/*++

Copyright (c) 1996-1998  Microsoft Corporation

Module Name:

    cmdcb.c

Abstract:

    Implementation of GPD command callback for "test.gpd":
        OEMCommandCallback

Environment:

    Windows NT Unidrv driver

Revision History:

    04/07/97 -zhanw-
        Created it.

--*/

#include "pdev.h"

//
// command callback ID's for "test.gpd"
//
#define CMDCB_SELECTPORTRAIT    1
#define CMDCB_SELECTLANDSCAPE   2
#define CMDCB_SENDBLOCKDATA     3


static  int
iDwtoA( LPSTR buf, DWORD n )
{
    int     i, j;

    for( i = 0; n; i++ )
    {
        buf[i] = (char)(n % 10 + '0');
        n /= 10;
    }

    /* n was zero */
    if( i == 0 )
        buf[i++] = '0';

    for( j = 0; j < i / 2; j++ )
    {
        int tmp;

        tmp = buf[j];
        buf[j] = buf[i - j - 1];
        buf[i - j - 1] = (char)tmp;
    }

    buf[i] = '\0';

    return i;
}


INT APIENTRY OEMCommandCallback(
    PDEVOBJ pdevobj,
    DWORD   dwCmdCbID,
    DWORD   dwCount,
    PDWORD  pdwParams
    )
{
    DbgPrint(DLLTEXT("OEMCommandCallback() entry.\r\n"));

    //
    // fill in printer commands
    //
    switch (dwCmdCbID)
    {
    case CMDCB_SELECTPORTRAIT:
        //pdevobj->pDrvProcs->DrvWriteSpoolBuf(pdevobj, "\x1B&l0O", 5);
        break;

    case CMDCB_SELECTLANDSCAPE:
        //pdevobj->pDrvProcs->DrvWriteSpoolBuf(pdevobj, "\x1B&l1O", 5);
        break;

    case CMDCB_SENDBLOCKDATA:
    {
        //
        // this command requires one parameter. Compose the string first.
        //
        BYTE    abSBDCmd[16];
        INT     i = 0;

        if (dwCount < 1 || !pdwParams)
            return 0;       // cannot do anything

        abSBDCmd[i++] = '\x1B';
        abSBDCmd[i++] = '*';
        abSBDCmd[i++] = 'b';
        i += iDwtoA(&abSBDCmd[i], *pdwParams);
        abSBDCmd[i++] = 'W';

        pdevobj->pDrvProcs->DrvWriteSpoolBuf(pdevobj, abSBDCmd, i);

        break;
    }
    }
    return 0;
}