[fontloader] sync with Context as of 2015-11-21

6 files changed, 76 insertions, 91 deletions

diff --git a/src/fontloader/misc/fontloader-font-con.lua b/src/fontloader/misc/fontloader-font-con.lua
index 383a403..55d7793 100644
--- a/src/fontloader/misc/fontloader-font-con.lua
+++ b/src/fontloader/misc/fontloader-font-con.lua
@@ -170,8 +170,8 @@ constructors.setfactor()
 
 function constructors.scaled(scaledpoints, designsize) -- handles designsize in sp as well
     if scaledpoints < 0 then
+        local factor = constructors.factor
         if designsize then
-            local factor = constructors.factor
             if designsize > factor then -- or just 1000 / when? mp?
                 return (- scaledpoints/1000) * designsize -- sp's
             else
@@ -700,6 +700,7 @@ function constructors.scale(tfmdata,specification)
         end
         --
         if hasmath then
+            --
             -- todo, just operate on descriptions.math
             local vn = character.next
             if vn then
@@ -736,6 +737,11 @@ function constructors.scale(tfmdata,specification)
                         chr.horiz_variants = t
                     end
                 end
+                -- todo also check mathitalics (or that one can go away)
+            end
+            local vi = character.vert_italic
+            if vi and vi ~= 0 then
+                chr.vert_italic = vi*hdelta
             end
             local va = character.accent
             if va then
diff --git a/src/fontloader/misc/fontloader-font-otf.lua b/src/fontloader/misc/fontloader-font-otf.lua
index 0ca1e98..f709e70 100644
--- a/src/fontloader/misc/fontloader-font-otf.lua
+++ b/src/fontloader/misc/fontloader-font-otf.lua
@@ -1999,9 +1999,10 @@ actions["merge kern classes"] = function(data,filename,raw)
                     local kernclass = subtable.kernclass -- name is inconsistent with anchor_classes
                     local lookup = subtable.lookup or subtable.name
                     if kernclass then -- the next one is quite slow
+                        -- as fas as i can see the kernclass is a table with one entry and offsets
+                        -- have no [1] so we could remov eon elevel (kernclass) and start offsets
+                        -- at 1 but we're too far down the road now to fix that
                         if #kernclass > 0 then
-                            -- it's a table with one entry .. a future luatex can just
-                            -- omit that level
                             kernclass = kernclass[1]
                             lookup    = type(kernclass.lookup) == "string" and kernclass.lookup or lookup
                             report_otf("fixing kernclass table of lookup %a",lookup)
@@ -2028,15 +2029,17 @@ actions["merge kern classes"] = function(data,filename,raw)
                             if splt then
                                 local extrakerns = { }
                                 local baseoffset = (fk-1) * maxseconds
-                                for sk=2,maxseconds do -- will become 1 based in future luatex
-                                    local sv = seconds[sk]
                              -- for sk, sv in next, seconds do
-                                    local splt = split[sv]
-                                    if splt then -- redundant test
-                                        local offset = offsets[baseoffset + sk]
-                                        if offset then
-                                            for i=1,#splt do
-                                                extrakerns[splt[i]] = offset
+                                for sk=2,maxseconds do
+                                    local sv = seconds[sk]
+                                    if sv then
+                                        local splt = split[sv]
+                                        if splt then -- redundant test
+                                            local offset = offsets[baseoffset + sk]
+                                            if offset then
+                                                for i=1,#splt do
+                                                    extrakerns[splt[i]] = offset
+                                                end
                                             end
                                         end
                                     end
@@ -2583,6 +2586,7 @@ local function copytotfm(data,cache_id)
                     -- watch out: luatex uses horiz_variants for the parts
                     --
                     local italic   = m.italic
+                    local vitalic  = m.vitalic
                     --
                     local variants = m.hvariants
                     local parts    = m.hparts
@@ -2623,12 +2627,14 @@ local function copytotfm(data,cache_id)
                         c.vert_variants = parts
                     elseif parts then
                         character.vert_variants = parts
-                        italic = m.vitalic
                     end
                     --
                     if italic and italic ~= 0 then
                         character.italic = italic -- overload
                     end
+                    if vitalic and vitalic ~= 0 then
+                        character.vert_italic = vitalic
+                    end
                     --
                     local accent = m.accent
                     if accent then
diff --git a/src/fontloader/misc/fontloader-font-tfm.lua b/src/fontloader/misc/fontloader-font-tfm.lua
index 401dc83..2dd5768 100644
--- a/src/fontloader/misc/fontloader-font-tfm.lua
+++ b/src/fontloader/misc/fontloader-font-tfm.lua
@@ -25,6 +25,8 @@ local encodings                = fonts.encodings
 
 local tfm                      = constructors.newhandler("tfm")
 tfm.version                    = 1.000
+tfm.maxnestingdepth            = 5
+tfm.maxnestingsize             = 65536*1024
 
 local tfmfeatures              = constructors.newfeatures("tfm")
 local registertfmfeature       = tfmfeatures.register
@@ -45,6 +47,18 @@ supplied by <l n='luatex'/>.</p>
 -- ofm directive blocks local path search unless set; btw, in context we
 -- don't support ofm files anyway as this format is obsolete
 
+-- we need to deal with nested virtual fonts, but because we load in the
+-- frontend we also need to make sure we don't nest too deep (esp when sizes
+-- get large)
+--
+-- (VTITLE Example of a recursion)
+-- (MAPFONT D 0 (FONTNAME recurse)(FONTAT D 2))
+-- (CHARACTER C A (CHARWD D 1)(CHARHT D 1)(MAP (SETRULE D 1 D 1)))
+-- (CHARACTER C B (CHARWD D 2)(CHARHT D 2)(MAP (SETCHAR C A)))
+-- (CHARACTER C C (CHARWD D 4)(CHARHT D 4)(MAP (SETCHAR C B)))
+--
+-- we added the same checks as below to the luatex engine
+
 function tfm.setfeatures(tfmdata,features)
     local okay = constructors.initializefeatures("tfm",tfmdata,features,trace_features,report_tfm)
     if okay then
@@ -54,9 +68,12 @@ function tfm.setfeatures(tfmdata,features)
     end
 end
 
+local depth = { } -- table.setmetatableindex("number")
+
 local function read_from_tfm(specification)
-    local filename = specification.filename
-    local size     = specification.size
+    local filename  = specification.filename
+    local size      = specification.size
+    depth[filename] = (depth[filename] or 0) + 1
     if trace_defining then
         report_defining("loading tfm file %a at size %s",filename,size)
     end
@@ -104,6 +121,25 @@ local function read_from_tfm(specification)
                     end
                     properties.virtualized = true
                     tfmdata.fonts = vfdata.fonts
+                    tfmdata.type = "virtual" -- else nested calls with cummulative scaling
+                    local fontlist = vfdata.fonts
+                    local name = file.nameonly(filename)
+                    for i=1,#fontlist do
+                        local n = fontlist[i].name
+                        local s = fontlist[i].size
+                        local d = depth[filename]
+                        s = constructors.scaled(s,vfdata.designsize)
+                        if d > tfm.maxnestingdepth then
+                            report_defining("too deeply nested virtual font %a with size %a, max nesting depth %s",n,s,tfm.maxnestingdepth)
+                            fontlist[i] = { id = 0 }
+                        elseif (d > 1) and (s > tfm.maxnestingsize) then
+                            report_defining("virtual font %a exceeds size %s",n,s)
+                            fontlist[i] = { id = 0 }
+                        else
+                            local t, id = fonts.constructors.readanddefine(n,s)
+                            fontlist[i] = { id = id }
+                        end
+                    end
                 end
             end
         end
@@ -122,7 +158,10 @@ local function read_from_tfm(specification)
         resources.unicodes      = { }
         resources.lookuptags    = { }
         --
+        depth[filename] = depth[filename] - 1
         return tfmdata
+    else
+        depth[filename] = depth[filename] - 1
     end
 end
 
diff --git a/src/fontloader/misc/fontloader-fonts-demo-vf-1.lua b/src/fontloader/misc/fontloader-fonts-demo-vf-1.lua
index 3878ae6..13acd16 100644
--- a/src/fontloader/misc/fontloader-fonts-demo-vf-1.lua
+++ b/src/fontloader/misc/fontloader-fonts-demo-vf-1.lua
@@ -17,6 +17,7 @@ return function(specification)
             { "special", "pdf:1 0 0 rg" },
             { "special", "pdf:0 1 0 rg" },
             { "special", "pdf:0 0 1 rg" },
+            { "special", "pdf:0 0 1 rg" },
         }
         local chars = {
             identifiers[id1].characters,
@@ -26,7 +27,12 @@ return function(specification)
         for u, v in next, f1.characters do
             local n = math.floor(math.random(1,3)+0.5)
             local c = chars[n][u] or v
-            v.commands = { color[n], { 'slot', n, u }, color[0] }
+            v.commands = {
+                color[n],
+                { 'slot', n, u },
+                color[0],
+                { 'nop' }
+            }
             v.kerns    = nil
             v.width    = c.width
             v.height   = c.height
diff --git a/src/fontloader/misc/fontloader-fonts-otn.lua b/src/fontloader/misc/fontloader-fonts-otn.lua
index 1b99c56..7fafadb 100644
--- a/src/fontloader/misc/fontloader-fonts-otn.lua
+++ b/src/fontloader/misc/fontloader-fonts-otn.lua
@@ -250,7 +250,6 @@ local disccodes          = nodes.disccodes
 local glyph_code         = nodecodes.glyph
 local glue_code          = nodecodes.glue
 local disc_code          = nodecodes.disc
-local whatsit_code       = nodecodes.whatsit
 local math_code          = nodecodes.math
 
 local dir_code           = whatcodes.dir
@@ -316,8 +315,6 @@ local notmatchpre         = { }
 local notmatchpost        = { }
 local notmatchreplace     = { }
 
--- head is always a whatsit so we can safely assume that head is not changed
-
 -- we use this for special testing and documentation
 
 local checkstep       = (nodes and nodes.tracers and nodes.tracers.steppers.check)    or function() end
@@ -3320,43 +3317,6 @@ local function featuresprocessor(head,font,attr)
                                 comprun(start,c_run)
                                 start = getnext(start)
                             end
-                        elseif id == whatsit_code then -- will be function
-                            local subtype = getsubtype(start)
-                            if subtype == dir_code then
-                                local dir = getfield(start,"dir")
-                                if dir == "+TLT" then
-                                    topstack = topstack + 1
-                                    dirstack[topstack] = dir
-                                    rlmode = 1
-                                elseif dir == "+TRT" then
-                                    topstack = topstack + 1
-                                    dirstack[topstack] = dir
-                                    rlmode = -1
-                                elseif dir == "-TLT" or dir == "-TRT" then
-                                    topstack = topstack - 1
-                                    rlmode = dirstack[topstack] == "+TRT" and -1 or 1
-                                else
-                                    rlmode = rlparmode
-                                end
-                                if trace_directions then
-                                    report_process("directions after txtdir %a: parmode %a, txtmode %a, # stack %a, new dir %a",dir,rlparmode,rlmode,topstack,newdir)
-                                end
-                            elseif subtype == localpar_code then
-                                local dir = getfield(start,"dir")
-                                if dir == "TRT" then
-                                    rlparmode = -1
-                                elseif dir == "TLT" then
-                                    rlparmode = 1
-                                else
-                                    rlparmode = 0
-                                end
-                                -- one might wonder if the par dir should be looked at, so we might as well drop the next line
-                                rlmode = rlparmode
-                                if trace_directions then
-                                    report_process("directions after pardir %a: parmode %a, txtmode %a",dir,rlparmode,rlmode)
-                                end
-                            end
-                            start = getnext(start)
                         elseif id == math_code then
                             start = getnext(end_of_math(start))
                         else
@@ -3592,42 +3552,6 @@ local function featuresprocessor(head,font,attr)
                             comprun(start,c_run)
                             start = getnext(start)
                         end
-                    elseif id == whatsit_code then
-                        local subtype = getsubtype(start)
-                        if subtype == dir_code then
-                            local dir = getfield(start,"dir")
-                            if dir == "+TLT" then
-                                topstack = topstack + 1
-                                dirstack[topstack] = dir
-                                rlmode = 1
-                            elseif dir == "+TRT" then
-                                topstack = topstack + 1
-                                dirstack[topstack] = dir
-                                rlmode = -1
-                            elseif dir == "-TLT" or dir == "-TRT" then
-                                topstack = topstack - 1
-                                rlmode = dirstack[topstack] == "+TRT" and -1 or 1
-                            else
-                                rlmode = rlparmode
-                            end
-                            if trace_directions then
-                                report_process("directions after txtdir %a: parmode %a, txtmode %a, # stack %a, new dir %a",dir,rlparmode,rlmode,topstack,newdir)
-                            end
-                        elseif subtype == localpar_code then
-                            local dir = getfield(start,"dir")
-                            if dir == "TRT" then
-                                rlparmode = -1
-                            elseif dir == "TLT" then
-                                rlparmode = 1
-                            else
-                                rlparmode = 0
-                            end
-                            rlmode = rlparmode
-                            if trace_directions then
-                                report_process("directions after pardir %a: parmode %a, txtmode %a",dir,rlparmode,rlmode)
-                            end
-                        end
-                        start = getnext(start)
                     elseif id == math_code then
                         start = getnext(end_of_math(start))
                     else
diff --git a/src/fontloader/misc/fontloader-plain.tex b/src/fontloader/misc/fontloader-plain.tex
index 9902c49..99347ed 100644
--- a/src/fontloader/misc/fontloader-plain.tex
+++ b/src/fontloader/misc/fontloader-plain.tex
@@ -13,6 +13,10 @@
 
 % We assume that pdf is used.
 
+\ifdefined\pdfextension
+    \input luatex-pdf \relax
+\fi
+
 \pdfoutput 1
 
 % We set the page dimensions because otherwise the backend does weird things