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pica

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High quality image resize in browser.

github.com/nodeca/pica

nodeca/pica

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/*! pica https://github.com/nodeca/pica */ !function(A,t){"object"==typeof exports&&"undefined"!=typeof module?module.exports=t():"function"==typeof define&&define.amd?define([],t):(A="undefined"!=typeof globalThis?globalThis:A||self).pica=t()}(this,function(){var A;function t(A){const t=A.replace(/[\r\n=]/g,""),e=t.length,i=new Uint8Array(3*e>>2);let n=0,a=0;for(let s=0;s<e;s++)s%4==0&&s&&(i[a++]=n>>16&255,i[a++]=n>>8&255,i[a++]=255&n),n=n<<6|"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/".indexOf(t.charAt(s));const r=e%4*6;return 0===r?(i[a++]=n>>16&255,i[a++]=n>>8&255,i[a++]=255&n):18===r?(i[a++]=n>>10&255,i[a++]=n>>2&255):12===r&&(i[a++]=n>>4&255),i}var e={js:!0,wasm:!0},i=class{constructor(A){const t=Object.assign({},e,A||{});if(this.options=t,this.__cache={},this.__init_promise=null,this.__modules=t.modules||{},this.__memory=null,this.__wasm={},this.__isLE=1===new Uint32Array(new Uint8Array([1,0,0,0]).buffer)[0],!this.options.js&&!this.options.wasm)throw new 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extends n{constructor(A){const t=A||[],e={js:t.indexOf("js")>=0,wasm:t.indexOf("wasm")>=0};super(e),this.features={js:e.js,wasm:e.wasm&&this.has_wasm()},this.use(r),this.use(E)}resizeAndUnsharp(A){const t=this.resize(A);return A.unsharpAmount&&this.unsharp_mask(t,A.toWidth,A.toHeight,A.unsharpAmount,A.unsharpRadius,A.unsharpThreshold),t}},c="/9j/4QAiRXhpZgAATU0AKgAAAAgAAQESAAMAAAABAAYAAAAAAAD/4AAQskZJRgABAQAAAQABAAD/2wBDAAMCAgICAgMCAgIDAwMDBAYEBAQEBAgGBgUGCQgKCgkICQkKDA8MCgsOCwkJDRENDg8QEBEQCgwSExIQEw8QEBD/wAALCAACAAMBAREA/8QAFAABAAAAAAAAAAAAAAAAAAAACf/EABsQAAMBAQADAAAAAAAAAAAAAAECAwQFABEx/9oACAEBAAA/AC06fW6va0ps7PT179E88MiV02arrCEkjGQZiSEnKc5ovxURVHoADz//2Q==",f={canvas:!1,offscreen_canvas:!1,may_be_worker:!1,create_image_bitmap:!1,safari_put_image_data_fix:!1,bug_canvas_orientation_region:!0,bug_image_bitmap_orientation_region:!0,cib_resize:!1},u=!1,m=null;function d(){if("undefined"==typeof document||!document.createElement)return!1;try{const A=document.createElement("canvas");A.width=2,A.height=1;const t=A.getContext("2d");let e=t.createImageData(2,1);return e.data[0]=12,e.data[1]=23,e.data[2]=34,e.data[3]=255,e.data[4]=45,e.data[5]=56,e.data[6]=67,e.data[7]=255,t.putImageData(e,0,0),e=t.getImageData(0,0,2,1),12===e.data[0]&&23===e.data[1]&&34===e.data[2]&&255===e.data[3]&&45===e.data[4]&&56===e.data[5]&&67===e.data[6]&&255===e.data[7]}catch(p){return!1}}function w(){if("undefined"==typeof OffscreenCanvas)return!1;try{const A=new OffscreenCanvas(2,1).getContext("2d");let t=A.createImageData(2,1);return t.data[0]=12,t.data[1]=23,t.data[2]=34,t.data[3]=255,t.data[4]=45,t.data[5]=56,t.data[6]=67,t.data[7]=255,A.putImageData(t,0,0),t=A.getImageData(0,0,2,1),12===t.data[0]&&23===t.data[1]&&34===t.data[2]&&255===t.data[3]&&45===t.data[4]&&56===t.data[5]&&67===t.data[6]&&255===t.data[7]}catch(p){return!1}}function l(){return"undefined"!=typeof createImageBitmap}function y(){if(u)return Promise.resolve(Object.assign({},f));if(m)return m.then(()=>Object.assign({},f));f.canvas=d(),f.offscreen_canvas=w(),f.may_be_worker="undefined"!=typeof Worker&&"undefined"!=typeof URL&&!!URL.createObjectURL,f.create_image_bitmap=l(),f.safari_put_image_data_fix=function(){try{return!!("undefined"!=typeof navigator&&navigator.userAgent&&navigator.userAgent.indexOf("Safari")>=0&&navigator.userAgent.indexOf("Chrome")<0)}catch(p){return!1}}();const A=Promise.resolve().then(()=>{if(w()&&l()&&"undefined"!=typeof Blob&&"undefined"!=typeof atob){const A=atob(c),t=new Uint8Array(A.length);for(let e=0;e<A.length;e++)t[e]=A.charCodeAt(e);return createImageBitmap(new Blob([t],{type:"image/jpeg"})).then(A=>{const t=new OffscreenCanvas(1,1);try{const e=t.getContext("2d");return e.drawImage(A,1,1,1,1,0,0,1,1),e.getImageData(0,0,1,1).data[0]<240}finally{A.close()}})}return!d()||"undefined"==typeof Image||new Promise(A=>{const t=new Image;t.onload=()=>{try{const e=document.createElement("canvas");e.width=1,e.height=1;const n=e.getContext("2d");n.drawImage(t,1,1,1,1,0,0,1,1),A(n.getImageData(0,0,1,1).data[0]<240)}catch(p){A(!0)}},t.onerror=()=>A(!0),t.src=`data:image/jpeg;base64,${c}`})}).catch(()=>!0).then(A=>{f.bug_canvas_orientation_region=A}).catch(()=>{}),t=Promise.resolve().then(()=>{if(!f.create_image_bitmap&&!l())return!0;if("undefined"==typeof Blob||"undefined"==typeof atob)return!0;const A=w(),t=d();if(!A&&!t)return!0;const e=atob(c),n=new Uint8Array(e.length);for(let a=0;a<e.length;a++)n[a]=e.charCodeAt(a);return createImageBitmap(new Blob([n],{type:"image/jpeg"})).then(t=>createImageBitmap(t,1,1,1,1).then(e=>{let n;A?n=new OffscreenCanvas(1,1):(n=document.createElement("canvas"),n.width=1,n.height=1);try{const A=n.getContext("2d");return A.drawImage(e,0,0),1!==e.width||1!==e.height||A.getImageData(0,0,1,1).data[0]<240}finally{t.close(),e.close()}},()=>(t.close(),!0)))}).catch(()=>!0).then(A=>{f.bug_image_bitmap_orientation_region=A}).catch(()=>{}),e=Promise.resolve().then(()=>{if(!l())return!1;const A=20;let t;if(f.canvas||d())t=document.createElement("canvas"),t.width=A,t.height=A;else{if(!f.offscreen_canvas&&!w())return!1;t=new OffscreenCanvas(A,A),t.getContext("2d").clearRect(0,0,A,A)}return createImageBitmap(t,0,0,A,A,{resizeWidth:5,resizeHeight:5,resizeQuality:"high"}).then(A=>{const e=5===A.width&&!!A.close;return A.close&&A.close(),t=null,e})}).catch(()=>!1).then(A=>{f.cib_resize=A}).catch(()=>{});return m=Promise.all([A,t,e]).then(()=>(u=!0,m=null,Object.assign({},f)),A=>{throw m=null,A})}var _=self,b=null;function D(A,t){return b||(b=new C(A.features)),b.resizeAndUnsharp(t)}function M(A){if("bitmap"===A.job.kind)return void function(A,t){let e=new OffscreenCanvas(t.width,t.height);const n=e.getContext("2d");n.drawImage(t.src,0,0);const a=n.getImageData(0,0,t.width,t.height).data;e.width=e.height=0,e=null,t.src.close();const i=D(A,{src:a,width:t.width,height:t.height,toWidth:t.toWidth,toHeight:t.toHeight,scaleX:t.scaleX,scaleY:t.scaleY,offsetX:t.offsetX,offsetY:t.offsetY,filter:t.filter,unsharpAmount:t.unsharpAmount,unsharpRadius:t.unsharpRadius,unsharpThreshold:t.unsharpThreshold}),r=new OffscreenCanvas(t.toWidth,t.toHeight),s=r.getContext("2d"),o=s.createImageData(t.toWidth,t.toHeight);o.data.set(i),s.putImageData(o,0,0);const g=r.transferToImageBitmap();_.postMessage({kind:"bitmap",data:g},[g])}(A,A.job);const t=D(A,A.job);_.postMessage({kind:"array",data:t},[t.buffer])}_.onmessage=function(A){Promise.resolve().then(()=>function(A){switch(A.method){case"get_supported_features":return y().then(A=>{_.postMessage({data:A})});case"resize":return M(A),Promise.resolve();default:return Promise.reject(new Error(`Unknown worker method: ${A.method}`))}}(A.data)).catch(A=>{_.postMessage({err:A})})}}();\n//# sourceURL=pica-inline-worker.js',P=1;"undefined"!=typeof navigator&&(P=Math.min(navigator.hardwareConcurrency||1,4));var K={tile:1024,concurrency:P,features:["js","wasm","ww"],idle:2e3},Z={filter:"mks2013",unsharpAmount:0,unsharpRadius:0,unsharpThreshold:0},N=class{constructor(A){Q(this,"options",void 0),Q(this,"__limit",void 0),Q(this,"resize_features",void 0),Q(this,"__workersPool",void 0),Q(this,"capabilities",void 0),Q(this,"__requested_features",void 0),Q(this,"__mathlib",void 0),Q(this,"__initPromise",void 0),this.options=Object.assign({},K,A||{}),(this.options.features.indexOf("ww")>=0||this.options.features.indexOf("all")>=0)&&this.options.workerURL,this.__limit=function(A){let t=0;const e=[];function i(){var i;t<A&&e.length&&(t++,null===(i=e.shift())||void 0===i||i())}return function(A){return new Promise((n,a)=>{e.push(()=>{A().then(A=>{n(A),t--,i()},A=>{a(A),t--,i()})}),i()})}}(this.options.concurrency),this.resize_features={js:!1,wasm:!1,cib:!1,ww:!1},this.__workersPool=null,this.capabilities={worker:!1,ww_offscreen_canvas:!1,canvas:!1,offscreen_canvas:!1,may_be_worker:!1,create_image_bitmap:!1,safari_put_image_data_fix:!1,bug_canvas_orientation_region:!0,bug_image_bitmap_orientation_region:!0,cib_resize:!1},this.__requested_features=[],this.__mathlib=null}init(){return this.__initPromise||(this.__initPromise=this.__init()),this.__initPromise}__init(){var A=this;return J(function*(){let t=A.options.features.slice();t.indexOf("all")>=0&&(t=["cib","wasm","js","ww"]),A.__requested_features=t,A.__mathlib=new B(t);const e=yield Y();if(Object.assign(A.capabilities,e),A.capabilities.cib_resize&&t.indexOf("cib")>=0&&(A.resize_features.cib=!0),A.capabilities.may_be_worker&&t.indexOf("ww")>=0&&q&&(A.__workersPool=new m(()=>A.__createWorkerSlot(),A.options.idle)),A.__workersPool)try{const t=yield A.__invokeWorker("get_supported_features"),e=t&&t.data;e&&(A.capabilities.worker=!0,A.resize_features.ww=!0,A.capabilities.ww_offscreen_canvas=!!e.offscreen_canvas)}catch(z){}const i=yield A.__mathlib.init();return Object.assign(A.resize_features,i.features),A})()}createCanvas(A,t,e){if(e&&this.capabilities.offscreen_canvas)return new OffscreenCanvas(A,t);if(this.capabilities.canvas){const e=document.createElement("canvas");return e.width=A,e.height=t,e}if(this.capabilities.ww_offscreen_canvas)return new OffscreenCanvas(A,t);throw new Error("Pica: cannot create canvas")}__createWorkerSlot(){if(this.options.workerURL){const A=new Worker(String(this.options.workerURL));return{value:A,destroy(){A.terminate()}}}{const A=window.URL.createObjectURL(new Blob([q],{type:"text/javascript"})),t=new Worker(A);return{value:t,destroy(){var e,i;(t.terminate(),"undefined"!=typeof window)&&(null===(e=window.URL)||void 0===e||null===(i=e.revokeObjectURL)||void 0===i||i.call(e,A))}}}}__invokeWorker(A,t,e,i){return new Promise((n,a)=>{const r=this.__workersPool.acquire();i&&i.cancelToken&&i.cancelToken.catch(A=>a(A)),r.value.onmessage=A=>{r.release(),A.data.err?a(A.data.err):n(A.data)},r.value.postMessage(Object.assign({method:A},t||{}),e||[])})}__invokeResize(A,t){var e=this;return J(function*(){if(yield Promise.resolve(),!e.resize_features.ww){if("array"!==A.kind)throw new Error("Pica: resize tile data is missing");const t={src:A.src,width:A.width,height:A.height,toWidth:A.toWidth,toHeight:A.toHeight,scaleX:A.scaleX,scaleY:A.scaleY,offsetX:A.offsetX,offsetY:A.offsetY,filter:A.filter,unsharpAmount:A.unsharpAmount,unsharpRadius:A.unsharpRadius,unsharpThreshold:A.unsharpThreshold};return{kind:"array",data:e.__mathlib.resizeAndUnsharp(t)}}const i=[];return"array"===A.kind?i.push(A.src.buffer):i.push(A.src),e.__invokeWorker("resize",{job:A,features:e.__requested_features},i,t)})()}__extractTileData(A,t,e,i){if(this.resize_features.ww&&this.capabilities.ww_offscreen_canvas){this.debug("Create tile imageBitmap");const n=this.createCanvas(A.width,A.height,{preferOffscreen:!0});if(n.getContext("2d").drawImage(e.srcImageBitmap||t,A.x,A.y,A.width,A.height,0,0,A.width,A.height),!("transferToImageBitmap"in n))throw new Error("Pica: offscreen canvas is not available for worker transfer");return Object.assign({},i,{kind:"bitmap",src:n.transferToImageBitmap()})}if(_(t))return e.srcCtx||(e.srcCtx=t.getContext("2d")),this.debug("Get tile pixel data"),Object.assign({},i,{kind:"array",src:e.srcCtx.getImageData(A.x,A.y,A.width,A.height).data});this.debug("Draw tile imageBitmap/image to temporary canvas");const n=this.createCanvas(A.width,A.height,{preferOffscreen:!0}),a=n.getContext("2d");a.globalCompositeOperation="copy",a.drawImage(e.srcImageBitmap||t,A.x,A.y,A.width,A.height,0,0,A.width,A.height),this.debug("Get tile pixel data");const r=a.getImageData(0,0,A.width,A.height).data;return n.width=n.height=0,Object.assign({},i,{kind:"array",src:r})}__landTileData(A,t,e){if("bitmap"===t.kind)return e.toCtx.drawImage(t.data,A.toX,A.toY),t.data.close(),null;this.debug("Draw tile");const i=e.toCtx.createImageData(A.toWidth,A.toHeight);return i.data.set(t.data),this.capabilities.safari_put_image_data_fix?e.toCtx.putImageData(i,A.toX,A.toY,A.toInnerX-A.toX,A.toInnerY-A.toY,A.toInnerWidth+1e-5,A.toInnerHeight+1e-5):e.toCtx.putImageData(i,A.toX,A.toY,A.toInnerX-A.toX,A.toInnerY-A.toY,A.toInnerWidth,A.toInnerHeight),null}__tileAndResize(A,t,e,i){var n=this;return J(function*(){const a={srcCtx:null,srcImageBitmap:null,isImageBitmapReused:!1,toCtx:null};if(yield Promise.resolve(),a.toCtx=t.getContext("2d"),_(A));else if(y(A))a.srcImageBitmap=A,a.isImageBitmapReused=!0;else{if(!b(A))throw new Error('Pica: ".from" should be Image, Canvas or ImageBitmap');if(n.capabilities.create_image_bitmap){n.debug("Decode image via createImageBitmap");try{a.srcImageBitmap=yield createImageBitmap(A)}catch(z){}}}if(i.canceled)return i.cancelToken;n.debug("Calculate tiles");const r=function(A){const t=A.toWidth/A.width,e=A.toHeight/A.height,i=U(A.srcTileSize*t)-2*A.destTileBorder,n=U(A.srcTileSize*e)-2*A.destTileBorder;if(i<1||n<1)throw new Error("Internal error in pica: target tile width/height is too small.");let a,r,s,o,g,h;const c=[];let I;for(o=0;o<A.toHeight;o+=n)for(s=0;s<A.toWidth;s+=i)a=s-A.destTileBorder,a<0&&(a=0),g=s+i+A.destTileBorder-a,a+g>=A.toWidth&&(g=A.toWidth-a),r=o-A.destTileBorder,r<0&&(r=0),h=o+n+A.destTileBorder-r,r+h>=A.toHeight&&(h=A.toHeight-r),I={toX:a,toY:r,toWidth:g,toHeight:h,toInnerX:s,toInnerY:o,toInnerWidth:i,toInnerHeight:n,offsetX:a/t-U(a/t),offsetY:r/e-U(r/e),scaleX:t,scaleY:e,x:U(a/t),y:U(r/e),width:R(g/t),height:R(h/e)},c.push(I);return c}({width:e.width,height:e.height,srcTileSize:n.options.tile,toWidth:e.toWidth,toHeight:e.toHeight,destTileBorder:Math.ceil(Math.max(3,2.5*e.unsharpRadius|0))}).map(t=>(t=>n.__limit(J(function*(){if(i.canceled)return i.cancelToken;const r={width:t.width,height:t.height,toWidth:t.toWidth,toHeight:t.toHeight,scaleX:t.scaleX,scaleY:t.scaleY,offsetX:t.offsetX,offsetY:t.offsetY,filter:e.filter,unsharpAmount:e.unsharpAmount,unsharpRadius:e.unsharpRadius,unsharpThreshold:e.unsharpThreshold};n.debug("Invoke resize math");const s=yield n.__extractTileData(t,A,a,r);n.debug("Invoke resize math");const o=yield n.__invokeResize(s,i);return i.canceled?i.cancelToken:n.__landTileData(t,o,a)})))(t));function s(A){A.srcImageBitmap&&(A.isImageBitmapReused||A.srcImageBitmap.close(),A.srcImageBitmap=null)}n.debug("Process tiles");try{return yield Promise.all(r),n.debug("Finished!"),s(a),t}catch(o){throw s(a),o}})()}__planStagesAndResize(A,t,e,i){var n=this;return J(function*(){let a=A,r=e.width,s=e.height;const o=function(A,t,e,i,n){const a=e/A,r=i/t,s=9/n;if(s>.5)return[[e,i]];const o=Math.ceil(Math.log(Math.min(a,r))/Math.log(s));if(o<=1)return[[