1if not modules then modules = { } end modules ['mlib-svg'] = {
2 version = 1.001,
3 optimize = true,
4 comment = "companion to mlib-ctx.mkiv",
5 author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
6 copyright = "PRAGMA ADE / ConTeXt Development Team",
7 license = "see context related readme files",
8}
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106local rawget, rawset, type, tonumber, tostring, next, setmetatable = rawget, rawset, type, tonumber, tostring, next, setmetatable
107
108local 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
109
110local lpegmatch, lpegpatterns = lpeg.match, lpeg.patterns
111local sqrt, abs = math.sqrt, math.abs
112local concat, setmetatableindex, sortedhash = table.concat, table.setmetatableindex, table.sortedhash
113local gmatch, gsub, find, match = string.gmatch, string.gsub, string.find, string.match
114local formatters, fullstrip = string.formatters, string.fullstrip
115local utfsplit, utfbyte = utf.split, utf.byte
116
117local xmlconvert, xmlcollected, xmlcount, xmlfirst, xmlroot, xmlall = xml.convert, xml.collected, xml.count, xml.first, xml.root, xml.all
118local xmltext, xmltextonly = xml.text, xml.textonly
119local css = xml.css or { }
120
121local function xmlinheritattributes(c,pa)
122 if not c.special then
123 local at = c.at
124 local dt = c.dt
125 if at and dt then
126 if pa then
127 setmetatableindex(at,pa)
128 end
129 for i=1,#dt do
130 local dti = dt[i]
131 if type(dti) == "table" then
132 xmlinheritattributes(dti,at)
133 end
134 end
135 end
136 end
137end
138
139xml.inheritattributes = xmlinheritattributes
140
141
142
143metapost = metapost or { }
144local metapost = metapost
145local context = context
146
147local report = logs.reporter("metapost","svg")
148
149local trace = false trackers.register("metapost.svg", function(v) trace = v end)
150local trace_text = false trackers.register("metapost.svg.text", function(v) trace_text = v end)
151local trace_path = false trackers.register("metapost.svg.path", function(v) trace_path = v end)
152local trace_result = false trackers.register("metapost.svg.result", function(v) trace_result = v end)
153local trace_colors = false trackers.register("metapost.svg.colors", function(v) trace_colors = v end)
154local trace_fonts = false trackers.register("metapost.svg.fonts", function(v) trace_fonts = v end)
155
156
157
158local s_draw_image_start <const> = "draw image ("
159local s_draw_image_stop <const> = ") ;"
160
161local ignoredopacity = 1
162
163local svghash = false do
164
165 local svglast = 0
166 local svglist = false
167
168 local function checkhash(t,k)
169 local n = svglast + 1
170 svglast = n
171 svglist[n] = k
172 t[k] = n
173 return n
174 end
175
176 function metapost.startsvghashing()
177 svglast = 0
178 svglist = { }
179 svghash = setmetatableindex(checkhash)
180 end
181
182 function metapost.stopsvghashing()
183 svglast = 0
184 svglist = false
185 svghash = false
186 end
187
188 interfaces.implement {
189 name = "svghashed",
190 arguments = "integer",
191 actions = function(n)
192 local t = svglist and svglist[n]
193 if t then
194 context(t)
195 end
196 end
197 }
198
199end
200
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212
213
214local a2c do
215
216 local pi, sin, cos, tan, asin, abs = math.pi, math.sin, math.cos, math.tan, math.asin, math.abs
217
218 local d120 = (pi * 120) / 180
219 local pi2 = 2 * pi
220
221 a2c = function(x1, y1, rx, ry, angle, large, sweep, x2, y2, f1, f2, cx, cy)
222
223 if (rx == 0 or ry == 0) or (x1 == x2 and y1 == y2) then
224 return { x1, y1, x2, y2, x2, y2 }
225 end
226
227 local recursive = f1
228 local rad = pi / 180 * angle
229 local res = nil
230 local cosrad = cos(-rad)
231 local sinrad = sin(-rad)
232
233 if not recursive then
234
235 x1, y1 = x1 * cosrad - y1 * sinrad, x1 * sinrad + y1 * cosrad
236 x2, y2 = x2 * cosrad - y2 * sinrad, x2 * sinrad + y2 * cosrad
237
238 local x = (x1 - x2) / 2
239 local y = (y1 - y2) / 2
240 local xx = x * x
241 local yy = y * y
242 local h = xx / (rx * rx) + yy / (ry * ry)
243
244 if h > 1 then
245 h = sqrt(h)
246 rx = h * rx
247 ry = h * ry
248 end
249
250 local rx2 = rx * rx
251 local ry2 = ry * ry
252 local ry2xx = ry2 * xx
253 local rx2yy = rx2 * yy
254 local total = rx2yy + ry2xx
255
256 local k = total == 0 and 0 or sqrt(abs((rx2 * ry2 - rx2yy - ry2xx) / total))
257
258 if large == sweep then
259 k = -k
260 end
261
262 cx = k * rx * y / ry + (x1 + x2) / 2
263 cy = k * -ry * x / rx + (y1 + y2) / 2
264
265 f1 = (y1 - cy) / ry
266 f2 = (y2 - cy) / ry
267
268 f1 = asin((f1 < -1.0 and -1.0) or (f1 > 1.0 and 1.0) or f1)
269 f2 = asin((f2 < -1.0 and -1.0) or (f2 > 1.0 and 1.0) or f2)
270
271 if x1 < cx then f1 = pi - f1 end
272 if x2 < cx then f2 = pi - f2 end
273
274 if f1 < 0 then f1 = pi2 + f1 end
275 if f2 < 0 then f2 = pi2 + f2 end
276
277 if sweep ~= 0 and f1 > f2 then f1 = f1 - pi2 end
278 if sweep == 0 and f2 > f1 then f2 = f2 - pi2 end
279
280 end
281
282 if abs(f2 - f1) > d120 then
283 local f2old = f2
284 local x2old = x2
285 local y2old = y2
286 f2 = f1 + d120 * ((sweep ~= 0 and f2 > f1) and 1 or -1)
287 x2 = cx + rx * cos(f2)
288 y2 = cy + ry * sin(f2)
289 res = a2c(x2, y2, rx, ry, angle, 0, sweep, x2old, y2old, f2, f2old, cx, cy)
290 end
291
292 local c1 = cos(f1)
293 local s1 = sin(f1)
294 local c2 = cos(f2)
295 local s2 = sin(f2)
296
297 local t = tan((f2 - f1) / 4)
298 local hx = 4 * rx * t / 3
299 local hy = 4 * ry * t / 3
300
301 local r = { x1 - hx * s1, y1 + hy * c1, x2 + hx * s2, y2 - hy * c2, x2, y2, unpack(res or { }) }
302
303 if not recursive then
304 cosrad = cos(rad)
305 sinrad = sin(rad)
306
307
308 for i0=1,#r,2 do
309 local i1 = i0 + 1
310 local x = r[i0]
311 local y = r[i1]
312 r[i0] = x * cosrad - y * sinrad
313 r[i1] = x * sinrad + y * cosrad
314 end
315 end
316
317 return r
318 end
319
320end
321
322
323
324local p_digit = lpegpatterns.digit
325local p_hexdigit = lpegpatterns.hexdigit
326local p_space = lpegpatterns.whitespace
327
328local factors = {
329 ["pt"] = 1.25,
330 ["mm"] = 3.543307,
331 ["cm"] = 35.43307,
332 ["px"] = 1,
333 ["pc"] = 15,
334 ["in"] = 90,
335 ["em"] = 12 * 1.25,
336 ["ex"] = 8 * 1.25,
337 ["%"] = 0.1,
338 ["bp"] = 1,
339}
340
341metapost.svgfactors = factors
342
343local percentage_r = 1/100
344local percentage_x = percentage_r
345local percentage_y = percentage_r
346
347local asnumber, asnumber_r, asnumber_x, asnumber_y, asnumber_vx, asnumber_vy
348local asnumber_vx_t, asnumber_vy_t
349local p_number, p_separator, p_optseparator, p_numbers, p_fournumbers, p_path
350local p_number_n, p_number_x, p_number_vx, p_number_y, p_number_vy, p_number_r
351
352do
353
354
355
356 local p_command_x = C(S("Hh"))
357 local p_command_y = C(S("Vv"))
358 local p_command_xy = C(S("CcLlMmQqSsTt"))
359 local p_command_a = C(S("Aa"))
360 local p_command = C(S("Zz"))
361
362 p_optseparator = S("\t\n\r ,")^0
363 p_separator = S("\t\n\r ,")^1
364 p_number = (S("+-")^0 * (p_digit^0 * P(".") * p_digit^1 + p_digit^1 * P(".") + p_digit^1))
365 * (P("e") * S("+-")^0 * p_digit^1)^-1
366
367 local function convert (n) n = tonumber(n) return n end
368 local function convert_p (n,u) n = tonumber(n) if u == true then return n / 100 else return n end end
369 local function convert_r (n,u) n = tonumber(n) if u == true then return percentage_r * n elseif u then return u * n else return n end end
370 local function convert_x (n,u) n = tonumber(n) if u == true then return percentage_x * n elseif u then return u * n else return n end end
371 local function convert_y (n,u) n = tonumber(n) if u == true then return percentage_y * n elseif u then return u * n else return n end end
372 local function convert_vx(n,u) n = tonumber(n) if u == true then return percentage_x * n elseif u then return u * n else return n end end
373 local function convert_vy(n,u) n = - tonumber(n) if u == true then return percentage_y * n elseif u then return u * n else return n end end
374
375 local p_unit = (P("p") * S("txc") + P("e") * S("xm") + S("mc") * P("m") + P("in")) / factors
376 local p_percent = P("%") * Cc(true)
377
378 local c_number_n = C(p_number)
379 local c_number_u = C(p_number) * (p_percent + p_unit)^-1
380
381 p_number_n = c_number_n / convert
382 p_number_u = c_number_u / convert
383 p_number_x = c_number_u / convert_x
384 p_number_vx = c_number_u / convert_vx
385 p_number_y = c_number_u / convert_y
386 p_number_vy = c_number_u / convert_vy
387 p_number_r = c_number_u / convert_r
388 p_number_p = c_number_u / convert_p
389
390 asnumber = function(s) return s and lpegmatch(p_number, s) or 0 end
391 asnumber_r = function(s) return s and lpegmatch(p_number_r, s) or 0 end
392 asnumber_p = function(s) return s and lpegmatch(p_number_p, s) or 0 end
393 asnumber_x = function(s) return s and lpegmatch(p_number_x, s) or 0 end
394 asnumber_y = function(s) return s and lpegmatch(p_number_y, s) or 0 end
395 asnumber_vx = function(s) return s and lpegmatch(p_number_vx,s) or 0 end
396 asnumber_vy = function(s) return s and lpegmatch(p_number_vy,s) or 0 end
397
398 local p_number_vx_t = Ct { (p_number_vx + p_separator)^1 }
399 local p_number_vy_t = Ct { (p_number_vy + p_separator)^1 }
400
401 local zerotable = { 0 }
402
403 asnumber_vx_t = function(s) return s and lpegmatch(p_number_vx_t,s) or zerotable end
404 asnumber_vy_t = function(s) return s and lpegmatch(p_number_vy_t,s) or zerotable end
405
406
407 local p_numbersep = p_number_u + p_separator
408 p_numbers = p_optseparator * P("(") * p_numbersep^0 * p_optseparator * P(")")
409 p_fournumbers = p_numbersep^4
410 p_path = Ct ( (
411 p_command_xy * (p_optseparator * p_number_vx *
412 p_optseparator * p_number_vy )^1
413 + p_command_x * (p_optseparator * p_number_vx )^1
414 + p_command_y * (p_optseparator * p_number_vy )^1
415 + p_command_a * (p_optseparator * p_number_vx *
416 p_optseparator * p_number_vy *
417 p_optseparator * p_number_r *
418 p_optseparator * p_number_n *
419 p_optseparator * p_number_n *
420 p_optseparator * p_number_vx *
421 p_optseparator * p_number_vy )^1
422 + p_command
423 + p_separator
424 )^1 )
425
426
427end
428
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436
437
438local colormap = false
439
440local function prepared(t)
441 if type(t) == "table" then
442 local mapping = t.mapping or { }
443 local mapper = t.mapper
444 local colormap = setmetatableindex(mapping)
445 if mapper then
446 setmetatableindex(colormap,function(t,k)
447 local v = mapper(k)
448 t[k] = v or k
449 return v
450 end)
451 end
452 return colormap
453 else
454 return false
455 end
456end
457
458local colormaps = setmetatableindex(function(t,k)
459 local v = false
460 if type(k) == "string" then
461 v = prepared(table.load(k))
462 elseif type(k) == "table" then
463 v = prepared(k)
464 k = k.name or k
465 end
466 t[k] = v
467 return v
468end)
469
470function metapost.svgcolorremapper(colormap)
471 return colormaps[colormap]
472end
473
474
475
476local colorcomponents, withcolor, thecolor, usedcolors do
477
478 local svgcolors = {
479 aliceblue = 0xF0F8FF, antiquewhite = 0xFAEBD7, aqua = 0x00FFFF, aquamarine = 0x7FFFD4,
480 azure = 0xF0FFFF, beige = 0xF5F5DC, bisque = 0xFFE4C4, black = 0x000000,
481 blanchedalmond = 0xFFEBCD, blue = 0x0000FF, blueviolet = 0x8A2BE2, brown = 0xA52A2A,
482 burlywood = 0xDEB887, cadetblue = 0x5F9EA0, hartreuse = 0x7FFF00, chocolate = 0xD2691E,
483 coral = 0xFF7F50, cornflowerblue = 0x6495ED, cornsilk = 0xFFF8DC, crimson = 0xDC143C,
484 cyan = 0x00FFFF, darkblue = 0x00008B, darkcyan = 0x008B8B, darkgoldenrod = 0xB8860B,
485 darkgray = 0xA9A9A9, darkgreen = 0x006400, darkgrey = 0xA9A9A9, darkkhaki = 0xBDB76B,
486 darkmagenta = 0x8B008B, darkolivegreen = 0x556B2F, darkorange = 0xFF8C00, darkorchid = 0x9932CC,
487 darkred = 0x8B0000, darksalmon = 0xE9967A, darkseagreen = 0x8FBC8F, darkslateblue = 0x483D8B,
488 darkslategray = 0x2F4F4F, darkslategrey = 0x2F4F4F, darkturquoise = 0x00CED1, darkviolet = 0x9400D3,
489 deeppink = 0xFF1493, deepskyblue = 0x00BFFF, dimgray = 0x696969, dimgrey = 0x696969,
490 dodgerblue = 0x1E90FF, firebrick = 0xB22222, floralwhite = 0xFFFAF0, forestgreen = 0x228B22,
491 fuchsia = 0xFF00FF, gainsboro = 0xDCDCDC, ghostwhite = 0xF8F8FF, gold = 0xFFD700,
492 goldenrod = 0xDAA520, gray = 0x808080, green = 0x008000, greenyellow = 0xADFF2F,
493 grey = 0x808080, honeydew = 0xF0FFF0, hotpink = 0xFF69B4, indianred = 0xCD5C5C,
494 indigo = 0x4B0082, ivory = 0xFFFFF0, khaki = 0xF0E68C, lavender = 0xE6E6FA,
495 lavenderblush = 0xFFF0F5, lawngreen = 0x7CFC00, lemonchiffon = 0xFFFACD, lightblue = 0xADD8E6,
496 lightcoral = 0xF08080, lightcyan = 0xE0FFFF, lightgoldenrodyellow = 0xFAFAD2, lightgray = 0xD3D3D3,
497 lightgreen = 0x90EE90, lightgrey = 0xD3D3D3, lightpink = 0xFFB6C1, lightsalmon = 0xFFA07A,
498 lightseagreen = 0x20B2AA, lightskyblue = 0x87CEFA, lightslategray = 0x778899, lightslategrey = 0x778899,
499 lightsteelblue = 0xB0C4DE, lightyellow = 0xFFFFE0, lime = 0x00FF00, limegreen = 0x32CD32,
500 linen = 0xFAF0E6, magenta = 0xFF00FF, maroon = 0x800000, mediumaquamarine = 0x66CDAA,
501 mediumblue = 0x0000CD, mediumorchid = 0xBA55D3, mediumpurple = 0x9370DB, mediumseagreen = 0x3CB371,
502 mediumslateblue = 0x7B68EE, mediumspringgreen = 0x00FA9A, mediumturquoise = 0x48D1CC, mediumvioletred = 0xC71585,
503 midnightblue = 0x191970, mintcream = 0xF5FFFA, mistyrose = 0xFFE4E1, moccasin = 0xFFE4B5,
504 navajowhite = 0xFFDEAD, navy = 0x000080, oldlace = 0xFDF5E6, olive = 0x808000,
505 olivedrab = 0x6B8E23, orange = 0xFFA500, orangered = 0xFF4500, orchid = 0xDA70D6,
506 palegoldenrod = 0xEEE8AA, palegreen = 0x98FB98, paleturquoise = 0xAFEEEE, palevioletred = 0xDB7093,
507 papayawhip = 0xFFEFD5, peachpuff = 0xFFDAB9, peru = 0xCD853F, pink = 0xFFC0CB,
508 plum = 0xDDA0DD, powderblue = 0xB0E0E6, purple = 0x800080, red = 0xFF0000,
509 rosybrown = 0xBC8F8F, royalblue = 0x4169E1, saddlebrown = 0x8B4513, salmon = 0xFA8072,
510 sandybrown = 0xF4A460, seagreen = 0x2E8B57, seashell = 0xFFF5EE, sienna = 0xA0522D,
511 silver = 0xC0C0C0, skyblue = 0x87CEEB, slateblue = 0x6A5ACD, slategray = 0x708090,
512 slategrey = 0x708090, snow = 0xFFFAFA, springgreen = 0x00FF7F, steelblue = 0x4682B4,
513 tan = 0xD2B48C, teal = 0x008080, thistle = 0xD8BFD8, tomato = 0xFF6347,
514 turquoise = 0x40E0D0, violet = 0xEE82EE, wheat = 0xF5DEB3, white = 0xFFFFFF,
515 whitesmoke = 0xF5F5F5, yellow = 0xFFFF00, yellowgreen = 0x9ACD32,
516 }
517
518 local f_rgb = formatters[' withcolor svgcolor(%.3N,%.3N,%.3N)']
519 local f_cmyk = formatters[' withcolor svgcmyk(%.3N,%.3N,%.3N,%.3N)']
520 local f_gray = formatters[' withcolor svggray(%.3N)']
521 local f_rgba = formatters[' withcolor svgcolor(%.3N,%.3N,%.3N) withopacity %.3N']
522 local f_graya = formatters[' withcolor svggray(%.3N) withopacity %.3N']
523 local f_name = formatters[' withcolor "%s"']
524 local f_svgrgb = formatters['svgcolor(%.3N,%.3N,%.3N)']
525 local f_svgcmyk = formatters['svgcmyk(%.3N,%.3N,%.3N,%.3N)']
526 local f_svggray = formatters['svggray(%.3N)']
527 local f_svgname = formatters['"%s"']
528
529 local triplets = setmetatableindex(function(t,k)
530
531 local v = svgcolors[k]
532 if v then
533 v = { ((v>>16)&0xFF)/0xFF, ((v>>8)&0xFF)/0xFF, ((v>>0)&0xFF)/0xFF }
534 else
535 v = false
536 end
537 t[k] = v
538 return v
539 end)
540
541 local p_fraction = C(p_number) * C("%")^-1 / function(a,b) return tonumber(a) / (b and 100 or 255) end
542 local p_angle = C(p_number) * P("deg")^0 / function(a) return tonumber(a) end
543 local p_percent = C(p_number) * P("%") / function(a) return tonumber(a) / 100 end
544 local p_absolute = C(p_number) / tonumber
545
546 local p_left = P("(")
547 local p_right = P(")")
548 local p_a = P("a")^-1
549 local p_r_a_color = p_left
550 * (p_fraction * p_separator^-1)^-3
551 * p_absolute^0
552 * p_right
553 local p_c_k_color = p_left
554 * (p_absolute + p_separator^-1)^-4
555 * p_right
556 local p_h_a_color = p_left
557 * p_angle
558 * p_separator * p_percent
559 * p_separator * p_percent
560 * p_separator^0 * p_absolute^0
561 * p_right
562
563 local colors = attributes.colors
564 local colorvalues = colors.values
565 local colorindex = attributes.list[attributes.private('color')]
566 local hsvtorgb = colors.hsvtorgb
567 local hwbtorgb = colors.hwbtorgb
568 local forcedmodel = colors.forcedmodel
569
570 local function to_rgb(r,g,b)
571 return "rgb",
572 (r == "00" and 0) or (r == "ff" and 1) or (r == "FF" and 1) or (tonumber(r,16)/255),
573 (g == "00" and 0) or (g == "ff" and 1) or (g == "FF" and 1) or (tonumber(g,16)/255),
574 (b == "00" and 0) or (b == "ff" and 1) or (b == "FF" and 1) or (tonumber(b,16)/255)
575 end
576
577 local function to_gray(s)
578 return "gray",
579 (s == "00" and 0) or (s == "ff" and 1) or (s == "FF" and 1) or (tonumber(s,16)/255)
580 end
581
582 local p_splitcolor =
583 P("#") * C(p_hexdigit)^1 / function(a,b,c,d,e,f)
584 if not a then
585 return "gray", 0
586 elseif not b then
587 return to_gray(a..a)
588 elseif not c then
589 return to_gray(a..b)
590 elseif not d then
591 return to_rgb(a..a,b..b,c..c)
592 elseif e and f then
593 return to_rgb(a..b,c..d,e..f)
594 else
595 return "gray", 0
596 end
597 end
598 + P("rgb") * p_a
599 * p_r_a_color / function(r,g,b,a)
600 return "rgb", r or 0, g or 0, b or 0, a or false
601 end
602 + P("cmyk")
603 * p_c_k_color / function(c,m,y,k)
604 return "cmyk", c or 0, m or 0, y or 0, k or 0
605 end
606 + P("hsl") * p_a
607 * p_h_a_color / function(h,s,l,a)
608 local r, g, b = hsvtorgb(h,s,l,a)
609 return "rgb", r or 0, g or 0, b or 0, a or false
610 end
611 + P("hwb") * p_a
612 * p_h_a_color / function(h,w,b,a)
613 local r, g, b = hwbtorgb(h,w,b)
614 return "rgb", r or 0, g or 0, b or 0, a or false
615 end
616
617 function metapost.svgsplitcolor(color)
618 if type(color) == "string" then
619 local what, s1, s2, s3, s4 = lpegmatch(p_splitcolor,color)
620 if not what then
621 local t = triplets[color]
622 if t then
623 what, s1, s2, s3 = "rgb", t[1], t[2], t[3]
624 end
625 end
626 return what, s1, s2, s3, s4
627 else
628 return "gray", 0, false
629 end
630 end
631
632 local function registeredcolor(name)
633 local color = colorindex[name]
634 if color then
635 local v = colorvalues[color]
636 local t = forcedmodel(v[1])
637 if t == 2 then
638 return "gray", v[2]
639 elseif t == 3 then
640 return "rgb", v[3], v[4], v[5]
641 elseif t == 4 then
642 return "cmyk", v[6], v[7], v[8], v[9]
643 else
644
645 end
646 end
647 end
648
649
650
651 local function validcolor(color)
652 if usedcolors then
653 usedcolors[color] = usedcolors[color] + 1
654 end
655 if colormap then
656 local c = colormap[color]
657 local t = type(c)
658 if t == "table" then
659 local what = t[1]
660 if what == "rgb" then
661 return
662 what,
663 tonumber(t[2]) or 0,
664 tonumber(t[3]) or 0,
665 tonumber(t[4]) or 0,
666 tonumber(t[5]) or false
667 elseif what == "cmyk" then
668 return
669 what,
670 tonumber(t[2]) or 0,
671 tonumber(t[3]) or 0,
672 tonumber(t[4]) or 0,
673 tonumber(t[5]) or 0
674 elseif what == "gray" then
675 return
676 what,
677 tonumber(t[2]) or 0,
678 tonumber(t[3]) or false
679 end
680 elseif t == "string" then
681 color = c
682 end
683 end
684 if color == "#000000" then
685 return "rgb", 0, 0, 0
686 elseif color == "#ffffff" then
687 return "rgb", 1, 1, 1
688 else
689 local what, s1, s2, s3, s4 = registeredcolor(color)
690 if not what then
691 what, s1, s2, s3, s4 = lpegmatch(p_splitcolor,color)
692
693 if not what then
694 local t = triplets[color]
695 if t then
696 s1, s2, s3 = t[1], t[2], t[3]
697 what = "rgb"
698 end
699 end
700 end
701 return what, s1, s2, s3, s4
702 end
703 end
704
705 colorcomponents = function(color)
706 local what, s1, s2, s3, s4 = validcolor(color)
707 return s1, s2, s3, s4
708 end
709
710 withcolor = function(color)
711 local what, s1, s2, s3, s4 = validcolor(color)
712 if what == "rgb" then
713 if s4 then
714 if s1 == s2 and s1 == s3 then
715 return f_graya(s1,s4)
716 else
717 return f_rgba(s1,s2,s3,s4)
718 end
719 else
720 if s1 == s2 and s1 == s3 then
721 return f_gray(s1)
722 else
723 return f_rgb(s1,s2,s3)
724 end
725 end
726 elseif what == "cmyk" then
727 return f_cmyk(s1,s2,s3,s4)
728 elseif what == "gray" then
729 if s2 then
730 return f_graya(s1,s2)
731 else
732 return f_gray(s1)
733 end
734 end
735 return f_name(color)
736 end
737
738 thecolor = function(color)
739 local what, s1, s2, s3, s4 = validcolor(color)
740 if what == "rgb" then
741 if s4 then
742 if s1 == s2 and s1 == s3 then
743 return f_svggraya(s1,s4)
744 else
745 return f_svgrgba(s1,s2,s3,s4)
746 end
747 else
748 if s1 == s2 and s1 == s3 then
749 return f_svggray(s1)
750 else
751 return f_svgrgb(s1,s2,s3)
752 end
753 end
754 elseif what == "cmyk" then
755 return f_cmyk(s1,s2,s3,s4)
756 elseif what == "gray" then
757 if s2 then
758 return f_svggraya(s1,s2)
759 else
760 return f_svggray(s1)
761 end
762 end
763 return f_svgname(color)
764 end
765
766end
767
768
769
770local grabpath, grablist do
771
772 local f_moveto = formatters['(%N,%N)']
773 local f_curveto_z = formatters['controls(%N,%N)and(%N,%N)..(%N,%N)']
774 local f_curveto_n = formatters['..controls(%N,%N)and(%N,%N)..(%N,%N)']
775 local f_lineto_z = formatters['(%N,%N)']
776 local f_lineto_n = formatters['--(%N,%N)']
777
778 local m = { __index = function() return 0 end }
779
780
781
782
783 grabpath = function(str)
784 local p = lpegmatch(p_path,str) or { }
785 local np = #p
786 local all = { entries = np, closed = false, curve = false }
787 if np == 0 then
788 return all
789 end
790 setmetatable(p,m)
791 local t = { }
792 local n = 0
793 local i = 0
794 local last = "M"
795 local prev = last
796 local kind = "L"
797 local x, y = 0, 0
798 local x1, y1 = 0, 0
799 local x2, y2 = 0, 0
800 local rx, ry = 0, 0
801 local ar, al = 0, 0
802 local as, ac = 0, nil
803 local mx, my = 0, 0
804 while i < np do
805 i = i + 1
806 local pi = p[i]
807 if type(pi) ~= "number" then
808 last = pi
809 i = i + 1
810 pi = p[i]
811 end
812
813 if last == "c" then
814 x1 = x + pi
815 i = i + 1 ; y1 = y + p[i]
816 i = i + 1 ; x2 = x + p[i]
817 i = i + 1 ; y2 = y + p[i]
818 i = i + 1 ; x = x + p[i]
819 i = i + 1 ; y = y + p[i]
820 goto curveto
821 elseif last == "l" then
822 x = x + pi
823 i = i + 1 ; y = y + p[i]
824 goto lineto
825 elseif last == "h" then
826 x = x + pi
827 goto lineto
828 elseif last == "v" then
829 y = y + pi
830 goto lineto
831 elseif last == "a" then
832 x1 = x
833 y1 = y
834 rx = pi
835 i = i + 1 ; ry = p[i]
836 i = i + 1 ; ar = p[i]
837 i = i + 1 ; al = p[i]
838 i = i + 1 ; as = p[i]
839 i = i + 1 ; x = x + p[i]
840 i = i + 1 ; y = y + p[i]
841 goto arc
842 elseif last == "s" then
843 if prev == "C" then
844 x1 = 2 * x - x2
845 y1 = 2 * y - y2
846 else
847 x1 = x
848 y1 = y
849 end
850 x2 = x + pi
851 i = i + 1 ; y2 = y + p[i]
852 i = i + 1 ; x = x + p[i]
853 i = i + 1 ; y = y + p[i]
854 goto curveto
855 elseif last == "m" then
856 x = x + pi
857 i = i + 1 ; y = y + p[i]
858 goto moveto
859 elseif last == "z" then
860 goto close
861
862 elseif last == "C" then
863 x1 = pi
864 i = i + 1 ; y1 = p[i]
865 i = i + 1 ; x2 = p[i]
866 i = i + 1 ; y2 = p[i]
867 i = i + 1 ; x = p[i]
868 i = i + 1 ; y = p[i]
869 goto curveto
870 elseif last == "L" then
871 x = pi
872 i = i + 1 ; y = p[i]
873 goto lineto
874 elseif last == "H" then
875 x = pi
876 goto lineto
877 elseif last == "V" then
878 y = pi
879 goto lineto
880 elseif last == "A" then
881 x1 = x
882 y1 = y
883 rx = pi
884 i = i + 1 ; ry = p[i]
885 i = i + 1 ; ar = p[i]
886 i = i + 1 ; al = p[i]
887 i = i + 1 ; as = p[i]
888 i = i + 1 ; x = p[i]
889 i = i + 1 ; y = p[i]
890 goto arc
891 elseif last == "S" then
892 if prev == "C" then
893 x1 = 2 * x - x2
894 y1 = 2 * y - y2
895 else
896 x1 = x
897 y1 = y
898 end
899 x2 = pi
900 i = i + 1 ; y2 = p[i]
901 i = i + 1 ; x = p[i]
902 i = i + 1 ; y = p[i]
903 goto curveto
904 elseif last == "M" then
905 x = pi ;
906 i = i + 1 ; y = p[i]
907 goto moveto
908 elseif last == "Z" then
909 goto close
910
911 elseif last == "q" then
912 x1 = x + pi
913 i = i + 1 ; y1 = y + p[i]
914 i = i + 1 ; x2 = x + p[i]
915 i = i + 1 ; y2 = y + p[i]
916 goto quadratic
917 elseif last == "t" then
918 if prev == "C" then
919 x1 = 2 * x - x1
920 y1 = 2 * y - y1
921 else
922 x1 = x
923 y1 = y
924 end
925 x2 = x + pi
926 i = i + 1 ; y2 = y + p[i]
927 goto quadratic
928 elseif last == "Q" then
929 x1 = pi
930 i = i + 1 ; y1 = p[i]
931 i = i + 1 ; x2 = p[i]
932 i = i + 1 ; y2 = p[i]
933 goto quadratic
934 elseif last == "T" then
935 if prev == "C" then
936 x1 = 2 * x - x1
937 y1 = 2 * y - y1
938 else
939 x1 = x
940 y1 = y
941 end
942 x2 = pi
943 i = i + 1 ; y2 = p[i]
944 goto quadratic
945 else
946 goto continue
947 end
948 ::moveto::
949 if n > 0 then
950 n = n + 1 ; t[n] = "&&"
951 end
952 n = n + 1 ; t[n] = f_moveto(x,y)
953 last = last == "M" and "L" or "l"
954 prev = "M"
955 mx = x
956 my = y
957 goto continue
958 ::lineto::
959 n = n + 1 ; t[n] = (n > 0 and f_lineto_n or f_lineto_z)(x,y)
960 prev = "L"
961 goto continue
962 ::curveto::
963 n = n + 1 ; t[n] = (n > 0 and f_curveto_n or f_curveto_z)(x1,y1,x2,y2,x,y)
964 prev = "C"
965 goto continue
966 ::arc::
967 ac = a2c(x1,y1,rx,ry,ar,al,as,x,y)
968 for i=1,#ac,6 do
969 n = n + 1 ; t[n] = (n > 0 and f_curveto_n or f_curveto_z)(
970 ac[i],ac[i+1],ac[i+2],ac[i+3],ac[i+4],ac[i+5]
971 )
972 end
973 prev = "A"
974 goto continue
975 ::quadratic::
976 n = n + 1 ; t[n] = (n > 0 and f_curveto_n or f_curveto_z)(
977 x + 2/3 * (x1-x ), y + 2/3 * (y1-y ),
978 x2 + 2/3 * (x1-x2), y2 + 2/3 * (y1-y2),
979 x2, y2
980 )
981 x = x2
982 y = y2
983 prev = "C"
984 goto continue
985 ::close::
986 if i == np then
987 break
988 else
989 i = i - 1
990 end
991 kind = prev
992 prev = "Z"
993
994 x = mx
995 y = my
996 ::continue::
997 end
998 if n > 0 then
999 if prev == "Z" then
1000 all.closed = true
1001 n = n + 1 ; t[n] = "&&cycle"
1002 end
1003 all.path = concat(t,"",1,n)
1004 end
1005 all.curve = kind == "C" or kind == "A"
1006 return all, p
1007 end
1008
1009
1010
1011
1012 grablist = function(p)
1013 local np = #p
1014 if np == 0 then
1015 return nil
1016 end
1017 local t = { }
1018 local n = 0
1019 local a = 0
1020 local i = 0
1021 local last = "M"
1022 local prev = last
1023 local kind = "L"
1024 local x, y = 0, 0
1025 local x1, y1 = 0, 0
1026 local x2, y2 = 0, 0
1027 local rx, ry = 0, 0
1028 local ar, al = 0, 0
1029 local as, ac = 0, nil
1030 local mx, my = 0, 0
1031 while i < np do
1032 i = i + 1
1033 local pi = p[i]
1034 if type(pi) ~= "number" then
1035 last = pi
1036 i = i + 1
1037 pi = p[i]
1038 end
1039
1040 if last == "c" then
1041 x1 = x + pi
1042 i = i + 1 ; y1 = y + p[i]
1043 i = i + 1 ; x2 = x + p[i]
1044 i = i + 1 ; y2 = y + p[i]
1045 i = i + 1 ; x = x + p[i]
1046 i = i + 1 ; y = y + p[i]
1047 goto curveto
1048 elseif last == "l" then
1049 x = x + pi
1050 i = i + 1 ; y = y + p[i]
1051 goto lineto
1052 elseif last == "h" then
1053 x = x + pi
1054 goto lineto
1055 elseif last == "v" then
1056 y = y + pi
1057 goto lineto
1058 elseif last == "a" then
1059 x1 = x
1060 y1 = y
1061 rx = pi
1062 i = i + 1 ; ry = p[i]
1063 i = i + 1 ; ar = p[i]
1064 i = i + 1 ; al = p[i]
1065 i = i + 1 ; as = p[i]
1066 i = i + 1 ; x = x + p[i]
1067 i = i + 1 ; y = y + p[i]
1068 goto arc
1069 elseif last == "s" then
1070 if prev == "C" then
1071 x1 = 2 * x - x2
1072 y1 = 2 * y - y2
1073 else
1074 x1 = x
1075 y1 = y
1076 end
1077 x2 = x + pi
1078 i = i + 1 ; y2 = y + p[i]
1079 i = i + 1 ; x = x + p[i]
1080 i = i + 1 ; y = y + p[i]
1081 goto curveto
1082 elseif last == "m" then
1083 x = x + pi
1084 i = i + 1 ; y = y + p[i]
1085 goto moveto
1086 elseif last == "z" then
1087 goto close
1088
1089 elseif last == "C" then
1090 x1 = pi
1091 i = i + 1 ; y1 = p[i]
1092 i = i + 1 ; x2 = p[i]
1093 i = i + 1 ; y2 = p[i]
1094 i = i + 1 ; x = p[i]
1095 i = i + 1 ; y = p[i]
1096 goto curveto
1097 elseif last == "L" then
1098 x = pi
1099 i = i + 1 ; y = p[i]
1100 goto lineto
1101 elseif last == "H" then
1102 x = pi
1103 goto lineto
1104 elseif last == "V" then
1105 y = pi
1106 goto lineto
1107 elseif last == "A" then
1108 x1 = x
1109 y1 = y
1110 rx = pi
1111 i = i + 1 ; ry = p[i]
1112 i = i + 1 ; ar = p[i]
1113 i = i + 1 ; al = p[i]
1114 i = i + 1 ; as = p[i]
1115 i = i + 1 ; x = p[i]
1116 i = i + 1 ; y = p[i]
1117 goto arc
1118 elseif last == "S" then
1119 if prev == "C" then
1120 x1 = 2 * x - x2
1121 y1 = 2 * y - y2
1122 else
1123 x1 = x
1124 y1 = y
1125 end
1126 x2 = pi
1127 i = i + 1 ; y2 = p[i]
1128 i = i + 1 ; x = p[i]
1129 i = i + 1 ; y = p[i]
1130 goto curveto
1131 elseif last == "M" then
1132 x = pi ;
1133 i = i + 1 ; y = p[i]
1134 goto moveto
1135 elseif last == "Z" then
1136 goto close
1137
1138 elseif last == "q" then
1139 x1 = x + pi
1140 i = i + 1 ; y1 = y + p[i]
1141 i = i + 1 ; x2 = x + p[i]
1142 i = i + 1 ; y2 = y + p[i]
1143 goto quadratic
1144 elseif last == "t" then
1145 if prev == "C" then
1146 x1 = 2 * x - x1
1147 y1 = 2 * y - y1
1148 else
1149 x1 = x
1150 y1 = y
1151 end
1152 x2 = x + pi
1153 i = i + 1 ; y2 = y + p[i]
1154 goto quadratic
1155 elseif last == "Q" then
1156 x1 = pi
1157 i = i + 1 ; y1 = p[i]
1158 i = i + 1 ; x2 = p[i]
1159 i = i + 1 ; y2 = p[i]
1160 goto quadratic
1161 elseif last == "T" then
1162 if prev == "C" then
1163 x1 = 2 * x - x1
1164 y1 = 2 * y - y1
1165 else
1166 x1 = x
1167 y1 = y
1168 end
1169 x2 = pi
1170 i = i + 1 ; y2 = p[i]
1171 goto quadratic
1172 else
1173 goto continue
1174 end
1175 ::moveto::
1176 n = n + 1 ; t[n] = x
1177 n = n + 1 ; t[n] = y
1178 last = last == "M" and "L" or "l"
1179 prev = "M"
1180 mx = x
1181 my = y
1182 goto continue
1183 ::lineto::
1184 n = n + 1 ; t[n] = x
1185 n = n + 1 ; t[n] = y
1186 prev = "L"
1187 goto continue
1188 ::curveto::
1189 n = n + 1 ; t[n] = x
1190 n = n + 1 ; t[n] = y
1191 prev = "C"
1192 goto continue
1193 ::arc::
1194 ac = a2c(x1,y1,rx,ry,ar,al,as,x,y)
1195 for i=1,#ac,6 do
1196 n = n + 1 ; t[n] = ac[i+4]
1197 n = n + 1 ; t[n] = ac[i+5]
1198 end
1199 prev = "A"
1200 goto continue
1201 ::quadratic::
1202 n = n + 1 ; t[n] = x2
1203 n = n + 1 ; t[n] = y2
1204 x = x2
1205 y = y2
1206 prev = "C"
1207 goto continue
1208 ::close::
1209 n = n + 1 ; t[n] = mx
1210 n = n + 1 ; t[n] = my
1211 if i == np then
1212 break
1213 end
1214 kind = prev
1215 prev = "Z"
1216 x = mx
1217 y = my
1218 ::continue::
1219 end
1220 return t
1221 end
1222
1223end
1224
1225
1226
1227local s_wrapped_start <const> = "draw image ("
1228local f_wrapped_stop = formatters[") shifted (0,%N) scaled %N ;"]
1229
1230local handletransform, handleviewbox do
1231
1232 local sind = math.sind
1233
1234 local f_rotatedaround = formatters["rotatedaround((%N,%N),%N) "]
1235 local f_rotated = formatters["rotated(%N) "]
1236 local f_shifted = formatters["shifted(%N,%N) "]
1237 local f_slanted_x = formatters["xslanted(%N) "]
1238 local f_slanted_y = formatters["yslanted(%N) "]
1239 local f_scaled = formatters["scaled(%N) "]
1240 local f_xyscaled = formatters["xyscaled(%N,%N) "]
1241 local f_matrix = formatters["transformed bymatrix(%N,%N,%N,%N,%N,%N) "]
1242 local s_transform_start <const> = "draw image ( "
1243 local f_transform_stop = formatters[") %s ; "]
1244
1245 local transforms = { }
1246 local noftransforms = 0
1247
1248 local function rotate(r,x,y)
1249 if r then
1250 noftransforms = noftransforms + 1
1251 if x then
1252 transforms[noftransforms] = f_rotatedaround(x,-(y or x),-r)
1253 else
1254 transforms[noftransforms] = f_rotated(-r)
1255 end
1256 end
1257 end
1258
1259 local function translate(x,y)
1260 if x == 0 then x = false end
1261 if y == 0 then y = false end
1262 if y then
1263 noftransforms = noftransforms + 1
1264 transforms[noftransforms] = f_shifted(x or 0,-y)
1265 elseif x then
1266 noftransforms = noftransforms + 1
1267 transforms[noftransforms] = f_shifted(x,0)
1268 end
1269 end
1270
1271 local function scale(x,y)
1272 if x == 1 then x = false end
1273 if y == 1 then y = false end
1274 if y then
1275 noftransforms = noftransforms + 1
1276 transforms[noftransforms] = f_xyscaled(x or 1,y)
1277 elseif x then
1278 noftransforms = noftransforms + 1
1279 transforms[noftransforms] = f_scaled(x)
1280 end
1281 end
1282
1283 local function skew(x,y)
1284
1285
1286 if x then
1287 noftransforms = noftransforms + 1
1288 transforms[noftransforms] = f_slanted_x(sind(-x))
1289 end
1290 if y then
1291 noftransforms = noftransforms + 1
1292 transforms[noftransforms] = f_slanted_y(sind(-y))
1293 end
1294 end
1295
1296 local function matrix(rx,sx,sy,ry,tx,ty)
1297 if not ty then
1298 ty = 0
1299 end
1300 if not tx then
1301 tx = 0
1302 end
1303 if not sx then
1304 sx = 0
1305 end
1306 if not sy then
1307 sy = 0
1308 end
1309 if not rx then
1310 rx = 1
1311 end
1312 if not ry then
1313 ry = 1
1314 end
1315 noftransforms = noftransforms + 1
1316
1317
1318 transforms[noftransforms] = f_matrix(rx, -sy, -sx, ry, tx, -ty)
1319 end
1320
1321 local p_transform = (
1322 p_space^0 * (
1323 P("translate") * (p_numbers / translate)
1324 + P("scale") * (p_numbers / scale)
1325 + P("rotate") * (p_numbers / rotate)
1326 + P("matrix") * (p_numbers / matrix)
1327 + P("skew") * (p_numbers / skew)
1328 + P("translateX") * (p_numbers / translate)
1329 + P("translateY") * (Cc(false) * p_numbers / translate)
1330 + P("scaleX") * (p_numbers / translate)
1331 + P("scaleY") * (Cc(false) * p_numbers / translate)
1332 + P("skewX") * (p_numbers / skew)
1333 + P("skewY") * (Cc(false) * p_numbers / skew)
1334 )
1335 )^1
1336
1337
1338
1339 local function combined()
1340 if noftransforms == 1 then
1341 return transforms[1]
1342 elseif noftransforms == 2 then
1343 return transforms[2] .. transforms[1]
1344 elseif noftransforms == 3 then
1345 return transforms[3] .. transforms[2] .. transforms[1]
1346 else
1347
1348 local m = noftransforms + 1
1349 for i=1,noftransforms//2 do
1350 local j = m - i
1351 transforms[i], transforms[j] = transforms[j], transforms[i]
1352 end
1353 return concat(transforms,"",1,noftransforms)
1354 end
1355 end
1356
1357 handletransform = function(at,unwrapped)
1358 local t = at.transform
1359 if t then
1360 noftransforms = 0
1361 lpegmatch(p_transform,t)
1362 if noftransforms > 0 then
1363
1364 return s_transform_start, f_transform_stop(combined()), t
1365 end
1366 end
1367 end
1368
1369 handletransformstring = function(s)
1370 if s then
1371 noftransforms = 0
1372 lpegmatch(p_transform,s)
1373 return noftransforms > 0 and combined()
1374 end
1375 end
1376
1377 handleviewbox = function(v)
1378 if v then
1379 local x, y, w, h = lpegmatch(p_fournumbers,v)
1380 if h then
1381 return x, y, w, h
1382 end
1383 end
1384 end
1385
1386end
1387
1388local dashed do
1389
1390
1391
1392 local f_dashed_n = formatters[" dashed dashpattern (%s ) "]
1393 local f_dashed_y = formatters[" dashed dashpattern (%s ) shifted (%N,0) "]
1394
1395 local p_number = p_optseparator/"" * p_number_r
1396 local p_on = Cc(" on ") * p_number
1397 local p_off = Cc(" off ") * p_number
1398 local p_dashed = Cs((p_on * p_off^-1)^1)
1399
1400 dashed = function(s,o)
1401 if not find(s,",") then
1402
1403 s = s .. " " .. s
1404 end
1405 return (o and f_dashed_y or f_dashed_n)(lpegmatch(p_dashed,s),o)
1406 end
1407
1408end
1409
1410do
1411
1412 local handlers = { }
1413 local process = false
1414 local root = false
1415 local result = false
1416 local r = false
1417 local definitions = false
1418 local classstyles = false
1419 local tagstyles = false
1420
1421 local tags = {
1422 ["a"] = true,
1423
1424
1425
1426
1427
1428
1429
1430 ["circle"] = true,
1431 ["clipPath"] = true,
1432
1433
1434 ["defs"] = true,
1435
1436 ["ellipse"] = true,
1437
1438
1439
1440
1441
1442
1443
1444
1445 ["g"] = true,
1446
1447
1448
1449 ["image"] = true,
1450 ["line"] = true,
1451 ["linearGradient"] = true,
1452 ["marker"] = true,
1453
1454
1455
1456
1457 ["path"] = true,
1458 ["pattern"] = true,
1459 ["polygon"] = true,
1460 ["polyline"] = true,
1461 ["radialGradient"] = true,
1462 ["rect"] = true,
1463
1464
1465 ["stop"] = true,
1466 ["style"] = true,
1467 ["svg"] = true,
1468
1469 ["symbol"] = true,
1470 ["text"] = true,
1471
1472
1473 ["tspan"] = true,
1474 ["use"] = true,
1475
1476
1477 }
1478
1479 local usetags = {
1480 ["circle"] = true,
1481 ["ellipse"] = true,
1482 ["g"] = true,
1483 ["image"] = true,
1484 ["line"] = true,
1485 ["path"] = true,
1486 ["polygon"] = true,
1487 ["polyline"] = true,
1488 ["rect"] = true,
1489
1490
1491 }
1492
1493 local pathtracer = {
1494 ["stroke"] = "darkred",
1495 ["stroke-opacity"] = ".5",
1496 ["stroke-width"] = ".5",
1497 ["fill"] = "darkgray",
1498 ["fill-opacity"] = ".75",
1499 }
1500
1501 local skipspace = p_space^0
1502 local colon = P(":")
1503 local semicolon = P(";")
1504 local eos = P(-1)
1505
1506 local someaction = (
1507 skipspace * C((1 - (skipspace * (semicolon + eos + colon)))^1)
1508 * colon
1509 * skipspace * C((1 - (skipspace * (semicolon + eos)))^0)
1510 * Carg(1) / function(k,v,a) a[k] = v end
1511 + (p_space + semicolon)^1
1512 )^1
1513
1514 local function handlechains(c)
1515 if tags[c.tg] then
1516 local at = c.at
1517 local dt = c.dt
1518 if at and dt then
1519
1520 local estyle = rawget(at,"style")
1521 if estyle and estyle ~= "" then
1522 lpegmatch(someaction,estyle,1,at)
1523 end
1524 local eclass = rawget(at,"class")
1525 if eclass and eclass ~= "" then
1526 for c in gmatch(eclass,"[^ ]+") do
1527 local s = classstyles[c]
1528 if s then
1529 for k, v in next, s do
1530 at[k] = v
1531 end
1532 end
1533 end
1534 end
1535 local tstyle = tagstyles[tag]
1536 if tstyle then
1537 for k, v in next, tstyle do
1538 at[k] = v
1539 end
1540 end
1541 if trace_path and pathtracer then
1542 for k, v in next, pathtracer do
1543 at[k] = v
1544 end
1545 end
1546 for i=1,#dt do
1547 local dti = dt[i]
1548 if type(dti) == "table" then
1549 handlechains(dti)
1550 end
1551 end
1552 end
1553 end
1554 end
1555
1556 local handlestyle do
1557
1558
1559
1560
1561
1562 local p_key = C((R("az","AZ","09","__","--")^1))
1563 local p_spec = P("{") * C((1-P("}"))^1) * P("}")
1564 local p_valid = Carg(1) * P(".") * p_key + Carg(2) * p_key
1565 local p_grab = ((p_valid * p_space^0 * p_spec / rawset) + p_space^1 + P(1))^1
1566
1567 local fontspecification = css.fontspecification
1568
1569 handlestyle = function(c)
1570 local s = xmltext(c)
1571 lpegmatch(p_grab,s,1,classstyles,tagstyles)
1572 for k, v in next, classstyles do
1573 local t = { }
1574 for k, v in gmatch(v,"%s*([^:]+):%s*([^;]+);?") do
1575 if k == "font" then
1576 local s = fontspecification(v)
1577 for k, v in next, s do
1578 t["font-"..k] = v
1579 end
1580 else
1581 t[k] = v
1582 end
1583 end
1584 classstyles[k] = t
1585 end
1586 for k, v in next, tagstyles do
1587 local t = { }
1588 for k, v in gmatch(v,"%s*([^:]+):%s*([^;]+);?") do
1589 if k == "font" then
1590 local s = fontspecification(v)
1591 for k, v in next, s do
1592 t["font-"..k] = v
1593 end
1594 else
1595 t[k] = v
1596 end
1597 end
1598 tagstyles[k] = t
1599 end
1600 end
1601
1602 function handlers.style()
1603
1604 end
1605
1606 end
1607
1608
1609
1610
1611 local function locate(id,c)
1612 if id == none then
1613 return
1614 end
1615 local res = definitions[id]
1616 local ref
1617 if res then
1618 return res
1619 end
1620 ref = gsub(id,"^url%(#(.-)%)$","%1")
1621 ref = gsub(ref,"^#","")
1622
1623 res = xmlfirst(root,"**[@id='"..ref.."']")
1624 if res then
1625 definitions[id] = res
1626 return res
1627 end
1628
1629
1630 ref = url.hashed(id)
1631 if not ref.nosheme and ref.scheme == "file" then
1632 local filename = ref.filename
1633 local fragment = ref.fragment
1634 if filename and filename ~= "" then
1635 local fullname = resolvers.findbinfile(filename)
1636 if lfs.isfile(fullname) then
1637 report("loading use file: %s",fullname)
1638 local root = xml.load(fullname)
1639 res = xmlfirst(root,"**[@id='"..fragment.."']")
1640 if res and c then
1641 xmlinheritattributes(res,c)
1642 setmetatableindex(res.at,c.at)
1643 definitions[id] = res
1644 return res
1645 end
1646 end
1647 end
1648 end
1649 return res
1650 end
1651
1652
1653
1654 local function handleclippath(at)
1655 local clippath = at["clip-path"]
1656
1657 if not clippath or clippath == "none" then
1658 return
1659 end
1660
1661 local spec = definitions[clippath] or locate(clippath)
1662
1663
1664 if not spec then
1665 local index = match(clippath,"(%d+)")
1666 if index then
1667 spec = xmlfirst(root,"clipPath["..tostring(tonumber(index) or 0).."]")
1668 end
1669 end
1670
1671
1672 if not spec then
1673 report("unknown clip %a",clippath)
1674 return
1675 elseif spec.tg ~= "clipPath" then
1676 report("bad clip %a",clippath)
1677 return
1678 end
1679
1680 ::again::
1681 for c in xmlcollected(spec,"/(path|use|g)") do
1682 local tg = c.tg
1683 if tg == "use" then
1684 local ca = c.at
1685 local id = ca["xlink:href"]
1686 if id then
1687 spec = locate(id)
1688 if spec then
1689 local sa = spec.at
1690 setmetatableindex(sa,ca)
1691 if spec.tg == "path" then
1692 local d = sa.d
1693 if d then
1694 local p = grabpath(d)
1695 p.evenodd = sa["clip-rule"] == "evenodd"
1696 p.close = true
1697
1698 return p, clippath, transform
1699 else
1700 return
1701 end
1702 else
1703 goto again
1704 end
1705 end
1706 end
1707
1708 elseif tg == "path" then
1709 local ca = c.at
1710 local d = rawget(ca,"d")
1711 if d then
1712 local p = grabpath(d)
1713 p.evenodd = ca["clip-rule"] == "evenodd"
1714 p.close = true
1715 local transform = rawget(ca,"transform")
1716 if transform then
1717 transform = handletransformstring(transform)
1718 end
1719
1720local tr = rawget(at,"transform")
1721if tr then
1722 tr = handletransformstring(tr)
1723 if tr then
1724 if transform then
1725 transform = transform .. " " .. tr
1726 else
1727 transform = tr
1728 end
1729 end
1730end
1731
1732 return p, clippath, transform
1733 else
1734 return
1735 end
1736 else
1737
1738 end
1739 end
1740 end
1741
1742
1743
1744 local s_rotation_start <const> = "draw image ( "
1745 local f_rotation_stop = formatters[") rotatedaround((0,0),-angle((%N,%N))) ;"]
1746 local f_rotation_angle = formatters[") rotatedaround((0,0),-%N) ;"]
1747
1748 local s_offset_start <const> = "draw image ( "
1749 local f_offset_stop = formatters[") shifted (%N,%N) ;"]
1750 local s_size_start <const> = "draw image ( "
1751 local f_size_stop = formatters[") xysized (%N,%N) ;"]
1752
1753 local handleoffset, handlesize do
1754
1755 handleoffset = function(at)
1756 local x = asnumber_vx(rawget(at,"x"))
1757 local y = asnumber_vy(rawget(at,"y"))
1758 if x ~= 0 or y ~= 0 then
1759 return s_offset_start, f_offset_stop(x,y)
1760 end
1761 end
1762
1763 handlesize = function(at)
1764 local width = asnumber_x(rawget(at,"width"))
1765 local height = asnumber_y(rawget(at,"height"))
1766 if width == 0 or height == 0 then
1767
1768 elseif width == 1 and height == 1 then
1769
1770 else
1771 return s_size_start, f_size_stop(width,height)
1772 end
1773 end
1774
1775 end
1776
1777 function handlers.symbol(c)
1778 local at = c.at
1779
1780 local boffset, eoffset = handleoffset(at)
1781 local bsize, esize = handlesize(at)
1782 local btransform, etransform, transform = handletransform(at)
1783
1784 if boffset then
1785 r = r + 1 result[r] = boffset
1786 end
1787 if btransform then
1788 r = r + 1 result[r] = btransform
1789 end
1790 if bsize then
1791 r = r + 1 ; result[r] = bsize
1792 end
1793
1794
1795
1796
1797
1798
1799 process(c,"/*")
1800
1801
1802
1803
1804
1805 if esize then
1806 r = r + 1 result[r] = esize
1807 end
1808 if etransform then
1809 r = r + 1 ; result[r] = etransform
1810 end
1811 if eoffset then
1812 r = r + 1 result[r] = eoffset
1813 end
1814 end
1815
1816
1817
1818 local s_shade_linear = ' withshademethod "linear" '
1819 local s_shade_circular = ' withshademethod "circular" '
1820 local f_color = formatters[' withcolor "%s"']
1821 local f_opacity = formatters[' withopacity %N']
1822 local f_pen = formatters[' withpen pencircle scaled %N']
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837 local function pattern(id)
1838 local c = definitions[id]
1839 if c and c.tg == "pattern" then
1840
1841 local _r = r
1842 local _result = result
1843 r = 0
1844 result = { }
1845
1846
1847
1848
1849
1850 local at = c.at
1851
1852 local width = asnumber_x(rawget(at,"width"))
1853 local height = asnumber_y(rawget(at,"height"))
1854 if width == 0 or height == 0 then
1855
1856 width = nil
1857 height = nil
1858 elseif width == 1 and height == 1 then
1859
1860 width = nil
1861 height = nil
1862 else
1863
1864 end
1865
1866 local boffset, eoffset = handleoffset(at)
1867
1868 local btransform, etransform, transform = handletransform(at)
1869
1870 if boffset then
1871 r = r + 1 result[r] = boffset
1872 end
1873 if btransform then
1874 r = r + 1 result[r] = btransform
1875 end
1876
1877
1878
1879
1880 local _x = at.x at.x = 0
1881 local _y = at.y at.y = 0
1882 local _w = at.width at.width = 0
1883 local _h = at.height at.height = 0
1884
1885 process(c,"/*")
1886
1887 at.x = _x
1888 at.y = _y
1889 at.width = _w
1890 at.height = _h
1891
1892
1893
1894
1895 if etransform then
1896 r = r + 1 ; result[r] = etransform
1897 end
1898 if eoffset then
1899 r = r + 1 result[r] = eoffset
1900 end
1901
1902 local okay
1903 if width and height then
1904 okay = formatters[" withpattern image ( % t )\n withpatternscale(%N,%N)"](result,width,height)
1905 else
1906 okay = formatters[" withpattern image ( % t )"](result)
1907 end
1908 r = _r
1909 result = _result
1910 return okay
1911 end
1912 end
1913
1914 local gradient do
1915
1916 local f_shade_step = formatters[' withshadestep ( withshadefraction %N withshadecolors (%s,%s) )']
1917 local f_shade_colors = formatters[' withshadecolors (%s,%s)']
1918 local f_shade_center = formatters[' withshadecenter (%N,%N)']
1919 local f_shade_center_f = formatters[' withshadecenterfraction (%N,%N)']
1920 local f_shade_radius = formatters[' withshaderadius (%N,%N) ']
1921 local f_shade_radius_f = formatters[' withshaderadiusfraction %N']
1922 local f_shade_center_one = formatters[' withshadecenterone (%N,%N)']
1923 local f_shade_center_two = formatters[' withshadecentertwo (%N,%N)']
1924 local f_shade_center_one_f = formatters[' withshadecenteronefraction (%N,%N)']
1925 local f_shade_center_two_f = formatters[' withshadecentertwofraction (%N,%N)']
1926 local f_shade_transform = formatters[' withshadetransformation identity %s']
1927
1928 local f_shade_inverse = formatters[' transformed inverse (identity %s)']
1929
1930
1931 gradient = function(id)
1932 local spec = definitions[id]
1933 if spec then
1934 local kind = spec.tg
1935 local shade = { }
1936 local opacs = nil
1937 local ns = 0
1938 local no = 0
1939 local a = spec.at
1940
1941 local hid = rawget(a,"href") or rawget(a,"xlink:href")
1942 local res = locate(hid)
1943
1944 local gu = rawget(a, "gradientUnits")
1945 local gt = rawget(a, "gradientTransform")
1946 local sm = rawget(a, "spreadMethod")
1947
1948 local userspace = gu == "userSpaceOnUse"
1949
1950 if kind == "linearGradient" then
1951 ns = ns + 1 ; shade[ns] = s_shade_linear
1952
1953 local x1 = rawget(a,"x1")
1954 local y1 = rawget(a,"y1")
1955 local x2 = rawget(a,"x2")
1956 local y2 = rawget(a,"y2")
1957 if userspace then
1958 if x1 and y1 then
1959 ns = ns + 1 ; shade[ns] = f_shade_center_one(asnumber_p(x1),asnumber_p(y1))
1960 end
1961 if x2 and y2 then
1962 ns = ns + 1 ; shade[ns] = f_shade_center_two(asnumber_p(x2),asnumber_p(y2))
1963 end
1964 else
1965 if x1 and y1 then
1966 ns = ns + 1 ; shade[ns] = f_shade_center_one_f(asnumber_p(x1),1-asnumber_p(y1))
1967 end
1968 if x2 and y2 then
1969 ns = ns + 1 ; shade[ns] = f_shade_center_two_f(asnumber_p(x2),1-asnumber_p(y2))
1970 end
1971 end
1972
1973 elseif kind == "radialGradient" then
1974 ns = ns + 1 ; shade[ns] = s_shade_circular
1975
1976 local cx = rawget(a,"cx")
1977 local cy = rawget(a,"cy")
1978 local r = rawget(a,"r" )
1979 local fx = rawget(a,"fx")
1980 local fy = rawget(a,"fy")
1981
1982 if userspace then
1983 if cx and cy then
1984 ns = ns + 1 ; shade[ns] = f_shade_center(asnumber_p(cx),asnumber_p(cy))
1985 end
1986 if fx and fy then
1987 ns = ns + 1 ; shade[ns] = f_shade_center_one(asnumber_p(fx),-asnumber_p(fy))
1988 end
1989 if r then
1990 ns = ns + 1 ; shade[ns] = f_shade_radius(asnumber_p(r))
1991 end
1992 if fx and fy then
1993
1994 end
1995 else
1996 if cx and cy then
1997 ns = ns + 1 ; shade[ns] = f_shade_center_f(asnumber_p(cx),1-asnumber_p(cy))
1998 end
1999 if fx and fy then
2000 ns = ns + 1 ; shade[ns] = f_shade_center_one_f(asnumber_p(fx),1-asnumber_p(fy))
2001 end
2002 if r then
2003 ns = ns + 1 ; shade[ns] = f_shade_radius_f(asnumber_p(r))
2004 end
2005 if fx and fy then
2006
2007 end
2008 end
2009 else
2010 return
2011 end
2012
2013 local function crap(spec)
2014 local colora, colorb
2015 local opacitya, opacityb
2016 local lastns = ns
2017 for c in xmlcollected(spec,"/stop") do
2018 local a = c.at
2019 local offset = rawget(a,"offset")
2020 local colorb = rawget(a,"stop-color")
2021 if not colora then
2022 colora = colorb
2023 end
2024
2025
2026 local fraction = offset and asnumber_p(offset)
2027 if not fraction then
2028
2029 fraction = xmlcount(spec,"/stop")/100
2030 end
2031 if colora and colorb and colora ~= "" and colorb ~= "" then
2032 ns = ns + 1
2033 if userspace then
2034 shade[ns] = f_shade_step(fraction,thecolor(colora),thecolor(colorb))
2035 else
2036 shade[ns] = f_shade_step(fraction,thecolor(colora),thecolor(colorb))
2037 end
2038 end
2039 colora = colorb
2040 end
2041 for c in xmlcollected(spec,"/stop[@stop-opacity]") do
2042 opacityb = c.at["stop-opacity"]
2043 if not opacitya then
2044 opacitya = opacityb
2045 end
2046 end
2047 if opacitya then
2048 opacs = { }
2049 for i=1,lastns do
2050 no = no + 1 ; opacs[no] = shade[i]
2051 end
2052 no = no + 1 ; opacs[no] = f_shade_colors(opacitya,opacityb)
2053 end
2054 return colora
2055 end
2056
2057 if not crap(spec) then
2058
2059
2060
2061 if res then
2062 crap(res)
2063 end
2064 end
2065 local transform
2066 if gt then
2067 ns = ns + 1
2068 transform = handletransformstring(gt)
2069 shade[ns] = f_shade_transform(transform)
2070 transform = f_shade_inverse(transform)
2071 if opacitya then
2072 no = no + 1
2073 opacs[no] = shade[no]
2074 end
2075 end
2076 shade = concat(shade,"\n ")
2077 opacs = no > 0 and concat(opacs,"\n ")
2078 return shade, opacs, transform
2079 end
2080 end
2081 end
2082
2083 local function drawproperties(stroke,at,opacity)
2084 local p = at["stroke-width"]
2085 if p then
2086 p = f_pen(asnumber_r(p))
2087 end
2088 local d = at["stroke-dasharray"]
2089 if d == "none" then
2090 d = nil
2091 elseif d then
2092 local o = at["stroke-dashoffset"]
2093 if o and o ~= "none" then
2094 o = asnumber_r(o)
2095 else
2096 o = false
2097 end
2098 d = dashed(d,o)
2099 end
2100 local c = withcolor(stroke)
2101 local o = at["stroke-opacity"] or (opacity and at["opacity"])
2102 if o == "none" then
2103 o = nil
2104 elseif o == "transparent" then
2105 o = f_opacity(0)
2106 elseif o then
2107 o = asnumber_r(o)
2108 if o == ignoredopacity then
2109 o = nil
2110 elseif o then
2111 o = f_opacity(o)
2112 else
2113 o = nil
2114 end
2115 end
2116 return p, d, c, o
2117 end
2118
2119 local s_opacity_start <const> = "draw image ("
2120 local f_opacity_content = formatters["setgroup currentpicture to boundingbox currentpicture withopacity %N;"]
2121 local s_opacity_stop <const> = ") ;"
2122
2123 local function sharedopacity(at)
2124 local o = at["opacity"]
2125 if o and o ~= "none" then
2126 o = asnumber_r(o)
2127 if o == ignoredopacity then
2128 return
2129 end
2130 if o then
2131 return s_opacity_start, f_opacity_content(o), s_opacity_stop
2132 end
2133 end
2134 end
2135
2136
2137
2138 local function fillproperties(fill,at,opacity)
2139
2140 local o = at["fill-opacity"] or (opacity and rawget(at,"opacity"))
2141
2142 local o = at["fill-opacity"]
2143 if tonumber(o) == 1 then
2144
2145 o = rawget(at,"opacity") or o
2146 end
2147
2148 local c = nil
2149 local t = nil
2150 local ops = nil
2151 if c ~= "none" then
2152 c, ops, t = gradient(fill)
2153 if ops then
2154 return c, ops, t
2155 end
2156 if not c then
2157 c = pattern(fill)
2158 if c then
2159 if o and o ~= "none" then
2160 o = asnumber_r(o)
2161 if o ~= ignoredopacity then
2162 return c, ops, t, f_opacity(o), "pattern"
2163 end
2164 end
2165 return c, ops, t, false, "pattern"
2166 else
2167 c = withcolor(fill)
2168 end
2169 end
2170 end
2171 if not o and fill == "transparent" then
2172 return nil, nil, nil, f_opacity(0), true
2173 elseif o and o ~= "none" then
2174 o = asnumber_r(o)
2175 if o == ignoredopacity then
2176 return c, nil, t
2177 end
2178 if o then
2179 return c, nil, t, f_opacity(o), (o == 1 and "invisible")
2180 end
2181 end
2182 return c, ops, t
2183 end
2184
2185 local viewport do
2186
2187 local s_viewport_start <const> = "draw image ("
2188 local s_viewport_stop <const> = ") ;"
2189 local f_viewport_shift = formatters["currentpicture := currentpicture shifted (%N,%N);"]
2190 local f_viewport_scale = formatters["currentpicture := currentpicture xysized (%N,%N);"]
2191 local f_viewport_clip = formatters["clip currentpicture to (unitsquare xyscaled (%N,%N));"]
2192
2193 viewport = function(x,y,w,h,noclip,scale)
2194 r = r + 1 ; result[r] = s_viewport_start
2195 return function()
2196 local okay = w ~= 0 and h ~= 0
2197 if okay and scale then
2198 r = r + 1 ; result[r] = f_viewport_scale(w,h)
2199 end
2200 if x ~= 0 or y ~= 0 then
2201 r = r + 1 ; result[r] = f_viewport_shift(-x,y)
2202 end
2203 if okay and not noclip then
2204 r = r + 1 ; result[r] = f_viewport_clip(w,-h)
2205 end
2206
2207 r = r + 1 ; result[r] = s_viewport_stop
2208 end
2209 end
2210
2211 end
2212
2213
2214
2215
2216 function handledefinitions(c)
2217 for c in xmlcollected(c,"defs/*") do
2218 local a = c.at
2219 if a then
2220 local id = rawget(a,"id")
2221 if id then
2222 definitions["#" .. id ] = c
2223 definitions["url(#" .. id .. ")"] = c
2224 end
2225 end
2226 end
2227 for c in xmlcollected(c,"(symbol|radialGradient|linearGradient)") do
2228 local id = rawget(c.at,"id")
2229 if id then
2230 definitions["#" .. id ] = c
2231 definitions["url(#" .. id .. ")"] = c
2232 end
2233 end
2234 end
2235
2236
2237
2238
2239
2240
2241
2242
2243
2244
2245
2246
2247
2248
2249
2250
2251 local uselevel = 0
2252
2253 function handlers.use(c)
2254 local at = c.at
2255 local id = rawget(at,"href") or rawget(at,"xlink:href")
2256 local res = locate(id,c)
2257 if res then
2258 uselevel = uselevel + 1
2259 local boffset, eoffset = handleoffset(at)
2260 local btransform, etransform, transform = handletransform(at)
2261
2262 if boffset then
2263 r = r + 1 result[r] = boffset
2264 end
2265
2266
2267
2268 if btransform then
2269 r = r + 1 result[r] = btransform
2270 end
2271
2272 local _transform = transform
2273 local _clippath = clippath
2274 at["transform"] = false
2275
2276
2277 setmetatableindex(res.at,at)
2278
2279 local tg = res.tg
2280
2281 process(res,".")
2282
2283
2284
2285
2286 at["transform"] = _transform
2287
2288
2289 if etransform then
2290 r = r + 1 ; result[r] = etransform
2291 end
2292
2293 if eoffset then
2294 r = r + 1 result[r] = eoffset
2295 end
2296
2297 uselevel = uselevel - 1
2298 else
2299 report("use: unknown definition %a",id)
2300 end
2301 end
2302
2303 local f_do_draw = formatters[' draw (%s)']
2304 local f_do_fill = formatters[' fill (%s)']
2305 local f_eo_fill = formatters[' eofill (%s)']
2306 local s_clip_start <const> = 'save p ; picture p ; p := image ('
2307 local f_clip_stop_c = formatters[') ; clip p to (%s &&& cycle) %s ; draw p ;']
2308 local f_clip_stop_l = formatters[') ; clip p to (%s &&& cycle) %s ; draw p ;']
2309 local f_clip_stop = f_clip_stop_c
2310 local f_eoclip_stop_c = formatters[') ; eoclip p to (%s &&& cycle) %s ; draw p ;']
2311 local f_eoclip_stop_l = formatters[') ; eoclip p to (%s &&& cycle) %s ; draw p ;']
2312 local f_eoclip_stop = f_eoclip_stop_c
2313
2314 local f_shade_luminosity = formatters['draw luminosityshade (\n (%s &&& cycle) %s\n ) (\n%s\n ) (\n%s\n) ;']
2315
2316
2317
2318 local function flushobject(object,at,c,o)
2319 local btransform, etransform = handletransform(at)
2320 local cpath, _, ctransform = handleclippath(at)
2321
2322 if cpath then
2323 r = r + 1 ; result[r] = s_clip_start
2324 end
2325
2326 if btransform then
2327 r = r + 1 ; result[r] = btransform
2328 end
2329
2330 r = r + 1 ; result[r] = f_do_draw(object)
2331
2332 if c then
2333 r = r + 1 ; result[r] = c
2334 end
2335
2336 if o then
2337 r = r + 1 ; result[r] = o
2338 end
2339
2340 if etransform then
2341 r = r + 1 ; result[r] = etransform
2342 end
2343
2344 r = r + 1 ; result[r] = " ;"
2345
2346 if cpath then
2347 local f_done = cpath.evenodd
2348 if cpath.curve then
2349 f_done = f_done and f_eoclip_stop_c or f_clip_stop_c
2350 else
2351 f_done = f_done and f_eoclip_stop_l or f_clip_stop_l
2352 end
2353 r = r + 1 ; result[r] = f_done(cpath.path,ctransform or "")
2354 end
2355
2356 if etransform then
2357 r = r + 1 ; result[r] = etransform
2358 end
2359 end
2360
2361 do
2362
2363 local flush
2364
2365 local f_withlinecap = formatters[" withlinecap %s"]
2366 local f_withlinejoin = formatters[" withlinejoin %s"]
2367 local f_withmiterlimit = formatters[" withmiterlimit %s;"]
2368
2369 local linecaps = { butt = "butt", square = "squared", round = "rounded" }
2370 local linejoins = { miter = "mitered", bevel = "beveled", round = "rounded" }
2371
2372 local function lineproperties(at)
2373 local cap = at["stroke-linecap"]
2374 local join = at["stroke-linejoin"]
2375 local limit = at["stroke-miterlimit"]
2376 if cap then
2377 cap = linecaps[cap]
2378 end
2379 if join then
2380 join = linejoins[join]
2381 end
2382 if limit then
2383 limit = asnumber_r(limit)
2384 end
2385 return cap, join, limit
2386 end
2387
2388
2389
2390 function handlers.marker()
2391
2392 end
2393
2394
2395
2396
2397
2398 local function makemarker(where,c,x1,y1,x2,y2,x3,y3,parentat)
2399 local at = c.at
2400 local refx = rawget(at,"refX")
2401 local refy = rawget(at,"refY")
2402 local width = rawget(at,"markerWidth")
2403 local height = rawget(at,"markerHeight")
2404 local units = rawget(at,"markerUnits")
2405 local view = rawget(at,"viewBox")
2406 local orient = rawget(at,"orient")
2407
2408 local units = units and asnumber(units) or 1
2409
2410 local angx = 0
2411 local angy = 0
2412 local angle = 0
2413
2414 if where == "beg" then
2415 if orient == "auto" then
2416
2417 angx = abs(x2 - x3)
2418 angy = abs(y2 - y3)
2419 elseif orient == "auto-start-reverse" then
2420
2421 angx = -abs(x2 - x3)
2422 angy = -abs(y2 - y3)
2423 elseif orient then
2424 angle = asnumber_r(orient)
2425 end
2426 elseif where == "end" then
2427
2428 if orient == "auto" or orient == "auto-start-reverse" then
2429 angx = abs(x1 - x2)
2430 angy = abs(y1 - y2)
2431 elseif orient then
2432 angle = asnumber_r(orient)
2433 end
2434 elseif orient then
2435 angle = asnumber_r(orient)
2436 end
2437
2438
2439 refx = asnumber_x(refx)
2440 refy = asnumber_y(refy)
2441
2442 width = (width and asnumber_x(width) or 3) * units
2443 height = (height and asnumber_y(height) or 3) * units
2444
2445 local x = 0
2446 local y = 0
2447 local w = width
2448 local h = height
2449
2450
2451
2452 r = r + 1 ; result[r] = s_offset_start
2453
2454 local wrapupviewport
2455
2456
2457
2458 local xpct, ypct, rpct
2459 if view then
2460 x, y, w, h = handleviewbox(view)
2461 end
2462
2463 if width ~= 0 then
2464 w = width
2465 end
2466 if height ~= 0 then
2467 h = height
2468 end
2469
2470 if h then
2471 xpct = percentage_x
2472 ypct = percentage_y
2473 rpct = percentage_r
2474 percentage_x = w / 100
2475 percentage_y = h / 100
2476 percentage_r = (sqrt(w^2 + h^2) / sqrt(2)) / 100
2477 wrapupviewport = viewport(x,y,w,h,true,true)
2478 end
2479
2480
2481
2482 local hasref = refx ~= 0 or refy ~= 0
2483 local hasrot = angx ~= 0 or angy ~= 0 or angle ~= 0
2484
2485 local btransform, etransform, transform = handletransform(at)
2486
2487 if btransform then
2488 r = r + 1 ; result[r] = btransform
2489 end
2490
2491 if hasrot then
2492 r = r + 1 ; result[r] = s_rotation_start
2493 end
2494
2495 if hasref then
2496 r = r + 1 ; result[r] = s_offset_start
2497 end
2498
2499 local _transform = transform
2500 at["transform"] = false
2501
2502 handlers.g(c)
2503
2504 at["transform"] = _transform
2505
2506 if hasref then
2507 r = r + 1 ; result[r] = f_offset_stop(-refx,refy)
2508 end
2509
2510 if hasrot then
2511 if angle ~= 0 then
2512 r = r + 1 ; result[r] = f_rotation_angle(angle)
2513 else
2514 r = r + 1 ; result[r] = f_rotation_stop(angx,angy)
2515 end
2516 end
2517
2518 if etransform then
2519 r = r + 1 ; result[r] = etransform
2520 end
2521
2522 if h then
2523 percentage_x = xpct
2524 percentage_y = ypct
2525 percentage_r = rpct
2526 if wrapupviewport then
2527 wrapupviewport()
2528 end
2529 end
2530 r = r + 1 ; result[r] = f_offset_stop(x2,y2)
2531
2532 end
2533
2534
2535
2536 local function addmarkers(list,begmarker,midmarker,endmarker,at)
2537 local n = #list
2538 if n > 3 then
2539 if begmarker then
2540 local m = locate(begmarker)
2541 if m then
2542 makemarker("beg",m,false,false,list[1],list[2],list[3],list[4],at)
2543 end
2544 end
2545 if midmarker then
2546 local m = locate(midmarker)
2547 if m then
2548 for i=3,n-2,2 do
2549 makemarker("mid",m,list[i-2],list[i-1],list[i],list[i+1],list[i+2],list[i+3],at)
2550 end
2551 end
2552 end
2553 if endmarker then
2554 local m = locate(endmarker)
2555 if m then
2556 makemarker("end",m,list[n-3],list[n-2],list[n-1],list[n],false,false,at)
2557 end
2558 end
2559 else
2560
2561 end
2562 end
2563
2564 local function flush(shape,dofill,closed,at,list,begmarker,midmarker,endmarker)
2565 local fill = dofill and (at["fill"] or "black")
2566 local stroke = at["stroke"] or "none"
2567
2568 local btransform, etransform = handletransform(at)
2569 local cpath, _, ctransform = handleclippath(at)
2570
2571 if cpath then
2572 r = r + 1 ; result[r] = s_clip_start
2573 end
2574
2575 local has_stroke = stroke and stroke ~= "none"
2576 local has_fill = fill and fill ~= "none"
2577
2578 local bopacity, copacity, eopacity
2579 if has_stroke and has_fill then
2580 bopacity, copacity, eopacity = sharedopacity(at)
2581 end
2582 if copacity then
2583 r = r + 1 ; result[r] = bopacity
2584 end
2585 if has_fill and not closed then
2586 shape = shape .. "&&cycle"
2587 end
2588 if has_fill then
2589 local color, opacs, transform, opacity, option = fillproperties(fill,at,not has_stroke)
2590 local f_xx_fill = at["fill-rule"] == "evenodd" and f_eo_fill or f_do_fill
2591 if option ~= pattern and opacs then
2592
2593
2594 r = r + 1 ; result[r] = f_shade_luminosity(shape,transform or "",opacs,color)
2595 else
2596 if btransform then
2597 r = r + 1 ; result[r] = btransform
2598 end
2599 if option == "pattern" then
2600 r = r + 1 ; result[r] = f_d_draw(shape)
2601 else
2602 r = r + 1 ; result[r] = f_xx_fill(shape)
2603 if transform then
2604 r = r + 1 result[r] = transform
2605 end
2606 end
2607 if color then
2608 r = r + 1 ; result[r] = color
2609 end
2610 if opacity then
2611 r = r + 1 ; result[r] = opacity
2612 end
2613 r = r + 1 ; result[r] = etransform or " ;"
2614 end
2615 end
2616
2617 if has_stroke then
2618 local pen, dashing, color, opacity = drawproperties(stroke,at,not has_fill)
2619 local cap, join, limit = lineproperties(at)
2620 if btransform then
2621 r = r + 1 ; result[r] = btransform
2622 end
2623 r = r + 1 ; result[r] = f_do_draw(shape)
2624 if pen then r = r + 1 ; result[r] = pen end
2625 if dashing then r = r + 1 ; result[r] = dashing end
2626 if color then r = r + 1 ; result[r] = color end
2627 if opacity then r = r + 1 ; result[r] = opacity end
2628 if cap then r = r + 1 ; result[r] = f_withlinecap (cap) end
2629 if join then r = r + 1 ; result[r] = f_withlinejoin (join) end
2630 if limit then r = r + 1 ; result[r] = f_withmiterlimit(limit) end
2631 r = r + 1 ; result[r] = etransform or " ;"
2632
2633 if list then
2634 addmarkers(list,begmarker,midmarker,endmarker,at)
2635 end
2636 end
2637 if copacity then
2638 r = r + 1 ; result[r] = copacity
2639 r = r + 1 ; result[r] = eopacity
2640 end
2641
2642 if cpath then
2643 r = r + 1 ; result[r] = (cpath.evenodd and f_eoclip_stop or f_clip_stop)(cpath.path,ctransform)
2644 end
2645 end
2646
2647 local f_rectangle = formatters['unitsquare xyscaled (%N,%N) shifted (%N,%N)']
2648 local f_rounded = formatters['roundedsquarexy(%N,%N,%N,%N) shifted (%N,%N)']
2649 local f_line = formatters['((%N,%N)--(%N,%N))']
2650 local f_ellipse = formatters['(fullcircle xyscaled (%N,%N) shifted (%N,%N))']
2651 local f_circle = formatters['(fullcircle scaled %N shifted (%N,%N))']
2652
2653 function handlers.line(c)
2654 local at = c.at
2655 local x1 = rawget(at,"x1")
2656 local y1 = rawget(at,"y1")
2657 local x2 = rawget(at,"x2")
2658 local y2 = rawget(at,"y2")
2659
2660 x1 = x1 and asnumber_vx(x1) or 0
2661 y1 = y1 and asnumber_vy(y1) or 0
2662 x2 = x2 and asnumber_vx(x2) or 0
2663 y2 = y2 and asnumber_vy(y2) or 0
2664
2665 flush(f_line(x1,y1,x2,y2),false,false,at)
2666 end
2667
2668 function handlers.rect(c)
2669 local at = c.at
2670 local width = rawget(at,"width")
2671 local height = rawget(at,"height")
2672 local x = rawget(at,"x")
2673 local y = rawget(at,"y")
2674 local rx = rawget(at,"rx")
2675 local ry = rawget(at,"ry")
2676
2677 width = width and asnumber_x(width) or 0
2678 height = height and asnumber_y(height) or 0
2679 x = x and asnumber_vx(x) or 0
2680 y = y and asnumber_vy(y) or 0
2681
2682 y = y - height
2683
2684 if rx then rx = asnumber_x(rx) end
2685 if ry then ry = asnumber_y(ry) end
2686
2687 if rx or ry then
2688 if not rx then rx = ry end
2689 if not ry then ry = rx end
2690 flush(f_rounded(width,height,rx,ry,x,y),true,true,at)
2691 else
2692 flush(f_rectangle(width,height,x,y),true,true,at)
2693 end
2694 end
2695
2696 function handlers.ellipse(c)
2697 local at = c.at
2698 local cx = rawget(at,"cx")
2699 local cy = rawget(at,"cy")
2700 local rx = rawget(at,"rx")
2701 local ry = rawget(at,"ry")
2702
2703 cx = cx and asnumber_vx(cx) or 0
2704 cy = cy and asnumber_vy(cy) or 0
2705 rx = rx and asnumber_r (rx) or 0
2706 ry = ry and asnumber_r (ry) or 0
2707
2708 flush(f_ellipse(2*rx,2*ry,cx,cy),true,true,at)
2709 end
2710
2711 function handlers.circle(c)
2712 local at = c.at
2713 local cx = rawget(at,"cx")
2714 local cy = rawget(at,"cy")
2715 local r = rawget(at,"r")
2716
2717 cx = cx and asnumber_vx(cx) or 0
2718 cy = cy and asnumber_vy(cy) or 0
2719 r = r and asnumber_r (r) or 0
2720
2721 flush(f_circle(2*r,cx,cy),true,true,at)
2722 end
2723
2724 local f_lineto_z = formatters['(%N,%N)']
2725 local f_lineto_n = formatters['--(%N,%N)']
2726
2727 local p_pair = p_optseparator * p_number_vx * p_optseparator * p_number_vy
2728 local p_open = Cc("(")
2729 local p_close = Carg(1) * P(true) / function(s) return s end
2730 local p_polyline = Cs(p_open * (p_pair / f_lineto_z) * (p_pair / f_lineto_n)^0 * p_close)
2731 local p_polypair = Ct(p_pair^0)
2732
2733 local function poly(c,final)
2734 local at = c.at
2735 local points = rawget(at,"points")
2736 if points then
2737 local path = lpegmatch(p_polyline,points,1,final)
2738 local list = nil
2739 local begmarker = rawget(at,"marker-start")
2740 local midmarker = rawget(at,"marker-mid")
2741 local endmarker = rawget(at,"marker-end")
2742 if begmarker or midmarker or endmarker then
2743 list = lpegmatch(p_polypair,points)
2744 end
2745
2746 flush(path,true,false,at,list,begmarker,midmarker,endmarker)
2747 end
2748 end
2749
2750 function handlers.polyline(c) poly(c, ")") end
2751 function handlers.polygon (c) poly(c,"--cycle)") end
2752
2753 function handlers.path(c)
2754 local at = c.at
2755 local d = rawget(at,"d")
2756 if d then
2757 local shape, l = grabpath(d)
2758 local path = shape.path
2759 if not path or #path == "" then
2760 return
2761 end
2762 local fill = at["fill"] or "black"
2763 local stroke = at["stroke"] or "none"
2764 local btransform, etransform = handletransform(at)
2765 local cpath, _, ctransform = handleclippath(at)
2766 if cpath then
2767 r = r + 1 ; result[r] = s_clip_start
2768 end
2769
2770
2771
2772 if fill and fill ~= "none" then
2773 local color, opacs, transform, opacity, option = fillproperties(fill,at)
2774 local evenodd = at["fill-rule"] == "evenodd"
2775 if not shape.closed then
2776 path = path .. "&&cycle"
2777 end
2778 if opacs then
2779
2780
2781 r = r + 1 ; result[r] = f_shade_luminosity(path,transform or "",opacs,color)
2782 else
2783 if btransform then
2784 r = r + 1 ; result[r] = btransform
2785 end
2786 if option == "pattern" then
2787 r = r + 1 result[r] = f_do_draw(path)
2788 elseif evenodd then
2789 r = r + 1 result[r] = f_eo_fill(path)
2790 else
2791 r = r + 1 result[r] = f_do_fill(path)
2792 end
2793 if color then
2794 r = r + 1 ; result[r] = color
2795 end
2796 if opacity then
2797 r = r + 1 ; result[r] = opacity
2798 end
2799 r = r + 1 ; result[r] = etransform or " ;"
2800 end
2801 end
2802
2803 if stroke and stroke ~= "none" then
2804 local begmarker = rawget(at,"marker-start")
2805 local midmarker = rawget(at,"marker-mid")
2806 local endmarker = rawget(at,"marker-end")
2807 if begmarker or midmarker or endmarker then
2808 list = grablist(l)
2809 end
2810 local pen, dashing, color, opacity = drawproperties(stroke,at)
2811 local cap, join, limits = lineproperties(at)
2812 if btransform then
2813 r = r + 1 ; result[r] = btransform
2814 end
2815 r = r + 1 result[r] = f_do_draw(path)
2816 if pen then r = r + 1 ; result[r] = pen end
2817 if dashing then r = r + 1 ; result[r] = dashing end
2818 if color then r = r + 1 ; result[r] = color end
2819 if opacity then r = r + 1 ; result[r] = opacity end
2820 if cap then r = r + 1 ; result[r] = f_withlinecap (cap) end
2821 if join then r = r + 1 ; result[r] = f_withlinejoin (join) end
2822 if limit then r = r + 1 ; result[r] = f_withmiterlimit(limit) end
2823 r = r + 1 result[r] = etransform or " ;"
2824 if list then
2825 addmarkers(list,begmarker,midmarker,endmarker,at)
2826 end
2827 end
2828
2829 if cpath then
2830 r = r + 1 ; result[r] = f_clip_stop(cpath.path,ctransform)
2831 end
2832 end
2833 end
2834
2835 end
2836
2837
2838
2839 do
2840
2841
2842
2843
2844
2845
2846
2847
2848
2849 local f_image = formatters[ [[svgembeddedfigure(%i) xysized (%N,%N) shifted (%N,%N)]] ]
2850
2851
2852
2853 function handlers.image(c)
2854 local at = c.at
2855 local im = rawget(at,"xlink:href")
2856 if im then
2857 local kind, data = match(im,"^data:image/([a-z]+);base64,(.*)$")
2858 if kind == "png" then
2859
2860 elseif kind == "jpeg" then
2861 kind = "jpg"
2862 else
2863 kind = false
2864 end
2865 if kind and data then
2866 local w = rawget(at,"width")
2867 local h = rawget(at,"height")
2868 local x = rawget(at,"x")
2869 local y = rawget(at,"y")
2870 w = w and asnumber_x(w)
2871 h = h and asnumber_y(h)
2872 x = x and asnumber_vx(x) or 0
2873 y = y and asnumber_vy(y) or 0
2874 local data = basexx.decode64(data)
2875
2876 local index = images.storedata("svg", {
2877 kind = kind,
2878 data = data,
2879 info = graphics.identifiers[kind](data,"string"),
2880 })
2881
2882 if not w or not h then
2883 if info then
2884
2885 local xsize = info.xsize
2886 local ysize = info.ysize
2887 if not w then
2888 if not h then
2889 w = xsize
2890 h = ysize
2891 else
2892 w = (h / ysize) * xsize
2893 end
2894 else
2895 h = (w / xsize) * ysize
2896 end
2897 end
2898 end
2899
2900 if not w then w = h or 1 end
2901 if not h then h = w or 1 end
2902
2903
2904 flushobject(f_image(index,w,h,x,y - h),at)
2905 else
2906
2907 end
2908 end
2909 end
2910
2911 end
2912
2913
2914
2915 do
2916
2917 function handlers.a(c)
2918 process(c,"/*")
2919 end
2920
2921 function handlers.g(c)
2922 local at = c.at
2923
2924 local btransform, etransform, transform = handletransform(at)
2925 local cpath, clippath, ctransform = handleclippath(at)
2926 local bopacity, copacity, eopacity = sharedopacity(at)
2927 if copacity then
2928 r = r + 1 ; result[r] = bopacity
2929 end
2930
2931 if cpath then
2932 r = r + 1 ; result[r] = s_clip_start
2933 end
2934
2935 if btransform then
2936 r = r + 1 result[r] = btransform
2937 end
2938 local _transform = transform
2939 local _clippath = clippath
2940 at["transform"] = false
2941 at["clip-path"] = false
2942
2943 process(c,"/!(defs|symbol)")
2944
2945 at["transform"] = _transform
2946 at["clip-path"] = _clippath
2947
2948 if etransform then
2949 r = r + 1 ; result[r] = etransform
2950 end
2951 if cpath then
2952 local f_done = cpath.evenodd
2953 if cpath.curve then
2954 f_done = f_done and f_eoclip_stop_c or f_clip_stop_c
2955 else
2956 f_done = f_done and f_eoclip_stop_l or f_clip_stop_l
2957 end
2958 r = r + 1 ; result[r] = f_done(cpath.path,ctransform or "")
2959 end
2960 if copacity then
2961 r = r + 1 ; result[r] = copacity
2962 r = r + 1 ; result[r] = eopacity
2963 end
2964 end
2965
2966
2967
2968
2969
2970
2971
2972
2973
2974
2975
2976
2977
2978
2979
2980
2981 do
2982
2983 local s_start <const> = "\\svgstart "
2984 local s_stop <const> = "\\svgstop "
2985 local f_set = formatters["\\svgset{%N}{%N}"]
2986 local f_color_c = formatters["\\svgcolorc{%.3N}{%.3N}{%.3N}{"]
2987 local f_color_o = formatters["\\svgcoloro{%.3N}{"]
2988 local f_color_b = formatters["\\svgcolorb{%.3N}{%.3N}{%.3N}{%.3N}{"]
2989 local f_poscode = formatters["\\svgpcode{%N}{%N}{%s}"]
2990 local f_poschar = formatters["\\svgpchar{%N}{%N}{%s}"]
2991 local f_posspace = formatters["\\svgpspace{%N}{%N}"]
2992 local f_code = formatters["\\svgcode{%s}"]
2993 local f_char = formatters["\\svgchar{%s}"]
2994 local s_space <const> = "\\svgspace "
2995 local f_size = formatters["\\svgsize{%0.6f}"]
2996 local f_font = formatters["\\svgfont{%s}{%s}{%s}"]
2997 local f_hashed = formatters["\\svghashed{%s}"]
2998
2999
3000
3001 local anchors = {
3002 ["start"] = "drt",
3003 ["end"] = "dlft",
3004 ["middle"] = "d",
3005 }
3006
3007
3008
3009 local f_text_normal_svg = formatters['(onetimetextext.%s("%s") shifted (%N,%N))']
3010 local f_text_simple_svg = formatters['onetimetextext.%s("%s")']
3011 local f_mapped_normal_svg = formatters['(svgtext("%s") shifted (%N,%N))']
3012 local f_mapped_simple_svg = formatters['svgtext("%s")']
3013
3014 local cssfamily = css.family
3015 local cssstyle = css.style
3016 local cssweight = css.weight
3017 local csssize = css.size
3018
3019 local usedfonts = setmetatableindex(function(t,k)
3020 local v = setmetatableindex("table")
3021 t[k] = v
3022 return v
3023 end)
3024
3025
3026
3027 local function checkedfamily(name)
3028 if find(name,"^.-verdana.-$") then
3029 name = "verdana"
3030 end
3031 return name
3032 end
3033
3034
3035
3036
3037
3038
3039
3040
3041
3042
3043
3044
3045
3046
3047
3048
3049
3050 local defaultsize = 10
3051
3052 local sensitive = {
3053 ["#"] = true,
3054 ["$"] = true,
3055 ["%"] = true,
3056 ["&"] = true,
3057 ["\\"] = true,
3058 ["{"] = true,
3059 ["|"] = true,
3060 ["}"] = true,
3061 ["~"] = true,
3062 }
3063
3064
3065
3066 local function validdelta(usedscale,d)
3067 if d then
3068 local value, unit = match(d,"^([%A]-)(%a+)")
3069 value = tonumber(value) or 0
3070 if not unit then
3071 return value .. "bp"
3072 elseif unit == "ex" or unit == "em" then
3073 return (usedscale * value) .. unit
3074 else
3075 return value .. "bp"
3076 end
3077 else
3078 return "0bp"
3079 end
3080 end
3081
3082 local cleanfontname = fonts.names.cleanname
3083
3084 local x_family = false
3085 local x_weight = false
3086 local x_style = false
3087
3088 local function collect(parent,t,c,x,y,size,scale,family,tx,ty,tdx,tdy)
3089 if c.special then
3090 return nil
3091 end
3092 local dt = c.dt
3093 local nt = #dt
3094 local at = c.at
3095 local tg = c.tg
3096 local ax = rawget(at,"x")
3097 local ay = rawget(at,"y")
3098 local v_opacity = tonumber(at["fill-opacity"])
3099 local v_fill = at["fill"]
3100 local v_family = at["font-family"]
3101 local v_style = at["font-style"]
3102 local v_weight = at["font-weight"]
3103 local v_size = at["font-size"]
3104 local v_lineheight = at["line-height"]
3105
3106 ax = ax and asnumber_vx(ax) or x
3107 ay = ay and asnumber_vy(ay) or y
3108
3109 if v_family then v_family = cssfamily(v_family) end
3110 if v_style then v_style = cssstyle (v_style) end
3111 if v_weight then v_weight = cssweight(v_weight) end
3112 if v_size then v_size = csssize (v_size,factors,size/100) or tonumber(v_size) end
3113
3114 if not v_family then v_family = family end
3115 if not v_weight then v_weight = "normal" end
3116 if not v_style then v_style = "normal" end
3117
3118 if v_family then
3119 v_family = cleanfontname(v_family)
3120 v_family = checkedfamily(v_family)
3121 end
3122
3123 usedfonts[v_family][v_weight][v_style] = true
3124
3125 local lh = v_lineheight and asnumber_vx(v_lineheight) or false
3126
3127 ax = ax - x
3128 ay = ay - y
3129
3130 local usedsize = v_size or defaultsize
3131 local usedscale = usedsize / defaultsize
3132
3133
3134
3135
3136
3137
3138
3139
3140
3141
3142 local newfont = v_family ~= x_family or v_weight ~= x_weight or v_style ~= x_style
3143 if newfont then
3144 x_family = v_family
3145 x_weight = v_weight
3146 x_style = v_style
3147 t[#t+1] = f_font(v_family,v_weight,v_style)
3148 t[#t+1] = "{"
3149 end
3150 t[#t+1] = f_size(usedscale)
3151 t[#t+1] = "{"
3152
3153 if trace_fonts then
3154
3155 report("element : %s",c.tg)
3156 report(" font family : %s",v_family)
3157 report(" font weight : %s",v_weight)
3158 report(" font style : %s",v_style)
3159 report(" parent size : %s",size)
3160
3161 report(" used size : %s",v_size or defaultsize)
3162 end
3163
3164 local ecolored = v_fill ~= "" and v_fill or false
3165 local opacity = v_opacity ~= ignoredopacity and v_opacity or false
3166
3167
3168
3169 if ecolored then
3170 local r, g, b = colorcomponents(v_fill)
3171 if r and g and b then
3172 if opacity then
3173 t[#t+1] = f_color_b(r,g,b,opacity)
3174 else
3175 t[#t+1] = f_color_c(r,g,b)
3176 end
3177 elseif opacity then
3178 t[#t+1] = f_color_o(opacity)
3179 else
3180 ecolored = false
3181 end
3182 elseif opacity then
3183 t[#t+1] = f_color_o(opacity)
3184 end
3185
3186 local hasa = ax ~= 0 or ay ~= 0
3187 if hasa then
3188
3189 t[#t+1] = f_set(ax or 0,ay or 0)
3190 t[#t+1] = "{"
3191 end
3192 for i=1,nt do
3193 local di = dt[i]
3194 if type(di) == "table" then
3195
3196 if #di.dt > 0 then
3197 collect(tg,t,di,x,y,usedsize,usedscale,v_family)
3198 end
3199 else
3200
3201 if i == 1 then
3202 di = gsub(di,"^%s+","")
3203 end
3204 if i == nt then
3205 di = gsub(di,"%s+$","")
3206 end
3207 local chars = utfsplit(di)
3208 if svghash then
3209
3210 di = f_hashed(svghash[di])
3211 else
3212 if tx or ty or tdx or tdy then
3213 local txi, tyi, tdxi, tdyi
3214 for i=1,#chars do
3215 txi = tx and (tx [i] or txi )
3216 tyi = ty and (ty [i] or tyi )
3217 tdxi = tdx and (tdx[i] or tdxi) or 0
3218 tdyi = tdy and (tdy[i] or tdyi) or 0
3219 local dx = (txi and (txi - x) or 0) + tdxi
3220 local dy = (tyi and (tyi - y) or 0) + tdyi
3221 local ci = chars[i]
3222 if ci == " " then
3223 chars[i] = f_posspace(dx, dy)
3224 elseif sensitive[ci] then
3225 chars[i] = f_poscode(dx, dy, utfbyte(ci))
3226 else
3227 chars[i] = f_poschar(dx, dy, ci)
3228 end
3229 end
3230 di = "{" .. concat(chars) .. "}"
3231 t[#t+1] = di
3232 else
3233
3234
3235
3236
3237 for i=1,#chars do
3238 local ci = chars[i]
3239 if ci == " " then
3240 chars[i] = s_space
3241 elseif sensitive[ci] then
3242 chars[i] = f_code(utfbyte(ci))
3243 else
3244 chars[i] = f_char(ci)
3245
3246 end
3247 end
3248 di = concat(chars)
3249 t[#t+1] = di
3250 end
3251 end
3252 end
3253 end
3254 if hasa then
3255 if t[#t] == "{" then
3256 t[#t] = nil
3257 t[#t] = nil
3258 else
3259 t[#t+1] = "}"
3260 end
3261 end
3262
3263 if opacity or ecolored then
3264 t[#t+1] = "}"
3265 end
3266
3267 t[#t+1] = "}"
3268
3269 if newfont then
3270 t[#t+1] = "}"
3271 end
3272
3273 return t
3274 end
3275
3276
3277
3278
3279
3280 local textlevel = 0
3281
3282 function handlers.text(c)
3283 if textlevel == 0 then
3284 x_family = v_family
3285 x_weight = v_weight
3286 x_style = v_style
3287 end
3288
3289 textlevel = textlevel + 1
3290
3291 local only = fullstrip(xmltextonly(c))
3292 local at = c.at
3293 local x = rawget(at,"x")
3294 local y = rawget(at,"y")
3295
3296 local dx = rawget(at,"dx")
3297 local dy = rawget(at,"dy")
3298
3299 local tx = asnumber_vx_t(x)
3300 local ty = asnumber_vy_t(y)
3301
3302 local tdx = asnumber_vx_t(dx)
3303 local tdy = asnumber_vy_t(dy)
3304
3305 x = tx[1] or 0
3306 y = ty[1] or 0
3307
3308 dx = tdx[1] or 0
3309 dy = tdy[1] or 0
3310
3311 local v_fill = at["fill"]
3312 if not v_fill or v_fill == "none" then
3313 v_fill = "black"
3314 end
3315 local color, opacs, transform, opacity, option = fillproperties(v_fill,at)
3316 local anchor = anchors[at["text-anchor"] or "start"] or "drt"
3317 local remap = metapost.remappedtext(only)
3318
3319
3320 if remap then
3321 if x == 0 and y == 0 then
3322 only = f_mapped_simple_svg(remap.index)
3323 else
3324 only = f_mapped_normal_svg(remap.index,x,y)
3325 end
3326 flushobject(only,at,color,opacity)
3327 if trace_text then
3328 report("text: %s",only)
3329 end
3330 elseif option == "invisible" then
3331 if trace_text then
3332 report("invisible text: %s",only)
3333 end
3334 else
3335 local scale = 1
3336 local textid = 0
3337 local result = { }
3338 local nx = #tx
3339 local ny = #ty
3340 local ndx = #tdx
3341 local ndy = #tdy
3342
3343 local t = { }
3344 t[#t+1] = s_start
3345 if nx > 1 or ny > 1 or ndx > 1 or ndy > 1 then
3346 collect(tg,t,c,x,y,defaultsize,1,"serif",tx,ty,tdx,tdy)
3347 else
3348 collect(tg,t,c,x,y,defaultsize,1,"serif")
3349 end
3350 t[#t+1] = s_stop
3351 t = concat(t)
3352 if x == 0 and y == 0 then
3353 t = f_text_simple_svg(anchor,t)
3354 else
3355 t = f_text_normal_svg(anchor,t,x,y)
3356 end
3357
3358 flushobject(t,at,false,false)
3359 if trace_text then
3360 report("text: %s",result)
3361 end
3362 end
3363
3364 textlevel = textlevel - 1
3365 end
3366
3367 function metapost.reportsvgfonts()
3368 for family, weights in sortedhash(usedfonts) do
3369 for weight, styles in sortedhash(weights) do
3370 for style in sortedhash(styles) do
3371 report("used font: %s-%s-%s",family,weight,style)
3372 end
3373 end
3374 end
3375 end
3376
3377 statistics.register("used svg fonts",function()
3378 if next(usedfonts) then
3379
3380 logs.startfilelogging(report,"used svg fonts")
3381 local t = { }
3382 for family, weights in sortedhash(usedfonts) do
3383 for weight, styles in sortedhash(weights) do
3384 for style in sortedhash(styles) do
3385 report("%s-%s-%s",family,weight,style)
3386 t[#t+1] = formatters["%s-%s-%s"](family,weight,style)
3387 end
3388 end
3389 end
3390 logs.stopfilelogging()
3391 return concat(t," ")
3392 end
3393 end)
3394
3395 end
3396
3397 function handlers.svg(c,x,y,w,h,noclip,notransform,normalize)
3398 local at = c.at
3399
3400 local wrapupviewport
3401 local bhacked
3402 local ehacked
3403 local wd = w
3404
3405 local xpct, ypct, rpct
3406
3407 local btransform, etransform, transform = handletransform(at)
3408
3409 if trace then
3410 report("view: %s, xpct %N, ypct %N","before",percentage_x,percentage_y)
3411 end
3412
3413 local viewbox = at.viewBox
3414
3415 if viewbox then
3416 x, y, w, h = handleviewbox(viewbox)
3417 if trace then
3418 report("viewbox: x %N, y %N, width %N, height %N",x,y,w,h)
3419 end
3420 end
3421 if not w or not h or w == 0 or h == 0 then
3422 noclip = true
3423 end
3424 if h then
3425
3426
3427
3428
3429
3430
3431 xpct = percentage_x
3432 ypct = percentage_y
3433 rpct = percentage_r
3434 percentage_x = w / 100
3435 percentage_y = h / 100
3436 percentage_r = (sqrt(w^2 + h^2) / sqrt(2)) / 100
3437 if trace then
3438 report("view: %s, xpct %N, ypct %N","inside",percentage_x,percentage_y)
3439 end
3440 wrapupviewport = viewport(x,y,w,h,noclip)
3441 end
3442
3443
3444
3445 if v and normalize and w and wd and w ~= wd and w > 0 and wd > 0 then
3446 bhacked = s_wrapped_start
3447 ehacked = f_wrapped_stop(y or 0,wd/w)
3448 end
3449 if btransform then
3450 r = r + 1 ; result[r] = btransform
3451 end
3452 if bhacked then
3453 r = r + 1 ; result[r] = bhacked
3454 end
3455 local boffset, eoffset = handleoffset(at)
3456 if boffset then
3457 r = r + 1 result[r] = boffset
3458 end
3459
3460 at["transform"] = false
3461 at["viewBox"] = false
3462
3463 process(c,"/!(defs|symbol)")
3464
3465 at["transform"] = transform
3466 at["viewBox"] = viewbox
3467
3468 if eoffset then
3469 r = r + 1 result[r] = eoffset
3470 end
3471 if ehacked then
3472 r = r + 1 ; result[r] = ehacked
3473 end
3474 if etransform then
3475 r = r + 1 ; result[r] = etransform
3476 end
3477 if h then
3478
3479
3480
3481
3482 percentage_x = xpct
3483 percentage_y = ypct
3484 percentage_r = rpct
3485 if wrapupviewport then
3486 wrapupviewport()
3487 end
3488 end
3489 if trace then
3490 report("view: %s, xpct %N, ypct %N","after",percentage_x,percentage_y)
3491 end
3492 end
3493
3494 end
3495
3496 process = function(x,p)
3497 for c in xmlcollected(x,p) do
3498 local tg = c.tg
3499 local h = handlers[c.tg]
3500 if h then
3501 h(c)
3502 end
3503 end
3504 end
3505
3506
3507
3508
3509 function metapost.svgtomp(specification,pattern,notransform,normalize)
3510 local mps = ""
3511 local svg = specification.data
3512 images.resetstore("svg")
3513 if type(svg) == "string" then
3514 svg = xmlconvert(svg)
3515 end
3516 if svg then
3517 local c = xmlfirst(svg,pattern or "/svg")
3518 if c then
3519 root = svg
3520 result = { }
3521 r = 0
3522 definitions = { }
3523 tagstyles = { }
3524 classstyles = { }
3525 colormap = specification.colormap
3526 usedcolors = trace_colors and setmetatableindex("number") or false
3527 for s in xmlcollected(c,"style") do
3528 handlestyle(c)
3529 end
3530 handlechains(c)
3531 xmlinheritattributes(c)
3532 handledefinitions(c)
3533 handlers.svg (
3534 c,
3535 specification.x,
3536 specification.y,
3537 specification.width,
3538 specification.height,
3539 specification.noclip,
3540 notransform,
3541 normalize,
3542 specification.remap
3543 )
3544 if trace_result == "file" then
3545 io.savedata(
3546 tex.jobname .. "-svg-to-mp.tex",
3547 "\\startMPpage[instance=doublefun]\n" .. concat(result,"\n") .. "\n\\stopMPpage\n"
3548 )
3549 elseif trace_result then
3550 report("result graphic:\n %\n t",result)
3551 end
3552 if usedcolors and next(usedcolors) then
3553 report("graphic %a uses colors: %s",specification.id or "unknown",table.sequenced(usedcolors))
3554 end
3555 mps = concat(result," ")
3556 root = false
3557 result = false
3558 r = false
3559 definitions = false
3560 tagstyles = false
3561 classstyles = false
3562 colormap = false
3563 else
3564 report("missing svg root element")
3565 end
3566 else
3567 report("bad svg blob")
3568 end
3569 return mps
3570 end
3571
3572end
3573
3574
3575
3576
3577
3578do
3579
3580 local bpfactor <const> = number.dimenfactors.bp
3581
3582 function metapost.includesvgfile(filename,offset)
3583 local fullname = resolvers.findbinfile(filename)
3584 if lfs.isfile(fullname) then
3585 context.startMPcode("doublefun")
3586 context('draw lmt_svg [ filename = "%s", offset = %N ] ;',filename,(offset or 0)*bpfactor)
3587 context.stopMPcode()
3588 end
3589 end
3590
3591 function metapost.includesvgbuffer(name,offset)
3592 context.startMPcode("doublefun")
3593 context('draw lmt_svg [ buffer = "%s", offset = %N ] ;',name or "",(offset or 0)*bpfactor)
3594 context.stopMPcode()
3595 end
3596
3597 interfaces.implement {
3598 name = "includesvgfile",
3599 actions = metapost.includesvgfile,
3600 arguments = { "string", "dimension" },
3601 }
3602
3603 interfaces.implement {
3604 name = "includesvgbuffer",
3605 actions = metapost.includesvgbuffer,
3606 arguments = { "string", "dimension" },
3607 }
3608
3609 function metapost.showsvgpage(data)
3610 local dd = data.data
3611 if not dd then
3612 local filename = data.filename
3613 local fullname = filename and resolvers.findbinfile(filename)
3614 dd = fullname and table.load(fullname)
3615 end
3616 if type(dd) == "table" then
3617 local comment = data.comment
3618 local offset = data.pageoffset
3619 local index = data.index
3620 local first = math.max(index or 1,1)
3621 local last = math.min(index or #dd,#dd)
3622 for i=first,last do
3623 local d = setmetatableindex( {
3624 data = dd[i],
3625 comment = comment and i or false,
3626 pageoffset = offset or nil,
3627 }, data)
3628 metapost.showsvgpage(d)
3629 end
3630 elseif data.method == "code" then
3631 context.startMPcode(doublefun)
3632 context(metapost.svgtomp(data))
3633 context.stopMPcode()
3634 else
3635 context.startMPpage { instance = "doublefun", offset = data.pageoffset or nil }
3636 context(metapost.svgtomp(data))
3637 local comment = data.comment
3638 if comment then
3639 context("draw boundingbox currentpicture withcolor .6red ;")
3640 context('draw textext.bot("\\strut\\tttf %s") ysized (10pt) shifted center bottomboundary currentpicture ;',comment)
3641 end
3642 context.stopMPpage()
3643 end
3644 end
3645
3646 function metapost.typesvgpage(data)
3647 local dd = data.data
3648 if not dd then
3649 local filename = data.filename
3650 local fullname = filename and resolvers.findbinfile(filename)
3651 dd = fullname and table.load(fullname)
3652 end
3653 if type(dd) == "table" then
3654 local index = data.index
3655 if index and index > 0 and index <= #dd then
3656 data = dd[index]
3657 else
3658 data = nil
3659 end
3660 end
3661 if type(data) == "string" and data ~= "" then
3662 buffers.assign("svgpage",data)
3663 context.typebuffer ({ "svgpage" }, { option = "XML", strip = "yes" })
3664 end
3665 end
3666
3667 function metapost.svgtopdf(data,...)
3668 local mps = metapost.svgtomp(data,...)
3669 if mps then
3670
3671 local pdf = metapost.simple("metafun",mps,true,false,"svg")
3672 if pdf then
3673 return pdf
3674 else
3675
3676 end
3677 else
3678
3679 end
3680 end
3681
3682end
3683
3684do
3685
3686 local runner = sandbox.registerrunner {
3687 name = "otfsvg2pdf",
3688 program = "context",
3689 template = "--batchmode --purgeall --runs=2 %filename%",
3690 reporter = report_svg,
3691 }
3692
3693
3694
3695
3696
3697 local decompress = gzip.decompress
3698 local compress = gzip.compress
3699
3700 function metapost.svgshapestopdf(svgshapes,pdftarget,report_svg)
3701 local texname = "temp-otf-svg-to-pdf.tex"
3702 local pdfname = "temp-otf-svg-to-pdf.pdf"
3703 local tucname = "temp-otf-svg-to-pdf.tuc"
3704 local nofshapes = #svgshapes
3705 local pdfpages = { filename = pdftarget }
3706 local pdfpage = 0
3707 local t = { }
3708 local n = 0
3709
3710 os.remove(texname)
3711 os.remove(pdfname)
3712 os.remove(tucname)
3713
3714 if report_svg then
3715 report_svg("processing %i svg containers",nofshapes)
3716 statistics.starttiming(pdfpages)
3717 end
3718
3719
3720
3721
3722
3723 n = n + 1 ; t[n] = "\\starttext"
3724 n = n + 1 ; t[n] = "\\setupMPpage[alternative=offset,instance=doublefun]"
3725
3726 for i=1,nofshapes do
3727 local entry = svgshapes[i]
3728 local data = entry.data
3729 if decompress then
3730 data = decompress(data) or data
3731 end
3732 local specification = {
3733 data = xmlconvert(data),
3734 x = 0,
3735 y = 1000,
3736 width = 1000,
3737 height = 1000,
3738 noclip = true,
3739 }
3740 for index=entry.first,entry.last do
3741 if not pdfpages[index] then
3742 pdfpage = pdfpage + 1
3743 pdfpages[index] = pdfpage
3744 local pattern = "/svg[@id='glyph" .. index .. "']"
3745 n = n + 1 ; t[n] = "\\startMPpage"
3746 n = n + 1 ; t[n] = metapost.svgtomp(specification,pattern,true,true) or ""
3747 n = n + 1 ; t[n] = "\\stopMPpage"
3748 end
3749 end
3750 end
3751 n = n + 1 ; t[n] = "\\stoptext"
3752 io.savedata(texname,concat(t,"\n"))
3753 runner { filename = texname }
3754 os.remove(pdftarget)
3755 file.copy(pdfname,pdftarget)
3756 if report_svg then
3757 statistics.stoptiming(pdfpages)
3758 report_svg("svg conversion time %s",statistics.elapsedseconds(pdfpages))
3759 end
3760 os.remove(texname)
3761 os.remove(pdfname)
3762 os.remove(tucname)
3763 return pdfpages
3764 end
3765
3766 function metapost.svgshapestomp(svgshapes,report_svg)
3767 local nofshapes = #svgshapes
3768 local mpshapes = { }
3769 if report_svg then
3770 report_svg("processing %i svg containers",nofshapes)
3771 statistics.starttiming(mpshapes)
3772 end
3773 for i=1,nofshapes do
3774 local entry = svgshapes[i]
3775 local data = entry.data
3776 if decompress then
3777 data = decompress(data) or data
3778 end
3779 local specification = {
3780 data = xmlconvert(data),
3781 x = 0,
3782 y = 1000,
3783 width = 1000,
3784 height = 1000,
3785 noclip = true,
3786 }
3787 for index=entry.first,entry.last do
3788 if not mpshapes[index] then
3789 local pattern = "/svg[@id='glyph" .. index .. "']"
3790 local mpcode = metapost.svgtomp(specification,pattern,true,true) or ""
3791 if mpcode ~= "" and compress then
3792 mpcode = compress(mpcode) or mpcode
3793 end
3794 mpshapes[index] = mpcode
3795 end
3796 end
3797 end
3798 if report_svg then
3799 statistics.stoptiming(mpshapes)
3800 report_svg("svg conversion time %s",statistics.elapsedseconds(mpshapes))
3801 end
3802 return mpshapes
3803 end
3804
3805 function metapost.svgglyphtomp(fontname,unicode)
3806 if fontname and unicode then
3807 local id = fonts.definers.internal { name = fontname }
3808 if id then
3809 local tfmdata = fonts.hashes.identifiers[id]
3810 if tfmdata then
3811 local properties = tfmdata.properties
3812 local svg = properties.svg
3813 local hash = svg and svg.hash
3814 local timestamp = svg and svg.timestamp
3815 if hash then
3816 local svgfile = containers.read(fonts.handlers.otf.svgcache,hash)
3817 local svgshapes = svgfile and svgfile.svgshapes
3818 if svgshapes then
3819 if type(unicode) == "string" then
3820 unicode = utfbyte(unicode)
3821 end
3822 local chardata = tfmdata.characters[unicode]
3823 local index = chardata and chardata.index
3824 if index then
3825 for i=1,#svgshapes do
3826 local entry = svgshapes[i]
3827 if index >= entry.first and index <= entry.last then
3828 local data = entry.data
3829 if data then
3830 local root = xml.convert(gzip.decompress(data) or data)
3831 return metapost.svgtomp (
3832 {
3833 data = root,
3834 x = 0,
3835 y = 1000,
3836 width = 1000,
3837 height = 1000,
3838 noclip = true,
3839 },
3840 "/svg[@id='glyph" .. index .. "']",
3841 true,
3842 true
3843 )
3844 end
3845 end
3846 end
3847 end
3848 end
3849 end
3850 end
3851 end
3852 end
3853 end
3854
3855end
3856 |
