{"version":3,"file":"main-D_usaHkc.js","sources":["../../../app/frontend/assets/js/main.js"],"sourcesContent":["export function main(\n  _vsSource,\n  _fbsSource,\n  _fsSource,\n  _globals,\n  _drawInfo,\n  _feedbackInfo,\n  _init,\n  _tick,\n) {\n  const sizes = {\n    width: window.innerWidth,\n    height: window.innerHeight,\n  };\n\n  const canvas = document.getElementById(\"gl\");\n  let gl = canvas.getContext(\"webgl\");\n  canvas.width = sizes.width;\n  canvas.height = sizes.height;\n  gl.viewport(0, 0, gl.drawingBufferWidth, gl.drawingBufferHeight);\n\n  // fullscreen quad\n  const quadVerts = new Float32Array([\n    -1, -1, 1, -1, -1, 1, -1, 1, 1, -1, 1, 1,\n  ]);\n  const quadBuffer = gl.createBuffer();\n  gl.bindBuffer(gl.ARRAY_BUFFER, quadBuffer);\n  gl.bufferData(gl.ARRAY_BUFFER, quadVerts, gl.STATIC_DRAW);\n\n  const programs = initShaderPrograms(gl, _vsSource, _fbsSource, _fsSource);\n  const fbInfo = _feedbackInfo(gl, programs.feedbackProgram);\n  const drawInfo = _drawInfo(gl, programs.drawProgram);\n  let speckle = false;\n  function poke(x, y, texture) {\n    gl.bindTexture(gl.TEXTURE_2D, texture);\n\n    // https://developer.mozilla.org/en-US/docs/Web/API/WebGLRenderingContext/texSubImage2D\n    gl.texSubImage2D(\n      gl.TEXTURE_2D,\n      0,\n      // x offset, y offset, width, height\n      x,\n      y,\n      1,\n      1,\n      gl.RGBA,\n      gl.UNSIGNED_BYTE,\n      // is supposed to be a typed array\n      new Uint8Array([255, 255, 255, 255]),\n    );\n  }\n  canvas.onmousedown = function (event) {\n    //console.debug(event);\n    console.debug(\"mousedown\", event.offsetX, canvas.height - event.offsetY);\n\n    poke(\n      event.offsetX / _globals.pixelDensity,\n      (canvas.height - event.offsetY) / _globals.pixelDensity,\n      _globals.backTex,\n    );\n  };\n  canvas.onmousemove = function (event) {\n    //console.debug(event);\n    if (!speckle) {\n      poke(\n        event.offsetX / _globals.pixelDensity,\n        (canvas.height - event.offsetY) / _globals.pixelDensity,\n        _globals.backTex,\n      );\n    }\n  };\n  canvas.ontouchmove = function (event) {\n    event.preventDefault();\n    poke(\n      event.changedTouches[0].clientX / _globals.pixelDensity,\n      (canvas.height - event.changedTouches[0].clientY) / _globals.pixelDensity,\n      _globals.backTex,\n    );\n  };\n  window.onkeydown = function (event) {\n    if (event.key === \"Shift\") {\n      speckle = true;\n    }\n  };\n  window.onkeyup = function (event) {\n    if (event.key === \"Shift\") {\n      speckle = false;\n    }\n  };\n  _init(gl, fbInfo, drawInfo);\n\n  function makeTexture() {\n    _globals.backTex = gl.createTexture();\n    gl.bindTexture(gl.TEXTURE_2D, _globals.backTex);\n    gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE);\n    gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE);\n    gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.NEAREST);\n    gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.NEAREST);\n    gl.texImage2D(\n      gl.TEXTURE_2D,\n      0,\n      gl.RGBA,\n      sizes.width,\n      sizes.height,\n      0,\n      gl.RGBA,\n      gl.UNSIGNED_BYTE,\n      null,\n    );\n\n    _globals.frontTex = gl.createTexture();\n    gl.bindTexture(gl.TEXTURE_2D, _globals.frontTex);\n    gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE);\n    gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE);\n    gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.NEAREST);\n    gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.NEAREST);\n    gl.texImage2D(\n      gl.TEXTURE_2D,\n      0,\n      gl.RGBA,\n      sizes.width,\n      sizes.height,\n      0,\n      gl.RGBA,\n      gl.UNSIGNED_BYTE,\n      null,\n    );\n\n    _globals.framebuffer = gl.createFramebuffer();\n  }\n\n  let time = 0;\n\n  function render() {\n    window.requestAnimationFrame(render);\n    time++;\n    _tick(gl, fbInfo, drawInfo, time);\n  }\n  makeTexture();\n  render();\n}\n\nfunction initShaderPrograms(gl, vsSource, fbsSource, fsSource) {\n  const vertexShader = loadShader(gl, gl.VERTEX_SHADER, vsSource);\n  const fragmentShader = loadShader(gl, gl.FRAGMENT_SHADER, fsSource);\n  const feedbackShader = loadShader(gl, gl.FRAGMENT_SHADER, fbsSource);\n\n  const drawProgram = gl.createProgram();\n  gl.attachShader(drawProgram, vertexShader);\n  gl.attachShader(drawProgram, fragmentShader);\n  gl.linkProgram(drawProgram);\n\n  if (!gl.getProgramParameter(drawProgram, gl.LINK_STATUS)) {\n    alert(\n      \"Unable to initialize the shader program: \" +\n        gl.getProgramInfoLog(drawProgram),\n    );\n    return null;\n  }\n\n  const feedbackProgram = gl.createProgram();\n  gl.attachShader(feedbackProgram, vertexShader);\n  gl.attachShader(feedbackProgram, feedbackShader);\n  gl.linkProgram(feedbackProgram);\n\n  if (!gl.getProgramParameter(feedbackProgram, gl.LINK_STATUS)) {\n    alert(\n      \"Unable to initialize the shader program: \" +\n        gl.getProgramInfoLog(feedbackProgram),\n    );\n    return null;\n  }\n\n  return { drawProgram, feedbackProgram };\n}\n\nfunction loadShader(gl, type, source) {\n  const shader = gl.createShader(type);\n  gl.shaderSource(shader, source);\n  gl.compileShader(shader);\n  if (!gl.getShaderParameter(shader, gl.COMPILE_STATUS)) {\n    alert(\n      \"An error occurred compiling the shaders: \" + gl.getShaderInfoLog(shader),\n    );\n    gl.deleteShader(shader);\n    return null;\n  }\n\n  return 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