init.c

来自「Wine-20031016」· C语言 代码 · 共 588 行 · 第 1/2 页

    /* Construct the end of metafile record - this is documented
     * in SDK Knowledgebase Q99334.
     */

    if (!MFDRV_MetaParam0(dc->physDev, META_EOF))
    {
        MFDRV_DeleteDC( dc->physDev );
	return 0;
    }

    if (physDev->mh->mtType == METAFILE_DISK)  /* disk based metafile */
    {
        if (SetFilePointer(physDev->hFile, 0, NULL, FILE_BEGIN) != 0) {
            MFDRV_DeleteDC( dc->physDev );
            return 0;
        }

	physDev->mh->mtType = METAFILE_MEMORY; /* This is what windows does */
        if (!WriteFile(physDev->hFile, (LPSTR)physDev->mh,
                       sizeof(*physDev->mh), NULL, NULL)) {
            MFDRV_DeleteDC( dc->physDev );
            return 0;
        }
        CloseHandle(physDev->hFile);
	physDev->mh->mtType = METAFILE_DISK;
    }

    return dc;
}

/******************************************************************
 *	     CloseMetaFile     (GDI.126)
 */
HMETAFILE16 WINAPI CloseMetaFile16(
				   HDC16 hdc /* [in] Metafile DC to close */
)
{
    HMETAFILE16 hmf;
    METAFILEDRV_PDEVICE *physDev;
    DC *dc = MFDRV_CloseMetaFile(HDC_32(hdc));
    if (!dc) return 0;
    physDev = (METAFILEDRV_PDEVICE *)dc->physDev;

    /* Now allocate a global handle for the metafile */

    hmf = MF_Create_HMETAFILE16( physDev->mh );

    physDev->mh = NULL;  /* So it won't be deleted */
    MFDRV_DeleteDC( dc->physDev );
    return hmf;
}

/******************************************************************
 *	     CloseMetaFile   (GDI32.@)
 *
 *  Stop recording graphics operations in metafile associated with
 *  hdc and retrieve metafile.
 *
 * RETURNS
 *  Handle of newly created metafile on success, NULL on failure.
 */
HMETAFILE WINAPI CloseMetaFile(
				   HDC hdc /* [in] Metafile DC to close */
)
{
    HMETAFILE hmf;
    METAFILEDRV_PDEVICE *physDev;
    DC *dc = MFDRV_CloseMetaFile(hdc);
    if (!dc) return 0;
    physDev = (METAFILEDRV_PDEVICE *)dc->physDev;

    /* Now allocate a global handle for the metafile */

    hmf = MF_Create_HMETAFILE( physDev->mh );

    physDev->mh = NULL;  /* So it won't be deleted */
    MFDRV_DeleteDC( dc->physDev );
    return hmf;
}


/******************************************************************
 *         MFDRV_WriteRecord
 *
 * Warning: this function can change the pointer to the metafile header.
 */
BOOL MFDRV_WriteRecord( PHYSDEV dev, METARECORD *mr, DWORD rlen)
{
    DWORD len, size;
    METAHEADER *mh;
    METAFILEDRV_PDEVICE *physDev = (METAFILEDRV_PDEVICE *)dev;

    switch(physDev->mh->mtType)
    {
    case METAFILE_MEMORY:
	len = physDev->mh->mtSize * 2 + rlen;
	/* reallocate memory if needed */
        size = HeapSize( GetProcessHeap(), 0, physDev->mh );
        if (len > size)
        {
            /*expand size*/
            size += size / 2 + rlen;
            mh = HeapReAlloc( GetProcessHeap(), 0, physDev->mh, size);
            if (!mh) return FALSE;
            physDev->mh = mh;
            TRACE("Reallocated metafile: new size is %ld\n",size);
        }
	memcpy((WORD *)physDev->mh + physDev->mh->mtSize, mr, rlen);
        break;
    case METAFILE_DISK:
        TRACE("Writing record to disk\n");
	if (!WriteFile(physDev->hFile, (char *)mr, rlen, NULL, NULL))
	    return FALSE;
        break;
    default:
        ERR("Unknown metafile type %d\n", physDev->mh->mtType );
        return FALSE;
    }

    physDev->mh->mtSize += rlen / 2;
    physDev->mh->mtMaxRecord = max(physDev->mh->mtMaxRecord, rlen / 2);
    return TRUE;
}


/******************************************************************
 *         MFDRV_MetaParam0
 */

BOOL MFDRV_MetaParam0(PHYSDEV dev, short func)
{
    char buffer[8];
    METARECORD *mr = (METARECORD *)&buffer;

    mr->rdSize = 3;
    mr->rdFunction = func;
    return MFDRV_WriteRecord( dev, mr, mr->rdSize * 2);
}


/******************************************************************
 *         MFDRV_MetaParam1
 */
BOOL MFDRV_MetaParam1(PHYSDEV dev, short func, short param1)
{
    char buffer[8];
    METARECORD *mr = (METARECORD *)&buffer;

    mr->rdSize = 4;
    mr->rdFunction = func;
    *(mr->rdParm) = param1;
    return MFDRV_WriteRecord( dev, mr, mr->rdSize * 2);
}


/******************************************************************
 *         MFDRV_MetaParam2
 */
BOOL MFDRV_MetaParam2(PHYSDEV dev, short func, short param1, short param2)
{
    char buffer[10];
    METARECORD *mr = (METARECORD *)&buffer;

    mr->rdSize = 5;
    mr->rdFunction = func;
    *(mr->rdParm) = param2;
    *(mr->rdParm + 1) = param1;
    return MFDRV_WriteRecord( dev, mr, mr->rdSize * 2);
}


/******************************************************************
 *         MFDRV_MetaParam4
 */

BOOL MFDRV_MetaParam4(PHYSDEV dev, short func, short param1, short param2,
		      short param3, short param4)
{
    char buffer[14];
    METARECORD *mr = (METARECORD *)&buffer;

    mr->rdSize = 7;
    mr->rdFunction = func;
    *(mr->rdParm) = param4;
    *(mr->rdParm + 1) = param3;
    *(mr->rdParm + 2) = param2;
    *(mr->rdParm + 3) = param1;
    return MFDRV_WriteRecord( dev, mr, mr->rdSize * 2);
}


/******************************************************************
 *         MFDRV_MetaParam6
 */

BOOL MFDRV_MetaParam6(PHYSDEV dev, short func, short param1, short param2,
		      short param3, short param4, short param5, short param6)
{
    char buffer[18];
    METARECORD *mr = (METARECORD *)&buffer;

    mr->rdSize = 9;
    mr->rdFunction = func;
    *(mr->rdParm) = param6;
    *(mr->rdParm + 1) = param5;
    *(mr->rdParm + 2) = param4;
    *(mr->rdParm + 3) = param3;
    *(mr->rdParm + 4) = param2;
    *(mr->rdParm + 5) = param1;
    return MFDRV_WriteRecord( dev, mr, mr->rdSize * 2);
}


/******************************************************************
 *         MFDRV_MetaParam8
 */
BOOL MFDRV_MetaParam8(PHYSDEV dev, short func, short param1, short param2,
		      short param3, short param4, short param5,
		      short param6, short param7, short param8)
{
    char buffer[22];
    METARECORD *mr = (METARECORD *)&buffer;

    mr->rdSize = 11;
    mr->rdFunction = func;
    *(mr->rdParm) = param8;
    *(mr->rdParm + 1) = param7;
    *(mr->rdParm + 2) = param6;
    *(mr->rdParm + 3) = param5;
    *(mr->rdParm + 4) = param4;
    *(mr->rdParm + 5) = param3;
    *(mr->rdParm + 6) = param2;
    *(mr->rdParm + 7) = param1;
    return MFDRV_WriteRecord( dev, mr, mr->rdSize * 2);
}


/******************************************************************
 *         MFDRV_AddHandleDC
 *
 * Note: this function assumes that we never delete objects.
 * If we do someday, we'll need to maintain a table to re-use deleted
 * handles.
 */
int MFDRV_AddHandleDC( PHYSDEV dev )
{
    METAFILEDRV_PDEVICE *physDev = (METAFILEDRV_PDEVICE *)dev;
    physDev->mh->mtNoObjects++;
    return physDev->nextHandle++;
}

/**********************************************************************
 *           MFDRV_ExtEscape
 */
INT MFDRV_ExtEscape( PHYSDEV dev, INT nEscape, INT cbInput, LPCVOID in_data,
                     INT cbOutput, LPVOID out_data )
{
    METARECORD *mr;
    DWORD len;
    INT ret;

    len = sizeof(*mr) + sizeof(WORD) + ((cbInput + 1) & ~1);
    mr = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, len);
    mr->rdSize = len / 2;
    mr->rdFunction = META_ESCAPE;
    mr->rdParm[0] = nEscape;
    mr->rdParm[1] = cbInput;
    memcpy(&(mr->rdParm[2]), in_data, cbInput);
    ret = MFDRV_WriteRecord( dev, mr, len);
    HeapFree(GetProcessHeap(), 0, mr);
    return ret;
}


/******************************************************************
 *         MFDRV_GetDeviceCaps
 *
 *A very simple implementation that returns DT_METAFILE
 */
INT MFDRV_GetDeviceCaps(PHYSDEV dev, INT cap)
{
    switch(cap)
    {
    case TECHNOLOGY:
        return DT_METAFILE;
    case TEXTCAPS:
        return 0;
    default:
        TRACE(" unsupported capability %d, will return 0\n", cap );
    }
    return 0;
}