@n.see/gif-parser - npm Package Compare versions

Comparing version 1.0.6 to 1.0.7

dist/gif-parser.es.js

@@ -32,3 +32,2 @@ var __defProp = Object.defineProperty;
     this.littleEndian = littleEndian || false;
-    console.log("this.dataView", this.dataView);
   }
@@ -167,2 +166,3 @@ check(size) {
     this.length = this.stream.getOffset() - this.offset;
+    console.log("this.signature", this.signature);
     if (this.signature !== "GIF")
@@ -216,3 +216,3 @@ throw new Error("Not a GIF file.");
   getGlobalColorTableSize() {
-    return 1 << this.globalColorTableSize + 1;
+    return this.globalColorTableSize;
   }
@@ -258,4 +258,5 @@ export() {
   parse({ size = 0 }) {
+    const globalColorTableSize = 1 << size + 1;
     this.offset = this.stream.getOffset();
-    for (let i = 0; i < size; i++) {
+    for (let i = 0; i < globalColorTableSize; i++) {
       this.colors.push(this.stream.readUint8Array(3));
@@ -337,4 +338,3 @@ }
     this.transparentColorFlag = bits.shift() || 0;
-    this.delayTime = this.stream.readUint8();
-    this.stream.seek(1);
+    this.delayTime = this.stream.readUint16();
     this.transparentColorIndex = this.stream.readUint8();
@@ -1067,4 +1067,3 @@ this.blockTerminator = this.stream.readString(1);
       const localColorTableSize = this.imageDescriptor.getLocalColorTableSize();
-      const size = 1 << localColorTableSize + 1;
-      this.localColorTable.parse({ size });
+      this.localColorTable.parse({ size: localColorTableSize });
     }
@@ -1206,3 +1205,3 @@ this.imageContent.parse();
   exportWarn() {
-    console.warn(`parser.export()`);
+    console.warn.call(this, `parser.export()`);
     return [];
@@ -1209,0 +1208,0 @@ }

dist/gif-parser.umd.js

@@ -1,1 +0,1 @@
-var st=Object.defineProperty,it=Object.defineProperties;var rt=Object.getOwnPropertyDescriptors;var B=Object.getOwnPropertySymbols;var at=Object.prototype.hasOwnProperty,ot=Object.prototype.propertyIsEnumerable;var D=(g,d,b)=>d in g?st(g,d,{enumerable:!0,configurable:!0,writable:!0,value:b}):g[d]=b,I=(g,d)=>{for(var b in d||(d={}))at.call(d,b)&&D(g,b,d[b]);if(B)for(var b of B(d))ot.call(d,b)&&D(g,b,d[b]);return g},L=(g,d)=>it(g,rt(d));var s=(g,d,b)=>(D(g,typeof d!="symbol"?d+"":d,b),b);(function(g,d){typeof exports=="object"&&typeof module!="undefined"?d(exports):typeof define=="function"&&define.amd?define(["exports"],d):(g=typeof globalThis!="undefined"?globalThis:g||self,d(g.gifParser={}))})(this,function(g){"use strict";class d{constructor(t,e){s(this,"index",0);s(this,"dataView");this.arrayBuffer=t,this.littleEndian=e,this.dataView=new DataView(t),this.littleEndian=e||!1,console.log("this.dataView",this.dataView)}check(t){return this.index+t<=this.dataView.byteLength}seek(t){this.index+=t}peekByte(t=0){return this.check(1+t),this.dataView.getUint8(this.index+t)}slice(t,e){return new Uint8Array(this.dataView.buffer,t,e)}readUint8(){this.check(1);const t=this.dataView.getUint8(this.index);return this.seek(1),t}readUint8Array(t){const e=[];for(let i=0;i<t;i++)e.push(this.readUint8());return e}readUint16(){this.check(2);const t=this.dataView.getUint16(this.index,this.littleEndian);return this.seek(2),t}readUint32(){this.check(4);const t=this.dataView.getUint32(this.index,this.littleEndian);return this.seek(4),t}readInt32(){this.check(4);const t=this.dataView.getInt32(this.index,this.littleEndian);return this.seek(4),t}readString(t){let e="";for(let i=0;i<t;i++)e+=String.fromCharCode(this.readUint8());return e}readEscapedString(t){let e="";for(let i=0;i<t;i++){const r=this.readUint8();r>=32&&r<=126?e+=String.fromCharCode(r):e+=`\\x${r.toString(16).padStart(2,"0")}`}return e}readNullTerminatedString(){let t="",e=this.readUint8();for(;e!==0;)t+=String.fromCharCode(e),e=this.readUint8();return t}hasMore(t){return this.check(1),this.index<=this.dataView.byteLength-(t||1)}setOffset(t){this.index=t}getOffset(){return this.index}readInt8(){const t=this.dataView.getInt8(this.index);return this.seek(1),t}}function b(o){return o.reduce((t,e)=>t*2+e,0)}function T(o){let t=[];for(let e=7;e>=0;e--)t.push(!!(o&1<<e));return t.map(e=>Number(e))}function A(o){return fetch(o).then(t=>t.arrayBuffer())}function m(o,t,e){try{return o.slice(t,e)}catch{return new Uint8Array(0)}}function O(o){const t=parseInt(`${o}`).toString(16);return(t.length===2?t:`0${t}`).toUpperCase()}class v{constructor(t){s(this,"type","Header");s(this,"offset",0);s(this,"length",0);s(this,"bytes",new Uint8Array(0));s(this,"signature","");s(this,"version","");this.stream=t,this.stream=t}parse(){if(this.offset=this.stream.getOffset(),this.signature=this.stream.readString(3),this.version=this.stream.readString(3),this.length=this.stream.getOffset()-this.offset,this.signature!=="GIF")throw new Error("Not a GIF file.")}export(){return{type:this.type,offset:this.offset,length:this.length,bytes:m(this.stream,this.offset,this.length),data:{signature:this.signature,version:this.version}}}}class R{constructor(t){s(this,"type","LogicalScreenDescriptor");s(this,"offset",0);s(this,"length",0);s(this,"bytes",new Uint8Array(0));s(this,"width",0);s(this,"height",0);s(this,"packedFields",[]);s(this,"globalColorTableFlag",0);s(this,"colorResolution",0);s(this,"sortFlag",0);s(this,"globalColorTableSize",0);s(this,"backgroundColorIndex",0);s(this,"pixelAspectRatio",0);this.stream=t,this.stream=t}parse(){this.offset=this.stream.getOffset(),this.width=this.stream.readUint16(),this.height=this.stream.readUint16(),this.packedFields=T(this.stream.readUint8()),this.handlerPackedField(this.packedFields),this.backgroundColorIndex=this.stream.readUint8(),this.pixelAspectRatio=this.stream.readInt8(),this.length=this.stream.getOffset()-this.offset}hasGlobalColorTable(){return!!this.globalColorTableFlag}getGlobalColorTableSize(){return 1<<this.globalColorTableSize+1}export(){return{type:this.type,offset:this.offset,length:this.length,bytes:m(this.stream,this.offset,this.length),data:{width:this.width,height:this.height,packedFields:this.packedFields,globalColorTableFlag:this.globalColorTableFlag,colorResolution:this.colorResolution,sortFlag:this.sortFlag,globalColorTableSize:this.globalColorTableSize,backgroundColorIndex:this.backgroundColorIndex,pixelAspectRatio:this.pixelAspectRatio}}}handlerPackedField(t){const e=[...t];this.globalColorTableFlag=e.shift()||0,this.colorResolution=b(e.splice(0,3))+1,this.sortFlag=e.shift()||0,this.globalColorTableSize=b(e.splice(0,3))}}class z{constructor(t,e){s(this,"type","");s(this,"offset",0);s(this,"length",0);s(this,"bytes",new Uint8Array(0));s(this,"colors",[]);this.stream=t,this.stream=t,this.type=e}parse({size:t=0}){this.offset=this.stream.getOffset();for(let e=0;e<t;e++)this.colors.push(this.stream.readUint8Array(3));this.length=this.stream.getOffset()-this.offset}export(){return{type:this.type,offset:this.offset,length:this.length,bytes:m(this.stream,this.offset,this.length),data:this.colors}}}class G extends z{constructor(t){super(t,"GlobalColorTable")}}class k{constructor(t){s(this,"stream");this.stream=t}parse(t){}export(){}readSubBlocks(){const t=this.stream.getOffset();let e=this.stream.readInt8(),i=1;const r=[];for(;e>0;)r.push({offset:t+i,length:e}),i+=e+1,this.stream.seek(e),e=this.stream.readUint8();return{blocks:r,blocksLength:i}}}class M extends k{constructor(t){super(t);s(this,"type","GraphicsControlExtension");s(this,"offset",0);s(this,"length",0);s(this,"bytes",new Uint8Array(0));s(this,"introducer","");s(this,"label","");s(this,"blockSize",0);s(this,"packedFields",[]);s(this,"reserved",[]);s(this,"disposalMethod",0);s(this,"userInputFlag",0);s(this,"transparentColorFlag",0);s(this,"delayTime",0);s(this,"transparentColorIndex",0);s(this,"blockTerminator","");this.stream=t}parse({introducer:t=0,label:e=0}){this.offset=this.stream.getOffset()-2,this.introducer=String.fromCharCode(t),this.label=O(e),this.blockSize=this.stream.readUint8(),this.packedFields=T(this.stream.readUint8());const i=[...this.packedFields];this.reserved=i.splice(0,3),this.disposalMethod=b(i.splice(0,3)),this.userInputFlag=i.shift()||0,this.transparentColorFlag=i.shift()||0,this.delayTime=this.stream.readUint8(),this.stream.seek(1),this.transparentColorIndex=this.stream.readUint8(),this.blockTerminator=this.stream.readString(1),this.length=this.stream.getOffset()-this.offset}export(){return{type:this.type,offset:this.offset,length:this.length,bytes:m(this.stream,this.offset,this.length),data:{introducer:this.introducer,label:this.label,blockSize:this.blockSize,packedFields:this.packedFields,reserved:this.reserved,disposalMethod:this.disposalMethod,userInputFlag:this.userInputFlag,transparentColorFlag:this.transparentColorFlag,delayTime:this.delayTime,transparentColorIndex:this.transparentColorIndex,blockTerminator:this.blockTerminator}}}}class V extends k{constructor(t){super(t);s(this,"type","CommentExtension");s(this,"offset",0);s(this,"length",0);s(this,"bytes",new Uint8Array(0));s(this,"comment",{});this.stream=t}parse({introducer:t,label:e}){this.offset=this.stream.getOffset(),this.comment=this.readSubBlocks(),this.length=this.stream.getOffset()-this.offset}export(){return{type:this.type,offset:this.offset,length:this.length,bytes:m(this.stream,this.offset,this.length),data:this.comment}}}class P extends k{constructor(t){super(t);s(this,"type","PlainTextExtension");s(this,"blockSize",0);s(this,"left",0);s(this,"top",0);s(this,"width",0);s(this,"height",0);s(this,"cellWidth",0);s(this,"cellHeight",0);s(this,"foregroundColorIndex",0);s(this,"backgroundColorIndex",0);s(this,"data",{});this.stream=t}parse({introducer:t,label:e}){this.offset=this.stream.getOffset(),this.blockSize=this.stream.readUint8(),this.left=this.stream.readUint16(),this.top=this.stream.readUint16(),this.width=this.stream.readUint16(),this.height=this.stream.readUint16(),this.cellWidth=this.stream.readUint8(),this.cellHeight=this.stream.readUint8(),this.foregroundColorIndex=this.stream.readUint8(),this.backgroundColorIndex=this.stream.readUint8(),this.data=this.readSubBlocks(),this.length=this.stream.getOffset()-this.offset}export(){return{type:this.type,offset:this.offset,length:this.length,bytes:m(this.stream,this.offset,this.length),data:this.data}}}class N extends k{constructor(t){super(t);s(this,"type","NetscapeExtension");s(this,"offset",0);s(this,"length",0);s(this,"bytes",new Uint8Array(0));s(this,"blockSize",0);s(this,"subblock",0);s(this,"loop",0);s(this,"terminator",0);s(this,"decode","");this.stream=t}parse({introducer:t,label:e}){this.offset=this.stream.getOffset(),this.blockSize=this.stream.readUint8(),this.subblock=this.stream.readUint8(),this.loop=this.stream.readUint16(),this.terminator=this.stream.readInt8(),this.decode=`Loop: ${this.loop>0?this.loop:"forever"}`,this.length=this.stream.getOffset()-this.offset}export(){return{type:this.type,offset:this.offset,length:this.length,bytes:m(this.stream,this.offset,this.length),data:{blockSize:this.blockSize,subblock:this.subblock,loop:this.loop,terminator:this.terminator,decode:this.decode}}}}const x=class{constructor(t){s(this,"buffer",null);t instanceof ArrayBuffer?this.buffer=t:t instanceof Uint8Array?this.buffer=t.buffer:(typeof t=="string"||t instanceof String)&&this.fromDataUri(t)}static dataUriToBuffer(t){let e=atob(t.split(",")[1]),i=e.length,r=new ArrayBuffer(i),a=new Uint8Array(r);for(let f=0;f<i;f++)a[f]=e.charCodeAt(f);return r}static find(t){let e;t instanceof ArrayBuffer?e=t:t instanceof Uint8Array?this.buffer=t.buffer:(typeof t=="string"||t instanceof String)&&(e=x.dataUriToBuffer(t));let i=new DataView(e);if(!e)return;const r="<x:xmpmeta",a=r.length,f=e.byteLength-a,c="x:xmpmeta>",p=c.length,h=e.byteLength-p;let n=2,l=n+a,u=!1;for(;n<f;)if(x.stringFromBuffer(i,n,a)==r){u=!0;break}else n++;if(!u)return console.warn("XMP not found"),null;for(;l<h&&x.stringFromBuffer(i,l,p)!=c;)l++;return l+=p,x.stringFromBuffer(i,n,l-n)}static stringFromBuffer(t,e,i){let r="";for(let a=e;a<e+i;a++)r+=String.fromCharCode(t.getUint8(a));return r}static execFind(t,e){let i=[],r=!0;for(;r;){let a=e.exec(t);a?i.push(a):r=!1}return i}static toTree(t){let e=[];if(!t||!t.length)return e;const i=t.shift(),r=t.findIndex(a=>`</${i.tag}>`===a.raw);return t.splice(r,1),e.push(L(I({},i),{children:x.toTree(t)})),e}static parse(t){if(!t)return null;const e=new RegExp("<[^>]+>","gi"),r=x.execFind(t,e).map((a,f)=>{const c=new RegExp("<(.*?)\\s","g"),p=new RegExp('\\s(.*?)="(.*?)"',"g"),h=a[0],n=c.exec(h),l=x.execFind(h,p);let u={};return l.forEach(w=>{const[,S,E]=w;u[S]=E}),{raw:h,tag:n?n[1]:null,attrs:u}});return x.toTree(r)}fromDataUri(t){this.buffer=x.dataUriToBuffer(t)}find(){return x.find(this.buffer)||""}parse(){let t=this.find();return x.parse(t)}};let U=x;s(U,"buffer",null);class $ extends k{constructor(t){super(t);s(this,"type","XMPDataExtension");s(this,"offset",0);s(this,"length",0);s(this,"bytes",new Uint8Array(0));s(this,"blockSize",0);s(this,"xmpData",[]);this.stream=t}parse({introducer:t,label:e}){this.offset=this.stream.getOffset();const{blocks:i}=this.readSubBlocks();i.forEach(f=>{this.blockSize+=f.length});const r=this.stream.slice(this.offset,this.blockSize);let a=new U(r);this.xmpData=a.parse(),this.length=this.stream.getOffset()-this.offset}export(){return{type:this.type,offset:this.offset,length:this.length,bytes:m(this.stream,this.offset,this.length),data:{blockSize:this.blockSize,xmpData:this.xmpData}}}}class H extends k{constructor(t){super(t);s(this,"type","UnknownApplicationExtension");s(this,"offset",0);s(this,"length",0);s(this,"bytes",new Uint8Array(0));s(this,"appData",{});this.stream=t}parse({introducer:t,label:e}){console.log("introducer, label",t,e),this.offset=this.stream.getOffset(),this.appData=this.readSubBlocks(),this.length=this.stream.getOffset()-this.offset}export(){return{type:this.type,offset:this.offset,length:this.length,bytes:m(this.stream,this.offset,this.length),data:this.appData}}}class W extends k{constructor(t){super(t);s(this,"type","ApplicationExtension");s(this,"offset",0);s(this,"length",0);s(this,"bytes",new Uint8Array(0));s(this,"introducer","");s(this,"label","");s(this,"blockSize",0);s(this,"identifier","");s(this,"authenticationCode","");s(this,"appData");s(this,"netscapeExtension");s(this,"xmpdataExtension");s(this,"unknownApplicationExtension");this.stream=t,this.netscapeExtension=new N(t),this.xmpdataExtension=new $(t),this.unknownApplicationExtension=new H(t),this.appData={}}parse({introducer:t=0,label:e=0}){this.introducer=String.fromCharCode(t),this.label=O(e),this.offset=this.stream.getOffset()-2,this.blockSize=this.stream.readInt8(),this.identifier=this.stream.readString(8),this.authenticationCode=this.stream.readString(3),this.identifier==="NETSCAPE"?(this.netscapeExtension.parse({introducer:t,label:e}),this.appData=this.netscapeExtension.export()):this.identifier==="XMP Data"?(this.xmpdataExtension.parse({introducer:t,label:e}),this.appData=this.xmpdataExtension.export()):(this.unknownApplicationExtension.parse({introducer:t,label:e}),this.appData=this.unknownApplicationExtension.export()),this.length=this.stream.getOffset()-this.offset}export(){return{type:this.type,offset:this.offset,length:this.length,bytes:m(this.stream,this.offset,this.length),data:{introducer:this.introducer,label:this.label,blockSize:this.blockSize,identifier:this.identifier,authenticationCode:this.authenticationCode,appData:this.appData}}}}class j extends k{constructor(t){super(t);s(this,"type","UnknownExtension");s(this,"data",{});this.stream=t}parse({introducer:t,label:e}){this.offset=this.stream.getOffset(),this.data=this.readSubBlocks(),this.length=this.stream.getOffset()-this.offset}export(){return{type:this.type,offset:this.offset,length:this.length,bytes:m(this.stream,this.offset,this.length),data:this.data}}}class X{constructor(t){s(this,"extensionBlock",{});s(this,"graphicsControlExtension");s(this,"plainTextExtension");s(this,"commentExtension");s(this,"applicationExtension");s(this,"unknownExtension");this.stream=t,this.stream=t,this.graphicsControlExtension=new M(t),this.commentExtension=new V(t),this.plainTextExtension=new P(t),this.applicationExtension=new W(t),this.unknownExtension=new j(t)}parse({introducer:t}){const e=this.stream.readUint8();switch(e){case 249:this.graphicsControlExtension.parse({introducer:t,label:e}),this.extensionBlock=this.graphicsControlExtension.export();break;case 254:this.commentExtension.parse({introducer:t,label:e}),this.extensionBlock=this.commentExtension.export();break;case 1:this.plainTextExtension.parse({introducer:t,label:e}),this.extensionBlock=this.plainTextExtension.export();break;case 255:this.applicationExtension.parse({introducer:t,label:e}),this.extensionBlock=this.applicationExtension.export();break;default:this.unknownExtension.parse({introducer:t,label:e}),this.extensionBlock=this.unknownExtension.export();break}}export(){return this.extensionBlock}}class q extends z{constructor(t){super(t,"LocalColorTable")}}class J{constructor(t){s(this,"type","ImageDescriptor");s(this,"offset",0);s(this,"length",0);s(this,"bytes",new Uint8Array(0));s(this,"introducer","");s(this,"left",0);s(this,"top",0);s(this,"width",0);s(this,"height",0);s(this,"packedFields",[]);s(this,"localColorTableFlag",0);s(this,"interlaceFlag",0);s(this,"sortFlag",0);s(this,"reserved",[]);s(this,"localColorTableSize",0);this.stream=t,this.stream=t}hasLocalColorTable(){return!!this.localColorTableFlag}getLocalColorTableSize(){return this.localColorTableSize}parse({introducer:t=0}){this.introducer=String.fromCharCode(t),this.offset=this.stream.getOffset()-1,this.left=this.stream.readUint16(),this.top=this.stream.readUint16(),this.width=this.stream.readUint16(),this.height=this.stream.readUint16(),this.packedFields=T(this.stream.readUint8());const e=[...this.packedFields];this.localColorTableFlag=e.shift()||0,this.interlaceFlag=e.shift()||0,this.sortFlag=e.shift()||0,this.reserved=e.splice(0,2),this.localColorTableSize=b(e.splice(0,3)),this.length=this.stream.getOffset()-this.offset}export(){return{type:this.type,offset:this.offset,length:this.length,bytes:m(this.stream,this.offset,this.length),data:{introducer:this.introducer,left:this.left,top:this.top,width:this.width,height:this.height,packedFields:this.packedFields,localColorTableFlag:this.localColorTableFlag,interlaceFlag:this.interlaceFlag,sortFlag:this.sortFlag,reserved:this.reserved,localColorTableSize:this.localColorTableSize}}}}class K{constructor(t){s(this,"bytes");s(this,"byteOffset");s(this,"bitOffset");s(this,"totalByteOffset");this.bytes=t||new Int8Array,this.byteOffset=0,this.bitOffset=0,this.totalByteOffset=0}readBits(t){let e=0,i=0;for(;i<t;){if(this.byteOffset>=this.bytes.length)throw new Error(`Not enough bytes to read ${t} bits (read ${i} bits)`);const r=Math.min(8-this.bitOffset,t-i),a=255>>8-r<<this.bitOffset;e+=(this.bytes[this.byteOffset]&a)>>this.bitOffset<<i,i+=r,this.bitOffset+=r,this.bitOffset===8&&(this.byteOffset+=1,this.totalByteOffset+=1,this.bitOffset=0)}return e}hasBits(t=1){if(t>12)throw new Error(`Exceeds max bit size: ${t} (max: 12)`);if(this.byteOffset>=this.bytes.length)return!1;const e=8-this.bitOffset;if(t<=e)return!0;const i=this.bytes.length-this.byteOffset-1;return!(i<1||t>e+8*i)}setBytes(t,e=0,i=0){this.bytes=t,this.byteOffset=e,this.bitOffset=i}pushBytes(t){if(this.hasBits()){const e=this.bytes.length-this.byteOffset,i=new Uint8Array(e+t.length);i.set(this.bytes.slice(this.byteOffset)),i.set(t,e),this.bytes=i,this.byteOffset=0}else this.bytes=t,this.byteOffset=0,this.bitOffset=0}getState(){return{bitOffset:this.bitOffset,byteOffset:this.totalByteOffset}}}class Q{constructor(t){s(this,"type","ImageContent");s(this,"offset",0);s(this,"length",0);s(this,"bytes",new Uint8Array(0));s(this,"children",{});this.stream=t,this.stream=t}parse(){this.offset=this.stream.getOffset();const t=this.readImageContent();this.children=this.lzwDecode(t),this.length=this.stream.getOffset()-this.offset}lzwDecode(t){const{blocks:e,lzwMinimumCodeSize:i}=t,r=[],a=[];let f=[],c=[];const p=new K,h=2<<i-1,n=h+1;let l=n,u=i+1,w=(2<<u-1)-1,S=!1;for(const{offset:E,length:tt}of e)for(p.pushBytes(this.stream.slice(E,tt));p.hasBits(u);){const et=p.getState(),C=p.readBits(u);if(C===n){f.push(C);break}else if(C===h){a.push({stream:[],table:[],start:et}),f=a[a.length-1].stream,c=a[a.length-1].table;for(let y=0;y<=n;y++)c[y]=y<h?[y]:[];l=n,u=i+1,w=(2<<u-1)-1,S=!1}else if(!S)r.push(...c[C]),S=!0;else{let y=0;const F=f[f.length-1];C<=l?(r.push(...c[C]),y=c[C][0]):(y=c[F][0],r.push(...c[F],y)),l<4095&&(l+=1,c[l]=[...c[F],y],l===w&&l<4095&&(u+=1,w=(2<<u-1)-1))}f.push(C)}return Object.assign({},t,{indexStream:r,clearCode:h,eoiCode:n,codeUnits:a,blockCount:e.length,codeUnitCount:a.length})}export(){return{type:this.type,offset:this.offset,length:this.length,bytes:m(this.stream,this.offset,this.length),data:this.children}}readImageContent(){const t=this.stream.getOffset(),e=this.stream.readUint8();let{blocks:i}=this.readSubBlocks();const r=this.stream.getOffset()-t;return{offset:t,length:r,type:"image",lzwMinimumCodeSize:e,blocks:i}}readSubBlocks(){const t=this.stream.getOffset();let e=this.stream.readUint8(),i=1;const r=[];for(;e>0;)r.push({offset:t+i,length:e}),i+=e+1,this.stream.seek(e),e=this.stream.readUint8();return i+=1,{blocks:r,blocksLength:i}}}class Y{constructor(t){s(this,"localColorTable");s(this,"imageDescriptor");s(this,"imageContent");this.stream=t,this.stream=t,this.localColorTable=new q(t),this.imageDescriptor=new J(t),this.imageContent=new Q(t)}parse({introducer:t}){if(this.imageDescriptor.parse({introducer:t}),this.imageDescriptor.hasLocalColorTable()){const e=this.imageDescriptor.getLocalColorTableSize(),i=1<<e+1;this.localColorTable.parse({size:i})}this.imageContent.parse()}createFrame(t,e,i,r){const a=document.createElement("canvas");a.width=i,a.height=r;const c=a.getContext("2d").createImageData(i,r),p=c.data;for(let h=0,n=0;h<e.length;h+=1,n+=4)p[n+0]=t[e[h]][0],p[n+1]=t[e[h]][1],p[n+2]=t[e[h]][2],p[n+3]=e[h]!==88?255:0;return c}exportFrameData(t){const{width:e,height:i,left:r,top:a,localColorTableFlag:f}=this.imageDescriptor.export().data,{indexStream:c}=this.imageContent.export().data;let p=this.imageDescriptor.hasLocalColorTable()?this.localColorTable.export():t||{};return{type:"Frame",data:{width:e,height:i,left:r,top:a,localColorTableFlag:f,imageData:this.createFrame(p.data,c,e,i)}}}export(){const t=this.imageDescriptor.export(),e=this.imageContent.export();if(!this.imageDescriptor.hasLocalColorTable())return[t,e];const i=this.localColorTable.export();return[t,i,e]}}class Z{constructor(t){s(this,"type","Block");s(this,"offset",0);s(this,"length",0);s(this,"blocks",[]);s(this,"extension");s(this,"imageData");this.stream=t,this.stream=t,this.extension=new X(this.stream),this.imageData=new Y(this.stream)}parse(t){for(this.offset=this.stream.getOffset();this.stream.hasMore();){const e=this.stream.readUint8();switch(String.fromCharCode(e)){case"!":this.extension.parse({introducer:e}),this.blocks.push(this.extension.export());break;case",":this.imageData.parse({introducer:e}),this.blocks.push(...this.imageData.export());break;case";":console.log("end block");break;default:throw new Error("Unknown block: 0x"+e.toString(16))}}this.length=this.stream.getOffset()-this.offset}export(){return this.blocks}}class _{constructor(t){s(this,"parsed");s(this,"blockList");s(this,"dataList");s(this,"stream");s(this,"header");s(this,"logicalScreenDescriptor");s(this,"globalColorTable");s(this,"block");s(this,"isExport",!1);console.log("GifParser init"),this.parsed=!1,this.blockList=[],this.dataList=[],this.stream=new d(t,!0),this.header=new v(this.stream),this.logicalScreenDescriptor=new R(this.stream),this.globalColorTable=new G(this.stream),this.block=new Z(this.stream),this.parse()}parse(){if(!this.parsed){if(this.header.parse(),this.logicalScreenDescriptor.parse(),this.logicalScreenDescriptor.hasGlobalColorTable()){const t=this.logicalScreenDescriptor.getGlobalColorTableSize();this.globalColorTable.parse({size:t})}this.block.parse(this.logicalScreenDescriptor.hasGlobalColorTable()?this.globalColorTable.export():void 0),this.parsed=!0}}getSize(){const{data:t}=this.logicalScreenDescriptor.export();return[t.width,t.height]}export(){this.isExport||(this.blockList.push(this.header.export()),this.blockList.push(this.logicalScreenDescriptor.export()),this.logicalScreenDescriptor.hasGlobalColorTable()&&this.blockList.push(this.globalColorTable.export()),this.blockList.push(...this.block.export()),this.dataHandler(),this.isExport=!0)}exportWarn(){return console.warn("parser.export()"),[]}getBlockList(){return this.blockList}getDataList(){return this.isExport?this.dataList:this.exportWarn()}createImageData({colorTable:t,indexStream:e,width:i,height:r,transparency:a}){const f=document.createElement("canvas");f.width=i,f.height=r;const p=f.getContext("2d").createImageData(i,r),h=p.data;for(let n=0,l=0;n<e.length;n+=1,l+=4)e[n]!==a?(h[l+0]=t[e[n]][0],h[l+1]=t[e[n]][1],h[l+2]=t[e[n]][2],h[l+3]=255):(h[l+0]=0,h[l+1]=0,h[l+2]=0,h[l+3]=0);return p}dataHandler(){let t={};const e=this.blockList.find(i=>i.type==="GlobalColorTable");this.blockList.forEach(i=>{if(i.type==="GraphicsControlExtension")t[i.type]=i.data,this.dataList.push(i);else if(i.type==="ImageDescriptor")t[i.type]=i.data,this.dataList.push(i);else if(i.type==="ImageContent"){t[i.type]=i.data,this.dataList.push(i);const{delayTime:r,disposalMethod:a,transparentColorFlag:f,transparentColorIndex:c}=t.GraphicsControlExtension,{localColorTableFlag:p,left:h,top:n,width:l,height:u}=t.ImageDescriptor,{indexStream:w}=t.ImageContent,S=f?c:null,E=p?null:e==null?void 0:e.data;t.Frame={delayTime:r,disposalMethod:a,transparency:S,colorTable:E,indexStream:w,left:h,top:n,width:l,height:u},Object.assign(t.Frame,{imageData:this.createImageData(t.Frame)}),this.dataList.push({type:"Frame",data:t.Frame})}else this.dataList.push(i)})}getFrames(){return this.isExport?this.dataList.filter(t=>t.type==="Frame").map(t=>{const{delayTime:e,transparency:i,left:r,top:a,width:f,height:c,imageData:p}=t.data;return{delayTime:e,transparency:i,left:r,top:a,width:f,height:c,imageData:p}}):this.exportWarn()}getBlockItem(t){const e=this.blockList.find(i=>i.type===t);return e&&e.data}}g.Parser=_,g.loadGif=A,Object.defineProperty(g,"__esModule",{value:!0}),g[Symbol.toStringTag]="Module"});
+var st=Object.defineProperty,it=Object.defineProperties;var rt=Object.getOwnPropertyDescriptors;var B=Object.getOwnPropertySymbols;var at=Object.prototype.hasOwnProperty,ot=Object.prototype.propertyIsEnumerable;var D=(g,d,b)=>d in g?st(g,d,{enumerable:!0,configurable:!0,writable:!0,value:b}):g[d]=b,I=(g,d)=>{for(var b in d||(d={}))at.call(d,b)&&D(g,b,d[b]);if(B)for(var b of B(d))ot.call(d,b)&&D(g,b,d[b]);return g},L=(g,d)=>it(g,rt(d));var s=(g,d,b)=>(D(g,typeof d!="symbol"?d+"":d,b),b);(function(g,d){typeof exports=="object"&&typeof module!="undefined"?d(exports):typeof define=="function"&&define.amd?define(["exports"],d):(g=typeof globalThis!="undefined"?globalThis:g||self,d(g.gifParser={}))})(this,function(g){"use strict";class d{constructor(t,e){s(this,"index",0);s(this,"dataView");this.arrayBuffer=t,this.littleEndian=e,this.dataView=new DataView(t),this.littleEndian=e||!1}check(t){return this.index+t<=this.dataView.byteLength}seek(t){this.index+=t}peekByte(t=0){return this.check(1+t),this.dataView.getUint8(this.index+t)}slice(t,e){return new Uint8Array(this.dataView.buffer,t,e)}readUint8(){this.check(1);const t=this.dataView.getUint8(this.index);return this.seek(1),t}readUint8Array(t){const e=[];for(let i=0;i<t;i++)e.push(this.readUint8());return e}readUint16(){this.check(2);const t=this.dataView.getUint16(this.index,this.littleEndian);return this.seek(2),t}readUint32(){this.check(4);const t=this.dataView.getUint32(this.index,this.littleEndian);return this.seek(4),t}readInt32(){this.check(4);const t=this.dataView.getInt32(this.index,this.littleEndian);return this.seek(4),t}readString(t){let e="";for(let i=0;i<t;i++)e+=String.fromCharCode(this.readUint8());return e}readEscapedString(t){let e="";for(let i=0;i<t;i++){const r=this.readUint8();r>=32&&r<=126?e+=String.fromCharCode(r):e+=`\\x${r.toString(16).padStart(2,"0")}`}return e}readNullTerminatedString(){let t="",e=this.readUint8();for(;e!==0;)t+=String.fromCharCode(e),e=this.readUint8();return t}hasMore(t){return this.check(1),this.index<=this.dataView.byteLength-(t||1)}setOffset(t){this.index=t}getOffset(){return this.index}readInt8(){const t=this.dataView.getInt8(this.index);return this.seek(1),t}}function b(o){return o.reduce((t,e)=>t*2+e,0)}function T(o){let t=[];for(let e=7;e>=0;e--)t.push(!!(o&1<<e));return t.map(e=>Number(e))}function A(o){return fetch(o).then(t=>t.arrayBuffer())}function m(o,t,e){try{return o.slice(t,e)}catch{return new Uint8Array(0)}}function O(o){const t=parseInt(`${o}`).toString(16);return(t.length===2?t:`0${t}`).toUpperCase()}class v{constructor(t){s(this,"type","Header");s(this,"offset",0);s(this,"length",0);s(this,"bytes",new Uint8Array(0));s(this,"signature","");s(this,"version","");this.stream=t,this.stream=t}parse(){if(this.offset=this.stream.getOffset(),this.signature=this.stream.readString(3),this.version=this.stream.readString(3),this.length=this.stream.getOffset()-this.offset,console.log("this.signature",this.signature),this.signature!=="GIF")throw new Error("Not a GIF file.")}export(){return{type:this.type,offset:this.offset,length:this.length,bytes:m(this.stream,this.offset,this.length),data:{signature:this.signature,version:this.version}}}}class R{constructor(t){s(this,"type","LogicalScreenDescriptor");s(this,"offset",0);s(this,"length",0);s(this,"bytes",new Uint8Array(0));s(this,"width",0);s(this,"height",0);s(this,"packedFields",[]);s(this,"globalColorTableFlag",0);s(this,"colorResolution",0);s(this,"sortFlag",0);s(this,"globalColorTableSize",0);s(this,"backgroundColorIndex",0);s(this,"pixelAspectRatio",0);this.stream=t,this.stream=t}parse(){this.offset=this.stream.getOffset(),this.width=this.stream.readUint16(),this.height=this.stream.readUint16(),this.packedFields=T(this.stream.readUint8()),this.handlerPackedField(this.packedFields),this.backgroundColorIndex=this.stream.readUint8(),this.pixelAspectRatio=this.stream.readInt8(),this.length=this.stream.getOffset()-this.offset}hasGlobalColorTable(){return!!this.globalColorTableFlag}getGlobalColorTableSize(){return this.globalColorTableSize}export(){return{type:this.type,offset:this.offset,length:this.length,bytes:m(this.stream,this.offset,this.length),data:{width:this.width,height:this.height,packedFields:this.packedFields,globalColorTableFlag:this.globalColorTableFlag,colorResolution:this.colorResolution,sortFlag:this.sortFlag,globalColorTableSize:this.globalColorTableSize,backgroundColorIndex:this.backgroundColorIndex,pixelAspectRatio:this.pixelAspectRatio}}}handlerPackedField(t){const e=[...t];this.globalColorTableFlag=e.shift()||0,this.colorResolution=b(e.splice(0,3))+1,this.sortFlag=e.shift()||0,this.globalColorTableSize=b(e.splice(0,3))}}class z{constructor(t,e){s(this,"type","");s(this,"offset",0);s(this,"length",0);s(this,"bytes",new Uint8Array(0));s(this,"colors",[]);this.stream=t,this.stream=t,this.type=e}parse({size:t=0}){const e=1<<t+1;this.offset=this.stream.getOffset();for(let i=0;i<e;i++)this.colors.push(this.stream.readUint8Array(3));this.length=this.stream.getOffset()-this.offset}export(){return{type:this.type,offset:this.offset,length:this.length,bytes:m(this.stream,this.offset,this.length),data:this.colors}}}class G extends z{constructor(t){super(t,"GlobalColorTable")}}class k{constructor(t){s(this,"stream");this.stream=t}parse(t){}export(){}readSubBlocks(){const t=this.stream.getOffset();let e=this.stream.readInt8(),i=1;const r=[];for(;e>0;)r.push({offset:t+i,length:e}),i+=e+1,this.stream.seek(e),e=this.stream.readUint8();return{blocks:r,blocksLength:i}}}class M extends k{constructor(t){super(t);s(this,"type","GraphicsControlExtension");s(this,"offset",0);s(this,"length",0);s(this,"bytes",new Uint8Array(0));s(this,"introducer","");s(this,"label","");s(this,"blockSize",0);s(this,"packedFields",[]);s(this,"reserved",[]);s(this,"disposalMethod",0);s(this,"userInputFlag",0);s(this,"transparentColorFlag",0);s(this,"delayTime",0);s(this,"transparentColorIndex",0);s(this,"blockTerminator","");this.stream=t}parse({introducer:t=0,label:e=0}){this.offset=this.stream.getOffset()-2,this.introducer=String.fromCharCode(t),this.label=O(e),this.blockSize=this.stream.readUint8(),this.packedFields=T(this.stream.readUint8());const i=[...this.packedFields];this.reserved=i.splice(0,3),this.disposalMethod=b(i.splice(0,3)),this.userInputFlag=i.shift()||0,this.transparentColorFlag=i.shift()||0,this.delayTime=this.stream.readUint16(),this.transparentColorIndex=this.stream.readUint8(),this.blockTerminator=this.stream.readString(1),this.length=this.stream.getOffset()-this.offset}export(){return{type:this.type,offset:this.offset,length:this.length,bytes:m(this.stream,this.offset,this.length),data:{introducer:this.introducer,label:this.label,blockSize:this.blockSize,packedFields:this.packedFields,reserved:this.reserved,disposalMethod:this.disposalMethod,userInputFlag:this.userInputFlag,transparentColorFlag:this.transparentColorFlag,delayTime:this.delayTime,transparentColorIndex:this.transparentColorIndex,blockTerminator:this.blockTerminator}}}}class P extends k{constructor(t){super(t);s(this,"type","CommentExtension");s(this,"offset",0);s(this,"length",0);s(this,"bytes",new Uint8Array(0));s(this,"comment",{});this.stream=t}parse({introducer:t,label:e}){this.offset=this.stream.getOffset(),this.comment=this.readSubBlocks(),this.length=this.stream.getOffset()-this.offset}export(){return{type:this.type,offset:this.offset,length:this.length,bytes:m(this.stream,this.offset,this.length),data:this.comment}}}class V extends k{constructor(t){super(t);s(this,"type","PlainTextExtension");s(this,"blockSize",0);s(this,"left",0);s(this,"top",0);s(this,"width",0);s(this,"height",0);s(this,"cellWidth",0);s(this,"cellHeight",0);s(this,"foregroundColorIndex",0);s(this,"backgroundColorIndex",0);s(this,"data",{});this.stream=t}parse({introducer:t,label:e}){this.offset=this.stream.getOffset(),this.blockSize=this.stream.readUint8(),this.left=this.stream.readUint16(),this.top=this.stream.readUint16(),this.width=this.stream.readUint16(),this.height=this.stream.readUint16(),this.cellWidth=this.stream.readUint8(),this.cellHeight=this.stream.readUint8(),this.foregroundColorIndex=this.stream.readUint8(),this.backgroundColorIndex=this.stream.readUint8(),this.data=this.readSubBlocks(),this.length=this.stream.getOffset()-this.offset}export(){return{type:this.type,offset:this.offset,length:this.length,bytes:m(this.stream,this.offset,this.length),data:this.data}}}class N extends k{constructor(t){super(t);s(this,"type","NetscapeExtension");s(this,"offset",0);s(this,"length",0);s(this,"bytes",new Uint8Array(0));s(this,"blockSize",0);s(this,"subblock",0);s(this,"loop",0);s(this,"terminator",0);s(this,"decode","");this.stream=t}parse({introducer:t,label:e}){this.offset=this.stream.getOffset(),this.blockSize=this.stream.readUint8(),this.subblock=this.stream.readUint8(),this.loop=this.stream.readUint16(),this.terminator=this.stream.readInt8(),this.decode=`Loop: ${this.loop>0?this.loop:"forever"}`,this.length=this.stream.getOffset()-this.offset}export(){return{type:this.type,offset:this.offset,length:this.length,bytes:m(this.stream,this.offset,this.length),data:{blockSize:this.blockSize,subblock:this.subblock,loop:this.loop,terminator:this.terminator,decode:this.decode}}}}const x=class{constructor(t){s(this,"buffer",null);t instanceof ArrayBuffer?this.buffer=t:t instanceof Uint8Array?this.buffer=t.buffer:(typeof t=="string"||t instanceof String)&&this.fromDataUri(t)}static dataUriToBuffer(t){let e=atob(t.split(",")[1]),i=e.length,r=new ArrayBuffer(i),a=new Uint8Array(r);for(let f=0;f<i;f++)a[f]=e.charCodeAt(f);return r}static find(t){let e;t instanceof ArrayBuffer?e=t:t instanceof Uint8Array?this.buffer=t.buffer:(typeof t=="string"||t instanceof String)&&(e=x.dataUriToBuffer(t));let i=new DataView(e);if(!e)return;const r="<x:xmpmeta",a=r.length,f=e.byteLength-a,c="x:xmpmeta>",p=c.length,h=e.byteLength-p;let n=2,l=n+a,u=!1;for(;n<f;)if(x.stringFromBuffer(i,n,a)==r){u=!0;break}else n++;if(!u)return console.warn("XMP not found"),null;for(;l<h&&x.stringFromBuffer(i,l,p)!=c;)l++;return l+=p,x.stringFromBuffer(i,n,l-n)}static stringFromBuffer(t,e,i){let r="";for(let a=e;a<e+i;a++)r+=String.fromCharCode(t.getUint8(a));return r}static execFind(t,e){let i=[],r=!0;for(;r;){let a=e.exec(t);a?i.push(a):r=!1}return i}static toTree(t){let e=[];if(!t||!t.length)return e;const i=t.shift(),r=t.findIndex(a=>`</${i.tag}>`===a.raw);return t.splice(r,1),e.push(L(I({},i),{children:x.toTree(t)})),e}static parse(t){if(!t)return null;const e=new RegExp("<[^>]+>","gi"),r=x.execFind(t,e).map((a,f)=>{const c=new RegExp("<(.*?)\\s","g"),p=new RegExp('\\s(.*?)="(.*?)"',"g"),h=a[0],n=c.exec(h),l=x.execFind(h,p);let u={};return l.forEach(w=>{const[,S,E]=w;u[S]=E}),{raw:h,tag:n?n[1]:null,attrs:u}});return x.toTree(r)}fromDataUri(t){this.buffer=x.dataUriToBuffer(t)}find(){return x.find(this.buffer)||""}parse(){let t=this.find();return x.parse(t)}};let U=x;s(U,"buffer",null);class $ extends k{constructor(t){super(t);s(this,"type","XMPDataExtension");s(this,"offset",0);s(this,"length",0);s(this,"bytes",new Uint8Array(0));s(this,"blockSize",0);s(this,"xmpData",[]);this.stream=t}parse({introducer:t,label:e}){this.offset=this.stream.getOffset();const{blocks:i}=this.readSubBlocks();i.forEach(f=>{this.blockSize+=f.length});const r=this.stream.slice(this.offset,this.blockSize);let a=new U(r);this.xmpData=a.parse(),this.length=this.stream.getOffset()-this.offset}export(){return{type:this.type,offset:this.offset,length:this.length,bytes:m(this.stream,this.offset,this.length),data:{blockSize:this.blockSize,xmpData:this.xmpData}}}}class H extends k{constructor(t){super(t);s(this,"type","UnknownApplicationExtension");s(this,"offset",0);s(this,"length",0);s(this,"bytes",new Uint8Array(0));s(this,"appData",{});this.stream=t}parse({introducer:t,label:e}){console.log("introducer, label",t,e),this.offset=this.stream.getOffset(),this.appData=this.readSubBlocks(),this.length=this.stream.getOffset()-this.offset}export(){return{type:this.type,offset:this.offset,length:this.length,bytes:m(this.stream,this.offset,this.length),data:this.appData}}}class W extends k{constructor(t){super(t);s(this,"type","ApplicationExtension");s(this,"offset",0);s(this,"length",0);s(this,"bytes",new Uint8Array(0));s(this,"introducer","");s(this,"label","");s(this,"blockSize",0);s(this,"identifier","");s(this,"authenticationCode","");s(this,"appData");s(this,"netscapeExtension");s(this,"xmpdataExtension");s(this,"unknownApplicationExtension");this.stream=t,this.netscapeExtension=new N(t),this.xmpdataExtension=new $(t),this.unknownApplicationExtension=new H(t),this.appData={}}parse({introducer:t=0,label:e=0}){this.introducer=String.fromCharCode(t),this.label=O(e),this.offset=this.stream.getOffset()-2,this.blockSize=this.stream.readInt8(),this.identifier=this.stream.readString(8),this.authenticationCode=this.stream.readString(3),this.identifier==="NETSCAPE"?(this.netscapeExtension.parse({introducer:t,label:e}),this.appData=this.netscapeExtension.export()):this.identifier==="XMP Data"?(this.xmpdataExtension.parse({introducer:t,label:e}),this.appData=this.xmpdataExtension.export()):(this.unknownApplicationExtension.parse({introducer:t,label:e}),this.appData=this.unknownApplicationExtension.export()),this.length=this.stream.getOffset()-this.offset}export(){return{type:this.type,offset:this.offset,length:this.length,bytes:m(this.stream,this.offset,this.length),data:{introducer:this.introducer,label:this.label,blockSize:this.blockSize,identifier:this.identifier,authenticationCode:this.authenticationCode,appData:this.appData}}}}class j extends k{constructor(t){super(t);s(this,"type","UnknownExtension");s(this,"data",{});this.stream=t}parse({introducer:t,label:e}){this.offset=this.stream.getOffset(),this.data=this.readSubBlocks(),this.length=this.stream.getOffset()-this.offset}export(){return{type:this.type,offset:this.offset,length:this.length,bytes:m(this.stream,this.offset,this.length),data:this.data}}}class X{constructor(t){s(this,"extensionBlock",{});s(this,"graphicsControlExtension");s(this,"plainTextExtension");s(this,"commentExtension");s(this,"applicationExtension");s(this,"unknownExtension");this.stream=t,this.stream=t,this.graphicsControlExtension=new M(t),this.commentExtension=new P(t),this.plainTextExtension=new V(t),this.applicationExtension=new W(t),this.unknownExtension=new j(t)}parse({introducer:t}){const e=this.stream.readUint8();switch(e){case 249:this.graphicsControlExtension.parse({introducer:t,label:e}),this.extensionBlock=this.graphicsControlExtension.export();break;case 254:this.commentExtension.parse({introducer:t,label:e}),this.extensionBlock=this.commentExtension.export();break;case 1:this.plainTextExtension.parse({introducer:t,label:e}),this.extensionBlock=this.plainTextExtension.export();break;case 255:this.applicationExtension.parse({introducer:t,label:e}),this.extensionBlock=this.applicationExtension.export();break;default:this.unknownExtension.parse({introducer:t,label:e}),this.extensionBlock=this.unknownExtension.export();break}}export(){return this.extensionBlock}}class q extends z{constructor(t){super(t,"LocalColorTable")}}class J{constructor(t){s(this,"type","ImageDescriptor");s(this,"offset",0);s(this,"length",0);s(this,"bytes",new Uint8Array(0));s(this,"introducer","");s(this,"left",0);s(this,"top",0);s(this,"width",0);s(this,"height",0);s(this,"packedFields",[]);s(this,"localColorTableFlag",0);s(this,"interlaceFlag",0);s(this,"sortFlag",0);s(this,"reserved",[]);s(this,"localColorTableSize",0);this.stream=t,this.stream=t}hasLocalColorTable(){return!!this.localColorTableFlag}getLocalColorTableSize(){return this.localColorTableSize}parse({introducer:t=0}){this.introducer=String.fromCharCode(t),this.offset=this.stream.getOffset()-1,this.left=this.stream.readUint16(),this.top=this.stream.readUint16(),this.width=this.stream.readUint16(),this.height=this.stream.readUint16(),this.packedFields=T(this.stream.readUint8());const e=[...this.packedFields];this.localColorTableFlag=e.shift()||0,this.interlaceFlag=e.shift()||0,this.sortFlag=e.shift()||0,this.reserved=e.splice(0,2),this.localColorTableSize=b(e.splice(0,3)),this.length=this.stream.getOffset()-this.offset}export(){return{type:this.type,offset:this.offset,length:this.length,bytes:m(this.stream,this.offset,this.length),data:{introducer:this.introducer,left:this.left,top:this.top,width:this.width,height:this.height,packedFields:this.packedFields,localColorTableFlag:this.localColorTableFlag,interlaceFlag:this.interlaceFlag,sortFlag:this.sortFlag,reserved:this.reserved,localColorTableSize:this.localColorTableSize}}}}class K{constructor(t){s(this,"bytes");s(this,"byteOffset");s(this,"bitOffset");s(this,"totalByteOffset");this.bytes=t||new Int8Array,this.byteOffset=0,this.bitOffset=0,this.totalByteOffset=0}readBits(t){let e=0,i=0;for(;i<t;){if(this.byteOffset>=this.bytes.length)throw new Error(`Not enough bytes to read ${t} bits (read ${i} bits)`);const r=Math.min(8-this.bitOffset,t-i),a=255>>8-r<<this.bitOffset;e+=(this.bytes[this.byteOffset]&a)>>this.bitOffset<<i,i+=r,this.bitOffset+=r,this.bitOffset===8&&(this.byteOffset+=1,this.totalByteOffset+=1,this.bitOffset=0)}return e}hasBits(t=1){if(t>12)throw new Error(`Exceeds max bit size: ${t} (max: 12)`);if(this.byteOffset>=this.bytes.length)return!1;const e=8-this.bitOffset;if(t<=e)return!0;const i=this.bytes.length-this.byteOffset-1;return!(i<1||t>e+8*i)}setBytes(t,e=0,i=0){this.bytes=t,this.byteOffset=e,this.bitOffset=i}pushBytes(t){if(this.hasBits()){const e=this.bytes.length-this.byteOffset,i=new Uint8Array(e+t.length);i.set(this.bytes.slice(this.byteOffset)),i.set(t,e),this.bytes=i,this.byteOffset=0}else this.bytes=t,this.byteOffset=0,this.bitOffset=0}getState(){return{bitOffset:this.bitOffset,byteOffset:this.totalByteOffset}}}class Q{constructor(t){s(this,"type","ImageContent");s(this,"offset",0);s(this,"length",0);s(this,"bytes",new Uint8Array(0));s(this,"children",{});this.stream=t,this.stream=t}parse(){this.offset=this.stream.getOffset();const t=this.readImageContent();this.children=this.lzwDecode(t),this.length=this.stream.getOffset()-this.offset}lzwDecode(t){const{blocks:e,lzwMinimumCodeSize:i}=t,r=[],a=[];let f=[],c=[];const p=new K,h=2<<i-1,n=h+1;let l=n,u=i+1,w=(2<<u-1)-1,S=!1;for(const{offset:E,length:tt}of e)for(p.pushBytes(this.stream.slice(E,tt));p.hasBits(u);){const et=p.getState(),C=p.readBits(u);if(C===n){f.push(C);break}else if(C===h){a.push({stream:[],table:[],start:et}),f=a[a.length-1].stream,c=a[a.length-1].table;for(let y=0;y<=n;y++)c[y]=y<h?[y]:[];l=n,u=i+1,w=(2<<u-1)-1,S=!1}else if(!S)r.push(...c[C]),S=!0;else{let y=0;const F=f[f.length-1];C<=l?(r.push(...c[C]),y=c[C][0]):(y=c[F][0],r.push(...c[F],y)),l<4095&&(l+=1,c[l]=[...c[F],y],l===w&&l<4095&&(u+=1,w=(2<<u-1)-1))}f.push(C)}return Object.assign({},t,{indexStream:r,clearCode:h,eoiCode:n,codeUnits:a,blockCount:e.length,codeUnitCount:a.length})}export(){return{type:this.type,offset:this.offset,length:this.length,bytes:m(this.stream,this.offset,this.length),data:this.children}}readImageContent(){const t=this.stream.getOffset(),e=this.stream.readUint8();let{blocks:i}=this.readSubBlocks();const r=this.stream.getOffset()-t;return{offset:t,length:r,type:"image",lzwMinimumCodeSize:e,blocks:i}}readSubBlocks(){const t=this.stream.getOffset();let e=this.stream.readUint8(),i=1;const r=[];for(;e>0;)r.push({offset:t+i,length:e}),i+=e+1,this.stream.seek(e),e=this.stream.readUint8();return i+=1,{blocks:r,blocksLength:i}}}class Y{constructor(t){s(this,"localColorTable");s(this,"imageDescriptor");s(this,"imageContent");this.stream=t,this.stream=t,this.localColorTable=new q(t),this.imageDescriptor=new J(t),this.imageContent=new Q(t)}parse({introducer:t}){if(this.imageDescriptor.parse({introducer:t}),this.imageDescriptor.hasLocalColorTable()){const e=this.imageDescriptor.getLocalColorTableSize();this.localColorTable.parse({size:e})}this.imageContent.parse()}createFrame(t,e,i,r){const a=document.createElement("canvas");a.width=i,a.height=r;const c=a.getContext("2d").createImageData(i,r),p=c.data;for(let h=0,n=0;h<e.length;h+=1,n+=4)p[n+0]=t[e[h]][0],p[n+1]=t[e[h]][1],p[n+2]=t[e[h]][2],p[n+3]=e[h]!==88?255:0;return c}exportFrameData(t){const{width:e,height:i,left:r,top:a,localColorTableFlag:f}=this.imageDescriptor.export().data,{indexStream:c}=this.imageContent.export().data;let p=this.imageDescriptor.hasLocalColorTable()?this.localColorTable.export():t||{};return{type:"Frame",data:{width:e,height:i,left:r,top:a,localColorTableFlag:f,imageData:this.createFrame(p.data,c,e,i)}}}export(){const t=this.imageDescriptor.export(),e=this.imageContent.export();if(!this.imageDescriptor.hasLocalColorTable())return[t,e];const i=this.localColorTable.export();return[t,i,e]}}class Z{constructor(t){s(this,"type","Block");s(this,"offset",0);s(this,"length",0);s(this,"blocks",[]);s(this,"extension");s(this,"imageData");this.stream=t,this.stream=t,this.extension=new X(this.stream),this.imageData=new Y(this.stream)}parse(t){for(this.offset=this.stream.getOffset();this.stream.hasMore();){const e=this.stream.readUint8();switch(String.fromCharCode(e)){case"!":this.extension.parse({introducer:e}),this.blocks.push(this.extension.export());break;case",":this.imageData.parse({introducer:e}),this.blocks.push(...this.imageData.export());break;case";":console.log("end block");break;default:throw new Error("Unknown block: 0x"+e.toString(16))}}this.length=this.stream.getOffset()-this.offset}export(){return this.blocks}}class _{constructor(t){s(this,"parsed");s(this,"blockList");s(this,"dataList");s(this,"stream");s(this,"header");s(this,"logicalScreenDescriptor");s(this,"globalColorTable");s(this,"block");s(this,"isExport",!1);console.log("GifParser init"),this.parsed=!1,this.blockList=[],this.dataList=[],this.stream=new d(t,!0),this.header=new v(this.stream),this.logicalScreenDescriptor=new R(this.stream),this.globalColorTable=new G(this.stream),this.block=new Z(this.stream),this.parse()}parse(){if(!this.parsed){if(this.header.parse(),this.logicalScreenDescriptor.parse(),this.logicalScreenDescriptor.hasGlobalColorTable()){const t=this.logicalScreenDescriptor.getGlobalColorTableSize();this.globalColorTable.parse({size:t})}this.block.parse(this.logicalScreenDescriptor.hasGlobalColorTable()?this.globalColorTable.export():void 0),this.parsed=!0}}getSize(){const{data:t}=this.logicalScreenDescriptor.export();return[t.width,t.height]}export(){this.isExport||(this.blockList.push(this.header.export()),this.blockList.push(this.logicalScreenDescriptor.export()),this.logicalScreenDescriptor.hasGlobalColorTable()&&this.blockList.push(this.globalColorTable.export()),this.blockList.push(...this.block.export()),this.dataHandler(),this.isExport=!0)}exportWarn(){return console.warn.call(this,"parser.export()"),[]}getBlockList(){return this.blockList}getDataList(){return this.isExport?this.dataList:this.exportWarn()}createImageData({colorTable:t,indexStream:e,width:i,height:r,transparency:a}){const f=document.createElement("canvas");f.width=i,f.height=r;const p=f.getContext("2d").createImageData(i,r),h=p.data;for(let n=0,l=0;n<e.length;n+=1,l+=4)e[n]!==a?(h[l+0]=t[e[n]][0],h[l+1]=t[e[n]][1],h[l+2]=t[e[n]][2],h[l+3]=255):(h[l+0]=0,h[l+1]=0,h[l+2]=0,h[l+3]=0);return p}dataHandler(){let t={};const e=this.blockList.find(i=>i.type==="GlobalColorTable");this.blockList.forEach(i=>{if(i.type==="GraphicsControlExtension")t[i.type]=i.data,this.dataList.push(i);else if(i.type==="ImageDescriptor")t[i.type]=i.data,this.dataList.push(i);else if(i.type==="ImageContent"){t[i.type]=i.data,this.dataList.push(i);const{delayTime:r,disposalMethod:a,transparentColorFlag:f,transparentColorIndex:c}=t.GraphicsControlExtension,{localColorTableFlag:p,left:h,top:n,width:l,height:u}=t.ImageDescriptor,{indexStream:w}=t.ImageContent,S=f?c:null,E=p?null:e==null?void 0:e.data;t.Frame={delayTime:r,disposalMethod:a,transparency:S,colorTable:E,indexStream:w,left:h,top:n,width:l,height:u},Object.assign(t.Frame,{imageData:this.createImageData(t.Frame)}),this.dataList.push({type:"Frame",data:t.Frame})}else this.dataList.push(i)})}getFrames(){return this.isExport?this.dataList.filter(t=>t.type==="Frame").map(t=>{const{delayTime:e,transparency:i,left:r,top:a,width:f,height:c,imageData:p}=t.data;return{delayTime:e,transparency:i,left:r,top:a,width:f,height:c,imageData:p}}):this.exportWarn()}getBlockItem(t){const e=this.blockList.find(i=>i.type===t);return e&&e.data}}g.Parser=_,g.loadGif=A,Object.defineProperty(g,"__esModule",{value:!0}),g[Symbol.toStringTag]="Module"});

dist/types/src/parser.d.ts

@@ -51,4 +51,4 @@ import { HeaderExportData } from "./parses/header";
     private dataHandler;
-    getFrames(): FrameData | Array<any>;
+    getFrames(): FramesData;
     getBlockItem(type: ExportBlockItemType): ExportBlockItem;
 }

package.json

@@ -6,3 +6,3 @@ {
   ],
-  "version": "1.0.6",
+  "version": "1.0.7",
   "description": "gif-parser",
@@ -9,0 +9,0 @@ "main": "./dist/gif-parser.umd.js",

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