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L_SetPDFOptions

#include "l_bitmap.h"

L_LTFIL_API L_INT L_SetPDFOptions(pOptions)

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

Parameters

pFILEPDFOPTIONS pOptions

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

Returns

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

Comments

The FILEPDFOPTIONS.uStructSize member 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.

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, Linux.

Functions

L_GetPDFOptions

Topics

Raster Image Functions: Loading Files
Implementing PDF Features
For a list of functions that utilize the LOADFILEOPTION or SAVEFILEOPTION structures, refer to Functions Utilizing the LOADFILEOPTION or SAVEFILEOPTION structures.

Example

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

L_INT SetPDFOptionsExample(L_TCHAR     * pszPDFFileName, 
                                           pBITMAPHANDLE pBitmap, 
                                           L_INT         nDisplayDepth) 
{ 
   L_INT nRet; 
   FILEPDFOPTIONS PdfOptions; 
 
   /* Get the current PDF options */    
   nRet = L_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 = L_SetPDFOptions(&PdfOptions); 
   if(nRet != SUCCESS) 
      return nRet; 
 
   if(pBitmap->Flags.Allocated) 
      L_FreeBitmap(pBitmap); 
 
   /* Now load the PDF file */ 
   nRet = L_LoadBitmap(pszPDFFileName, 
                pBitmap, 
                sizeof(BITMAPHANDLE), 
                0, 
                ORDER_RGB, 
                NULL, 
                NULL); 
   if(nRet != SUCCESS) 
      return nRet; 
   nRet = L_SaveBitmap(MAKE_IMAGE_PATH(TEXT("Result.BMP")), pBitmap, FILE_BMP, 24, 0, NULL); 
   if(nRet != SUCCESS) 
      return nRet; 
   return SUCCESS; 
}

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