transmit_dm_linux_backend/test/testpdf.cpp

/*
 * << Haru Free PDF Library 2.0.0 >> -- font_demo.cpp
 *
 * Copyright (c) 1999-2006 Takeshi Kanno <takeshi_kanno@est.hi-ho.ne.jp>
 *
 * 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 <iconv.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include <string>
// #include <exception>
#include "hpdf.h"

#ifdef HPDF_DLL
void __stdcall
#else
void
#endif
    error_handler(HPDF_STATUS error_no, HPDF_STATUS detail_no, void* user_data) {
  printf("ERROR: error_no=%04X, detail_no=%u\n", (HPDF_UINT)error_no, (HPDF_UINT)detail_no);
}

// const char *font_list[] = {"SimHei", NULL};

// int main(int argc, char **argv) {
//   const char *page_title = "Font Demo";
//   HPDF_Doc    pdf;
//   char        fname[256];
//   HPDF_Page   page;
//   HPDF_Font   def_font;
//   HPDF_REAL   tw;
//   HPDF_REAL   height;
//   HPDF_REAL   width;
//   HPDF_UINT   i;

//   strcpy(fname, argv[0]);
//   strcat(fname, ".pdf");

//   pdf = HPDF_New(error_handler, NULL);
//   if (!pdf) {
//     printf("error: cannot create PdfDoc object\n");
//     return 1;
//   }

//   HPDF_STATUS statu = HPDF_UseCNSFonts(pdf);
//   printf("HPDF_UseCNSFonts: %x\n", statu);
//   statu             = HPDF_UseCNTFonts(pdf);
//     printf("HPDF_UseCNTFonts: %x\n", statu);
//   statu             = HPDF_UseCNTEncodings(pdf);
//     printf("HPDF_UseCNTEncodings: %x\n", statu);
//   statu             = HPDF_UseCNSEncodings(pdf);
//     printf("HPDF_UseCNSEncodings: %x\n", statu);

//   try {
//     /* Add a new page object. */
//     page = HPDF_AddPage(pdf);

//     height = HPDF_Page_GetHeight(page);
//     width  = HPDF_Page_GetWidth(page);

//     /* Print the lines of the page. */
//     HPDF_Page_SetLineWidth(page, 1);
//     HPDF_Page_Rectangle(page, 50, 50, width - 100, height - 110);
//     HPDF_Page_Stroke(page);

//     /* Print the title of the page (with positioning center). */
//     def_font = HPDF_GetFont(pdf, "Helvetica", NULL);
//     HPDF_Page_SetFontAndSize(page, def_font, 24);

//     tw = HPDF_Page_TextWidth(page, page_title);
//     HPDF_Page_BeginText(page);
//     HPDF_Page_MoveTextPos(page, (width - tw) / 2, height - 50);
//     HPDF_Page_ShowText(page, page_title);
//     HPDF_Page_EndText(page);

//     /* output subtitle. */
//     HPDF_Page_BeginText(page);
//     HPDF_Page_MoveTextPos(page, 60, height - 80);
//     HPDF_Page_SetFontAndSize(page, def_font, 16);
//     HPDF_Page_ShowText(page, "<Standerd Type1 fonts samples>");
//     HPDF_Page_EndText(page);

//     HPDF_Page_BeginText(page);
//     HPDF_Page_MoveTextPos(page, 60, height - 105);

//     i = 0;
//     while (font_list[i]) {
//       const char *samp_text = "abcd";
//       HPDF_Font   font      = HPDF_GetFont(pdf, font_list[i], NULL);
//       if (!font) {
//         printf("error: cannot get %s font\n", font_list[i]);
//         return 1;
//       }

//       /* print a label of text */
//       HPDF_Page_SetFontAndSize(page, def_font, 9);
//       HPDF_Page_ShowText(page, font_list[i]);
//       HPDF_Page_MoveTextPos(page, 0, -18);

//       /* print a sample text. */
//       HPDF_Page_SetFontAndSize(page, font, 20);
//       HPDF_Page_ShowText(page, samp_text);
//       HPDF_Page_MoveTextPos(page, 0, -20);

//       i++;
//     }

//     HPDF_Page_EndText(page);

//     HPDF_SaveToFile(pdf, fname);

//   } catch (...) {
//     HPDF_Free(pdf);
//     return 1;
//   }

//   /* clean up */
//   HPDF_Free(pdf);

//   return 0;
// }

using namespace std;

string utf8_to_gb2312(const std::string& utf8_str) {
  // 打开转换描述符
  iconv_t cd = iconv_open("GB2312", "UTF-8");
  if (cd == (iconv_t)-1) {
    perror("iconv_open failed");
    exit(EXIT_FAILURE);
  }

  // 输入字符串
  const char* in_str  = utf8_str.c_str();
  size_t      in_size = utf8_str.size();

  // 输出缓冲区
  size_t out_size = in_size * 2;  // 假设输出的字节数不会超过输入的两倍
  char*  out_buf  = new char[out_size];
  char*  out_str  = out_buf;

  // 进行转换
  if (iconv(cd, const_cast<char**>(&in_str), &in_size, &out_str, &out_size) == (size_t)-1) {
    perror("iconv failed");
    iconv_close(cd);
    delete[] out_buf;
    exit(EXIT_FAILURE);
  }

  // 关闭转换描述符
  iconv_close(cd);

  // 获取转换后的字符串
  std::string gb2312_str(out_buf, out_str - out_buf);
  // 释放内存
  delete[] out_buf;
  return gb2312_str;
}

int main() {
  HPDF_Doc  pdf;
  HPDF_Font font;
  HPDF_Page szPage[10115];
  HPDF_REAL tw;

  string strPdfContent = utf8_to_gb2312("这是一个测试,支持中文");

  string strPdfName = "XXX.pdf";

  pdf = HPDF_New(error_handler, NULL);

  HPDF_UseCNSFonts(pdf);
  HPDF_UseCNTFonts(pdf);
  HPDF_UseCNTEncodings(pdf);
  HPDF_UseCNSEncodings(pdf);

  // support Chinese Song (SimSun)and Chinese black (SimHei)
  font = HPDF_GetFont(pdf, "SimSun", "GBK-EUC-H");
  if (!font) {
    printf("error: cannot get font\n");
    return 1;
  }

  for (int i = 0; i < 10115; ++i) {
    szPage[i] = HPDF_AddPage(pdf);

    HPDF_Page_SetSize(szPage[i], HPDF_PAGE_SIZE_LETTER, HPDF_PAGE_PORTRAIT);

    HPDF_Page_BeginText(szPage[i]);

    HPDF_Page_SetFontAndSize(szPage[i], font, 20);

    tw = HPDF_Page_TextWidth(szPage[i], strPdfContent.c_str());

    HPDF_Page_MoveTextPos(szPage[i], (HPDF_Page_GetWidth(szPage[i]) - tw) / 2, (HPDF_Page_GetHeight(szPage[i]) - 20) / 2);

    HPDF_Page_ShowText(szPage[i], strPdfContent.c_str());

    HPDF_Page_EndText(szPage[i]);
  }

  HPDF_SaveToFile(pdf, strPdfName.c_str());
  HPDF_Free(pdf);
}