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d0244cd3 RK |
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/. */ | |
6a7aa57d | 4 | |
7cde05f7 RK |
5 | // Get the best-available indexedDB object. |
6 | var iDB = window.indexedDB || window.webkitIndexedDB || window.mozIndexedDB || window.msIndexedDB; | |
7 | var mainDB; | |
8 | ||
51442fd4 | 9 | var gMainCanvas, gMainContext; |
6a7aa57d RK |
10 | var gColorPalette = []; |
11 | var gStartTime = 0; | |
becdac35 RK |
12 | var gCurrentImageData; |
13 | var gLastImageData; | |
14 | ||
15 | function Startup() { | |
7cde05f7 RK |
16 | initDB(); |
17 | ||
51442fd4 RK |
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); | |
becdac35 RK |
33 | } |
34 | ||
7cde05f7 RK |
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 | ||
becdac35 RK |
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; | |
7cde05f7 | 75 | gPrefs.set(prefname, value); |
becdac35 RK |
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 | } | |
7cde05f7 RK |
91 | gPrefs.set("Cr_min", Cr_min); |
92 | gPrefs.set("Cr_max", Cr_max); | |
becdac35 RK |
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 | } | |
7cde05f7 RK |
108 | gPrefs.set("Ci_min", Ci_min); |
109 | gPrefs.set("Ci_max", Ci_max); | |
becdac35 RK |
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) { | |
7cde05f7 | 150 | gPrefs.set(prefname, value); |
becdac35 RK |
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": | |
7cde05f7 | 163 | gPrefs.set(aName, value); |
becdac35 RK |
164 | document.getElementById(aName.replace(".", "_")).value = value; |
165 | break; | |
166 | case "last_image.Cr_*": | |
7cde05f7 RK |
167 | gPrefs.set("Cr_min", Cr_min); |
168 | gPrefs.set("Cr_max", Cr_max); | |
becdac35 RK |
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_*": | |
7cde05f7 RK |
173 | gPrefs.set("Ci_min", Ci_min); |
174 | gPrefs.set("Ci_max", Ci_max); | |
becdac35 RK |
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": | |
7cde05f7 | 188 | gPrefs.set(aName, value); |
becdac35 RK |
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 | } | |
6a7aa57d RK |
227 | |
228 | function drawImage() { | |
51442fd4 RK |
229 | var canvas = gMainCanvas; |
230 | var context = gMainContext; | |
6a7aa57d RK |
231 | |
232 | document.getElementById("calcTime").textContent = "--"; | |
233 | ||
becdac35 RK |
234 | if (gCurrentImageData) { |
235 | gLastImageData = gCurrentImageData; | |
95d05599 | 236 | document.getElementById("backButton").disabled = false; |
becdac35 RK |
237 | } |
238 | ||
6a7aa57d RK |
239 | gColorPalette = getColorPalette(document.getElementById("palette").value); |
240 | ||
becdac35 RK |
241 | var Cr_vals = getAdjustVal("last_image.Cr_*"); |
242 | var Cr_min = Cr_vals.Cr_min; | |
243 | var Cr_max = Cr_vals.Cr_max; | |
6a7aa57d | 244 | |
becdac35 RK |
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"); | |
6a7aa57d RK |
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 | ||
becdac35 RK |
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 | ||
6a7aa57d RK |
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; | |
becdac35 RK |
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; | |
6a7aa57d RK |
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 | ||
becdac35 RK |
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 | ||
95d05599 RK |
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 | } | |
becdac35 RK |
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 | } | |
95d05599 | 579 | break; |
becdac35 RK |
580 | } |
581 | } | |
582 | }; | |
583 | ||
95d05599 RK |
584 | function drawIfEmpty() { |
585 | if (!gCurrentImageData) { | |
586 | drawImage(); | |
587 | } | |
588 | } | |
589 | ||
6a7aa57d RK |
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 | } | |
becdac35 RK |
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; | |
95d05599 | 606 | document.getElementById("backButton").disabled = true; |
becdac35 RK |
607 | } |
608 | } | |
609 | ||
610 | function setIter(aIter) { | |
7cde05f7 | 611 | gPrefs.set("iteration_max", aIter); |
becdac35 RK |
612 | document.getElementById("iterMax").value = aIter; |
613 | } | |
614 | ||
615 | function setPalette(aPaletteID) { | |
7cde05f7 | 616 | gPrefs.set("color_palette", aPaletteID); |
becdac35 RK |
617 | document.getElementById("palette").value = aPaletteID; |
618 | gColorPalette = getColorPalette(aPaletteID); | |
619 | } | |
620 | ||
621 | function setAlgorithm(algoID) { | |
7cde05f7 | 622 | gPrefs.set("use_algorithm", algoID); |
becdac35 RK |
623 | //document.getElementById("algorithm").value = algoID; |
624 | } | |
7cde05f7 RK |
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 | }; |