L_VecSetViewport

#include "lvkrn.h"

L_LVKRN_API L_INT L_VecSetViewport(pVector, pViewport)

Sets the current view port.

Parameters

pVECTORHANDLE pVector

Pointer to a vector handle.

const L_RECT *pViewport

Pointer to a RECT structure that contains data on the new view port.

Returns

Comments

Use this function to set the view port associated with a vector.

If pVector is attached to a window, you must call this function when processing WM_SIZE messages, since the VECTOR library needs to know when the window size has changed (DirectX), or when the double buffer mode is selected in the current VECTOR engine.

This function and L_VecSetCamera are required to complete the projection process from a vector image onto a 2D surface.

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.

L_INT VecSetViewportExample( 
   pVECTORHANDLE pVector, 
   pBITMAPHANDLE pBitmap) 
{ 
   L_INT nRet; 
   RECT rect; 
 
   /* Setup the viewport rectangle */ 
   rect.left   = 0; 
   rect.top    = 0; 
   rect.right  = pBitmap->Width / 2; 
   rect.bottom = pBitmap->Height / 2; 
 
   /* Set the viewport */ 
   nRet = L_VecSetViewport( pVector, &rect ); 
   if (nRet != SUCCESS) 
      return nRet; 
 
   /* Realize */ 
   nRet = L_VecRealize( pBitmap, pVector, FALSE ); 
 
   return nRet; 
}