[ FEAT ] : 🎉 New <Grainient /> Background

src/content/Backgrounds/Grainient/Grainient.vue

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+<script setup lang="ts">
+import { Mesh, Program, Renderer, Triangle } from 'ogl';
+import { onBeforeUnmount, onMounted, useTemplateRef, watch } from 'vue';
+
+interface GrainientProps {
+  timeSpeed?: number;
+  colorBalance?: number;
+  warpStrength?: number;
+  warpFrequency?: number;
+  warpSpeed?: number;
+  warpAmplitude?: number;
+  blendAngle?: number;
+  blendSoftness?: number;
+  rotationAmount?: number;
+  noiseScale?: number;
+  grainAmount?: number;
+  grainScale?: number;
+  grainAnimated?: boolean;
+  contrast?: number;
+  gamma?: number;
+  saturation?: number;
+  centerX?: number;
+  centerY?: number;
+  zoom?: number;
+  color1?: string;
+  color2?: string;
+  color3?: string;
+  className?: string;
+}
+
+const hexToRgb = (hex: string): [number, number, number] => {
+  const result = /^#?([a-f\d]{2})([a-f\d]{2})([a-f\d]{2})$/i.exec(hex);
+  if (!result) return [1, 1, 1];
+  return [parseInt(result[1], 16) / 255, parseInt(result[2], 16) / 255, parseInt(result[3], 16) / 255];
+};
+
+const vertex = `#version 300 es
+in vec2 position;
+void main() {
+  gl_Position = vec4(position, 0.0, 1.0);
+}
+`;
+
+const fragment = `#version 300 es
+precision highp float;
+uniform vec2 iResolution;
+uniform float iTime;
+uniform float uTimeSpeed;
+uniform float uColorBalance;
+uniform float uWarpStrength;
+uniform float uWarpFrequency;
+uniform float uWarpSpeed;
+uniform float uWarpAmplitude;
+uniform float uBlendAngle;
+uniform float uBlendSoftness;
+uniform float uRotationAmount;
+uniform float uNoiseScale;
+uniform float uGrainAmount;
+uniform float uGrainScale;
+uniform float uGrainAnimated;
+uniform float uContrast;
+uniform float uGamma;
+uniform float uSaturation;
+uniform vec2 uCenterOffset;
+uniform float uZoom;
+uniform vec3 uColor1;
+uniform vec3 uColor2;
+uniform vec3 uColor3;
+out vec4 fragColor;
+#define S(a,b,t) smoothstep(a,b,t)
+mat2 Rot(float a){float s=sin(a),c=cos(a);return mat2(c,-s,s,c);} 
+vec2 hash(vec2 p){p=vec2(dot(p,vec2(2127.1,81.17)),dot(p,vec2(1269.5,283.37)));return fract(sin(p)*43758.5453);} 
+float noise(vec2 p){vec2 i=floor(p),f=fract(p),u=f*f*(3.0-2.0*f);float n=mix(mix(dot(-1.0+2.0*hash(i+vec2(0.0,0.0)),f-vec2(0.0,0.0)),dot(-1.0+2.0*hash(i+vec2(1.0,0.0)),f-vec2(1.0,0.0)),u.x),mix(dot(-1.0+2.0*hash(i+vec2(0.0,1.0)),f-vec2(0.0,1.0)),dot(-1.0+2.0*hash(i+vec2(1.0,1.0)),f-vec2(1.0,1.0)),u.x),u.y);return 0.5+0.5*n;}
+void mainImage(out vec4 o, vec2 C){
+  float t=iTime*uTimeSpeed;
+  vec2 uv=C/iResolution.xy;
+  float ratio=iResolution.x/iResolution.y;
+  vec2 tuv=uv-0.5+uCenterOffset;
+  tuv/=max(uZoom,0.001);
+
+  float degree=noise(vec2(t*0.1,tuv.x*tuv.y)*uNoiseScale);
+  tuv.y*=1.0/ratio;
+  tuv*=Rot(radians((degree-0.5)*uRotationAmount+180.0));
+  tuv.y*=ratio;
+
+    float frequency=uWarpFrequency;
+  float ws=max(uWarpStrength,0.001);
+  float amplitude=uWarpAmplitude/ws;
+  float warpTime=t*uWarpSpeed;
+  tuv.x+=sin(tuv.y*frequency+warpTime)/amplitude;
+  tuv.y+=sin(tuv.x*(frequency*1.5)+warpTime)/(amplitude*0.5);
+
+  vec3 colLav=uColor1;
+  vec3 colOrg=uColor2;
+  vec3 colDark=uColor3;
+  float b=uColorBalance;
+  float s=max(uBlendSoftness,0.0);
+  mat2 blendRot=Rot(radians(uBlendAngle));
+  float blendX=(tuv*blendRot).x;
+  float edge0=-0.3-b-s;
+  float edge1=0.2-b+s;
+  float v0=0.5-b+s;
+  float v1=-0.3-b-s;
+  vec3 layer1=mix(colDark,colOrg,S(edge0,edge1,blendX));
+  vec3 layer2=mix(colOrg,colLav,S(edge0,edge1,blendX));
+  vec3 col=mix(layer1,layer2,S(v0,v1,tuv.y));
+
+  vec2 grainUv=uv*max(uGrainScale,0.001);
+  if(uGrainAnimated>0.5){grainUv+=vec2(iTime*0.05);} 
+  float grain=fract(sin(dot(grainUv,vec2(12.9898,78.233)))*43758.5453);
+  col+=(grain-0.5)*uGrainAmount;
+
+  col=(col-0.5)*uContrast+0.5;
+  float luma=dot(col,vec3(0.2126,0.7152,0.0722));
+  col=mix(vec3(luma),col,uSaturation);
+  col=pow(max(col,0.0),vec3(1.0/max(uGamma,0.001)));
+  col=clamp(col,0.0,1.0);
+
+  o=vec4(col,1.0);
+}
+void main(){
+  vec4 o=vec4(0.0);
+  mainImage(o,gl_FragCoord.xy);
+  fragColor=o;
+}
+`;
+
+const props = withDefaults(defineProps<GrainientProps>(), {
+  timeSpeed: 0.25,
+  colorBalance: 0.0,
+  warpStrength: 1.0,
+  warpFrequency: 5.0,
+  warpSpeed: 2.0,
+  warpAmplitude: 50.0,
+  blendAngle: 0.0,
+  blendSoftness: 0.05,
+  rotationAmount: 500.0,
+  noiseScale: 2.0,
+  grainAmount: 0.1,
+  grainScale: 2.0,
+  grainAnimated: false,
+  contrast: 1.5,
+  gamma: 1.0,
+  saturation: 1.0,
+  centerX: 0.0,
+  centerY: 0.0,
+  zoom: 0.9,
+  color1: '#FF9FFC',
+  color2: '#5227FF',
+  color3: '#B19EEF',
+  className: ''
+});
+
+const containerRef = useTemplateRef<HTMLDivElement>('containerRef');
+
+let cleanup: (() => void) | null = null;
+const setup = () => {
+  if (!containerRef.value) return;
+
+  const renderer = new Renderer({
+    webgl: 2,
+    alpha: true,
+    antialias: false,
+    dpr: Math.min(window.devicePixelRatio || 1, 2)
+  });
+
+  const gl = renderer.gl;
+  const canvas = gl.canvas as HTMLCanvasElement;
+  canvas.style.width = '100%';
+  canvas.style.height = '100%';
+  canvas.style.display = 'block';
+
+  const container = containerRef.value;
+  container.appendChild(canvas);
+
+  const geometry = new Triangle(gl);
+  const program = new Program(gl, {
+    vertex,
+    fragment,
+    uniforms: {
+      iTime: { value: 0 },
+      iResolution: { value: new Float32Array([1, 1]) },
+      uTimeSpeed: { value: props.timeSpeed },
+      uColorBalance: { value: props.colorBalance },
+      uWarpStrength: { value: props.warpStrength },
+      uWarpFrequency: { value: props.warpFrequency },
+      uWarpSpeed: { value: props.warpSpeed },
+      uWarpAmplitude: { value: props.warpAmplitude },
+      uBlendAngle: { value: props.blendAngle },
+      uBlendSoftness: { value: props.blendSoftness },
+      uRotationAmount: { value: props.rotationAmount },
+      uNoiseScale: { value: props.noiseScale },
+      uGrainAmount: { value: props.grainAmount },
+      uGrainScale: { value: props.grainScale },
+      uGrainAnimated: { value: props.grainAnimated ? 1.0 : 0.0 },
+      uContrast: { value: props.contrast },
+      uGamma: { value: props.gamma },
+      uSaturation: { value: props.saturation },
+      uCenterOffset: { value: new Float32Array([props.centerX, props.centerY]) },
+      uZoom: { value: props.zoom },
+      uColor1: { value: new Float32Array(hexToRgb(props.color1)) },
+      uColor2: { value: new Float32Array(hexToRgb(props.color2)) },
+      uColor3: { value: new Float32Array(hexToRgb(props.color3)) }
+    }
+  });
+
+  const mesh = new Mesh(gl, { geometry, program });
+
+  const setSize = () => {
+    const rect = container.getBoundingClientRect();
+    const width = Math.max(1, Math.floor(rect.width));
+    const height = Math.max(1, Math.floor(rect.height));
+    renderer.setSize(width, height);
+    const res = program.uniforms.iResolution.value as Float32Array;
+    res[0] = gl.drawingBufferWidth;
+    res[1] = gl.drawingBufferHeight;
+  };
+
+  const ro = new ResizeObserver(setSize);
+  ro.observe(container);
+  setSize();
+
+  let raf = 0;
+  const t0 = performance.now();
+  const loop = (t: number) => {
+    // eslint-disable-next-line @typescript-eslint/no-explicit-any
+    (program.uniforms.iTime as any).value = (t - t0) * 0.001;
+    renderer.render({ scene: mesh });
+    raf = requestAnimationFrame(loop);
+  };
+  raf = requestAnimationFrame(loop);
+
+  cleanup = () => {
+    cancelAnimationFrame(raf);
+    ro.disconnect();
+    try {
+      container.removeChild(canvas);
+    } catch {
+      // Ignore
+    }
+  };
+};
+
+onMounted(setup);
+onBeforeUnmount(() => {
+  cleanup?.();
+});
+
+watch(
+  () => [
+    props.timeSpeed,
+    props.colorBalance,
+    props.warpStrength,
+    props.warpFrequency,
+    props.warpSpeed,
+    props.warpAmplitude,
+    props.blendAngle,
+    props.blendSoftness,
+    props.rotationAmount,
+    props.noiseScale,
+    props.grainAmount,
+    props.grainScale,
+    props.grainAnimated,
+    props.contrast,
+    props.gamma,
+    props.saturation,
+    props.centerX,
+    props.centerY,
+    props.zoom,
+    props.color1,
+    props.color2,
+    props.color3
+  ],
+  () => {
+    cleanup?.();
+    setup();
+  },
+  {
+    deep: true
+  }
+);
+</script>
+
+<template>
+  <div ref="containerRef" :class="['relative h-full w-full overflow-hidden', className]" />
+</template>