L_VecSetFontMapper

#include "lvkrn.h"

L_LVKRN_API L_INT L_VecSetFontMapper(pVector, pFontMapper, pUserData);

pVECTORHANDLE pVector;	/* pointer to a vector handle */
pVECTORFONTMAPPERCALLBACK pFontMapper	/* font mapper callback */
L_VOID *pUserData	/* pointer to more parameters for the callback */

Sets a font mapper for the vector handle. A font mapper is a callback function which is invoked when adding a new font to the resource list of the vector toolkit. Using the callback, the user can modify or replace the font before allowing the toolkit to use it. This function is available in the LEADTOOLS Vector Imaging Pro Toolkit.

Parameter	Description
pVector	Pointer to the vector handle for which to set the font mapper.
pFontMapper	Pointer to a callback function used to handle the font mapping. It allows the user to modify the contents of the font resource before adding it to the list of fonts maintained by the Vector toolkit. The callback function must adhere to the VECTORFONTMAPPERCALLBACK prototype.
pUserData	Void pointer that you can use to pass one or more additional parameters that the callback function needs. To use this feature, assign a value to a variable or create a structure that contains as many fields as you need. Then, in this parameter, pass the address of the variable or structure, casting it to L_VOID *. The callback function, which receives the address in its own pUserData parameter, can cast it to a pointer of the appropriate data type to access your variable or structure. If the additional parameters are not needed, you can pass NULL in this parameter.

Returns

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

Required DLLs and Libraries

LVKRN

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

See Also

Functions:	L_VecGetFontMapper, pVECTORFONTMAPPERCALLBACK
Topics:	Mapping Fonts Handling Font Mappers

Example

L_INT EXT_CALLBACK myFontMapperCB(
   pVECTORHANDLE pVector,
   LPLOGFONTW pLogFont,
   L_VOID* pUserData)
{
   UNREFERENCED_PARAMETER(pVector);
   /* pUserData points to "Arial" .. copy it to pLogFont->lfFaceName to force the toolkit
      to render all fonts as Arial */

   if( lstrcmp( pLogFont->lfFaceName, (L_TCHAR *)pUserData ) == 0 )
   {
      lstrcpy( pLogFont->lfFaceName, TEXT("Times New Roman"));
   }

   return SUCCESS;
}

L_INT VecSetFontMapperExample(pVECTORHANDLE pVector)
{
   L_INT nRet;
   pVECTORFONTMAPPERCALLBACK  pTempMapper;

   nRet = L_VecGetFontMapper( pVector, &pTempMapper );

   if( NULL == pTempMapper )
      nRet = L_VecSetFontMapper(pVector, myFontMapperCB, TEXT("Arial"));

   return nRet;
}