    else
    {
        cBitsPixel = pbmi->bmiHeader.biBitCount;
    }

    /* Check if the colors are indexed */
    if (cBitsPixel <= 8)
    {
        /* We create a "full" palette */
        cColors = 1 << cBitsPixel;

        /* Allocate the palette */
        ppal = PALETTE_AllocPalette(PAL_INDEXED,
                                    cColors,
                                    NULL,
                                    0,
                                    0,
                                    0);

        /* Check if the BITMAPINFO specifies how many colors to use */
        if ((pbmi->bmiHeader.biSize >= sizeof(BITMAPINFOHEADER)) &&
            (pbmi->bmiHeader.biClrUsed != 0))
        {
            /* This is how many colors we can actually process */
            cColors = min(cColors, pbmi->bmiHeader.biClrUsed);
        }

        /* Check how to use the colors */
        if (iUsage == DIB_PAL_COLORS)
        {
            COLORREF crColor;

            /* The colors are an array of WORD indices into the DC palette */
            PWORD pwColors = (PWORD)((PCHAR)pbmi + pbmi->bmiHeader.biSize);

            /* Use the DCs palette or, if no DC is given, the default one */
            PPALETTE ppalDC = pdc ? pdc->dclevel.ppal : gppalDefault;

            /* Loop all color indices in the DIB */
            for (i = 0; i < cColors; i++)
            {
                /* Get the palette index and handle wraparound when exceeding
                   the number of colors in the DC palette */
                WORD wIndex = pwColors[i] % ppalDC->NumColors;

                /* USe the RGB value from the DC palette */
                crColor = PALETTE_ulGetRGBColorFromIndex(ppalDC, wIndex);
                PALETTE_vSetRGBColorForIndex(ppal, i, crColor);
            }
        }
        else if (iUsage == DIB_PAL_BRUSHHACK)
        {
            /* The colors are an array of WORD indices into the DC palette */
            PWORD pwColors = (PWORD)((PCHAR)pbmi + pbmi->bmiHeader.biSize);

            /* Loop all color indices in the DIB */
            for (i = 0; i < cColors; i++)
            {
                /* Set the index directly as the RGB color, the real palette
                   containing RGB values will be calculated when the brush is
                   realized */
                PALETTE_vSetRGBColorForIndex(ppal, i, pwColors[i]);
            }

            /* Mark the palette as a brush hack palette */
            ppal->flFlags |= PAL_BRUSHHACK;
        }
//        else if (iUsage == 2)
//        {
            // FIXME: this one is undocumented
//            ASSERT(FALSE);
//        }
        else if (pbmi->bmiHeader.biSize >= sizeof(BITMAPINFOHEADER))
        {
            /* The colors are an array of RGBQUAD values */
            RGBQUAD *prgb = (RGBQUAD*)((PCHAR)pbmi + pbmi->bmiHeader.biSize);

            // FIXME: do we need to handle PALETTEINDEX / PALETTERGB macro?

            /* Loop all color indices in the DIB */
            for (i = 0; i < cColors; i++)
            {
                /* Get the color value and translate it to a COLORREF */
                RGBQUAD rgb = prgb[i];
                COLORREF crColor = RGB(rgb.rgbRed, rgb.rgbGreen, rgb.rgbBlue);

                /* Set the RGB value in the palette */
                PALETTE_vSetRGBColorForIndex(ppal, i, crColor);
            }
        }
        else
        {
            /* The colors are an array of RGBTRIPLE values */
            RGBTRIPLE *prgb = (RGBTRIPLE*)((PCHAR)pbmi + pbmi->bmiHeader.biSize);

            /* Loop all color indices in the DIB */
            for (i = 0; i < cColors; i++)
            {
                /* Get the color value and translate it to a COLORREF */
                RGBTRIPLE rgb = prgb[i];
                COLORREF crColor = RGB(rgb.rgbtRed, rgb.rgbtGreen, rgb.rgbtBlue);

                /* Set the RGB value in the palette */
                PALETTE_vSetRGBColorForIndex(ppal, i, crColor);
            }
        }
    }
    else
    {
        /* This is a bitfield / RGB palette */
        ULONG flRedMask, flGreenMask, flBlueMask;

        /* Check if the DIB contains bitfield values */
        if ((pbmi->bmiHeader.biSize >= sizeof(BITMAPINFOHEADER)) &&
            (pbmi->bmiHeader.biCompression == BI_BITFIELDS))
        {
            /* Check if we have a v4/v5 header */
            if (pbmi->bmiHeader.biSize >= sizeof(BITMAPV4HEADER))
            {
                /* The masks are dedicated fields in the header */
                PBITMAPV4HEADER pbmV4Header = (PBITMAPV4HEADER)&pbmi->bmiHeader;
                flRedMask = pbmV4Header->bV4RedMask;
                flGreenMask = pbmV4Header->bV4GreenMask;
                flBlueMask = pbmV4Header->bV4BlueMask;
            }
            else
            {
                /* The masks are the first 3 values in the DIB color table */
                PDWORD pdwColors = (PVOID)((PCHAR)pbmi + pbmi->bmiHeader.biSize);
                flRedMask = pdwColors[0];
                flGreenMask = pdwColors[1];
                flBlueMask = pdwColors[2];
            }
        }
        else
        {
            /* Check what bit depth we have. Note: optimization flags are
               calculated in PALETTE_AllocPalette()  */
            if (cBitsPixel == 16)
            {
                /* This is an RGB 555 palette */
                flRedMask = 0x7C00;
                flGreenMask = 0x03E0;
                flBlueMask = 0x001F;
            }
            else
            {
                /* This is an RGB 888 palette */
                flRedMask = 0xFF0000;
                flGreenMask = 0x00FF00;
                flBlueMask = 0x0000FF;
            }
        }

        /* Allocate the bitfield palette */
        ppal = PALETTE_AllocPalette(PAL_BITFIELDS,
                                    0,
                                    NULL,
                                    flRedMask,
                                    flGreenMask,
                                    flBlueMask);
    }

    /* We're done, return the palette */
    return ppal;
}

// Converts a DIB to a device-dependent bitmap
static INT
FASTCALL
IntSetDIBits(
    PDC   DC,
    HBITMAP  hBitmap,
    UINT  StartScan,
    UINT  ScanLines,
    CONST VOID  *Bits,
    ULONG cjMaxBits,
    CONST BITMAPINFO  *bmi,
    UINT  ColorUse)
{
    HBITMAP     SourceBitmap;
    PSURFACE    psurfDst, psurfSrc;
    INT         result = 0;
    RECT        rcDst;
    POINTL      ptSrc;
    EXLATEOBJ   exlo;
    PPALETTE    ppalDIB = 0;
    ULONG cjSizeImage;

    if (!bmi || !Bits) return 0;

    /* Check for uncompressed formats */
    if ((bmi->bmiHeader.biCompression == BI_RGB) ||
             (bmi->bmiHeader.biCompression == BI_BITFIELDS))
    {
        /* Calculate the image size */
        cjSizeImage = DIB_GetDIBImageBytes(bmi->bmiHeader.biWidth,
                                           ScanLines,
                                           bmi->bmiHeader.biBitCount);
    }
    /* Check if the header provided an image size */
    else if (bmi->bmiHeader.biSizeImage != 0)
    {
        /* Use the given size */
        cjSizeImage = bmi->bmiHeader.biSizeImage;
    }
    else
    {
        /* Compressed format without a size. This is invalid. */
        DPRINT1("Compressed format without a size!");
        return 0;
    }

    /* Check if the size that we have is ok */
    if ((cjSizeImage > cjMaxBits) || (cjSizeImage == 0))
    {
        DPRINT1("Invalid bitmap size! cjSizeImage = %lu, cjMaxBits = %lu\n",
                cjSizeImage, cjMaxBits);
        return 0;
    }

    SourceBitmap = GreCreateBitmapEx(bmi->bmiHeader.biWidth,
                                     ScanLines,
                                     0,
                                     BitmapFormat(bmi->bmiHeader.biBitCount,
                                                  bmi->bmiHeader.biCompression),
                                     bmi->bmiHeader.biHeight < 0 ? BMF_TOPDOWN : 0,
                                     cjSizeImage,
                                     (PVOID)Bits,
                                     0);
    if (!SourceBitmap)
    {
        DPRINT1("Error: Could not create a bitmap.\n");
        EngSetLastError(ERROR_NO_SYSTEM_RESOURCES);
        return 0;
    }

    psurfDst = SURFACE_ShareLockSurface(hBitmap);
    psurfSrc = SURFACE_ShareLockSurface(SourceBitmap);

    if(!(psurfSrc && psurfDst))
    {
        DPRINT1("Error: Could not lock surfaces\n");
        goto cleanup;
    }

    /* Create a palette for the DIB */
    ppalDIB = CreateDIBPalette(bmi, DC, ColorUse);
    if (!ppalDIB)
    {
        EngSetLastError(ERROR_NO_SYSTEM_RESOURCES);
        goto cleanup;
    }

    /* Initialize EXLATEOBJ */
    EXLATEOBJ_vInitialize(&exlo,
                          ppalDIB,
                          psurfDst->ppal,
                          RGB(0xff, 0xff, 0xff),
                          RGB(0xff, 0xff, 0xff), //DC->pdcattr->crBackgroundClr,
                          0); // DC->pdcattr->crForegroundClr);

    rcDst.top = StartScan;
    rcDst.left = 0;
    rcDst.bottom = rcDst.top + ScanLines;
    rcDst.right = psurfDst->SurfObj.sizlBitmap.cx;
    ptSrc.x = 0;
    ptSrc.y = 0;

    result = IntEngCopyBits(&psurfDst->SurfObj,
                            &psurfSrc->SurfObj,
                            NULL,
                            &exlo.xlo,
                            &rcDst,
                            &ptSrc);
    if(result)
        result = ScanLines;

    EXLATEOBJ_vCleanup(&exlo);

cleanup:
    if (ppalDIB) PALETTE_ShareUnlockPalette(ppalDIB);
    if(psurfSrc) SURFACE_ShareUnlockSurface(psurfSrc);
    if(psurfDst) SURFACE_ShareUnlockSurface(psurfDst);
    GreDeleteObject(SourceBitmap);

    return result;
}

static
HBITMAP
IntGdiCreateMaskFromRLE(
    DWORD Width,
    DWORD Height,
    ULONG Compression,
    const BYTE* Bits,
    DWORD BitsSize)
{
    HBITMAP Mask;
    DWORD x, y;
    SURFOBJ* SurfObj;
    UINT i = 0;
    BYTE Data, NumPixels, ToSkip;

    ASSERT((Compression == BI_RLE8) || (Compression == BI_RLE4));

    /* Create the bitmap */
    Mask = GreCreateBitmapEx(Width, Height, 0, BMF_1BPP, 0, 0, NULL, 0);
    if (!Mask)
        return NULL;

    SurfObj = EngLockSurface((HSURF)Mask);
    if (!SurfObj)
    {
        GreDeleteObject(Mask);
        return NULL;
    }
    ASSERT(SurfObj->pvBits != NULL);

    x = y = 0;

    while (i < BitsSize)
    {
        NumPixels = Bits[i];
        Data = Bits[i + 1];
        i += 2;

        if (NumPixels != 0)
        {
            if ((x + NumPixels) > Width)
                NumPixels = Width - x;

            if (NumPixels == 0)
                continue;

            DIB_1BPP_HLine(SurfObj, x, x + NumPixels, y, 1);
            x += NumPixels;
            continue;
        }

        if (Data < 3)
        {
            switch (Data)
            {
                case 0:
                    /* End of line */
                    y++;
                    if (y == Height)
                        goto done;
                    x = 0;
                    break;
                case 1:
                    /* End of file */
                    goto done;
                case 2:
                    /* Jump */
                    if (i >= (BitsSize - 1))
                        goto done;
                    x += Bits[i];
                    if (x > Width)
                        x = Width;
                    y += Bits[i + 1];
                    if (y >= Height)
                        goto done;
                    i += 2;
                    break;
            }
            /* Done for this run */
            continue;
        }

        /* Embedded data into the RLE */
        NumPixels = Data;
        if (Compression == BI_RLE8)
            ToSkip = NumPixels;
        else
            ToSkip = (NumPixels / 2) + (NumPixels & 1);

        if ((i + ToSkip) > BitsSize)
            goto done;
        ToSkip = (ToSkip + 1) & ~1;

        if ((x + NumPixels) > Width)
            NumPixels = Width - x;

        if (NumPixels != 0)
        {
            DIB_1BPP_HLine(SurfObj, x, x + NumPixels, y, 1);
            x += NumPixels;
        }
        i += ToSkip;
    }

done:
    EngUnlockSurface(SurfObj);
    return Mask;
}

W32KAPI
INT
APIENTRY
NtGdiSetDIBitsToDeviceInternal(
    IN HDC hDC,
    IN INT XDest,
    IN INT YDest,
    IN DWORD Width,
    IN DWORD Height,
    IN INT XSrc,
    IN INT YSrc,
    IN DWORD StartScan,
    IN DWORD ScanLines,
    IN LPBYTE Bits,
    IN LPBITMAPINFO bmi,
    IN DWORD ColorUse,
    IN UINT cjMaxBits,
    IN UINT cjMaxInfo,
    IN BOOL bTransformCoordinates,
    IN OPTIONAL HANDLE hcmXform)
{
    INT ret;
    PDC pDC = NULL;
    HBITMAP hSourceBitmap = NULL, hMaskBitmap = NULL;
    SURFOBJ *pDestSurf, *pSourceSurf = NULL, *pMaskSurf = NULL;
    SURFACE *pSurf;
    RECTL rcDest;
    POINTL ptSource;
    //INT DIBWidth;
    SIZEL SourceSize;
    EXLATEOBJ exlo;
    PPALETTE ppalDIB = NULL;
    LPBITMAPINFO pbmiSafe;
    BOOL bResult;

    if (!Bits) return 0;

    pbmiSafe = ExAllocatePoolWithTag(PagedPool, cjMaxInfo, 'pmTG');
    if (!pbmiSafe) return 0;

    _SEH2_TRY
    {
        ProbeForRead(bmi, cjMaxInfo, 1);
        ProbeForRead(Bits, cjMaxBits, 1);
        RtlCopyMemory(pbmiSafe, bmi, cjMaxInfo);
        bmi = pbmiSafe;
    }
    _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
    {
        ret = 0;
        goto Exit;
    }
    _SEH2_END

    ScanLines = min(ScanLines, abs(bmi->bmiHeader.biHeight) - StartScan);
    if (ScanLines == 0)
    {
        DPRINT1("ScanLines == 0\n");
        ret = 0;
        goto Exit;
    }

    pDC = DC_LockDc(hDC);
    if (!pDC)
    {
        EngSetLastError(ERROR_INVALID_HANDLE);
        ret = 0;
        goto Exit;
    }

    if (pDC->dctype == DC_TYPE_INFO)
    {
        ret = 0;
        goto Exit;
    }

    rcDest.left = XDest;
    rcDest.top = YDest;
    if (bTransformCoordinates)
    {
        IntLPtoDP(pDC, (LPPOINT)&rcDest, 2);
    }
    rcDest.left += pDC->ptlDCOrig.x;
    rcDest.top += pDC->ptlDCOrig.y;
    rcDest.right = rcDest.left + Width;
    rcDest.bottom = rcDest.top + Height;
    rcDest.top += StartScan;

    if (pDC->fs & (DC_ACCUM_APP|DC_ACCUM_WMGR))
    {
       IntUpdateBoundsRect(pDC, &rcDest);
    }

    ptSource.x = XSrc;
    ptSource.y = YSrc;

    SourceSize.cx = bmi->bmiHeader.biWidth;
    SourceSize.cy = ScanLines;

    //DIBWidth = WIDTH_BYTES_ALIGN32(SourceSize.cx, bmi->bmiHeader.biBitCount);

    hSourceBitmap = GreCreateBitmapEx(bmi->bmiHeader.biWidth,
                                      ScanLines,
                                      0,
                                      BitmapFormat(bmi->bmiHeader.biBitCount,
                                                   bmi->bmiHeader.biCompression),
                                      bmi->bmiHeader.biHeight < 0 ? BMF_TOPDOWN : 0,
                                      bmi->bmiHeader.biSizeImage,
                                      Bits,
                                      0);

    if (!hSourceBitmap)
    {
        EngSetLastError(ERROR_NO_SYSTEM_RESOURCES);
        ret = 0;
        goto Exit;
    }

    pSourceSurf = EngLockSurface((HSURF)hSourceBitmap);
    if (!pSourceSurf)
    {
        ret = 0;
        goto Exit;
    }

    /* HACK: If this is a RLE bitmap, only the relevant pixels must be set. */
    if ((bmi->bmiHeader.biCompression == BI_RLE8) || (bmi->bmiHeader.biCompression == BI_RLE4))
    {
        hMaskBitmap = IntGdiCreateMaskFromRLE(bmi->bmiHeader.biWidth,
            ScanLines,
            bmi->bmiHeader.biCompression,
            Bits,
            cjMaxBits);
        if (!hMaskBitmap)
        {
            EngSetLastError(ERROR_NO_SYSTEM_RESOURCES);
            ret = 0;
            goto Exit;
        }
        pMaskSurf = EngLockSurface((HSURF)hMaskBitmap);
        if (!pMaskSurf)
        {
            ret = 0;
            goto Exit;
        }
    }

    /* Create a palette for the DIB */
    ppalDIB = CreateDIBPalette(bmi, pDC, ColorUse);
    if (!ppalDIB)
    {
        EngSetLastError(ERROR_NO_SYSTEM_RESOURCES);
        ret = 0;
        goto Exit;
    }

    /* This is actually a blit */
    DC_vPrepareDCsForBlit(pDC, &rcDest, NULL, NULL);
    pSurf = pDC->dclevel.pSurface;
    if (!pSurf)
    {
        DC_vFinishBlit(pDC, NULL);
        ret = ScanLines;
        goto Exit;
    }

    ASSERT(pSurf->ppal);

    /* Initialize EXLATEOBJ */
    EXLATEOBJ_vInitialize(&exlo,
                          ppalDIB,
                          pSurf->ppal,
                          RGB(0xff, 0xff, 0xff),
                          pDC->pdcattr->crBackgroundClr,
                          pDC->pdcattr->crForegroundClr);

    pDestSurf = &pSurf->SurfObj;

    /* Copy the bits */
    DPRINT("BitsToDev with rcDest=(%d|%d) (%d|%d), ptSource=(%d|%d) w=%d h=%d\n",
           rcDest.left, rcDest.top, rcDest.right, rcDest.bottom,
           ptSource.x, ptSource.y, SourceSize.cx, SourceSize.cy);

    /* This fixes the large Google text on Google.com from being upside down */
    if (rcDest.top > rcDest.bottom)
    {
        RECTL_vMakeWellOrdered(&rcDest);
        ptSource.y -= SourceSize.cy;
    }

    bResult = IntEngBitBlt(pDestSurf,
                          pSourceSurf,
                          pMaskSurf,
                          (CLIPOBJ *)&pDC->co,
                          &exlo.xlo,
                          &rcDest,
                          &ptSource,
                          pMaskSurf ? &ptSource : NULL,
                          NULL,
                          NULL,
                          pMaskSurf ? ROP4_MASK : ROP4_FROM_INDEX(R3_OPINDEX_SRCCOPY));

    /* Cleanup EXLATEOBJ */
    EXLATEOBJ_vCleanup(&exlo);

    /* We're done */
    DC_vFinishBlit(pDC, NULL);

    ret = bResult ? ScanLines : 0;

Exit:

    if (ppalDIB) PALETTE_ShareUnlockPalette(ppalDIB);
    if (pSourceSurf) EngUnlockSurface(pSourceSurf);
    if (hSourceBitmap) EngDeleteSurface((HSURF)hSourceBitmap);
    if (pMaskSurf) EngUnlockSurface(pMaskSurf);
    if (hMaskBitmap) EngDeleteSurface((HSURF)hMaskBitmap);
    if (pDC) DC_UnlockDc(pDC);
    ExFreePoolWithTag(pbmiSafe, 'pmTG');

    return ret;
}


/* Converts a device-dependent bitmap to a DIB */
INT
APIENTRY
GreGetDIBitsInternal(
    HDC hDC,
    HBITMAP hBitmap,
    UINT StartScan,
    UINT ScanLines,
    LPBYTE Bits,
    LPBITMAPINFO Info,
    UINT Usage,
    UINT MaxBits,
    UINT MaxInfo)
{
    BITMAPCOREINFO* pbmci = NULL;
    PSURFACE psurf = NULL;
    PDC pDC;
    LONG width, height;
    WORD planes, bpp;
    DWORD compr, size ;
    USHORT i;
    int bitmap_type;
    RGBQUAD* rgbQuads;
    VOID* colorPtr;

    DPRINT("Entered GreGetDIBitsInternal()\n");

    if ((Usage && Usage != DIB_PAL_COLORS) || !Info || !hBitmap)
        return 0;

    pDC = DC_LockDc(hDC);
    if (pDC == NULL || pDC->dctype == DC_TYPE_INFO)
    {
        ScanLines = 0;
        goto done;
    }

    /* Get a pointer to the source bitmap object */
    psurf = SURFACE_ShareLockSurface(hBitmap);
    if (psurf == NULL)
    {
        ScanLines = 0;
        goto done;
    }

    colorPtr = (LPBYTE)Info + Info->bmiHeader.biSize;
    rgbQuads = colorPtr;

    bitmap_type = DIB_GetBitmapInfo(&Info->bmiHeader,
                                    &width,
                                    &height,
                                    &planes,
                                    &bpp,
                                    &compr,
                                    &size);
    if(bitmap_type == -1)
    {
        DPRINT1("Wrong bitmap format\n");
        EngSetLastError(ERROR_INVALID_PARAMETER);
        ScanLines = 0;
        goto done;
    }
    else if(bitmap_type == 0)
    {
        /* We need a BITMAPINFO to create a DIB, but we have to fill
         * the BITMAPCOREINFO we're provided */
        pbmci = (BITMAPCOREINFO*)Info;
        /* fill in the the bit count, so we can calculate the right ColorsSize during the conversion */
        pbmci->bmciHeader.bcBitCount = BitsPerFormat(psurf->SurfObj.iBitmapFormat);
        Info = DIB_ConvertBitmapInfo((BITMAPINFO*)pbmci, Usage);
        if(Info == NULL)
        {
            DPRINT1("Error, could not convert the BITMAPCOREINFO!\n");
            ScanLines = 0;
            goto done;
        }
        rgbQuads = Info->bmiColors;
    }

    /* Validate input:
       - negative width is always an invalid value
       - non-null Bits and zero bpp is an invalid combination
       - only check the rest of the input params if either bpp is non-zero or Bits are set */
    if (width < 0 || (bpp == 0 && Bits))
    {
        ScanLines = 0;
        goto done;
    }

    if (Bits || bpp)
    {
        if ((height == 0 || width == 0) || (compr && compr != BI_BITFIELDS && compr != BI_RGB))
        {
            ScanLines = 0;
            goto done;
        }
    }

    Info->bmiHeader.biClrUsed = 0;
    Info->bmiHeader.biClrImportant = 0;

    /* Fill in the structure */
    switch(bpp)
    {
    case 0: /* Only info */
        Info->bmiHeader.biWidth = psurf->SurfObj.sizlBitmap.cx;
        Info->bmiHeader.biHeight = (psurf->SurfObj.fjBitmap & BMF_TOPDOWN) ?
                                   -psurf->SurfObj.sizlBitmap.cy :
                                   psurf->SurfObj.sizlBitmap.cy;
        Info->bmiHeader.biPlanes = 1;
        Info->bmiHeader.biBitCount = BitsPerFormat(psurf->SurfObj.iBitmapFormat);
        Info->bmiHeader.biSizeImage = DIB_GetDIBImageBytes( Info->bmiHeader.biWidth,
                                      Info->bmiHeader.biHeight,
                                      Info->bmiHeader.biBitCount);
        Info->bmiHeader.biCompression = (Info->bmiHeader.biBitCount == 16 || Info->bmiHeader.biBitCount == 32) ? 
                                        BI_BITFIELDS : BI_RGB;
        Info->bmiHeader.biXPelsPerMeter = 0;
        Info->bmiHeader.biYPelsPerMeter = 0;

        if (Info->bmiHeader.biBitCount <= 8 && Info->bmiHeader.biClrUsed == 0)
            Info->bmiHeader.biClrUsed = 1 << Info->bmiHeader.biBitCount;

        ScanLines = 1;
        goto done;

    case 1:
    case 4:
    case 8:
        Info->bmiHeader.biClrUsed = 1 << bpp;

        /* If the bitmap is a DIB section and has the same format as what
         * is requested, go ahead! */
        if((psurf->hSecure) &&
                (BitsPerFormat(psurf->SurfObj.iBitmapFormat) == bpp))
        {
            if(Usage == DIB_RGB_COLORS)
            {
                ULONG colors = min(psurf->ppal->NumColors, 256);
                if(colors != 256) Info->bmiHeader.biClrUsed = colors;
                for(i = 0; i < colors; i++)
                {
                    rgbQuads[i].rgbRed = psurf->ppal->IndexedColors[i].peRed;
                    rgbQuads[i].rgbGreen = psurf->ppal->IndexedColors[i].peGreen;
                    rgbQuads[i].rgbBlue = psurf->ppal->IndexedColors[i].peBlue;
                    rgbQuads[i].rgbReserved = 0;
                }
            }
            else
            {
                for(i = 0; i < 256; i++)
                    ((WORD*)rgbQuads)[i] = i;
            }
        }
        else
        {
            if(Usage == DIB_PAL_COLORS)
            {
                for(i = 0; i < 256; i++)
                {
                    ((WORD*)rgbQuads)[i] = i;
                }
            }
            else if(bpp > 1 && bpp == BitsPerFormat(psurf->SurfObj.iBitmapFormat))
            {
                /* For color DDBs in native depth (mono DDBs always have
                   a black/white palette):
                   Generate the color map from the selected palette */
                PPALETTE pDcPal = PALETTE_ShareLockPalette(pDC->dclevel.hpal);
                if(!pDcPal)
                {
                    ScanLines = 0 ;
                    goto done ;
                }
                for (i = 0; i < pDcPal->NumColors; i++)
                {
                    rgbQuads[i].rgbRed      = pDcPal->IndexedColors[i].peRed;
                    rgbQuads[i].rgbGreen    = pDcPal->IndexedColors[i].peGreen;
                    rgbQuads[i].rgbBlue     = pDcPal->IndexedColors[i].peBlue;
                    rgbQuads[i].rgbReserved = 0;
                }
                PALETTE_ShareUnlockPalette(pDcPal);
            }
            else
            {
                switch (bpp)
                {
                case 1:
                    rgbQuads[0].rgbRed = rgbQuads[0].rgbGreen = rgbQuads[0].rgbBlue = 0;
                    rgbQuads[0].rgbReserved = 0;
                    rgbQuads[1].rgbRed = rgbQuads[1].rgbGreen = rgbQuads[1].rgbBlue = 0xff;
                    rgbQuads[1].rgbReserved = 0;
                    break;

                case 4:
                    /* The EGA palette is the first and last 8 colours of the default palette
                       with the innermost pair swapped */
                    RtlCopyMemory(rgbQuads,     DefLogPaletteQuads,      7 * sizeof(RGBQUAD));
                    RtlCopyMemory(rgbQuads + 7, DefLogPaletteQuads + 12, 1 * sizeof(RGBQUAD));
                    RtlCopyMemory(rgbQuads + 8, DefLogPaletteQuads +  7, 1 * sizeof(RGBQUAD));
                    RtlCopyMemory(rgbQuads + 9, DefLogPaletteQuads + 13, 7 * sizeof(RGBQUAD));
                    break;

                case 8:
                {
                    INT i;

                    memcpy(rgbQuads, DefLogPaletteQuads, 10 * sizeof(RGBQUAD));
                    memcpy(rgbQuads + 246, DefLogPaletteQuads + 10, 10 * sizeof(RGBQUAD));

                    for (i = 10; i < 246; i++)
                    {
                        rgbQuads[i].rgbRed = (i & 0x07) << 5;
                        rgbQuads[i].rgbGreen = (i & 0x38) << 2;
                        rgbQuads[i].rgbBlue = i & 0xc0;
                        rgbQuads[i].rgbReserved = 0;
                    }
                }
                }
            }
        }
        break;

    case 15:
        if (Info->bmiHeader.biCompression == BI_BITFIELDS)
        {
            ((PDWORD)Info->bmiColors)[0] = 0x7c00;
            ((PDWORD)Info->bmiColors)[1] = 0x03e0;
            ((PDWORD)Info->bmiColors)[2] = 0x001f;
        }
        break;

    case 16:
        if (Info->bmiHeader.biCompression == BI_BITFIELDS)
        {
            if (psurf->hSecure)
            {
                ((PDWORD)Info->bmiColors)[0] = psurf->ppal->RedMask;
                ((PDWORD)Info->bmiColors)[1] = psurf->ppal->GreenMask;
                ((PDWORD)Info->bmiColors)[2] = psurf->ppal->BlueMask;
            }
            else
            {
                ((PDWORD)Info->bmiColors)[0] = 0xf800;
                ((PDWORD)Info->bmiColors)[1] = 0x07e0;
                ((PDWORD)Info->bmiColors)[2] = 0x001f;
            }
        }
        break;

    case 24:
    case 32:
        if (Info->bmiHeader.biCompression == BI_BITFIELDS)
        {
            if (psurf->hSecure)
            {
                ((PDWORD)Info->bmiColors)[0] = psurf->ppal->RedMask;
                ((PDWORD)Info->bmiColors)[1] = psurf->ppal->GreenMask;
                ((PDWORD)Info->bmiColors)[2] = psurf->ppal->BlueMask;
            }
            else
            {
                ((PDWORD)Info->bmiColors)[0] = 0xff0000;
                ((PDWORD)Info->bmiColors)[1] = 0x00ff00;
                ((PDWORD)Info->bmiColors)[2] = 0x0000ff;
            }
        }
        break;

    default:
        ScanLines = 0;
        goto done;
    }

    Info->bmiHeader.biSizeImage = DIB_GetDIBImageBytes(width, height, bpp);
    Info->bmiHeader.biPlanes = 1;

    if(Bits && ScanLines)
    {
        /* Create a DIBSECTION, blt it, profit */
        PVOID pDIBits ;
        HBITMAP hBmpDest;
        PSURFACE psurfDest;
        EXLATEOBJ exlo;
        RECT rcDest;
        POINTL srcPoint;
        BOOL ret ;
        int newLines = -1;

        if (StartScan >= abs(Info->bmiHeader.biHeight))
        {
            ScanLines = 1;
            goto done;
        }
        else
        {
            ScanLines = min(ScanLines, abs(Info->bmiHeader.biHeight) - StartScan);
        }

        if (abs(Info->bmiHeader.biHeight) < psurf->SurfObj.sizlBitmap.cy)
        {
            StartScan += psurf->SurfObj.sizlBitmap.cy - abs(Info->bmiHeader.biHeight);
        }
        /* Fixup values */
        Info->bmiHeader.biHeight = (height < 0) ?
                                   -(LONG)ScanLines : ScanLines;
        /* Create the DIB */
        hBmpDest = DIB_CreateDIBSection(pDC, Info, Usage, &pDIBits, NULL, 0, 0);
        /* Restore them */
        Info->bmiHeader.biHeight = height;

        if(!hBmpDest)
        {
            DPRINT1("Unable to create a DIB Section!\n");
            EngSetLastError(ERROR_INVALID_PARAMETER);
            ScanLines = 0;
            goto done ;
        }

        psurfDest = SURFACE_ShareLockSurface(hBmpDest);

        RECTL_vSetRect(&rcDest, 0, 0, Info->bmiHeader.biWidth, ScanLines);
        Info->bmiHeader.biWidth = width;
        srcPoint.x = 0;

        if (abs(Info->bmiHeader.biHeight) <= psurf->SurfObj.sizlBitmap.cy)
        {
            srcPoint.y = psurf->SurfObj.sizlBitmap.cy - StartScan - ScanLines;
        }
        else
        {
            /*  Determine the actual number of lines copied from the  */
            /*  original bitmap. It might be different from ScanLines. */
            newLines = abs(Info->bmiHeader.biHeight) - psurf->SurfObj.sizlBitmap.cy;
            newLines = min((int)(StartScan + ScanLines - newLines), psurf->SurfObj.sizlBitmap.cy);
            if (newLines > 0)
            {
                srcPoint.y = psurf->SurfObj.sizlBitmap.cy - newLines;
                if (StartScan > psurf->SurfObj.sizlBitmap.cy)
                {
                    newLines -= (StartScan - psurf->SurfObj.sizlBitmap.cy);
                }
            }
            else
            {
                newLines = 0;
                srcPoint.y = psurf->SurfObj.sizlBitmap.cy;
            }
        }

        EXLATEOBJ_vInitialize(&exlo, psurf->ppal, psurfDest->ppal, 0xffffff, 0xffffff, 0);

        ret = IntEngCopyBits(&psurfDest->SurfObj,
                             &psurf->SurfObj,
                             NULL,
                             &exlo.xlo,
                             &rcDest,
                             &srcPoint);

        SURFACE_ShareUnlockSurface(psurfDest);

        if(!ret)
            ScanLines = 0;
        else
        {
            RtlCopyMemory(Bits, pDIBits, DIB_GetDIBImageBytes (width, ScanLines, bpp));
        }
        /* Update if line count has changed */
        if (newLines != -1)
        {
            ScanLines = (UINT)newLines;
        }
        GreDeleteObject(hBmpDest);
        EXLATEOBJ_vCleanup(&exlo);
    }
    else
    {
        /* Signals success and not the actual number of scan lines*/
        ScanLines = 1;
    }

done:

    if (pbmci)
        DIB_FreeConvertedBitmapInfo(Info, (BITMAPINFO*)pbmci, Usage);

    if (psurf)
        SURFACE_ShareUnlockSurface(psurf);

    if (pDC)
        DC_UnlockDc(pDC);

    return ScanLines;
}

_Success_(return!=0)
__kernel_entry
INT
APIENTRY
NtGdiGetDIBitsInternal(
    _In_ HDC hdc,
    _In_ HBITMAP hbm,
    _In_ UINT iStartScan,
    _In_ UINT cScans,
    _Out_writes_bytes_opt_(cjMaxBits) LPBYTE pjBits,
    _Inout_ LPBITMAPINFO pbmi,
    _In_ UINT iUsage,
    _In_ UINT cjMaxBits,
    _In_ UINT cjMaxInfo)
{
    PBITMAPINFO pbmiSafe;
    HANDLE hSecure = NULL;
    INT iResult = 0;
    UINT cjAlloc;

    /* Check for bad iUsage */
    if (iUsage > 2) return 0;

    /* Check if the size of the bitmap info is large enough */
    if (cjMaxInfo < sizeof(BITMAPCOREHEADER))
    {
        return 0;
    }

    /* Use maximum size */
    cjMaxInfo = min(cjMaxInfo, sizeof(BITMAPV5HEADER) + 256 * sizeof(RGBQUAD));

    // HACK: the underlying code sucks and doesn't care for the size, so we
    // give it the maximum ever needed
    cjAlloc = sizeof(BITMAPV5HEADER) + 256 * sizeof(RGBQUAD);

    /* Allocate a buffer the bitmapinfo */
    pbmiSafe = ExAllocatePoolWithTag(PagedPool, cjAlloc, 'imBG');
    if (!pbmiSafe)
    {
        /* Fail */
        return 0;
    }

    /* Use SEH */
    _SEH2_TRY
    {
        /* Probe and copy the BITMAPINFO */
        ProbeForRead(pbmi, cjMaxInfo, 1);
        RtlCopyMemory(pbmiSafe, pbmi, cjMaxInfo);
    }
    _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
    {
        _SEH2_YIELD(goto cleanup;)
    }
    _SEH2_END;

    /* Check if the header size is large enough */
    if ((pbmiSafe->bmiHeader.biSize < sizeof(BITMAPCOREHEADER)) ||
        (pbmiSafe->bmiHeader.biSize > cjMaxInfo))
    {
        goto cleanup;
    }

    /* Check if the caller provided bitmap bits */
    if (pjBits)
    {
        /* Secure the user mode memory */
        hSecure = EngSecureMem(pjBits, cjMaxBits);
        if (!hSecure)
        {
            goto cleanup;
        }
    }

    /* Now call the internal function */
    iResult = GreGetDIBitsInternal(hdc,
                                   hbm,
                                   iStartScan,
                                   cScans,
                                   pjBits,
                                   pbmiSafe,
                                   iUsage,
                                   cjMaxBits,
                                   cjMaxInfo);

    /* Check for success */
    if (iResult)
    {
        /* Use SEH to copy back to user mode */
        _SEH2_TRY
        {
            /* Copy the data back */
            cjMaxInfo = min(cjMaxInfo, (UINT)DIB_BitmapInfoSize(pbmiSafe, (WORD)iUsage));
            ProbeForWrite(pbmi, cjMaxInfo, 1);
            RtlCopyMemory(pbmi, pbmiSafe, cjMaxInfo);
        }
        _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
        {
            /* Ignore */
            (VOID)0;
        }
        _SEH2_END;
    }

cleanup:
    if (hSecure) EngUnsecureMem(hSecure);
    ExFreePoolWithTag(pbmiSafe, 'imBG');

    return iResult;
}


W32KAPI
INT
APIENTRY
NtGdiStretchDIBitsInternal(
    IN HDC hdc,
    IN INT xDst,
    IN INT yDst,
    IN INT cxDst,
    IN INT cyDst,
    IN INT xSrc,
    IN INT ySrc,
    IN INT cxSrc,
    IN INT cySrc,
    IN OPTIONAL LPBYTE pjInit,
    IN LPBITMAPINFO pbmi,
    IN DWORD dwUsage,
    IN DWORD dwRop, // MS ntgdi.h says dwRop4(?)
    IN UINT cjMaxInfo,
    IN UINT cjMaxBits,
    IN HANDLE hcmXform)
{
    BOOL bResult = FALSE;
    SIZEL sizel;
    RECTL rcSrc, rcDst;
    PDC pdc;
    HBITMAP hbmTmp = 0;
    PSURFACE psurfTmp = 0, psurfDst = 0;
    PPALETTE ppalDIB = 0;
    EXLATEOBJ exlo;
    PVOID pvBits;

    if (!(pdc = DC_LockDc(hdc)))
    {
        EngSetLastError(ERROR_INVALID_HANDLE);
        return 0;
    }

    /* Check for info / mem DC without surface */
    if (!pdc->dclevel.pSurface)
    {
        DC_UnlockDc(pdc);
        // CHECKME
        return TRUE;
    }

    /* Transform dest size */
    sizel.cx = cxDst;
    sizel.cy = cyDst;
    IntLPtoDP(pdc, (POINTL*)&sizel, 1);
    DC_UnlockDc(pdc);

    /* Check if we can use NtGdiSetDIBitsToDeviceInternal */
    if ((sizel.cx == cxSrc) && (sizel.cy == cySrc) && (dwRop == SRCCOPY))
    {
        /* Yes, we can! */
        return NtGdiSetDIBitsToDeviceInternal(hdc,
                                              xDst,
                                              yDst,
                                              cxDst,
                                              cyDst,
                                              xSrc,
                                              ySrc,
                                              0,
                                              cySrc,
                                              pjInit,
                                              pbmi,
                                              dwUsage,
                                              cjMaxBits,
                                              cjMaxInfo,
                                              TRUE,
                                              hcmXform);
    }

    if (pjInit && (cjMaxBits > 0))
    {
        pvBits = ExAllocatePoolWithTag(PagedPool, cjMaxBits, 'pmeT');
        if (!pvBits)
        {
            return 0;
        }

        _SEH2_TRY
        {
            ProbeForRead(pjInit, cjMaxBits, 1);
            RtlCopyMemory(pvBits, pjInit, cjMaxBits);
        }
        _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
        {
            ExFreePoolWithTag(pvBits, 'pmeT');
            _SEH2_YIELD(return 0);
        }
        _SEH2_END
    }
    else
    {
        pvBits = NULL;
    }

    /* FIXME: Locking twice is cheesy, coord tranlation in UM will fix it */
    if (!(pdc = DC_LockDc(hdc)))
    {
        DPRINT1("Could not lock dc\n");
        EngSetLastError(ERROR_INVALID_HANDLE);
        goto cleanup;
    }

    /* Calculate source and destination rect */
    rcSrc.left = xSrc;
    rcSrc.top = ySrc;
    rcSrc.right = xSrc + abs(cxSrc);
    rcSrc.bottom = ySrc + abs(cySrc);
    rcDst.left = xDst;
    rcDst.top = yDst;
    rcDst.right = rcDst.left + cxDst;
    rcDst.bottom = rcDst.top + cyDst;
    IntLPtoDP(pdc, (POINTL*)&rcDst, 2);
    RECTL_vOffsetRect(&rcDst, pdc->ptlDCOrig.x, pdc->ptlDCOrig.y);

    if (pdc->fs & (DC_ACCUM_APP|DC_ACCUM_WMGR))
    {
       IntUpdateBoundsRect(pdc, &rcDst);
    }

    hbmTmp = GreCreateBitmapEx(pbmi->bmiHeader.biWidth,
                               abs(pbmi->bmiHeader.biHeight),
                               0,
                               BitmapFormat(pbmi->bmiHeader.biBitCount,
                                            pbmi->bmiHeader.biCompression),
                               pbmi->bmiHeader.biHeight < 0 ? BMF_TOPDOWN : 0,
                               cjMaxBits,
                               pvBits,
                               0);

    if (!hbmTmp)
    {
        bResult = FALSE;
        goto cleanup;
    }

    psurfTmp = SURFACE_ShareLockSurface(hbmTmp);
    if (!psurfTmp)
    {
        bResult = FALSE;
        goto cleanup;
    }

    /* Create a palette for the DIB */
    ppalDIB = CreateDIBPalette(pbmi, pdc, dwUsage);
    if (!ppalDIB)
    {
        bResult = FALSE;
        goto cleanup;
    }

    /* Prepare DC for blit */
    DC_vPrepareDCsForBlit(pdc, &rcDst, NULL, NULL);

    psurfDst = pdc->dclevel.pSurface;

    /* Initialize XLATEOBJ */
    EXLATEOBJ_vInitialize(&exlo,
                          ppalDIB,
                          psurfDst->ppal,
                          RGB(0xff, 0xff, 0xff),
                          pdc->pdcattr->crBackgroundClr,
                          pdc->pdcattr->crForegroundClr);

    /* Perform the stretch operation */
    bResult = IntEngStretchBlt(&psurfDst->SurfObj,
                               &psurfTmp->SurfObj,
                               NULL,
                               (CLIPOBJ *)&pdc->co,
                               &exlo.xlo,
                               &pdc->dclevel.ca,
                               &rcDst,
                               &rcSrc,
                               NULL,
                               &pdc->eboFill.BrushObject,
                               NULL,
                               WIN32_ROP3_TO_ENG_ROP4(dwRop));

    /* Cleanup */
    DC_vFinishBlit(pdc, NULL);
    EXLATEOBJ_vCleanup(&exlo);
cleanup:
    if (ppalDIB) PALETTE_ShareUnlockPalette(ppalDIB);
    if (psurfTmp) SURFACE_ShareUnlockSurface(psurfTmp);
    if (hbmTmp) GreDeleteObject(hbmTmp);
    if (pdc) DC_UnlockDc(pdc);
    if (pvBits) ExFreePoolWithTag(pvBits, 'pmeT');

    return bResult;
}


HBITMAP
FASTCALL
IntCreateDIBitmap(
    PDC Dc,
    INT width,
    INT height,
    UINT planes,
    UINT bpp,
    ULONG compression,
    DWORD init,
    LPBYTE bits,
    ULONG cjMaxBits,
    PBITMAPINFO data,
    DWORD coloruse)
{
    HBITMAP handle;
    BOOL fColor;
    ULONG BmpFormat = 0;

    if (planes && bpp)
        BmpFormat = BitmapFormat(planes * bpp, compression);

    // Check if we should create a monochrome or color bitmap. We create a monochrome bitmap only if it has exactly 2
    // colors, which are black followed by white, nothing else. In all other cases, we create a color bitmap.

    if (BmpFormat != BMF_1BPP) fColor = TRUE;
    else if ((coloruse > DIB_RGB_COLORS) || ((init & CBM_INIT) == 0) || !data) fColor = FALSE;
    else
    {
        const RGBQUAD *rgb = (RGBQUAD*)((PBYTE)data + data->bmiHeader.biSize);
        DWORD col = RGB(rgb->rgbRed, rgb->rgbGreen, rgb->rgbBlue);

        // Check if the first color of the colormap is black
        if (col == RGB(0, 0, 0))
        {
            rgb++;
            col = RGB(rgb->rgbRed, rgb->rgbGreen, rgb->rgbBlue);

            // If the second color is white, create a monochrome bitmap
            fColor = (col != RGB(0xff,0xff,0xff));
        }
        else fColor = TRUE;
    }

    // Now create the bitmap
    if (fColor)
    {
        if (init & CBM_CREATDIB)
        {
            PSURFACE Surface;
            PPALETTE Palette;

            /* Undocumented flag which creates a DDB of the format specified by the bitmap info. */
            handle = IntCreateCompatibleBitmap(Dc, width, height, planes, bpp);
            if (!handle)
            {
                DPRINT1("IntCreateCompatibleBitmap() failed!\n");
                return NULL;
            }

            /* The palette must also match the given data */
            Surface = SURFACE_ShareLockSurface(handle);
            ASSERT(Surface);
            Palette = CreateDIBPalette(data, Dc, coloruse);
            ASSERT(Palette);
            SURFACE_vSetPalette(Surface, Palette);

            PALETTE_ShareUnlockPalette(Palette);
            SURFACE_ShareUnlockSurface(Surface);
        }
        else
        {
            /* Create a regular compatible bitmap, in the same format as the device */
            handle = IntCreateCompatibleBitmap(Dc, width, height, 0, 0);
        }
    }
    else
    {
        handle = GreCreateBitmap(width,
                                 abs(height),
                                 1,
                                 1,
                                 NULL);
    }

    if (height < 0)
        height = -height;

    if ((NULL != handle) && (CBM_INIT & init))
    {
        IntSetDIBits(Dc, handle, 0, height, bits, cjMaxBits, data, coloruse);
    }

    return handle;
}

// The CreateDIBitmap function creates a device-dependent bitmap (DDB) from a DIB and, optionally, sets the bitmap bits
// The DDB that is created will be whatever bit depth your reference DC is
HBITMAP
APIENTRY
NtGdiCreateDIBitmapInternal(
    IN HDC hDc,
    IN INT cx,
    IN INT cy,
    IN DWORD fInit,
    IN OPTIONAL LPBYTE pjInit,
    IN OPTIONAL LPBITMAPINFO pbmi,
    IN DWORD iUsage,
    IN UINT cjMaxInitInfo,
    IN UINT cjMaxBits,
    IN FLONG fl,
    IN HANDLE hcmXform)
{
    NTSTATUS Status = STATUS_SUCCESS;
    PBYTE safeBits = NULL;
    HBITMAP hbmResult = NULL;

    if (pjInit == NULL)
    {
        fInit &= ~CBM_INIT;
    }

    if(pjInit && (fInit & CBM_INIT))
    {
        if (cjMaxBits == 0) return NULL;
        safeBits = ExAllocatePoolWithTag(PagedPool, cjMaxBits, TAG_DIB);
        if(!safeBits)
        {
            DPRINT1("Failed to allocate %lu bytes\n", cjMaxBits);
            EngSetLastError(ERROR_NOT_ENOUGH_MEMORY);
            return NULL;
        }
    }

    _SEH2_TRY
    {
        if(pbmi) ProbeForRead(pbmi, cjMaxInitInfo, 1);
        if(pjInit && (fInit & CBM_INIT))
        {
            ProbeForRead(pjInit, cjMaxBits, 1);
            RtlCopyMemory(safeBits, pjInit, cjMaxBits);
        }
    }
    _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
    {
        Status = _SEH2_GetExceptionCode();
    }
    _SEH2_END

    if(!NT_SUCCESS(Status))
    {
        DPRINT1("Got an exception! pjInit = %p\n", pjInit);
        SetLastNtError(Status);
        goto cleanup;
    }

    hbmResult =  GreCreateDIBitmapInternal(hDc,
                                           cx,
                                           cy,
                                           fInit,
                                           safeBits,
                                           pbmi,
                                           iUsage,
                                           fl,
                                           cjMaxBits,
                                           hcmXform);

cleanup:
    if (safeBits) ExFreePoolWithTag(safeBits, TAG_DIB);
    return hbmResult;
}

HBITMAP
NTAPI
GreCreateDIBitmapInternal(
    IN HDC hDc,
    IN INT cx,
    IN INT cy,
    IN DWORD fInit,
    IN OPTIONAL LPBYTE pjInit,
    IN OPTIONAL PBITMAPINFO pbmi,
    IN DWORD iUsage,
    IN FLONG fl,
    IN UINT cjMaxBits,
    IN HANDLE hcmXform)
{
    PDC Dc;
    HBITMAP Bmp;
    USHORT bpp, planes;
    DWORD compression;
    HDC hdcDest;

    if (!hDc) /* 1bpp monochrome bitmap */
    {
        // Should use System Bitmap DC hSystemBM, with CreateCompatibleDC for this.
        hdcDest = NtGdiCreateCompatibleDC(0);
        if(!hdcDest)
        {
            DPRINT1("NtGdiCreateCompatibleDC failed\n");
            return NULL;
        }
    }
    else
    {
        hdcDest = hDc;
    }

    Dc = DC_LockDc(hdcDest);
    if (!Dc)
    {
        DPRINT1("Failed to lock hdcDest %p\n", hdcDest);
        EngSetLastError(ERROR_INVALID_HANDLE);
        return NULL;
    }
    /* It's OK to set bpp=0 here, as IntCreateDIBitmap will create a compatible Bitmap
     * if bpp != 1 and ignore the real value that was passed */
    if (pbmi)
    {
        if (pbmi->bmiHeader.biSize == sizeof(BITMAPCOREHEADER))
        {
            BITMAPCOREHEADER* CoreHeader = (BITMAPCOREHEADER*)&pbmi->bmiHeader;
            bpp = CoreHeader->bcBitCount;
            planes = CoreHeader->bcPlanes ? CoreHeader->bcPlanes : 1;
            compression = BI_RGB;
        }
        else
        {
            bpp = pbmi->bmiHeader.biBitCount;
            planes = pbmi->bmiHeader.biPlanes ? pbmi->bmiHeader.biPlanes : 1;
            compression = pbmi->bmiHeader.biCompression;
        }
    }
    else
    {
        bpp = 0;
        planes = 0;
        compression = 0;
    }
    Bmp = IntCreateDIBitmap(Dc, cx, cy, planes, bpp, compression, fInit, pjInit, cjMaxBits, pbmi, iUsage);
    DC_UnlockDc(Dc);

    if(!hDc)
    {
        NtGdiDeleteObjectApp(hdcDest);
    }
    return Bmp;
}

HBITMAP
NTAPI
GreCreateDIBitmapFromPackedDIB(
    _In_reads_(cjPackedDIB )PVOID pvPackedDIB,
    _In_ UINT cjPackedDIB,
    _In_ ULONG uUsage)
{
    PBITMAPINFO pbmi;
    PBYTE pjBits;
    UINT cjInfo, cjBits;
    HBITMAP hbm;

    /* We only support BITMAPINFOHEADER, make sure the size is ok */
    if (cjPackedDIB < sizeof(BITMAPINFOHEADER))
    {
        return NULL;
    }

    /* The packed DIB starts with the BITMAPINFOHEADER */
    pbmi = pvPackedDIB;

    if (cjPackedDIB < pbmi->bmiHeader.biSize)
    {
        return NULL;
    }

    /* Calculate the info size and make sure the packed DIB is large enough */
    cjInfo = DIB_BitmapInfoSize(pbmi, uUsage);
    if (cjPackedDIB <= cjInfo)
    {
        return NULL;
    }

    /* The bitmap bits start after the header */
    pjBits = (PBYTE)pvPackedDIB + cjInfo;
    cjBits = cjPackedDIB - cjInfo;

    hbm = GreCreateDIBitmapInternal(NULL,
                                    pbmi->bmiHeader.biWidth,
                                    abs(pbmi->bmiHeader.biHeight),
                                    CBM_INIT | CBM_CREATDIB,
                                    pjBits,
                                    pbmi,
                                    uUsage,
                                    0,
                                    cjBits,
                                    NULL);

    return hbm;
}

HBITMAP
APIENTRY
NtGdiCreateDIBSection(
    IN HDC hDC,
    IN OPTIONAL HANDLE hSection,
    IN DWORD dwOffset,
    IN BITMAPINFO* bmi,
    IN DWORD Usage,
    IN UINT cjHeader,
    IN FLONG fl,
    IN ULONG_PTR dwColorSpace,
    OUT PVOID *Bits)
{
    HBITMAP hbitmap = 0;
    DC *dc;
    BOOL bDesktopDC = FALSE;
    NTSTATUS Status = STATUS_SUCCESS;

    if (!bmi) return hbitmap; // Make sure.

    _SEH2_TRY
    {
        ProbeForRead(&bmi->bmiHeader.biSize, sizeof(DWORD), 1);
        ProbeForRead(bmi, bmi->bmiHeader.biSize, 1);
        ProbeForRead(bmi, DIB_BitmapInfoSize(bmi, (WORD)Usage), 1);
    }
    _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
    {
        Status = _SEH2_GetExceptionCode();
    }
    _SEH2_END

    if(!NT_SUCCESS(Status))
    {
        SetLastNtError(Status);
        return NULL;
    }

    // If the reference hdc is null, take the desktop dc
    if (hDC == 0)
    {
        hDC = NtGdiCreateCompatibleDC(0);
        bDesktopDC = TRUE;
    }

    if ((dc = DC_LockDc(hDC)))
    {
        hbitmap = DIB_CreateDIBSection(dc,
                                       bmi,
                                       Usage,
                                       Bits,
                                       hSection,
                                       dwOffset,
                                       0);
        DC_UnlockDc(dc);
    }
    else
    {
        EngSetLastError(ERROR_INVALID_HANDLE);
    }

    if (bDesktopDC)
        NtGdiDeleteObjectApp(hDC);

    return hbitmap;
}

HBITMAP
APIENTRY
DIB_CreateDIBSection(
    PDC dc,
    CONST BITMAPINFO *bmi,
    UINT usage,
    LPVOID *bits,
    HANDLE section,
    DWORD offset,
    DWORD ovr_pitch)
{
    HBITMAP res = 0;
    SURFACE *bmp = NULL;
    void *mapBits = NULL;
    PPALETTE ppalDIB = NULL;

    // Fill BITMAP32 structure with DIB data
    CONST BITMAPINFOHEADER *bi = &bmi->bmiHeader;
    INT effHeight;
    ULONG totalSize;
    BITMAP bm;
    //SIZEL Size;
    HANDLE hSecure;

    DPRINT("format (%ld,%ld), planes %u, bpp %u, size %lu, colors %lu (%s)\n",
           bi->biWidth, bi->biHeight, bi->biPlanes, bi->biBitCount,
           bi->biSizeImage, bi->biClrUsed, usage == DIB_PAL_COLORS? "PAL" : "RGB");

    /* CreateDIBSection should fail for compressed formats */
    if (bi->biCompression == BI_RLE4 || bi->biCompression == BI_RLE8)
    {
        DPRINT1("no compressed format allowed\n");
        return (HBITMAP)NULL;
    }

    effHeight = bi->biHeight >= 0 ? bi->biHeight : -bi->biHeight;
    bm.bmType = 0;
    bm.bmWidth = bi->biWidth;
    bm.bmHeight = effHeight;
    bm.bmWidthBytes = ovr_pitch ? ovr_pitch : WIDTH_BYTES_ALIGN32(bm.bmWidth, bi->biBitCount);

    bm.bmPlanes = bi->biPlanes;
    bm.bmBitsPixel = bi->biBitCount;
    bm.bmBits = NULL;

    // Get storage location for DIB bits.  Only use biSizeImage if it's valid and
    // we're dealing with a compressed bitmap.  Otherwise, use width * height.
    totalSize = (bi->biSizeImage && (bi->biCompression != BI_RGB) && (bi->biCompression != BI_BITFIELDS))
                ? bi->biSizeImage : (ULONG)(bm.bmWidthBytes * effHeight);

    if (section)
    {
        SYSTEM_BASIC_INFORMATION Sbi;
        NTSTATUS Status;
        DWORD mapOffset;
        LARGE_INTEGER SectionOffset;
        SIZE_T mapSize;

        Status = ZwQuerySystemInformation(SystemBasicInformation,
                                          &Sbi,
                                          sizeof Sbi,
                                          0);
        if (!NT_SUCCESS(Status))
        {
            DPRINT1("ZwQuerySystemInformation failed (0x%lx)\n", Status);
            return NULL;
        }

        mapOffset = offset - (offset % Sbi.AllocationGranularity);
        mapSize = totalSize + (offset - mapOffset);

        SectionOffset.LowPart  = mapOffset;
        SectionOffset.HighPart = 0;

        Status = ZwMapViewOfSection(section,
                                    NtCurrentProcess(),
                                    &mapBits,
                                    0,
                                    0,
                                    &SectionOffset,
                                    &mapSize,
                                    ViewShare,
                                    0,
                                    PAGE_READWRITE);
        if (!NT_SUCCESS(Status))
        {
            DPRINT1("ZwMapViewOfSection failed (0x%lx)\n", Status);
            EngSetLastError(ERROR_INVALID_PARAMETER);
            return NULL;
        }

        if (mapBits) bm.bmBits = (char *)mapBits + (offset - mapOffset);
    }
    else if (ovr_pitch && offset)
        bm.bmBits = UlongToPtr(offset);
    else
    {
        offset = 0;
        bm.bmBits = EngAllocUserMem(totalSize, 0);
        if(!bm.bmBits)
        {
            DPRINT1("Failed to allocate memory\n");
            goto cleanup;
        }
    }

//  hSecure = MmSecureVirtualMemory(bm.bmBits, totalSize, PAGE_READWRITE);
    hSecure = (HANDLE)0x1; // HACK OF UNIMPLEMENTED KERNEL STUFF !!!!


    // Create Device Dependent Bitmap and add DIB pointer
    //Size.cx = bm.bmWidth;
    //Size.cy = abs(bm.bmHeight);
    res = GreCreateBitmapEx(bm.bmWidth,
                            abs(bm.bmHeight),
                            bm.bmWidthBytes,
                            BitmapFormat(bi->biBitCount * bi->biPlanes, bi->biCompression),
                            BMF_DONTCACHE | BMF_USERMEM | BMF_NOZEROINIT |
                            ((bi->biHeight < 0) ? BMF_TOPDOWN : 0),
                            totalSize,
                            bm.bmBits,
                            0);
    if (!res)
    {
        DPRINT1("GreCreateBitmapEx failed\n");
        EngSetLastError(ERROR_NO_SYSTEM_RESOURCES);
        goto cleanup;
    }
    bmp = SURFACE_ShareLockSurface(res); // HACK
    if (NULL == bmp)
    {
        DPRINT1("SURFACE_LockSurface failed\n");
        EngSetLastError(ERROR_INVALID_HANDLE);
        goto cleanup;
    }

    /* WINE NOTE: WINE makes use of a colormap, which is a color translation
                  table between the DIB and the X physical device. Obviously,
                  this is left out of the ReactOS implementation. Instead,
                  we call NtGdiSetDIBColorTable. */
    bmp->hDIBSection = section;
    bmp->hSecure = hSecure;
    bmp->dwOffset = offset;
    bmp->flags = API_BITMAP;
    bmp->biClrImportant = bi->biClrImportant;

    /* Create a palette for the DIB */
    ppalDIB = CreateDIBPalette(bmi, dc, usage);

    // Clean up in case of errors
cleanup:
    if (!res || !bmp || !bm.bmBits || !ppalDIB)
    {
        DPRINT("Got an error res=%p, bmp=%p, bm.bmBits=%p\n", res, bmp, bm.bmBits);
        if (bm.bmBits)
        {
            // MmUnsecureVirtualMemory(hSecure); // FIXME: Implement this!
            if (section)
            {
                ZwUnmapViewOfSection(NtCurrentProcess(), mapBits);
                bm.bmBits = NULL;
            }
            else if (!offset)
                EngFreeUserMem(bm.bmBits), bm.bmBits = NULL;
        }

        if (bmp)
        {
            SURFACE_ShareUnlockSurface(bmp);
            bmp = NULL;
        }

        if (res)
        {
            GreDeleteObject(res);
            res = 0;
        }

        if(ppalDIB)
        {
            PALETTE_ShareUnlockPalette(ppalDIB);
        }
    }

    if (bmp)
    {
        /* If we're here, everything went fine */
        SURFACE_vSetPalette(bmp, ppalDIB);
        PALETTE_ShareUnlockPalette(ppalDIB);
        SURFACE_ShareUnlockSurface(bmp);
    }

    // Return BITMAP handle and storage location
    if (NULL != bm.bmBits && NULL != bits)
    {
        *bits = bm.bmBits;
    }

    return res;
}

/***********************************************************************
 *           DIB_GetBitmapInfo
 *
 * Get the info from a bitmap header.
 * Return 0 for COREHEADER, 1 for INFOHEADER, -1 for error.
 */
int
FASTCALL
DIB_GetBitmapInfo( const BITMAPINFOHEADER *header, LONG *width,
                   LONG *height, WORD *planes, WORD *bpp, DWORD *compr, DWORD *size )
{
    if (header->biSize == sizeof(BITMAPCOREHEADER))
    {
        const BITMAPCOREHEADER *core = (const BITMAPCOREHEADER *)header;
        *width  = core->bcWidth;
        *height = core->bcHeight;
        *planes = core->bcPlanes;
        *bpp    = core->bcBitCount;
        *compr  = BI_RGB;
        *size   = 0;
        return 0;
    }
    if (header->biSize >= sizeof(BITMAPINFOHEADER)) /* Assume BITMAPINFOHEADER */
    {
        *width  = header->biWidth;
        *height = header->biHeight;
        *planes = header->biPlanes;
        *bpp    = header->biBitCount;
        *compr  = header->biCompression;
        *size   = header->biSizeImage;
        return 1;
    }
    DPRINT1("(%u): unknown/wrong size for header\n", header->biSize );
    return -1;
}

/***********************************************************************
 *           DIB_GetDIBImageBytes
 *
 * Return the number of bytes used to hold the image in a DIB bitmap.
 * 11/16/1999 (RJJ) lifted from wine
 */

INT APIENTRY DIB_GetDIBImageBytes(INT  width, INT height, INT depth)
{
    return WIDTH_BYTES_ALIGN32(width, depth) * (height < 0 ? -height : height);
}

/***********************************************************************
 *           DIB_BitmapInfoSize
 *
 * Return the size of the bitmap info structure including color table.
 * 11/16/1999 (RJJ) lifted from wine
 */

INT FASTCALL DIB_BitmapInfoSize(const BITMAPINFO * info, WORD coloruse)
{
    unsigned int colors, size, masks = 0;
    unsigned int colorsize;

    colorsize = (coloruse == DIB_RGB_COLORS) ? sizeof(RGBQUAD) :
                (coloruse == DIB_PAL_INDICES) ? 0 :
                sizeof(WORD);

    if (info->bmiHeader.biSize == sizeof(BITMAPCOREHEADER))
    {
        const BITMAPCOREHEADER *core = (const BITMAPCOREHEADER *)info;
        colors = (core->bcBitCount <= 8) ? 1 << core->bcBitCount : 0;
        return sizeof(BITMAPCOREHEADER) + colors * colorsize;
    }
    else  /* Assume BITMAPINFOHEADER */
    {
        colors = info->bmiHeader.biClrUsed;
        if (colors > 256) colors = 256;
        if (!colors && (info->bmiHeader.biBitCount <= 8))
            colors = 1 << info->bmiHeader.biBitCount;
        if (info->bmiHeader.biCompression == BI_BITFIELDS) masks = 3;
        size = max( info->bmiHeader.biSize, sizeof(BITMAPINFOHEADER) + masks * sizeof(DWORD) );
        return size + colors * colorsize;
    }
}

HPALETTE
FASTCALL
DIB_MapPaletteColors(PPALETTE ppalDc, CONST BITMAPINFO* lpbmi)
{
    PPALETTE ppalNew;
    ULONG nNumColors,i;
    USHORT *lpIndex;
    HPALETTE hpal;

    if (!(ppalDc->flFlags & PAL_INDEXED))
    {
        return NULL;
    }

    nNumColors = 1 << lpbmi->bmiHeader.biBitCount;
    if (lpbmi->bmiHeader.biClrUsed)
    {
        nNumColors = min(nNumColors, lpbmi->bmiHeader.biClrUsed);
    }

    ppalNew = PALETTE_AllocPalWithHandle(PAL_INDEXED, nNumColors, NULL, 0, 0, 0);
    if (ppalNew == NULL)
    {
        DPRINT1("Could not allocate palette\n");
        return NULL;
    }

    lpIndex = (USHORT *)((PBYTE)lpbmi + lpbmi->bmiHeader.biSize);

    for (i = 0; i < nNumColors; i++)
    {
        ULONG iColorIndex = *lpIndex % ppalDc->NumColors;
        ppalNew->IndexedColors[i] = ppalDc->IndexedColors[iColorIndex];
        lpIndex++;
    }

    hpal = ppalNew->BaseObject.hHmgr;
    PALETTE_UnlockPalette(ppalNew);

    return hpal;
}

/* Converts a BITMAPCOREINFO to a BITMAPINFO structure,
 * or does nothing if it's already a BITMAPINFO (or V4 or V5) */
BITMAPINFO*
FASTCALL
DIB_ConvertBitmapInfo (CONST BITMAPINFO* pbmi, DWORD Usage)
{
    CONST BITMAPCOREINFO* pbmci = (BITMAPCOREINFO*)pbmi;
    BITMAPINFO* pNewBmi ;
    UINT numColors = 0, ColorsSize = 0;

    if(pbmi->bmiHeader.biSize >= sizeof(BITMAPINFOHEADER)) return (BITMAPINFO*)pbmi;
    if(pbmi->bmiHeader.biSize != sizeof(BITMAPCOREHEADER)) return NULL;

    if(pbmci->bmciHeader.bcBitCount <= 8)
    {
        numColors = 1 << pbmci->bmciHeader.bcBitCount;
        if(Usage == DIB_PAL_COLORS)
        {
            ColorsSize = numColors * sizeof(WORD);
        }
        else
        {
            ColorsSize = numColors * sizeof(RGBQUAD);
        }
    }
    else if (Usage == DIB_PAL_COLORS)
    {
        /* Invalid at high-res */
        return NULL;
    }

    pNewBmi = ExAllocatePoolWithTag(PagedPool, sizeof(BITMAPINFOHEADER) + ColorsSize, TAG_DIB);
    if(!pNewBmi) return NULL;

    RtlZeroMemory(pNewBmi, sizeof(BITMAPINFOHEADER) + ColorsSize);

    pNewBmi->bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
    pNewBmi->bmiHeader.biBitCount = pbmci->bmciHeader.bcBitCount;
    pNewBmi->bmiHeader.biWidth = pbmci->bmciHeader.bcWidth;
    pNewBmi->bmiHeader.biHeight = pbmci->bmciHeader.bcHeight;
    pNewBmi->bmiHeader.biPlanes = pbmci->bmciHeader.bcPlanes;
    pNewBmi->bmiHeader.biCompression = BI_RGB ;
    pNewBmi->bmiHeader.biSizeImage = DIB_GetDIBImageBytes(pNewBmi->bmiHeader.biWidth,
                                     pNewBmi->bmiHeader.biHeight,
                                     pNewBmi->bmiHeader.biBitCount);
    pNewBmi->bmiHeader.biClrUsed = numColors;

    if(Usage == DIB_PAL_COLORS)
    {
        RtlCopyMemory(pNewBmi->bmiColors, pbmci->bmciColors, ColorsSize);
    }
    else
    {
        UINT i;
        for(i=0; i<numColors; i++)
        {
            pNewBmi->bmiColors[i].rgbRed = pbmci->bmciColors[i].rgbtRed;
            pNewBmi->bmiColors[i].rgbGreen = pbmci->bmciColors[i].rgbtGreen;
            pNewBmi->bmiColors[i].rgbBlue = pbmci->bmciColors[i].rgbtBlue;
        }
    }

    return pNewBmi ;
}

/* Frees a BITMAPINFO created with DIB_ConvertBitmapInfo */
VOID
FASTCALL
DIB_FreeConvertedBitmapInfo(BITMAPINFO* converted, BITMAPINFO* orig, DWORD usage)
{
    BITMAPCOREINFO* pbmci;
    if(converted == orig)
        return;

    if(usage == -1)
    {
        /* Caller don't want any conversion */
        ExFreePoolWithTag(converted, TAG_DIB);
        return;
    }

    /* Perform inverse conversion */
    pbmci = (BITMAPCOREINFO*)orig;

    ASSERT(pbmci->bmciHeader.bcSize == sizeof(BITMAPCOREHEADER));
    pbmci->bmciHeader.bcBitCount = converted->bmiHeader.biBitCount;
    pbmci->bmciHeader.bcWidth = converted->bmiHeader.biWidth;
    pbmci->bmciHeader.bcHeight = converted->bmiHeader.biHeight;
    pbmci->bmciHeader.bcPlanes = converted->bmiHeader.biPlanes;

    if(pbmci->bmciHeader.bcBitCount <= 8)
    {
        UINT numColors = converted->bmiHeader.biClrUsed;
        if(!numColors) numColors = 1 << pbmci->bmciHeader.bcBitCount;
        if(usage == DIB_PAL_COLORS)
        {
            RtlZeroMemory(pbmci->bmciColors, (1 << pbmci->bmciHeader.bcBitCount) * sizeof(WORD));
            RtlCopyMemory(pbmci->bmciColors, converted->bmiColors, numColors * sizeof(WORD));
        }
        else
        {
            UINT i;
            RtlZeroMemory(pbmci->bmciColors, (1 << pbmci->bmciHeader.bcBitCount) * sizeof(RGBTRIPLE));
            for(i=0; i<numColors; i++)
            {
                pbmci->bmciColors[i].rgbtRed = converted->bmiColors[i].rgbRed;
                pbmci->bmciColors[i].rgbtGreen = converted->bmiColors[i].rgbGreen;
                pbmci->bmciColors[i].rgbtBlue = converted->bmiColors[i].rgbBlue;
            }
        }
    }
    /* Now free it, it's not needed anymore */
    ExFreePoolWithTag(converted, TAG_DIB);
}

/* EOF */