diff options
Diffstat (limited to 'src/fontloader/misc/fontloader-font-dsp.lua')
| -rw-r--r-- | src/fontloader/misc/fontloader-font-dsp.lua | 66 |
1 files changed, 52 insertions, 14 deletions
diff --git a/src/fontloader/misc/fontloader-font-dsp.lua b/src/fontloader/misc/fontloader-font-dsp.lua index 1e8b3bd..49d5929 100644 --- a/src/fontloader/misc/fontloader-font-dsp.lua +++ b/src/fontloader/misc/fontloader-font-dsp.lua @@ -224,10 +224,15 @@ local function readcoverage(f,offset,simple) return coverage end -local function readclassdef(f,offset) +local function readclassdef(f,offset,preset) setposition(f,offset) local classdefformat = readushort(f) local classdef = { } + if type(preset) == "number" then + for k=0,preset-1 do + classdef[k] = 1 + end + end if classdefformat == 1 then local index = readushort(f) local nofclassdef = readushort(f) @@ -249,6 +254,13 @@ local function readclassdef(f,offset) else report("unknown classdef format %a ",classdefformat) end + if type(preset) == "table" then + for k in next, preset do + if not classdef[k] then + classdef[k] = 1 + end + end + end return classdef end @@ -365,7 +377,9 @@ end -- We generalize the chained lookups so that we can do with only one handler -- when processing them. -local function readlookuparray(f,noflookups) +-- pruned + +local function readlookuparray(f,noflookups,nofcurrent) local lookups = { } if noflookups > 0 then local length = 0 @@ -381,10 +395,34 @@ local function readlookuparray(f,noflookups) lookups[index] = false end end + -- if length > nofcurrent then + -- report_issue("more lookups than currently matched characters") + -- end end return lookups end +-- not pruned +-- +-- local function readlookuparray(f,noflookups,nofcurrent) +-- local lookups = { } +-- for i=1,nofcurrent do +-- lookups[i] = false +-- end +-- for i=1,noflookups do +-- local index = readushort(f) + 1 +-- if index > nofcurrent then +-- report_issue("more lookups than currently matched characters") +-- for i=nofcurrent+1,index-1 do +-- lookups[i] = false +-- end +-- nofcurrent = index +-- end +-- lookups[index] = readushort(f) + 1 +-- end +-- return lookups +-- end + local function unchainedcontext(f,fontdata,lookupid,lookupoffset,offset,glyphs,nofglyphs,what) local tableoffset = lookupoffset + offset setposition(f,tableoffset) @@ -409,7 +447,7 @@ local function unchainedcontext(f,fontdata,lookupid,lookupoffset,offset,glyphs,n for i=2,nofcurrent do current[i] = { readushort(f) } end - local lookups = readlookuparray(f,noflookups) + local lookups = readlookuparray(f,noflookups,nofcurrent) rules[#rules+1] = { current = current, lookups = lookups @@ -433,7 +471,7 @@ local function unchainedcontext(f,fontdata,lookupid,lookupoffset,offset,glyphs,n local rules = { } if subclasssets then coverage = readcoverage(f,tableoffset + coverage) - currentclassdef = readclassdef(f,tableoffset + currentclassdef) + currentclassdef = readclassdef(f,tableoffset + currentclassdef,coverage) local currentclasses = classtocoverage(currentclassdef,fontdata.glyphs) for class=1,#subclasssets do local offset = subclasssets[class] @@ -452,7 +490,7 @@ local function unchainedcontext(f,fontdata,lookupid,lookupoffset,offset,glyphs,n for i=2,nofcurrent do current[i] = currentclasses[readushort(f) + 1] end - local lookups = readlookuparray(f,noflookups) + local lookups = readlookuparray(f,noflookups,nofcurrent) rules[#rules+1] = { current = current, lookups = lookups @@ -476,7 +514,7 @@ local function unchainedcontext(f,fontdata,lookupid,lookupoffset,offset,glyphs,n elseif subtype == 3 then local current = readarray(f) local noflookups = readushort(f) - local lookups = readlookuparray(f,noflookups) + local lookups = readlookuparray(f,noflookups,#current) current = readcoveragearray(f,tableoffset,current,true) return { format = "coverage", @@ -536,7 +574,7 @@ local function chainedcontext(f,fontdata,lookupid,lookupoffset,offset,glyphs,nof end end local noflookups = readushort(f) - local lookups = readlookuparray(f,noflookups) + local lookups = readlookuparray(f,noflookups,nofcurrent) rules[#rules+1] = { before = before, current = current, @@ -562,9 +600,9 @@ local function chainedcontext(f,fontdata,lookupid,lookupoffset,offset,glyphs,nof local rules = { } if subclasssets then local coverage = readcoverage(f,tableoffset + coverage) - local beforeclassdef = readclassdef(f,tableoffset + beforeclassdef) - local currentclassdef = readclassdef(f,tableoffset + currentclassdef) - local afterclassdef = readclassdef(f,tableoffset + afterclassdef) + local beforeclassdef = readclassdef(f,tableoffset + beforeclassdef,nofglyphs) + local currentclassdef = readclassdef(f,tableoffset + currentclassdef,coverage) + local afterclassdef = readclassdef(f,tableoffset + afterclassdef,nofglyphs) local beforeclasses = classtocoverage(beforeclassdef,fontdata.glyphs) local currentclasses = classtocoverage(currentclassdef,fontdata.glyphs) local afterclasses = classtocoverage(afterclassdef,fontdata.glyphs) @@ -604,7 +642,7 @@ local function chainedcontext(f,fontdata,lookupid,lookupoffset,offset,glyphs,nof end -- no sequence index here (so why in context as it saves nothing) local noflookups = readushort(f) - local lookups = readlookuparray(f,noflookups) + local lookups = readlookuparray(f,noflookups,nofcurrent) rules[#rules+1] = { before = before, current = current, @@ -632,7 +670,7 @@ local function chainedcontext(f,fontdata,lookupid,lookupoffset,offset,glyphs,nof local current = readarray(f) local after = readarray(f) local noflookups = readushort(f) - local lookups = readlookuparray(f,noflookups) + local lookups = readlookuparray(f,noflookups,#current) before = readcoveragearray(f,tableoffset,before,true) current = readcoveragearray(f,tableoffset,current,true) after = readcoveragearray(f,tableoffset,after,true) @@ -988,8 +1026,8 @@ function gposhandlers.pair(f,fontdata,lookupid,lookupoffset,offset,glyphs,nofgly local nofclasses2 = readushort(f) -- incl class 0 local classlist = readpairclasssets(f,nofclasses1,nofclasses2,format1,format2) coverage = readcoverage(f,tableoffset+coverage) - classdef1 = readclassdef(f,tableoffset+classdef1) - classdef2 = readclassdef(f,tableoffset+classdef2) + classdef1 = readclassdef(f,tableoffset+classdef1,coverage) + classdef2 = readclassdef(f,tableoffset+classdef2,nofglyphs) local usedcoverage = { } for g1, c1 in next, classdef1 do if coverage[g1] then |