x_ite/dist/assets/lib/libktx.js

X_ITE X3D Browser and VRML Viewer — View and Manipulate X3D, VRML, glTF and Other 3D Sources in HTML

var LIBKTX,createKtxModule=async function(e={},r){var t=e,n=!!globalThis.WorkerGlobalScope;t.onRuntimeInitialized=function(){t.ktxTexture=t.texture,t.ErrorCode=t.error_code,t.TranscodeTarget=t.transcode_fmt,t.TranscodeFlags=t.transcode_flag_bits};var a,o,i="./this.program",s=(e,r)=>{throw r},u="";try{u=new URL(".",r).href}catch{}n&&(o=e=>{var r=new XMLHttpRequest;return r.open("GET",e,!1),r.responseType="arraybuffer",r.send(null),new Uint8Array(r.response)}),a=async e=>{if(h(e))return new Promise((r,t)=>{var n=new XMLHttpRequest;n.open("GET",e,!0),n.responseType="arraybuffer",n.onload=()=>{200==n.status||0==n.status&&n.response?r(n.response):t(n.status)},n.onerror=t,n.send(null)});var r=await fetch(e,{credentials:"same-origin"});if(r.ok)return r.arrayBuffer();throw new Error(r.status+" : "+r.url)};var f,c,l,d=console.log.bind(console),m=console.error.bind(console),p=!1,h=e=>e.startsWith("file://");class v{}class g extends v{}var y,b,w,E,x,_,k,B,T,P,C,$=!1;function A(){var e=rn.buffer;t.HEAP8=x=new Int8Array(e),b=new Int16Array(e),C=new Uint8Array(e),B=new Uint16Array(e),w=new Int32Array(e),T=new Uint32Array(e),_=new Float32Array(e),k=new Float64Array(e),E=new BigInt64Array(e),P=new BigUint64Array(e)}function S(e){t.onAbort?.(e),m(e=`Aborted(${e})`),p=!0,e+=". 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n,a;if(t=64&(r=(e=>{if("string"!=typeof e)return e;var r={r:0,"r+":2,w:577,"w+":578,a:1089,"a+":1090}[e];if(void 0===r)throw new Error(`Unknown file open mode: ${e}`);return r})(r))?4095&t|32768:0,"object"==typeof e)n=e;else{a=e.endsWith("/");var o=me.lookupPath(e,{follow:!(131072&r),noent_okay:!0});n=o.node,e=o.path}var i=!1;if(64&r)if(n){if(128&r)throw new me.ErrnoError(20)}else{if(a)throw new me.ErrnoError(31);n=me.mknod(e,511|t,0),i=!0}if(!n)throw new me.ErrnoError(44);if(me.isChrdev(n.mode)&&(r&=-513),65536&r&&!me.isDir(n.mode))throw new me.ErrnoError(54);if(!i){var s=me.mayOpen(n,r);if(s)throw new me.ErrnoError(s)}512&r&&!i&&me.truncate(n,0),r&=-131713;var u=me.createStream({node:n,path:me.getPath(n),flags:r,seekable:!0,position:0,stream_ops:n.stream_ops,ungotten:[],error:!1});return u.stream_ops.open&&u.stream_ops.open(u),i&&me.chmod(n,511&t),u},close(e){if(me.isClosed(e))throw new 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s=B[i];o+=String.fromCharCode(s)}return o},xr=(e,r,t)=>{if(t??=2147483647,t<2)return 0;for(var n=r,a=(t-=2)<2*e.length?t/2:e.length,o=0;o<a;++o){var i=e.charCodeAt(o);b[r>>1]=i,r+=2}return b[r>>1]=0,r-n},_r=e=>2*e.length,kr=(e,r,t)=>{for(var n="",a=e>>2,o=0;!(o>=r/4);o++){var i=T[a+o];if(!i&&!t)break;n+=String.fromCodePoint(i)}return n},Br=(e,r,t)=>{if(t??=2147483647,t<4)return 0;for(var n=r,a=n+t-4,o=0;o<e.length;++o){var i=e.codePointAt(o);if(i>65535&&o++,w[r>>2]=i,(r+=4)+4>a)break}return w[r>>2]=0,r-n},Tr=e=>{for(var r=0,t=0;t<e.length;++t)e.codePointAt(t)>65535&&t++,r+=4;return r},Pr=[],Cr=(e,r,t)=>{var n=[],a=e(n,t);return n.length&&(T[r>>2]=pr.toHandle(n)),a},$r={},Ar=e=>{var r=$r[e];return void 0===r?Be(e):r},Sr=e=>e<-9007199254740992||e>9007199254740992?NaN:Number(e),Dr=()=>performance.now(),Fr=()=>Date.now(),Lr=e=>{var r=["ANGLE_instanced_arrays","EXT_blend_minmax","EXT_disjoint_timer_query","EXT_frag_depth","EXT_shader_texture_lod","EXT_sRGB","OES_element_index_uint","OES_fbo_render_mipmap","OES_standard_derivatives","OES_texture_float","OES_texture_half_float","OES_texture_half_float_linear","OES_vertex_array_object","WEBGL_color_buffer_float","WEBGL_depth_texture","WEBGL_draw_buffers","EXT_color_buffer_float","EXT_conservative_depth","EXT_disjoint_timer_query_webgl2","EXT_texture_norm16","NV_shader_noperspective_interpolation","WEBGL_clip_cull_distance","EXT_clip_control","EXT_color_buffer_half_float","EXT_depth_clamp","EXT_float_blend","EXT_polygon_offset_clamp","EXT_texture_compression_bptc","EXT_texture_compression_rgtc","EXT_texture_filter_anisotropic","KHR_parallel_shader_compile","OES_texture_float_linear","WEBGL_blend_func_extended","WEBGL_compressed_texture_astc","WEBGL_compressed_texture_etc","WEBGL_compressed_texture_etc1","WEBGL_compressed_texture_s3tc","WEBGL_compressed_texture_s3tc_srgb","WEBGL_debug_renderer_info","WEBGL_debug_shaders","WEBGL_lose_context","WEBGL_multi_draw","WEBGL_polygon_mode"];return(e.getSupportedExtensions()||[]).filter(e=>r.includes(e))},Ir={counter:1,buffers:[],mappedBuffers:{},programs:[],framebuffers:[],renderbuffers:[],textures:[],shaders:[],vaos:[],contexts:[],offscreenCanvases:{},queries:[],samplers:[],transformFeedbacks:[],syncs:[],byteSizeByTypeRoot:5120,byteSizeByType:[1,1,2,2,4,4,4,2,3,4,8],stringCache:{},stringiCache:{},unpackAlignment:4,unpackRowLength:0,recordError:e=>{Ir.lastError||(Ir.lastError=e)},getNewId:e=>{for(var r=Ir.counter++,t=e.length;t<r;t++)e[t]=null;for(;e[r];)r=Ir.counter++;return r},genObject:(e,r,t,n)=>{for(var a=0;a<e;a++){var o=ur[t](),i=o&&Ir.getNewId(n);o?(o.name=i,n[i]=o):Ir.recordError(1282),w[r+4*a>>2]=i}},MAX_TEMP_BUFFER_SIZE:2097152,numTempVertexBuffersPerSize:64,log2ceilLookup:e=>32-Math.clz32(0===e?0:e-1),generateTempBuffers:(e,r)=>{var t=Ir.log2ceilLookup(Ir.MAX_TEMP_BUFFER_SIZE);r.tempVertexBufferCounters1=[],r.tempVertexBufferCounters2=[],r.tempVertexBufferCounters1.length=r.tempVertexBufferCounters2.length=t+1,r.tempVertexBuffers1=[],r.tempVertexBuffers2=[],r.tempVertexBuffers1.length=r.tempVertexBuffers2.length=t+1,r.tempIndexBuffers=[],r.tempIndexBuffers.length=t+1;for(var n=0;n<=t;++n){r.tempIndexBuffers[n]=null,r.tempVertexBufferCounters1[n]=r.tempVertexBufferCounters2[n]=0;var a=Ir.numTempVertexBuffersPerSize;r.tempVertexBuffers1[n]=[],r.tempVertexBuffers2[n]=[];var o=r.tempVertexBuffers1[n],i=r.tempVertexBuffers2[n];o.length=i.length=a;for(var s=0;s<a;++s)o[s]=i[s]=null}if(e){r.tempQuadIndexBuffer=ur.createBuffer(),r.GLctx.bindBuffer(34963,r.tempQuadIndexBuffer);for(var u=Ir.MAX_TEMP_BUFFER_SIZE>>1,f=new Uint16Array(u),c=(n=0,0);f[n++]=c,!(n>=u||(f[n++]=c+1,n>=u)||(f[n++]=c+2,n>=u)||(f[n++]=c,n>=u)||(f[n++]=c+2,n>=u)||(f[n++]=c+3,n>=u));)c+=4;r.GLctx.bufferData(34963,f,35044),r.GLctx.bindBuffer(34963,null)}},getTempVertexBuffer:e=>{var r=Ir.log2ceilLookup(e),t=Ir.currentContext.tempVertexBuffers1[r],n=Ir.currentContext.tempVertexBufferCounters1[r];Ir.currentContext.tempVertexBufferCounters1[r]=Ir.currentContext.tempVertexBufferCounters1[r]+1&Ir.numTempVertexBuffersPerSize-1;var a=t[n];if(a)return a;var o=ur.getParameter(34964);return t[n]=ur.createBuffer(),ur.bindBuffer(34962,t[n]),ur.bufferData(34962,1<<r,35048),ur.bindBuffer(34962,o),t[n]},getTempIndexBuffer:e=>{var r=Ir.log2ceilLookup(e),t=Ir.currentContext.tempIndexBuffers[r];if(t)return t;var n=ur.getParameter(34965);return Ir.currentContext.tempIndexBuffers[r]=ur.createBuffer(),ur.bindBuffer(34963,Ir.currentContext.tempIndexBuffers[r]),ur.bufferData(34963,1<<r,35048),ur.bindBuffer(34963,n),Ir.currentContext.tempIndexBuffers[r]},newRenderingFrameStarted:()=>{if(Ir.currentContext){var e=Ir.currentContext.tempVertexBuffers1;Ir.currentContext.tempVertexBuffers1=Ir.currentContext.tempVertexBuffers2,Ir.currentContext.tempVertexBuffers2=e,e=Ir.currentContext.tempVertexBufferCounters1,Ir.currentContext.tempVertexBufferCounters1=Ir.currentContext.tempVertexBufferCounters2,Ir.currentContext.tempVertexBufferCounters2=e;for(var r=Ir.log2ceilLookup(Ir.MAX_TEMP_BUFFER_SIZE),t=0;t<=r;++t)Ir.currentContext.tempVertexBufferCounters1[t]=0}},getSource:(e,r,t,n)=>{for(var a="",o=0;o<r;++o){var i=n?T[n+4*o>>2]:void 0;a+=pe(T[t+4*o>>2],i)}return a},calcBufLength:(e,r,t,n)=>t>0?n*t:e*Ir.byteSizeByType[r-Ir.byteSizeByTypeRoot]*n,usedTempBuffers:[],preDrawHandleClientVertexAttribBindings:e=>{Ir.resetBufferBinding=!1;for(var r=0;r<Ir.currentContext.maxVertexAttribs;++r){var t=Ir.currentContext.clientBuffers[r];if(t.clientside&&t.enabled){Ir.resetBufferBinding=!0;var n=Ir.calcBufLength(t.size,t.type,t.stride,e),a=Ir.getTempVertexBuffer(n);ur.bindBuffer(34962,a),ur.bufferSubData(34962,0,C.subarray(t.ptr,t.ptr+n)),t.vertexAttribPointerAdaptor.call(ur,r,t.size,t.type,t.normalized,t.stride,0)}}},postDrawHandleClientVertexAttribBindings:()=>{Ir.resetBufferBinding&&ur.bindBuffer(34962,Ir.buffers[ur.currentArrayBufferBinding])},createContext:(e,r)=>{if(t.preinitializedWebGLContext){var n=t.preinitializedWebGLContext;r.majorVersion=Number(n.getParameter(n.VERSION).match(/^WebGL (\d+).\d+/)[1])}else e.getContextSafariWebGL2Fixed||(e.getContextSafariWebGL2Fixed=e.getContext,e.getContext=function(r,t){var n=e.getContextSafariWebGL2Fixed(r,t);return"webgl"==r==n instanceof WebGLRenderingContext?n:null}),n=r.majorVersion>1?e.getContext("webgl2",r):e.getContext("webgl",r);return n?Ir.registerContext(n,r):0},registerContext:(e,r)=>{var t=Ir.getNewId(Ir.contexts),n={handle:t,attributes:r,version:r.majorVers