PDF Core Layer

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== Introduction ==
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'''PDF Core Library''' is one layer of the ''PDF-XChange Editor SDK'' and ''PDF-XChange Core API SDK''. Interfaces of this layer provide access to high level objects of a PDF file, such as [[PXV:IPXC_Document|document]], [[PXV:IPXC_Page|pages]], [[PXV:IPXC_Annotation|annotations]], [[PXV:IPXC_FormField|form fields]], etc.
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The creation of new documents as well as modification to existing documents is supported. Further a means to render PDF pages to [[PXV:IPXC_Page_DrawToDevice|devices]] or to [[PXV:IPXC_Page_DrawToIXCPage|image]] to display content to a users screen is available.
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== PDF-XChange Core API SDK ==
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If the ''PDF-XChange Core API SDK'' is used, it '''must''' be initialized calling [[PXV:IPXC_Inst_Init|IPXC_Inst::Init]] method and should be finalized by calling the  [[PXV:IPXC_Inst_Finalize|IPXC_Inst::Finalize]] method.
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This method will have no effect within the ''PDF-XChange Editor SDK''.
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The ''PDF-XChange Core API SDK'' consists of one DLL and can be used without registration as a COM server. To use the ''PDF-XChange Core API SDK'' a developer must create an instance of the '''[[PXV:IPXC_Inst|IPXC_Inst]]''' object. There are several ways to do this.
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* If the ''PDF-XChange Core API SDK'' is used as a registered COM server, an '''IPXC_Inst''' object should be created using '''CoCreateInstance''' call:
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<pre class="brush:cpp">
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HRESULT fGetInst(CComPtr<IPXC_Inst>& inst)
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{
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  inst = nullptr;
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  HRESULT hr = CoCreateInstance(__uuidof(PXC_Inst), nullptr, CLSCTX_INPROC_SERVER, __uuidof(IPXC_Inst), (void**)&inst);
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  return hr;
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}
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</pre>
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* If using the ''PDF-XChange Core API SDK'' without registration as a COM server, the function '''PXC_GetInstance''', exported by the SDK's DLL should be called to get the '''IPXC_Inst''' object:
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<pre class="brush:cpp">
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typedef HRESULT (WINAPI *fnPXC_GetInstance)(IPXC_Inst** ppInst);
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HRESULT fGetInst(CComPtr<IPXC_Inst>& inst)
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{
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  inst = nullptr;
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  HMODULE hSDKInst = LoadLibrary(_T("PDFXCoreAPI.x64.dll"));
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  if (hSDKInst == nullptr)
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    return E_FAIL;
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  fnPXC_GetInstance pfn = (fnPXC_GetInstance)GetProcAddress(hSDKInst, "PXC_GetInstance");
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  if (pfn == nullptr)
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    return E_FAIL;
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  HRESULT hr = pfn(&inst);
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  return hr;
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}
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</pre>
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When '''IPXC_Inst''' is received, its method [[PXV:IPXC_Inst_Init|Init]] '''must''' be called to initialize the SDK and pass optionally a valid serial key. Use without first making this call with a valid serial key will result in the SDK functioning in 'Evaluation' mode.
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== PDF-XChange Editor SDK ==
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In the ''PDF-XChange Editor SDK'' the '''IPXC_Inst''' is initialized by the SDK itself and the methods '''Init''' and '''Finalize''' should not be used. '''IPXC_Inst''' object can be retrieved from the '''PDF-XChange Editor SDK's''' main object in the following way:
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<pre class="brush:cpp">
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HRESULT fGetInst(IPXV_Inst* pVInst, CComPtr<IPXC_Inst>& inst)
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{
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  inst = nullptr;
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  if (pVInst == nullptr)
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    return E_INVALIDARG;
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  CComPtr<IUnknown> pExt;
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  HRESULT hr = pVInst->GetExtension(L"PXC", &pExt);
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  if (FAILED(hr))
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    return hr;
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  hr = pExt->QueryInterface<IPXC_Inst>(&inst);
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  return hr;
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}
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</pre>
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== References ==
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* [[PXV:PXC_Enumerations|Enumerations]]
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* [[PXV:PXC_Interfaces|Interfaces]]
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* [[PXV:PXC_Structures|Structures]]

Latest revision as of 09:39, 16 September 2015

Introduction

PDF Core Library is one layer of the PDF-XChange Editor SDK and PDF-XChange Core API SDK. Interfaces of this layer provide access to high level objects of a PDF file, such as document, pages, annotations, form fields, etc.

The creation of new documents as well as modification to existing documents is supported. Further a means to render PDF pages to devices or to image to display content to a users screen is available.

PDF-XChange Core API SDK

If the PDF-XChange Core API SDK is used, it must be initialized calling IPXC_Inst::Init method and should be finalized by calling the IPXC_Inst::Finalize method. This method will have no effect within the PDF-XChange Editor SDK.

The PDF-XChange Core API SDK consists of one DLL and can be used without registration as a COM server. To use the PDF-XChange Core API SDK a developer must create an instance of the IPXC_Inst object. There are several ways to do this.

  • If the PDF-XChange Core API SDK is used as a registered COM server, an IPXC_Inst object should be created using CoCreateInstance call:
HRESULT fGetInst(CComPtr<IPXC_Inst>& inst)
{
  inst = nullptr;
  HRESULT hr = CoCreateInstance(__uuidof(PXC_Inst), nullptr, CLSCTX_INPROC_SERVER, __uuidof(IPXC_Inst), (void**)&inst);
  return hr;
}


  • If using the PDF-XChange Core API SDK without registration as a COM server, the function PXC_GetInstance, exported by the SDK's DLL should be called to get the IPXC_Inst object:
typedef HRESULT (WINAPI *fnPXC_GetInstance)(IPXC_Inst** ppInst);

HRESULT fGetInst(CComPtr<IPXC_Inst>& inst)
{
  inst = nullptr;
  HMODULE hSDKInst = LoadLibrary(_T("PDFXCoreAPI.x64.dll"));
  if (hSDKInst == nullptr)
    return E_FAIL;
  fnPXC_GetInstance pfn = (fnPXC_GetInstance)GetProcAddress(hSDKInst, "PXC_GetInstance");
  if (pfn == nullptr)
    return E_FAIL;
  HRESULT hr = pfn(&inst);
  return hr;
}

When IPXC_Inst is received, its method Init must be called to initialize the SDK and pass optionally a valid serial key. Use without first making this call with a valid serial key will result in the SDK functioning in 'Evaluation' mode.

PDF-XChange Editor SDK

In the PDF-XChange Editor SDK the IPXC_Inst is initialized by the SDK itself and the methods Init and Finalize should not be used. IPXC_Inst object can be retrieved from the PDF-XChange Editor SDK's main object in the following way: 

HRESULT fGetInst(IPXV_Inst* pVInst, CComPtr<IPXC_Inst>& inst)
{
  inst = nullptr;
  if (pVInst == nullptr)
    return E_INVALIDARG;
  CComPtr<IUnknown> pExt;
  HRESULT hr = pVInst->GetExtension(L"PXC", &pExt);
  if (FAILED(hr))
    return hr;
  hr = pExt->QueryInterface<IPXC_Inst>(&inst);
  return hr;
}

References

Retrieved from "https://sdkhelp.pdf-xchange.com/index.php?title=PXV:PXC&oldid=48029"