diff options
Diffstat (limited to 'tex/context/base/mkxl/font-dsp.lmt')
| -rw-r--r-- | tex/context/base/mkxl/font-dsp.lmt | 172 |
1 files changed, 94 insertions, 78 deletions
diff --git a/tex/context/base/mkxl/font-dsp.lmt b/tex/context/base/mkxl/font-dsp.lmt index 28a1d4e3c..a8dc2e5dc 100644 --- a/tex/context/base/mkxl/font-dsp.lmt +++ b/tex/context/base/mkxl/font-dsp.lmt @@ -237,6 +237,24 @@ local read_integer = { streamreader.readinteger4, } +directives.register("fonts.streamreader",function() + + read_cardinal = { + streamreader.readcardinal1, + streamreader.readcardinal2, + streamreader.readcardinal3, + streamreader.readcardinal4, + } + + read_integer = { + streamreader.readinteger1, + streamreader.readinteger2, + streamreader.readinteger3, + streamreader.readinteger4, + } + +end) + -- Traditionally we use these unique names (so that we can flatten the lookup list -- (we create subsets runtime) but I will adapt the old code to newer names. @@ -433,7 +451,7 @@ local function getfactors(data,instancespec) for i=1,#axis do local a = axis[i] local d = a.default - factors[i] = getaxisscale(segments,a.minimum,d,a.maximum,values[a.name or a.tag] or d) + factors[i] = getaxisscale(segments,a.minimum,d,a.maximum,values[a.name or a.tag] or values[a.tag] or d) end return factors end @@ -4498,6 +4516,66 @@ function readers.fvar(f,fontdata,specification) end end +local function calculate(f,fontdata,specification,offset,field,regions,deltas,nozero) + -- + -- innerIndexBitCountMask = 0x000F + -- mapEntrySizeMask = 0x0030 + -- reservedFlags = 0xFFC0 + -- + -- outerIndex = entry >> ((entryFormat & innerIndexBitCountMask) + 1) + -- innerIndex = entry & ((1 << ((entryFormat & innerIndexBitCountMask) + 1)) - 1) + -- + setposition(f,offset) + local format = readushort(f) -- todo: check + local mapcount = readushort(f) + local entrysize = rshift(band(format,0x0030),4) + 1 + local nofinnerbits = band(format,0x000F) + 1 -- n of inner bits + local innermask = lshift(1,nofinnerbits) - 1 + local readcardinal = read_cardinal[entrysize] -- 1 upto 4 bytes + local innerindex = { } -- size is mapcount + local outerindex = { } -- size is mapcount + for i=0,mapcount-1 do + local mapdata = readcardinal(f) + outerindex[i] = rshift(mapdata,nofinnerbits) + innerindex[i] = band(mapdata,innermask) + end + -- use last entry when no match i + setvariabledata(fontdata,"hvarwidths",true) + local glyphs = fontdata.glyphs + for i=0,fontdata.nofglyphs-1 do + local glyph = glyphs[i] + local outer = outerindex[i] or 0 + local inner = innerindex[i] or i + if outer and inner then -- not needed + local delta = deltas[outer+1] + if delta then + local d = delta.deltas[inner+1] + if d then + local scales = delta.scales + local deltaw = field and glyph[field] or 0 + for i=1,#scales do + local di = d[i] + if di then + deltaw = deltaw + scales[i] * di + else + break -- can't happen + end + end + deltaw = round(deltaw) + if nozero and deltaw == 0 then + -- no need for dlsb zero + else + glyph[field] = deltaw + end + end + end + end + end +end + +-- Todo: when it's tested for a while the lsb hackery can be backported from the +-- font-dsp.lmt file. + function readers.hvar(f,fontdata,specification) local factors = specification.factors if not factors then @@ -4508,93 +4586,31 @@ function readers.hvar(f,fontdata,specification) report("no hvar table, expect problems due to messy widths") return end - local version = readulong(f) -- 0x00010000 local variationoffset = tableoffset + readulong(f) -- the store local advanceoffset = tableoffset + readulong(f) local lsboffset = tableoffset + readulong(f) local rsboffset = tableoffset + readulong(f) - - local regions = { } - local variations = { } - local innerindex = { } -- size is mapcount - local outerindex = { } -- size is mapcount - local deltas = { } - - if variationoffset > 0 then - regions, deltas = readvariationdata(f,variationoffset,factors) - end - if not regions then - -- for now .. what to do ? - return - end - - if advanceoffset > 0 then - -- - -- innerIndexBitCountMask = 0x000F - -- mapEntrySizeMask = 0x0030 - -- reservedFlags = 0xFFC0 - -- - -- outerIndex = entry >> ((entryFormat & innerIndexBitCountMask) + 1) - -- innerIndex = entry & ((1 << ((entryFormat & innerIndexBitCountMask) + 1)) - 1) - -- - setposition(f,advanceoffset) - local format = readushort(f) -- todo: check - local mapcount = readushort(f) - local entrysize = rshift(band(format,0x0030),4) + 1 - local nofinnerbits = band(format,0x000F) + 1 -- n of inner bits - local innermask = lshift(1,nofinnerbits) - 1 - local readcardinal = read_cardinal[entrysize] -- 1 upto 4 bytes - for i=0,mapcount-1 do - local mapdata = readcardinal(f) - outerindex[i] = rshift(mapdata,nofinnerbits) - innerindex[i] = band(mapdata,innermask) - end - -- use last entry when no match i - setvariabledata(fontdata,"hvarwidths",true) - local glyphs = fontdata.glyphs - for i=0,fontdata.nofglyphs-1 do - local glyph = glyphs[i] - local width = glyph.width - if width then - local outer = outerindex[i] or 0 - local inner = innerindex[i] or i - if outer and inner then -- not needed - local delta = deltas[outer+1] - if delta then - local d = delta.deltas[inner+1] - if d then - local scales = delta.scales - local deltaw = 0 - for i=1,#scales do - local di = d[i] - if di then - deltaw = deltaw + scales[i] * di - else - break -- can't happen - end - end --- report("index: %i, outer: %i, inner: %i, deltas: %|t, scales: %|t, width: %i, delta %i", --- i,outer,inner,d,scales,width,round(deltaw)) - glyph.width = width + round(deltaw) - end - end - end + if variationoffset > tableoffset then + local regions, deltas = readvariationdata(f,variationoffset,factors) + if regions then + if advanceoffset > tableoffset then + calculate(f,fontdata,specification,advanceoffset,"width",regions,deltas,false) end + -- I don't want to save the lsb as it is the llx that we already store but as + -- we're ahead of reading the bounding box so we cannot set the right lsb here + -- so we set the delta (d) instead. + if lsboffset > tableoffset then + calculate(f,fontdata,specification,lsboffset,"dlsb",regions,deltas,true) -- delta lsb + end + -- if rsboffset > tableoffset then + -- -- we don't use right side bearings + -- end + -- setvariabledata(fontdata,"hregions",regions) end end - -- if lsboffset > 0 then - -- -- we don't use left side bearings - -- end - - -- if rsboffset > 0 then - -- -- we don't use right side bearings - -- end - - -- setvariabledata(fontdata,"hregions",regions) - end function readers.vvar(f,fontdata,specification) |