99 lines
2.2 KiB
C++
99 lines
2.2 KiB
C++
/*++
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Copyright (c) 2000-2001 Microsoft Corporation
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Module Name:
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PrinterJTDevmode.cpp
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Abstract:
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This is a shim that can be applied to those applications who
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assumed false upper-limit on the devmode size. With the support
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of job ticket, Longhorn+ inbox printer drivers' devmode could
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be over those upper-limits and therefore may cause those apps
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to crash. What this shim does is to set a private flag for the
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DocumentPropertiesA API. Our Longhorn inbox printer drivers
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recognize this flag and know not to add the job ticket expansion
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block in returned devmode.
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History:
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10/29/2001 fengy Created
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--*/
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#include "precomp.h"
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IMPLEMENT_SHIM_BEGIN(PrinterJTDevmode)
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#include "ShimHookMacro.h"
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APIHOOK_ENUM_BEGIN
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APIHOOK_ENUM_ENTRY(DocumentPropertiesA)
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APIHOOK_ENUM_END
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#define DM_NOJTEXP_SHIM 0x80000000
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/*++
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This stub function intercepts all calls to DocumentPropertiesA
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and sets the private fMode flag DM_NOJTEXP_SHIM properly to
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retrieve non-JT-expanded devmode.
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--*/
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LONG
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APIHOOK(DocumentPropertiesA)(
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HWND hWnd,
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HANDLE hPrinter,
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LPSTR pDeviceName,
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PDEVMODEA pDevModeOutput,
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PDEVMODEA pDevModeInput,
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DWORD fMode
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)
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{
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DWORD fModeShim;
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LONG lRet;
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//
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// SDK says if fMode is zero, DocumentProperties returns
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// the number of bytes required by the printer driver's
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// DEVMODE data structure. So we shouldn't set the private
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// flag when fMode is zero (because drivers may check
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// for fMode == 0). When fMode is not zero, it contains
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// DM_xxx flags, then it's safe to set the private flag.
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//
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if (fMode == 0 || pDevModeOutput == NULL)
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{
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fModeShim = fMode;
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}
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else
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{
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fModeShim = fMode | DM_NOJTEXP_SHIM;
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DPFN(eDbgLevelInfo, "DocumentPropertiesA fModeShim=%X", fModeShim);
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}
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lRet = ORIGINAL_API(DocumentPropertiesA)(
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hWnd,
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hPrinter,
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pDeviceName,
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pDevModeOutput,
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pDevModeInput,
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fModeShim
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);
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return lRet;
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}
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/*++
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Register hooked functions
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--*/
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HOOK_BEGIN
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APIHOOK_ENTRY(WINSPOOL.DRV, DocumentPropertiesA);
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HOOK_END
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IMPLEMENT_SHIM_END
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