Experiments with parallel reduction workers

1 files changed, 0 insertions, 90 deletions

diff --git a/worker.js b/worker.js
deleted file mode 100644
index 3b35129..0000000
--- a/worker.js
+++ /dev/null
@@ -1,90 +0,0 @@
-let canvas, gl;
-
-const createShader = (gl, type, source) => {
-  const shader = gl.createShader(type);
-  gl.shaderSource(shader, source);
-  gl.compileShader(shader);
-  const success = gl.getShaderParameter(shader, gl.COMPILE_STATUS);
-  if (success) return shader;
-
-  console.error(gl.getShaderInfoLog(shader));
-  gl.deleteShader(shader);
-};
-
-const createProgram = (gl, vertexShader, fragmentShader) => {
-  const program = gl.createProgram();
-  gl.attachShader(program, vertexShader);
-  gl.attachShader(program, fragmentShader);
-  gl.linkProgram(program);
-  const success = gl.getProgramParameter(program, gl.LINK_STATUS);
-  if (success) return program;
-
-  console.error(gl.getProgramInfoLog(program));
-  gl.deleteProgram(program);
-};
-
-const initGL = () => {
-  const vertexShaderSource = `
-  attribute vec2 a_position;
-  uniform vec2 u_resolution;
-  void main() {
-	vec2 inverted = vec2(a_position.x, u_resolution.y - a_position.y - 1.0); // !! :)
-    vec2 zeroToOne = inverted / u_resolution;
-    vec2 zeroToTwo = zeroToOne * 2.0;
-	vec2 clipSpace = zeroToTwo - 1.0;
-    gl_Position = vec4(clipSpace, 0, 1);
-  }`;
-  const fragmentShaderSource = `
-  precision mediump float;
-  uniform vec4 u_color;
-  void main() {
-    gl_FragColor = u_color;
-  }`;
-
-  const vertexShader = createShader(gl, gl.VERTEX_SHADER, vertexShaderSource);
-  const fragmentShader = createShader(
-    gl,
-    gl.FRAGMENT_SHADER,
-    fragmentShaderSource,
-  );
-
-  const program = createProgram(gl, vertexShader, fragmentShader);
-  const positionAttributeLocation = gl.getAttribLocation(program, "a_position");
-  const colorUniformLocation = gl.getUniformLocation(program, "u_color");
-  const resolutionUniformLocation = gl.getUniformLocation(
-    program,
-    "u_resolution",
-  );
-
-  const positionBuffer = gl.createBuffer();
-  gl.bindBuffer(gl.ARRAY_BUFFER, positionBuffer);
-  gl.viewport(0, 0, gl.canvas.width, gl.canvas.height);
-  gl.useProgram(program);
-  gl.uniform2f(resolutionUniformLocation, gl.canvas.width, gl.canvas.height);
-  gl.enableVertexAttribArray(positionAttributeLocation);
-  gl.vertexAttribPointer(positionAttributeLocation, 2, gl.FLOAT, false, 0, 0);
-
-  return (positions, color) => {
-    gl.bufferData(gl.ARRAY_BUFFER, new Float32Array(positions), gl.STATIC_DRAW);
-    gl.bindBuffer(gl.ARRAY_BUFFER, positionBuffer);
-    gl.uniform4f(colorUniformLocation, ...color);
-    gl.drawArrays(gl.TRIANGLE_FAN, 0, 4);
-  };
-};
-
-let draw;
-self.onmessage = (msg) => {
-  if (msg.data == "clear") {
-    gl.clearColor(0, 0, 0, 0);
-    gl.clear(gl.COLOR_BUFFER_BIT);
-  } else if ("canvas" in msg.data) {
-    canvas = msg.data.canvas;
-    gl = canvas.getContext("webgl", { preserveDrawingBuffer: true });
-    if (!gl) alert("no webgl");
-    gl.viewport(0, 0, canvas.width, canvas.height);
-    draw = initGL();
-  } else {
-    [color, x, y, width, height] = msg.data;
-    draw([x, y + height, x + width, y + height, x + width, y, x, y], color);
-  }
-};