LFileSettings::SetPDFOptions

#include "ltwrappr.h"

static L_INT LFileSettings::SetPDFOptions(pOptions)

pointer to a structure

Sets the file options used by LEADTOOLS when loading PDF, PS or EPS files.

Parameter	Description
pOptions	Pointer to a structure that contains the options to use when loading PDF, PS or EPS files.

Returns

SUCCESS	The function was successful.
< 1	An error occurred. Refer to Return Codes.

Comments

The nSize member of the FILEPDFOPTIONS structure must be set before calling this function. If a PDF, PS or EPS file is loaded without first calling this function, the following default values will be used:

FILEPDFOPTIONS Member:	Default value:
bUseLibFonts	TRUE
nDisplayDepth	24
nTextAlpha	4
nGraphicsAlpha	1

The values set by this function are valid for the current thread. To change the values used by the current thread, this function must be called again.

Both font and graphics anti-aliasing slow down the drawing of the resulting bitmap.

Font and graphics anti-aliasing can only be used if nDisplayDepth is 8 or greater.

For a list of functions that utilize the LOADFILEOPTION or SAVEFILEOPTION structures, refer to Functions Utilizing the LOADFILEOPTION or SAVEFILEOPTION structures.

Required DLLs and Libraries

LTFIL
File format DLLs

For a listing of the exact DLLs and Libraries needed, based on the toolkit version, refer to Files To Be Included With Your Application.

Platforms

Win32, x64.

Example

This example loads a PDF file, with a display depth defined by the user and without using font anti-aliasing.

L_INT LFileSettings__SetPDFOptionsExample(L_TCHAR* pszPDFFileName, LBitmap* pBitmap,L_INT nDisplayDepth) 
{ 
   L_INT nRet; 
   FILEPDFOPTIONS PdfOptions; 
   /* Get the current PDF options */ 
   nRet = LFileSettings::GetPDFOptions(&PdfOptions,sizeof(FILEPDFOPTIONS)); 
   if(nRet != SUCCESS) 
      return nRet; 
   /*Change display depth */ 
   switch(nDisplayDepth) 
   { 
      /*We only accept 1,4,8 or 24*/ 
      case 1   : 
      case 4   : 
      case 8   : 
      case 24  : 
      PdfOptions.nDisplayDepth = nDisplayDepth; 
      break; 
default : 
      MessageBox (NULL,TEXT("Invalid Display Depth"),TEXT("Notice"), MB_OK); 
      /* current value is used instead of value passed by the user */ 
   } 
   /* No font anti-aliasing*/ 
   PdfOptions.nTextAlpha = 1; 
   /* Set new PDF options */ 
   nRet = LFileSettings::SetPDFOptions(&PdfOptions); 
   if(nRet != SUCCESS) 
      return nRet; 
   /* Now load the PDF file */ 
   nRet = pBitmap->Load(pszPDFFileName, 
   0, 
   ORDER_RGB, 
   NULL, 
   NULL ); 
   if(nRet != SUCCESS) 
      return nRet; 
   return SUCCESS; 
}

Help Version 19.0.2017.10.27

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LEADTOOLS Raster Imaging C++ Class Library Help

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Summary of Features

Functions:	LFileSettings::GetPDFOptions
Topics:	Raster Image Functions: Loading Files
	Implementing PDF Features