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diff --git a/vcl/inc/salprn.hxx b/vcl/inc/salprn.hxx
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+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * 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/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#ifndef INCLUDED_VCL_INC_SALPRN_HXX
+#define INCLUDED_VCL_INC_SALPRN_HXX
+
+#include <i18nutil/paper.hxx>
+#include <rtl/ustring.hxx>
+#include <vcl/prntypes.hxx>
+#include <vcl/dllapi.h>
+#include <tools/gen.hxx>
+
+#include "salptype.hxx"
+
+#include <vector>
+#include <optional>
+
+class SalGraphics;
+class SalFrame;
+class ImplJobSetup;
+namespace vcl { class PrinterController; }
+namespace weld { class Window; }
+
+struct VCL_PLUGIN_PUBLIC SalPrinterQueueInfo
+{
+    OUString               maPrinterName;
+    OUString               maDriver;
+    OUString               maLocation;
+    OUString               maComment;
+    PrintQueueFlags        mnStatus;
+    sal_uInt32             mnJobs;
+    std::optional<OUString> moPortName; // only used by Windows backend
+
+                            SalPrinterQueueInfo();
+                            ~SalPrinterQueueInfo();
+};
+
+class VCL_PLUGIN_PUBLIC SalInfoPrinter
+{
+public:
+    std::vector< PaperInfo  >           m_aPaperFormats;    // all printer supported formats
+    bool                                m_bPapersInit;      // set to true after InitPaperFormats
+
+    SalInfoPrinter() : m_bPapersInit( false ) {}
+    virtual ~SalInfoPrinter();
+
+    // SalGraphics or NULL, but two Graphics for all SalFrames
+    // must be returned
+    virtual SalGraphics*            AcquireGraphics() = 0;
+    virtual void                    ReleaseGraphics( SalGraphics* pGraphics ) = 0;
+
+    virtual bool                    Setup(weld::Window* pFrame, ImplJobSetup* pSetupData) = 0;
+    // This function set the driver data and
+    // set the new indepen data in pSetupData
+    virtual bool                    SetPrinterData( ImplJobSetup* pSetupData ) = 0;
+    // This function merged the indepen driver data
+    // and set the new indepen data in pSetupData
+    // Only the data must changed, where the bit
+    // in nFlags is set
+    virtual bool                    SetData( JobSetFlags nFlags, ImplJobSetup* pSetupData ) = 0;
+
+    virtual void                    GetPageInfo( const ImplJobSetup* pSetupData,
+                                                 tools::Long& rOutWidth, tools::Long& rOutHeight,
+                                                 Point& rPageOffset,
+                                                 Size& rPaperSize ) = 0;
+    virtual sal_uInt32              GetCapabilities( const ImplJobSetup* pSetupData, PrinterCapType nType ) = 0;
+    virtual sal_uInt16              GetPaperBinCount( const ImplJobSetup* pSetupData ) = 0;
+    virtual OUString                GetPaperBinName( const ImplJobSetup* pSetupData, sal_uInt16 nPaperBin ) = 0;
+    // fills m_aPaperFormats and sets m_bPapersInit to true
+    virtual void                    InitPaperFormats( const ImplJobSetup* pSetupData ) = 0;
+    // returns angle that a landscape page will be turned counterclockwise wrt to portrait
+    virtual int                     GetLandscapeAngle( const ImplJobSetup* pSetupData ) = 0;
+};
+
+class VCL_PLUGIN_PUBLIC SalPrinter
+{
+    SalPrinter( const SalPrinter& ) = delete;
+    SalPrinter& operator=( const SalPrinter& ) = delete;
+
+public:
+    SalPrinter() {}
+    virtual ~SalPrinter();
+
+    virtual bool                    StartJob( const OUString* pFileName,
+                                              const OUString& rJobName,
+                                              const OUString& rAppName,
+                                              sal_uInt32 nCopies,
+                                              bool bCollate,
+                                              bool bDirect,
+                                              ImplJobSetup* pSetupData ) = 0;
+
+    // implement for pull model print systems only,
+    // default implementations (see salvtables.cxx) just returns false
+    virtual bool                    StartJob( const OUString* pFileName,
+                                              const OUString& rJobName,
+                                              const OUString& rAppName,
+                                              ImplJobSetup* pSetupData,
+                                              vcl::PrinterController& rController );
+
+    virtual bool                    EndJob() = 0;
+    virtual SalGraphics*            StartPage( ImplJobSetup* pSetupData, bool bNewJobData ) = 0;
+    virtual void                    EndPage() = 0;
+    virtual SalPrinterError         GetErrorCode() { return SalPrinterError::NONE; }
+
+};
+
+#endif // INCLUDED_VCL_INC_SALPRN_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */