Add shared-scene 2D authoring, sprite animation and Rapier2D physics

2026-09-12 04:58:59 +03:00
parent 6f497d1977
commit 3afac743a4
32 changed files with 4999 additions and 270 deletions
@@ -0,0 +1,84 @@
+import { base64 } from "./archive.ts";
+import { uid, type Asset } from "./schema.ts";
+import { sliceImage } from "./two-d.ts";
+/** Read image dimensions without DOM, so browser and MCP import share validation. */
+export function imageInfo(bytes: Uint8Array) {
+  if (bytes.length > 25 * 1024 * 1024)
+    throw Error("Изображение превышает 25 МБ");
+  const d = new DataView(bytes.buffer, bytes.byteOffset, bytes.byteLength);
+  let width = 0,
+    height = 0,
+    mime = "",
+    ext = "";
+  if (
+    bytes.length >= 24 &&
+    d.getUint32(0) === 0x89504e47 &&
+    d.getUint32(4) === 0x0d0a1a0a
+  ) {
+    width = d.getUint32(16);
+    height = d.getUint32(20);
+    mime = "image/png";
+    ext = "png";
+  } else if (
+    bytes.length >= 30 &&
+    d.getUint32(0) === 0x52494646 &&
+    d.getUint32(8) === 0x57454250
+  ) {
+    const kind = d.getUint32(12);
+    if (kind === 0x56503858) {
+      width = 1 + bytes[24] + bytes[25] * 256 + bytes[26] * 65536;
+      height = 1 + bytes[27] + bytes[28] * 256 + bytes[29] * 65536;
+    } else if (kind === 0x5650384c && bytes[20] === 0x2f) {
+      const bits = d.getUint32(21, true);
+      width = (bits & 0x3fff) + 1;
+      height = ((bits >>> 14) & 0x3fff) + 1;
+    } else if (
+      kind === 0x56503820 &&
+      bytes[23] === 0x9d &&
+      bytes[24] === 1 &&
+      bytes[25] === 0x2a
+    ) {
+      width = d.getUint16(26, true) & 0x3fff;
+      height = d.getUint16(28, true) & 0x3fff;
+    }
+    mime = "image/webp";
+    ext = "webp";
+  } else if (bytes.length > 4 && d.getUint16(0) === 0xffd8) {
+    let offset = 2;
+    while (offset + 4 <= bytes.length) {
+      if (bytes[offset++] !== 255) break;
+      while (bytes[offset] === 255) offset++;
+      const marker = bytes[offset++];
+      if (marker === 0xda || marker === 0xd9) break;
+      const length = d.getUint16(offset);
+      if (length < 2 || offset + length > bytes.length) break;
+      if ([0xc0, 0xc1, 0xc2].includes(marker) && length >= 7) {
+        height = d.getUint16(offset + 3);
+        width = d.getUint16(offset + 5);
+        break;
+      }
+      offset += length;
+    }
+    mime = "image/jpeg";
+    ext = "jpg";
+  }
+  if (!width || !height || width > 16384 || height > 16384)
+    throw Error("Ожидалось PNG, JPEG или WebP размером до 16384×16384");
+  return { width, height, mime, ext };
+}
+export function imageAsset(bytes: Uint8Array, name: string): Asset {
+  const info = imageInfo(bytes);
+  return {
+    id: uid("image"),
+    name: name.replace(/\.[^.]+$/, "") + "." + info.ext,
+    kind: "image",
+    uri: `data:${info.mime};base64,${base64(bytes)}`,
+    image: {
+      width: info.width,
+      height: info.height,
+      pixelsPerUnit: 100,
+      filter: "nearest",
+      frames: sliceImage(info.width, info.height, info.width, info.height),
+    },
+  };
+}