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FrameBufferFontDBFind

Syntax
struct FrameBufferFontDB *FrameBufferFontDBFind(struct FrameBufferFontDB *ptr,char *name,int sze);
Header
base/fontdb.h
Library
fontdb
Description

The FrameBufferFontDBFind function attempts to locate a bitmap font in a font database.

The structure containing the font database is pointed to by the argument ptr.

The name of the font to search for is given by the zero terminated string pointed to by the argument name and the size of the font is given by the argument sze.

Returns
Returns a pointer to the structure containing the bitmap font on success. On error a NULL pointer is returned.
Errors
On error a NULL pointer is returned.
Example



Source Code: FrameBufferFontDBFind.c

/* FrameBufferFontDBFind.c
   =======================
   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 "fontdb.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 *txt={"Hello World"};

  int wdt=400;
  int hgt=400;

  struct FrameBuffer *fb=NULL;

  struct FrameBufferFontDB *fontdb=NULL;
  struct FrameBufferFont *font;

  FILE *fontfp=NULL;
  char *fntdbfname=NULL;

  char *fontname="Helvetica";
  float fontsize=34.0;

  fntdbfname=getenv("FONTDB");
  fontfp=fopen(fntdbfname,"r");
  if (fontfp !=NULL) {
   fontdb=FrameBufferFontDBLoad(fontfp);
   fclose(fontfp);
  }
 
  if (fontdb==NULL) {
   fprintf(stderr,"Could not load fonts.'n");
   exit(-1);
  }

  
  fb=FrameBufferMake("image",wdt,hgt,24);

  font=FrameBufferFontDBFind(fontdb,fontname,fontsize);


  FrameBufferText(fb,NULL,font,20,200,strlen(txt),
                  txt,0xffffffff,0x0f,1,NULL);

  FrameBufferSavePPM(fb,stdout);
  FrameBufferFree(fb);

  FrameBufferFontDBFree(fontdb);

  return 0;
}