| 1 | /* This Source Code Form is subject to the terms of the Mozilla Public |
| 2 | * License, v. 2.0. If a copy of the MPL was not distributed with this file, |
| 3 | * You can obtain one at http://mozilla.org/MPL/2.0/. */ |
| 4 | |
| 5 | // Get the best-available indexedDB object. |
| 6 | var iDB = window.indexedDB || window.webkitIndexedDB || window.mozIndexedDB || window.msIndexedDB; |
| 7 | var mainDB; |
| 8 | |
| 9 | var gMainCanvas, gMainContext; |
| 10 | var gColorPalette = []; |
| 11 | var gStartTime = 0; |
| 12 | var gCurrentImageData; |
| 13 | var gLastImageData; |
| 14 | |
| 15 | function Startup() { |
| 16 | initDB(); |
| 17 | |
| 18 | gMainCanvas = document.getElementById("mbrotImage"); |
| 19 | gMainContext = gMainCanvas.getContext("2d"); |
| 20 | |
| 21 | gMainCanvas.addEventListener("mouseup", imgEvHandler, false); |
| 22 | gMainCanvas.addEventListener("mousedown", imgEvHandler, false); |
| 23 | gMainCanvas.addEventListener("mousemove", imgEvHandler, false); |
| 24 | gMainCanvas.addEventListener("touchstart", imgEvHandler, false); |
| 25 | gMainCanvas.addEventListener("touchend", imgEvHandler, false); |
| 26 | gMainCanvas.addEventListener("touchcancel", imgEvHandler, false); |
| 27 | gMainCanvas.addEventListener("touchleave", imgEvHandler, false); |
| 28 | gMainCanvas.addEventListener("touchmove", imgEvHandler, false); |
| 29 | |
| 30 | var initTile = new Image(); |
| 31 | initTile.src = "style/initial-overview.png"; |
| 32 | gMainContext.drawImage(initTile, 0, 0); |
| 33 | } |
| 34 | |
| 35 | function initDB() { |
| 36 | // Open DB. |
| 37 | var request = iDB.open("MainDB", 1); |
| 38 | request.onerror = function(event) { |
| 39 | // Errors can be handled here. Error codes explain in: |
| 40 | // https://developer.mozilla.org/en/IndexedDB/IDBDatabaseException#Constants |
| 41 | //document.getElementById("debug").textContent = |
| 42 | // "error opening mainDB: " + event.target.errorCode; |
| 43 | }; |
| 44 | request.onsuccess = function(event) { |
| 45 | //document.getElementById("debug").textContent = "mainDB opened."; |
| 46 | mainDB = request.result; |
| 47 | }; |
| 48 | request.onupgradeneeded = function(event) { |
| 49 | mainDB = request.result; |
| 50 | //document.getElementById("debug").textContent = "mainDB upgraded."; |
| 51 | // Create a "prefs" objectStore. |
| 52 | var prefsStore = mainDB.createObjectStore("prefs"); |
| 53 | // Create a "bookmarks" objectStore. |
| 54 | var bmStore = mainDB.createObjectStore("bookmarks"); |
| 55 | mainDB.onversionchange = function(event) { |
| 56 | mainDB.close(); |
| 57 | mainDB = undefined; |
| 58 | initDB(); |
| 59 | }; |
| 60 | }; |
| 61 | } |
| 62 | |
| 63 | function getAdjustVal(aName) { |
| 64 | var value; |
| 65 | switch (aName) { |
| 66 | case "image.width": |
| 67 | case "image.height": |
| 68 | value = 0; |
| 69 | try { |
| 70 | value = document.getElementById(aName.replace(".", "_")).value; |
| 71 | } |
| 72 | catch (e) { } |
| 73 | if ((value < 10) || (value > 5000)) { |
| 74 | value = 300; |
| 75 | gPrefs.set(prefname, value); |
| 76 | //document.getElementById(aName.replace(".", "_")).value = value; |
| 77 | } |
| 78 | return value; |
| 79 | case "last_image.Cr_*": |
| 80 | var Cr_min = -2.0; |
| 81 | var Cr_max = 1.0; |
| 82 | try { |
| 83 | Cr_min = parseFloat(document.getElementById("Cr_min").value); |
| 84 | Cr_max = parseFloat(document.getElementById("Cr_max").value); |
| 85 | } |
| 86 | catch (e) { } |
| 87 | if ((Cr_min < -3) || (Cr_min > 2) || |
| 88 | (Cr_max < -3) || (Cr_max > 2) || (Cr_min >= Cr_max)) { |
| 89 | Cr_min = -2.0; Cr_max = 1.0; |
| 90 | } |
| 91 | gPrefs.set("Cr_min", Cr_min); |
| 92 | gPrefs.set("Cr_max", Cr_max); |
| 93 | document.getElementById("Cr_min").value = Cr_min; |
| 94 | document.getElementById("Cr_max").value = Cr_max; |
| 95 | return {Cr_min: Cr_min, Cr_max: Cr_max}; |
| 96 | case "last_image.Ci_*": |
| 97 | var Ci_min = -1.5; |
| 98 | var Ci_max = 1.5; |
| 99 | try { |
| 100 | Ci_min = parseFloat(document.getElementById("Ci_min").value); |
| 101 | Ci_max = parseFloat(document.getElementById("Ci_max").value); |
| 102 | } |
| 103 | catch (e) { } |
| 104 | if ((Ci_min < -2.5) || (Ci_min > 2.5) || |
| 105 | (Ci_max < -2.5) || (Ci_max > 2.5) || (Ci_min >= Ci_max)) { |
| 106 | Ci_min = -1.5; Ci_max = 1.5; |
| 107 | } |
| 108 | gPrefs.set("Ci_min", Ci_min); |
| 109 | gPrefs.set("Ci_max", Ci_max); |
| 110 | document.getElementById("Ci_min").value = Ci_min; |
| 111 | document.getElementById("Ci_max").value = Ci_max; |
| 112 | return {Ci_min: Ci_min, Ci_max: Ci_max}; |
| 113 | case "iteration_max": |
| 114 | value = 500; |
| 115 | try { |
| 116 | value = document.getElementById("iterMax").value; |
| 117 | } |
| 118 | catch (e) { |
| 119 | setIter(value); |
| 120 | } |
| 121 | if (value < 10 || value > 10000) { |
| 122 | value = 500; |
| 123 | setIter(value); |
| 124 | } |
| 125 | return value; |
| 126 | case "use_algorithm": |
| 127 | value = "numeric"; |
| 128 | try { |
| 129 | value = document.getElementById("algorithm").value; |
| 130 | } |
| 131 | catch (e) { |
| 132 | setAlgorithm(value); |
| 133 | } |
| 134 | return value; |
| 135 | case "color_palette": |
| 136 | value = "kairo"; |
| 137 | try { |
| 138 | value = document.getElementById("palette").value; |
| 139 | } |
| 140 | catch(e) { |
| 141 | setPalette(value); |
| 142 | } |
| 143 | return value; |
| 144 | case "syncProportions": |
| 145 | value = true; |
| 146 | try { |
| 147 | value = document.getElementById("proportional").value; |
| 148 | } |
| 149 | catch(e) { |
| 150 | gPrefs.set(prefname, value); |
| 151 | document.getElementById("proportional").value = value; |
| 152 | } |
| 153 | return value; |
| 154 | default: |
| 155 | return false; |
| 156 | } |
| 157 | } |
| 158 | |
| 159 | function setVal(aName, aValue) { |
| 160 | switch (aName) { |
| 161 | case "image.width": |
| 162 | case "image.height": |
| 163 | gPrefs.set(aName, value); |
| 164 | document.getElementById(aName.replace(".", "_")).value = value; |
| 165 | break; |
| 166 | case "last_image.Cr_*": |
| 167 | gPrefs.set("Cr_min", Cr_min); |
| 168 | gPrefs.set("Cr_max", Cr_max); |
| 169 | document.getElementById("Cr_min").value = aValue.Cr_min; |
| 170 | document.getElementById("Cr_max").value = aValue.Cr_max; |
| 171 | break; |
| 172 | case "last_image.Ci_*": |
| 173 | gPrefs.set("Ci_min", Ci_min); |
| 174 | gPrefs.set("Ci_max", Ci_max); |
| 175 | document.getElementById("Ci_min").value = aValue.Ci_min; |
| 176 | document.getElementById("Ci_max").value = aValue.Ci_max; |
| 177 | break; |
| 178 | case "iteration_max": |
| 179 | setIter(aValue); |
| 180 | break; |
| 181 | case "use_algorithm": |
| 182 | setAlgorithm(aValue); |
| 183 | break; |
| 184 | case "color_palette": |
| 185 | setPalette(valueaValue); |
| 186 | break; |
| 187 | case "syncProportions": |
| 188 | gPrefs.set(aName, value); |
| 189 | document.getElementById("proportional").value = aValue; |
| 190 | break; |
| 191 | } |
| 192 | } |
| 193 | |
| 194 | function adjustCoordsAndDraw(aC_min, aC_max) { |
| 195 | var iWidth = getAdjustVal("image.width"); |
| 196 | var iHeight = getAdjustVal("image.height"); |
| 197 | |
| 198 | // correct coordinates |
| 199 | if (aC_min.r < -2) |
| 200 | aC_min.r = -2; |
| 201 | if (aC_max.r > 2) |
| 202 | aC_max.r = 2; |
| 203 | if ((aC_min.r > 2) || (aC_max.r < -2) || (aC_min.r >= aC_max.r)) { |
| 204 | aC_min.r = -2.0; aC_max.r = 1.0; |
| 205 | } |
| 206 | if (aC_min.i < -2) |
| 207 | aC_min.i = -2; |
| 208 | if (aC_max.i > 2) |
| 209 | aC_max.i = 2; |
| 210 | if ((aC_min.i > 2) || (aC_max.i < -2) || (aC_min.i >= aC_max.i)) { |
| 211 | aC_min.i = -1.3; aC_max.i = 1.3; |
| 212 | } |
| 213 | |
| 214 | var CWidth = aC_max.r - aC_min.r; |
| 215 | var CHeight = aC_max.i - aC_min.i; |
| 216 | var C_mid = new complex(aC_min.r + CWidth / 2, aC_min.i + CHeight / 2); |
| 217 | |
| 218 | var CRatio = Math.max(CWidth / iWidth, CHeight / iHeight); |
| 219 | |
| 220 | setVal("last_image.Cr_*", {Cr_min: C_mid.r - iWidth * CRatio / 2, |
| 221 | Cr_max: C_mid.r + iWidth * CRatio / 2}); |
| 222 | setVal("last_image.Ci_*", {Ci_min: C_mid.i - iHeight * CRatio / 2, |
| 223 | Ci_max: C_mid.i + iHeight * CRatio / 2}); |
| 224 | |
| 225 | drawImage(); |
| 226 | } |
| 227 | |
| 228 | function drawImage() { |
| 229 | var canvas = gMainCanvas; |
| 230 | var context = gMainContext; |
| 231 | |
| 232 | document.getElementById("calcTime").textContent = "--"; |
| 233 | |
| 234 | if (gCurrentImageData) { |
| 235 | gLastImageData = gCurrentImageData; |
| 236 | document.getElementById("backButton").disabled = false; |
| 237 | } |
| 238 | |
| 239 | gColorPalette = getColorPalette(document.getElementById("palette").value); |
| 240 | |
| 241 | var Cr_vals = getAdjustVal("last_image.Cr_*"); |
| 242 | var Cr_min = Cr_vals.Cr_min; |
| 243 | var Cr_max = Cr_vals.Cr_max; |
| 244 | |
| 245 | var Ci_vals = getAdjustVal("last_image.Ci_*"); |
| 246 | var Ci_min = Ci_vals.Ci_min; |
| 247 | var Ci_max = Ci_vals.Ci_max; |
| 248 | |
| 249 | var iterMax = getAdjustVal("iteration_max"); |
| 250 | var algorithm = getAdjustVal("use_algorithm"); |
| 251 | |
| 252 | var iWidth = canvas.width; |
| 253 | if ((iWidth < 10) || (iWidth > 5000)) { |
| 254 | iWidth = 300; |
| 255 | canvas.width = iWidth; |
| 256 | } |
| 257 | var iHeight = canvas.height; |
| 258 | if ((iHeight < 10) || (iHeight > 5000)) { |
| 259 | iHeight = 300; |
| 260 | canvas.height = iHeight; |
| 261 | } |
| 262 | |
| 263 | gCurrentImageData = { |
| 264 | C_min: new complex(Cr_min, Ci_min), |
| 265 | C_max: new complex(Cr_max, Ci_max), |
| 266 | iWidth: iWidth, |
| 267 | iHeight: iHeight, |
| 268 | iterMax: iterMax |
| 269 | }; |
| 270 | |
| 271 | context.fillStyle = "rgba(255, 255, 255, 127)"; |
| 272 | context.fillRect(0, 0, canvas.width, canvas.height); |
| 273 | |
| 274 | gStartTime = new Date(); |
| 275 | |
| 276 | drawLine(0, [Cr_min, Cr_max, Ci_min, Ci_max], |
| 277 | canvas, context, iterMax, algorithm); |
| 278 | } |
| 279 | |
| 280 | function drawLine(line, dimensions, canvas, context, iterMax, algorithm) { |
| 281 | var Cr_min = dimensions[0]; |
| 282 | var Cr_max = dimensions[1]; |
| 283 | var Cr_scale = Cr_max - Cr_min; |
| 284 | |
| 285 | var Ci_min = dimensions[2]; |
| 286 | var Ci_max = dimensions[3]; |
| 287 | var Ci_scale = Ci_max - Ci_min; |
| 288 | |
| 289 | var lines = Math.min(canvas.height - line, 8); |
| 290 | var imageData = context.createImageData(canvas.width, lines); |
| 291 | var pixels = imageData.data; |
| 292 | var idx = 0; |
| 293 | for (var img_y = line; img_y < canvas.height && img_y < line+8; img_y++) |
| 294 | for (var img_x = 0; img_x < canvas.width; img_x++) { |
| 295 | var C = new complex(Cr_min + (img_x / canvas.width) * Cr_scale, |
| 296 | Ci_min + (img_y / canvas.height) * Ci_scale); |
| 297 | var colors = drawPoint(context, img_x, img_y, C, iterMax, algorithm); |
| 298 | pixels[idx++] = colors[0]; |
| 299 | pixels[idx++] = colors[1]; |
| 300 | pixels[idx++] = colors[2]; |
| 301 | pixels[idx++] = colors[3]; |
| 302 | } |
| 303 | context.putImageData(imageData, 0, line); |
| 304 | |
| 305 | if (img_y < canvas.height) |
| 306 | setTimeout(drawLine, 0, img_y, dimensions, canvas, context, iterMax, algorithm); |
| 307 | else if (gStartTime) |
| 308 | EndCalc(); |
| 309 | } |
| 310 | |
| 311 | function EndCalc() { |
| 312 | var endTime = new Date(); |
| 313 | var timeUsed = (endTime.getTime() - gStartTime.getTime()) / 1000; |
| 314 | document.getElementById("calcTime").textContent = timeUsed.toFixed(3) + " seconds"; |
| 315 | } |
| 316 | |
| 317 | function complex(aReal, aImag) { |
| 318 | this.r = aReal; |
| 319 | this.i = aImag; |
| 320 | } |
| 321 | complex.prototype = { |
| 322 | square: function() { |
| 323 | return new complex(this.r * this.r - this.i * this.i, |
| 324 | 2 * this.r * this.i); |
| 325 | }, |
| 326 | dist: function() { |
| 327 | return Math.sqrt(this.r * this.r + this.i * this.i); |
| 328 | }, |
| 329 | add: function(aComplex) { |
| 330 | return new complex(this.r + aComplex.r, this.i + aComplex.i); |
| 331 | } |
| 332 | } |
| 333 | |
| 334 | function mandelbrotValueOO (aC, aIterMax) { |
| 335 | // this would be nice code in general but it looks like JS objects are too heavy for normal use. |
| 336 | var Z = new complex(0.0, 0.0); |
| 337 | for (var iter = 0; iter < aIterMax; iter++) { |
| 338 | Z = Z.square().add(aC); |
| 339 | if (Z.r * Z.r + Z.i * Z.i > 256) { break; } |
| 340 | } |
| 341 | return iter; |
| 342 | } |
| 343 | |
| 344 | function mandelbrotValueNumeric (aC, aIterMax) { |
| 345 | // optimized numeric code for fast calculation |
| 346 | var Cr = aC.r, Ci = aC.i; |
| 347 | var Zr = 0.0, Zi = 0.0; |
| 348 | var Zr2 = Zr * Zr, Zi2 = Zi * Zi; |
| 349 | for (var iter = 0; iter < aIterMax; iter++) { |
| 350 | Zi = 2 * Zr * Zi + Ci; |
| 351 | Zr = Zr2 - Zi2 + Cr; |
| 352 | |
| 353 | Zr2 = Zr * Zr; Zi2 = Zi * Zi; |
| 354 | if (Zr2 + Zi2 > 256) { break; } |
| 355 | } |
| 356 | return iter; |
| 357 | } |
| 358 | |
| 359 | function getColor(aIterValue, aIterMax) { |
| 360 | var standardizedValue = Math.round(aIterValue * 1024 / aIterMax); |
| 361 | if (gColorPalette && gColorPalette.length) |
| 362 | return gColorPalette[standardizedValue]; |
| 363 | |
| 364 | // fallback to simple b/w if for some reason we don't have a palette |
| 365 | if (aIterValue == aIterMax) |
| 366 | return [0, 0, 0, 255]; |
| 367 | else |
| 368 | return [255, 255, 255, 255]; |
| 369 | } |
| 370 | |
| 371 | function getColorPalette(palName) { |
| 372 | var palette = []; |
| 373 | switch (palName) { |
| 374 | case 'bw': |
| 375 | for (var i = 0; i < 1024; i++) { |
| 376 | palette[i] = [255, 255, 255, 255]; |
| 377 | } |
| 378 | palette[1024] = [0, 0, 0, 255]; |
| 379 | break; |
| 380 | case 'kairo': |
| 381 | // outer areas |
| 382 | for (var i = 0; i < 32; i++) { |
| 383 | var cc1 = Math.floor(i * 127 / 31); |
| 384 | var cc2 = 170 - Math.floor(i * 43 / 31); |
| 385 | palette[i] = [cc1, cc2, cc1, 255]; |
| 386 | } |
| 387 | // inner areas |
| 388 | for (var i = 0; i < 51; i++) { |
| 389 | var cc = Math.floor(i * 170 / 50); |
| 390 | palette[32 + i] = [cc, 0, (170-cc), 255]; |
| 391 | } |
| 392 | // corona |
| 393 | for (var i = 0; i < 101; i++) { |
| 394 | var cc = Math.floor(i * 200 / 100); |
| 395 | palette[83 + i] = [255, cc, 0, 255]; |
| 396 | } |
| 397 | // inner corona |
| 398 | for (var i = 0; i < 201; i++) { |
| 399 | var cc1 = 255 - Math.floor(i * 85 / 200); |
| 400 | var cc2 = 200 - Math.floor(i * 30 / 200); |
| 401 | var cc3 = Math.floor(i * 170 / 200); |
| 402 | palette[184 + i] = [cc1, cc2, cc3, 255]; |
| 403 | } |
| 404 | for (var i = 0; i < 301; i++) { |
| 405 | var cc1 = 170 - Math.floor(i * 43 / 300); |
| 406 | var cc2 = 170 + Math.floor(i * 85 / 300); |
| 407 | palette[385 + i] = [cc1, cc1, cc2, 255]; |
| 408 | } |
| 409 | for (var i = 0; i < 338; i++) { |
| 410 | var cc = 127 + Math.floor(i * 128 / 337); |
| 411 | palette[686 + i] = [cc, cc, 255, 255]; |
| 412 | } |
| 413 | palette[1024] = [0, 0, 0, 255]; |
| 414 | break; |
| 415 | case 'rainbow-linear1': |
| 416 | for (var i = 0; i < 256; i++) { |
| 417 | palette[i] = [i, 0, 0, 255]; |
| 418 | palette[256 + i] = [255, i, 0, 255]; |
| 419 | palette[512 + i] = [255 - i, 255, i, 255]; |
| 420 | palette[768 + i] = [i, 255-i, 255, 255]; |
| 421 | } |
| 422 | palette[1024] = [0, 0, 0, 255]; |
| 423 | break; |
| 424 | case 'rainbow-squared1': |
| 425 | for (var i = 0; i < 34; i++) { |
| 426 | var cc = Math.floor(i * 255 / 33); |
| 427 | palette[i] = [cc, 0, 0, 255]; |
| 428 | } |
| 429 | for (var i = 0; i < 137; i++) { |
| 430 | var cc = Math.floor(i * 255 / 136); |
| 431 | palette[34 + i] = [255, cc, 0, 255]; |
| 432 | } |
| 433 | for (var i = 0; i < 307; i++) { |
| 434 | var cc = Math.floor(i * 255 / 306); |
| 435 | palette[171 + i] = [255 - cc, 255, cc, 255]; |
| 436 | } |
| 437 | for (var i = 0; i < 546; i++) { |
| 438 | var cc = Math.floor(i * 255 / 545); |
| 439 | palette[478 + i] = [cc, 255 - cc, 255, 255]; |
| 440 | } |
| 441 | palette[1024] = [0, 0, 0, 255]; |
| 442 | break; |
| 443 | case 'rainbow-linear2': |
| 444 | for (var i = 0; i < 205; i++) { |
| 445 | var cc = Math.floor(i * 255 / 204); |
| 446 | palette[i] = [255, cc, 0, 255]; |
| 447 | palette[204 + i] = [255 - cc, 255, 0, 255]; |
| 448 | palette[409 + i] = [0, 255, cc, 255]; |
| 449 | palette[614 + i] = [0, 255 - cc, 255, 255]; |
| 450 | palette[819 + i] = [cc, 0, 255, 255]; |
| 451 | } |
| 452 | palette[1024] = [0, 0, 0, 255]; |
| 453 | break; |
| 454 | case 'rainbow-squared2': |
| 455 | for (var i = 0; i < 19; i++) { |
| 456 | var cc = Math.floor(i * 255 / 18); |
| 457 | palette[i] = [255, cc, 0, 255]; |
| 458 | } |
| 459 | for (var i = 0; i < 74; i++) { |
| 460 | var cc = Math.floor(i * 255 / 73); |
| 461 | palette[19 + i] = [255 - cc, 255, 0, 255]; |
| 462 | } |
| 463 | for (var i = 0; i < 168; i++) { |
| 464 | var cc = Math.floor(i * 255 / 167); |
| 465 | palette[93 + i] = [0, 255, cc, 255]; |
| 466 | } |
| 467 | for (var i = 0; i < 298; i++) { |
| 468 | var cc = Math.floor(i * 255 / 297); |
| 469 | palette[261 + i] = [0, 255 - cc, 255, 255]; |
| 470 | } |
| 471 | for (var i = 0; i < 465; i++) { |
| 472 | var cc = Math.floor(i * 255 / 464); |
| 473 | palette[559 + i] = [cc, 0, 255, 255]; |
| 474 | } |
| 475 | palette[1024] = [0, 0, 0, 255]; |
| 476 | break; |
| 477 | } |
| 478 | return palette; |
| 479 | } |
| 480 | |
| 481 | function drawPoint(context, img_x, img_y, C, iterMax, algorithm) { |
| 482 | var itVal; |
| 483 | switch (algorithm) { |
| 484 | case 'oo': |
| 485 | itVal = mandelbrotValueOO(C, iterMax); |
| 486 | break; |
| 487 | case 'numeric': |
| 488 | default: |
| 489 | itVal = mandelbrotValueNumeric(C, iterMax); |
| 490 | break; |
| 491 | } |
| 492 | return getColor(itVal, iterMax); |
| 493 | } |
| 494 | |
| 495 | // ########## UI functions ########## |
| 496 | |
| 497 | var zoomstart; |
| 498 | var imgBackup; |
| 499 | var zoomTouchID; |
| 500 | |
| 501 | var imgEvHandler = { |
| 502 | handleEvent: function(aEvent) { |
| 503 | var canvas = document.getElementById("mbrotImage"); |
| 504 | var context = canvas.getContext("2d"); |
| 505 | var touchEvent = aEvent.type.indexOf('touch') != -1; |
| 506 | |
| 507 | // Bail out if this is neither a touch nor left-click. |
| 508 | if (!touchEvent && aEvent.button != 0) |
| 509 | return; |
| 510 | |
| 511 | // Bail out if the started touch can't be found. |
| 512 | if (touchEvent && zoomstart && |
| 513 | !aEvent.changedTouches.identifiedTouch(zoomTouchID)) |
| 514 | return; |
| 515 | |
| 516 | var coordObj = touchEvent ? |
| 517 | aEvent.changedTouches.identifiedTouch(zoomTouchID) : |
| 518 | aEvent; |
| 519 | |
| 520 | switch (aEvent.type) { |
| 521 | case 'mousedown': |
| 522 | case 'touchstart': |
| 523 | if (touchEvent) { |
| 524 | zoomTouchID = aEvent.changedTouches.item(0).identifier; |
| 525 | coordObj = aEvent.changedTouches.identifiedTouch(zoomTouchID); |
| 526 | } |
| 527 | // left button - start dragzoom |
| 528 | zoomstart = {x: coordObj.clientX - canvas.offsetLeft, |
| 529 | y: coordObj.clientY - canvas.offsetTop}; |
| 530 | imgBackup = context.getImageData(0, 0, canvas.width, canvas.height); |
| 531 | break; |
| 532 | case 'mouseup': |
| 533 | case 'touchend': |
| 534 | if (zoomstart) { |
| 535 | context.putImageData(imgBackup, 0, 0); |
| 536 | var zoomend = {x: coordObj.clientX - canvas.offsetLeft, |
| 537 | y: coordObj.clientY - canvas.offsetTop}; |
| 538 | |
| 539 | // make sure zoomend is bigger than zoomstart |
| 540 | if ((zoomend.x == zoomstart.x) || (zoomend.y == zoomstart.y)) { |
| 541 | // cannot zoom what has no area, discard it |
| 542 | zoomstart = undefined; |
| 543 | return; |
| 544 | } |
| 545 | if (zoomend.x < zoomstart.x) |
| 546 | [zoomend.x, zoomstart.x] = [zoomstart.x, zoomend.x]; |
| 547 | if (zoomend.y < zoomstart.y) |
| 548 | [zoomend.y, zoomstart.y] = [zoomstart.y, zoomend.y]; |
| 549 | |
| 550 | if (gCurrentImageData) { |
| 551 | // determine new "coordinates" |
| 552 | var CWidth = gCurrentImageData.C_max.r - gCurrentImageData.C_min.r; |
| 553 | var CHeight = gCurrentImageData.C_max.i - gCurrentImageData.C_min.i; |
| 554 | var newC_min = new complex( |
| 555 | gCurrentImageData.C_min.r + zoomstart.x / gCurrentImageData.iWidth * CWidth, |
| 556 | gCurrentImageData.C_min.i + zoomstart.y / gCurrentImageData.iHeight * CHeight); |
| 557 | var newC_max = new complex( |
| 558 | gCurrentImageData.C_min.r + zoomend.x / gCurrentImageData.iWidth * CWidth, |
| 559 | gCurrentImageData.C_min.i + zoomend.y / gCurrentImageData.iHeight * CHeight); |
| 560 | } |
| 561 | else { |
| 562 | var newC_min = new complex(-2, -1.5); |
| 563 | var newC_max = new complex(1, 1.5); |
| 564 | } |
| 565 | |
| 566 | adjustCoordsAndDraw(newC_min, newC_max); |
| 567 | } |
| 568 | zoomstart = undefined; |
| 569 | break; |
| 570 | case 'mousemove': |
| 571 | case 'touchmove': |
| 572 | if (zoomstart) { |
| 573 | context.putImageData(imgBackup, 0, 0); |
| 574 | context.strokeStyle = "rgb(255,255,31)"; |
| 575 | context.strokeRect(zoomstart.x, zoomstart.y, |
| 576 | coordObj.clientX - canvas.offsetLeft - zoomstart.x, |
| 577 | coordObj.clientY - canvas.offsetTop - zoomstart.y); |
| 578 | } |
| 579 | break; |
| 580 | } |
| 581 | } |
| 582 | }; |
| 583 | |
| 584 | function drawIfEmpty() { |
| 585 | if (!gCurrentImageData) { |
| 586 | drawImage(); |
| 587 | } |
| 588 | } |
| 589 | |
| 590 | function toggleSettings() { |
| 591 | var fs = document.getElementById("settings"); |
| 592 | if (fs.style.display != "block") { |
| 593 | fs.style.display = "block"; |
| 594 | } |
| 595 | else { |
| 596 | fs.style.display = "none"; |
| 597 | } |
| 598 | } |
| 599 | |
| 600 | function goBack() { |
| 601 | if (gLastImageData) { |
| 602 | document.getElementById("iterMax").value = gLastImageData.iterMax; |
| 603 | // use gLastImageData.iWidth, gLastImageData.iHeight ??? |
| 604 | adjustCoordsAndDraw(gLastImageData.C_min, gLastImageData.C_max); |
| 605 | gLastImageData = undefined; |
| 606 | document.getElementById("backButton").disabled = true; |
| 607 | } |
| 608 | } |
| 609 | |
| 610 | function setIter(aIter) { |
| 611 | gPrefs.set("iteration_max", aIter); |
| 612 | document.getElementById("iterMax").value = aIter; |
| 613 | } |
| 614 | |
| 615 | function setPalette(aPaletteID) { |
| 616 | gPrefs.set("color_palette", aPaletteID); |
| 617 | document.getElementById("palette").value = aPaletteID; |
| 618 | gColorPalette = getColorPalette(aPaletteID); |
| 619 | } |
| 620 | |
| 621 | function setAlgorithm(algoID) { |
| 622 | gPrefs.set("use_algorithm", algoID); |
| 623 | //document.getElementById("algorithm").value = algoID; |
| 624 | } |
| 625 | |
| 626 | var gPrefs = { |
| 627 | objStore: "prefs", |
| 628 | |
| 629 | get: function(aKey, aCallback) { |
| 630 | if (!mainDB) |
| 631 | return; |
| 632 | var transaction = mainDB.transaction([this.objStore]); |
| 633 | var request = transaction.objectStore(this.objStore).get(aKey); |
| 634 | request.onsuccess = function(event) { |
| 635 | aCallback(request.result, event); |
| 636 | }; |
| 637 | request.onerror = function(event) { |
| 638 | // Errors can be handled here. |
| 639 | aCallback(undefined, event); |
| 640 | }; |
| 641 | }, |
| 642 | |
| 643 | set: function(aKey, aValue, aCallback) { |
| 644 | if (!mainDB) |
| 645 | return; |
| 646 | var success = false; |
| 647 | var transaction = mainDB.transaction([this.objStore], "readwrite"); |
| 648 | var objStore = transaction.objectStore(this.objStore); |
| 649 | var request = objStore.put(aValue, aKey); |
| 650 | request.onsuccess = function(event) { |
| 651 | success = true; |
| 652 | if (aCallback) |
| 653 | aCallback(success, event); |
| 654 | }; |
| 655 | request.onerror = function(event) { |
| 656 | // Errors can be handled here. |
| 657 | if (aCallback) |
| 658 | aCallback(success, event); |
| 659 | }; |
| 660 | }, |
| 661 | |
| 662 | unset: function(aKey, aCallback) { |
| 663 | if (!mainDB) |
| 664 | return; |
| 665 | var success = false; |
| 666 | var transaction = mainDB.transaction([this.objStore], "readwrite"); |
| 667 | var request = transaction.objectStore(this.objStore).delete(aKey); |
| 668 | request.onsuccess = function(event) { |
| 669 | success = true; |
| 670 | if (aCallback) |
| 671 | aCallback(success, event); |
| 672 | }; |
| 673 | request.onerror = function(event) { |
| 674 | // Errors can be handled here. |
| 675 | if (aCallback) |
| 676 | aCallback(success, event); |
| 677 | } |
| 678 | } |
| 679 | }; |
| 680 | |
| 681 | var gBMStore = { |
| 682 | objStore: "bookmarks", |
| 683 | |
| 684 | getList: function(aCallback) { |
| 685 | if (!mainDB) |
| 686 | return; |
| 687 | var transaction = mainDB.transaction([this.objStore]); |
| 688 | var objStore = transaction.objectStore(this.objStore); |
| 689 | if (objStore.getAll) { // currently Mozilla-specific |
| 690 | objStore.getAll().onsuccess = function(event) { |
| 691 | aCallback(event.target.result); |
| 692 | }; |
| 693 | } |
| 694 | else { // Use cursor (standard method). |
| 695 | var BMs = {}; |
| 696 | objStore.openCursor().onsuccess = function(event) { |
| 697 | var cursor = event.target.result; |
| 698 | if (cursor) { |
| 699 | BMs[cursor.key] = cursor.value; |
| 700 | cursor.continue(); |
| 701 | } |
| 702 | else { |
| 703 | aCallback(BMs); |
| 704 | } |
| 705 | }; |
| 706 | } |
| 707 | }, |
| 708 | |
| 709 | get: function(aKey, aCallback) { |
| 710 | if (!mainDB) |
| 711 | return; |
| 712 | var transaction = mainDB.transaction([this.objStore]); |
| 713 | var request = transaction.objectStore(this.objStore).get(aKey); |
| 714 | request.onsuccess = function(event) { |
| 715 | aCallback(request.result, event); |
| 716 | }; |
| 717 | request.onerror = function(event) { |
| 718 | // Errors can be handled here. |
| 719 | aCallback(undefined, event); |
| 720 | }; |
| 721 | }, |
| 722 | |
| 723 | set: function(aKey, aValue, aCallback) { |
| 724 | if (!mainDB) |
| 725 | return; |
| 726 | var success = false; |
| 727 | var transaction = mainDB.transaction([this.objStore], "readwrite"); |
| 728 | var objStore = transaction.objectStore(this.objStore); |
| 729 | var request = objStore.put(aValue, aKey); |
| 730 | request.onsuccess = function(event) { |
| 731 | success = true; |
| 732 | if (aCallback) |
| 733 | aCallback(success, event); |
| 734 | }; |
| 735 | request.onerror = function(event) { |
| 736 | // Errors can be handled here. |
| 737 | if (aCallback) |
| 738 | aCallback(success, event); |
| 739 | }; |
| 740 | }, |
| 741 | |
| 742 | unset: function(aKey, aCallback) { |
| 743 | if (!mainDB) |
| 744 | return; |
| 745 | var success = false; |
| 746 | var transaction = mainDB.transaction([this.objStore], "readwrite"); |
| 747 | var request = transaction.objectStore(this.objStore).delete(aKey); |
| 748 | request.onsuccess = function(event) { |
| 749 | success = true; |
| 750 | if (aCallback) |
| 751 | aCallback(success, event); |
| 752 | }; |
| 753 | request.onerror = function(event) { |
| 754 | // Errors can be handled here. |
| 755 | if (aCallback) |
| 756 | aCallback(success, event); |
| 757 | } |
| 758 | }, |
| 759 | |
| 760 | clear: function(aCallback) { |
| 761 | if (!mainDB) |
| 762 | return; |
| 763 | var success = false; |
| 764 | var transaction = mainDB.transaction([this.objStore], "readwrite"); |
| 765 | var request = transaction.objectStore(this.objStore).clear(); |
| 766 | request.onsuccess = function(event) { |
| 767 | success = true; |
| 768 | if (aCallback) |
| 769 | aCallback(success, event); |
| 770 | }; |
| 771 | request.onerror = function(event) { |
| 772 | // Errors can be handled here. |
| 773 | if (aCallback) |
| 774 | aCallback(success, event); |
| 775 | } |
| 776 | } |
| 777 | }; |