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Fastreport3.14的中文PDF输出
作者:武汉SEO闵涛  文章来源:敏韬网  点击数3532  更新时间:2009/4/23 18:26:28  文章录入:mintao  责任编辑:mintao

参考 《让Fastreport3.x支持中文PDF的输出》一文,确实可以支持中文。但是发现两个问题:

1、只能在Adobe Reader下打开,在Foxit Reader下空白。

2、用Adobe Acrobat或者Adobe Reader打开时提示rebuild,关闭时提示save

研究了一下Fastreport3.14和3.07的源代码,发现关于字体这部分重新调整了。在3.07下,每个type0的字体有三个obj表示,而在3.14下只用两个obj(把FontDescriptor放进实际字体中去了)。3.14中源代码中有个小bug,漏掉了实际字体obj的ref(原frxPDFfile.pas的985行和986行之间)。Foxit Reader应该是严格按照ref去找obj的,找不到obj,所以显示不出来。Adobe Reader应该不是按ref找的,能够正常显示汉字,但是它会重新ref,所以提示rebuild。

修改后的TfrxPDFFont.SaveToStream替换原来的即可。

镶入字体还不行。有时间再说。3.15的说明中有说增强了PDF导出的功能,期待中。

procedure TfrxPDFFont.SaveToStream(Stream: TStream);
var
  s: string;
  b: TBitmap;
  pm: ^OUTLINETEXTMETRIC;
  FontName: string;
  i: Cardinal;
  pfont: PChar;
  FirstChar, LastChar: Integer;
  MemStream: TMemoryStream;
  MemStream1: TMemoryStream;
  pwidths: PABC;
  Charset: TFontCharSet;

  // support DBCS font name encoding
  function EncodeFontName(AFontName: string): string;
  var
    s: string;
    Index, Len: Integer;
  begin
    // Add Begin by ijia 2004.12.20
    // 修正在简体系统下繁体字体名的问题
    // 只提供 MingLiU, PMingLiU --> 细明体, 新细明体的修正
    s:=UpperCase(AFontName);
    if Copy(s, 1, 7)=''''MINGLIU'''' then
      AFontName:=''''细明体'''';

    if Copy(s, 1, 8)=''''PMINGLIU'''' then
      AFontName:=''''新细明体'''';
    // Add end
    s := '''''''';
    Len := Length(AFontName);
    Index := 0;
    while Index < Len do
    begin
      Index := Index + 1;
      if Byte(AFontName[Index]) > $7F then
        s := s + ''''#'''' + IntToHex(Byte(AFontName[Index]), 2)
      else
        s := s + AFontname[Index];
    end;
    Result := s;
  end;

begin
  inherited SaveToStream(Stream);
  b := TBitmap.Create;
  b.Canvas.Font.Assign(Font);
  b.Canvas.Font.PixelsPerInch := 96;
  b.Canvas.Font.Size := 750;
  i := GetOutlineTextMetrics(b.Canvas.Handle, 0, nil);
  GetMem(pm, i);
  try
    try
      GetOutlineTextMetrics(b.Canvas.Handle, i, pm);
      FirstChar := Ord(pm.otmTextMetrics.tmFirstChar);
      LastChar := Ord(pm.otmTextMetrics.tmLastChar);
      FontName := StringReplace(Font.Name, '''' '''', ''''#20'''', [rfReplaceAll]);
      s := '''''''';
      if fsBold in Font.Style then
        s := s + ''''Bold'''';
      if fsItalic in Font.Style then
        s := s + ''''Italic'''';
      if s <> '''''''' then
        FontName := FontName + '''','''' + s;

      Charset := pm.otmTextMetrics.tmCharSet;
      FontName := EncodeFontName(FontName);

      Parent.XRefAdd(Stream);
      WriteLn(Stream, IntToStr(Index + Parent.FStartFonts) + '''' 0 obj'''');
      WriteLn(Stream, ''''<<'''');
      WriteLn(Stream, ''''/Type /Font'''');
      WriteLn(Stream, ''''/Name /F'''' + IntToStr(Index - 1));
      WriteLn(Stream, ''''/BaseFont /'''' + FontName);

      // Add by ijia 2004.12.20
      //if Charset <> CHINESEBIG5_CHARSET then
      if not (Charset in [CHINESEBIG5_CHARSET, GB2312_CHARSET]) then
        WriteLn(Stream, ''''/Subtype /TrueType'''')
      else
        WriteLn(Stream, ''''/Subtype /Type0'''');

      case Charset of
        SYMBOL_CHARSET, ANSI_CHARSET:
          WriteLn(Stream, ''''/Encoding /WinAnsiEncoding'''');

        RUSSIAN_CHARSET: {1251}
          begin
            WriteLn(Stream, ''''/Encoding <</Type/Encoding /BaseEncoding /WinAnsiEncoding'''');
            Write(Stream, ''''/Differences [129 /afii10052'''');
            Write(Stream, ''''/quotesinglbase/afii10100/quotedblbase/ellipsis/dagger/daggerdbl/Euro/perthousand/afii10058/guilsinglleft/afii10059/afii10061/afii10060/afii10145/afii10099/quoteleft'''');
            Write(Stream, ''''/quoteright/quotedblleft/quotedblright/bullet/endash/emdash/space/trademark/afii10106/guilsinglright/afii10107/afii10109/afii10108/afii10193/space/afii10062'''');
            Write(Stream, ''''/afii10110/afii10057/currency/afii10050/brokenbar/section/afii10023/copyright/afii10053/guillemotleft/logicalnot/hyphen/registered/afii10056/degree/plusminus'''');
            Write(Stream, ''''/afii10055/afii10103/afii10098/mu/paragraph/periodcentered/afii10071/afii61352/afii10101/guillemotright/afii10105/afii10054/afii10102/afii10104/afii10017/afii10018'''');
            Write(Stream, ''''/afii10019/afii10020/afii10021/afii10022/afii10024/afii10025/afii10026/afii10027/afii10028/afii10029/afii10030/afii10031/afii10032/afii10033/afii10034/afii10035'''');
            Write(Stream, ''''/afii10036/afii10037/afii10038/afii10039/afii10040/afii10041/afii10042/afii10043/afii10044/afii10045/afii10046/afii10047/afii10048/afii10049/afii10065/afii10066'''');
            Write(Stream, ''''/afii10067/afii10068/afii10069/afii10070/afii10072/afii10073/afii10074/afii10075/afii10076/afii10077/afii10078/afii10079/afii10080/afii10081/afii10082/afii10083'''');
            WriteLn(Stream, ''''/afii10084/afii10085/afii10086/afii10087/afii10088/afii10089/afii10090/afii10091/afii10092/afii10093/afii10094/afii10095/afii10096/afii10097/space]'''');
            WriteLn(Stream, ''''>>'''');
          end;

        EASTEUROPE_CHARSET: {1250}
          begin
            WriteLn(Stream, ''''/Encoding <</Type/Encoding /BaseEncoding /WinAnsiEncoding'''');
            Write(Stream, ''''/Differences [128 /Euro 140 /Sacute /Tcaron /Zcaron /Zacute'''');
            Write(Stream, '''' 156 /sacute /tcaron /zcaron /zacute 161 /caron /breve /Lslash'''');
            Write(Stream, '''' 165 /Aogonek 170 /Scedilla 175 /Zdotaccent 178 /ogonek /lslash'''');
            Write(Stream, '''' 185 /aogonek /scedilla 188 /Lcaron /hungarumlaut /lcaron /zdotaccent /Racute'''');
            Write(Stream, '''' 195 /Abreve 197 /Lacute /Cacute 200 /Ccaron 202 /Eogonek 204 /Ecaron 207 /Dcaron /Dslash'''');
            Write(Stream, '''' 209 /Nacute /Ncaron /Oacute 213 /Ohungarumlaut 216 /Rcaron /Uring 219 /Uhungarumlaut'''');
            Write(Stream, '''' 222 /Tcedilla 224 /racute 227 /abreve 229 /lacute /cacute /ccedilla /ccaron'''');
            Write(Stream, '''' 234 /eogonek 236 /ecaron 239 /dcaron /dmacron /nacute /ncaron 245 /ohungarumlaut'''');
            Write(Stream, '''' 248 /rcaron /uring 251 /uhungarumlaut 254 /tcedilla /dotaccent]'''');
            WriteLn(Stream, ''''>>'''');
          end;

        GREEK_CHARSET: {1253}
          begin
            WriteLn(Stream, ''''/Encoding <</Type/Encoding /BaseEncoding /WinAnsiEncoding'''');
            Write(Stream, ''''/Differences [ 128 /Euro 160 /quoteleft/quoteright 175 /afii00208'''');
            Write(Stream, '''' 180 /tonos/dieresistonos/Alpha

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