fabric
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Object model for HTML5 canvas, and SVG-to-canvas parser. Backed by jsdom and node-canvas.
2 lines • 799 B
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{BaseFilter as n}from"./BaseFilter.min.mjs";import{fragmentSource as r}from"./shaders/constrast.min.mjs";var i=class extends n{getFragmentSource(){return r}isNeutralState(){return this.contrast===0}applyTo2d({imageData:{data:e}}){let t=Math.floor(255*this.contrast),n=259*(t+255)/(255*(259-t));for(let t=0;t<e.length;t+=4)e[t]=n*(e[t]-128)+128,e[t+1]=n*(e[t+1]-128)+128,e[t+2]=n*(e[t+2]-128)+128}sendUniformData(e,t){e.uniform1f(t.uContrast,this.contrast)}};e(i,`type`,`Contrast`),e(i,`defaults`,{contrast:0}),e(i,`uniformLocations`,[`uContrast`]),t.setClass(i);export{i as Contrast};
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