Merge pull request #8191 from sebavan/master

KHR_xmp

dist/preview release/what's new.md

@@ -79,6 +79,7 @@
 - Renamed KHR_mesh_instancing extension to EXT_mesh_gpu_instancing ([#7945](https://github.com/BabylonJS/Babylon.js/issues/7945)) ([drigax](https://github.com/Drigax))
 - Added support for KHR_materials_ior for glTF loader. ([Sebavan](https://github.com/sebavan/))
 - Added support for KHR_materials_specular for glTF loader. ([Sebavan](https://github.com/sebavan/))
+- Added support for KHR_xmp for glTF loader. ([Sebavan](https://github.com/sebavan/))
 
 ### Navigation
 

loaders/src/glTF/2.0/Extensions/KHR_xmp.ts

@@ -0,0 +1,67 @@
+import { IGLTFLoaderExtension } from "../glTFLoaderExtension";
+import { GLTFLoader } from "../glTFLoader";
+
+const NAME = "KHR_xmp";
+
+interface IKHR_xmp_data {
+    [key: string]: unknown;
+}
+
+interface IKHR_xmp_gltf {
+    packets: IKHR_xmp_data[];
+}
+
+interface IKHR_xmp_node {
+    packet: number;
+}
+
+/**
+ * [Proposed Specification](https://github.com/KhronosGroup/glTF/pull/1553)
+ * !!! Experimental Extension Subject to Changes !!!
+ */
+export class KHR_xmp implements IGLTFLoaderExtension {
+    /**
+     * The name of this extension.
+     */
+    public readonly name = NAME;
+
+    /**
+     * Defines whether this extension is enabled.
+     */
+    public enabled: boolean;
+
+    /**
+     * Defines a number that determines the order the extensions are applied.
+     */
+    public order = 100;
+
+    private _loader: GLTFLoader;
+
+    /** @hidden */
+    constructor(loader: GLTFLoader) {
+        this._loader = loader;
+        this.enabled = this._loader.isExtensionUsed(NAME);
+    }
+
+    /** @hidden */
+    public dispose() {
+        delete this._loader;
+    }
+
+    /**
+     * Called after the loader state changes to LOADING.
+     */
+    public onLoading(): void {
+        const xmp_gltf = (this._loader.gltf.extensions?.KHR_xmp as IKHR_xmp_gltf);
+        const xmp_node = (this._loader.gltf.asset?.extensions?.KHR_xmp as IKHR_xmp_node);
+        if (xmp_gltf && xmp_node) {
+            const packet = +xmp_node.packet;
+            if (xmp_gltf.packets && packet < xmp_gltf.packets.length) {
+                this._loader.rootBabylonMesh.metadata = this._loader.rootBabylonMesh.metadata || { };
+                this._loader.rootBabylonMesh.metadata.xmp = xmp_gltf.packets[packet];
+            }
+        }
+    }
+}
+
+GLTFLoader.RegisterExtension(NAME, (loader) => new KHR_xmp(loader));

loaders/src/glTF/2.0/Extensions/index.ts

@@ -11,6 +11,7 @@ export * from "./KHR_materials_ior";
 export * from "./KHR_mesh_quantization";
 export * from "./KHR_texture_basisu";
 export * from "./KHR_texture_transform";
+export * from "./KHR_xmp";
 export * from "./MSFT_audio_emitter";
 export * from "./MSFT_lod";
 export * from "./MSFT_minecraftMesh";