怎样使用PDFlib显示简体中文输出中文而不出现空白说明附源码

 最近使用PDFlib显示简体中文总是失败，程序运行后打开生成的pdf，整个页面是空白的，但程序中规定显示字的地方还可以选定，搞不懂了，哪位大侠给解释一下啊。

最近看了csdn上的一篇求助(https://bbs.youkuaiyun.com/topics/380056406#new_post),发现博主后来解决了问题,但并没把解决方法说出来,导致很多同行需要花费很多时间再去研究.

我把我的能用的结果分享给大家. 实际上就是在输出的时候转换为utf8格式就可以了.

必须设置这个头:

PDF_set_parameter(p, "charref", "true");
PDF_set_parameter(p, "textformat", "utf8");

输出的地方文本是utf8就可以了.还需要加个BOM头.

PDF_show(p, filenameBom.c_str());

以下是完整代码:

void ConvertGBKToUtf8(std::string& amp, std::string strGBK)

{
int len = MultiByteToWideChar(CP_ACP, 0, (LPCSTR)strGBK.c_str(), -1, NULL, 0);
unsigned short * wszUtf8 = new unsigned short[len + 1];
memset(wszUtf8, 0, len * 2 + 2);
MultiByteToWideChar(CP_ACP, 0, (LPCSTR)strGBK.c_str(), -1, (LPWSTR)wszUtf8, len);
len = WideCharToMultiByte(CP_UTF8, 0, (LPCWSTR)wszUtf8, -1, NULL, 0, NULL, NULL);
char *szUtf8 = new char[len + 1];
memset(szUtf8, 0, len + 1);
WideCharToMultiByte(CP_UTF8, 0, (LPCWSTR)wszUtf8, -1, szUtf8, len, NULL, NULL);
//strGBK = szUtf8;   
amp = szUtf8;
delete[] szUtf8;
delete[] wszUtf8;

}

int MyTest()
{
PDF *p = NULL;
CString str, type_page;
int i;
str = "PDFFH1.PDF";
type_page = "B5";
int Font_E = 0, Font_CS = 0;
if ((p = PDF_new()) == (PDF *)0)
i = 0;
PDF_TRY(p)
{
// PDF_set_parameter(p,"compatibility", "1.4");  // 兼容Acrobat 5
PDF_set_parameter(p,"errorpolicy", "return");
PDF_set_parameter(p,"hypertextencoding", "host");


PDF_set_parameter(p, "charref", "true");
PDF_set_parameter(p, "textformat", "utf8");


CString e;
if (PDF_begin_document(p, "d:\\test.pdf", 0, "") == -1)
{
i = 1;
}
PDF_set_info(p, "Creator", "hello.c");
PDF_set_info(p, "Author", "Thomas Merz");
PDF_set_info(p, "Title", "Hello, world (C)!");


PDF_begin_page_ext(p, a4_width, a4_height, "");


//PDF_set_parameter(p, "FontOutline", "a=C:\\WINDOWS\\Fonts\\simhei.ttf");


//int  Font_CS;
//Font_CS = PDF_load_font(p, " STSong-Light ", 0, " ", " UniGB-UTF16-H");


PDF_set_parameter(p, "FontOutline", "gothic=C:\\WINDOWS\\Fonts\\simsun.ttc");
int  nnn = PDF_load_font(p, "gothic:0", 0, "winansi", ""); /* Use MS Gothic */


// int  nnn = PDF_load_font(p, "\xEF\xBB\xBF\xE9\xBB\x91\xE4\xBD\x93", 0, "unicode", "");
//Font_E = PDF_load_font(p, "Helvetica-Bold", 0, "winansi", "");


//PDF_setfont(p,Font_E,10);
//Font_CS=PDF_load_font(p,"STSongStd-Light-Acro",0,"UniGB-UCS2-H","");
//int Font_song = PDF_load_font(p, "a:0", 0, "unicode", "");


PDF_setfont(p, nnn, 24);
//PDF_setcolor(p,"fill","gray",1,0,0,0);
PDF_set_text_pos(p, 200, 700);

char Bom[4] = { 0xEF,0xBB,0xBF,0 };
std::string filenameBom = Bom;

std::string abc = "ab宋体字";
std::string outabc;
ConvertGBKToUtf8(outabc,abc);
filenameBom += outabc;

PDF_show(p, filenameBom.c_str());

PDF_end_page_ext(p, "");
PDF_end_document(p, "");
PDF_delete(p);
}
PDF_CATCH(p)
{
PDF_delete(p);
}
return 0;


}