feat(stdlib): Tiled P0.5 — TMX/TSX reader over the XML reader (#68)
Tiled.read / Tiled.read_tsx (runtime/native/tiled.ludic): map the native
XML formats (TMX/TSX/TX) onto the SAME intermediate the JSON path produces
— a Value tree in Tiled's JSON schema — so one format-independent core
(P1) consumes either reader.
- tmx_to_value walks a <map> into {orientation, width/height, tilewidth/
height, tilesets[], layers[]}; every tile layer's <data> is decoded to a
dense GID int list (CSV split, or base64 -> zlib/gzip inflate ->
little-endian u32s), so a CSV .tmx and a base64 .tmj of the same map read
structurally identically.
- External tilesets keep the {firstgid, source} reference (as TMJ does);
embedded tilesets and standalone .tsx (tsx_to_value) inline full geometry
+ per-tile metadata (animation frames, collision objectgroup, class,
properties) for later phases.
- Object layers, shapes (rect/ellipse/point/polygon/polyline/text),
image/group layers and custom properties are parsed into the tree now so
P2/P4/P5 just read it.
- tmj_normalize decodes base64 `data` strings in a parsed .tmj so the JSON
path matches the XML path.
Proven by library/tiled_p05.ludic (30 assertions) incl. the in-repo Kenney
sampleMap.tmx + external sampleSheet.tsx and TMX-vs-TMJ structural
identity. Docs + inventory added; x test: 91 passed.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
This commit is contained in:
parent
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runtime/native/tiled.ludic
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runtime/native/tiled.ludic
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# ============================================================================
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# tiled.ludic — Tiled map support (`Tiled.*`), the design record of #66
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# (issues #67–#74). Native TMX/TSX/TX (XML) and TMJ/TSJ/TJ (JSON) both map onto
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# ONE intermediate — a generic `Value.*` tree in Tiled's JSON schema — and one
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# format-independent core turns that into the runtime map model. So the two
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# readers below (P0.5, #68) each feed the same `rt_tmap` builder (P1, #69).
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#
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# The JSON path is `Json.parse` + a normalisation pass; the XML path is the
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# `xml_parse` walk in this file. Layer data is decoded to a dense GID int list at
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# read time (CSV split, or base64 -> zlib/gzip inflate -> little-endian u32s), so
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# a CSV `.tmx` and a base64 `.tmj` of the same map yield structurally identical
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# trees.
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#
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# ludicc splices this file (with core + xml + base64 + value) when a program
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# mentions `Tiled.*` (parse.ludic).
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# ============================================================================
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# ---- layer-data decode -----------------------------------------------------
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# a CSV of GIDs -> a Value list of int nodes. Non-digit separators (commas,
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# whitespace, newlines) delimit; overflow wraps to the correct 32-bit GID
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# (a flip-flagged GID like 0x80000001 lands as the matching negative i32).
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function tiled_csv_list(text: pointer) -> Val {
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let out = value_list()
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let n = len(text)
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var i = 0
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var cur = 0
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var have = 0
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while i < n {
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let c = text[i]
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if c >= 48 and c <= 57 { cur = cur * 10 + (c - 48); have = 1 }
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else {
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if c == 44 or c == 32 or c == 9 or c == 10 or c == 13 {
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if have == 1 { push(out.kids, value_int(cur)); cur = 0; have = 0 }
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}
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}
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i = i + 1
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}
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if have == 1 { push(out.kids, value_int(cur)) }
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return out
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}
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# a base64 (optionally zlib/gzip-compressed) blob of `count` little-endian u32
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# GIDs -> a Value list of int nodes.
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function tiled_b64_list(text: pointer, compression: pointer, count: int) -> Val {
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let comp = bytes(len(text) + 4)
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let clen = b64_decode(text, comp)
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let outcap = count * 4 + 16
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var raw = comp
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var rawlen = clen
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if compression == "zlib" {
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let d = bytes(outcap); let dn = z_uncompress(comp, clen, d, outcap); raw = d; rawlen = dn
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} else { if compression == "gzip" {
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let d = bytes(outcap); let dn = z_gunzip(comp, clen, d, outcap); raw = d; rawlen = dn
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} }
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let out = value_list()
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var i = 0
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while i + 3 < rawlen {
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let g = raw[i] | (raw[i + 1] << 8) | (raw[i + 2] << 16) | (raw[i + 3] << 24)
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push(out.kids, value_int(g))
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i = i + 4
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}
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return out
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}
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# decode a `<data>` element (child of a `<layer>`) into a Value list of GIDs.
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function tiled_data_list(data: Xml, count: int) -> Val {
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let enc = xml_attr(data, "encoding")
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let comp = xml_attr(data, "compression")
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if enc == "base64" { return tiled_b64_list(xml_text(data), comp, count) }
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# csv (or the legacy tag-per-tile form we don't emit) -> split the text
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return tiled_csv_list(xml_text(data))
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}
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# ---- custom properties -----------------------------------------------------
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# `<properties>` -> a Value list of {name, type, value} objects (P4 reads these;
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# P2 reads the `solid`/`oneway`/`trigger` bool convention off the same list).
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function tmx_props_list(parent: Xml) -> Val {
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let out = value_list()
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let props = xml_find(parent, "properties")
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if xml_tag(props) != "properties" { return out }
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var i = 0
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while i < xml_child_count(props) {
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let p = xml_child(props, i)
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if xml_tag(p) == "property" {
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let o = value_object()
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value_put(o, "name", value_str(xml_attr(p, "name")))
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var ty = xml_attr(p, "type")
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if ty == "" { ty = "string" }
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value_put(o, "type", value_str(ty))
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# value may be an attribute or (for multiline) the element text
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var v = xml_attr(p, "value")
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if xml_has(p, "value") == 0 { v = xml_text(p) }
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value_put(o, "value", value_str(v))
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push(out.kids, o)
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}
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i = i + 1
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}
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return out
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}
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# ---- objects (shapes) ------------------------------------------------------
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# one `<object>` -> a Value object mirroring Tiled's JSON object shape.
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function tmx_object_to_value(ob: Xml) -> Val {
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let o = value_object()
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value_put(o, "id", value_int(xml_attr_int(ob, "id", 0)))
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if xml_has(ob, "name") == 1 { value_put(o, "name", value_str(xml_attr(ob, "name"))) }
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if xml_has(ob, "type") == 1 { value_put(o, "type", value_str(xml_attr(ob, "type"))) }
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if xml_has(ob, "class") == 1 { value_put(o, "type", value_str(xml_attr(ob, "class"))) }
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value_put(o, "x", value_int(xml_attr_int(ob, "x", 0)))
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value_put(o, "y", value_int(xml_attr_int(ob, "y", 0)))
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value_put(o, "width", value_int(xml_attr_int(ob, "width", 0)))
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value_put(o, "height", value_int(xml_attr_int(ob, "height", 0)))
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if xml_has(ob, "gid") == 1 { value_put(o, "gid", value_int(xml_attr_int(ob, "gid", 0))) }
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if xml_has(ob, "rotation") == 1 { value_put(o, "rotation", value_int(xml_attr_int(ob, "rotation", 0))) }
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# shape markers: ellipse / point / polygon / polyline / text
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let el = xml_find(ob, "ellipse"); if xml_tag(el) == "ellipse" { value_put(o, "ellipse", value_bool(1)) }
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let pt = xml_find(ob, "point"); if xml_tag(pt) == "point" { value_put(o, "point", value_bool(1)) }
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let pg = xml_find(ob, "polygon")
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if xml_tag(pg) == "polygon" { value_put(o, "polygon", tmx_points_list(xml_attr(pg, "points"))) }
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let pl = xml_find(ob, "polyline")
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if xml_tag(pl) == "polyline" { value_put(o, "polyline", tmx_points_list(xml_attr(pl, "points"))) }
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let tx = xml_find(ob, "text")
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if xml_tag(tx) == "text" {
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let t = value_object()
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value_put(t, "text", value_str(xml_text(tx)))
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if xml_has(tx, "pixelsize") == 1 { value_put(t, "pixelsize", value_int(xml_attr_int(tx, "pixelsize", 16))) }
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if xml_has(tx, "bold") == 1 { value_put(t, "bold", value_bool(1)) }
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if xml_has(tx, "italic") == 1 { value_put(t, "italic", value_bool(1)) }
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if xml_has(tx, "halign") == 1 { value_put(t, "halign", value_str(xml_attr(tx, "halign"))) }
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if xml_has(tx, "valign") == 1 { value_put(t, "valign", value_str(xml_attr(tx, "valign"))) }
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value_put(o, "text", t)
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}
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let props = tmx_props_list(ob)
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if len(props.kids) > 0 { value_put(o, "properties", props) }
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return o
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}
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# "x,y x,y ..." -> a Value list of {x,y} objects.
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function tmx_points_list(s: pointer) -> Val {
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let out = value_list()
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let n = len(s)
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var i = 0
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while i < n {
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while i < n and (s[i] == 32 or s[i] == 9) { i = i + 1 }
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if i >= n { break }
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# read "x,y"
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var xv = 0; var xn = 0; var xs = 0
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if s[i] == 45 { xs = 1; i = i + 1 }
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while i < n and s[i] >= 48 and s[i] <= 57 { xv = xv * 10 + (s[i] - 48); xn = 1; i = i + 1 }
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if xs == 1 { xv = 0 - xv }
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if i < n and s[i] == 44 { i = i + 1 }
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var yv = 0; var ys = 0
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if i < n and s[i] == 45 { ys = 1; i = i + 1 }
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while i < n and s[i] >= 48 and s[i] <= 57 { yv = yv * 10 + (s[i] - 48); i = i + 1 }
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if ys == 1 { yv = 0 - yv }
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if xn == 1 {
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let o = value_object()
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value_put(o, "x", value_int(xv))
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value_put(o, "y", value_int(yv))
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push(out.kids, o)
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}
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}
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return out
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}
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# ---- tilesets --------------------------------------------------------------
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# one `<tile id=..>` inside a tileset -> a Value object with its metadata:
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# animation frames, per-tile collision objectgroup, class/type, properties.
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function tmx_tile_to_value(t: Xml) -> Val {
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let o = value_object()
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value_put(o, "id", value_int(xml_attr_int(t, "id", 0)))
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if xml_has(t, "type") == 1 { value_put(o, "type", value_str(xml_attr(t, "type"))) }
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if xml_has(t, "class") == 1 { value_put(o, "type", value_str(xml_attr(t, "class"))) }
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if xml_has(t, "probability") == 1 { value_put(o, "probability", value_str(xml_attr(t, "probability"))) }
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# per-tile image (image-collection tilesets)
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let img = xml_find(t, "image")
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if xml_tag(img) == "image" {
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value_put(o, "image", value_str(xml_attr(img, "source")))
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value_put(o, "imagewidth", value_int(xml_attr_int(img, "width", 0)))
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value_put(o, "imageheight", value_int(xml_attr_int(img, "height", 0)))
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}
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# animation frames
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let anim = xml_find(t, "animation")
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if xml_tag(anim) == "animation" {
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let frames = value_list()
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var i = 0
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while i < xml_child_count(anim) {
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let fr = xml_child(anim, i)
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if xml_tag(fr) == "frame" {
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let f = value_object()
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value_put(f, "tileid", value_int(xml_attr_int(fr, "tileid", 0)))
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value_put(f, "duration", value_int(xml_attr_int(fr, "duration", 0)))
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push(frames.kids, f)
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}
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i = i + 1
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}
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value_put(o, "animation", frames)
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}
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# per-tile collision shapes
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let og = xml_find(t, "objectgroup")
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if xml_tag(og) == "objectgroup" {
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let objs = value_list()
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var j = 0
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while j < xml_child_count(og) {
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let ch = xml_child(og, j)
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if xml_tag(ch) == "object" { push(objs.kids, tmx_object_to_value(ch)) }
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j = j + 1
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}
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let ogo = value_object()
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value_put(ogo, "objects", objs)
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value_put(o, "objectgroup", ogo)
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}
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let props = tmx_props_list(t)
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if len(props.kids) > 0 { value_put(o, "properties", props) }
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return o
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}
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# fill the geometry + tiles of a `<tileset>` element into `o` (shared by an
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# embedded tileset and a standalone `.tsx` root).
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function tmx_fill_tileset(o: Val, ts: Xml) -> void {
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if xml_has(ts, "name") == 1 { value_put(o, "name", value_str(xml_attr(ts, "name"))) }
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value_put(o, "tilewidth", value_int(xml_attr_int(ts, "tilewidth", 0)))
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value_put(o, "tileheight", value_int(xml_attr_int(ts, "tileheight", 0)))
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value_put(o, "spacing", value_int(xml_attr_int(ts, "spacing", 0)))
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value_put(o, "margin", value_int(xml_attr_int(ts, "margin", 0)))
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value_put(o, "columns", value_int(xml_attr_int(ts, "columns", 0)))
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value_put(o, "tilecount", value_int(xml_attr_int(ts, "tilecount", 0)))
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let img = xml_find(ts, "image")
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if xml_tag(img) == "image" {
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value_put(o, "image", value_str(xml_attr(img, "source")))
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value_put(o, "imagewidth", value_int(xml_attr_int(img, "width", 0)))
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value_put(o, "imageheight", value_int(xml_attr_int(img, "height", 0)))
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}
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let tiles = value_list()
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var i = 0
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while i < xml_child_count(ts) {
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let ch = xml_child(ts, i)
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if xml_tag(ch) == "tile" { push(tiles.kids, tmx_tile_to_value(ch)) }
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i = i + 1
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}
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if len(tiles.kids) > 0 { value_put(o, "tiles", tiles) }
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}
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# a `<tileset>` child of a `<map>` -> a Value object. External (`source=`) keeps
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# the {firstgid, source} reference (as TMJ does); embedded is inlined in full.
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function tmx_tileset_to_value(ts: Xml) -> Val {
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let o = value_object()
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value_put(o, "firstgid", value_int(xml_attr_int(ts, "firstgid", 1)))
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if xml_has(ts, "source") == 1 {
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value_put(o, "source", value_str(xml_attr(ts, "source")))
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return o
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}
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tmx_fill_tileset(o, ts)
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return o
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}
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# a standalone `.tsx` root -> a tileset Value object (no firstgid — that comes
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# from the map's reference).
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function tsx_to_value(root: Xml) -> Val {
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let o = value_object()
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tmx_fill_tileset(o, root)
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return o
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}
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# ---- layers ----------------------------------------------------------------
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function tmx_layer_common(o: Val, el: Xml) -> void {
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value_put(o, "id", value_int(xml_attr_int(el, "id", 0)))
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value_put(o, "name", value_str(xml_attr(el, "name")))
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if xml_has(el, "class") == 1 { value_put(o, "class", value_str(xml_attr(el, "class"))) }
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var vis = 1
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if xml_has(el, "visible") == 1 { vis = xml_attr_int(el, "visible", 1) }
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value_put(o, "visible", value_bool(vis))
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if xml_has(el, "opacity") == 1 { value_put(o, "opacity", value_str(xml_attr(el, "opacity"))) }
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if xml_has(el, "offsetx") == 1 { value_put(o, "offsetx", value_int(xml_attr_int(el, "offsetx", 0))) }
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if xml_has(el, "offsety") == 1 { value_put(o, "offsety", value_int(xml_attr_int(el, "offsety", 0))) }
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if xml_has(el, "parallaxx") == 1 { value_put(o, "parallaxx", value_str(xml_attr(el, "parallaxx"))) }
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if xml_has(el, "parallaxy") == 1 { value_put(o, "parallaxy", value_str(xml_attr(el, "parallaxy"))) }
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if xml_has(el, "tintcolor") == 1 { value_put(o, "tintcolor", value_str(xml_attr(el, "tintcolor"))) }
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let props = tmx_props_list(el)
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if len(props.kids) > 0 { value_put(o, "properties", props) }
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}
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function tmx_tilelayer_to_value(el: Xml, mapw: int, maph: int) -> Val {
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let o = value_object()
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value_put(o, "type", value_str("tilelayer"))
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tmx_layer_common(o, el)
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let w = xml_attr_int(el, "width", mapw)
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let h = xml_attr_int(el, "height", maph)
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value_put(o, "width", value_int(w))
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value_put(o, "height", value_int(h))
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let data = xml_find(el, "data")
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value_put(o, "data", tiled_data_list(data, w * h))
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return o
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}
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function tmx_objectlayer_to_value(el: Xml) -> Val {
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let o = value_object()
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value_put(o, "type", value_str("objectgroup"))
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tmx_layer_common(o, el)
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let objs = value_list()
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var i = 0
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while i < xml_child_count(el) {
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let ch = xml_child(el, i)
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if xml_tag(ch) == "object" { push(objs.kids, tmx_object_to_value(ch)) }
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i = i + 1
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}
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value_put(o, "objects", objs)
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return o
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}
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# ---- map -------------------------------------------------------------------
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# a `<map>` root -> the intermediate map Value tree (Tiled JSON schema).
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function tmx_to_value(root: Xml) -> Val {
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let m = value_object()
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value_put(m, "type", value_str("map"))
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value_put(m, "version", value_str(xml_attr(root, "version")))
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value_put(m, "orientation", value_str(xml_attr(root, "orientation")))
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value_put(m, "renderorder", value_str(xml_attr(root, "renderorder")))
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value_put(m, "width", value_int(xml_attr_int(root, "width", 0)))
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value_put(m, "height", value_int(xml_attr_int(root, "height", 0)))
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value_put(m, "tilewidth", value_int(xml_attr_int(root, "tilewidth", 0)))
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value_put(m, "tileheight", value_int(xml_attr_int(root, "tileheight", 0)))
|
||||
value_put(m, "infinite", value_bool(xml_attr_int(root, "infinite", 0)))
|
||||
if xml_has(root, "backgroundcolor") == 1 { value_put(m, "backgroundcolor", value_str(xml_attr(root, "backgroundcolor"))) }
|
||||
if xml_has(root, "hexsidelength") == 1 { value_put(m, "hexsidelength", value_int(xml_attr_int(root, "hexsidelength", 0))) }
|
||||
if xml_has(root, "staggeraxis") == 1 { value_put(m, "staggeraxis", value_str(xml_attr(root, "staggeraxis"))) }
|
||||
if xml_has(root, "staggerindex") == 1 { value_put(m, "staggerindex", value_str(xml_attr(root, "staggerindex"))) }
|
||||
let mapw = xml_attr_int(root, "width", 0)
|
||||
let maph = xml_attr_int(root, "height", 0)
|
||||
let tilesets = value_list()
|
||||
let layers = value_list()
|
||||
var i = 0
|
||||
while i < xml_child_count(root) {
|
||||
let ch = xml_child(root, i)
|
||||
let tag = xml_tag(ch)
|
||||
if tag == "tileset" { push(tilesets.kids, tmx_tileset_to_value(ch)) }
|
||||
else { if tag == "layer" { push(layers.kids, tmx_tilelayer_to_value(ch, mapw, maph)) }
|
||||
else { if tag == "objectgroup" { push(layers.kids, tmx_objectlayer_to_value(ch)) }
|
||||
else { if tag == "imagelayer" { push(layers.kids, tmx_imagelayer_to_value(ch)) }
|
||||
else { if tag == "group" { push(layers.kids, tmx_group_to_value(ch, mapw, maph)) } } } } }
|
||||
i = i + 1
|
||||
}
|
||||
let props = tmx_props_list(root)
|
||||
if len(props.kids) > 0 { value_put(m, "properties", props) }
|
||||
value_put(m, "tilesets", tilesets)
|
||||
value_put(m, "layers", layers)
|
||||
return m
|
||||
}
|
||||
|
||||
# `<imagelayer>` -> a Value object (P5 renders these).
|
||||
function tmx_imagelayer_to_value(el: Xml) -> Val {
|
||||
let o = value_object()
|
||||
value_put(o, "type", value_str("imagelayer"))
|
||||
tmx_layer_common(o, el)
|
||||
let img = xml_find(el, "image")
|
||||
if xml_tag(img) == "image" { value_put(o, "image", value_str(xml_attr(img, "source"))) }
|
||||
if xml_has(el, "repeatx") == 1 { value_put(o, "repeatx", value_bool(xml_attr_int(el, "repeatx", 0))) }
|
||||
if xml_has(el, "repeaty") == 1 { value_put(o, "repeaty", value_bool(xml_attr_int(el, "repeaty", 0))) }
|
||||
return o
|
||||
}
|
||||
|
||||
# `<group>` -> a Value object carrying its nested layers (P5 renders recursively).
|
||||
function tmx_group_to_value(el: Xml, mapw: int, maph: int) -> Val {
|
||||
let o = value_object()
|
||||
value_put(o, "type", value_str("group"))
|
||||
tmx_layer_common(o, el)
|
||||
let layers = value_list()
|
||||
var i = 0
|
||||
while i < xml_child_count(el) {
|
||||
let ch = xml_child(el, i)
|
||||
let tag = xml_tag(ch)
|
||||
if tag == "layer" { push(layers.kids, tmx_tilelayer_to_value(ch, mapw, maph)) }
|
||||
else { if tag == "objectgroup" { push(layers.kids, tmx_objectlayer_to_value(ch)) }
|
||||
else { if tag == "imagelayer" { push(layers.kids, tmx_imagelayer_to_value(ch)) }
|
||||
else { if tag == "group" { push(layers.kids, tmx_group_to_value(ch, mapw, maph)) } } } }
|
||||
i = i + 1
|
||||
}
|
||||
value_put(o, "layers", layers)
|
||||
return o
|
||||
}
|
||||
|
||||
# ---- JSON (TMJ) normalisation ----------------------------------------------
|
||||
# The JSON reader already yields a Value tree; normalise it so it matches the XML
|
||||
# path: decode any base64 `data` string into a dense GID int list, in place, for
|
||||
# every tile layer (recursing into groups).
|
||||
function tmj_normalize_layer(layer: Val) -> void {
|
||||
if value_kind(layer) != 6 { return }
|
||||
let ty = value_as_str(value_get(layer, "type"))
|
||||
if ty == "group" {
|
||||
let ls = value_get(layer, "layers")
|
||||
var i = 0
|
||||
while i < value_count(ls) { tmj_normalize_layer(value_at(ls, i)); i = i + 1 }
|
||||
return
|
||||
}
|
||||
if ty != "tilelayer" { return }
|
||||
let data = value_get(layer, "data")
|
||||
if value_kind(data) == 4 { # a base64 string
|
||||
let enc = value_as_str(value_get(layer, "encoding"))
|
||||
let comp = value_as_str(value_get(layer, "compression"))
|
||||
let w = value_as_int(value_get(layer, "width"))
|
||||
let h = value_as_int(value_get(layer, "height"))
|
||||
if enc == "base64" { value_put(layer, "data", tiled_b64_list(value_as_str(data), comp, w * h)) }
|
||||
}
|
||||
}
|
||||
|
||||
function tmj_normalize(m: Val) -> Val {
|
||||
let ls = value_get(m, "layers")
|
||||
var i = 0
|
||||
while i < value_count(ls) { tmj_normalize_layer(value_at(ls, i)); i = i + 1 }
|
||||
return m
|
||||
}
|
||||
|
||||
# ---- top-level readers -----------------------------------------------------
|
||||
# skip leading whitespace and return the first non-space byte (0 if none).
|
||||
function tiled_first_byte(s: pointer) -> int {
|
||||
var i = 0
|
||||
let n = len(s)
|
||||
while i < n {
|
||||
let c = s[i]
|
||||
if c == 32 or c == 9 or c == 10 or c == 13 { i = i + 1 } else { return c }
|
||||
}
|
||||
return 0
|
||||
}
|
||||
|
||||
# read a map file (TMX or TMJ, auto-detected by first byte) -> the normalised
|
||||
# intermediate map Value tree.
|
||||
function tiled_read(path: pointer) -> Val {
|
||||
let text = Fs.read_text(path)
|
||||
if text == null { return value_null() }
|
||||
if text == "" { return value_null() }
|
||||
if tiled_first_byte(text) == 60 { # '<' -> XML
|
||||
return tmx_to_value(xml_parse(text))
|
||||
}
|
||||
return tmj_normalize(json_parse(text)) # '{' -> JSON
|
||||
}
|
||||
|
||||
# read a tileset file (TSX or TSJ) -> a tileset Value object.
|
||||
function tiled_read_tsx(path: pointer) -> Val {
|
||||
let text = Fs.read_text(path)
|
||||
if text == null { return value_null() }
|
||||
if text == "" { return value_null() }
|
||||
if tiled_first_byte(text) == 60 { return tsx_to_value(xml_parse(text)) }
|
||||
return json_parse(text)
|
||||
}
|
||||
Loading…
Add table
Add a link
Reference in a new issue