utf8.c

Multi-byte UTF-8 example.

This is an UTF-8 example for multi-byte encoded text. It is important to have font with appropriate characters (Chinese in this example). Noto Sans font is used here.

/*
 * << Haru Free PDF Library 2.4.4 >> -- utf8.c
 *
 * Copyright (c) 1999-2006 Takeshi Kanno <takeshi_kanno@est.hi-ho.ne.jp>
 * Copyright (c) 2023 Dmitry Solomennikov
 *
 * Permission to use, copy, modify, distribute and sell this software
 * and its documentation for any purpose is hereby granted without fee,
 * provided that the above copyright notice appear in all copies and
 * that both that copyright notice and this permission notice appear
 * in supporting documentation.
 * It is provided "as is" without express or implied warranty.
 *
 */
 
#include <stdio.h>
#include <string.h>
#include <setjmp.h>
#include "hpdf.h"
#include "handler.h"
 
int
main (int argc, char **argv)
{
    HPDF_Doc  pdf;
    HPDF_Page page;
    HPDF_ExtGState gstate;
    char fname[256];
 
    strcpy (fname, argv[0]);
    strcat (fname, ".pdf");
 
    /* create document object*/
    pdf = HPDF_New (demo_error_handler, NULL);
 
    if (!pdf) {
        printf ("error: cannot create PdfDoc object\n");
        return 1;
    }
 
    if (setjmp(env)) {
        HPDF_Free (pdf);
        return 1;
    }
 
    page = HPDF_AddPage(pdf);
    HPDF_Page_SetSize(page, HPDF_PAGE_SIZE_A4, HPDF_PAGE_LANDSCAPE);
    HPDF_Font font;
    const char *font_name;
 
    HPDF_UseUTFEncodings (pdf);
    HPDF_SetCurrentEncoder (pdf, "UTF-8");
    font_name = HPDF_LoadTTFontFromFile (pdf, "ttfont/NotoSansSC-Regular.ttf", HPDF_TRUE);
    font = HPDF_GetFont (pdf, font_name, "UTF-8");
    HPDF_Page_SetFontAndSize (page, font, 36);
 
 
    HPDF_Page_GSave (page);
    gstate = HPDF_CreateExtGState (pdf);
    HPDF_ExtGState_SetAlphaFill (gstate, 0.4);
    HPDF_Page_SetExtGState (page, gstate);
    HPDF_Page_SetRGBFill(page, 0,0,0.7);
 
    HPDF_Page_BeginText(page);
 
    HPDF_Page_MoveTextPos(page, 100, HPDF_Page_GetHeight (page) - 100);
    HPDF_Page_ShowText(page, "Привет, мир!");
    HPDF_Page_MoveTextPos(page, 0, -100);
    HPDF_Page_ShowText(page, "Peña, ¿cómo va, mundo?");
    HPDF_Page_MoveTextPos(page, 0, -100);
    HPDF_Page_ShowText(page, "你好，世界！");
 
    HPDF_Page_EndText(page);
    HPDF_Page_GRestore (page);
 
    HPDF_SaveToFile(pdf, fname);
    HPDF_Free(pdf);
 
    return 0;
}