null.c

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//      PLplot Null device driver.
//
#include "plDevs.h"
 
#ifdef PLD_null
 
#include "plplotP.h"
#include "drivers.h"
 
// Device info
PLDLLIMPEXP_DRIVER const char* plD_DEVICE_INFO_null = "null:Null device:-1:null:42:null\n";
 
void plD_dispatch_init_null( PLDispatchTable *pdt );
 
void plD_init_null( PLStream * );
void plD_line_null( PLStream *, short, short, short, short );
void plD_polyline_null( PLStream *, short *, short *, PLINT );
void plD_eop_null( PLStream * );
void plD_bop_null( PLStream * );
void plD_tidy_null( PLStream * );
void plD_state_null( PLStream *, PLINT );
void plD_esc_null( PLStream *, PLINT, void * );
 
void plD_dispatch_init_null( PLDispatchTable *pdt )
{
#ifndef ENABLE_DYNDRIVERS
    pdt->pl_MenuStr = "Null device";
    pdt->pl_DevName = "null";
#endif
    pdt->pl_type     = plDevType_Null;
    pdt->pl_seq      = 42;
    pdt->pl_init     = (plD_init_fp) plD_init_null;
    pdt->pl_line     = (plD_line_fp) plD_line_null;
    pdt->pl_polyline = (plD_polyline_fp) plD_polyline_null;
    pdt->pl_eop      = (plD_eop_fp) plD_eop_null;
    pdt->pl_bop      = (plD_bop_fp) plD_bop_null;
    pdt->pl_tidy     = (plD_tidy_fp) plD_tidy_null;
    pdt->pl_state    = (plD_state_fp) plD_state_null;
    pdt->pl_esc      = (plD_esc_fp) plD_esc_null;
}
 
//--------------------------------------------------------------------------
// plD_init_null()
//
// Initialize device (terminal).
//--------------------------------------------------------------------------
 
void
plD_init_null( PLStream *PL_UNUSED( pls ) )
{
    int   xmin = 0;
    int   xmax = PIXELS_X - 1;
    int   ymin = 0;
    int   ymax = PIXELS_Y - 1;
 
    PLFLT pxlx = (double) PIXELS_X / (double) LPAGE_X;
    PLFLT pxly = (double) PIXELS_Y / (double) LPAGE_Y;
 
// Set up device parameters
 
    plP_setpxl( pxlx, pxly );
    plP_setphy( xmin, xmax, ymin, ymax );
}
 
//--------------------------------------------------------------------------
// The remaining driver functions are all null.
//--------------------------------------------------------------------------
 
void
plD_line_null( PLStream * PL_UNUSED( pls ), short PL_UNUSED( x1a ), short PL_UNUSED( y1a ), short PL_UNUSED( x2a ), short PL_UNUSED( y2a ) )
{
}
 
void
plD_polyline_null( PLStream *PL_UNUSED( pls ), short *PL_UNUSED( xa ), short *PL_UNUSED( ya ), PLINT PL_UNUSED( npts ) )
{
}
 
void
plD_eop_null( PLStream *PL_UNUSED( pls ) )
{
}
 
void
plD_bop_null( PLStream *PL_UNUSED( pls ) )
{
}
 
void
plD_tidy_null( PLStream *PL_UNUSED( pls ) )
{
}
 
void
plD_state_null( PLStream *PL_UNUSED( pls ), PLINT PL_UNUSED( op ) )
{
}
 
void
plD_esc_null( PLStream *PL_UNUSED( pls ), PLINT PL_UNUSED( op ), void *PL_UNUSED( ptr ) )
{
}
 
#else
int
pldummy_null()
{
    return 0;
}
 
#endif                          // PLD_nulldev