wmimg.h

WDK 下的XPSDrv 中filter 例子之 watermark

/*++

Copyright (c) 2005 Microsoft Corporation

All rights reserved.

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.

File Name:

   wmimg.h

Abstract:

   Watermark image definition. The CWatermarkImage class is responsible
   for managing the image resource for a raster watermark. This implements
   the IResWriter interface so that the font can be added to the resource
   cache.

--*/

#pragma once

#include "rescache.h"
#include "wmptprop.h"

class CWatermarkImage : public IResWriter
{
public:
    CWatermarkImage(
        __in CONST CWMPTProperties& wmProps,
        __in CONST INT              resourceID
        );

    ~CWatermarkImage();

    HRESULT
    GetImageDimensions(
        __out SizeF* pDimensions
        );

    HRESULT
    WriteData(
        __in IPartBase*         pResource,
        __in IPrintWriteStream* pStream
        );

    HRESULT
    GetKeyName(
        __deref_out BSTR* pbstrKeyName
        );

    HRESULT
    GetResURI(
        __deref_out BSTR* pbstrResURI
        );

    HRESULT
    CheckResID(
        VOID
        );

private:
    HRESULT
    CreatePNGStream(
        VOID
        );

    HRESULT
    LoadPNGResource(
        VOID
        );

private:
    CWMPTProperties  m_WMProps;

    INT              m_resourceID;

    CComPtr<IStream> m_pPNGStream;

    PVOID            m_pPNGData;

    DWORD            m_cbPNGData;

    HGLOBAL          m_hPNGRes;
};