diff options
Diffstat (limited to 'tex/context/base/font-con.lua')
| -rw-r--r-- | tex/context/base/font-con.lua | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/tex/context/base/font-con.lua b/tex/context/base/font-con.lua index 24b03222c..09293895e 100644 --- a/tex/context/base/font-con.lua +++ b/tex/context/base/font-con.lua @@ -278,6 +278,42 @@ function constructors.aftercopyingcharacters(target,original) -- can be used for additional tweaking end +-- It's probably ok to hash just the indices because there is not that much +-- chance that one will shift slots and leave the others unset then. Anyway, +-- there is of course some overhead here, but it might as well get compensated +-- by less time spent on including the font resource twice. For the moment +-- we default to false, so a macro package has to enable it explicitly. In +-- LuaTeX the fullname is used to identify a font as being unique. + +constructors.sharefonts = false +constructors.nofsharedfonts = 0 +local sharednames = { } + +function constructors.trytosharefont(target,tfmdata) + if constructors.sharefonts then + local characters = target.characters + local n = 1 + local t = { target.psname } + local u = sortedkeys(characters) + for i=1,#u do + n = n + 1 ; t[n] = k + n = n + 1 ; t[n] = characters[u[i]].index or k + end + local h = md5.HEX(concat(t," ")) + local s = sharednames[h] + if s then + if trace_defining then + report_defining("font %a uses backend resources of font %a",target.fullname,s) + end + target.fullname = s + constructors.nofsharedfonts = constructors.nofsharedfonts + 1 + target.properties.sharedwith = s + else + sharednames[h] = target.fullname + end + end +end + function constructors.enhanceparameters(parameters) local xheight = parameters.x_height local quad = parameters.quad @@ -790,9 +826,12 @@ function constructors.scale(tfmdata,specification) end targetcharacters[unicode] = chr end + -- constructors.aftercopyingcharacters(target,tfmdata) -- + constructors.trytosharefont(target,tfmdata) + -- return target end |