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What is the least resource intensive way to generate the luatex font cache for a new font?

Using MinionPro for the main font and Fontspec for the monospaced fontHow to generate compounded diacritical fonts for Sanskrit with XeTeX and LuaTeX?What is the .ttf font for default LaTeX font?how to set font feature file for a specific font file and not the whole font shapeWhat is the default font for LaTeX?What is the best Math Font for use with Minion Pro font?What is the least invasive way to set the font for listings?LuaLatex setup a different font for numbers and the restMaking a new font family based on the default fontWhat is the correct way to make setmainfont take effect?

10

2

When a font is first used with lualatex, luaotfload does some magic to produce font cache files.

For large fonts (e.g., Noto Sans CJK) this can take a lot of time and a lot of memory.

I have an old computer (5 year old MacBook air with 4GB RAM) running Linux with a 4GB swap partition. The initial cache generation of this font can take more than 15 min and render my computer unusable. Sometimes I just run out of memory and the process is killed.

Let's say I want to use the font as such:

documentclassarticle
usepackagefontspec
setmainfont[Script=CJK,Language=Chinese Simplified]Noto Sans CJK SC
begindocument
中文
enddocument

What is the least resource intensive way and/or fastest way to generate the required cache files?

At the moment, I quit everything (even X11) and run lualatex from the console, but it still takes a long time, and quitting everything is a bit of a pain.

fonts luatex fontspec luaotfload

share|improve this question

asked Mar 16 at 4:44

David PurtonDavid Purton

10.9k2941

• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  That is a very good question, but I don't think you can do any better as you do now. Here is Hans' statement about this: mailman.ntg.nl/pipermail/ntg-context/2018/092703.html
  
  – Henri Menke
  Mar 16 at 7:49
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  xelatex might be an alternative if you don't need lua-specifics, just fontspec.
  
  – Joseph
  Mar 16 at 11:23
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @Joseph, yes xelatex has no problems of course. Although I notice something curious with xelatex. I use the true type collection font: NotoSansCJK-Regular.ttc. When I run pdffonts on the the PDF file produced by xelatex it gives: ROREZJ+NotoSansCJKjp-Regular-Identity-H. (Notice jp for Japanese instead of sc for Simplified Chinese as requested). I don't know where the error is though. I guess it xelatex could be embedding the right font from the ttc but with the wrong name.
  
  – David Purton
  Mar 16 at 11:38
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  As an addition to my previous comment: I'm pretty sure the output is correct even though the font reported is always the jp one. All the language specific fonts contain all glyphs and the right language seems to be automatically used by xelatex when you request a language specific font without manually specifying the Language= option of fontspec.
  
  – David Purton
  Mar 16 at 13:11
  

  
  
  
  

add a comment | 

10

2

When a font is first used with lualatex, luaotfload does some magic to produce font cache files.

For large fonts (e.g., Noto Sans CJK) this can take a lot of time and a lot of memory.

I have an old computer (5 year old MacBook air with 4GB RAM) running Linux with a 4GB swap partition. The initial cache generation of this font can take more than 15 min and render my computer unusable. Sometimes I just run out of memory and the process is killed.

Let's say I want to use the font as such:

documentclassarticle
usepackagefontspec
setmainfont[Script=CJK,Language=Chinese Simplified]Noto Sans CJK SC
begindocument
中文
enddocument

What is the least resource intensive way and/or fastest way to generate the required cache files?

At the moment, I quit everything (even X11) and run lualatex from the console, but it still takes a long time, and quitting everything is a bit of a pain.

fonts luatex fontspec luaotfload

share|improve this question

asked Mar 16 at 4:44

David PurtonDavid Purton

10.9k2941

• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  That is a very good question, but I don't think you can do any better as you do now. Here is Hans' statement about this: mailman.ntg.nl/pipermail/ntg-context/2018/092703.html
  
  – Henri Menke
  Mar 16 at 7:49
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  xelatex might be an alternative if you don't need lua-specifics, just fontspec.
  
  – Joseph
  Mar 16 at 11:23
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @Joseph, yes xelatex has no problems of course. Although I notice something curious with xelatex. I use the true type collection font: NotoSansCJK-Regular.ttc. When I run pdffonts on the the PDF file produced by xelatex it gives: ROREZJ+NotoSansCJKjp-Regular-Identity-H. (Notice jp for Japanese instead of sc for Simplified Chinese as requested). I don't know where the error is though. I guess it xelatex could be embedding the right font from the ttc but with the wrong name.
  
  – David Purton
  Mar 16 at 11:38
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  As an addition to my previous comment: I'm pretty sure the output is correct even though the font reported is always the jp one. All the language specific fonts contain all glyphs and the right language seems to be automatically used by xelatex when you request a language specific font without manually specifying the Language= option of fontspec.
  
  – David Purton
  Mar 16 at 13:11
  

  
  
  
  

add a comment | 

When a font is first used with lualatex, luaotfload does some magic to produce font cache files.

For large fonts (e.g., Noto Sans CJK) this can take a lot of time and a lot of memory.

I have an old computer (5 year old MacBook air with 4GB RAM) running Linux with a 4GB swap partition. The initial cache generation of this font can take more than 15 min and render my computer unusable. Sometimes I just run out of memory and the process is killed.

Let's say I want to use the font as such:

documentclassarticle
usepackagefontspec
setmainfont[Script=CJK,Language=Chinese Simplified]Noto Sans CJK SC
begindocument
中文
enddocument

What is the least resource intensive way and/or fastest way to generate the required cache files?

At the moment, I quit everything (even X11) and run lualatex from the console, but it still takes a long time, and quitting everything is a bit of a pain.

fonts luatex fontspec luaotfload

share|improve this question

asked Mar 16 at 4:44

David PurtonDavid Purton

10.9k2941

documentclassarticle
usepackagefontspec
setmainfont[Script=CJK,Language=Chinese Simplified]Noto Sans CJK SC
begindocument
中文
enddocument

share|improve this question

asked Mar 16 at 4:44

David PurtonDavid Purton

10.9k2941

share|improve this question

asked Mar 16 at 4:44

David PurtonDavid Purton

10.9k2941

asked Mar 16 at 4:44

David PurtonDavid Purton

10.9k2941

asked Mar 16 at 4:44

David PurtonDavid Purton

10.9k2941

1 Answer
1

active

oldest

votes

10

You can do as proposed in section 9.2.1 “Trimming fonts“ in Fonts out of ConTeXt and remove all the glyph names in the font.

Adapted to LaTeX and your example:

documentclassarticle
usepackagefontspec,luacode
beginluacode*

fonts.handlers.otf.readers.registerextender 
 name = "remove names from Noto Sans CJK SC",
 action = function(fontdata)
 if string.match(fontdata.metadata.fullname, "Noto Sans CJK SC") then
 texio.write_nl("Trimming font " .. fontdata.metadata.fullname)
 for k, v in next, fontdata.descriptions do
 v.name = nil
 end
 end
 end

endluacode*
setmainfont[Script=CJK,Language=Chinese Simplified]Noto Sans CJK SC
begindocument
中文
enddocument

share|improve this answer

answered Mar 16 at 8:08

Henri MenkeHenri Menke

77k8170284

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Can this solution be problematic in some cases?
  
  – Paul Gaborit
  Mar 16 at 8:21
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @PaulGaborit Yes, anything that wants to access glyphs by name won't work. In ConTeXt there is getnamedglyphdirect which will break. I don't think there is anything like this in LaTeX. Also those name lookups are not very efficient.
  
  – Henri Menke
  Mar 16 at 8:28
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Well, I did manage to successfully generate cache files for Source Han Serif (regular, bold). Chromium was killed to compensate, used up all my RAM, and took half an hour! But it did work. Without your lua code I didn't manage to complete the compile without it being killed. So that's something.
  
  – David Purton
  Mar 16 at 10:57
  

  
  
  
  

add a comment | 

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10

You can do as proposed in section 9.2.1 “Trimming fonts“ in Fonts out of ConTeXt and remove all the glyph names in the font.

Adapted to LaTeX and your example:

documentclassarticle
usepackagefontspec,luacode
beginluacode*

fonts.handlers.otf.readers.registerextender 
 name = "remove names from Noto Sans CJK SC",
 action = function(fontdata)
 if string.match(fontdata.metadata.fullname, "Noto Sans CJK SC") then
 texio.write_nl("Trimming font " .. fontdata.metadata.fullname)
 for k, v in next, fontdata.descriptions do
 v.name = nil
 end
 end
 end

endluacode*
setmainfont[Script=CJK,Language=Chinese Simplified]Noto Sans CJK SC
begindocument
中文
enddocument

share|improve this answer

answered Mar 16 at 8:08

Henri MenkeHenri Menke

77k8170284

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Can this solution be problematic in some cases?
  
  – Paul Gaborit
  Mar 16 at 8:21
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @PaulGaborit Yes, anything that wants to access glyphs by name won't work. In ConTeXt there is getnamedglyphdirect which will break. I don't think there is anything like this in LaTeX. Also those name lookups are not very efficient.
  
  – Henri Menke
  Mar 16 at 8:28
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Well, I did manage to successfully generate cache files for Source Han Serif (regular, bold). Chromium was killed to compensate, used up all my RAM, and took half an hour! But it did work. Without your lua code I didn't manage to complete the compile without it being killed. So that's something.
  
  – David Purton
  Mar 16 at 10:57
  

  
  
  
  

add a comment | 

10

You can do as proposed in section 9.2.1 “Trimming fonts“ in Fonts out of ConTeXt and remove all the glyph names in the font.

Adapted to LaTeX and your example:

documentclassarticle
usepackagefontspec,luacode
beginluacode*

fonts.handlers.otf.readers.registerextender 
 name = "remove names from Noto Sans CJK SC",
 action = function(fontdata)
 if string.match(fontdata.metadata.fullname, "Noto Sans CJK SC") then
 texio.write_nl("Trimming font " .. fontdata.metadata.fullname)
 for k, v in next, fontdata.descriptions do
 v.name = nil
 end
 end
 end

endluacode*
setmainfont[Script=CJK,Language=Chinese Simplified]Noto Sans CJK SC
begindocument
中文
enddocument

share|improve this answer

answered Mar 16 at 8:08

Henri MenkeHenri Menke

77k8170284

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Can this solution be problematic in some cases?
  
  – Paul Gaborit
  Mar 16 at 8:21
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @PaulGaborit Yes, anything that wants to access glyphs by name won't work. In ConTeXt there is getnamedglyphdirect which will break. I don't think there is anything like this in LaTeX. Also those name lookups are not very efficient.
  
  – Henri Menke
  Mar 16 at 8:28
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Well, I did manage to successfully generate cache files for Source Han Serif (regular, bold). Chromium was killed to compensate, used up all my RAM, and took half an hour! But it did work. Without your lua code I didn't manage to complete the compile without it being killed. So that's something.
  
  – David Purton
  Mar 16 at 10:57
  

  
  
  
  

add a comment | 

You can do as proposed in section 9.2.1 “Trimming fonts“ in Fonts out of ConTeXt and remove all the glyph names in the font.

Adapted to LaTeX and your example:

documentclassarticle
usepackagefontspec,luacode
beginluacode*

fonts.handlers.otf.readers.registerextender 
 name = "remove names from Noto Sans CJK SC",
 action = function(fontdata)
 if string.match(fontdata.metadata.fullname, "Noto Sans CJK SC") then
 texio.write_nl("Trimming font " .. fontdata.metadata.fullname)
 for k, v in next, fontdata.descriptions do
 v.name = nil
 end
 end
 end

endluacode*
setmainfont[Script=CJK,Language=Chinese Simplified]Noto Sans CJK SC
begindocument
中文
enddocument

share|improve this answer

answered Mar 16 at 8:08

Henri MenkeHenri Menke

77k8170284

documentclassarticle
usepackagefontspec,luacode
beginluacode*

fonts.handlers.otf.readers.registerextender 
 name = "remove names from Noto Sans CJK SC",
 action = function(fontdata)
 if string.match(fontdata.metadata.fullname, "Noto Sans CJK SC") then
 texio.write_nl("Trimming font " .. fontdata.metadata.fullname)
 for k, v in next, fontdata.descriptions do
 v.name = nil
 end
 end
 end

endluacode*
setmainfont[Script=CJK,Language=Chinese Simplified]Noto Sans CJK SC
begindocument
中文
enddocument

share|improve this answer

answered Mar 16 at 8:08

Henri MenkeHenri Menke

77k8170284

answered Mar 16 at 8:08

Henri MenkeHenri Menke

77k8170284

answered Mar 16 at 8:08

Henri MenkeHenri Menke

77k8170284