@babylonjs/viewer/dist/chunks/gltf-ext-basisu-CKmouyMn.esm.min.js

The Babylon Viewer aims to simplify a specific but common Babylon.js use case: loading, viewing, and interacting with a 3D model.

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x(e){switch(e){case"rgba8unorm":return"rgba8unorm-srgb";case"bc1-rgba-unorm":return"bc1-rgba-unorm-srgb";case"bc2-rgba-unorm":return"bc2-rgba-unorm-srgb";case"bc3-rgba-unorm":return"bc3-rgba-unorm-srgb";case"bc7-rgba-unorm":return"bc7-rgba-unorm-srgb";case"etc2-rgb8unorm":return"etc2-rgb8unorm-srgb";case"etc2-rgb8a1unorm":return"etc2-rgb8a1unorm-srgb";case"etc2-rgba8unorm":return"etc2-rgba8unorm-srgb";case"astc-4x4-unorm":return"astc-4x4-unorm-srgb";case"astc-5x4-unorm":return"astc-5x4-unorm-srgb";case"astc-5x5-unorm":return"astc-5x5-unorm-srgb";case"astc-6x5-unorm":return"astc-6x5-unorm-srgb";case"astc-6x6-unorm":return"astc-6x6-unorm-srgb";case"astc-8x5-unorm":return"astc-8x5-unorm-srgb";case"astc-8x6-unorm":return"astc-8x6-unorm-srgb";case"astc-8x8-unorm":return"astc-8x8-unorm-srgb";case"astc-10x5-unorm":return"astc-10x5-unorm-srgb";case"astc-10x6-unorm":return"astc-10x6-unorm-srgb";case"astc-10x8-unorm":return"astc-10x8-unorm-srgb";case"astc-10x10-unorm":return"astc-10x10-unorm-srgb";case"astc-12x10-unorm":return"astc-12x10-unorm-srgb";case"astc-12x12-unorm":return"astc-12x12-unorm-srgb";default:return 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n=s[r],o=n.width*n.height*a.bytesPerPixel;n.data.length!==o&&t(408,r,n.data.length,o),e._device.queue.writeTexture({texture:i,mipLevel:r},n.data,{bytesPerRow:n.width*a.bytesPerPixel},{width:n.width,height:n.height})}const l={texture:i,view:i.createView(),sampler:h(e,s.length),width:c,height:u,invertY:!0};return n(l),l}(s,i,b,o);t(409,u.transcodedFormat.toString(16))}async function p(r){const n=await f(),a=d(await n.decode(new e(r),g,{forceRGBA:!0}))[0];a.data.length!==a.width*a.height*4&&t(411);const o=new s(a.data.length);return o.set(a.data),createImageBitmap(new ImageData(o,a.width,a.height))}const T="KHR_texture_basisu",y={5120:1,5121:1,5122:2,5123:2,5125:4,5126:4},v={SCALAR:1,VEC2:2,VEC3:3,VEC4:4,MAT2:4,MAT3:9,MAT4:16},C="__basisuMaterialData";function _(e){const t=e?.extensions?.KHR_texture_basisu?.source;return"number"==typeof t?t:null}function M(e){const t=e?.index;return"number"==typeof t?t:null}function R(e,t,r,n){return!!function(e,t){const r=M(t);return 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r=e.metallicRoughnessTexture,n=e.occlusionTexture,s=M(r),a=M(n);if(null===s&&null===a)return;if(null===s||null===a||s===a)return D(e,t,r??n,!1);e.textures??=new Map;const o=`orm:${s}:${a}`;let c=e.textures.get(o);if(!c){const[s,a]=await Promise.all([k(e,r),k(e,n)]);if(!s||!a)return;c=t._uploadImage(await async function(e,t){const r=e.width,n=e.height,s=new OffscreenCanvas(r,n),a=s.getContext("2d");a.drawImage(e,0,0,r,n);const o=a.getImageData(0,0,r,n),c=new OffscreenCanvas(r,n).getContext("2d");c.drawImage(t,0,0,r,n);const u=c.getImageData(0,0,r,n);for(let e=0;e<o.data.length;e+=4)o.data[e]=u.data[e];return a.putImageData(o,0,0),createImageBitmap(s)}(s,a),!1),e.textures.set(o,c)}return c}function O(e,r,n,s){switch(n){case 5126:return e.getFloat32(r,!0);case 5125:{const t=e.getUint32(r,!0);return s?t/4294967295:t}case 5123:{const t=e.getUint16(r,!0);return s?t/65535:t}case 5122:{const t=e.getInt16(r,!0);return s?Math.max(t/32767,-1):t}case 5121:{const t=e.getUint8(r);return s?t/255:t}case 5120:{const t=e.getInt8(r);return s?Math.max(t/127,-1):t}default:t(82,T,n)}}function I(e,r,n){const s=e.accessors[n],a=e.bufferViews[s.bufferView],o=s.componentType,c=y[o];c||t(83,T,n,o);const l=v[s.type]??1,m=l*c,b=a.byteStride??m;b<m&&t(84,T,b,n);const g=!0===s.normalized,f=r.byteOffset+(a.byteOffset??0)+(s.byteOffset??0),x=new u(r.buffer),d=new i(s.count*l);for(let e=0,t=0;e<s.count;e++){const r=f+e*b;for(let e=0;e<l;e++,t++)d[t]=O(x,r+e*c,o,g)}return d}const E={id:T,async preMesh(e,t,r){const n=e;!function(e,t,r){for(const n of e.materials??[]){const s={json:e,binChunk:t,baseUrl:r},a=n.pbrMetallicRoughness??{};let o=R(e,a,"baseColorTexture",s);o=R(e,a,"metallicRoughnessTexture",s)||o,o=R(e,n,"normalTexture",s)||o,o=R(e,n,"occlusionTexture",s)||o,o=R(e,n,"emissiveTexture",s)||o;const c=n.extensions?.KHR_materials_specular;c&&(o=R(e,c,"specularTexture",s)||o,o=R(e,c,"specularColorTexture",s)||o),o&&Object.defineProperty(n,C,{value:s})}}(n,t,r);const s=new Map;for(const e of n.meshes??[])for(const r of e.primitives??[]){const e=r.attributes??{};if(!Object.keys(e).some(t=>void 0!==n.bufferViews?.[n.accessors?.[e[t]]?.bufferView]?.byteStride))continue;const a=new Map;for(const r of Object.keys(e)){const s=e[r],o=n.accessors[s];void 0!==n.bufferViews?.[o.bufferView]?.byteStride&&a.set(r,I(n,t,s))}const u=n.accessors[e.POSITION],i=void 0===r.indices?new o(0):new o(c(n,t,r.indices)._data);s.set(r,{_attributes:a,_indices:i,_vertexCount:u.count,_indexCount:i.length})}return s},async applyMaterial(e,t){const r=e._rawMatDef?.[C];if(!r)return null;const[n,s,a,o,c,u]=await Promise.all([D(r,t,r.baseColorTexture,!0),F(r,t),D(r,t,r.normalTexture,!1),D(r,t,r.emissiveTexture,!0),D(r,t,r.specularTexture,!1),D(r,t,r.specularColorTexture,!1)]),i={...n?{baseColorTexture:n}:void 0,...s?{ormTexture:s,...r.metallicRoughnessTexture?{metallicFactor:e._metallicFactor,roughnessFactor:e._roughnessFactor}:void 0,...r.occlusionTexture?{occlusionStrength:1,occlusionTexCoord:r.occlusionTexture.texCoord??0}:void 0}:void 0,...a?{normalTexture:a,normalTextureScale:r.normalTexture?.scale??1}:void 0,...o?{emissiveTexture:o}:void 0,...c?{metallicReflectanceTexture:c,useOnlyMetallicFromMetallicReflectanceTexture:!0}:void 0,...u?{reflectanceTexture:u}:void 0};return i.baseColorTexture||i.ormTexture||i.normalTexture||i.emissiveTexture||i.metallicReflectanceTexture||i.reflectanceTexture?i:null}};export{E as default};
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