PostScriptText

Syntax

int PostScriptText(struct PostScript *ptr, struct PostScriptMatrix *matrix, char *fname,float fsize, float x,float y,int num,char *txt, unsigned int color, struct PostScriptClip *clip);

Header

base/rps.h

Library

rps

Description

The PostScriptText function plots text.

The argument ptr is a pointer to the PostScript control structure. The argument matrix is an optional transformation matrix that can be applied to the rectangle. If this is set to a NULL pointer then no transformation is applied.

The zero terminated string pointed to by the argument fname gives thhe name of the font. The size of the font is given by the argument fsize.

The position at which the text is plotted is given by the arguments x, and y.

The number of character to plot is given by the argument num, and the characters are taken from the array pointed to by the argument txt.

The color used to plot the text is given by the color which is a 24-bit number that represents the red,green and blue components of the color as 8-bit number. The red channel occupies the most significant bits and the blue channel occupies the least significant bits.

The clipping polygon is given by the argument clip. If this is set to a NULL pointer, no clipping is performed.

Returns

Returns zero on success. On error, (-1) is returned.

Errors

On error, (-1) is returned.

Example

PostScriptText
Source Code: PostScriptText.c

/* PostScriptText
   ==============
   Author: R.J.Barnes
 Copyright (c) 2012 The Johns Hopkins University/Applied Physics Laboratory

This file is part of the Radar Software Toolkit (RST).

RST is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.

Modifications:




#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "rfbuffer.h"
#include "rps.h"

int stream(char *buf,int sze,void *data) {
  FILE *fp;
  fp=(FILE *) data;
  fwrite(buf,sze,1,stdout);
  return 0;
} 


int main(int argc,char *argv[]) {

  char *text="Hello world!";
 
  struct PostScript *ps=NULL;

  float wdt=400,hgt=400;
  float xoff=50,yoff=50;

  unsigned int fgcol=0xff000000;

  ps=PostScriptMake();
  PostScriptSetText(ps,stream,stdout);   
  PostScriptMakeDocument(ps,xoff,yoff,wdt,hgt,0);
  PostScriptMakePlot(ps);

  PostScriptText(ps,NULL,"Helvetica",34.0,20,50,
            strlen(text),text,fgcol,NULL);


  PostScriptEndPlot(ps);
  PostScriptEndDocument(ps);
  return 0;
}