squircle.min.js

const drawSquircle=(ctx,geom,radii,smooth,lineWidth,color)=>{const defaultFill=color;const lineWidthOffset=lineWidth/2;ctx.beginPath();ctx.lineTo(radii[0],lineWidthOffset);ctx.lineTo(geom.width-radii[1],lineWidthOffset);ctx.bezierCurveTo(geom.width-radii[1]/smooth,lineWidthOffset,geom.width-lineWidthOffset,radii[1]/smooth,geom.width-lineWidthOffset,radii[1]);ctx.lineTo(geom.width-lineWidthOffset,geom.height-radii[2]);ctx.bezierCurveTo(geom.width-lineWidthOffset,geom.height-radii[2]/smooth,geom.width-radii[2]/smooth,geom.height-lineWidthOffset,geom.width-radii[2],geom.height-lineWidthOffset);ctx.lineTo(radii[3],geom.height-lineWidthOffset);ctx.bezierCurveTo(radii[3]/smooth,geom.height-lineWidthOffset,lineWidthOffset,geom.height-radii[3]/smooth,lineWidthOffset,geom.height-radii[3]);ctx.lineTo(lineWidthOffset,radii[0]);ctx.bezierCurveTo(lineWidthOffset,radii[0]/smooth,radii[0]/smooth,lineWidthOffset,radii[0],lineWidthOffset);ctx.closePath();if(lineWidth){ctx.strokeStyle=defaultFill;ctx.lineWidth=lineWidth;ctx.stroke()}else{ctx.fillStyle=defaultFill;ctx.fill()}};class SquircleClass{static get contextOptions(){return{alpha:true}}static get inputProperties(){return["--squircle-radius","--squircle-radius-top-left","--squircle-radius-top-right","--squircle-radius-bottom-right","--squircle-radius-bottom-left","--squircle-smooth","--squircle-outline","--squircle-fill"]}paint(ctx,geom,properties){const smoothRatio=10;const distanceRatio=1.8;const squircleSmooth=parseFloat(properties.get("--squircle-smooth")*smoothRatio);const individualRadiiProps=SquircleClass.inputProperties.slice(1,5);let squircleRadii=individualRadiiProps.map(prop=>{const value=properties.get(prop);return value?parseInt(value,10)*distanceRatio:NaN});let shorthand_R;if(squircleRadii.some(isNaN)){const radiusRegex=/([0-9]+[a-z%]*)/g;const radius_shorthand=properties.get("--squircle-radius").toString();const matches=radius_shorthand.match(radiusRegex);if(matches){shorthand_R=matches.map(val=>parseInt(val,10)*distanceRatio);while(shorthand_R.length<4){if(shorthand_R.length===1){shorthand_R.push(shorthand_R[0])}else if(shorthand_R.length===2){shorthand_R=[shorthand_R[0],shorthand_R[1],shorthand_R[0],shorthand_R[1]]}else if(shorthand_R.length===3){shorthand_R=[shorthand_R[0],shorthand_R[1],shorthand_R[2],shorthand_R[1]]}}}else{const defaultRadius=squircleRadii.every(isNaN)?8*distanceRatio:0;shorthand_R=[defaultRadius,defaultRadius,defaultRadius,defaultRadius]}}squircleRadii=squircleRadii.map((val,i)=>isNaN(val)?shorthand_R[i]:val);const squrcleOutline=parseFloat(properties.get("--squircle-outline"),10);const squrcleColor=properties.get("--squircle-fill").toString();const isSmooth=()=>{if(typeof properties.get("--squircle-smooth")[0]!=="undefined"){if(squircleSmooth===0){return 1}return squircleSmooth}else{return 10}};const isOutline=()=>{if(squrcleOutline){return squrcleOutline}else{return 0}};const isColor=()=>{if(squrcleColor){return squrcleColor}else{return"#f45"}};const maxRadius=Math.max(...squircleRadii);if(maxRadius<geom.width/2&&maxRadius<geom.height/2){drawSquircle(ctx,geom,squircleRadii,isSmooth(),isOutline(),isColor())}else{const minRadius=Math.min(geom.width/2,geom.height/2);drawSquircle(ctx,geom,squircleRadii.map(()=>minRadius),isSmooth(),isOutline(),isColor())}}}if(typeof registerPaint!=="undefined"){registerPaint("squircle",SquircleClass)}