-
Notifications
You must be signed in to change notification settings - Fork 1
/
index.js
467 lines (445 loc) · 18.2 KB
/
index.js
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
var fs = require('fs')
var makePNG = require('fast-png')
var binpack = require('bin-pack')
var expand = require('brace-expansion')
var evalExpr = require('./lib/expr.js')
var settings = require('./settings.js')()
var zoomStart = settings.zoomStart
var zoomEnd = settings.zoomEnd //inclusive
var roffset = [0,0]
module.exports = function (opts, cb) {
var defaults = opts.defaults
var stylesheet = opts.stylesheet
parseKeys(stylesheet)
var spriteFiles = getSpriteFiles(stylesheet)
readSpriteFiles(spriteFiles, function (err, sprites) {
if (err) cb(err)
else cb(null, write(sprites, opts))
})
}
function write (sprites, opts) {
var fkeys = opts.features
var aSprites = []
var spriteKeys = Object.keys(sprites)
for (var i = 0; i < spriteKeys.length; i++) {
var key = spriteKeys[i]
aSprites.push(sprites[key])
sprites[key].index = i
}
var packedSprites = binpack(aSprites, { inPlace: true })
var smHeight = Math.ceil(spriteKeys.length*2/fkeys.length)
var totalHeight = settings.fbTotalHeight + smHeight + packedSprites.height
var totalWidth = Math.max(settings.imageWidth, packedSprites.width)
var dataLength = 4*totalWidth*totalHeight
var data = new Uint8Array(dataLength)
writeFeatures(data, opts, totalWidth, sprites)
writeSpriteMeta(data, opts, aSprites)
writeSprites(data, totalWidth, aSprites)
return {
data,
width: totalWidth,
height: totalHeight
}
}
function writeSpriteMeta(data, opts, sprites) {
var spriteKeys = Object.keys(sprites)
var heights = settings.fbHeights
var fkeys = opts.features
var y0 = heights.point + heights.line + heights.area + heights.areaborder
for (var i=0; i<sprites.length; i++) {
var s = sprites[i]
var y = Math.floor(i/fkeys.length)*2
var x = i%fkeys.length
var isVector = false
var offset = findOffset(x, y0+y+0)
data[offset+0] = Math.floor(s.width/256)
data[offset+1] = s.width%256
var h0 = Math.floor(s.height/256) + (isVector ? 127 : 0)
data[offset+2] = h0
data[offset+3] = s.height%256
var offset = findOffset(x, y0+y+1)
var soffset = [s.x, s.y]
data[offset+0] = Math.floor(soffset[0])
data[offset+1] = soffset[0]%256
data[offset+2] = Math.floor(soffset[1]/256)
data[offset+3] = soffset[1]%256
}
}
function writeSprites (data, totalWidth, sprites) {
var x0 = 0
var y0 = settings.fbTotalHeight
for (var i=0; i<sprites.length; i++) {
var s = sprites[i]
var sx = s.x+x0
var sy = s.y+y0
for (var j=0; j<s.data.length; j+=4) {
reverseFindOffset(roffset, j/4, s.width)
var offset = findOffset(roffset[0]+sx, roffset[1]+sy, totalWidth)
data[offset+0] = s.data[j]
data[offset+1] = s.data[j+1]
data[offset+2] = s.data[j+2]
data[offset+3] = s.data[j+3]
}
}
}
function reverseFindOffset (out, index, spriteWidth, spriteHeight) {
out[0] = index%spriteWidth
out[1] = Math.floor(index/spriteWidth)
return out
}
function writeFeatures(data, opts, totalWidth, sprites) {
var defaults = opts.defaults
var stylesheet = opts.stylesheet
var fkeys = opts.features
var heights = settings.fbHeights
parseZooms(stylesheet)
for (var z = zoomStart; z <= zoomEnd; z++) { //point
for (var x = 0; x < fkeys.length; x++) {
var offset = findOffset(x, 7*(z-zoomStart)+0, totalWidth)
var a = parseHex(getStyle(defaults, stylesheet, fkeys[x], "point-fill-color", z))
data[offset+0] = a[0] //r
data[offset+1] = a[1] //g
data[offset+2] = a[2] //b
data[offset+3] = getStyle(defaults, stylesheet, fkeys[x], "point-opacity", z) //a
}
for (var x = 0; x < fkeys.length; x++) {
var offset = findOffset(x, 7*(z-zoomStart)+1, totalWidth)
var b = parseHex(getStyle(defaults, stylesheet, fkeys[x], "point-stroke-color", z))
data[offset+0] = b[0] //r
data[offset+1] = b[1] //g
data[offset+2] = b[2] //b
data[offset+3] = getStyle(defaults, stylesheet, fkeys[x], "point-opacity", z) //a
}
for (var x = 0; x < fkeys.length; x++) {
var offset = findOffset(x, 7*(z-zoomStart)+2, totalWidth)
data[offset+0] = getStyle(defaults, stylesheet, fkeys[x], "point-size", z)
data[offset+1] = getStyle(defaults, stylesheet, fkeys[x], "point-stroke-width-inner", z)
data[offset+2] = getStyle(defaults, stylesheet, fkeys[x], "point-stroke-width-outer", z)
data[offset+3] = getStyle(defaults, stylesheet, fkeys[x], "point-zindex", z)
}
for (var x = 0; x < fkeys.length; x++) {
var offset = findOffset(x, 7*(z-zoomStart)+3, totalWidth)
var plfrgb = parseHex(getStyle(defaults, stylesheet, fkeys[x], "point-label-fill-color", z))
data[offset+0] = plfrgb[0] //r
data[offset+1] = plfrgb[1] //g
data[offset+2] = plfrgb[2] //b
data[offset+3] = getStyle(defaults, stylesheet, fkeys[x], "point-label-fill-opacity", z) //a
}
for (var x = 0; x < fkeys.length; x++) {
var offset = findOffset(x, 7*(z-zoomStart)+4, totalWidth)
var plsrgb = parseHex(getStyle(defaults, stylesheet, fkeys[x], "point-label-stroke-color", z))
data[offset+0] = plsrgb[0] //r
data[offset+1] = plsrgb[1] //g
data[offset+2] = plsrgb[2] //b
data[offset+3] = getStyle(defaults, stylesheet, fkeys[x], "point-label-stroke-opacity", z) //a
}
for (var x = 0; x < fkeys.length; x++) {
var offset = findOffset(x, 7*(z-zoomStart)+5, totalWidth)
data[offset+0] = getStyle(defaults, stylesheet, fkeys[x], "point-label-font", z)
data[offset+1] = getStyle(defaults, stylesheet, fkeys[x], "point-label-font-size", z)
data[offset+2] = getStyle(defaults, stylesheet, fkeys[x], "point-label-priority", z)
data[offset+3] = getStyle(defaults, stylesheet, fkeys[x], "point-label-constraints", z)
}
for (var x = 0; x < fkeys.length; x++) {
var offset = findOffset(x, 7*(z-zoomStart)+6, totalWidth)
data[offset+0] = getStyle(defaults, stylesheet, fkeys[x], "point-label-stroke-width", z)
var file = getStyle(defaults, stylesheet, fkeys[x], "point-sprite", z)
var si = file === undefined ? 0 : sprites[file].index + 1
data[offset+1] = Math.floor(si/256)
data[offset+2] = si%256
data[offset+3] = 0
}
}
var y = heights.point
for (var z = zoomStart; z <= zoomEnd; z++) { //line
for (var x = 0; x < fkeys.length; x++) {
var offset = findOffset(x, y+8*(z-zoomStart)+0, totalWidth)
var b = parseHex(getStyle(defaults, stylesheet, fkeys[x], "line-fill-color", z))
data[offset+0] = b[0] //r
data[offset+1] = b[1] //g
data[offset+2] = b[2] //b
data[offset+3] = getStyle(defaults, stylesheet, fkeys[x], "line-opacity", z) //a
}
for (var x = 0; x < fkeys.length; x++) {
var offset = findOffset(x, y+8*(z-zoomStart)+1, totalWidth)
var c = parseHex(getStyle(defaults, stylesheet, fkeys[x], "line-stroke-color", z))
data[offset+0] = c[0] //r
data[offset+1] = c[1] //g
data[offset+2] = c[2] //b
data[offset+3] = getStyle(defaults, stylesheet, fkeys[x], "line-opacity", z) //a
}
for (var x = 0; x < fkeys.length; x++) {
var offset = findOffset(x, y+8*(z-zoomStart)+2, totalWidth)
var lineStyleFill = parseLineStyle(defaults, stylesheet, fkeys[x], 'fill')
var lineStyleStroke = parseLineStyle(defaults, stylesheet, fkeys[x], 'stroke')
data[offset+0] = lineStyleFill.dashLength
data[offset+1] = lineStyleFill.dashGap
data[offset+2] = lineStyleStroke.dashLength
data[offset+3] = lineStyleStroke.dashGap
}
for (var x = 0; x < fkeys.length; x++) {
var offset = findOffset(x, y+8*(z-zoomStart)+3, totalWidth)
data[offset+0] = getStyle(defaults, stylesheet, fkeys[x], "line-fill-width", z)
data[offset+1] = getStyle(defaults, stylesheet, fkeys[x], "line-stroke-width", z) //line-stroke-width-inner
data[offset+2] =
data[offset+2] = getStyle(defaults, stylesheet, fkeys[x], "line-stroke-width-outer", z)
data[offset+3] = getStyle(defaults, stylesheet, fkeys[x], "line-zindex", z)
}
for (var x = 0; x < fkeys.length; x++) {
var llfrgb = parseHex(getStyle(defaults, stylesheet, fkeys[x], "line-label-fill-color", z))
var offset = findOffset(x, y+8*(z-zoomStart)+4, totalWidth)
data[offset+0] = llfrgb[0] //r
data[offset+1] = llfrgb[1] //g
data[offset+2] = llfrgb[2] //b
data[offset+3] = getStyle(defaults, stylesheet, fkeys[x], "line-label-fill-opacity", z) //a
}
for (var x = 0; x < fkeys.length; x++) {
var llsrgb = parseHex(getStyle(defaults, stylesheet, fkeys[x], "line-label-stroke-color", z))
var offset = findOffset(x, y+8*(z-zoomStart)+5, totalWidth)
data[offset+0] = llsrgb[0] //r
data[offset+1] = llsrgb[1] //g
data[offset+2] = llsrgb[2] //b
data[offset+3] = getStyle(defaults, stylesheet, fkeys[x], "line-label-stroke-opacity", z) //a
}
for (var x = 0; x < fkeys.length; x++) {
var offset = findOffset(x, y+8*(z-zoomStart)+6, totalWidth)
data[offset+0] = getStyle(defaults, stylesheet, fkeys[x], "line-label-font", z)
data[offset+1] = getStyle(defaults, stylesheet, fkeys[x], "line-label-font-size", z)
data[offset+2] = getStyle(defaults, stylesheet, fkeys[x], "line-label-priority", z)
data[offset+3] = getStyle(defaults, stylesheet, fkeys[x], "line-label-constraints", z)
}
for (var x = 0; x < fkeys.length; x++) {
var offset = findOffset(x, y+8*(z-zoomStart)+7, totalWidth)
data[offset+0] = getStyle(defaults, stylesheet, fkeys[x], "line-label-stroke-width", z)
var file = getStyle(defaults, stylesheet, fkeys[x], "line-label-sprite", z)
var si = file === undefined ? 0 : sprites[file].index + 1
data[offset+1] = Math.floor(si/256)
data[offset+2] = si%256
data[offset+3] = getStyle(defaults, stylesheet, fkeys[x], "line-label-sprite-placement", z)
}
}
var y = heights.point + heights.line
for (var z = zoomStart; z <= zoomEnd; z++) { //area
for (var x = 0; x < fkeys.length; x++) {
var offset = findOffset(x, y+6*(z-zoomStart)+0, totalWidth)
var e = parseHex(getStyle(defaults, stylesheet, fkeys[x], "area-fill-color", z))
data[offset+0] = e[0] //r
data[offset+1] = e[1] //g
data[offset+2] = e[2] //b
data[offset+3] = getStyle(defaults, stylesheet, fkeys[x], "area-opacity", z) //a
}
for (var x = 0; x < fkeys.length; x++) {
var offset = findOffset(x, y+6*(z-zoomStart)+1, totalWidth)
data[offset+0] = getStyle(defaults, stylesheet, fkeys[x], "area-zindex", z)
data[offset+1] = getStyle(defaults, stylesheet, fkeys[x], "area-label-stroke-width", z)
var file = getStyle(defaults, stylesheet, fkeys[x], "area-fill-pattern", z)
var si = file === undefined ? 0 : sprites[file].index + 1
data[offset+2] = Math.floor(si/256)
data[offset+3] = si%256
}
for (var x = 0; x < fkeys.length; x++) {
var offset = findOffset(x, y+6*(z-zoomStart)+2, totalWidth)
var alfrgb = parseHex(getStyle(defaults, stylesheet, fkeys[x], "area-label-fill-color", z))
data[offset+0] = alfrgb[0] //area-label-fill-color R
data[offset+1] = alfrgb[1] //area-label-fill-color G
data[offset+2] = alfrgb[2] //area-label-fill-color B
data[offset+3] = getStyle(defaults, stylesheet, fkeys[x], "area-label-fill-opacity", z) //a
}
for (var x = 0; x < fkeys.length; x++) {
var offset = findOffset(x, y+6*(z-zoomStart)+3, totalWidth)
var alsrgb = parseHex(getStyle(defaults, stylesheet, fkeys[x], "area-label-stroke-color", z))
data[offset+0] = alsrgb[0] //area-label-stroke-color R
data[offset+1] = alsrgb[1] //area-label-stroke-color G
data[offset+2] = alsrgb[2] //area-label-stroke-color B
data[offset+3] = getStyle(defaults, stylesheet, fkeys[x], "area-label-stroke-opacity", z) //a
}
for (var x = 0; x < fkeys.length; x++) {
var offset = findOffset(x, y+6*(z-zoomStart)+4, totalWidth)
data[offset+0] = getStyle(defaults, stylesheet, fkeys[x], "area-label-font", z)
data[offset+1] = getStyle(defaults, stylesheet, fkeys[x], "area-label-font-size", z)
data[offset+2] = getStyle(defaults, stylesheet, fkeys[x], "area-label-priority", z)
data[offset+3] = getStyle(defaults, stylesheet, fkeys[x], "area-label-constraints", z)
}
for (var x = 0; x < fkeys.length; x++) {
var offset = findOffset(x, y+6*(z-zoomStart)+5, totalWidth)
var file = getStyle(defaults, stylesheet, fkeys[x], "area-label-sprite", z)
var si = file === undefined ? 0 : sprites[file].index + 1
data[offset+0] = Math.floor(si/256)
data[offset+1] = si%256
data[offset+2] = getStyle(defaults, stylesheet, fkeys[x], "area-label-sprite-placement", z)
data[offset+3] = 255 //reserved
}
}
var y = heights.point + heights.line + heights.area
for (var z = zoomStart; z <= zoomEnd; z++) { //areaborder
for (var x = 0; x < fkeys.length; x++) {
var offset = findOffset(x, y+3*(z-zoomStart)+0, totalWidth)
var f = parseHex(getStyle(defaults, stylesheet, fkeys[x], "area-border-color", z))
data[offset+0] = f[0] //r
data[offset+1] = f[1] //g
data[offset+2] = f[2] //b
data[offset+3] = getStyle(defaults, stylesheet, fkeys[x], "area-border-opacity", z) //a
}
for (var x = 0; x < fkeys.length; x++) {
var offset = findOffset(x, y+3*(z-zoomStart)+1, totalWidth)
var areaBorderStyle = parseAreaBorderStyle (defaults, stylesheet, fkeys[x], z)
data[offset+0] = areaBorderStyle.dashLength
data[offset+1] = areaBorderStyle.dashGap
data[offset+2] = getStyle(defaults, stylesheet, fkeys[x], "area-border-width", z) //areaborder-width-inner
data[offset+3] = getStyle(defaults, stylesheet, fkeys[x], "area-border-width-outer", z)
}
for (var x = 0; x < fkeys.length; x++) {
var offset = findOffset(x, y+3*(z-zoomStart)+2, totalWidth)
data[offset+0] = getStyle(defaults, stylesheet, fkeys[x], "area-border-zindex", z)
var file = getStyle(defaults, stylesheet, fkeys[x], "area-border-sprite", z)
var si = file === undefined ? 0 : sprites[file].index + 1
data[offset+1] = Math.floor(si/256)
data[offset+2] = si%256
data[offset+3] = 255 //reserved
}
}
}
function parseHex (hex) {
return hex.match(/([0-9a-f]{2})/ig).map(s => parseInt(s,16))
}
function parseLineStyle (defaults, stylesheet, type, property) {
var style = getStyle(defaults, stylesheet, type, `line-${property}-style`)
var x = getStyle(defaults, stylesheet, type, `line-${property}-dash-length`)
var y = getStyle(defaults, stylesheet, type, `line-${property}-dash-gap`)
var lineStyle = {}
if (style === "solid") {
lineStyle['dashLength'] = 1
lineStyle['dashGap'] = 0
}
if (style === "dot") {
lineStyle['dashLength'] = 3
lineStyle['dashGap'] = y
}
if (style === "dash") {
lineStyle['dashLength'] = x
lineStyle['dashGap'] = y
}
return lineStyle
}
function parseAreaBorderStyle (defaults, stylesheet, type, zoom) {
var style = getStyle(defaults, stylesheet, type, `area-border-style`, zoom)
var x = getStyle(defaults, stylesheet, type, `area-border-dash-length`, zoom)
var y = getStyle(defaults, stylesheet, type, `area-border-dash-gap`, zoom)
var areaBorderStyle = {}
if (style === "solid") {
areaBorderStyle['dashLength'] = 1
areaBorderStyle['dashGap'] = 0
}
if (style === "dot") {
areaBorderStyle['dashLength'] = 3
areaBorderStyle['dashGap'] = y || 2
}
if (style === "dash") {
areaBorderStyle['dashLength'] = x || 5
areaBorderStyle['dashGap'] = y || 5
}
return areaBorderStyle
}
function getStyle (defaults, stylesheet, type, property, zoom) {
var x = getProp(stylesheet[type], property, zoom)
if (x !== undefined) return x
if (type !== undefined) {
var dtype = type.split('.')[0]+'.*'
var y = getProp(stylesheet[dtype], property, zoom)
if (y !== undefined) return y
}
var z = getProp(stylesheet['*'], property, zoom)
if (z !== undefined) return z
else return defaults[property]
}
function getProp (rules, property, zoom) {
if (!rules) return undefined
var zkey = property + "[zoom=" + zoom + "]"
if (rules[zkey] !== undefined) {
return rules[zkey]
}
if (rules[property] !== undefined) {
return rules[property]
}
}
function parseZooms (stylesheet) {
var vars = { zoom: 0 }
var keys = Object.keys(stylesheet)
for (var i=0; i<keys.length; i++) {
var pkeys = Object.keys(stylesheet[keys[i]])
for (var j=0; j<pkeys.length; j++) {
var m = /([\w-]+)(?:\s*\[([^\]]*)\]\s*)/.exec(pkeys[j])
if (!m) continue
for (var zoom=zoomStart; zoom<=zoomEnd; zoom++) {
vars.zoom = zoom
if (!evalExpr(m[2], vars)) continue
var zkey = m[1] + "[zoom=" + zoom + "]"
stylesheet[keys[i]][zkey] = stylesheet[keys[i]][pkeys[j]]
}
}
}
return stylesheet
}
function parseKeys (stylesheet) {
var keys = Object.keys(stylesheet)
for (var i=0; i<keys.length; i++) {
var re = /((?:{[^}]+}|[^,])+)\s*(?:,|$)\s*/g
var m
var nmatches = 0
while (m = re.exec(keys[i])) {
var e = expand(m[1])
for (var j=0; j<e.length; j++) {
nmatches++
stylesheet[e[j]] = stylesheet[keys[i]]
}
}
if (nmatches > 1) {
delete stylesheet[keys[i]]
}
}
return stylesheet
}
function getSpriteFiles (stylesheet) {
var spriteFileNames = new Set()
var keys = Object.keys(stylesheet)
var re = /(-sprite)+|(-pattern)+/g
for (var i=0; i<keys.length; i++) {
if (stylesheet[keys[i]] !== undefined) {
k = Object.keys(stylesheet[keys[i]])
for (var j=0; j<k.length; j++) {
if (re.test(k[j])) {
spriteFileNames.add(stylesheet[keys[i]][k[j]])
}
}
}
}
return spriteFileNames
}
function fileExists (fileName, cb) {
fs.stat(fileName, function (error, stats) {
if (error && error.code === 'ENOENT') cb(null, false)
else if (error) cb(error)
else cb(null, stats.isFile())
})
}
function readSpriteFiles (spriteFileNames, cb) {
var pending = 1
var sprites = {}
spriteFileNames.forEach(file => {
pending++
fs.readFile(file, function onRead (err, buf) {
if (err) {
var f = cb
cb = noop
return f(err)
}
sprites[file] = makePNG.decode(buf)
if (--pending === 0) cb(null, sprites)
})
})
if (--pending === 0) cb(null, sprites)
}
function findOffset(x, y, imageWidth) {
return (x + imageWidth * y) * 4
}
function noop () {}