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| 1 // Copyright 2015 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. |
| 4 |
| 5 |
| 6 // ======= Global state ======= |
| 7 |
| 8 var storedDelta = 0; |
| 9 var storedSeverity = 0; |
| 10 var storedType = 'PROTANOMALY'; |
| 11 var storedSimulate = false; |
| 12 var curFilter = 0; |
| 13 |
| 14 |
| 15 // ======= 3x3 matrix ops ======= |
| 16 |
| 17 var identityMatrix3x3 = [ |
| 18 [1, 0, 0], |
| 19 [0, 1, 0], |
| 20 [0, 0, 1] |
| 21 ]; |
| 22 |
| 23 |
| 24 /** |
| 25 * TODO(mustaq): JsDoc |
| 26 */ |
| 27 function add3x3(m1, m2) { |
| 28 var result = []; |
| 29 for (var i = 0; i < 3; i++) { |
| 30 result[i] = []; |
| 31 for (var j = 0; j < 3; j++) { |
| 32 result[i].push(m1[i][j] + m2[i][j]); |
| 33 } |
| 34 } |
| 35 return result; |
| 36 } |
| 37 |
| 38 |
| 39 /** |
| 40 * TODO(mustaq): JsDoc |
| 41 */ |
| 42 function sub3x3(m1, m2) { |
| 43 var result = []; |
| 44 for (var i = 0; i < 3; i++) { |
| 45 result[i] = []; |
| 46 for (var j = 0; j < 3; j++) { |
| 47 result[i].push(m1[i][j] - m2[i][j]); |
| 48 } |
| 49 } |
| 50 return result; |
| 51 } |
| 52 |
| 53 |
| 54 /** |
| 55 * TODO(mustaq): JsDoc |
| 56 */ |
| 57 function mul3x3(m1, m2) { |
| 58 var result = []; |
| 59 for (var i = 0; i < 3; i++) { |
| 60 result[i] = []; |
| 61 for (var j = 0; j < 3; j++) { |
| 62 var sum = 0; |
| 63 for (var k = 0; k < 3; k++) { |
| 64 sum += m1[i][k] * m2[k][j]; |
| 65 } |
| 66 result[i].push(sum); |
| 67 } |
| 68 } |
| 69 return result; |
| 70 } |
| 71 |
| 72 |
| 73 /** |
| 74 * TODO(mustaq): JsDoc |
| 75 */ |
| 76 function mul3x3Scalar(m, k) { |
| 77 var result = []; |
| 78 for (var i = 0; i < 3; i++) { |
| 79 result[i] = []; |
| 80 for (var j = 0; j < 3; j++) { |
| 81 result[i].push(k * m[i][j]); |
| 82 } |
| 83 } |
| 84 return result; |
| 85 } |
| 86 |
| 87 |
| 88 // ======= CVD parameters ======= |
| 89 /** |
| 90 * Parameters for simulating color vision deficiency. |
| 91 * Source: |
| 92 * http://www.inf.ufrgs.br/~oliveira/pubs_files/CVD_Simulation/CVD_Simulatio
n.html |
| 93 * Original Research Paper: |
| 94 * http://www.inf.ufrgs.br/~oliveira/pubs_files/CVD_Simulation/Machado_Olive
ira_Fernandes_CVD_Vis2009_final.pdf |
| 95 * |
| 96 * @enum {string} |
| 97 */ |
| 98 var cvdSimulationParams = { |
| 99 PROTANOMALY: [ |
| 100 [0.4720, -1.2946, 0.9857], |
| 101 [-0.6128, 1.6326, 0.0187], |
| 102 [0.1407, -0.3380, -0.0044], |
| 103 [-0.1420, 0.2488, 0.0044], |
| 104 [0.1872, -0.3908, 0.9942], |
| 105 [-0.0451, 0.1420, 0.0013], |
| 106 [0.0222, -0.0253, -0.0004], |
| 107 [-0.0290, -0.0201, 0.0006], |
| 108 [0.0068, 0.0454, 0.9990] |
| 109 ], |
| 110 DEUTERANOMALY: [ |
| 111 [0.5442, -1.1454, 0.9818], |
| 112 [-0.7091, 1.5287, 0.0238], |
| 113 [0.1650, -0.3833, -0.0055], |
| 114 [-0.1664, 0.4368, 0.0056], |
| 115 [0.2178, -0.5327, 0.9927], |
| 116 [-0.0514, 0.0958, 0.0017], |
| 117 [0.0180, -0.0288, -0.0006], |
| 118 [-0.0232, -0.0649, 0.0007], |
| 119 [0.0052, 0.0360, 0.9998] |
| 120 ], |
| 121 TRITANOMALY: [ |
| 122 [0.4275, -0.0181, 0.9307], |
| 123 [-0.2454, 0.0013, 0.0827], |
| 124 [-0.1821, 0.0168, -0.0134], |
| 125 [-0.1280, 0.0047, 0.0202], |
| 126 [0.0233, -0.0398, 0.9728], |
| 127 [0.1048, 0.0352, 0.0070], |
| 128 [-0.0156, 0.0061, 0.0071], |
| 129 [0.3841, 0.2947, 0.0151], |
| 130 [-0.3685, -0.3008, 0.9778] |
| 131 ] |
| 132 }; |
| 133 |
| 134 |
| 135 // TODO(mustaq): A common matrix for all types? E.g. Kevin's experiment |
| 136 // suggested: Mx[1][0] = 0.7+0.3*delta and Mx[2][0] = 0.7-0.3*delta |
| 137 /** |
| 138 * TODO(mustaq): JsDoc |
| 139 * |
| 140 * @enum {string} |
| 141 */ |
| 142 var cvdCorrectionParams = { |
| 143 PROTANOMALY: { |
| 144 addendum: [ |
| 145 [-1.0, 0.0, 0.0], |
| 146 [0.5, 1.0, 0.0], |
| 147 [1.5, 0.0, 1.0] |
| 148 ], |
| 149 delta_factor: [ |
| 150 [0.0, 0.0, 0.0], |
| 151 [1.0, 0.0, 0.0], |
| 152 [-1.0, 0.0, 0.0] |
| 153 ] |
| 154 }, |
| 155 DEUTERANOMALY: { |
| 156 addendum: [ |
| 157 [1.0, 0.5, 0.0], |
| 158 [0.5, -1.0, 0.0], |
| 159 [1.5, 1.5, 1.0] |
| 160 ], |
| 161 delta_factor: [ |
| 162 [0.0, 1.0, 0.0], |
| 163 [0.0, 0.0, 0.0], |
| 164 [0.0, -1.0, 0.0] |
| 165 ] |
| 166 }, |
| 167 TRITANOMALY: { |
| 168 addendum: [ |
| 169 [1.0, 0.0, 1.5], |
| 170 [0.0, 1.0, 0.5], |
| 171 [0.0, 0.0, -1.0] |
| 172 ], |
| 173 delta_factor: [ |
| 174 [0.0, 0.0, -1.0], |
| 175 [0.0, 0.0, 1.0], |
| 176 [0.0, 0.0, 0.0] |
| 177 ] |
| 178 } |
| 179 }; |
| 180 |
| 181 |
| 182 // ======= CVD matrix builders ======= |
| 183 |
| 184 /** |
| 185 * TODO(mustaq): JsDoc |
| 186 */ |
| 187 function getCvdSimulationMatrix(cvdType, severity) { |
| 188 var cvdSimulationParam = cvdSimulationParams[cvdType]; |
| 189 var severity2 = severity * severity; |
| 190 var matrix = []; |
| 191 for (var i = 0; i < 3; i++) { |
| 192 var row = []; |
| 193 for (var j = 0; j < 3; j++) { |
| 194 var paramRow = i*3+j; |
| 195 var val = cvdSimulationParam[paramRow][0] * severity2 |
| 196 + cvdSimulationParam[paramRow][1] * severity |
| 197 + cvdSimulationParam[paramRow][2]; |
| 198 row.push(val); |
| 199 } |
| 200 matrix.push(row); |
| 201 } |
| 202 return matrix; |
| 203 } |
| 204 |
| 205 |
| 206 /** |
| 207 * TODO(mustaq): JsDoc |
| 208 */ |
| 209 function getCvdCorrectionMatrix(cvdType, delta) { |
| 210 cvdCorrectionParam = cvdCorrectionParams[cvdType]; |
| 211 // TODO(mustaq): Perhaps nuke full-matrix operations after experiment. |
| 212 return add3x3(cvdCorrectionParam['addendum'], |
| 213 mul3x3Scalar(cvdCorrectionParam['delta_factor'], delta)); |
| 214 } |
| 215 |
| 216 |
| 217 /** |
| 218 * TODO(mustaq): JsDoc |
| 219 */ |
| 220 function getCvdMatrixAsString(cvdType, severity, delta, simulate) { |
| 221 var effectiveMatrix = getCvdSimulationMatrix(cvdType, severity); |
| 222 |
| 223 if (!simulate) { |
| 224 var cvdCorrectionMatrix = getCvdCorrectionMatrix(cvdType, delta); |
| 225 var tmpProduct = mul3x3(cvdCorrectionMatrix, effectiveMatrix); |
| 226 |
| 227 effectiveMatrix = sub3x3( |
| 228 add3x3(identityMatrix3x3, cvdCorrectionMatrix), |
| 229 tmpProduct); |
| 230 } |
| 231 |
| 232 var outputRows = []; |
| 233 for (var i = 0; i < 3; i++) { |
| 234 outputRows.push(effectiveMatrix[i].join(' ') + ' 0 0'); |
| 235 } |
| 236 // Add the alpha row |
| 237 outputRows.push('0 0 0 1 0'); |
| 238 return outputRows.join(' '); |
| 239 } |
| 240 |
| 241 |
| 242 // ======= Page linker ======= |
| 243 |
| 244 var svgDefaultMatrix = |
| 245 '1 0 0 0 0 ' + |
| 246 '0 1 0 0 0 ' + |
| 247 '0 0 1 0 0 ' + |
| 248 '0 0 0 1 0'; |
| 249 |
| 250 var svgContent = |
| 251 '<svg xmlns='http://www.w3.org/2000/svg' version='1.1'>' + |
| 252 ' <defs>' + |
| 253 ' <filter id='cvd_extension_0'>' + |
| 254 ' <feColorMatrix id='cvd_filter_matrix_0' type='matrix' values='' + |
| 255 svgDefaultMatrix + ''/>' + |
| 256 ' </filter>' + |
| 257 ' <filter id='cvd_extension_1'>' + |
| 258 ' <feColorMatrix id='cvd_filter_matrix_1' type='matrix' values='' + |
| 259 svgDefaultMatrix + ''/>' + |
| 260 ' </filter>' + |
| 261 ' </defs>' + |
| 262 '</svg>'; |
| 263 |
| 264 /** |
| 265 * Checks for svg filter matrix presence and append to DOM if not present. |
| 266 */ |
| 267 function addSvgIfMissing() { |
| 268 var wrap = document.getElementById('cvd_extension_svg_filter'); |
| 269 if (!wrap) { |
| 270 wrap = document.createElement('span'); |
| 271 wrap.id = 'cvd_extension_svg_filter'; |
| 272 wrap.setAttribute('hidden', ''); |
| 273 wrap.innerHTML = svgContent; |
| 274 document.body.appendChild(wrap); |
| 275 } |
| 276 } |
| 277 |
| 278 |
| 279 /** |
| 280 * Update matrix when config values change. |
| 281 */ |
| 282 function update() { |
| 283 if (!document.body) { |
| 284 document.addEventListener('DOMContentLoaded', update); |
| 285 return; |
| 286 } |
| 287 addSvgIfMissing(); |
| 288 var next = 1 - curFilter; |
| 289 |
| 290 debugPrint( |
| 291 'Setting matrix#' + next + ' to ' + |
| 292 getCvdMatrixAsString( |
| 293 storedType, storedSeverity, storedDelta, storedSimulate)); |
| 294 |
| 295 var matrix = document.getElementById('cvd_filter_matrix_' + next); |
| 296 matrix.setAttribute( |
| 297 'values', getCvdMatrixAsString( |
| 298 storedType, storedSeverity, storedDelta, storedSimulate)); |
| 299 |
| 300 var html = document.documentElement; |
| 301 html.classList.remove('filter' + curFilter); |
| 302 html.offsetTop; |
| 303 html.classList.add('filter' + next); |
| 304 |
| 305 curFilter = next; |
| 306 |
| 307 // TODO(wnwen): Figure out whether this hack is still necessary. |
| 308 window.scrollBy(0, 1); |
| 309 window.scrollBy(0, -1); |
| 310 } |
| 311 |
| 312 |
| 313 /** |
| 314 * Process request from background page. |
| 315 */ |
| 316 function onExtensionMessage(request) { |
| 317 var changed = false; |
| 318 |
| 319 if (request['delta'] !== undefined) { |
| 320 var delta = request.delta; |
| 321 if (storedDelta != delta) { |
| 322 storedDelta = delta; |
| 323 changed = true; |
| 324 } |
| 325 } |
| 326 |
| 327 if (request['severity'] !== undefined) { |
| 328 var severity = request.severity; |
| 329 if (storedSeverity != severity) { |
| 330 storedSeverity = severity; |
| 331 changed = true; |
| 332 } |
| 333 } |
| 334 |
| 335 if (request['type'] !== undefined) { |
| 336 var type = request.type; |
| 337 if (storedType != type) { |
| 338 storedType = type; |
| 339 changed = true; |
| 340 } |
| 341 } |
| 342 |
| 343 if (request['simulate'] !== undefined) { |
| 344 var simulate = request.simulate; |
| 345 if (storedSimulate != simulate) { |
| 346 storedSimulate = simulate; |
| 347 changed = true; |
| 348 } |
| 349 } |
| 350 |
| 351 if (changed) |
| 352 update(); |
| 353 } |
| 354 |
| 355 |
| 356 /** |
| 357 * Prepare to process background messages and let it know to send initial |
| 358 * values. |
| 359 */ |
| 360 (function initialize() { |
| 361 chrome.extension.onRequest.addListener(onExtensionMessage); |
| 362 chrome.extension.sendRequest({'init': true}, onExtensionMessage); |
| 363 })(); |
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