{"name":"Noise","title":"Noise","description":"Animated film grain / noise overlay adding subtle texture and motion.","type":"registry:component","add":"when-added","files":[{"type":"registry:component","role":"file","content":"<template>\n  <canvas\n    ref=\"grainRef\"\n    class=\"pointer-events-none absolute top-0 left-0 h-screen w-screen\"\n    :style=\"`image-rendering: pixelated; mix-blend-mode: ${props.mixBlendMode}`\"\n  ></canvas>\n</template>\n\n<script setup lang=\"ts\">\nimport { onMounted, onBeforeUnmount, useTemplateRef } from 'vue';\n\ninterface NoiseProps {\n  patternRefreshInterval?: number;\n  patternAlpha?: number;\n  mixBlendMode?: string;\n}\n\nconst props = withDefaults(defineProps<NoiseProps>(), {\n  patternRefreshInterval: 2,\n  patternAlpha: 10,\n  mixBlendMode: 'normal'\n});\n\nconst grainRef = useTemplateRef<HTMLCanvasElement>('grainRef');\n\nlet animationId = 0;\nlet frame = 0;\nconst canvasSize = 1024;\n\nconst resize = () => {\n  const canvas = grainRef.value;\n  if (!canvas) return;\n  canvas.width = canvasSize;\n  canvas.height = canvasSize;\n  canvas.style.width = '100vw';\n  canvas.style.height = '100vh';\n};\n\nlet noiseData: ImageData;\nlet noise32: Uint32Array;\n\nconst initImageData = (ctx: CanvasRenderingContext2D) => {\n  noiseData = ctx.createImageData(canvasSize, canvasSize);\n  noise32 = new Uint32Array(noiseData.data.buffer);\n};\n\nconst drawGrain = () => {\n  const a = props.patternAlpha << 24;\n  for (let i = 0; i < noise32.length; i++) {\n    const v = (Math.random() * 255) | 0;\n    noise32[i] = a | (v << 16) | (v << 8) | v;\n  }\n};\n\nconst loop = (ctx: CanvasRenderingContext2D) => {\n  if (frame % Math.max(1, Math.round(props.patternRefreshInterval)) === 0) {\n    drawGrain();\n    ctx.putImageData(noiseData, 0, 0);\n  }\n  frame++;\n  animationId = requestAnimationFrame(() => loop(ctx));\n};\n\nonMounted(() => {\n  const canvas = grainRef.value;\n  if (!canvas) return;\n  const ctx = canvas.getContext('2d', { alpha: true });\n  if (!ctx) return;\n\n  resize();\n  initImageData(ctx);\n  drawGrain();\n  ctx.putImageData(noiseData, 0, 0);\n  loop(ctx);\n\n  window.addEventListener('resize', resize);\n});\n\nonBeforeUnmount(() => {\n  window.removeEventListener('resize', resize);\n  cancelAnimationFrame(animationId);\n});\n</script>\n","path":"Noise/Noise.vue","_imports_":[],"registryDependencies":[],"dependencies":[],"devDependencies":[]}],"registryDependencies":[],"dependencies":[],"devDependencies":[],"categories":["Animations"]}