ShaderPlayground/texture.html at main · QuackingBob/ShaderPlayground · GitHub

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<!DOCTYPE html>
<html>

<head>
  <title>Shaders</title>
  <!-- <script src="https://cdnjs.cloudflare.com/ajax/libs/gl-matrix/2.8.1/gl-matrix-min.js"></script> -->
  <script src="vertexDOGShader.glsl"></script>
  <script src="fragmentDOGShader.glsl"></script>
  <link rel="stylesheet" href="style.css">

  <!-- <style>
    /* { box-sizing: border-box; margin: 0; padding: 0; } */
    body { font-family: Arial, sans-serif; color: white; background: linear-gradient(to right, #0f2027, #203a43, #2c5364); }

    h3, h4 { text-align: center; }

    #webgl-canvas { display: block; margin: auto; width: 80%; height: 80%; border: 5px solid white; }
    #canvas { display: block; margin: auto; width: 80%; height: 80%; border: 5px solid white; }

    .slidecontainer { width: 80%; margin: auto; padding: 20px; }

    .slider { -webkit-appearance: none; width: 100%; height: 15px; border-radius: 5px; background: #d3d3d3; outline: none; opacity: 0.7; -webkit-transition: .2s; transition: opacity .2s; }

    .slider:hover { opacity: 1; }

    .slider::-webkit-slider-thumb { -webkit-appearance: none; appearance: none; width: 25px; height: 25px; border-radius: 50%; background: #f5fff5; cursor: pointer; }

    .slider::-moz-range-thumb { width: 25px; height: 25px; border-radius: 50%; background: #f5fff5; cursor: pointer; }

    table { width: 100%; border-collapse: collapse; }

    td { width: 33%; padding: 10px; }

    #palette_url { width: calc(100% - 120px); margin-right: 10px; }

    button { display: inline-block; padding: 10px 20px; border: none; border-radius: 5px; background: #464646; color: white; font-size: 16px; cursor: pointer; box-shadow: 0 4px 8px 0 rgba(0,0,0,0.2); transition: 0.3s; }

    button:hover { box-shadow: 0 8px 16px 0 rgba(0,0,0,0.2); transform: scale(1.1); }

    label { display: inline-block; padding: 10px 20px; border: none; border-radius: 5px; background: #464646; color: white; font-size: 16px; cursor: pointer; box-shadow: 0 4px 8px 0 rgba(0,0,0,0.2); transition: 0.3s; }

    label:hover { box-shadow: 0 8px 16px 0 rgba(0,0,0,0.2); transform: scale(1.1); }

    .button-container { display: block; justify-content: center; align-items: center; width: 80%; margin: auto; padding: 20px;  }

  </style> -->
</head>

<body>
  <h3 id="fps_counter">FPS: </h3>
  <canvas id="webgl-canvas" style="background: black;"></canvas>
  <div class="slidecontainer">
    <table>
      <tr>
        <td>
          <h4 id="tau_val">Tau:</h4>
          <input type="range" min="1" max="200" value="50" class="slider" id="tau">
        </td>
        <td>
          <h4 id="sigma_val">Tau:</h4>
          <input type="range" min="1" max="200" value="50" class="slider" id="sigma">
        </td>
        <td>
          <h4 id="k_val">Tau:</h4>
          <input type="range" min="1" max="200" value="50" class="slider" id="k">
        </td>
      </tr>
      <tr>
        <td>
          <h4 id="phi_val">Tau:</h4>
          <input type="range" min="1" max="200" value="50" class="slider" id="phi">
        </td>
        <td>
          <h4 id="epsilon_val">Tau:</h4>
          <input type="range" min="1" max="100" value="50" class="slider" id="epsilon">
        </td>
        <td>
          <h4 id="radius_val">Tau:</h4>
          <input type="range" min="1" max="100" value="50" class="slider" id="radius">
        </td>
      </tr>
    </table>
    <h4 id="kernel_size_val">Tau:</h4>
    <input type="range" min="1" max="100" value="3" class="slider" id="kernel_size">
    <h4 id="canvas_width_val">Tau:</h4>
    <input type="range" min="1" max="100" value="16" class="slider" id="canvas_width">
    <table>
      <tr>
        <td>
          <h4 id="mode">Mode: N Color Mapping</h4>
          <button type="button" id="toggle_mode" onclick="updateMode()">Toggle Mode</button>
        </td>
        <td>
          <h4 id="swap-palette-scheme">Swap Palette Scheme</h4>
          <button type="button" id="toggle_scheme" onclick="reversePalette()" style="text-align: center; margin: auto">Switch Palette</button>
        </td>
      </tr>
    </table>
    <h4>Enter a pallete url from coolers ex: https://coolors.co/palette/e63946-f1faee-a8dadc-457b9d-1d3557</h4>
    <input type="text" id="palette_url">
    <button type="button" id="submit_palette" onclick="updatePalette()" style="text-align: center">Change Palette</button>
    <br>
    <br>
    <div class="dropdown">
      <select id="paletteDropdown" onchange="updatePalettePresets()">
      </select>
    </div>
  </div>

  <h3>Logs</h3>
  <p id="log"></p>

  <div class=“button-container”>
    <!-- <label for="fileInput">Choose an image</label> -->
    <input type="file" id="fileInput" onchange="loadImage()" />
  </div>
  <br />
  <canvas id="canvas"></canvas>

  <script>
    var mode = 1;

    const scales = {
      "tau": 4.0/100.0,
      "sigma": 4.0/100.0,
      "k": 4.0/100.0,
      "phi": 4.0/100.0,
      "epsilon": 1.0/100.0,
      "kernel_size": 1,
      "radius": 10.0/100.0,
      "canvas_width": 64
    };

    var rgb_vals = [];
    var palette_size = 5;
    var max_n = 10;

    urlToRgb("https://coolors.co/palette/e63946-f1faee-a8dadc-457b9d-1d3557")

    var palettes = {
      "default": "https://coolors.co/palette/e63946-f1faee-a8dadc-457b9d-1d3557",
      "purple": "https://coolors.co/palette/231942-5e548e-9f86c0-be95c4-e0b1cb",
      "blueredgrad": "https://coolors.co/palette/001219-005f73-0a9396-94d2bd-e9d8a6-ee9b00-ca6702-bb3e03-ae2012-9b2226",
      "greengrad": "https://coolors.co/000000-0d1111-26302b-a19c79-949f92-dee7dc",
      "tangreen": "https://coolors.co/e1ca96-aca885-918b76-626c66-434a42",
      "candy": "https://coolors.co/6dd3ce-c8e9a0-f7a278-a13d63-351e29",
      "blueorange": "https://coolors.co/2d3142-bfc0c0-ffffff-ef8354-4f5d75",
      "mintybark": "https://coolors.co/e5ffde-bbcbcb-9590a8-634b66-18020c",
      "graytones": "https://coolors.co/palette/f8f9fa-e9ecef-dee2e6-ced4da-adb5bd-6c757d-495057-343a40-212529",
      "grayblues": "https://coolors.co/palette/e0fbfc-c2dfe3-9db4c0-5c6b73-253237",
      "greenpeach": "https://coolors.co/palette/a3a380-d6ce93-efebce-d8a48f-bb8588",
      "cyanorange": "https://coolors.co/palette/264653-2a9d8f-e9c46a-f4a261-e76f51",
      "lightpinks": "https://coolors.co/palette/fec5bb-fcd5ce-fae1dd-f8edeb-e8e8e4-d8e2dc-ece4db-ffe5d9-ffd7ba-fec89a",
      "forest": "https://coolors.co/palette/582f0e-7f4f24-936639-a68a64-b6ad90-c2c5aa-a4ac86-656d4a-414833-333d29",
      "bubblegum": "https://coolors.co/palette/b7094c-a01a58-892b64-723c70-5c4d7d-455e89-2e6f95-1780a1-0091ad",
      "comicred": "https://coolors.co/palette/1e1e24-92140c-fff8f0",
      "comicorange": "https://coolors.co/palette/000000-14213d-fca311",
      "yellows": "https://coolors.co/palette/423e37-e3b23c-edebd7",
      "threetonepink": "https://coolors.co/palette/4c5454-ff715b-ffffff",
      "heatmap": "https://coolors.co/palette/0450b4-046dc8-1184a7-15a2a2-6fb1a0-b4418e-d94a8c-ea515f-fe7434-fea802",
      "4tonered": "https://coolors.co/palette/003049-d62828-f77f00-fcbf49",
      "deepred": "https://coolors.co/palette/250902-38040e-640d14-800e13-ad2831",
    };

    var select = document.getElementById("paletteDropdown");

    for (var key in palettes) {
      var option = document.createElement("option");
      option.text = key;
      option.value = palettes[key];
      select.appendChild(option);
    }

    function updatePalettePresets() {
      var url = document.getElementById("paletteDropdown").value;
      console.log("loading palette: " + url);
      urlToRgb(url);
      updateImage();
    }

    function updateImage() {
      const canvas = document.getElementById("canvas");
      const ctx = canvas.getContext('2d');
      const imageData = ctx.getImageData(0, 0, canvas.width, canvas.height);
      const img = new Image();
      img.src = canvas.toDataURL();
      main(img, getSlider("tau"), getSlider("sigma"), getSlider("k"), getSlider("phi"), getSlider("epsilon"), getSlider("kernel_size"), getSlider("radius"));
    }

    function updatePalette() {
      text = document.getElementById("palette_url").value;
      console.log(text);
      urlToRgb(text);
      updateImage();
    }

    function updateMode() {
      mode_indicator = document.getElementById("mode");
      if (mode == 1) {
        mode = 0;
        mode_indicator.innerHTML = "Mode: Tanh Thresholding Function";
      }
      else {
        mode = 1;
        mode_indicator.innerHTML = "Mode: N Color Mapping";
      }
      updateImage();
    }

    function reversePalette() {
      new_rgb = [];
      for (var i = rgb_vals.length / 3 - 1; i >= 0; i--) {
        var index = i * 3;
        new_rgb.push(rgb_vals[index], rgb_vals[index + 1], rgb_vals[index + 2]);
      }
      rgb_vals = new_rgb;
      updateImage();
    }

    sliderUpdate("tau");
    sliderUpdate("sigma");
    sliderUpdate("k");
    sliderUpdate("phi");
    sliderUpdate("epsilon");
    sliderUpdate("kernel_size");
    sliderUpdate("radius");
    sliderUpdate("canvas_width")

    // A function to convert a hex color to an rgb color
    function hexToRgb(hex) {
      // Remove the # symbol if present
      if (hex.charAt(0) === "#") {
        hex = hex.slice(1);
      }
      // Parse the hex string into three numbers
      var r = parseInt(hex.slice(0, 2), 16);
      var g = parseInt(hex.slice(2, 4), 16);
      var b = parseInt(hex.slice(4, 6), 16);
      // Return an array of rgb values
      return [r, g, b];
    }

    // A function to extract the hex colors from a url string
    function getHexColors(url) {
      // Split the url by the / character
      var parts = url.split("/");
      // Get the last part of the url, which contains the hex colors
      var hexColors = parts[parts.length - 1];
      // Split the hex colors by the - character
      var hexArray = hexColors.split("-");
      // Return an array of hex colors
      return hexArray;
    }

    // A function to convert a url string to an array of rgb values
    function urlToRgb(url) {
      // Get the array of hex colors from the url
      var hexArray = getHexColors(url);
      // Initialize an empty array to store the rgb values
      var rgbArray = [];
      // Loop through the hex array and convert each color to rgb
      for (var i = 0; i < hexArray.length && i < max_n; i++) {
        var hex = hexArray[i];
        var rgb = hexToRgb(hex);
        // Push the rgb array to the rgb array
        rgbArray.push(rgb[0], rgb[1], rgb[2]);
      }
      // Return the array of rgb values
      // return rgbArray;
      rgb_vals = rgbArray;
      palette_size = hexArray.length;
    }

    function sliderUpdate(name) {
      var slider = document.getElementById(name);
      var slider_val = document.getElementById(name + "_val");
      slider_val.innerHTML = name + ": " + slider.value * scales[name];
      slider.oninput = function() {
        slider_val.innerHTML = name + ": " + this.value * scales[name];
        updateImage();
      }
    }

    function getSlider(name) {
      return document.getElementById(name).value * scales[name];
    }

    async function loadImage() {
      const fileInput = document.getElementById("fileInput");
      const canvas = document.getElementById("canvas");
      const ctx = canvas.getContext("2d");
      const file = fileInput.files[0];
      const reader = new FileReader();
      reader.onload = function (e) {
        const img = new Image();
        img.onload = function () {
          canvas.width = getSlider("canvas_width");
          canvas.height = (canvas.width / img.width) * img.height;
          ctx.drawImage(img, 0, 0, canvas.width, canvas.height);
        };
        img.src = e.target.result;
        console.log("loaded image \"" + img.src + "\"");
        console.log("loaded image \"" + file.name + "\"");

        main(img, getSlider("tau"), getSlider("sigma"), getSlider("k"), getSlider("phi"), getSlider("epsilon"), getSlider("kernel_size"), getSlider("radius"));
      };
      reader.readAsDataURL(file);
    }

    function loadTexture(gl, img) {
      const texture = gl.createTexture();
      gl.bindTexture(gl.TEXTURE_2D, texture);

      const level = 0;
      const internalFormat = gl.RGBA;
      const width = 1;
      const height = 1;
      const border = 0;
      const srcFormat = gl.RGBA;
      const srcType = gl.UNSIGNED_BYTE;

      gl.texImage2D(
        gl.TEXTURE_2D,
        level,
        internalFormat,
        srcFormat,
        srcType,
        img
      );

      if (isPowerOf2(img.width) && isPowerOf2(img.height)) {
        gl.generateMipmap(gl.TEXTURE_2D);
      }
      else {
        gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE);
        gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE);
        gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.LINEAR);
      }

      return texture;
    }

    function isPowerOf2(value) {
      return (value & value - 1) == 0;
    }

    function initTextureBuffer(gl) {
        const textureCoordBuffer = gl.createBuffer();
        gl.bindBuffer(gl.ARRAY_BUFFER, textureCoordBuffer);

        const textureCoordinates = [
            0.0, 0.0,
            0.0, 1.0,
            1.0, 1.0,
            1.0, 1.0,
            1, 0,
            0, 0
        ];

        gl.bufferData(
            gl.ARRAY_BUFFER,
            new Float32Array(textureCoordinates),
            gl.STATIC_DRAW
        );

        return textureCoordBuffer;
    }

    function setTextureAttribute(gl, texture_coord_buffer, program_info) {
      const num = 2; // each coord has 2 vals
      const type = gl.FLOAT; // the data is 32 bit buffer
      const normalize = false; // don't normalize
      const stride = 0; // how many bytes to get from one set to the next
      const offset = 0; // how many bytes inside the buffer to start from
      gl.bindBuffer(gl.ARRAY_BUFFER, texture_coord_buffer);
      gl.vertexAttribPointer(
        program_info.attribute_locations.texture_coord,
        num,
        type,
        normalize,
        stride,
        offset
      );
      gl.enableVertexAttribArray(program_info.attribute_locations.texture_coord);
    }

    async function main(img, tau, sigma, k, phi, epsilon, kernel_size, radius) {
      var vert;
      var frag;

      const response1 = await fetch('vertexDOGShader.glsl');
      vert = await response1.text();

      const response2 = await fetch('fragmentDOGShader.glsl');
      frag = await response2.text();

      console.log("vert: " + vert);
      console.log("frag: " + frag);

      document.getElementById("log").innerHTML = "";

      var canvas = document.getElementById("webgl-canvas");
      canvas.height = img.height;
      canvas.width = img.width;

      var gl = document.getElementById("webgl-canvas").getContext('webgl');

      var vertexShader = createShader(gl, gl.VERTEX_SHADER, vert);
      var fragmentShader = createShader(gl, gl.FRAGMENT_SHADER, frag);
      var program = createProgram(gl, vertexShader, fragmentShader);

      const program_info = {
        program: program,
        attribute_locations: {
          vertex_position: gl.getAttribLocation(program, "a_position"),
          texture_coord: gl.getAttribLocation(program, "aTextureCoord")
        },
        uniformLocations: {
          u_sampler: gl.getUniformLocation(program, "uSampler"),
          u_resolution: gl.getUniformLocation(program, "uResolution"),
          u_sigma: gl.getUniformLocation(program, "uSigma"),
          u_kernel_size: gl.getUniformLocation(program, "uKernelSize"),
          u_tau: gl.getUniformLocation(program, "uTau"),
          u_k: gl.getUniformLocation(program, "uK"),
          u_phi: gl.getUniformLocation(program, "uPhi"),
          u_epsilon: gl.getUniformLocation(program, "uEpsilon"),
          u_radius: gl.getUniformLocation(program, "uRadius"),
          u_n_colors: gl.getUniformLocation(program, "uN"),
          u_rgb_vals: gl.getUniformLocation(program, "rgb_vals"),
          u_mode: gl.getUniformLocation(program, "uMode")
        }
      };

      const texture = loadTexture(gl, img);
      var texture_coord_buffer = initTextureBuffer(gl);
      gl.pixelStorei(gl.UNPACK_FLIP_Y_WEBGL, true);

      var positionBuffer = gl.createBuffer();
      gl.bindBuffer(gl.ARRAY_BUFFER, positionBuffer);

      var positions = [
        -1, -1,
        -1, 1,
        1, 1,
        1, 1,
        1, -1,
        -1, -1,
      ];

      gl.bufferData(gl.ARRAY_BUFFER, new Float32Array(positions), gl.STATIC_DRAW);

      var fps_counter = document.getElementById("fps_counter");
      var elapsed_time = 0;

      function render(time) {
        gl.viewport(0, 0, gl.canvas.width, gl.canvas.height);
        gl.clearColor(0, 0, 0, 0);
        gl.clear(gl.COLOR_BUFFER_BIT);
        gl.useProgram(program);
        gl.enableVertexAttribArray(program_info.attribute_locations.vertex_position);
        gl.bindBuffer(gl.ARRAY_BUFFER, positionBuffer);
        // // Tell the attribute how to get data out of positionBuffer (ARRAY_BUFFER)
        var size = 2;          // 2 components per iteration
        var type = gl.FLOAT;   // the data is 32bit floats
        var normalize = false; // don't normalize the data
        var stride = 0;        // 0 = move forward size * sizeof(type) each iteration to get the next position
        var offset = 0;        // start at the beginning of the buffer
        gl.vertexAttribPointer(
          program_info.attribute_locations.vertex_position, size, type, normalize, stride, offset)

        setTextureAttribute(gl, texture_coord_buffer, program_info);

        gl.activeTexture(gl.TEXTURE0);
        gl.bindTexture(gl.TEXTURE_2D, texture);
        gl.uniform1i(program_info.uniformLocations.u_sampler, 0);

        gl.uniform2f(program_info.uniformLocations.u_resolution, canvas.width, canvas.height);
        gl.uniform1i(program_info.uniformLocations.u_kernel_size, kernel_size);
        gl.uniform1f(program_info.uniformLocations.u_sigma, sigma);
        gl.uniform1f(program_info.uniformLocations.u_k, k);
        gl.uniform1f(program_info.uniformLocations.u_tau, tau);
        gl.uniform1f(program_info.uniformLocations.u_phi, phi);
        gl.uniform1f(program_info.uniformLocations.u_epsilon, epsilon);
        gl.uniform1f(program_info.uniformLocations.u_radius, radius);
        gl.uniform1i(program_info.uniformLocations.u_n_colors, palette_size);
        gl.uniform1iv(program_info.uniformLocations.u_rgb_vals, new Int16Array(rgb_vals));
        gl.uniform1i(program_info.uniformLocations.u_mode, mode);

        var primitiveType = gl.TRIANGLES;
        var offset = 0;
        var count = 6;
        gl.drawArrays(primitiveType, offset, count);

        var fps = 1000 / (performance.now() - time);
        elapsed_time += performance.now() - time;
        if (elapsed_time > 200) {
          fps_counter.innerHTML = "FPS: " + Math.round(fps);
          elapsed_time = 0;
        }
      }

      requestAnimationFrame(render);
    }

    // main();

    function createProgram(gl, vs, fs) {
      const p = gl.createProgram();
      gl.attachShader(p, vs);
      gl.attachShader(p, fs);
      gl.linkProgram(p);
      return p;
    }

    function createShader(gl, type, src) {
      const s = gl.createShader(type);
      gl.shaderSource(s, src);
      gl.compileShader(s);
      if (!gl.getShaderParameter(s, gl.COMPILE_STATUS)) {
        console.error('An error occurred compiling the shaders: ' + gl.getShaderInfoLog(s));
        text = document.getElementById("log")
        text.innerHTML += gl.getShaderInfoLog(s) + "\n\n";
        gl.deleteShader(s);
        return null;
      }
      else {
        console.log("successfully loaded shader " + type);
        text = document.getElementById("log")
        text.innerHTML += "successfully loaded shader " + type + "\n\n";
      }
      return s;
    }
  </script>
</body>

</html>