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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 (c) Microsoft Corporation. All rights reserved
//
// File Name:
//
// xpsrasfilter.h
//
// Abstract:
//
// Xps Rasterization Service sample filter definition. The
// XPSRasFilter provides the interface to the filter pipeline manager.
//
#pragma once
namespace xpsrasfilter
{
//
// Class to maintain the shared state of operation between multiple components
// of the filter. Also provides the callback for the Xps Rasterization Service.
//
class FilterLiveness : public UnknownBase<IXpsRasterizerNotificationCallback>
{
public:
FilterLiveness() :
m_isAlive(TRUE)
{}
virtual
~FilterLiveness() {}
BOOL
IsAlive()
{
return m_isAlive;
}
void
Cancel()
{
//
// May be called from a different thread
//
m_isAlive = FALSE;
}
//
// IXpsRasterizerNotificationCallback Method
//
virtual _Must_inspect_result_
HRESULT STDMETHODCALLTYPE
Continue()
{
return (m_isAlive) ? (S_OK) : (HRESULT_FROM_WIN32(ERROR_PRINT_CANCELLED));
}
private:
volatile BOOL m_isAlive;
//
// prevent copy semantics
//
FilterLiveness(const FilterLiveness&);
FilterLiveness& operator=(const FilterLiveness&);
};
class XPSRasFilter : public UnknownBase<IPrintPipelineFilter>
{
public:
static LONG ms_numObjects; // Number of instances of XPSRasFilter
XPSRasFilter();
virtual
~XPSRasFilter();
//
// IPrintPipelineFilter Methods
//
virtual _Must_inspect_result_
HRESULT STDMETHODCALLTYPE
InitializeFilter(
_In_ IInterFilterCommunicator *pICommunicator,
_In_ IPrintPipelinePropertyBag *pIPropertyBag,
_In_ IPrintPipelineManagerControl *pIPipelineControl
);
virtual _Must_inspect_result_
HRESULT STDMETHODCALLTYPE
ShutdownOperation();
virtual _Must_inspect_result_
HRESULT STDMETHODCALLTYPE
StartOperation();
private:
//
// prevent copy semantics
//
XPSRasFilter(const XPSRasFilter&);
XPSRasFilter& operator=(const XPSRasFilter&);
//
// Xps package part reader
//
IXpsDocumentProvider_t m_pReader;
IPrintWriteStream_t m_pWriter;
//
// Pipeline Property Bag
//
IPrintPipelinePropertyBag_t m_pIPropertyBag;
//
// IPrintPipelineFilter Methods (throwing)
//
VOID
StartOperation_throws();
VOID
InitializeFilter_throws(
const IInterFilterCommunicator_t &pICommunicator,
const IPrintPipelinePropertyBag_t &pIPropertyBag
);
//
// Keeps track of whether the operation has been cancelled
//
FilterLiveness_t m_pLiveness;
};
} // namespace xpsrasfilter
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