Category : C Source Code
Archive   : C_ROTATE.ZIP
Filename : GPRINT.I

/* Listing for GPRINT.I (include file)
Graphics programming in Turbo C++ p 91
*/
void erasestr( int xloc, int yloc, char *str )
{
struct textsettingstype textinfo;
int xdim, ydim;
void *textimage;
gettextsettings( &textinfo );
switch( textinfo.direction )
{
case HORIZ_DIR: xdim = textwidth( str );
ydim = textheight( str );
xloc--;
break;
case VERT_DIR : ydim = textwidth( str );
xdim = textheight( str );
yloc++;
}
switch( textinfo.horiz )
{
case LEFT_TEXT : break;
case CENTER_TEXT: xloc -= xdim / 2;
break;
case RIGHT_TEXT : xloc -= xdim;
}
switch( textinfo.vert )
{
case BOTTOM_TEXT: yloc -= ydim;
break;
case CENTER_TEXT: yloc -= ydim / 2;
break;
case TOP_TEXT : ;
}
while( xloc<0 ) { xloc++; xdim--; }
while( yloc<0 ) { yloc++; ydim--; }
textimage = malloc( imagesize( xloc, yloc, xdim, ydim ) );
getimage( xloc, yloc, xloc+xdim, yloc+ydim, textimage );
putimage( xloc, yloc, textimage, XOR_PUT );
free( textimage );
}

/* GPRINTF is like printf but printed in graphics mode based on pixel loc */
void gprintf( int *xloc, int *yloc, char *fmt, ... )
{
va_list argptr;
char str[140];
struct textsettingstype textinfo;
int pos_adj = *xloc;
va_start( argptr, fmt);
vsprintf( str, fmt, argptr );
gettextsettings( &textinfo );
outtextxy( pos_adj, *yloc, str);
switch( textinfo.direction )
{
case HORIZ_DIR: *yloc += textheight( str ) + 2;
break;
case VERT_DIR: *xloc += textheight( str ) + 2;
};
va_end( argptr );
}

/* GPRINTC like above but resets background color first */
void gprintc( int *xloc, int *yloc, char *fmt, ... )
{
va_list argptr;
char str[140];
struct textsettingstype textinfo;
int pos_adj = *xloc;
va_start( argptr, fmt);
vsprintf( str, fmt, argptr );
gettextsettings( &textinfo );
erasestr( *xloc, *yloc, str );
outtextxy( pos_adj, *yloc, str);
switch( textinfo.direction )
{
case HORIZ_DIR: *yloc += textheight( str ) + 2;
break;
case VERT_DIR: *xloc += textheight( str ) + 2;
};
va_end( argptr );
}

/* GPRINTXY- like gprintc except passed by value rather than address */
void gprintxy( int xloc, int yloc, char *fmt, ... )
{
va_list argptr;
char str[140];
struct textsettingstype textinfo;
va_start( argptr, fmt );
vsprintf( str, fmt, argptr );
gettextsettings( &textinfo );
erasestr( xloc, yloc, str );
outtextxy( xloc, yloc, str );
va_end( argptr );
}