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// THIS CODE AND INFORMATION IS PROVIDED "AS IS" WITHOUT WARRANTY OF
// ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO
// THE IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A
// PARTICULAR PURPOSE.
//
// Copyright 1998 - 2003 Microsoft Corporation. All Rights Reserved.
//
// FILE: Devmode.cpp
//
//
// PURPOSE: Helper functions for manipulating the DEVMODE. These are commonly
// shared by UI & rendering modules
//
#include "precomp.h"
#include "bitmap.h"
#include "debug.h"
#include "devmode.h"
// This indicates to Prefast that this is a usermode driver file.
_Analysis_mode_(_Analysis_code_type_user_driver_);
BOOL bConvertOEMDevmode(
PCOEMDEV pOEMDevIn,
POEMDEV pOEMDevOut
)
/*++
Routine Description:
Converts private DEVMODE members to the
current version.
Arguments:
pOEMDevIn - pointer to OEM private devmode
pOEMDevOut - pointer to OEM private devmode
Return Value:
TRUE if successful, FALSE if there is an error
--*/
{
if( (NULL == pOEMDevIn)
||
(NULL == pOEMDevOut)
)
{
ERR("ConvertOEMDevmode() invalid parameters.\r\n");
return FALSE;
}
// Check OEM Signature, if it doesn't match ours,
// then just assume DMIn is bad and use defaults.
if(pOEMDevIn->dmOEMExtra.dwSignature == pOEMDevOut->dmOEMExtra.dwSignature)
{
// Set the devmode defaults so that anything the isn't copied over will
// be set to the default value.
pOEMDevOut->dwDriverData = 0;
// Copy the old structure in to the new using which ever size is the smaller.
// Devmode maybe from newer Devmode (not likely since there is only one), or
// Devmode maybe a newer Devmode, in which case it maybe larger,
// but the first part of the structure should be the same.
// DESIGN ASSUMPTION: the private DEVMODE structure only gets added to;
// the fields that are in the DEVMODE never change only new fields get added to the end.
memcpy(pOEMDevOut, pOEMDevIn, __min(pOEMDevOut->dmOEMExtra.dwSize, pOEMDevIn->dmOEMExtra.dwSize));
// Re-fill in the size and version fields to indicated
// that the DEVMODE is the current private DEVMODE version.
pOEMDevOut->dmOEMExtra.dwSize = sizeof(OEMDEV);
pOEMDevOut->dmOEMExtra.dwVersion = OEM_VERSION;
}
else
{
// Don't know what the input DEVMODE is, so just use defaults.
pOEMDevOut->dmOEMExtra.dwSize = sizeof(OEMDEV);
pOEMDevOut->dmOEMExtra.dwSignature = OEM_SIGNATURE;
pOEMDevOut->dmOEMExtra.dwVersion = OEM_VERSION;
pOEMDevOut->dwDriverData = 0;
}
return TRUE;
}
BOOL bMakeOEMDevmodeValid(
POEMDEV pOEMDevmode
)
/*++
Routine Description:
Ensures that private OEM devmode members are valid.
Arguments:
pOEMDevmode - pointer to OEM private devmode
Return Value:
TRUE if successful, FALSE if there is an error
--*/
{
if(NULL == pOEMDevmode)
{
return FALSE;
}
// ASSUMPTION: pOEMDevmode is large enough to contain OEMDEV structure.
// Make sure that dmOEMExtra indicates the current OEMDEV structure.
pOEMDevmode->dmOEMExtra.dwSize = sizeof(OEMDEV);
pOEMDevmode->dmOEMExtra.dwSignature = OEM_SIGNATURE;
pOEMDevmode->dmOEMExtra.dwVersion = OEM_VERSION;
// Set driver data.
pOEMDevmode->dwDriverData = 0;
return TRUE;
}
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