From cb9a4158ccdbc3af0235b6ff6c305a6f01ea74ee Mon Sep 17 00:00:00 2001
From: Ava Gaiety W <ava@wroten.me>
Date: Thu, 19 Jun 2025 12:27:02 -0600
Subject: [PATCH] ditch shadertoy, laggy

---
 _includes/base-header.html      | 145 +----------------------
 package.json                    |   1 -
 styles.css                      |  17 ---
 vendor/shader-web-background.js | 197 --------------------------------
 4 files changed, 1 insertion(+), 359 deletions(-)
 delete mode 100644 vendor/shader-web-background.js

diff --git a/_includes/base-header.html b/_includes/base-header.html
index 1208c48..dea19b2 100644
--- a/_includes/base-header.html
+++ b/_includes/base-header.html
@@ -34,152 +34,9 @@
   <link rel="icon" type="image/png" sizes="32x32" href="/img/site/favicons/favicon-32x32.png">
   <link rel="icon" type="image/png" sizes="16x16" href="/img/site/favicons/favicon-16x16.png">
   <link rel="manifest" href="/img/site/favicons/site.webmanifest">
-  <script src="/shader-web-background.js"></script>
-
-  <script type="x-shader/x-fragment" id="Image">
-  precision highp float;
-
-  uniform vec2  iResolution;
-  uniform float iTime;
-  uniform sampler2D iChannel0;
-  // ... other needed uniforms
- 
-  // -- Paste your Shadertoy code here:
-  // https://www.shadertoy.com/view/ftt3R7
-  #define NUM_LAYERS 10.
-
-  mat2 Rot(float a) {
-    float c = cos(a), s = sin(a);
-    return mat2(c, -s, s, c);
-  }
-
-  float Star(vec2 uv, float flare) {
-      float col = 0.;
-      float d = length(uv);
-      float m = .02/d;
-      
-      float rays = max(0., 1. - abs(uv.x * uv.y * 1000.));
-      m += rays * flare;
-      uv *= Rot(3.1415/4.);
-      rays = max(0., 1. - abs(uv.x * uv.y * 1000.));
-      m += rays * .3 * flare;
-      
-      m *= smoothstep(1., .2, d);
-
-      return m;
-  }
-
-  float Hash21(vec2 p) {
-    p = fract(p * vec2(123.34, 456.21));
-    p += dot(p, p+45.32);
-    
-    return fract(p.x*p.y);
-  }
-
-  vec3 StarLayer(vec2 uv) {
-      vec3 col = vec3(0.);
-      
-      vec2 gv = fract(uv) - 0.5;
-      vec2 id = floor(uv);
-      
-      for(int y = -1; y <= 1; y++ ) {
-          for(int x = -1; x <= 1; x++) {
-              vec2 offs = vec2(x, y);
-
-              float n = Hash21(id + offs);
-              float size = fract(n*345.32);
-              
-              vec2 p = vec2(n, fract(n*34.));
-              
-              float star = Star(gv - offs - p + .5, smoothstep(.8, 1., size) * .6);
-              
-              vec3 hueShift = fract(n*2345.2 + dot(uv /420.,texture2D(iChannel0, vec2(0.25, 0.)).rg))*vec3(.2, .3, .9)*123.2;
-
-              vec3 color = sin(hueShift) * .5 + .5;
-              color = color * vec3(1., .25, 1.+size);
-
-              star *= sin(iTime*3.+n*6.2831)*.4+1.;
-              col += star * size * color;
-          }
-      }
-      
-      return col;
-
-  }
-
-  vec2 N(float angle) {
-    return vec2(sin(angle), cos(angle));
-  }
-
-  void mainImage( out vec4 fragColor, in vec2 fragCoord )
-  {
-      vec2 uv = (fragCoord - 0.5*iResolution.xy)/iResolution.y;
-      vec2 M = (fragCoord - iResolution.xy*.5)/iResolution.y;
-      float t = iTime * .01;
-      
-      uv.x = abs(uv.x);
-      uv.y += tan((5./6.) * 3.1415) * .5;
-
-      vec2 n = N((5./6.) * 3.1415);
-      float d = dot(uv - vec2(.5, 0.), n);
-      uv -= n * max(0., d) * 2.;
-
-      // col += smoothstep(.01, .0, abs(d));
-
-      n = N((2./3.) * 3.1415);
-      float scale = 1.;
-      uv.x += 1.5 / 1.25;
-      for(int i=0; i<5; i++) {
-          scale *= 1.25;
-          uv *= 1.25;
-          uv.x -= 1.5;
-
-          uv.x = abs(uv.x);
-          uv.x -= 0.5;
-          uv -= n * min(0., dot(uv, n)) * 2.;
-      }
-
-   
-      uv += M * 4.;
-
-      uv *= Rot(t);
-      vec3 col = vec3(0.);
-      
-      float layers = 10.;
-      
-      for(float i=0.; i < 1.; i+=1./NUM_LAYERS) {
-          float depth = fract(i+t);
-          float scale = mix(20., .5, depth);
-          float fade = depth * smoothstep(1., .9, depth);
-          col += StarLayer(uv * scale + i * 453.2) * fade;
-      }
-
-      fragColor = vec4(col,1.0);
-  }
-  // -- End of Shadertoy code
-    
-    
-  void main() {
-    mainImage(gl_FragColor, gl_FragCoord.xy);
-  }
-</script>
-
-<script>
-shaderWebBackground.shade({
-  shaders: {
-    Image: {
-      uniforms: {
-        iResolution: (gl, loc, ctx) => gl.uniform2f(loc, ctx.width, ctx.height),
-        iTime:       (gl, loc) => gl.uniform1f(loc, performance.now() / 5000),
-        iChannel0: (gl, loc, ctx) => ctx.texture(loc, ctx.buffers.BufferA),
-      }
-    }
-  }
-});
-</script>
 </head>
 
-<body class="bg-crust bg-[length:20rem]">
+<body class="bg-crust bg-[length:20rem] bg-[url('/img/site/stars-light.gif')] dark:bg-[url('/img/site/stars-dark.gif')]">
   <div class="flex gap-y-12 flex-col sm:flex-row">
     <header class="flex gap-2 justify-between flex-col xs:flex-row sm:flex-col sm:justify-start">
       <img
diff --git a/package.json b/package.json
index 0bac6c6..f4256b7 100644
--- a/package.json
+++ b/package.json
@@ -12,7 +12,6 @@
     "build": "npx @11ty/eleventy",
     "postbuild": "run-s postbuild:*",
     "postbuild:highlighttheme": "cp ./node_modules/@catppuccin/highlightjs/css/catppuccin-variables.rgb.css ./_site",
-    "postbuild:shader": "cp ./vendor/shader-web-background.js ./_site",
     "postbuild:styles": "npx tailwindcss -i styles.css -o _site/styles.css --env production",
     "optimize": "rm -rf _site/_jampack && jampack _site",
     "test": "echo \"Error: no test specified\" && exit 1",
diff --git a/styles.css b/styles.css
index 985d3de..843927c 100644
--- a/styles.css
+++ b/styles.css
@@ -52,23 +52,6 @@
   }
 }
 
-body:before {
-  background: url('/img/site/stars-light.gif');
-  content: '';
-  position: fixed;
-  opacity: 0.85;
-  top: 0;
-  right: 0;
-  bottom: 0;
-  left: 0;
-  z-index: -1;
-}
-@media (prefers-color-scheme: dark) {
-  body:before {
-    background: url('/img/site/stars-dark.gif');
-  }
-}
-
 .hljs-comment {
   font-style: italic;
 }
diff --git a/vendor/shader-web-background.js b/vendor/shader-web-background.js
deleted file mode 100644
index ad92b4c..0000000
--- a/vendor/shader-web-background.js
+++ /dev/null
@@ -1,197 +0,0 @@
-// -- https://xemantic.github.io/shader-web-background/
-const shaderWebBackground = {}; (() => {
-  'use strict'; const t = (a, b) => {
-    b.initHalfFloatRGBATexture(b.width, b.height); a.texParameteri(a.TEXTURE_2D,
-      a.TEXTURE_MIN_FILTER, a.LINEAR); a.texParameteri(a.TEXTURE_2D, a.TEXTURE_MAG_FILTER,
-        a.LINEAR); a.texParameteri(a.TEXTURE_2D, a.TEXTURE_WRAP_S, a.CLAMP_TO_EDGE); a.texParameteri(a.TEXTURE_2D,
-          a.TEXTURE_WRAP_T, a.CLAMP_TO_EDGE)
-  }, x = (a, b) => {
-    console.warn("shader-web-background cannot shade, adding fallback CSS classes");
-    document.documentElement.classList.add("shader-web-background-fallback"); b.classList.add("shader-web-background-fallback");
-    if (a instanceof shaderWebBackground.GlError) console.warn("Not sufficient WebGL support:",
-      a); else throw a;
-  };
-  function y(a, b) { if (!a) throw new shaderWebBackground.ConfigError(b); }
-  function z(a) {
-    y(a instanceof HTMLCanvasElement, "config.canvas must be instance of canvas");
-    return a
-  }
-  function A() {
-    const a = document.createElement("canvas"), b = a.style; a.id = "shader-web-background"; b.width =
-      "100vw"; b.height = "100vh"; b.position = "fixed"; b.top = "0"; b.left = "0"; b.zIndex = -9999; return a
-  }
-  function B(a, b, c) {
-    y(a instanceof HTMLScriptElement && a.type === b, 'Shader source element of id "' +
-      c + '" should be of type: <script type="' + (b + '" id="' + c + '">'))
-  }
-  function D(a) {
-    const b = document.getElementById(a); y(b, 'Missing shader source: <script type="x-shader/x-fragment" id="' +
-      (a + '">')); B(b, "x-shader/x-fragment", a); return b.text
-  }
-  function E(a) {
-    a += "Vertex"; const b = document.getElementById(a); return b ? (B(b, "x-shader/x-vertex",
-      a), b.text) : "attribute vec2 V;void main(){gl_Position=vec4(V,0,1);}"
-  }
-  function F(a, b) { "loading" !== document.readyState ? b() : window.addEventListener(a, b) }
-  class G {
-    constructor(a, b, c, d) {
-      this.g = c; const l = a.gl; this.h = () => {
-        for (const f of d) f.u(l,
-          f.location, b)
-      }; this.i = () => {
-        var f = c.v, h = a.gl; h.bindBuffer(h.ARRAY_BUFFER, a.j); h.enableVertexAttribArray(f);
-        h.vertexAttribPointer(f, 2, h.FLOAT, !1, 0, 0); h.drawArrays(h.TRIANGLE_STRIP, 0, 4); h.disableVertexAttribArray(f);
-        h.bindBuffer(h.ARRAY_BUFFER, null); f = a.gl; for (h = 0; h < a.g; h++)f.activeTexture(f.TEXTURE0 +
-          h), f.bindTexture(f.TEXTURE_2D, null); a.g = 0
-      }
-    }
-  }
-  function H(a) {
-    var b = { antialias: !1, depth: !1, alpha: !1 }; try { return new I(a, b) } catch (c) {
-      throw new shaderWebBackground.GlError(c.message);
-    }
-  }
-  function J(a, b, c, d, l, f) {
-    function h(e, m, n) {
-      try {
-        {
-          var k = p; const q = k.gl, P = K(k, e, q.VERTEX_SHADER, m),
-            Q = K(k, e, q.FRAGMENT_SHADER, n), v = q.createProgram(); q.attachShader(v, P); q.attachShader(v,
-              Q); q.linkProgram(v); var r = v
-        } return r
-      } catch (q) {
-        throw new shaderWebBackground.ConfigError(q.message);
-      }
-    } const p = H(a), w = [], g = {
-      gl: p.gl, canvas: a, width: 0, height: 0, cssPixelRatio: 0, cssWidth: 0,
-      cssHeight: 0, isOverShader: (e, m) => {
-        const n = a.getBoundingClientRect(); return e >= n.left &&
-          e <= n.right && m >= n.top && m <= n.bottom
-      }, toShaderX: e => (e - a.getBoundingClientRect().left) *
-        g.cssPixelRatio + .5, toShaderY: e => a.height - (e - a.getBoundingClientRect().top) * g.cssPixelRatio -
-          .5, s: () => g.cssWidth !== a.clientWidth || g.cssHeight !== a.clientHeight ? (g.resize(), !0) :
-            !1, resize: () => {
-              const e = window.devicePixelRatio || 1, m = a.clientWidth, n = a.clientHeight,
-              k = Math.floor(m * e), r = Math.floor(n * e); a.width = k; a.height = r; g.width = k; g.height = r; g.cssPixelRatio =
-                e; g.cssWidth = m; g.cssHeight = n; p.gl.viewport(0, 0, p.canvas.width, p.canvas.height); for (const q of w) q.g.l(k,
-                  r)
-            }, texture: (e, m) => {
-              {
-                var n = p; const k = n.gl; m = m instanceof L ? m.g : m; k.activeTexture(k.TEXTURE0 +
-                  n.g); k.bindTexture(k.TEXTURE_2D, m); k.uniform1i(e, n.g++)
-              }
-            }, buffers: {}, initHalfFloatRGBATexture: (e,
-              m) => { p.h.g(e, m) }
-    }, R = Object.keys(b).length - 1; let S = 0; for (const e in b) {
-      if (S++ < R) {
-        const k =
-          b[e].texture || t; g.buffers[e] = M(p, () => { k(p.gl, g) })
-      } const m = N(p, h(e, E(e), D(e)), g.buffers[e]),
-        n = b[e].uniforms || {}; var u = Object.keys(n); for (const k of m.m) y(n[k.name], 'No configuration for uniform "' +
-          k.name + '" defined in shader "' + e + '"'), u = u.filter(r => r !== k.name); 0 !== u.length && console.warn('Extra uniforms configured for shader "' +
-            e + '", which are not present in the shader code - might have been removed by GLSL compiler if not used: ' +
-            u.join(", ")); u = m.m.map(k => ({ location: k.location, u: n[k.name] })); w.push(new G(p, g,
-              m, u))
-    } const C = () => {
-      g.s() && d && d(g.width, g.height, g); l && l(g); for (const e of w) e.g.i(e.h,
-        e.i); f && f(g); requestAnimationFrame(C)
-    }; F("load", () => {
-      g.resize(); c && c(g); d && d(g.width,
-        g.height, g); requestAnimationFrame(C)
-    }); return g
-  }
-  shaderWebBackground.Error = class extends Error { constructor(a) { super(a); this.name = "shaderWebBackground.Error" } };
-  shaderWebBackground.ConfigError = class extends shaderWebBackground.Error {
-    constructor(a) {
-      super(a);
-      this.name = "shaderWebBackground.ConfigError"
-    }
-  };
-  shaderWebBackground.GlError = class extends shaderWebBackground.Error {
-    constructor(a) {
-      super(a); this.name =
-        "shaderWebBackground.GlError"
-    }
-  };
-  shaderWebBackground.shade = function(a) {
-    y(a, "Missing config argument"); const b = a.canvas ?
-      z(a.canvas) : A(); y(a.shaders, "No shaders specified in config"); try {
-        const c = J(b, a.shaders,
-          a.onInit, a.onResize, a.onBeforeFrame, a.onAfterFrame); a.canvas || F("DOMContentLoaded",
-            () => { document.body.appendChild(b) }); return c
-      } catch (c) { (a.onError || x)(c, b) }
-  }; const O = [-1, 1, 1, 1, -1, -1, 1, -1];
-  function T(a, b) { return a.j(a.gl.getExtension(b), b + " extension is not supported") }
-  class U { constructor(a, b) { this.gl = a; this.j = b } g() { } }
-  class V extends U {
-    constructor(a, b) {
-      super(a, b); this.h = T(this, "OES_texture_half_float");
-      T(this, "OES_texture_half_float_linear")
-    } g(a, b) {
-      const c = this.gl; c.texImage2D(c.TEXTURE_2D,
-        0, c.RGBA, a, b, 0, c.RGBA, this.h.HALF_FLOAT_OES, null)
-    }
-  }
-  class W extends U {
-    constructor(a, b) { super(a, b); T(this, "EXT_color_buffer_float"); this.gl.getExtension("OES_texture_float_linear") } g(a,
-      b) {
-        const c = this.gl; c.texImage2D(c.TEXTURE_2D, 0, c.RGBA16F, a, b, 0, c.RGBA, c.HALF_FLOAT,
-          null)
-    }
-  }
-  function X(a) {
-    a = a.split(/\r?\n/); const b = a.length.toString().length; var c = []; a.forEach((d,
-      l) => {
-        l = (l + 1).toString(); l = l.length >= b ? l : " ".repeat(b - l.length) + l; c.push(l + ": " + d +
-          "\n")
-    }); return c.join("")
-  } function M(a, b) { return new L(a.gl, () => { b(a.gl) }) }
-  function N(a, b, c) {
-    const d = a.gl; a = []; const l = d.getProgramParameter(b, d.ACTIVE_UNIFORMS);
-    for (let f = 0; f < l; f++) {
-      const h = d.getActiveUniform(b, f); a.push({
-        name: h.name, location: d.getUniformLocation(b,
-          h.name)
-      })
-    } return {
-      v: d.getAttribLocation(b, "V"), m: a, l: c ? (f, h) => c.l(f, h) : () => { }, i: (f,
-        h) => { d.useProgram(b); f(); c ? (f = c.g, c.g = c.h, c.h = f, c.i(h)) : h() }
-    }
-  }
-  function K(a, b, c, d) {
-    a = a.gl; c = a.createShader(c); a.shaderSource(c, d); a.compileShader(c);
-    if (!a.getShaderParameter(c, a.COMPILE_STATUS)) {
-      const l = String(a.getShaderInfoLog(c));
-      a.deleteShader(c); b = "Cannot compile shader - " + b + ": " + l; console.log(b); console.log(X(d));
-      throw Error(b);
-    } return c
-  }
-  class I {
-    constructor(a, b) {
-      this.canvas = a; const c = (l, f) => { if (!l) throw Error(f); return l };
-      let d = a.getContext("webgl2", b); if (d) this.h = new W(d, c); else if (d = a.getContext("webgl",
-        b)) this.h = new V(d, c); c(d, "webgl context not supported on supplied canvas element: " +
-          a); this.gl = d; a = d.createBuffer(); d.bindBuffer(d.ARRAY_BUFFER, a); d.bufferData(d.ARRAY_BUFFER,
-            new Float32Array(O), d.STATIC_DRAW); d.bindBuffer(d.ARRAY_BUFFER, null); this.j = a; this.buffers =
-              {}; this.g = 0
-    }
-  }
-  function Y(a) {
-    const b = a.gl, c = b.createTexture(); b.bindTexture(b.TEXTURE_2D, c); a.o(b);
-    b.bindTexture(b.TEXTURE_2D, null); return c
-  }
-  class L {
-    constructor(a, b) {
-      this.j = a.createFramebuffer(); this.gl = a; this.o = b; this.g = this.h =
-        null
-    } l() {
-      this.h && this.gl.deleteTexture(this.h); this.g && this.gl.deleteTexture(this.g);
-      this.h = Y(this); this.g = Y(this)
-    } i(a) {
-      const b = this.gl; b.bindFramebuffer(b.FRAMEBUFFER,
-        this.j); b.framebufferTexture2D(b.FRAMEBUFFER, b.COLOR_ATTACHMENT0, b.TEXTURE_2D, this.g,
-          0); a(); b.framebufferTexture2D(b.FRAMEBUFFER, b.COLOR_ATTACHMENT0, b.TEXTURE_2D, null,
-            0); b.bindFramebuffer(b.FRAMEBUFFER, null)
-    }
-  };
-})()