c++ - PoDoFo c++ PDF库，润色字符

Question

我在 PoDoFo 中编码波兰语字符时遇到问题图书馆。

此代码生成单词“Łódź”的无效编码

#include <podofo/podofo.h>

using namespace PoDoFo;

int main(int argc, char *argv[], char *env[]) {
    PdfStreamedDocument document("polish.pdf");
    PdfPainter painter;
    PdfPage* pPage;


    pPage = document.CreatePage( PdfPage::CreateStandardPageSize( ePdfPageSize_A4 ) );
    painter.SetPage( pPage );
    PdfFont* pFont = document.CreateFont("Helvetica");
//  PdfFont* pFont = document.CreateFont("Helvetica", new PdfIdentityEncoding(0, 0xffff, true) );
    PdfString pString("Polish word: Łódź");
//  PdfString pString(reinterpret_cast<const pdf_utf8*>("Polish word: Łódź"));

    painter.SetFont( pFont );
    painter.DrawText( 100.0, pPage->GetPageSize().GetHeight()-100.0, pString );
    painter.FinishPage();
    document.Close();

    return 0;
}

在输出pdf中有

Polish word: ņÃ3dÅo

我尝试更改源字符串的编码(使用示例代码中的注释行)，但都失败了。

谁能解释一下如何使用 PoDoFo 库创建包含非 ASCII 字符的 PDF 文档？

Answer 1

#include <podofo/podofo.h>

using namespace PoDoFo;

int main(int argc, char *argv[], char *env[]) {
    PdfStreamedDocument document("polish.pdf");
    PdfPainter painter;
    PdfPage* pPage;


    pPage = document.CreatePage( PdfPage::CreateStandardPageSize( ePdfPageSize_A4 ) );
    painter.SetPage( pPage );
    const PdfEncoding* pEncoding = new PdfIdentityEncoding(); // required for UTF8 characters
    PdfFont *pFont = document.CreateFont("LiberationSerif", false, false, pEncoding ); // LiberationSerif has polish characters 
    PdfString pString(reinterpret_cast<const pdf_utf8*>("Polish word: Łódź")); // Need to cast input string into pdf_utf8
    painter.SetFont( pFont );
    painter.DrawText( 100.0, pPage->GetPageSize().GetHeight()-100.0, pString );
    painter.FinishPage();
    document.Close();

    return 0;
}

这段代码对我有用。