Orkuncakilkaya
bc301c8d17
The heart of Tiled support: load a map and draw it.
- rt_tmap model (Tmap/TmLayer/TmTileset in tiled.ludic): map header + ordered
layers (dense int32 GID arrays, heap-allocated to w*h, lifting the 96x64 cap)
+ tilesets. Built from the intermediate Value tree, so the TMX and TMJ paths
both feed it.
- GID resolver (Tiled.resolve): gid -> (tileset, localId, flipH/V/D); the three
flip flags masked off before the local-id lookup, returned alongside. gid==0
is empty.
- Image-backed render (Tiled.draw): every visible tile layer in file order,
blitting each tile from its tileset image with flips applied at draw.
- Compatibility projection (Tiled.project / auto on load): a designated
collision layer projects to the legacy byte tilemap ('#' solid, '=' one-way
via the oneway property, ' ' empty) so Grid.*/Path.*/esys_move are unchanged.
- Tiled.load resolves external tilesets + images relative to the map file and
auto-projects a collision/solids/walls layer.
- The grid and physics_tiles demos now run off a loaded map (grid_maze.tmx /
physics_map.tmx) instead of hand-authored Map.row strings, byte-identically.
Two compiler fixes fell out of this (see the changeset):
- emit_index_addr set g_addr_ty before evaluating the index, so slice[obj.field]
came back mis-typed; set it last, like the raw-pointer branches.
- @strcmp was declared by both the world table and the fs prelude; centralise
it in the head prelude so a game that uses Fs/Path links.
Proven by library/tiled_p1.ludic (14 assertions: loads+renders Kenney map
identically from .tmx and .tmj, flip mirroring) + the converted grid/
physics_tiles demos. x test: 92 passed; self-host bootstrap fixpoint intact.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
790 lines
31 KiB
Text
790 lines
31 KiB
Text
# ============================================================================
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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)))
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value_put(m, "infinite", value_bool(xml_attr_int(root, "infinite", 0)))
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if xml_has(root, "backgroundcolor") == 1 { value_put(m, "backgroundcolor", value_str(xml_attr(root, "backgroundcolor"))) }
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if xml_has(root, "hexsidelength") == 1 { value_put(m, "hexsidelength", value_int(xml_attr_int(root, "hexsidelength", 0))) }
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if xml_has(root, "staggeraxis") == 1 { value_put(m, "staggeraxis", value_str(xml_attr(root, "staggeraxis"))) }
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if xml_has(root, "staggerindex") == 1 { value_put(m, "staggerindex", value_str(xml_attr(root, "staggerindex"))) }
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let mapw = xml_attr_int(root, "width", 0)
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let maph = xml_attr_int(root, "height", 0)
|
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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)
|
||
}
|
||
|
||
# ============================================================================
|
||
# P1 (#69) — the runtime map model (`rt_tmap`), the GID resolver, the legacy
|
||
# `rt_map` compatibility projection, and image-backed rendering. Built from the
|
||
# intermediate Value tree above, so both the TMX and TMJ paths feed it.
|
||
# ============================================================================
|
||
|
||
property TmTileset {
|
||
firstgid: int = 0
|
||
columns: int = 0
|
||
tilew: int = 0
|
||
tileh: int = 0
|
||
spacing: int = 0
|
||
margin: int = 0
|
||
tilecount: int = 0
|
||
imgid: int = 0 - 1 # loaded image handle (rt_image_load), -1 = none
|
||
meta: Val # the tileset Value object (per-tile metadata)
|
||
}
|
||
|
||
property TmLayer {
|
||
kind: int = 0 # 0 tilelayer, 1 objectgroup, 2 imagelayer, 3 group
|
||
name: pointer = null
|
||
w: int = 0
|
||
h: int = 0
|
||
visible: int = 1
|
||
gids: []int # dense w*h GID array (tilelayer only)
|
||
data: Val # the layer Value object (objects, image, …)
|
||
}
|
||
|
||
property Tmap {
|
||
w: int = 0 # map width in tiles
|
||
h: int = 0
|
||
tilew: int = 0 # map tile size in pixels
|
||
tileh: int = 0
|
||
orientation: pointer = null
|
||
layers: []TmLayer
|
||
tilesets: []TmTileset
|
||
tree: Val # the source intermediate tree
|
||
coll: int = 0 - 1 # designated collision layer index, or -1
|
||
}
|
||
|
||
# ---- GID resolver ----------------------------------------------------------
|
||
property GidInfo {
|
||
tileset: int = 0 - 1 # index into Tmap.tilesets (-1 = none/empty)
|
||
local: int = 0 # local tile id within that tileset
|
||
fh: int = 0 # horizontal flip
|
||
fv: int = 0 # vertical flip
|
||
fd: int = 0 # anti-diagonal flip
|
||
empty: int = 0 # gid was 0
|
||
}
|
||
|
||
# decompose a raw GID: strip the three flip flags (0x80000000 H, 0x40000000 V,
|
||
# 0x20000000 D), keep the low 29 bits as the global tile id, and find the tileset
|
||
# whose firstgid is the greatest not exceeding it. gid == 0 is the empty cell.
|
||
function tmap_resolve(m: Tmap, gid: int) -> GidInfo {
|
||
let r = new GidInfo
|
||
if gid == 0 { r.empty = 1; r.tileset = 0 - 1; return r }
|
||
let H = 1 << 31
|
||
let V = 1 << 30
|
||
let D = 1 << 29
|
||
if (gid & H) != 0 { r.fh = 1 }
|
||
if (gid & V) != 0 { r.fv = 1 }
|
||
if (gid & D) != 0 { r.fd = 1 }
|
||
let id = gid & 536870911 # low 29 bits = global tile id
|
||
var best = 0 - 1
|
||
var bestfg = 0
|
||
var i = 0
|
||
while i < len(m.tilesets) {
|
||
let fg = m.tilesets[i].firstgid
|
||
if fg <= id and fg >= bestfg { bestfg = fg; best = i }
|
||
i = i + 1
|
||
}
|
||
r.tileset = best
|
||
if best >= 0 { r.local = id - m.tilesets[best].firstgid }
|
||
return r
|
||
}
|
||
|
||
# ---- accessors -------------------------------------------------------------
|
||
function tmap_width(m: Tmap) -> int { return m.w }
|
||
function tmap_height(m: Tmap) -> int { return m.h }
|
||
function tmap_layer_count(m: Tmap) -> int { return len(m.layers) }
|
||
function tmap_layer_name(m: Tmap, i: int) -> pointer {
|
||
if i < 0 or i >= len(m.layers) { return "" }
|
||
if m.layers[i].name == null { return "" }
|
||
return m.layers[i].name
|
||
}
|
||
function tmap_tree(m: Tmap) -> Val { return m.tree }
|
||
|
||
# raw GID at (x,y) in tile layer `layer` (0 out of bounds / non-tile layer).
|
||
function tmap_gid(m: Tmap, layer: int, x: int, y: int) -> int {
|
||
if layer < 0 or layer >= len(m.layers) { return 0 }
|
||
let l = m.layers[layer]
|
||
if l.kind != 0 { return 0 }
|
||
if x < 0 or y < 0 or x >= l.w or y >= l.h { return 0 }
|
||
return l.gids[y * l.w + x]
|
||
}
|
||
|
||
# ---- per-tile metadata (property convention) -------------------------------
|
||
# does the tile a GID resolves to carry bool custom property `name` = true?
|
||
function tmap_tile_prop(m: Tmap, gid: int, name: pointer) -> int {
|
||
let r = tmap_resolve(m, gid)
|
||
if r.tileset < 0 { return 0 }
|
||
let ts = m.tilesets[r.tileset]
|
||
if value_kind(ts.meta) != 6 { return 0 }
|
||
let tiles = value_get(ts.meta, "tiles")
|
||
if value_kind(tiles) != 5 { return 0 }
|
||
var i = 0
|
||
while i < value_count(tiles) {
|
||
let t = value_at(tiles, i)
|
||
if value_as_int(value_get(t, "id")) == r.local {
|
||
let props = value_get(t, "properties")
|
||
if value_kind(props) == 5 {
|
||
var j = 0
|
||
while j < value_count(props) {
|
||
let p = value_at(props, j)
|
||
if value_as_str(value_get(p, "name")) == name {
|
||
if value_as_str(value_get(p, "value")) == "true" { return 1 }
|
||
return 0
|
||
}
|
||
j = j + 1
|
||
}
|
||
}
|
||
return 0
|
||
}
|
||
i = i + 1
|
||
}
|
||
return 0
|
||
}
|
||
|
||
# ---- legacy rt_map compatibility projection --------------------------------
|
||
# project the designated collision layer down to the byte tilemap so Grid.* /
|
||
# Path.* / esys_move keep working unchanged: an empty cell is ' ' (passable), a
|
||
# tile whose GID carries the `oneway` property is '=' (61), any other non-zero
|
||
# GID is '#' (35, solid). The legacy 96x64 cap clips, so old code is byte-exact.
|
||
function tmap_project(m: Tmap, layer: int) -> void {
|
||
m.coll = layer
|
||
rt_map_size(m.w, m.h) # clamps to 96x64, clears to ' '
|
||
if layer < 0 or layer >= len(m.layers) { return }
|
||
let l = m.layers[layer]
|
||
if l.kind != 0 { return }
|
||
var y = 0
|
||
while y < l.h {
|
||
if y < 64 {
|
||
var x = 0
|
||
while x < l.w {
|
||
if x < 96 {
|
||
let gid = l.gids[y * l.w + x]
|
||
if gid != 0 {
|
||
var ch = 35 # '#'
|
||
if tmap_tile_prop(m, gid, "oneway") == 1 { ch = 61 } # '='
|
||
rt_map[y * 96 + x] = ch
|
||
}
|
||
}
|
||
x = x + 1
|
||
}
|
||
}
|
||
y = y + 1
|
||
}
|
||
}
|
||
|
||
# find a tile layer named collision/solids/walls (case-sensitive), or -1.
|
||
function tmap_find_collision(m: Tmap) -> int {
|
||
var i = 0
|
||
while i < len(m.layers) {
|
||
let n = m.layers[i].name
|
||
if m.layers[i].kind == 0 and (n == "collision" or n == "solids" or n == "walls" or n == "Collision" or n == "Solids") { return i }
|
||
i = i + 1
|
||
}
|
||
return 0 - 1
|
||
}
|
||
|
||
# ---- rendering -------------------------------------------------------------
|
||
# blit one tilew x tileh tile from a tileset image (source origin sx,sy) to the
|
||
# framebuffer at (dx,dy), applying the three flip flags. Square tiles assumed
|
||
# for the diagonal flip (Kenney art is 16x16), which is the orthogonal case.
|
||
function tmap_blit_tile(imgid: int, sx: int, sy: int, tw: int, th: int, dx: int, dy: int, fh: int, fv: int, fd: int) -> void {
|
||
if imgid < 0 { return }
|
||
let s: words = img_px[imgid]
|
||
let iw = img_w[imgid]
|
||
var j = 0
|
||
while j < th {
|
||
var i = 0
|
||
while i < tw {
|
||
var u = i
|
||
var v = j
|
||
if fd == 1 { u = j; v = i }
|
||
if fh == 1 { u = tw - 1 - u }
|
||
if fv == 1 { v = th - 1 - v }
|
||
let argb = s[(sy + v) * iw + (sx + u)]
|
||
rt_blend_px(dx + i, dy + j, argb)
|
||
i = i + 1
|
||
}
|
||
j = j + 1
|
||
}
|
||
}
|
||
|
||
# draw one tile GID at map cell (x,y) with the camera offset already applied.
|
||
function tmap_draw_gid(m: Tmap, gid: int, dx: int, dy: int) -> void {
|
||
if gid == 0 { return }
|
||
let r = tmap_resolve(m, gid)
|
||
if r.tileset < 0 { return }
|
||
let ts = m.tilesets[r.tileset]
|
||
if ts.imgid < 0 { return }
|
||
let cols = ts.columns
|
||
if cols <= 0 { return }
|
||
let cx = r.local - (r.local / cols) * cols
|
||
let cy = r.local / cols
|
||
let sx = ts.margin + cx * (ts.tilew + ts.spacing)
|
||
let sy = ts.margin + cy * (ts.tileh + ts.spacing)
|
||
# Tiled anchors a tile by its bottom-left, so a tile taller than the map cell
|
||
# rises above the cell.
|
||
let ddy = dy - (ts.tileh - m.tileh)
|
||
tmap_blit_tile(ts.imgid, sx, sy, ts.tilew, ts.tileh, dx, ddy, r.fh, r.fv, r.fd)
|
||
}
|
||
|
||
# draw every visible tile layer in file order, offset by the camera (camx,camy).
|
||
function tmap_draw(m: Tmap, camx: int, camy: int) -> void {
|
||
var li = 0
|
||
while li < len(m.layers) {
|
||
let l = m.layers[li]
|
||
if l.kind == 0 and l.visible != 0 {
|
||
var y = 0
|
||
while y < l.h {
|
||
var x = 0
|
||
while x < l.w {
|
||
let gid = l.gids[y * l.w + x]
|
||
if gid != 0 {
|
||
tmap_draw_gid(m, gid, x * m.tilew - camx, y * m.tileh - camy)
|
||
}
|
||
x = x + 1
|
||
}
|
||
y = y + 1
|
||
}
|
||
}
|
||
li = li + 1
|
||
}
|
||
}
|
||
|
||
# ---- build the model from the intermediate Value tree ----------------------
|
||
function tmap_gids_from_layer(lv: Val) -> []int {
|
||
let out = new []int
|
||
let data = value_get(lv, "data")
|
||
var i = 0
|
||
while i < value_count(data) { push(out, value_as_int(value_at(data, i))); i = i + 1 }
|
||
return out
|
||
}
|
||
|
||
# fill a TmTileset's geometry from a tileset Value object (its per-tile metadata
|
||
# stays in `.meta` for the resolver / property convention).
|
||
function tmap_tileset_from_value(tv: Val) -> TmTileset {
|
||
let ts = new TmTileset
|
||
ts.firstgid = value_as_int(value_get(tv, "firstgid"))
|
||
ts.tilew = value_as_int(value_get(tv, "tilewidth"))
|
||
ts.tileh = value_as_int(value_get(tv, "tileheight"))
|
||
ts.spacing = value_as_int(value_get(tv, "spacing"))
|
||
ts.margin = value_as_int(value_get(tv, "margin"))
|
||
ts.tilecount = value_as_int(value_get(tv, "tilecount"))
|
||
ts.columns = value_as_int(value_get(tv, "columns"))
|
||
if ts.columns <= 0 and ts.tilew > 0 { # derive columns from the image
|
||
let iw = value_as_int(value_get(tv, "imagewidth"))
|
||
if iw > 0 { ts.columns = (iw - 2 * ts.margin + ts.spacing) / (ts.tilew + ts.spacing) }
|
||
}
|
||
ts.meta = tv
|
||
return ts
|
||
}
|
||
|
||
function tiled_join(a: pointer, b: pointer) -> pointer { return Path.normalize(Path.join(a, b)) }
|
||
|
||
# build the runtime map from an intermediate tree, resolving external tilesets
|
||
# and loading tileset images relative to `basedir`.
|
||
function tmap_build(tree: Val, basedir: pointer) -> Tmap {
|
||
let m = new Tmap
|
||
m.tree = tree
|
||
m.layers = new []TmLayer
|
||
m.tilesets = new []TmTileset
|
||
m.orientation = value_as_str(value_get(tree, "orientation"))
|
||
m.w = value_as_int(value_get(tree, "width"))
|
||
m.h = value_as_int(value_get(tree, "height"))
|
||
m.tilew = value_as_int(value_get(tree, "tilewidth"))
|
||
m.tileh = value_as_int(value_get(tree, "tileheight"))
|
||
# tilesets
|
||
let tss = value_get(tree, "tilesets")
|
||
var i = 0
|
||
while i < value_count(tss) {
|
||
var tv = value_at(tss, i)
|
||
var imgdir = basedir
|
||
let src = value_as_str(value_get(tv, "source"))
|
||
if src != "" { # external .tsx/.tsj
|
||
let tsxpath = tiled_join(basedir, src)
|
||
let ext = tiled_read_tsx(tsxpath)
|
||
value_put(ext, "firstgid", value_get(tv, "firstgid"))
|
||
tv = ext
|
||
imgdir = Path.dir(tsxpath)
|
||
}
|
||
let ts = tmap_tileset_from_value(tv)
|
||
let img = value_as_str(value_get(tv, "image"))
|
||
if img != "" { ts.imgid = rt_image_load(tiled_join(imgdir, img)) }
|
||
push(m.tilesets, ts)
|
||
i = i + 1
|
||
}
|
||
# layers (flat; groups' children are lifted so tile layers render/resolve)
|
||
let ls = value_get(tree, "layers")
|
||
i = 0
|
||
while i < value_count(ls) { tmap_add_layer(m, value_at(ls, i)); i = i + 1 }
|
||
return m
|
||
}
|
||
|
||
function tmap_add_layer(m: Tmap, lv: Val) -> void {
|
||
let ty = value_as_str(value_get(lv, "type"))
|
||
let l = new TmLayer
|
||
l.data = lv
|
||
l.name = value_as_str(value_get(lv, "name"))
|
||
var vis = 1
|
||
if value_has(lv, "visible") == 1 { if value_as_int(value_get(lv, "visible")) == 0 { vis = 0 } }
|
||
l.visible = vis
|
||
if ty == "tilelayer" {
|
||
l.kind = 0
|
||
l.w = value_as_int(value_get(lv, "width"))
|
||
l.h = value_as_int(value_get(lv, "height"))
|
||
l.gids = tmap_gids_from_layer(lv)
|
||
push(m.layers, l)
|
||
return
|
||
}
|
||
if ty == "objectgroup" { l.kind = 1; push(m.layers, l); return }
|
||
if ty == "imagelayer" { l.kind = 2; push(m.layers, l); return }
|
||
if ty == "group" {
|
||
l.kind = 3; push(m.layers, l)
|
||
let sub = value_get(lv, "layers")
|
||
var i = 0
|
||
while i < value_count(sub) { tmap_add_layer(m, value_at(sub, i)); i = i + 1 }
|
||
return
|
||
}
|
||
push(m.layers, l)
|
||
}
|
||
|
||
# ---- top-level load --------------------------------------------------------
|
||
# load a Tiled map file into the runtime model: read + parse (TMX or TMJ), build
|
||
# the model (resolving external tilesets + images), and project the collision
|
||
# layer (a tile layer named collision/solids/walls) down to the legacy tilemap.
|
||
function tiled_load(path: pointer) -> Tmap {
|
||
let tree = tiled_read(path)
|
||
let m = tmap_build(tree, Path.dir(path))
|
||
let c = tmap_find_collision(m)
|
||
if c >= 0 { tmap_project(m, c) }
|
||
return m
|
||
}
|