diff options
Diffstat (limited to 'tex/context/base/mkiv/mlib-svg.lua')
| -rw-r--r-- | tex/context/base/mkiv/mlib-svg.lua | 280 |
1 files changed, 175 insertions, 105 deletions
diff --git a/tex/context/base/mkiv/mlib-svg.lua b/tex/context/base/mkiv/mlib-svg.lua index b56c1fd54..f4b3117a6 100644 --- a/tex/context/base/mkiv/mlib-svg.lua +++ b/tex/context/base/mkiv/mlib-svg.lua @@ -75,24 +75,21 @@ if not modules then modules = { } end modules ['mlib-svg'] = { -- One can run into pretty crazy images, like lines that are fills being clipped -- to some width. That's the danger of hiding yourself behind an interface I guess. -local rawget, type, tonumber, tostring, next, setmetatable = rawget, type, tonumber, tostring, next, setmetatable +local rawget, rawset, type, tonumber, tostring, next, setmetatable = rawget, rawset, type, tonumber, tostring, next, setmetatable -local P, S, R, C, Ct, Cs, Cc, Cp, Carg = lpeg.P, lpeg.S, lpeg.R, lpeg.C, lpeg.Ct, lpeg.Cs, lpeg.Cc, lpeg.Cp, lpeg.Carg +local P, S, R, C, Ct, Cs, Cc, Cp, Cg, Cf, Carg = lpeg.P, lpeg.S, lpeg.R, lpeg.C, lpeg.Ct, lpeg.Cs, lpeg.Cc, lpeg.Cp, lpeg.Cg, lpeg.Cf, lpeg.Carg local lpegmatch, lpegpatterns = lpeg.match, lpeg.patterns -local pi, sin, cos, asin, sind, cosd, tan, abs, sqrt = math.pi, math.sin, math.cos, math.asin, math.sind, math.cosd, math.tan, math.abs, math.sqrt +local sqrt = math.sqrt local concat, setmetatableindex, sortedhash = table.concat, table.setmetatableindex, table.sortedhash local gmatch, gsub, find, match, rep = string.gmatch, string.gsub, string.find, string.match, string.rep local formatters, fullstrip = string.formatters, string.fullstrip -local extract = bit32.extract local utfsplit, utfbyte = utf.split, utf.byte local xmlconvert, xmlcollected, xmlcount, xmlfirst, xmlroot = xml.convert, xml.collected, xml.count, xml.first, xml.root local xmltext, xmltextonly = xml.text, xml.textonly local css = xml.css or { } -- testing -local bpfactor = number.dimenfactors.bp - local function xmlinheritattributes(c,pa) local at = c.at local dt = c.dt @@ -134,6 +131,47 @@ local pathtracer = { ["fill-opacity"] = ".75", } +-- This is just an experiment. Todo: reset hash etc. Also implement +-- an option handler. + +local svghash = false do + + local svglast = 0 + local svglist = false + + local function checkhash(t,k) + local n = svglast + 1 + svglast = n + svglist[n] = k + t[k] = n + return n + end + + function metapost.startsvghashing() + svglast = 0 + svglist = { } + svghash = setmetatableindex(checkhash) + end + + function metapost.stopsvghashing() + svglast = 0 + svglist = false + svghash = false + end + + interfaces.implement { + name = "svghashed", + arguments = "integer", + actions = function(n) + local t = svglist and svglist[n] + if t then + context(t) + end + end + } + +end + -- We have quite some closures because otherwise we run into the local variable -- limitations. It doesn't always look pretty now, sorry. I'll clean up this mess -- some day (the usual nth iteration of code). @@ -149,6 +187,8 @@ local pathtracer = { local a2c do + local pi, sin, cos, tan, asin, abs = math.pi, math.sin, math.cos, math.tan, math.asin, math.abs + local d120 = (pi * 120) / 180 local pi2 = 2 * pi @@ -401,6 +441,8 @@ local rgbcomponents, withcolor, thecolor do local f_svggray = formatters['svggray(%.3N)'] local f_svgname = formatters['"%s"'] + local extract = bit32.extract + local triplets = setmetatableindex(function(t,k) -- we delay building all these strings local v = svgcolors[k] @@ -971,6 +1013,8 @@ local f_wrapped_stop = formatters[") shifted (0,%N) scaled %N ;"] local handletransform, handleviewbox do + local sind = math.sind + --todo: better lpeg local f_rotatedaround = formatters[" rotatedaround((%N,%N),%N)"] @@ -1017,7 +1061,7 @@ local handletransform, handleviewbox do local function skewx(x) if x then - return f_slanted_x(math.sind(-x)) + return f_slanted_x(sind(-x)) else return "" end @@ -1025,7 +1069,7 @@ local handletransform, handleviewbox do local function skewy(y) if y then - return f_slanted_y(math.sind(-y)) + return f_slanted_y(sind(-y)) else return "" end @@ -1035,24 +1079,34 @@ local handletransform, handleviewbox do return f_matrix(rx or 1, sx or 0, sy or 0, ry or 1, tx or 0, - (ty or 0)) end - -- how to deal with units here? + -- How to deal with units here? Anyway, order seems to matter. - local p_transform = Cs ( ( - P("translate") * p_numbers / translate -- maybe xy - + P("scale") * p_numbers / scale - + P("rotate") * p_numbers / rotate - + P("matrix") * p_numbers / matrix - + P("skewX") * p_numbers / skewx - + P("skewY") * p_numbers / skewy - -- + p_separator - + P(1)/"" - )^1) + local p_transform = Cf ( Ct("") * ( + lpegpatterns.whitespace^0 * Cg( + C("translate") * (p_numbers / translate) -- maybe xy + + C("scale") * (p_numbers / scale) + + C("rotate") * (p_numbers / rotate) + + C("matrix") * (p_numbers / matrix) + + C("skewX") * (p_numbers / skewx) + + C("skewY") * (p_numbers / skewy) + ) + )^1, rawset) handletransform = function(at) local t = at.transform if t then local e = lpegmatch(p_transform,t) - return s_transform_start, f_transform_stop(e), t + if e then + e = concat({ + e.rotate or "", + e.skewX or "", + e.skewY or "", + e.scale or "", + e.translate or "", + e.matrix or "", + }, " ") + return s_transform_start, f_transform_stop(e), t + end end end @@ -2340,6 +2394,7 @@ do local f_scaled = formatters["\\svgscaled{%N}{%s}{%s}{%s}"] local f_normal = formatters["\\svgnormal{%s}{%s}{%s}"] + local f_hashed = formatters["\\svghashed{%s}"] -- We move to the outer (x,y) and when we have an inner offset we -- (need to) compensate for that outer offset. @@ -2348,8 +2403,14 @@ do -- local f_text_normal_svg = formatters['(svgtext("%s") shifted (%N,%N))'] -- local f_text_simple_svg = formatters['svgtext("%s")'] - local f_text_normal_svg = formatters['(textext.drt("%s") shifted (%N,%N))'] - local f_text_simple_svg = formatters['textext.drt("%s")'] + local anchors = { + ["start"] = "drt", + ["end"] = "dflt", + ["middle"] = "d", + } + + local f_text_normal_svg = formatters['(textext.%s("%s") shifted (%N,%N))'] + local f_text_simple_svg = formatters['textext.%s("%s")'] -- or just maptext @@ -2480,7 +2541,9 @@ do di = gsub(di,"%s+$","") end local chars = utfsplit(di) - if tx then + if svghash then + di = f_hashed(svghash[di]) + elseif tx then for i=1,#chars do chars[i] = f_poschar( (tx[i] or 0) - x, @@ -2540,6 +2603,7 @@ do v_fill = "black" end local color, opacity, invisible = fillproperties(v_fill,at) + local anchor = anchors[at["text-anchor"] or "start"] or "drt" local r = metapost.remappedtext(only) if r then if x == 0 and y == 0 then @@ -2567,9 +2631,9 @@ do result[#result+1] = s_stoplayer result = concat(result) if x == 0 and y == 0 then - result = f_text_simple_svg(result) + result = f_text_simple_svg(anchor,result) else - result = f_text_normal_svg(result,x,y) + result = f_text_normal_svg(anchor,result,x,y) end flushobject(result,at,color,opacity) if trace_text then @@ -2741,7 +2805,7 @@ do definitions = { } tagstyles = { } classstyles = { } - for s in xmlcollected(c,"/style") do + for s in xmlcollected(c,"style") do -- can also be in a def, so let's play safe handlestyle(c) end handlechains(c) @@ -2777,101 +2841,107 @@ end -- a bit more efficient, because we now go to mp and back which is kind of redundant, -- but for now it will do. -function metapost.includesvgfile(filename,offset) -- offset in sp - if lfs.isfile(filename) then +do + + local bpfactor = number.dimenfactors.bp + + function metapost.includesvgfile(filename,offset) -- offset in sp + if lfs.isfile(filename) then + context.startMPcode("doublefun") + context('draw lmt_svg [ filename = "%s", offset = %N ] ;',filename,(offset or 0)*bpfactor) + context.stopMPcode() + end + end + + function metapost.includesvgbuffer(name,offset) -- offset in sp context.startMPcode("doublefun") - context('draw lmt_svg [ filename = "%s", offset = %N ] ;',filename,(offset or 0)*bpfactor) + context('draw lmt_svg [ buffer = "%s", offset = %N ] ;',name or "",(offset or 0)*bpfactor) context.stopMPcode() end -end - -function metapost.includesvgbuffer(name,offset) -- offset in sp - context.startMPcode("doublefun") - context('draw lmt_svg [ buffer = "%s", offset = %N ] ;',name or "",(offset or 0)*bpfactor) - context.stopMPcode() -end -interfaces.implement { - name = "includesvgfile", - actions = metapost.includesvgfile, - arguments = { "string", "dimension" }, -} + interfaces.implement { + name = "includesvgfile", + actions = metapost.includesvgfile, + arguments = { "string", "dimension" }, + } -interfaces.implement { - name = "includesvgbuffer", - actions = metapost.includesvgbuffer, - arguments = { "string", "dimension" }, -} + interfaces.implement { + name = "includesvgbuffer", + actions = metapost.includesvgbuffer, + arguments = { "string", "dimension" }, + } -function metapost.showsvgpage(data) - local dd = data.data - if not dd then - local fn = data.filename - dd = fn and table.load(fn) - end - if type(dd) == "table" then - local comment = data.comment - local offset = data.pageoffset - local index = data.index - local first = math.max(index or 1,1) - local last = math.min(index or #dd,#dd) - for i=first,last do - local d = setmetatableindex( { - data = dd[i], - comment = comment and i or false, - pageoffset = offset or nil, - }, data) - metapost.showsvgpage(d) - end - elseif data.method == "code" then - context.startMPcode(doublefun) - context(metapost.svgtomp(data)) - context.stopMPcode() - else - context.startMPpage { instance = "doublefun", offset = data.pageoffset or nil } - context(metapost.svgtomp(data)) + function metapost.showsvgpage(data) + local dd = data.data + if not dd then + local fn = data.filename + dd = fn and table.load(fn) + end + if type(dd) == "table" then local comment = data.comment - if comment then - context("draw boundingbox currentpicture withcolor .6red ;") - context('draw textext.bot("\\strut\\tttf %s") ysized (10pt) shifted center bottomboundary currentpicture ;',comment) - end - context.stopMPpage() - end -end - -function metapost.typesvgpage(data) - local dd = data.data - if not dd then - local fn = data.filename - dd = fn and table.load(fn) - end - if type(dd) == "table" then - local index = data.index - if index and index > 0 and index <= #dd then - data = dd[index] + local offset = data.pageoffset + local index = data.index + local first = math.max(index or 1,1) + local last = math.min(index or #dd,#dd) + for i=first,last do + local d = setmetatableindex( { + data = dd[i], + comment = comment and i or false, + pageoffset = offset or nil, + }, data) + metapost.showsvgpage(d) + end + elseif data.method == "code" then + context.startMPcode(doublefun) + context(metapost.svgtomp(data)) + context.stopMPcode() else - data = nil + context.startMPpage { instance = "doublefun", offset = data.pageoffset or nil } + context(metapost.svgtomp(data)) + local comment = data.comment + if comment then + context("draw boundingbox currentpicture withcolor .6red ;") + context('draw textext.bot("\\strut\\tttf %s") ysized (10pt) shifted center bottomboundary currentpicture ;',comment) + end + context.stopMPpage() end end - if type(data) == "string" and data ~= "" then - buffers.assign("svgpage",data) - context.typebuffer ({ "svgpage" }, { option = "XML", strip = "yes" }) + + function metapost.typesvgpage(data) + local dd = data.data + if not dd then + local fn = data.filename + dd = fn and table.load(fn) + end + if type(dd) == "table" then + local index = data.index + if index and index > 0 and index <= #dd then + data = dd[index] + else + data = nil + end + end + if type(data) == "string" and data ~= "" then + buffers.assign("svgpage",data) + context.typebuffer ({ "svgpage" }, { option = "XML", strip = "yes" }) + end end -end -function metapost.svgtopdf(data,...) - local mps = metapost.svgtomp(data,...) - if mps then - -- todo: special instance, only basics needed - local pdf = metapost.simple("metafun",mps,true,false,"svg") - if pdf then - return pdf + function metapost.svgtopdf(data,...) + local mps = metapost.svgtomp(data,...) + if mps then + -- todo: special instance, only basics needed + local pdf = metapost.simple("metafun",mps,true,false,"svg") + if pdf then + return pdf + else + -- message + end else -- message end - else - -- message end + end do |