enhmfile.c

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#include "precomp.h"

#define NDEBUG
#include <debug.h>



/*
 * @unimplemented
 */
HENHMETAFILE
WINAPI
CloseEnhMetaFile(
    HDC hdc)
{
    UNIMPLEMENTED;
    return 0;
}


#if 0 // Remove once new EnhMetaFile support is implemented.
HDC
WINAPI
CreateEnhMetaFileW(
    HDC           hDC,        /* [in] optional reference DC */
    LPCWSTR       filename,   /* [in] optional filename for disk metafiles */
    const RECT*   rect,       /* [in] optional bounding rectangle */
    LPCWSTR       description /* [in] optional description */
)
{
    HDC mDC;
    PDC_ATTR Dc_Attr;
    PLDC pLDC;
    HANDLE hFile;
    PENHMETAFILE EmfDC;
    DWORD size = 0, length = 0;

    mDC = NtGdiCreateMetafileDC( hDC ); // Basically changes the handle from 1xxxx to 46xxxx.
    // If hDC == NULL, works just like createdc in win32k.

    if ( !GdiGetHandleUserData((HGDIOBJ) mDC, GDI_OBJECT_TYPE_DC, (PVOID) &Dc_Attr))
    {
        SetLastError (ERROR_INVALID_PARAMETER);
        return NULL; // need to delete the handle?
    }

    pLDC = LocalAlloc(LMEM_ZEROINIT, sizeof(LDC));

    Dc_Attr->pvLDC = pLDC;
    pLDC->hDC = mDC;
    pLDC->iType = LDC_EMFDC


                  if (description)
    {
        /* App name\0Title\0\0 */
        length = lstrlenW(description);
        length += lstrlenW(description + length + 1);
        length += 3;
        length *= 2;
    }

    size = sizeof(ENHMETAFILE) + (length + 3) / 4 * 4;

    //Allocate ENHMETAFILE structure
    EmfDC = LocalAlloc(LMEM_ZEROINIT, sizeof(ENHMETAFILE));
    pLDC->pvEmfDC = EmfDC;

    EmfDC->handles_size = HANDLE_LIST_INC;
    EmfDC->cur_handles = 1;

    EmfDC->horzres = GetDeviceCaps(mDC, HORZRES);
    EmfDC->vertres = GetDeviceCaps(mDC, VERTRES);
    EmfDC->logpixelsx = GetDeviceCaps(mDC, LOGPIXELSX);
    EmfDC->logpixelsy = GetDeviceCaps(mDC, LOGPIXELSY);
    EmfDC->horzsize = GetDeviceCaps(mDC, HORZSIZE);
    EmfDC->vertsize = GetDeviceCaps(mDC, VERTSIZE);
    EmfDC->bitspixel = GetDeviceCaps(mDC, BITSPIXEL);
    EmfDC->textcaps = GetDeviceCaps(mDC, TEXTCAPS);
    EmfDC->rastercaps = GetDeviceCaps(mDC, RASTERCAPS);
    EmfDC->technology = GetDeviceCaps(mDC, TECHNOLOGY);
    EmfDC->planes = GetDeviceCaps(mDC, PLANES);

    EmfDC->emf = LocalAlloc(LMEM_ZEROINIT, size);

    EmfDC->emf->iType = EMR_HEADER;
    EmfDC->emf->nSize = size;

    EmfDC->emf->rclBounds.left = EmfDC->emf->rclBounds.top = 0;
    EmfDC->emf->rclBounds.right = EmfDC->emf->rclBounds.bottom = -1;

    if(rect)
    {
        EmfDC->emf->rclFrame.left   = rect->left;
        EmfDC->emf->rclFrame.top    = rect->top;
        EmfDC->emf->rclFrame.right  = rect->right;
        EmfDC->emf->rclFrame.bottom = rect->bottom;
    }
    else
    {
        /* Set this to {0,0 - -1,-1} and update it at the end */
        EmfDC->emf->rclFrame.left = EmfDC->emf->rclFrame.top = 0;
        EmfDC->emf->rclFrame.right = EmfDC->emf->rclFrame.bottom = -1;
    }

    EmfDC->emf->dSignature = ENHMETA_SIGNATURE;
    EmfDC->emf->nVersion = 0x10000;
    EmfDC->emf->nBytes = pLDC->pvEmfDC->nSize;
    EmfDC->emf->nRecords = 1;
    EmfDC->emf->nHandles = 1;

    EmfDC->emf->sReserved = 0; /* According to docs, this is reserved and must be 0 */
    EmfDC->emf->nDescription = length / 2;

    EmfDC->emf->offDescription = length ? sizeof(ENHMETAHEADER) : 0;

    EmfDC->emf->nPalEntries = 0; /* I guess this should start at 0 */

    /* Size in pixels */
    EmfDC->emf->szlDevice.cx = EmfDC->horzres;
    EmfDC->emf->szlDevice.cy = EmfDC->vertres;

    /* Size in millimeters */
    EmfDC->emf->szlMillimeters.cx = EmfDC->horzsize;
    EmfDC->emf->szlMillimeters.cy = EmfDC->vertsize;

    /* Size in micrometers */
    EmfDC->emf->szlMicrometers.cx = EmfDC->horzsize * 1000;
    EmfDC->emf->szlMicrometers.cy = EmfDC->vertsize * 1000;

    RtlCopyMemory((char *)EmfDC->emf + sizeof(ENHMETAHEADER), description, length);

    if (filename)  /* disk based metafile */
    {
        if ((hFile = CreateFileW(filename, GENERIC_WRITE | GENERIC_READ, 0,
                                 NULL, CREATE_ALWAYS, 0, 0)) == INVALID_HANDLE_VALUE)
        {
            EMFDRV_DeleteDC( EmfDC );
            return NULL;
        }
        if (!WriteFile( hFile, (LPSTR)EmfDC->emf, size, NULL, NULL ))
        {
            EMFDRV_DeleteDC( EmfDC );
            return NULL;
        }
        EmfDC.hFile = hFile;
        EmfDC.iType = METAFILE_DISK;
    }
    else
        EmfDC.iType = METAFILE_MEMORY;

    return mDC;
}
#endif


/*
 * @unimplemented
 */
HENHMETAFILE
WINAPI
CopyEnhMetaFileA(
    HENHMETAFILE    hemfSrc,
    LPCSTR      lpszFile)
{
    NTSTATUS Status;
    LPWSTR lpszFileW;
    HENHMETAFILE rc = 0;

    Status = HEAP_strdupA2W ( &lpszFileW, lpszFile );
    if (!NT_SUCCESS (Status))
        SetLastError (RtlNtStatusToDosError(Status));
    else
    {
        rc = NULL;

        HEAP_free ( lpszFileW );
    }
    return rc;
}


/*
 * @unimplemented
 */
HDC
WINAPI
CreateEnhMetaFileA(
    HDC     hdcRef,
    LPCSTR      lpFileName,
    CONST RECT  *lpRect,
    LPCSTR      lpDescription)
{
    NTSTATUS Status;
    LPWSTR lpFileNameW, lpDescriptionW;
    HDC rc = 0;

    lpFileNameW = NULL;
    if (lpFileName != NULL)
    {
        Status = HEAP_strdupA2W ( &lpFileNameW, lpFileName );
        if (!NT_SUCCESS (Status))
            SetLastError (RtlNtStatusToDosError(Status));

        return rc;
    }

    lpDescriptionW = NULL;
    if (lpDescription != NULL)
    {
        Status = HEAP_strdupA2W ( &lpDescriptionW, lpDescription );
        if (!NT_SUCCESS (Status))
            SetLastError (RtlNtStatusToDosError(Status));

        return rc;
    }

    rc = NULL;

    if (lpDescriptionW != NULL)
        HEAP_free ( lpDescriptionW );

    if (lpFileNameW != NULL)
        HEAP_free ( lpFileNameW );

    return rc;
}

#if 0
/* Previous implementation in win32k */
HDC
WINAPI
NtGdiCreateEnhMetaFile(HDC  hDCRef,
                       LPCWSTR  File,
                       CONST LPRECT  Rect,
                       LPCWSTR  Description)
{
    PDC Dc;
    HDC ret = NULL;
    DWORD length = 0;
    HDC tempHDC;
    DWORD MemSize;
    DWORD dwDesiredAccess;

    tempHDC = hDCRef;
    if (hDCRef == NULL)
    {
        /* FIXME ??
         * Shall we create hdc NtGdiHdcCompatible hdc ??
         */
        UNICODE_STRING DriverName;
        RtlInitUnicodeString(&DriverName, L"DISPLAY");
        //IntGdiCreateDC(&DriverName, NULL, NULL, NULL, FALSE);
        tempHDC = NtGdiOpenDCW( &DriverName,
                                NULL,
                                NULL,
                                0,  // DCW 0 and ICW 1.
                                NULL,
                                (PVOID) NULL,
                                (PVOID) NULL );
    }

    GDIOBJ_SetOwnership(GdiHandleTable, tempHDC, PsGetCurrentProcess());
    DC_SetOwnership(tempHDC, PsGetCurrentProcess());

    Dc = DC_LockDc(tempHDC);
    if (Dc == NULL)
    {
        if (hDCRef == NULL)
        {
            NtGdiDeleteObjectApp(tempHDC);
        }
        SetLastWin32Error(ERROR_INVALID_HANDLE);
        return NULL;
    }

    if(Description)
    {
        length = wcslen(Description);
        length += wcslen(Description + length + 1);
        length += 3;
        length *= 2;
    }

    MemSize = sizeof(ENHMETAHEADER) + (length + 3) / 4 * 4;

    if (!(Dc->emh = EngAllocMem(FL_ZERO_MEMORY, MemSize, 0)))
    {
        DC_UnlockDc(Dc);
        if (hDCRef == NULL)
        {
            NtGdiDeleteObjectApp(tempHDC);
        }
        SetLastWin32Error(ERROR_INVALID_HANDLE);
        return NULL;
    }

    Dc->emh->iType = EMR_HEADER;
    Dc->emh->nSize = MemSize;

    Dc->emh->rclBounds.left = Dc->emh->rclBounds.top = 0;
    Dc->emh->rclBounds.right = Dc->emh->rclBounds.bottom = -1;

    if(Rect)
    {
        Dc->emh->rclFrame.left   = Rect->left;
        Dc->emh->rclFrame.top    = Rect->top;
        Dc->emh->rclFrame.right  = Rect->right;
        Dc->emh->rclFrame.bottom = Rect->bottom;
    }
    else
    {
        /* Set this to {0,0 - -1,-1} and update it at the end */
        Dc->emh->rclFrame.left = Dc->emh->rclFrame.top = 0;
        Dc->emh->rclFrame.right = Dc->emh->rclFrame.bottom = -1;
    }

    Dc->emh->dSignature = ENHMETA_SIGNATURE;
    Dc->emh->nVersion = 0x10000;
    Dc->emh->nBytes = Dc->emh->nSize;
    Dc->emh->nRecords = 1;
    Dc->emh->nHandles = 1;

    Dc->emh->sReserved = 0; /* According to docs, this is reserved and must be 0 */
    Dc->emh->nDescription = length / 2;

    Dc->emh->offDescription = length ? sizeof(ENHMETAHEADER) : 0;

    Dc->emh->nPalEntries = 0; /* I guess this should start at 0 */

    /* Size in pixels */
    Dc->emh->szlDevice.cx = NtGdiGetDeviceCaps(tempHDC, HORZRES);
    Dc->emh->szlDevice.cy = NtGdiGetDeviceCaps(tempHDC, VERTRES);

    /* Size in millimeters */
    Dc->emh->szlMillimeters.cx = NtGdiGetDeviceCaps(tempHDC, HORZSIZE);
    Dc->emh->szlMillimeters.cy = NtGdiGetDeviceCaps(tempHDC, VERTSIZE);

    /* Size in micrometers */
    Dc->emh->szlMicrometers.cx = Dc->emh->szlMillimeters.cx * 1000;
    Dc->emh->szlMicrometers.cy = Dc->emh->szlMillimeters.cy * 1000;

    if(Description)
    {
        memcpy((char *)Dc->emh + sizeof(ENHMETAHEADER), Description, length);
    }

    ret = tempHDC;
    if (File)
    {
        OBJECT_ATTRIBUTES ObjectAttributes;
        IO_STATUS_BLOCK IoStatusBlock;
        IO_STATUS_BLOCK Iosb;
        UNICODE_STRING NtPathU;
        NTSTATUS Status;
        ULONG FileAttributes = (FILE_ATTRIBUTE_VALID_FLAGS & ~FILE_ATTRIBUTE_DIRECTORY);

        DPRINT1("Trying Create EnhMetaFile\n");

        /* disk based metafile */
        dwDesiredAccess = GENERIC_WRITE | GENERIC_READ | SYNCHRONIZE | FILE_READ_ATTRIBUTES;

        if (!RtlDosPathNameToNtPathName_U (File, &NtPathU, NULL, NULL))
        {
            DC_UnlockDc(Dc);
            if (hDCRef == NULL)
            {
                NtGdiDeleteObjectApp(tempHDC);
            }
            DPRINT1("Can not Create EnhMetaFile\n");
            SetLastWin32Error(ERROR_PATH_NOT_FOUND);
            return NULL;
        }

        InitializeObjectAttributes(&ObjectAttributes, &NtPathU, 0, NULL, NULL);

        Status = NtCreateFile (&Dc->hFile, dwDesiredAccess, &ObjectAttributes, &IoStatusBlock,
                               NULL, FileAttributes, 0, FILE_OVERWRITE_IF, FILE_NON_DIRECTORY_FILE,
                               NULL, 0);

        RtlFreeHeap(RtlGetProcessHeap(), 0, NtPathU.Buffer);

        if (!NT_SUCCESS(Status))
        {
            Dc->hFile = NULL;
            DC_UnlockDc(Dc);
            if (hDCRef == NULL)
            {
                NtGdiDeleteObjectApp(tempHDC);
            }
            DPRINT1("Create EnhMetaFile fail\n");
            SetLastWin32Error(ERROR_INVALID_HANDLE);
            return NULL;
        }

        SetLastWin32Error(IoStatusBlock.Information == FILE_OVERWRITTEN ? ERROR_ALREADY_EXISTS : 0);

        Status = NtWriteFile(Dc->hFile, NULL, NULL, NULL, &Iosb, (PVOID)&Dc->emh, Dc->emh->nSize, NULL, NULL);
        if (Status == STATUS_PENDING)
        {
            Status = NtWaitForSingleObject(Dc->hFile,FALSE,NULL);
            if (NT_SUCCESS(Status))
            {
                Status = Iosb.Status;
            }
        }

        if (NT_SUCCESS(Status))
        {
            ret = tempHDC;
            DC_UnlockDc(Dc);
        }
        else
        {
            Dc->hFile = NULL;
            DPRINT1("Write to EnhMetaFile fail\n");
            SetLastWin32Error(ERROR_CAN_NOT_COMPLETE);
            ret = NULL;
            DC_UnlockDc(Dc);
            if (hDCRef == NULL)
            {
                NtGdiDeleteObjectApp(tempHDC);
            }
        }
    }
    else
    {
        DC_UnlockDc(Dc);
    }

    return ret;
}
#endif



/*
 * @unimplemented
 */
HENHMETAFILE
WINAPI
GetEnhMetaFileA(
    LPCSTR  lpszMetaFile)
{
    NTSTATUS Status;
    LPWSTR lpszMetaFileW;
    HENHMETAFILE rc = 0;

    Status = HEAP_strdupA2W ( &lpszMetaFileW, lpszMetaFile );
    if (!NT_SUCCESS (Status))
        SetLastError (RtlNtStatusToDosError(Status));
    else
    {
        rc = NULL;

        HEAP_free ( lpszMetaFileW );
    }

    return rc;
}


/*
 * @unimplemented
 */
UINT
WINAPI
GetEnhMetaFileDescriptionA(
    HENHMETAFILE    hemf,
    UINT        cchBuffer,
    LPSTR       lpszDescription)
{
    NTSTATUS Status;
    LPWSTR lpszDescriptionW;

    if ( lpszDescription && cchBuffer )
    {
        lpszDescriptionW = (LPWSTR)HEAP_alloc ( cchBuffer*sizeof(WCHAR) );
        if ( !lpszDescriptionW )
        {
            SetLastError (RtlNtStatusToDosError(STATUS_NO_MEMORY));
            return 0;
        }
    }
    else
        lpszDescriptionW = NULL;

    if ( lpszDescription && cchBuffer )
    {
        Status = RtlUnicodeToMultiByteN ( lpszDescription,
                                          cchBuffer,
                                          NULL,
                                          lpszDescriptionW,
                                          cchBuffer );
        HEAP_free ( lpszDescriptionW );
        if ( !NT_SUCCESS(Status) )
        {
            SetLastError (RtlNtStatusToDosError(Status));
            return 0;
        }
    }

    return 0;
}



/* Unimplemented functions  */

HENHMETAFILE
WINAPI
CopyEnhMetaFileW(
    HENHMETAFILE    hemfSrc,
    LPCWSTR     lpszFile)
{
    UNIMPLEMENTED;
    return 0;
}


HENHMETAFILE
WINAPI
GetEnhMetaFileW(
    LPCWSTR lpszMetaFile)
{
    UNIMPLEMENTED;
    return 0;
}


UINT
WINAPI
GetEnhMetaFileDescriptionW(
    HENHMETAFILE    hemf,
    UINT        cchBuffer,
    LPWSTR      lpszDescription)
{
    UNIMPLEMENTED;
    return 0;
}


HDC
WINAPI
CreateEnhMetaFileW(
    HDC  hdcRef,
    LPCWSTR  lpFileName,
    LPCRECT  lpRect,
    LPCWSTR  lpDescription)
{
    UNIMPLEMENTED;
    return 0;
}