fabric
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Object model for HTML5 canvas, and SVG-to-canvas parser. Backed by jsdom and node-canvas.
2 lines • 1.83 kB
JavaScript
import{_defineProperty as e}from"../../_virtual/_@oxc-project_runtime@0.122.0/helpers/defineProperty.min.mjs";import{classRegistry as t}from"../ClassRegistry.min.mjs";import{isWebGLPipelineState as n}from"./utils.min.mjs";import{BaseFilter as r}from"./BaseFilter.min.mjs";import{fragmentSource as i}from"./shaders/blur.min.mjs";var a=class extends r{getFragmentSource(){return i}applyTo(e){n(e)?(this.aspectRatio=e.sourceWidth/e.sourceHeight,e.passes++,this._setupFrameBuffer(e),this.horizontal=!0,this.applyToWebGL(e),this._swapTextures(e),this._setupFrameBuffer(e),this.horizontal=!1,this.applyToWebGL(e),this._swapTextures(e)):this.applyTo2d(e)}applyTo2d({imageData:{data:e,width:t,height:n}}){this.aspectRatio=t/n,this.horizontal=!0;let r=this.getBlurValue()*t,i=new Uint8ClampedArray(e),a=4*t;for(let t=0;t<e.length;t+=4){let n=0,o=0,s=0,c=0,l=0,u=t-t%a,d=u+a;for(let i=-14;i<15;i++){let a=i/15,f=4*Math.floor(r*a),p=1-Math.abs(a),m=t+f;m<u?m=u:m>d&&(m=d);let h=e[m+3]*p;n+=e[m]*h,o+=e[m+1]*h,s+=e[m+2]*h,c+=h,l+=p}i[t]=n/c,i[t+1]=o/c,i[t+2]=s/c,i[t+3]=c/l}this.horizontal=!1,r=this.getBlurValue()*n;for(let t=0;t<i.length;t+=4){let n=0,o=0,s=0,c=0,l=0,u=t%a,d=i.length-a+u;for(let e=-14;e<15;e++){let f=e/15,p=Math.floor(r*f)*a,m=1-Math.abs(f),h=t+p;h<u?h=u:h>d&&(h=d);let g=i[h+3]*m;n+=i[h]*g,o+=i[h+1]*g,s+=i[h+2]*g,c+=g,l+=m}e[t]=n/c,e[t+1]=o/c,e[t+2]=s/c,e[t+3]=c/l}}sendUniformData(e,t){let n=this.chooseRightDelta();e.uniform2fv(t.uDelta,n)}isNeutralState(){return this.blur===0}getBlurValue(){let e=1,{horizontal:t,aspectRatio:n}=this;return t?n>1&&(e=1/n):n<1&&(e=n),e*this.blur*.12}chooseRightDelta(){let e=this.getBlurValue();return this.horizontal?[e,0]:[0,e]}};e(a,`type`,`Blur`),e(a,`defaults`,{blur:0}),e(a,`uniformLocations`,[`uDelta`]),t.setClass(a);export{a as Blur};
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