开发学院软件开发VC 浅谈PDFlib中文输出(四)PDFlib 接收的几种文本输... 阅读

浅谈PDFlib中文输出(四)PDFlib 接收的几种文本输入形式

 2007-03-15 21:56:05 来源:WEB开发网   
核心提示: PDF_set_parameter(p, "charref", "true");PDF_set_parameter(p, "textformat", "bytes");下面给出一些有效的Character Re
PDF_set_parameter(p, "charref", "true");
PDF_set_parameter(p, "textformat", "bytes");
下面给出一些有效的Character Reference:

­ soft hyphen

­ soft hyphen

­ soft hyphen

€ Euro glyph (hexadecimal)

€ Euro glyph (decimal)

€ Euro glyph (entity name)

< less than sign

> greater than sign

& ampersand sign

Α Greek Alpha

下面是一个相关的例子--C 源程序(附上生成的pdf文件 –PDFlib_cs4.pdf)。

/*******************************************************************/
/* This example demostrates output Chinese Simplified text with different
/* ''textformat'' option under Chinese Simplifed Windows.
/*******************************************************************/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "pdflib.h"
int main(void)
{
  PDF       *p = NULL;
  int         Font_E = 0, Font_H = 0, Font_CS = 0, Left = 50, y = 800, i = 0;
  const int    INCRY = 25;
  char       text[128], buf[128];
  /* 1 byte text (English: "Simplified Chinese") */
  static const char byte_text[] =
    "12315115516015415114615114514440103150151156145163145";
  static const int byte_len = 18;
  static const char byte2_text[] = {0x53,0x69,0x6D,0x70,0x6C,0x69,0x66,0x69,0x65,
                        0x64,0x20,0x43,0x68,0x69,0x6E,0x65,0x73,0x65};
  static const int byte2_len = 18;
  /* 2 byte text (Simplified Chinese) */
  static const unsigned short utf16_text[] = {0x7B80,0x4F53,0x4E2D,0x6587};
  static const int utf16_len = 8;
  static const unsigned char utf16be_text[] ="17320011712311655145207";
  static const int utf16be_len = 8;
  static const unsigned char utf16be_bom_text[] = "37637717320011712311655145207";
  static const int utf16be_bom_len = 10;
  static const unsigned char utf16le_text[] ="20017312311755116207145";
  static const int utf16le_len = 8;
  static const unsigned char utf16le_bom_text[] = "37737620017312311755116207145";
  static const int utf16le_bom_len = 10;
  static const unsigned char utf8_text[] = "347256200344275223344270255346226207";
  static const int utf8_len = 12;
  static const unsigned char utf8_bom_text[] = "xEFxBBxBFxE7xAEx80xE4xBDx93xE4xB8xADxE6x96x87";
  static const int utf8_bom_len = 15;
  static const char htmlutf16_text[] = "简体中文";
  static const int htmlutf16_len = sizeof(htmlutf16_text) - 1;
  typedef struct
  {
    char *textformat;
    char *encname;
    const char *textstring;
    const int *textlength;
    const char *bomkind;
  } TestCase;
static const TestCase table_8[] = {
{ "bytes",   "winansi", (const char *)byte_text,     &byte_len,   ""},
   { "auto",    "winansi", (const char *)byte_text,     &byte_len,   ""},
   { "bytes",   "winansi", (const char *)byte2_text,    &byte2_len,   ""}, };
  static const TestCase table_16[] = {
{ "auto", "unicode", (const char *)utf16_text,    &utf16_len,   ""},
{ "utf16", "unicode", (const char *)utf16_text,    &utf16_len,   ""},
{ "auto", "unicode", (const char *)utf16be_bom_text, &utf16be_bom_len, ", UTF-16+BE-BOM"},
{ "auto",   "unicode",   (const char *)utf16le_bom_text, &utf16le_bom_len, ", UTF-16+LE-BOM"},
{ "utf16be", "unicode",  (const char *)utf16be_text,     &utf16be_len,  ""},
{ "utf16le",  "unicode",  (const char *)utf16le_text,      &utf16le_len,  ""},
{ "utf8",    "unicode",  (const char *)utf8_text,        &utf8_len,    ""},
{ "auto",    "unicode",  (const char *)utf8_bom_text,   &utf8_bom_len, ", UTF-8+BOM"},
{ "bytes", "unicode",  (const char *)htmlutf16_text, &htmlutf16_len, ", HTML unicode character"}, };
  const int  tsize_8 = sizeof table_8 / sizeof (TestCase);
  const int  tsize_16 = sizeof table_16 / sizeof (TestCase);
  /* create a new PDFlib object */
  if ((p = PDF_new()) == (PDF *) 0)
  {
    printf("Couldn''t create PDFlib object (out of memory)!
");
    return(2);
  }
  PDF_TRY(p) {
  if (PDF_begin_document(p, "pdflib_cs4.pdf", 0, "") == -1)
      {
    printf("Error: %s
", PDF_get_errmsg(p));
    return(2);
  }
  PDF_set_info(p, "Creator", "pdflib_cs4.c");
  PDF_set_info(p, "Author", "myi@pdflib.com");
  PDF_set_info(p, "Title", "Output Chinese Simplify with Different textformat");
    /* Start a new page. */
    PDF_begin_page_ext(p, a4_width, a4_height, "");
    Font_H = PDF_load_font(p, "Helvetica-Bold", 0, "winansi", "");
    /* 8-bit encoding */
    Font_E = PDF_load_font(p, "Times", 0, "winansi", "");
    PDF_setfont(p, Font_H, 24);
    PDF_show_xy(p, "8-bit encoding", Left+40, y);
    y -= 2*INCRY;
    for (i = 0; i < tsize_8; ++i)
    {
      PDF_setfont(p, Font_H, 14);
      sprintf(text, "%s encoding, %s textformat %s: ", table_8[i].encname,
        table_8[i].textformat, table_8[i].bomkind);
      PDF_show_xy(p, text, Left, y);
      y -= INCRY;
      PDF_set_parameter(p, "textformat", table_8[i].textformat);
      PDF_setfont(p, Font_E, 14);
      PDF_show_xy(p, table_8[i].textstring, Left, y);
      y -= INCRY;
    } /* for */
    /* 16-bit encoding */
    PDF_setfont(p, Font_H, 24);
    y -= 2*INCRY;
    PDF_show_xy(p, "16-bit encoding", Left+40, y);
    y -= 2*INCRY;
    PDF_set_parameter(p, "charref", "true");
    Font_CS = PDF_load_font(p, "STSong-Light", 0, "UniGB-UCS2-H", "");
    for (i = 0; i < tsize_16; i++)
    {
      PDF_setfont(p, Font_H, 14);
      sprintf(text, "%s encoding, %s textformat %s: ", table_16[i].encname,
        table_16[i].textformat, table_16[i].bomkind);
      PDF_show_xy(p, text, Left, y);
      y -= INCRY;
      PDF_setfont(p, Font_CS, 14);
      sprintf(buf, "textformat %s",table_16[i].textformat);
      PDF_fit_textline(p, table_16[i].textstring, *table_16[i].textlength,
               Left, y, buf);
      y -= INCRY;
    } /* for */
    /* End of page. */
    PDF_end_page_ext(p, "");
    PDF_end_document(p, "");
  }
  PDF_CATCH(p) {
    printf("PDFlib exception occurred in pdflib_cs4 sample:
");
    printf("[%d] %s: %s
",
    PDF_get_errnum(p), PDF_get_apiname(p), PDF_get_errmsg(p));
    PDF_delete(p);
    return(2);
  }
  PDF_delete(p);
  return 0;
}

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