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Author Topic: TFont Full path  (Read 6259 times)

CanineQwer

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TFont Full path
« on: March 20, 2020, 05:44:19 pm »
I have TFont.
How to get the full path to the font storage location?
Now I take TFont.Name and use it on the command line along with "fc-list" and "grep".
Please suggest a better solution.

*Linux.

wp

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Re: TFont Full path
« Reply #1 on: March 20, 2020, 06:09:39 pm »
There is no cross-platform solution. In TAChart, I use this code:

Code: Pascal  [Select][+][-]
  1. procedure PopulateFontDirList(AList: TStrings);
  2. const
  3.   CSIDL_FONTS = 20;
  4. var
  5.   s: String;
  6. begin
  7.   if AList = nil then
  8.     raise Exception.Create('PopulateFontDirList: list not allocated.');
  9.  
  10.  {$IFDEF WINDOWS}
  11.   s := SHGetFolderPathUTF8(CSIDL_FONTS);
  12.   if s <> '' then
  13.     AList.Add(s);
  14.  {$ENDIF}
  15.  {$IFDEF linux}
  16.   AList.Add('/usr/share/cups/fonts/');
  17.   AList.Add('/usr/share/fonts/truetype/');
  18.   AList.Add('/usr/local/lib/X11/fonts/');
  19.   AList.Add(GetUserDir + '.fonts/');
  20.  {$ENDIF}
  21.  {$IFDEF LCLCarbon}
  22.   AList.Add('/Library/Fonts/');
  23.   AList.Add('/System/Library/Fonts/');
  24.   AList.Add('/Network/Library/Fonts/');
  25.   AList.Add('~/Library/Fonts/');
  26.  {$ENDIF}
  27.  {$IFDEF LCLCocoa}
  28.   AList.Add('/Library/Fonts/');
  29.   AList.Add('/System/Library/Fonts/');
  30.   AList.Add('/Network/Library/Fonts/');
  31.   AList.Add('~/Library/Fonts/');
  32.  {$ENDIF}
  33. end;
  34.  

CanineQwer

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Re: TFont Full path
« Reply #2 on: March 20, 2020, 06:15:08 pm »
I do not need cross-platform.
I specifically need Linux.
It is possible and specifically GTK.

winni

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Re: TFont Full path
« Reply #3 on: March 20, 2020, 06:17:14 pm »
Hi!

For what reasons do you need the path to the font files?

The is the var screen.fonts which is a list of all fonts that Lazarus knows.

And for assigning a font to a component you dont need the path:

MyComponent.Font.Name := 'Arial' ;

Winni


CanineQwer

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Re: TFont Full path
« Reply #4 on: March 20, 2020, 06:27:46 pm »
I know that to use a font, the path is optional.
But I need a font file to transfer it to other people.
So just searching for it manually, as @wp suggested?
Is this the best solution?

winni

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Re: TFont Full path
« Reply #5 on: March 20, 2020, 07:44:06 pm »
Hi!

Okay, Linux only:

Look in /etc/fonts/fonts.conf

In the first lines there are the font directories of your system.
For Suse Linux it is:
Code: Text  [Select][+][-]
  1. <!-- Font directory list -->
  2.  
  3.         <dir>/usr/share/fonts</dir>
  4.         <dir>/usr/X11R6/lib/X11/fonts</dir>
  5.         <dir>/opt/kde3/share/fonts</dir>
  6.          <dir>/usr/local/share/fonts</dir>
  7.         <dir prefix="xdg">fonts</dir>
  8.         <!-- the following element will be removed in the future -->
  9.         <dir>~/.fonts</dir>
  10.  
  11.  

As you see it is XML.

Keep on hacking!
Winni

alanphys

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  • Posts: 56
Re: TFont Full path
« Reply #6 on: July 09, 2020, 06:14:01 pm »
Hi

You can use unit fpTTF in fcl-pdf.

Code: Pascal  [Select][+][-]
  1. function GetFontFile(fName:string):string;
  2. var lFC:TFPFontCacheItem;
  3. begin
  4. gTTFontCache.ReadStandardFonts;
  5. lFC := gTTFontCache.Find(fName, fBold, fItalic);
  6. Result := lFC.FileName;
  7. end;
  8.  

My problem is gTTFontCache does not include font aliases. So the component 'default' font's name on my Fedora system is Sans Serif. If I look at the /usr/share/fonts directory there is no Sans Serif font. fc-match gives the Sans Serif font as Bitstream Vera Sans.

Listing Screen.fonts does list the Sans Serif font but I can't get the path to it.

There is an example under lazarus/examples/fontenum that lists the fonts including Serif and Sans Serif but doesn't appear to show how to get file info.

Perhaps the author of fpTTF @Graeme Geldenhys can help.

Regards
Alanphys
Fedora 34 + KDE/QT5, Tinycore 8, Windows XP-10
https://github.com/alanphys

jipété

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  • Posts: 113
Re: TFont Full path
« Reply #7 on: June 24, 2023, 11:29:38 am »
Hello,

You can use unit fpTTF in fcl-pdf.

I tried to use your code in lazarus/examples/fontenum with a little change, like that :
Code: Pascal  [Select][+][-]
  1. function GetFontFile(fName:string): string; // no help available :-(
  2. var
  3.   lFC: TFPFontCacheItem;
  4. begin
  5.   //gTTFontCache.ReadStandardFonts; // moved in FormShow
  6.   lFC := gTTFontCache.FindFont(fName);
  7.   Result := lFC.FileName;
  8. end;
  9.  
  10. procedure TfrmMain.FormShow(Sender: TObject);
  11. begin
  12.   gTTFontCache.ReadStandardFonts; // jpt
  13.   ...
  14.  
  15. procedure TfrmMain.SelectFont;
  16. var
  17.   F: TFont;
  18.   i: integer;
  19.   TTFS: TTrueTypeFontStyles; // set of TTrueTypeFontStyle -- added 19/06/2023 by jpt
  20.  
  21.   function GetFontSize(s: string): Integer;
  22.   begin
  23.     i := pos('*',s);
  24.     if i<>0 then result := StrToInt(Copy(S, 1, i-1)) else result := StrToInt(s);
  25.   end;
  26. begin
  27.   if lbFamily.ItemIndex>=0 then
  28.     if lbCharSet.ItemIndex>=0 then
  29.       if lbStyles.ItemIndex>=0 then
  30.         if lbSizes.ItemIndex>=0 then
  31.         begin
  32.           F := TFont.Create;
  33.           try
  34.             F.Name := lbFamily.Items[lbFamily.ItemIndex];
  35.             F.CharSet := TFontCharSet(ptrint(lbCharSet.Items.Objects[lbCharset.ItemIndex]));
  36.             F.Size := GetFontSize(lbSizes.Items[lbSizes.ItemIndex]);
  37.             // jpt : added edtFullFileName, a TEdit with Align: Bottom
  38.             edtFullFileName.Text := ' Filename = ' + GetFontFile(lbFamily.Items.Strings[lbFamily.ItemIndex]); // jpt
  39.             i := ptrint(lbStyles.Items.Objects[lbStyles.ItemIndex]);
  40.             F.Style := [];
  41.             TTFS := []; // jpt : added for fpTTF
  42. //jpt            if i and 1 <> 0 then F.Style := F.Style + [fsItalic];
  43. //jpt            if i and 2 <> 0 then F.Style := F.Style + [fsBold];
  44.             if i and 1 <> 0 then TTFS := TTFS + [fsItalic]; // new by jpt
  45.             if i and 2 <> 0 then TTFS := TTFS + [fsBold]; // new by jpt
  46.             if chkUnderLine.Checked then F.Style := F.Style + [fsUnderline];
  47.             if chkStrike.Checked then F.Style := F.Style + [fsStrikeOut];
  48.             UpdateFont(F);
  49.             SaveSelection;
  50.           finally
  51.             F.Free;
  52.           end;
  53.         end;
  54. end;
  55.  

Dont't forget :
Code: Pascal  [Select][+][-]
  1. uses
  2.   fpTTF;  // jpt for GetFontFile
  3.  

For the fun, a missing line in RestoreSelection :
Code: Pascal  [Select][+][-]
  1.       ...
  2.       if i<>Sender.ItemIndex then Sender.ItemIndex := i;
  3.       Sender.TopIndex := Sender.ItemIndex // jpt, to display the selected line at power-up;
  4.     end;
  5.   end;
  6. end;
  7.  

And now the problem : if I use fontenum without the changes for getting the full filename (= original fontenumeration), everything works fine.
But if I setup things for retrieval of full filenames using fpTTF unit, some fonts (System-ui) hang program with SIGSEGV.

Linux Debian 11.7 FPC 3.2.2 Laz 2.2.6

Step-by-step for debugging is not available in fpTTF.pp, I don't know why (works fine in mainunit.pas).

AIRFOIL.TTF (in edtFullFileName.Text bottom image) is the first one in my fonts' folder.

Any help welcome, thanks.
« Last Edit: June 24, 2023, 07:30:21 pm by jipété »

 

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