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gecko-dev/widget/windows/nsDeviceContextSpecWin.cpp

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "nsDeviceContextSpecWin.h"
#include "mozilla/ArrayUtils.h"
#include "mozilla/gfx/PrintPromise.h"
#include "mozilla/gfx/PrintTargetPDF.h"
#include "mozilla/gfx/PrintTargetWindows.h"
#include "mozilla/Logging.h"
#include "mozilla/Preferences.h"
#include "mozilla/RefPtr.h"
#include "mozilla/Telemetry.h"
#include "nsAnonymousTemporaryFile.h"
#include <wchar.h>
#include <windef.h>
#include <winspool.h>
#include "nsIWidget.h"
#include "nsTArray.h"
#include "nsIPrintSettingsWin.h"
#include "nsComponentManagerUtils.h"
#include "nsPrinterWin.h"
#include "nsReadableUtils.h"
#include "nsString.h"
#include "gfxWindowsSurface.h"
#include "nsIFileStreams.h"
#include "nsWindowsHelpers.h"
#include "mozilla/gfx/Logging.h"
#ifdef MOZ_ENABLE_SKIA_PDF
# include "mozilla/gfx/PrintTargetSkPDF.h"
# include "mozilla/gfx/PrintTargetEMF.h"
# include "nsIUUIDGenerator.h"
# include "nsDirectoryServiceDefs.h"
# include "nsPrintfCString.h"
# include "nsThreadUtils.h"
#endif
extern mozilla::LazyLogModule gPrintingLog;
#define PR_PL(_p1) MOZ_LOG(gPrintingLog, mozilla::LogLevel::Debug, _p1)
using namespace mozilla;
using namespace mozilla::gfx;
#ifdef MOZ_ENABLE_SKIA_PDF
using namespace mozilla::widget;
#endif
static const wchar_t kDriverName[] = L"WINSPOOL";
//----------------------------------------------------------------------------------
//---------------
// static members
//----------------------------------------------------------------------------------
nsDeviceContextSpecWin::nsDeviceContextSpecWin() = default;
//----------------------------------------------------------------------------------
NS_IMPL_ISUPPORTS(nsDeviceContextSpecWin, nsIDeviceContextSpec)
nsDeviceContextSpecWin::~nsDeviceContextSpecWin() {
SetDevMode(nullptr);
if (mTempFile) {
mTempFile->Remove(/* recursive = */ false);
}
if (nsCOMPtr<nsIPrintSettingsWin> ps = do_QueryInterface(mPrintSettings)) {
ps->SetDeviceName(u""_ns);
ps->SetDriverName(u""_ns);
ps->SetDevMode(nullptr);
}
}
static bool GetDefaultPrinterName(nsAString& aDefaultPrinterName) {
DWORD length = 0;
GetDefaultPrinterW(nullptr, &length);
if (length) {
aDefaultPrinterName.SetLength(length);
if (GetDefaultPrinterW((LPWSTR)aDefaultPrinterName.BeginWriting(),
&length)) {
// `length` includes the terminating null, so we subtract that from our
// string length.
aDefaultPrinterName.SetLength(length - 1);
PR_PL(("DEFAULT PRINTER [%s]\n",
NS_ConvertUTF16toUTF8(aDefaultPrinterName).get()));
return true;
}
}
aDefaultPrinterName.Truncate();
PR_PL(("NO DEFAULT PRINTER\n"));
return false;
}
//----------------------------------------------------------------------------------
NS_IMETHODIMP nsDeviceContextSpecWin::Init(nsIPrintSettings* aPrintSettings,
bool aIsPrintPreview) {
mPrintSettings = aPrintSettings;
// Get the Printer Name to be used and output format.
nsAutoString printerName;
if (mPrintSettings) {
mOutputFormat = mPrintSettings->GetOutputFormat();
mPrintSettings->GetPrinterName(printerName);
}
// If there is no name then use the default printer
if (printerName.IsEmpty()) {
GetDefaultPrinterName(printerName);
}
// Gather telemetry on the print target type.
//
// Unfortunately, if we're not using our own internal save-to-pdf codepaths,
// there isn't a good way to determine whether a print is going to be to a
// physical printer or to a file or some other non-physical output. We do our
// best by checking for what seems to be the most common save-to-PDF virtual
// printers.
//
// We use StringBeginsWith below, since printer names are often followed by a
// version number or other product differentiating string. (True for doPDF,
// novaPDF, PDF-XChange and Soda PDF, for example.)
if (mOutputFormat == nsIPrintSettings::kOutputFormatPDF) {
Telemetry::ScalarAdd(Telemetry::ScalarID::PRINTING_TARGET_TYPE,
u"pdf_file"_ns, 1);
} else if (StringBeginsWith(printerName, u"Microsoft Print to PDF"_ns) ||
StringBeginsWith(printerName, u"Adobe PDF"_ns) ||
StringBeginsWith(printerName, u"Bullzip PDF Printer"_ns) ||
StringBeginsWith(printerName, u"CutePDF Writer"_ns) ||
StringBeginsWith(printerName, u"doPDF"_ns) ||
StringBeginsWith(printerName, u"Foxit Reader PDF Printer"_ns) ||
StringBeginsWith(printerName, u"Nitro PDF Creator"_ns) ||
StringBeginsWith(printerName, u"novaPDF"_ns) ||
StringBeginsWith(printerName, u"PDF-XChange"_ns) ||
StringBeginsWith(printerName, u"PDF24 PDF"_ns) ||
StringBeginsWith(printerName, u"PDFCreator"_ns) ||
StringBeginsWith(printerName, u"PrimoPDF"_ns) ||
StringBeginsWith(printerName, u"Soda PDF"_ns) ||
StringBeginsWith(printerName, u"Solid PDF Creator"_ns) ||
StringBeginsWith(printerName,
u"Universal Document Converter"_ns)) {
Telemetry::ScalarAdd(Telemetry::ScalarID::PRINTING_TARGET_TYPE,
u"pdf_file"_ns, 1);
} else if (printerName.EqualsLiteral("Microsoft XPS Document Writer")) {
Telemetry::ScalarAdd(Telemetry::ScalarID::PRINTING_TARGET_TYPE,
u"xps_file"_ns, 1);
} else {
nsAString::const_iterator start, end;
printerName.BeginReading(start);
printerName.EndReading(end);
if (CaseInsensitiveFindInReadable(u"pdf"_ns, start, end)) {
Telemetry::ScalarAdd(Telemetry::ScalarID::PRINTING_TARGET_TYPE,
u"pdf_unknown"_ns, 1);
} else {
Telemetry::ScalarAdd(Telemetry::ScalarID::PRINTING_TARGET_TYPE,
u"unknown"_ns, 1);
}
}
nsresult rv = NS_ERROR_GFX_PRINTER_NO_PRINTER_AVAILABLE;
if (aPrintSettings) {
#ifdef MOZ_ENABLE_SKIA_PDF
nsAutoString printViaPdf;
Preferences::GetString("print.print_via_pdf_encoder", printViaPdf);
if (printViaPdf.EqualsLiteral("skia-pdf")) {
mPrintViaSkPDF = true;
}
#endif
// If we're in the child or we're printing to PDF we only need information
// from the print settings.
if (XRE_IsContentProcess() ||
mOutputFormat == nsIPrintSettings::kOutputFormatPDF) {
return NS_OK;
}
nsCOMPtr<nsIPrintSettingsWin> psWin(do_QueryInterface(aPrintSettings));
if (psWin) {
nsAutoString deviceName;
nsAutoString driverName;
psWin->GetDeviceName(deviceName);
psWin->GetDriverName(driverName);
LPDEVMODEW devMode;
psWin->GetDevMode(&devMode); // creates new memory (makes a copy)
if (!deviceName.IsEmpty() && !driverName.IsEmpty() && devMode) {
// Scaling is special, it is one of the few
// devMode items that we control in layout
if (devMode->dmFields & DM_SCALE) {
double scale = double(devMode->dmScale) / 100.0f;
if (scale != 1.0) {
aPrintSettings->SetScaling(scale);
devMode->dmScale = 100;
}
}
SetDeviceName(deviceName);
SetDriverName(driverName);
SetDevMode(devMode);
return NS_OK;
} else {
PR_PL(
("***** nsDeviceContextSpecWin::Init - "
"deviceName/driverName/devMode was NULL!\n"));
if (devMode) ::HeapFree(::GetProcessHeap(), 0, devMode);
}
}
} else {
PR_PL(("***** nsDeviceContextSpecWin::Init - aPrintSettingswas NULL!\n"));
}
if (printerName.IsEmpty()) {
return rv;
}
return GetDataFromPrinter(printerName, mPrintSettings);
}
//----------------------------------------------------------
already_AddRefed<PrintTarget> nsDeviceContextSpecWin::MakePrintTarget() {
NS_ASSERTION(mDevMode || mOutputFormat == nsIPrintSettings::kOutputFormatPDF,
"DevMode can't be NULL here unless we're printing to PDF.");
#ifdef MOZ_ENABLE_SKIA_PDF
if (mPrintViaSkPDF) {
double width, height;
mPrintSettings->GetEffectivePageSize(&width, &height);
if (width <= 0 || height <= 0) {
return nullptr;
}
// convert twips to points
width /= TWIPS_PER_POINT_FLOAT;
height /= TWIPS_PER_POINT_FLOAT;
IntSize size = IntSize::Ceil(width, height);
if (mOutputFormat == nsIPrintSettings::kOutputFormatPDF) {
nsString filename;
// TODO(dshin):
// - Does this handle bug 1659470?
// - Should this code path be enabled, we should use temporary files and
// then move the file in `EndDocument()`.
mPrintSettings->GetToFileName(filename);
nsAutoCString printFile(NS_ConvertUTF16toUTF8(filename).get());
auto skStream = MakeUnique<SkFILEWStream>(printFile.get());
return PrintTargetSkPDF::CreateOrNull(std::move(skStream), size);
}
if (mDevMode) {
NS_WARNING_ASSERTION(!mDriverName.IsEmpty(), "No driver!");
HDC dc =
::CreateDCW(mDriverName.get(), mDeviceName.get(), nullptr, mDevMode);
if (!dc) {
gfxCriticalError(gfxCriticalError::DefaultOptions(false))
<< "Failed to create device context in GetSurfaceForPrinter";
return nullptr;
}
return PrintTargetEMF::CreateOrNull(dc, size);
}
}
#endif
if (mOutputFormat == nsIPrintSettings::kOutputFormatPDF) {
double width, height;
mPrintSettings->GetEffectiveSheetSize(&width, &height);
if (width <= 0 || height <= 0) {
return nullptr;
}
// convert twips to points
width /= TWIPS_PER_POINT_FLOAT;
height /= TWIPS_PER_POINT_FLOAT;
auto stream = [&]() -> nsCOMPtr<nsIOutputStream> {
if (mPrintSettings->GetOutputDestination() ==
nsIPrintSettings::kOutputDestinationStream) {
nsCOMPtr<nsIOutputStream> out;
mPrintSettings->GetOutputStream(getter_AddRefs(out));
return out;
}
// Even if the destination may be a named path, write to a temp file -
// this is consistent with behaviour of `PrintTarget` on other platforms.
nsCOMPtr<nsIFile> file;
nsresult rv = NS_OpenAnonymousTemporaryNsIFile(getter_AddRefs(mTempFile));
file = mTempFile;
if (NS_WARN_IF(NS_FAILED(rv))) {
return nullptr;
}
nsCOMPtr<nsIFileOutputStream> stream =
do_CreateInstance("@mozilla.org/network/file-output-stream;1");
if (NS_FAILED(stream->Init(file, -1, -1, 0))) {
return nullptr;
}
return stream;
}();
return PrintTargetPDF::CreateOrNull(stream, IntSize::Ceil(width, height));
}
if (mDevMode) {
NS_WARNING_ASSERTION(!mDriverName.IsEmpty(), "No driver!");
HDC dc =
::CreateDCW(mDriverName.get(), mDeviceName.get(), nullptr, mDevMode);
if (!dc) {
gfxCriticalError(gfxCriticalError::DefaultOptions(false))
<< "Failed to create device context in GetSurfaceForPrinter";
return nullptr;
}
// The PrintTargetWindows takes over ownership of this DC
return PrintTargetWindows::CreateOrNull(dc);
}
return nullptr;
}
RefPtr<PrintEndDocumentPromise> nsDeviceContextSpecWin::EndDocument() {
if (mPrintSettings->GetOutputDestination() !=
nsIPrintSettings::kOutputDestinationFile ||
mOutputFormat != nsIPrintSettings::kOutputFormatPDF) {
return PrintEndDocumentPromise::CreateAndResolve(true, __func__);
}
#ifdef MOZ_ENABLE_SKIA_PDF
if (mPrintViaSkPDF) {
return PrintEndDocumentPromise::CreateAndResolve(true, __func__);
}
#endif
MOZ_ASSERT(mTempFile, "No handle to temporary PDF file.");
nsAutoString targetPath;
mPrintSettings->GetToFileName(targetPath);
if (targetPath.IsEmpty()) {
return PrintEndDocumentPromise::CreateAndResolve(true, __func__);
}
// We still need to move the file to its actual destination.
nsCOMPtr<nsIFile> destFile;
auto rv = NS_NewLocalFile(targetPath, false, getter_AddRefs(destFile));
if (NS_FAILED(rv)) {
return PrintEndDocumentPromise::CreateAndReject(rv, __func__);
}
return nsIDeviceContextSpec::EndDocumentAsync(
__func__,
[destFile = std::move(destFile),
tempFile = std::move(mTempFile)]() -> nsresult {
nsAutoString destLeafName;
MOZ_TRY(destFile->GetLeafName(destLeafName));
nsCOMPtr<nsIFile> destDir;
MOZ_TRY(destFile->GetParent(getter_AddRefs(destDir)));
// This should be fine - Windows API calls usually prevent moving
// between different volumes (See Win32 API's `MOVEFILE_COPY_ALLOWED`
// flag), but we handle that down this call.
MOZ_TRY(tempFile->MoveTo(destDir, destLeafName));
return NS_OK;
});
}
//----------------------------------------------------------------------------------
void nsDeviceContextSpecWin::SetDeviceName(const nsAString& aDeviceName) {
mDeviceName = aDeviceName;
}
//----------------------------------------------------------------------------------
void nsDeviceContextSpecWin::SetDriverName(const nsAString& aDriverName) {
mDriverName = aDriverName;
}
//----------------------------------------------------------------------------------
void nsDeviceContextSpecWin::SetDevMode(LPDEVMODEW aDevMode) {
if (mDevMode) {
::HeapFree(::GetProcessHeap(), 0, mDevMode);
}
mDevMode = aDevMode;
}
//------------------------------------------------------------------
void nsDeviceContextSpecWin::GetDevMode(LPDEVMODEW& aDevMode) {
aDevMode = mDevMode;
}
#define DISPLAY_LAST_ERROR
//----------------------------------------------------------------------------------
// Setup the object's data member with the selected printer's data
nsresult nsDeviceContextSpecWin::GetDataFromPrinter(const nsAString& aName,
nsIPrintSettings* aPS) {
nsresult rv = NS_ERROR_FAILURE;
nsHPRINTER hPrinter = nullptr;
const nsString& flat = PromiseFlatString(aName);
wchar_t* name =
(wchar_t*)flat.get(); // Windows APIs use non-const name argument
BOOL status = ::OpenPrinterW(name, &hPrinter, nullptr);
if (status) {
nsAutoPrinter autoPrinter(hPrinter);
LPDEVMODEW pDevMode;
// Allocate a buffer of the correct size.
LONG needed =
::DocumentPropertiesW(nullptr, hPrinter, name, nullptr, nullptr, 0);
if (needed < 0) {
PR_PL(
("**** nsDeviceContextSpecWin::GetDataFromPrinter - Couldn't get "
"size of DEVMODE using DocumentPropertiesW(pDeviceName = \"%s\"). "
"GetLastEror() = %08lx\n",
NS_ConvertUTF16toUTF8(aName).get(), GetLastError()));
return NS_ERROR_FAILURE;
}
// Some drivers do not return the correct size for their DEVMODE, so we
// over-allocate to try and compensate.
// (See https://bugzilla.mozilla.org/show_bug.cgi?id=1664530#c5)
needed *= 2;
pDevMode =
(LPDEVMODEW)::HeapAlloc(::GetProcessHeap(), HEAP_ZERO_MEMORY, needed);
if (!pDevMode) return NS_ERROR_FAILURE;
// Get the default DevMode for the printer and modify it for our needs.
LONG ret = ::DocumentPropertiesW(nullptr, hPrinter, name, pDevMode, nullptr,
DM_OUT_BUFFER);
if (ret == IDOK && aPS) {
nsCOMPtr<nsIPrintSettingsWin> psWin = do_QueryInterface(aPS);
MOZ_ASSERT(psWin);
psWin->CopyToNative(pDevMode);
// Sets back the changes we made to the DevMode into the Printer Driver
ret = ::DocumentPropertiesW(nullptr, hPrinter, name, pDevMode, pDevMode,
DM_IN_BUFFER | DM_OUT_BUFFER);
// We need to copy the final DEVMODE settings back to our print settings,
// because they may have been set from invalid prefs.
if (ret == IDOK) {
// We need to get information from the device as well.
nsAutoHDC printerDC(::CreateICW(kDriverName, name, nullptr, pDevMode));
if (NS_WARN_IF(!printerDC)) {
::HeapFree(::GetProcessHeap(), 0, pDevMode);
return NS_ERROR_FAILURE;
}
psWin->CopyFromNative(printerDC, pDevMode);
}
}
if (ret != IDOK) {
::HeapFree(::GetProcessHeap(), 0, pDevMode);
PR_PL(
("***** nsDeviceContextSpecWin::GetDataFromPrinter - "
"DocumentProperties call failed code: %ld/0x%lx\n",
ret, ret));
DISPLAY_LAST_ERROR
return NS_ERROR_FAILURE;
}
SetDevMode(
pDevMode); // cache the pointer and takes responsibility for the memory
SetDeviceName(aName);
SetDriverName(nsDependentString(kDriverName));
rv = NS_OK;
} else {
rv = NS_ERROR_GFX_PRINTER_NAME_NOT_FOUND;
PR_PL(
("***** nsDeviceContextSpecWin::GetDataFromPrinter - Couldn't open "
"printer: [%s]\n",
NS_ConvertUTF16toUTF8(aName).get()));
DISPLAY_LAST_ERROR
}
return rv;
}
//***********************************************************
// Printer List
//***********************************************************
nsPrinterListWin::~nsPrinterListWin() = default;
// Helper to get the array of PRINTER_INFO_4 records from the OS into a
// caller-supplied byte array; returns the number of records present.
static unsigned GetPrinterInfo4(nsTArray<BYTE>& aBuffer) {
const DWORD kLevel = 4;
DWORD needed = 0;
DWORD count = 0;
const DWORD kFlags = PRINTER_ENUM_LOCAL | PRINTER_ENUM_CONNECTIONS;
BOOL ok = ::EnumPrintersW(kFlags,
nullptr, // Name
kLevel, // Level
nullptr, // pPrinterEnum
0, // cbBuf (buffer size)
&needed, // Bytes needed in buffer
&count);
if (needed > 0) {
if (!aBuffer.SetLength(needed, fallible)) {
return 0;
}
ok = ::EnumPrintersW(kFlags, nullptr, kLevel, aBuffer.Elements(),
aBuffer.Length(), &needed, &count);
}
if (!ok) {
return 0;
}
return count;
}
nsTArray<nsPrinterListBase::PrinterInfo> nsPrinterListWin::Printers() const {
PR_PL(("nsPrinterListWin::Printers\n"));
AutoTArray<BYTE, 1024> buffer;
unsigned count = GetPrinterInfo4(buffer);
if (!count) {
PR_PL(("[No printers found]\n"));
return {};
}
const auto* printers =
reinterpret_cast<const _PRINTER_INFO_4W*>(buffer.Elements());
nsTArray<PrinterInfo> list;
for (unsigned i = 0; i < count; i++) {
// For LOCAL printers, we check whether OpenPrinter succeeds, and omit
// them from the list if not. This avoids presenting printers that the
// user cannot actually use (e.g. due to Windows permissions).
// For NETWORK printers, this check may block for a long time (waiting for
// network timeout), so we skip it; if the user tries to access a printer
// that isn't available, we'll have to show an error later.
// (We always need to be able to handle an error, anyhow, as the printer
// could get disconnected after we've created the list, for example.)
bool isAvailable = false;
if (printers[i].Attributes & PRINTER_ATTRIBUTE_NETWORK) {
isAvailable = true;
} else if (printers[i].Attributes & PRINTER_ATTRIBUTE_LOCAL) {
HANDLE handle;
if (::OpenPrinterW(printers[i].pPrinterName, &handle, nullptr)) {
::ClosePrinter(handle);
isAvailable = true;
}
}
if (isAvailable) {
list.AppendElement(PrinterInfo{nsString(printers[i].pPrinterName)});
PR_PL(("Printer Name: %s\n",
NS_ConvertUTF16toUTF8(printers[i].pPrinterName).get()));
}
}
if (list.IsEmpty()) {
PR_PL(("[No usable printers found]\n"));
return {};
}
list.Sort([](const PrinterInfo& a, const PrinterInfo& b) {
size_t len = std::min(a.mName.Length(), b.mName.Length());
int result = CaseInsensitiveCompare(a.mName.BeginReading(),
b.mName.BeginReading(), len);
return result ? result : int(a.mName.Length()) - int(b.mName.Length());
});
return list;
}
Maybe<nsPrinterListBase::PrinterInfo> nsPrinterListWin::PrinterByName(
nsString aName) const {
Maybe<PrinterInfo> rv;
AutoTArray<BYTE, 1024> buffer;
unsigned count = GetPrinterInfo4(buffer);
const auto* printers =
reinterpret_cast<const _PRINTER_INFO_4W*>(buffer.Elements());
for (unsigned i = 0; i < count; ++i) {
if (aName.Equals(nsString(printers[i].pPrinterName))) {
rv.emplace(PrinterInfo{aName});
break;
}
}
return rv;
}
Maybe<nsPrinterListBase::PrinterInfo> nsPrinterListWin::PrinterBySystemName(
nsString aName) const {
return PrinterByName(std::move(aName));
}
RefPtr<nsIPrinter> nsPrinterListWin::CreatePrinter(PrinterInfo aInfo) const {
return nsPrinterWin::Create(mCommonPaperInfo, std::move(aInfo.mName));
}
nsresult nsPrinterListWin::SystemDefaultPrinterName(nsAString& aName) const {
if (!GetDefaultPrinterName(aName)) {
NS_WARNING("Uh oh, GetDefaultPrinterName failed");
// Indicate failure by leaving aName untouched, i.e. the empty string.
}
return NS_OK;
}
NS_IMETHODIMP
nsPrinterListWin::InitPrintSettingsFromPrinter(
const nsAString& aPrinterName, nsIPrintSettings* aPrintSettings) {
NS_ENSURE_ARG_POINTER(aPrintSettings);
if (aPrinterName.IsEmpty()) {
return NS_OK;
}
// When printing to PDF on Windows there is no associated printer driver.
int16_t outputFormat = aPrintSettings->GetOutputFormat();
if (outputFormat == nsIPrintSettings::kOutputFormatPDF) {
return NS_OK;
}
RefPtr<nsDeviceContextSpecWin> devSpecWin = new nsDeviceContextSpecWin();
if (!devSpecWin) return NS_ERROR_OUT_OF_MEMORY;
// If the settings have already been initialized from prefs then pass these to
// GetDataFromPrinter, so that they are saved to the printer.
bool initializedFromPrefs;
nsresult rv =
aPrintSettings->GetIsInitializedFromPrefs(&initializedFromPrefs);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
if (initializedFromPrefs) {
// If we pass in print settings to GetDataFromPrinter it already copies
// things back to the settings, so we can return here.
return devSpecWin->GetDataFromPrinter(aPrinterName, aPrintSettings);
}
devSpecWin->GetDataFromPrinter(aPrinterName);
LPDEVMODEW devmode;
devSpecWin->GetDevMode(devmode);
if (NS_WARN_IF(!devmode)) {
return NS_ERROR_FAILURE;
}
aPrintSettings->SetPrinterName(aPrinterName);
// We need to get information from the device as well.
const nsString& flat = PromiseFlatString(aPrinterName);
char16ptr_t printerName = flat.get();
HDC dc = ::CreateICW(kDriverName, printerName, nullptr, devmode);
if (NS_WARN_IF(!dc)) {
return NS_ERROR_FAILURE;
}
nsCOMPtr<nsIPrintSettingsWin> psWin = do_QueryInterface(aPrintSettings);
MOZ_ASSERT(psWin);
psWin->CopyFromNative(dc, devmode);
::DeleteDC(dc);
return NS_OK;
}
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