diff options
Diffstat (limited to 'otfl-node-fnt.lua')
| -rw-r--r-- | otfl-node-fnt.lua | 205 |
1 files changed, 0 insertions, 205 deletions
diff --git a/otfl-node-fnt.lua b/otfl-node-fnt.lua deleted file mode 100644 index f2d8e1d..0000000 --- a/otfl-node-fnt.lua +++ /dev/null @@ -1,205 +0,0 @@ -if not modules then modules = { } end modules ['node-fnt'] = { - version = 1.001, - comment = "companion to font-ini.mkiv", - author = "Hans Hagen, PRAGMA-ADE, Hasselt NL", - copyright = "PRAGMA ADE / ConTeXt Development Team", - license = "see context related readme files" -} - -local next, type = next, type - -local trace_characters = false trackers.register("nodes.characters", function(v) trace_characters = v end) - -local glyph = node.id('glyph') - -local traverse_id = node.traverse_id -local has_attribute = node.has_attribute - -local starttiming, stoptiming = statistics.starttiming, statistics.stoptiming - -fonts = fonts or { } -fonts.tfm = fonts.tfm or { } -fonts.ids = fonts.ids or { } - -local fontdata = fonts.ids - --- some tests with using an array of dynamics[id] and processes[id] demonstrated --- that there was nothing to gain (unless we also optimize other parts) --- --- maybe getting rid of the intermediate shared can save some time - --- potential speedup: check for subtype < 256 so that we can remove that test --- elsewhere, danger: injected nodes will not be dealt with but that does not --- happen often; we could consider processing sublists but that might need mor --- checking later on; the current approach also permits variants - -if tex.attribute[0] < 0 then - - texio.write_nl("log","!") - texio.write_nl("log","! Attribute 0 is reserved for ConTeXt's font feature management and has to be") - texio.write_nl("log","! set to zero. Also, some attributes in the range 1-255 are used for special") - texio.write_nl("log","! purposed so setting them at the TeX end might break the font handler.") - texio.write_nl("log","!") - - tex.attribute[0] = 0 -- else no features - -end - -function nodes.process_characters(head) - -- either next or not, but definitely no already processed list - starttiming(nodes) - local usedfonts, attrfonts, done = { }, { }, false - local a, u, prevfont, prevattr = 0, 0, nil, 0 - for n in traverse_id(glyph,head) do - local font, attr = n.font, has_attribute(n,0) -- zero attribute is reserved for fonts in context - if attr and attr > 0 then - if font ~= prevfont or attr ~= prevattr then - local used = attrfonts[font] - if not used then - used = { } - attrfonts[font] = used - end - if not used[attr] then - -- we do some testing outside the function - local tfmdata = fontdata[font] - local shared = tfmdata.shared - if shared then - local dynamics = shared.dynamics - if dynamics then - local d = shared.set_dynamics(font,dynamics,attr) -- still valid? - if d then - used[attr] = d - a = a + 1 - end - end - end - end - prevfont, prevattr = font, attr - end - elseif font ~= prevfont then - prevfont, prevattr = font, 0 - local used = usedfonts[font] - if not used then - local tfmdata = fontdata[font] - if tfmdata then - local shared = tfmdata.shared -- we need to check shared, only when same features - if shared then - local processors = shared.processes - if processors and #processors > 0 then - usedfonts[font] = processors - u = u + 1 - end - end - else - -- probably nullfont - end - end - else - prevattr = attr - end - end - -- we could combine these and just make the attribute nil - if u == 1 then - local font, processors = next(usedfonts) - local n = #processors - if n > 0 then - local h, d = processors[1](head,font,false) - head, done = h or head, done or d - if n > 1 then - for i=2,n do - local h, d = processors[i](head,font,false) - head, done = h or head, done or d - end - end - end - elseif u > 0 then - for font, processors in next, usedfonts do - local n = #processors - local h, d = processors[1](head,font,false) - head, done = h or head, done or d - if n > 1 then - for i=2,n do - local h, d = processors[i](head,font,false) - head, done = h or head, done or d - end - end - end - end - if a == 1 then - local font, dynamics = next(attrfonts) - for attribute, processors in next, dynamics do -- attr can switch in between - local n = #processors - local h, d = processors[1](head,font,attribute) - head, done = h or head, done or d - if n > 1 then - for i=2,n do - local h, d = processors[i](head,font,attribute) - head, done = h or head, done or d - end - end - end - elseif a > 0 then - for font, dynamics in next, attrfonts do - for attribute, processors in next, dynamics do -- attr can switch in between - local n = #processors - local h, d = processors[1](head,font,attribute) - head, done = h or head, done or d - if n > 1 then - for i=2,n do - local h, d = processors[i](head,font,attribute) - head, done = h or head, done or d - end - end - end - end - end - stoptiming(nodes) - if trace_characters then - nodes.report(head,done) - end - return head, true -end - -if node.protect_glyphs then - - nodes.protect_glyphs = node.protect_glyphs - nodes.unprotect_glyphs = node.unprotect_glyphs - -else do - - -- initial value subtype : X000 0001 = 1 = 0x01 = char - -- - -- expected before linebreak : X000 0000 = 0 = 0x00 = glyph - -- X000 0010 = 2 = 0x02 = ligature - -- X000 0100 = 4 = 0x04 = ghost - -- X000 1010 = 10 = 0x0A = leftboundary lig - -- X001 0010 = 18 = 0x12 = rightboundary lig - -- X001 1010 = 26 = 0x1A = both boundaries lig - -- X000 1100 = 12 = 0x1C = leftghost - -- X001 0100 = 20 = 0x14 = rightghost - - function nodes.protect_glyphs(head) - local done = false - for g in traverse_id(glyph,head) do - local s = g.subtype - if s == 1 then - done, g.subtype = true, 256 - elseif s <= 256 then - done, g.subtype = true, 256 + s - end - end - return done - end - - function nodes.unprotect_glyphs(head) - local done = false - for g in traverse_id(glyph,head) do - local s = g.subtype - if s > 256 then - done, g.subtype = true, s - 256 - end - end - return done - end - -end end |