HBITMAP FASTCALL BITMAP_CopyBitmap ( HBITMAP hBitmap )
Definition at line 589 of file bitmaps.c.
Referenced by IntGdiCreatePatternBrush(), NtUserGetIconInfo(), and UserDrawIconEx().
{
    HBITMAP hbmNew;
    SURFACE *psurfSrc, *psurfNew;

    /* Fail, if no source bitmap is given */
    if (hBitmap == NULL) return 0;

    /* Lock the source bitmap */
    psurfSrc = SURFACE_ShareLockSurface(hBitmap);
    if (psurfSrc == NULL)
    {
        return 0;
    }

    /* Allocate a new bitmap with the same dimensions as the source bmp */
    hbmNew = GreCreateBitmapEx(psurfSrc->SurfObj.sizlBitmap.cx,
                               psurfSrc->SurfObj.sizlBitmap.cy,
                               abs(psurfSrc->SurfObj.lDelta),
                               psurfSrc->SurfObj.iBitmapFormat,
                               psurfSrc->SurfObj.fjBitmap & BMF_TOPDOWN,
                               psurfSrc->SurfObj.cjBits,
                               NULL,
                               psurfSrc->flags);

    if (hbmNew)
    {
        /* Lock the new bitmap */
        psurfNew = SURFACE_ShareLockSurface(hbmNew);
        if (psurfNew)
        {
            /* Copy the bitmap bits to the new bitmap buffer */
            RtlCopyMemory(psurfNew->SurfObj.pvBits,
                          psurfSrc->SurfObj.pvBits,
                          psurfNew->SurfObj.cjBits);

            /* Dereference the new bitmaps palette, we will use a different */
            GDIOBJ_vDereferenceObject(&psurfNew->ppal->BaseObject);

            /* Reference the palette of the source bitmap and use it */
            GDIOBJ_vReferenceObjectByPointer(&psurfSrc->ppal->BaseObject);
            psurfNew->ppal = psurfSrc->ppal;

            /* Unlock the new surface */
            SURFACE_ShareUnlockSurface(psurfNew);
        }
        else
        {
            /* Failed to lock the bitmap, shouldn't happen */
            GreDeleteObject(hbmNew);
            hbmNew = NULL;
        }
    }

    /* Unlock the source bitmap and return the handle of the new bitmap */
    SURFACE_ShareUnlockSurface(psurfSrc);
    return hbmNew;
}
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