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6403d662 RK |
1 | /* ***** BEGIN LICENSE BLOCK ***** |
2 | * Version: MPL 1.1/GPL 2.0/LGPL 2.1 | |
3 | * | |
4 | * The contents of this file are subject to the Mozilla Public License Version | |
5 | * 1.1 (the "License"); you may not use this file except in compliance with | |
6 | * the License. You may obtain a copy of the License at | |
7 | * http://www.mozilla.org/MPL/ | |
8 | * | |
9 | * Software distributed under the License is distributed on an "AS IS" basis, | |
10 | * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License | |
11 | * for the specific language governing rights and limitations under the | |
12 | * License. | |
13 | * | |
14 | * The Original Code is KaiRo.at Mandelbrot, XULRunner version. | |
15 | * | |
16 | * The Initial Developer of the Original Code is | |
17 | * Robert Kaiser <kairo@kairo.at>. | |
18 | * Portions created by the Initial Developer are Copyright (C) 2008 | |
19 | * the Initial Developer. All Rights Reserved. | |
20 | * | |
21 | * Contributor(s): | |
22 | * Robert Kaiser <kairo@kairo.at> | |
23 | * | |
24 | * Alternatively, the contents of this file may be used under the terms of | |
25 | * either the GNU General Public License Version 2 or later (the "GPL"), or | |
26 | * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"), | |
27 | * in which case the provisions of the GPL or the LGPL are applicable instead | |
28 | * of those above. If you wish to allow use of your version of this file only | |
29 | * under the terms of either the GPL or the LGPL, and not to allow others to | |
30 | * use your version of this file under the terms of the MPL, indicate your | |
31 | * decision by deleting the provisions above and replace them with the notice | |
32 | * and other provisions required by the GPL or the LGPL. If you do not delete | |
33 | * the provisions above, a recipient may use your version of this file under | |
34 | * the terms of any one of the MPL, the GPL or the LGPL. | |
35 | * | |
36 | * ***** END LICENSE BLOCK ***** */ | |
37 | ||
eceff1c9 RK |
38 | var gColorPalette = []; |
39 | ||
6403d662 RK |
40 | function initSettings() { |
41 | } | |
eceff1c9 RK |
42 | |
43 | function drawPreview() { | |
44 | let canvas = document.getElementById("mbrotPreview"); | |
45 | let context = canvas.getContext("2d"); | |
46 | ||
47 | let Cr_min = parseFloat(document.getElementById("Cr_min").value); | |
48 | let Cr_max = parseFloat(document.getElementById("Cr_max").value); | |
49 | if ((Cr_min < -2) || (Cr_min > 2) || | |
50 | (Cr_max < -2) || (Cr_max > 2) || (Cr_min >= Cr_max)) { | |
51 | Cr_min = -2.0; Cr_max = 1.0; | |
52 | } | |
53 | ||
54 | let Ci_min = parseFloat(document.getElementById("Ci_min").value); | |
55 | let Ci_max = parseFloat(document.getElementById("Ci_max").value); | |
56 | if ((Ci_min < -2) || (Ci_min > 2) || | |
57 | (Ci_max < -2) || (Ci_max > 2) || (Ci_min >= Ci_max)) { | |
58 | Ci_min = -2.0; Ci_max = 1.0; | |
59 | } | |
60 | ||
61 | let iterMax = gPref.getIntPref("mandelbrot.iteration_max"); | |
62 | let algorithm = gPref.getCharPref("mandelbrot.use_algorithm"); | |
63 | ||
64 | context.fillStyle = "rgba(255, 255, 255, 127)"; | |
65 | context.fillRect(0, 0, canvas.width, canvas.height); | |
66 | ||
67 | try { | |
68 | var currentPalette = gPref.getCharPref("mandelbrot.color_palette"); | |
69 | } | |
70 | catch(e) { | |
71 | var currentPalette = ''; | |
72 | } | |
73 | if (!currentPalette.length) { | |
74 | currentPalette = 'kairo'; | |
75 | } | |
76 | gColorPalette = getColorPalette(currentPalette); | |
77 | ||
78 | drawLine(0, [Cr_min, Cr_max, Ci_min, Ci_max], | |
79 | canvas, context, iterMax, algorithm); | |
80 | } |