Sample Code
Windows Driver Samples/ OEM Printer Customization Plug-in Samples/ C++/ bitmap/ intrface.cpp/
// 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: Intrface.cpp
//
//
// PURPOSE: Interface for User Mode COM Customization DLL.
//
#include "precomp.h"
#include "debug.h"
#include "devmode.h"
#include "bitmap.h"
#include "intrface.h"
// This indicates to Prefast that this is a usermode driver file.
_Analysis_mode_(_Analysis_code_type_user_driver_);
// ==================================================================
// Internal Globals
//
static long g_cComponents; // Count of active components
static long g_cServerLocks; // Count of locks
//
// ==================================================================
// ==================================================================
// The purpose of this array is to inform UNIDRV of the callbacks
// that are implemented in this driver.
//
// Note that there is *NO* order dependency in this array. New
// index values and their corresponding callbacks can be placed
// anywhere within the list as needed.
//
static const DRVFN s_aOemHookFuncs[] =
{
{INDEX_DrvEndDoc, (PFN)OEMEndDoc}
};
////////////////////////////////////////////////////////////////////////////////
//
// COemUni2 body
//
COemUni2::COemUni2()
{
m_cRef = 1;
// Increment COM component count.
InterlockedIncrement(&g_cComponents);
m_pOEMHelp = NULL;
}
COemUni2::~COemUni2()
{
// Make sure that helper interface is released.
if(NULL != m_pOEMHelp)
{
m_pOEMHelp->Release();
m_pOEMHelp = NULL;
}
// If this instance of the object is being deleted, then the reference
// count should be zero.
assert(0 == m_cRef);
}
HRESULT __stdcall
COemUni2::
QueryInterface(
const IID& iid,
void** ppv
)
{
if (iid == IID_IUnknown)
{
*ppv = static_cast<IUnknown*>(this);
}
else if (iid == IID_IPrintOemUni2)
{
*ppv = static_cast<IPrintOemUni2*>(this);
}
else
{
WARNING("COemUni2::QueryInterface NULL. Returning E_NOINTERFACE.\r\n");
*ppv = NULL;
return E_NOINTERFACE;
}
reinterpret_cast<IUnknown*>(*ppv)->AddRef();
return S_OK;
}
ULONG __stdcall
COemUni2::
AddRef(
VOID
)
{
return InterlockedIncrement(&m_cRef);
}
_At_(this, __drv_freesMem(object))
ULONG __stdcall
COemUni2::
Release(
VOID
)
{
ULONG cRef = InterlockedDecrement(&m_cRef);
if (cRef == 0)
{
delete this;
return 0;
}
return cRef;
}
HRESULT __stdcall
COemUni2::
CommandCallback(
PDEVOBJ pdevobj,
DWORD dwCallbackID,
DWORD dwCount,
PDWORD pdwParams,
OUT INT *piResult
)
/*++
Routine Description:
Implementation of IPrintOemUni::CommandCallback
The IPrintOemUni::CommandCallback method is used
to provide dynamically generated printer commands
for Unidrv-supported printers.
Please refer to DDK documentation for more details.
Arguments:
pdevobj - pointer to a DEVOBJ structure.
dwCallbackID - value representing the printer command's
*CallbackID attribute in the printer's generic printer
description (GPD) file.
dwCount - value representing the number of elements
in the array pointed to by pdwParams. Can be 0.
pdwParams - pointer to an array of DWORD-sized parameters
containing values specified by the printer commands
*Params attribute in the printer's GPD file. Can be NULL.
piResult - Receives a method-supplied result value.
Return Value:
S_OK The operation succeeded.
E_FAIL The operation failed.
E_NOTIMPL The method is not implemented.
--*/
{
UNREFERENCED_PARAMETER(pdevobj);
UNREFERENCED_PARAMETER(dwCallbackID);
UNREFERENCED_PARAMETER(dwCount);
UNREFERENCED_PARAMETER(pdwParams);
*piResult = 0;
return S_OK;
}
HRESULT __stdcall
COemUni2::
Compression(
PDEVOBJ pdevobj,
PBYTE pInBuf,
PBYTE pOutBuf,
DWORD dwInLen,
DWORD dwOutLen,
OUT INT *piResult
)
/*++
Routine Description:
Implementation of IPrintOemUni::Compression
The IPrintOemUni::Compression method can be used
with Unidrv-supported printers to provide a customized
bitmap compression method.
Please refer to DDK documentation for more details.
Arguments:
pdevobj - pointer to a DEVOBJ structure.
pInBuf - pointer to input scan line data.
pOutBuf - pointer to an output buffer to receive
compressed scan line data.
dwInLen - length of the input data.
dwOutLen - length of the output buffer.
piResult - Receives a method-supplied result value. If the
operation succeeds, this value should be the number
of compressed bytes, which must not be larger than
the value received for dwOutLen. If an error occurs,
or if the method cannot compress, the result value
should be -1.
Return Value:
S_OK The operation succeeded.
E_FAIL The operation failed.
E_NOTIMPL The method is not implemented.
--*/
{
UNREFERENCED_PARAMETER(pdevobj);
UNREFERENCED_PARAMETER(pInBuf);
UNREFERENCED_PARAMETER(pOutBuf);
UNREFERENCED_PARAMETER(dwInLen);
UNREFERENCED_PARAMETER(dwOutLen);
UNREFERENCED_PARAMETER(piResult);
return E_NOTIMPL;
}
HRESULT __stdcall
COemUni2::
DevMode(
DWORD dwMode,
POEMDMPARAM pOemDMParam
)
/*++
Routine Description:
Implementation of IPrintOemUni::DevMode
The IPrintOemUni::DevMode method, provided by
rendering plug-ins for Unidrv, performs operations
on private DEVMODE members.
A rendering plug-in for Unidrv MUST implement the
IPrintOemUni::DevMode method.
The IPrintOemUni::DevMode method, provided by
rendering plug-ins for Unidrv, performs operations
on private DEVMODE members. When both UI and rendering
plug-ins are present in a driver, this functionality
should be factored out to be common to both modules, and
provide the same behavior.
Please refer to DDK documentation for more details.
Arguments:
dwMode - caller-supplied constant. Refer to the docs
for more information.
pOemDMParam - pointer to an OEMDMPARAM structure.
Return Value:
S_OK The operation succeeded.
E_FAIL The operation failed.
--*/
{
POEMDEV pOEMDevIn;
POEMDEV pOEMDevOut;
// Verify parameters.
if( (NULL == pOemDMParam)
||
( (OEMDM_SIZE != dwMode)
&&
(OEMDM_DEFAULT != dwMode)
&&
(OEMDM_CONVERT != dwMode)
&&
(OEMDM_MERGE != dwMode)
))
{
ERR("DevMode() ERROR_INVALID_PARAMETER.\r\n");
SetLastError(ERROR_INVALID_PARAMETER);
return E_FAIL;
}
// Cast generic (i.e. PVOID) to OEM private devmode pointer type.
pOEMDevIn = (POEMDEV) pOemDMParam->pOEMDMIn;
pOEMDevOut = (POEMDEV) pOemDMParam->pOEMDMOut;
switch(dwMode)
{
case OEMDM_SIZE:
pOemDMParam->cbBufSize = sizeof(OEMDEV);
break;
case OEMDM_DEFAULT:
pOEMDevOut->dmOEMExtra.dwSize = sizeof(OEMDEV);
pOEMDevOut->dmOEMExtra.dwSignature = OEM_SIGNATURE;
pOEMDevOut->dmOEMExtra.dwVersion = OEM_VERSION;
pOEMDevOut->dwDriverData = 0;
break;
case OEMDM_CONVERT:
bConvertOEMDevmode(pOEMDevIn, pOEMDevOut);
break;
case OEMDM_MERGE:
bConvertOEMDevmode(pOEMDevIn, pOEMDevOut);
bMakeOEMDevmodeValid(pOEMDevOut);
break;
}
return S_OK;
}
HRESULT __stdcall
COemUni2::
DisableDriver(
VOID
)
/*++
Routine Description:
Implementation of IPrintOemUni::DisableDriver
The IPrintOemUni::DisableDriver method allows
a rendering plug-in for Unidrv to free resources
that were allocated by the plug-in's
IPrintOemUni::EnableDriver method.
A rendering plug-in for Unidrv MUST implement the
IPrintOemUni::DisableDriver method.
The IPrintOemUni::DisableDriver method allows a rendering
plug-in for Unidrv to free resources that were allocated by the
plug-in's IPrintOemUni::EnableDriver method. This is the last
IPrintOemUni interface method that is called before the rendering
plug-in is unloaded.
Please refer to DDK documentation for more details.
Arguments:
VOID
Return Value:
S_OK The operation succeeded.
E_FAIL The operation failed.
--*/
{
// Release reference to Printer Driver's interface.
//
if (this->m_pOEMHelp)
{
this->m_pOEMHelp->Release();
this->m_pOEMHelp = NULL;
}
return S_OK;
}
HRESULT __stdcall
COemUni2::
DisablePDEV(
PDEVOBJ pdevobj
)
/*++
Routine Description:
Implementation of IPrintOemUni::DisablePDEV
The IPrintOemUni::DisablePDEV method allows a rendering
plug-in for Unidrv to delete the private PDEV structure that
was allocated by its IPrintOemUni::EnablePDEV method.
A rendering plug-in for Unidrv MUST implement the
IPrintOemUni::DisablePDEV method.
The IPrintOemUni::DisablePDEV method performs the same types of
operations as the DrvDisablePDEV function. Its purpose is to allow a
rendering plug-in to delete the private PDEV structure that is pointed
to by the DEVOBJ structure's pdevOEM member. This PDEV structure
is one that was allocated by the plug-in's IPrintOemUni::EnablePDEV method.
Please refer to DDK documentation for more details.
Arguments:
pdevobj - pointer to a DEVOBJ structure.
Return Value:
S_OK The operation succeeded.
E_FAIL The operation failed.
--*/
{
// Release our COemPDEV instance created by the call to
// EnablePDEV.
//
POEMPDEV pOemPDEV = (POEMPDEV)pdevobj->pdevOEM;
delete pOemPDEV;
pOemPDEV = NULL;
return S_OK;
}
HRESULT __stdcall
COemUni2::
DownloadCharGlyph(
PDEVOBJ pdevobj,
PUNIFONTOBJ pUFObj,
HGLYPH hGlyph,
PDWORD pdwWidth,
OUT DWORD *pdwResult
)
/*++
Routine Description:
Implementation of IPrintOemUni::DownloadCharGlyph
The IPrintOemUni::DownloadCharGlyph method enables a
rendering plug-in for Unidrv to send a character glyph for
a specified soft font to the printer.
Please refer to DDK documentation for more details.
Arguments:
pdevobj - pointer to a DEVOBJ structure.
pUFObj - pointer to a UNIFONTOBJ structure.
hGlyph - glyph handle.
pdwWidth - pointer to receive the method-supplied width of the character.
pdwResult - Receives a method-supplied value representing the amount
of printer memory, in bytes, required to store the character glyph.
If the operation fails, the returned value should be zero.
Return Value:
S_OK The operation succeeded.
E_FAIL The operation failed.
E_NOTIMPL The method is not implemented.
--*/
{
UNREFERENCED_PARAMETER(pdevobj);
UNREFERENCED_PARAMETER(pUFObj);
UNREFERENCED_PARAMETER(hGlyph);
UNREFERENCED_PARAMETER(pdwWidth);
UNREFERENCED_PARAMETER(pdwResult);
return E_NOTIMPL;
}
HRESULT __stdcall
COemUni2::
DownloadFontHeader(
PDEVOBJ pdevobj,
PUNIFONTOBJ pUFObj,
OUT DWORD *pdwResult
)
/*++
Routine Description:
Implementation of IPrintOemUni::DownloadFontHeader
The IPrintOemUni::DownloadFontHeader method allows a
rendering plug-in for Unidrv to send a font's header
information to a printer.
Please refer to DDK documentation for more details.
Arguments:
pdevobj - pointer to a DEVOBJ structure.
pUFObj - pointer to a UNIFONTOBJ structure.
pdwResult - Receives a method-supplied value representing the amount
of printer memory, in bytes, required to store the font header
information. If the operation fails, the returned value should be zero.
Return Value:
S_OK The operation succeeded.
E_FAIL The operation failed.
E_NOTIMPL The method is not implemented.
--*/
{
UNREFERENCED_PARAMETER(pdevobj);
UNREFERENCED_PARAMETER(pUFObj);
UNREFERENCED_PARAMETER(pdwResult);
return E_NOTIMPL;
}
HRESULT __stdcall
COemUni2::
DriverDMS(
PVOID pDevObj,
PVOID pBuffer,
DWORD cbSize,
PDWORD pcbNeeded
)
/*++
Routine Description:
Implementation of IPrintOemUni::DriverDMS
The IPrintOemUni::DriverDMS method allows a rendering
plug-in for Unidrv to indicate that it uses a device-managed
drawing surface instead of the default GDI-managed surface.
A rendering plug-in for Unidrv MUST implement the
IPrintOemUni::DriverDMS method.
Please refer to DDK documentation for more details. For general info
on device managed surfaces and how to handle them, please refer to
the section titled "Handling Device-Managed Surfaces".
Arguments:
pDevObj - pointer to a DEVOBJ structure.
pBuffer - pointer to a buffer to receive method-specified flags.
cbSize - size, in bytes, of the buffer pointed to by pBuffer.
pcbNeeded - pointer to a location to receive the required
minimum pBuffer size.
Return Value:
S_OK The operation succeeded.
E_FAIL The operation failed.
--*/
{
UNREFERENCED_PARAMETER(pDevObj);
UNREFERENCED_PARAMETER(pBuffer);
UNREFERENCED_PARAMETER(cbSize);
UNREFERENCED_PARAMETER(pcbNeeded);
return E_NOTIMPL;
}
HRESULT __stdcall
COemUni2::
EnableDriver(
DWORD dwDriverVersion,
DWORD cbSize,
PDRVENABLEDATA pded
)
/*++
Routine Description:
Implementation of IPrintOemUni::EnableDriver
The IPrintOemUni::EnableDriver method allows a rendering
plug-in for Unidrv to hook out some graphics DDI functions.
A rendering plug-in for Unidrv MUST implement the
IPrintOemUni::EnableDriver method.
The IPrintOemUni::EnableDriver method allows a rendering
plug-in to perform the same types of operations as the
DrvEnableDriver function. Like the DrvEnableDriver function,
the IPrintOemUni::EnableDriver method is responsible for
providing addresses of internally supported graphics DDI functions,
or DDI hook functions.
The method should fill the supplied DRVENABLEDATA structure
and allocate an array of DRVFN structures. It should fill the
array with pointers to hooking functions, along with winddi.h-defined
index values that identify the hooked out graphics DDI functions.
Please refer to DDK documentation for more details.
Arguments:
DriverVersion - interface version number. This value is
defined by PRINTER_OEMINTF_VERSION, in printoem.h.
cbSize - size, in bytes, of the structure pointed to by pded.
pded - pointer to a DRVENABLEDATA structure.
Return Value:
S_OK The operation succeeded.
E_FAIL The operation failed.
--*/
{
UNREFERENCED_PARAMETER(dwDriverVersion);
UNREFERENCED_PARAMETER(cbSize);
// We need to return the DDI functions that have been hooked
// in pded. Here we fill out the fields in pded.
//
pded->iDriverVersion = PRINTER_OEMINTF_VERSION;
pded->c = _countof(s_aOemHookFuncs);
pded->pdrvfn = (DRVFN *) s_aOemHookFuncs;
// Even if nothing is done, need to return S_OK so
// that DisableDriver() will be called, which releases
// the reference to the Printer Driver's interface.
//
return S_OK;
}
HRESULT __stdcall
COemUni2::
EnablePDEV(
PDEVOBJ pdevobj,
_In_ PWSTR pPrinterName,
ULONG cPatterns,
HSURF *phsurfPatterns,
ULONG cjGdiInfo,
GDIINFO *pGdiInfo,
ULONG cjDevInfo,
DEVINFO *pDevInfo,
DRVENABLEDATA *pded,
OUT PDEVOEM *pDevOem
)
/*++
Routine Description:
Implementation of IPrintOemUni::EnablePDEV
The IPrintOemUni::EnablePDEV method allows a rendering
plug-in for Unidrv to create its own PDEV structure.
A rendering plug-in for Unidrv MUST implement the
IPrintOemUni::EnablePDEV method.
The IPrintOemUni::EnablePDEV method performs the same types
of operations as the DrvEnablePDEV function that is exported
by a printer graphics DLL. Its purpose is to allow a rendering
plug-in to create its own PDEV structure. For more information
about PDEV structures, see "Customized PDEV Structures" in the DDK docs.
Please refer to DDK documentation for more details.
Arguments:
pdevobj - pointer to a DEVOBJ structure.
pPrinterName - pointer to a text string representing the
logical address of the printer.
cPatterns - value representing the number of HSURF-typed
surface handles contained in the buffer pointed to by
phsurfPatterns.
phsurfPatterns - pointer to a buffer that is large enough to
contain cPatterns number of HSURF-typed surface handles.
The handles represent surface fill patterns.
cjGdiInfo - value representing the size of the structure pointed
to by pGdiInfo.
pGdiInfo - pointer to a GDIINFO structure.
cjDevInfo - value representing the size of the structure pointed
to by pDevInfo.
pDevInfo - pointer to a DEVINFO structure.
pded - pointer to a DRVENABLEDATA structure containing the
addresses of the printer driver's graphics DDI hooking functions.
pDevOem - Receives a method-supplied pointer to a private PDEV structure.
Return Value:
S_OK The operation succeeded.
E_FAIL The operation failed.
If the operation fails, the method should call SetLastError to set an error code.
--*/
{
UNREFERENCED_PARAMETER(pdevobj);
UNREFERENCED_PARAMETER(pPrinterName);
UNREFERENCED_PARAMETER(cPatterns);
UNREFERENCED_PARAMETER(phsurfPatterns);
UNREFERENCED_PARAMETER(cjGdiInfo);
UNREFERENCED_PARAMETER(cjDevInfo);
// Allocate an instance of our private PDEV.
//
POEMPDEV pOemPDEV = new COemPDEV();
if (NULL == pOemPDEV)
{
return E_FAIL;
}
pOemPDEV->InitializeDDITable(pded);
// Initializing private oempdev stuff
//
pOemPDEV->bHeadersFilled = FALSE;
pOemPDEV->bColorTable = FALSE;
pOemPDEV->cbHeaderOffBits = sizeof(BITMAPFILEHEADER) + sizeof(BITMAPINFOHEADER);
pOemPDEV->bmInfoHeader.biHeight = 0;
pOemPDEV->bmInfoHeader.biSizeImage = 0;
pOemPDEV->pBufStart = NULL;
pOemPDEV->dwBufSize = 0;
// We create a BGR palette for 24bpp so that we can avoid color byte order manipulation
//
if (pGdiInfo->cBitsPixel == 24)
pDevInfo->hpalDefault = EngCreatePalette(PAL_BGR, 0, 0, 0, 0, 0);
// Store the handle to the default palette so that we can fill the color table later
//
pOemPDEV->hpalDefault = pDevInfo->hpalDefault;
*pDevOem = pOemPDEV;
return S_OK;
}
HRESULT __stdcall
COemUni2::
FilterGraphics(
PDEVOBJ pdevobj,
PBYTE pBuf,
DWORD dwLen
)
/*++
Routine Description:
Implementation of IPrintOemUni::FilterGraphics
The IPrintOemUni::FilterGraphics method can be used with
Unidrv-supported printers to modify scan line data and send
it to the spooler.
Please refer to DDK documentation for more details.
Arguments:
pdevobj - pointer to a DEVOBJ structure.
pBuf - pointer to a buffer containing scan line data to be printed.
dwLen - value representing the length, in bytes, of the data
pointed to by pBuf.
Return Value:
S_OK The operation succeeded.
E_FAIL The operation failed.
E_NOTIMPL The method is not implemented.
--*/
{
DWORD dwResult;
m_pOEMHelp->DrvWriteSpoolBuf(pdevobj, pBuf, dwLen, &dwResult);
if (dwResult == dwLen)
return S_OK;
else
return S_FALSE;
}
HRESULT __stdcall
COemUni2::
GetImplementedMethod(
_In_ PSTR pMethodName
)
/*++
Routine Description:
Implementation of IPrintOemUni::GetImplementedMethod
The IPrintOemUni::GetImplementedMethod method is used by
Unidrv to determine which IPrintOemUni interface methods
have been implemented by a rendering plug-in.
A rendering plug-in for Unidrv MUST implement the
IPrintOemUni::GetImplemented method.
Please refer to DDK documentation for more details.
Arguments:
pMethodName - pointer to a string representing the name of an
IPrintOemUni interface method, such as "ImageProcessing"
for IPrintOemUni::ImageProcessing or "FilterGraphics" for
IPrintOemUni::FilterGraphics.
Return Value:
S_OK The operation succeeded (the specified method is implemented).
S_FALSE The operation failed (the specified method is not implemented).
--*/
{
HRESULT Result = S_FALSE;
// Unidrv only calls GetImplementedMethod for optional
// methods. The required methods are assumed to be
// supported.
// Return S_OK for supported function (i.e. implemented),
// and S_FALSE for functions that aren't supported (i.e. not implemented).
switch (*pMethodName)
{
case 'C':
if (!strcmp(NAME_CommandCallback, pMethodName))
{
Result = S_OK;
}
break;
case 'F':
if (!strcmp(NAME_FilterGraphics, pMethodName))
{
Result = S_OK;
}
break;
case 'I':
if (!strcmp(NAME_ImageProcessing, pMethodName))
{
Result = S_OK;
}
break;
}
return Result;
}
HRESULT __stdcall
COemUni2::
GetInfo(
DWORD dwMode,
PVOID pBuffer,
DWORD cbSize,
PDWORD pcbNeeded
)
/*++
Routine Description:
Implementation of IPrintOemUni::GetInfo
A rendering plug-in's IPrintOemUni::GetInfo method returns
identification information.
A rendering plug-in for Unidrv MUST implement the
IPrintOemUni::GetInfo method.
Please refer to DDK documentation for more details.
Arguments:
dwMode - Contains one of the following caller-supplied integer constants.
OEMGI_GETSIGNATURE - The method must return a unique four-byte
identification signature. The plug-in must also place this signature
in OPTITEM structures, as described in the description of the
OEMCUIPPARAM. structure's pOEMOptItems member.
OEMGI_GETVERSION - The method must return the user interface
plug-in's version number as a DWORD. The version format is
developer-defined.
pBuffer - pointer to memory allocated to receive the information specified
by dwInfo.
cbSize - size of the buffer pointed to by pBuffer.
pcbNeeded - pointer to a location to receive the number of bytes written
into the buffer pointed to by pBuffer.
Return Value:
S_OK The operation succeeded (the specified method is implemented).
S_FALSE The operation failed (the specified method is not implemented).
--*/
{
PWSTR pszTag = L"COemUni2::GetInfo entry.";
switch(dwMode)
{
case OEMGI_GETSIGNATURE: pszTag = L"COemUni2::GetInfo entry. [OEMGI_GETSIGNATURE]"; break;
case OEMGI_GETVERSION: pszTag = L"COemUni2::GetInfo entry. [OEMGI_GETVERSION]"; break;
}
// Validate parameters.
if( (NULL == pcbNeeded)
||
( (OEMGI_GETSIGNATURE != dwMode)
&&
(OEMGI_GETVERSION != dwMode) ) )
{
WARNING("COemUni2::GetInfo() exit pcbNeeded is NULL! ERROR_INVALID_PARAMETER.\r\n");
SetLastError(ERROR_INVALID_PARAMETER);
return E_FAIL;
}
// Set expected buffer size.
*pcbNeeded = sizeof(DWORD);
// Check buffer size is sufficient. If not, return error, and also ensure that
// the required buffer size is provided to the caller.
if((cbSize < *pcbNeeded) || (NULL == pBuffer))
{
SetLastError(ERROR_INSUFFICIENT_BUFFER);
return E_FAIL;
}
switch(dwMode)
{
// OEM DLL Signature
case OEMGI_GETSIGNATURE:
*(PDWORD)pBuffer = OEM_SIGNATURE;
break;
// OEM DLL version
case OEMGI_GETVERSION:
*(PDWORD)pBuffer = OEM_VERSION;
break;
// dwMode not supported.
default:
// Set written bytes to zero since nothing was written.
WARNING("COemUni2::GetInfo() exit mode not supported.\r\n");
*pcbNeeded = 0;
SetLastError(ERROR_NOT_SUPPORTED);
return E_FAIL;
}
return S_OK;
}
HRESULT __stdcall
COemUni2::
HalftonePattern(
PDEVOBJ pdevobj,
PBYTE pHTPattern,
DWORD dwHTPatternX,
DWORD dwHTPatternY,
DWORD dwHTNumPatterns,
DWORD dwCallbackID,
PBYTE pResource,
DWORD dwResourceSize
)
/*++
Routine Description:
Implementation of IPrintOemUni::HalftonePattern
The IPrintOemUni::HalftonePattern method can be used with
Unidrv-supported printers to create or modify a halftone
pattern before it is used in a halftoning operation.
Please refer to DDK documentation for more details.
Arguments:
pdevobj - pointer to a DEVOBJ structure.
pHTPattern - pointer to a buffer to receive the method-supplied
halftone pattern. Buffer size, in bytes, is:
(((dwHTPatternX * dwHTPatternY) + 3)/4) * 4 * dwHTNumPatterns.
dwHTPatternX - length, in pixels, of the halftone pattern, as specified
by the GPD file's *HTPatternSize attribute.
dwHTPatternY - height, in pixels, of the halftone pattern, as specified
by the GPD file's *HTPatternSize attribute.
dwHTNumPatterns - number of patterns, as specified by the GPD file's
*HTNumPatterns attribute. This can be 1 or 3.
dwCallbackID - value identifying the halftone method, as specified by
the GPD file's *HTCallbackID attribute.
pResource - pointer to a buffer containing a halftone pattern, as
specified by the GPD file's *rcHTPatternID attribute. This can be NULL.
dwResourceSize - size of the halftone pattern contained in the buffer
pointed to by pResource. This is zero if pResource is NULL.
Return Value:
S_OK The operation succeeded.
E_FAIL The operation failed.
E_NOTIMPL The method is not implemented.
--*/
{
UNREFERENCED_PARAMETER(pdevobj);
UNREFERENCED_PARAMETER(pHTPattern);
UNREFERENCED_PARAMETER(dwHTPatternX);
UNREFERENCED_PARAMETER(dwHTPatternY);
UNREFERENCED_PARAMETER(dwHTNumPatterns);
UNREFERENCED_PARAMETER(dwCallbackID);
UNREFERENCED_PARAMETER(pResource);
UNREFERENCED_PARAMETER(dwResourceSize);
return E_NOTIMPL;
}
HRESULT __stdcall
COemUni2::
ImageProcessing(
PDEVOBJ pdevobj,
PBYTE pSrcBitmap,
PBITMAPINFOHEADER pBitmapInfoHeader,
PBYTE pColorTable,
DWORD dwCallbackID,
PIPPARAMS pIPParams,
OUT PBYTE *ppbResult
)
/*++
Routine Description:
Implementation of IPrintOemUni::ImageProcessing
The IPrintOemUni::ImageProcessing method can be used with
Unidrv-supported printers to modify image bitmap data, in order
to perform color formatting or halftoning. The method can return
the modified bitmap to Unidrv or send it directly to the print spooler.
Please refer to DDK documentation for more details.
The algorithm for this particular implementation of ImageProcessing is as follows.
- If headers have not been filled as yet, fill them.
- We fill out only the info header and the color table here. The file header is filled
out in OEMEndDoc.
- The height and image size in the bitmap info header are updated every time
we enter ImageProcessing.
- Increase the size of the data buffer by the size of the current band.
- Copy over the data from the current band to the buffer.
Arguments:
pdevobj - pointer to a DEVOBJ structure.
pSrcBitmap - pointer to an input device-independent bitmap (DIB).
pBitmapInfoHeader - pointer to a BITMAPINFOHEADER structure
that describes the bitmap pointed to by pSrcBitmap.
pColorTable - pointer to a color table. Used only if the output format is
eight bits per pixel.
dwCallbackID - value assigned to the *IPCallbackID attribute of the
currently selected option for the ColorMode feature.
pIPParams - pointer to an IPPARAMS structure.
ppbResult -
If the method returns the converted DIB to Unidrv:
If the conversion succeeds, the method should return a
pointer to a buffer containing the converted DIB.
Otherwise it should return NULL.
If the method sends the converted DIB to the print spooler:
If the operation succeeds, the method should return TRUE.
Otherwise it should return FALSE.
Return Value:
S_OK The operation succeeded.
E_FAIL The operation failed.
E_NOTIMPL The method is not implemented.
--*/
{
UNREFERENCED_PARAMETER(pColorTable);
POEMPDEV pOemPDEV = (POEMPDEV)pdevobj->pdevOEM;
// We want to set ppbResult to NULL in case this function fails and returns E_FAIL
//
*ppbResult = NULL;
// We want to keep track of the current offset from the start
// of the buffer before the size is increased.
//
DWORD dwBufOffset = pOemPDEV->dwBufSize;
// We fill out the file header in OEMEndDoc. But for the info header, we take the easy route
// and copy the stuff from pBitmapInfoHeader. Only height and image size will be updated
// every time we enter ImageProcessing.
//
if (!pOemPDEV->bHeadersFilled)
{
ULONG ulMonoPalette[2] = { RGB_BLACK, RGB_WHITE, };
pOemPDEV->bHeadersFilled = TRUE;
pOemPDEV->bmInfoHeader.biSize = pBitmapInfoHeader->biSize;
pOemPDEV->bmInfoHeader.biPlanes = pBitmapInfoHeader->biPlanes;
pOemPDEV->bmInfoHeader.biBitCount = pBitmapInfoHeader->biBitCount;
pOemPDEV->bmInfoHeader.biCompression = pBitmapInfoHeader->biCompression;
pOemPDEV->bmInfoHeader.biXPelsPerMeter = pBitmapInfoHeader->biXPelsPerMeter;
pOemPDEV->bmInfoHeader.biYPelsPerMeter = pBitmapInfoHeader->biYPelsPerMeter;
pOemPDEV->bmInfoHeader.biClrUsed = pBitmapInfoHeader->biClrUsed;
pOemPDEV->bmInfoHeader.biClrImportant = pBitmapInfoHeader->biClrImportant;
pOemPDEV->bmInfoHeader.biWidth = pBitmapInfoHeader->biWidth; // We support only Portrait. So width is constant and needs to be updated only once.
if (dwCallbackID != BMF_24BPP) // We need color table only if it is not 24bpp
{
DWORD cbMemAllocSize;
pOemPDEV->bColorTable = TRUE; // Indicates that color table needs to be dumped at EndDoc time
switch(dwCallbackID)
{
case BMF_1BPP: // 1
pOemPDEV->cPalColors = 2;
pOemPDEV->prgbq = NULL;
// Call intsafe.h function to ensure there's no integer overflow or underflow
if (!SUCCEEDED(DWordMult(pOemPDEV->cPalColors, sizeof(RGBQUAD), &cbMemAllocSize)) ||
(NULL == (pOemPDEV->prgbq = (RGBQUAD *)LocalAlloc(LPTR, cbMemAllocSize))))
{
return E_FAIL;
}
for (int i = 0; i < pOemPDEV->cPalColors; i++)
{
pOemPDEV->prgbq[i].rgbBlue = GetBValue(ulMonoPalette[i]);
pOemPDEV->prgbq[i].rgbGreen = GetGValue(ulMonoPalette[i]);
pOemPDEV->prgbq[i].rgbRed = GetRValue(ulMonoPalette[i]);
}
break;
case BMF_4BPP: // 2
pOemPDEV->cPalColors = 16;
if (!bFillColorTable(pOemPDEV))
return E_FAIL;
break;
case BMF_8BPP: // 3
pOemPDEV->cPalColors = 256;
if (!bFillColorTable(pOemPDEV))
return E_FAIL;
break;
}
}
}
// Keep track of the overall height and image size
//
pOemPDEV->bmInfoHeader.biHeight += pBitmapInfoHeader->biHeight;
pOemPDEV->bmInfoHeader.biSizeImage += pBitmapInfoHeader->biSizeImage;
// Increase the buffer by the size of the current band
//
if (!bGrowBuffer(pOemPDEV, pBitmapInfoHeader->biSizeImage))
return E_FAIL;
if (!pIPParams->bBlankBand) // Non-blank band
{
CopyMemory((pOemPDEV->pBufStart + dwBufOffset), pSrcBitmap, pBitmapInfoHeader->biSizeImage);
}
else // For blanks bands, buffer blank scanlines
{
memset((pOemPDEV->pBufStart + dwBufOffset), 0xff, pBitmapInfoHeader->biSizeImage);
}
// Set ppbResult to TRUE
//
*ppbResult = (LPBYTE)(INT_PTR)(TRUE);
return S_OK;
}
HRESULT __stdcall
COemUni2::
MemoryUsage(
PDEVOBJ pdevobj,
POEMMEMORYUSAGE pMemoryUsage
)
/*++
Routine Description:
Implementation of IPrintOemUni::MemoryUsage
The IPrintOemUni::MemoryUsage method can be used with
Unidrv-supported printers to specify the amount of memory
required for use by a rendering plug-in's IPrintOemUni::ImageProcessing
method.
Please refer to DDK documentation for more details.
Arguments:
pdevobj - pointer to a DEVOBJ structure.
pMemoryUsage - pointer to an OEMMEMORYUSAGE structure.
Return Value:
S_OK The operation succeeded.
E_FAIL The operation failed.
E_NOTIMPL The method is not implemented.
--*/
{
UNREFERENCED_PARAMETER(pdevobj);
UNREFERENCED_PARAMETER(pMemoryUsage);
return E_NOTIMPL;
}
HRESULT __stdcall
COemUni2::
OutputCharStr(
PDEVOBJ pdevobj,
PUNIFONTOBJ pUFObj,
DWORD dwType,
DWORD dwCount,
PVOID pGlyph
)
/*++
Routine Description:
Implementation of IPrintOemUni::OutputCharStr
The IPrintOemUni::OutputCharStr method enables a rendering
plug-in to control the printing of font glyphs.
Please refer to DDK documentation for more details.
Arguments:
pdevobj - pointer to a DEVOBJ structure.
pUFObj - pointer to a UNIFONTOBJ structure.
dwType - value indicating the type of glyph specifier array
pointed to by pGlyph. Valid values are as follows:
TYPE_GLYPHHANDLE The pGlyph array elements are glyph
handles of type HGLYPH.
TYPE_GLYPHID The pGlyph array elements are glyph
identifiers of type DWORD.
dwCount - value representing the number of glyph specifiers in
the array pointed to by pGlyph.
pGlyph - pointer to an array of glyph specifiers, where the array
element type is indicated by dwType.
Return Value:
S_OK The operation succeeded.
E_FAIL The operation failed.
E_NOTIMPL The method is not implemented.
--*/
{
UNREFERENCED_PARAMETER(pdevobj);
UNREFERENCED_PARAMETER(pUFObj);
UNREFERENCED_PARAMETER(dwType);
UNREFERENCED_PARAMETER(dwCount);
UNREFERENCED_PARAMETER(pGlyph);
return E_NOTIMPL;
}
HRESULT __stdcall
COemUni2::
PublishDriverInterface(
IUnknown *pIUnknown
)
/*++
Routine Description:
Implementation of IPrintOemUni::PublishDriverInterface
The IPrintOemUni::PublishDriverInterface method allows a
rendering plug-in for Unidrv to obtain the Unidrv driver's
IPrintOemDriverUni interface.
A rendering plug-in for Unidrv MUST implement the
IPrintOemUni::PublishDriverInterface method and the method
must return S_OK, or the driver will not call the plug-in's other
IPrintOemUni interface methods.
Please refer to DDK documentation for more details.
Arguments:
pIUnknown - pointer to the IUnknown interface of the driver's
IPrintOemDriverUni COM interface.
Return Value:
S_OK The operation succeeded.
E_FAIL The operation failed.
--*/
{
// Need to store pointer to Driver Helper functions, if we already haven't.
if (this->m_pOEMHelp == NULL)
{
HRESULT hResult;
// Get Interface to Helper Functions.
hResult = pIUnknown->QueryInterface(IID_IPrintOemDriverUni, (void** ) &(this->m_pOEMHelp));
if(!SUCCEEDED(hResult))
{
// Make sure that interface pointer reflects interface query failure.
this->m_pOEMHelp = NULL;
return E_FAIL;
}
}
return S_OK;
}
HRESULT __stdcall
COemUni2::
ResetPDEV(
PDEVOBJ pdevobjOld,
PDEVOBJ pdevobjNew
)
/*++
Routine Description:
Implementation of IPrintOemUni::ResetPDEV
The IPrintOemUni::ResetPDEV method allows a rendering
plug-in for Unidrv to reset its PDEV structure.
A rendering plug-in for Unidrv MUST implement the
IPrintOemUni::ResetPDEV method.
A rendering plug-in's IPrintOemUni::ResetPDEV method performs
the same types of operations as the DrvResetPDEV function. During
the processing of an application's call to the Platform SDK ResetDC
function, the IPrintOemUni::ResetPDEV method is called by Unidrv's
DrvResetPDEV function. For more information about when DrvResetPDEV
is called, see its description in the DDK docs.
The rendering plug-in's private PDEV structure's address is contained
in the pdevOEM member of the DEVOBJ structure pointed to by pdevobjOld.
The IPrintOemUni::ResetPDEV method should use relevant members of this
old structure to fill in the new structure, which is referenced through pdevobjNew.
Please refer to DDK documentation for more details.
Arguments:
pdevobjOld - pointer to a DEVOBJ structure containing current PDEV information.
pdevobjNew - pointer to a DEVOBJ structure into which the method should place
new PDEV information.
Return Value:
S_OK The operation succeeded.
E_FAIL The operation failed.
--*/
{
UNREFERENCED_PARAMETER(pdevobjOld);
UNREFERENCED_PARAMETER(pdevobjNew);
return S_OK;
}
HRESULT __stdcall
COemUni2::
SendFontCmd(
PDEVOBJ pdevobj,
PUNIFONTOBJ pUFObj,
PFINVOCATION pFInv
)
/*++
Routine Description:
Implementation of IPrintOemUni::SendFontCmd
The IPrintOemUni::SendFontCmd method enables a rendering
plug-in to modify a printer's font selection command and then
send it to the printer.
Please refer to DDK documentation for more details.
Arguments:
pdevobj - pointer to a DEVOBJ structure.
pUFObj - pointer to a UNIFONTOBJ structure.
pFInv - pointer to an FINVOCATION structure.
Return Value:
S_OK The operation succeeded.
E_FAIL The operation failed.
E_NOTIMPL The method is not implemented.
--*/
{
UNREFERENCED_PARAMETER(pdevobj);
UNREFERENCED_PARAMETER(pUFObj);
UNREFERENCED_PARAMETER(pFInv);
return E_NOTIMPL;
}
HRESULT __stdcall
COemUni2::
TextOutAsBitmap(
SURFOBJ *pso,
STROBJ *pstro,
FONTOBJ *pfo,
CLIPOBJ *pco,
RECTL *prclExtra,
RECTL *prclOpaque,
BRUSHOBJ *pboFore,
BRUSHOBJ *pboOpaque,
POINTL *pptlOrg,
MIX mix
)
/*++
Routine Description:
Implementation of IPrintOemUni::TextOutAsBitmap
The IPrintOemUni::TextOutAsBitmap method allows a rendering
plug-in to create a bitmap image of a text string, in case a
downloadable font is not available.
Please refer to DDK documentation for more details.
Arguments:
pso - Defines the surface on which to be written.
pstro - Defines the glyphs to be rendered and their positions
pfo - Specifies the font to be used
pco - Defines the clipping path
prclExtra - A NULL-terminated array of rectangles to be filled
prclOpaque - Specifies an opaque rectangle
pboFore - Defines the foreground brush
pboOpaque - Defines the opaque brush
pptlOrg - Pointer to POINT struct , defining th origin
mix - Specifies the foreground and background ROPs for pboFore
Return Value:
S_OK The operation succeeded.
E_FAIL The operation failed.
E_NOTIMPL The method is not implemented.
--*/
{
UNREFERENCED_PARAMETER(pso);
UNREFERENCED_PARAMETER(pstro);
UNREFERENCED_PARAMETER(pfo);
UNREFERENCED_PARAMETER(pco);
UNREFERENCED_PARAMETER(prclExtra);
UNREFERENCED_PARAMETER(prclOpaque);
UNREFERENCED_PARAMETER(pboFore);
UNREFERENCED_PARAMETER(pboOpaque);
UNREFERENCED_PARAMETER(pptlOrg);
UNREFERENCED_PARAMETER(mix);
return E_NOTIMPL;
}
HRESULT __stdcall
COemUni2::
TTDownloadMethod(
PDEVOBJ pdevobj,
PUNIFONTOBJ pUFObj,
OUT DWORD *pdwResult
)
/*++
Routine Description:
Implementation of IPrintOemUni::TTDownloadMethod
The IPrintOemUni::TTDownloadMethod method enables a rendering
plug-in to indicate the format that Unidrv should use for a specified
TrueType soft font.
Please refer to DDK documentation for more details.
Arguments:
pdevobj - pointer to a DEVOBJ structure.
pUFObj - pointer to a UNIFONTOBJ structure.
pdwResult - Receives one of the following method-supplied constant values:
TTDOWNLOAD_BITMAP Unidrv should download the specified font as bitmaps.
TTDOWNLOAD_DONTCARE Unidrv can select the font format.
TTDOWNLOAD_GRAPHICS Unidrv should print TrueType fonts as graphics,
instead of downloading the font.
TTDOWNLOAD_TTOUTLINE Unidrv should download the specified font as outlines.
Return Value:
S_OK The operation succeeded.
E_FAIL The operation failed.
E_NOTIMPL The method is not implemented.
--*/
{
UNREFERENCED_PARAMETER(pdevobj);
UNREFERENCED_PARAMETER(pUFObj);
UNREFERENCED_PARAMETER(pdwResult);
return E_NOTIMPL;
}
HRESULT __stdcall
COemUni2::
TTYGetInfo(
PDEVOBJ pdevobj,
DWORD dwInfoIndex,
PVOID pOutputBuf,
DWORD dwSize,
DWORD *pcbcNeeded
)
/*++
Routine Description:
Implementation of IPrintOemUni::TTYGetInfo
The IPrintOemUni::TTYGetInfo method enables a rendering plug-in
to supply Unidrv with information relevant to text-only printers.
Please refer to DDK documentation for more details.
Arguments:
pdevobj - pointer to a DEVOBJ structure.
dwInfoIndex - constant identifying the type of information being requested.
The following constant values are defined:
OEMTTY_INFO_CODEPAGE - The pOutputBuf parameter points to a
DWORD in which the method should return the number of the
code page to be used.
OEMTTY_INFO_MARGINS - The pOutputBuf parameter points to a
RECT structure in which the method should return page margin
widths, in tenths of millimeters (for example, 20 represents 2 mm).
If the entire page is printable, all margin values must be 0.
OEMTTY_INFO_NUM_UFMS - The pOutputBuf parameter points to a
DWORD in which the method should return the number of resource
IDs of the UFMs for 10, 12, and 17 CPI fonts. To actually obtain
these resource IDs, perform a query using OEMTTY_INFO_UFM_IDS.
OEMTTY_INFO_UFM_IDS - The pOutputBuf parameter points to an array
of DWORDs of sufficient size to hold the number of resource IDs of
the UFMs for 10, 12, and 17 CPI fonts. (This number is obtained by
using OEMTTY_INFO_NUM_UFMS in a query.) The method should
return the resource IDs of the UFMs for 10,12, and 17 CPI fonts.
pOutputBuf - pointer to a buffer to receive the requested information.
dwSize - size, in bytes, of the buffer pointed to by pOutputBuf.
pcbcNeeded - pointer to a location to receive the number of bytes written into
the buffer pointed to by pOutputBuf. If the number of bytes required is
smaller than the number specified by dwSize, the method should supply
the required size and return E_FAIL.
Return Value:
S_OK The operation succeeded.
E_FAIL The operation failed.
E_NOTIMPL The method is not implemented.
--*/
{
UNREFERENCED_PARAMETER(pdevobj);
UNREFERENCED_PARAMETER(dwInfoIndex);
UNREFERENCED_PARAMETER(pOutputBuf);
UNREFERENCED_PARAMETER(dwSize);
UNREFERENCED_PARAMETER(pcbcNeeded);
return E_NOTIMPL;
}
HRESULT __stdcall
COemUni2::
WritePrinter(
PDEVOBJ pdevobj,
PVOID pBuf,
DWORD cbBuffer,
PDWORD pcbWritten
)
/*++
Routine Description:
Implementation of IPrintOemUni2::WritePrinter
The IPrintOemUni2::WritePrinter method, if supported, enables a
rendering plug-in to capture all output data generated by a Unidrv
driver. If this method is not supported, the output data would
otherwise be sent to the spooler in a call to the spooler's WritePrinter API.
Please refer to DDK documentation for more details.
Arguments:
pdevobj - pointer to a DEVOBJ structure.
pBuf - pointer to the first byte of an array of bytes that contains
the output data generated by the Unidrv driver.
cbBuffer - size, in bytes, of the array pointed to by pBuf.
pcbWritten - pointer to a DWORD value that receives the number
of bytes of data that were successfully sent to the plug-in.
Return Value:
S_OK The operation succeeded.
E_FAIL The operation failed.
E_NOTIMPL The method is not implemented.
--*/
{
UNREFERENCED_PARAMETER(pdevobj);
UNREFERENCED_PARAMETER(pBuf);
UNREFERENCED_PARAMETER(cbBuffer);
UNREFERENCED_PARAMETER(pcbWritten);
return E_NOTIMPL;
}
////////////////////////////////////////////////////////////////////////////////
//
// oem class factory
//
class COemCF : public IClassFactory
{
public:
// *** IUnknown methods ***
STDMETHOD(QueryInterface)(THIS_ REFIID riid, LPVOID FAR* ppvObj);
STDMETHOD_(ULONG,AddRef)(THIS);
// the _At_ tag here tells prefast that once release
// is called, the memory should not be considered leaked
_At_(this, __drv_freesMem(object))
STDMETHOD_(ULONG,Release)(THIS);
// *** IClassFactory methods ***
STDMETHOD(CreateInstance)(THIS_
LPUNKNOWN pUnkOuter,
REFIID riid,
LPVOID FAR* ppvObject);
STDMETHOD(LockServer)(THIS_ BOOL bLock);
// Constructor
COemCF(): m_cRef(1) { };
// Destructor
~COemCF() { };
protected:
LONG m_cRef;
};
///////////////////////////////////////////////////////////
//
// Class factory body
//
HRESULT __stdcall
COemCF::
QueryInterface(
const IID& iid,
void** ppv)
{
if ((iid == IID_IUnknown) || (iid == IID_IClassFactory))
{
*ppv = static_cast<COemCF*>(this);
}
else
{
*ppv = NULL;
return E_NOINTERFACE;
}
reinterpret_cast<IUnknown*>(*ppv)->AddRef();
return S_OK;
}
ULONG __stdcall
COemCF::
AddRef()
{
return InterlockedIncrement(&m_cRef);
}
_At_(this, __drv_freesMem(object))
ULONG __stdcall
COemCF::
Release()
{
// ASSERT( 0 != m_cRef);
ULONG cRef = InterlockedDecrement(&m_cRef);
if (0 == cRef)
{
delete this;
}
return cRef;
}
// IClassFactory implementation
HRESULT __stdcall
COemCF::
CreateInstance(
IUnknown* pUnknownOuter,
const IID& iid,
void** ppv)
{
if (ppv == NULL)
{
return E_POINTER;
}
*ppv = NULL;
// Cannot aggregate.
if (pUnknownOuter != NULL)
{
return CLASS_E_NOAGGREGATION;
}
// Create component.
COemUni2* pOemCP = new COemUni2;
if (pOemCP == NULL)
{
return E_OUTOFMEMORY;
}
// Get the requested interface.
HRESULT hr = pOemCP->QueryInterface(iid, ppv);
// Release the IUnknown pointer.
// (If QueryInterface failed, component will delete itself.)
pOemCP->Release();
return hr;
}
// LockServer
HRESULT __stdcall
COemCF::
LockServer(
BOOL bLock
)
{
if (bLock)
{
InterlockedIncrement(&g_cServerLocks);
}
else
{
InterlockedDecrement(&g_cServerLocks);
}
return S_OK;
}
//
// Registration functions
//
//
// Can DLL unload now?
//
STDAPI DllCanUnloadNow(void)
{
//
// To avoid leaving OEM DLL still in memory when Unidrv or Pscript drivers
// are unloaded, Unidrv and Pscript driver ignore the return value of
// DllCanUnloadNow of the OEM DLL, and always call FreeLibrary on the OEMDLL.
//
// If OEM DLL spins off a working thread that also uses the OEM DLL, the
// thread needs to call LoadLibrary and FreeLibraryAndExitThread, otherwise
// it may crash after Unidrv or Pscript calls FreeLibrary.
//
if ((g_cComponents == 0) && (g_cServerLocks == 0))
{
return S_OK;
}
else
{
return S_FALSE;
}
}
//
// Get class factory
//
STDAPI DllGetClassObject(
_In_ REFCLSID clsid,
_In_ REFIID iid,
_Outptr_ LPVOID* ppv)
{
if (ppv == NULL)
{
return E_POINTER;
}
*ppv = NULL;
// Can we create this component?
if (clsid != CLSID_OEMRENDER)
{
ERR("DllGetClassObject:\tClass not available!\r\n");
return CLASS_E_CLASSNOTAVAILABLE;
}
// Create class factory.
COemCF* pFontCF = new COemCF; // Reference count set to 1 in constructor
if (pFontCF == NULL)
{
ERR("DllGetClassObject:\tOut of Memory!\r\n");
return E_OUTOFMEMORY;
}
// Get requested interface.
HRESULT hrResult = pFontCF->QueryInterface(iid, ppv);
pFontCF->Release();
return hrResult;
}
BOOL
bGrowBuffer(
POEMPDEV pOemPDEV,
DWORD dwBufInc
)
/*++
Routine Description:
Enlarge the buffer for holding the bitmap data
Arguments:
pOemPDEV - Pointer to the private PDEV structure
dwBufInc - Amount to enlarge the buffer by
Return Value:
TRUE if successful, FALSE if memory allocation fails
--*/
{
DWORD dwOldBufferSize;
PBYTE pNewBuffer;
// Allocate a new buffer whose size is the size of the previous buffer plus the increment
//
dwOldBufferSize = pOemPDEV->pBufStart ? pOemPDEV->dwBufSize : 0;
pOemPDEV->dwBufSize = dwOldBufferSize + dwBufInc;
if (NULL == (pNewBuffer = (PBYTE)LocalAlloc(LPTR, pOemPDEV->dwBufSize)))
{
WARNING("LocalAlloc failed!\n");
vFreeBuffer(pOemPDEV);
return FALSE;
}
if (pOemPDEV->pBufStart) // Growing an existing buffer
{
CopyMemory(pNewBuffer, pOemPDEV->pBufStart, dwOldBufferSize);
LocalFree(pOemPDEV->pBufStart);
pOemPDEV->pBufStart = pNewBuffer;
}
else // First time allocation
{
pOemPDEV->pBufStart = pNewBuffer;
}
return TRUE;
}
VOID
vFreeBuffer(
POEMPDEV pOemPDEV
)
/*++
Routine Description:
Free the buffer for holding the bitmap data
Arguments:
pOemPDEV - Pointer to the private PDEV structure
Return Value:
None
--*/
{
if (pOemPDEV->pBufStart)
{
LocalFree(pOemPDEV->pBufStart);
pOemPDEV->pBufStart = NULL;
pOemPDEV->dwBufSize = 0;
}
}
BOOL
bFillColorTable(
POEMPDEV pOemPDEV
)
/*++
Routine Description:
Fill the color table for the bitmap data. This function
obtains the entries in the default palette and fills the
RGBQUAD structure that represents the color table.
Arguments:
pOemPDEV - Pointer to the private PDEV structure
Return Value:
TRUE if successful, FALSE if memory allocation for the color table fails
--*/
{
PALETTEENTRY * pPaletteEntry;
UINT uiPalEntries;
INT iLastPalIndex = pOemPDEV->cPalColors - 1;
DWORD cbMemAllocSize;
pOemPDEV->prgbq = NULL;
// Call intsafe.h function to ensure there's no integer overflow or underflow
if (!SUCCEEDED(DWordMult(pOemPDEV->cPalColors, sizeof(RGBQUAD), &cbMemAllocSize)) ||
(NULL == (pOemPDEV->prgbq = (RGBQUAD *)LocalAlloc(LPTR, cbMemAllocSize))))
{
return FALSE;
}
// Call intsafe.h function to ensure there's no integer overflow or underflow
if (!SUCCEEDED(DWordMult(pOemPDEV->cPalColors, sizeof(PALETTEENTRY), &cbMemAllocSize)) ||
(NULL == (pPaletteEntry = (PALETTEENTRY *)LocalAlloc(LPTR, cbMemAllocSize))))
{
return FALSE;
}
uiPalEntries = GetPaletteEntries(pOemPDEV->hpalDefault, 0, pOemPDEV->cPalColors, pPaletteEntry);
if (uiPalEntries == 0)
{
LocalFree(pPaletteEntry);
return FALSE;
}
for (int i = 0; i < pOemPDEV->cPalColors; i++)
{
pOemPDEV->prgbq[i].rgbBlue = pPaletteEntry[i].peBlue;
pOemPDEV->prgbq[i].rgbGreen = pPaletteEntry[i].peGreen;
pOemPDEV->prgbq[i].rgbRed = pPaletteEntry[i].peRed;
}
// Set the last index in the color table to white
//
pOemPDEV->prgbq[iLastPalIndex].rgbBlue = 0xff;
pOemPDEV->prgbq[iLastPalIndex].rgbGreen = 0xff;
pOemPDEV->prgbq[iLastPalIndex].rgbRed = 0xff;
return TRUE;
}
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