-var gColorPalette = getColorPalette('kairo');
+var gColorPalette = [];
+var gPref = Components.classes["@mozilla.org/preferences-service;1"]
+ .getService(Components.interfaces.nsIPrefService)
+ .getBranch(null);
+var gStartTime = 0;
+
+function Startup() {
+ updateIterMenu();
+ updatePaletteMenu();
+ document.getElementById("statusLabel").value =
+ document.getElementById("mbrotBundle").getString("statusEmpty");
+}
function drawImage() {
let canvas = document.getElementById("mbrotImage");
if (canvas.getContext) {
let context = canvas.getContext("2d");
+ document.getElementById("statusLabel").value =
+ document.getElementById("mbrotBundle").getString("statusDrawing");
+
// example:
// context.fillStyle = "rgb(200,0,0)";
// context.fillRect (10, 10, 55, 50); // x, y, width, height
let Ci_max = 1.5;
let Ci_scale = Ci_max - Ci_min;
- let iterMax = 500;
+ let iterMax = gPref.getIntPref("mandelbrot.iteration_max");
+ let algorithm = gPref.getCharPref("mandelbrot.use_algorithm");
+
+ gStartTime = new Date();
for (let img_x = 0; img_x < canvas.width; img_x++) {
for (let img_y = 0; img_y < canvas.height; img_y++) {
let C = new complex(Cr_min + (img_x / canvas.width) * Cr_scale,
Ci_min + (img_y / canvas.height) * Ci_scale);
- window.setTimeout(drawPoint, 0, context, img_x, img_y, C, iterMax);
+ window.setTimeout(drawPoint, 0, context, img_x, img_y, C, iterMax, algorithm);
}
}
+ window.setTimeout(EndCalc, 0);
}
}
+function EndCalc() {
+ let endTime = new Date();
+ let timeUsed = (endTime.getTime() - gStartTime.getTime()) / 1000;
+ document.getElementById("statusLabel").value =
+ document.getElementById("mbrotBundle").getFormattedString("statusTime", [timeUsed.toFixed(3)]);
+}
+
function complex(aReal, aImag) {
this.r = aReal;
this.i = aImag;
}
}
-function mandelbrotValue (aC, aIterMax) {
- /* XXX: this would be nice code but it looks like JS objects are too heavy for this.
+function mandelbrotValueOO (aC, aIterMax) {
+ // this would be nice code in general but it looks like JS objects are too heavy for normal use.
let Z = new complex(0.0, 0.0);
for (var iter = 0; iter < aIterMax; iter++) {
Z = Z.square().add(aC);
if (Z.r * Z.r + Z.i * Z.i > 256) { break; }
}
- */
+ return iter;
+}
- // highly optimized code for fast calculation
+function mandelbrotValueNumeric (aC, aIterMax) {
+ // optimized numeric code for fast calculation
let Cr = aC.r, Ci = aC.i;
let Zr = 0.0, Zi = 0.0;
let Zr2 = Zr * Zr, Zi2 = Zi * Zi;
function getColor(aIterValue, aIterMax) {
let standardizedValue = Math.round(aIterValue * 1024 / aIterMax);
- return gColorPalette[standardizedValue];
- if (aIterValue == aIterMax) {
+ if (gColorPalette && gColorPalette.length)
+ return gColorPalette[standardizedValue];
+
+ // fallback to simple b/w if for some reason we don't have a palette
+ if (aIterValue == aIterMax)
return "rgb(0,0,0)";
- }
- else {
- //return "rgb(" + img_x + "," + img_y + ",0)";
+ else
return "rgb(255,255,255)";
- }
}
function getColorPalette(palName) {
return palette;
}
-function drawPoint(context, img_x, img_y, C, iterMax) {
- let itVal = mandelbrotValue(C, iterMax);
+function drawPoint(context, img_x, img_y, C, iterMax, algorithm) {
+ var itVal;
+ switch (algorithm) {
+ case 'oo':
+ itVal = mandelbrotValueOO(C, iterMax);
+ break;
+ case 'numeric':
+ default:
+ itVal = mandelbrotValueNumeric(C, iterMax);
+ break;
+ }
context.fillStyle = getColor(itVal, iterMax);
context.fillRect (img_x, img_y, 1, 1); // x, y, width, height
}
+/***** pure UI functions *****/
+
function saveImage() {
- // should call filepicker!
+ // XXX: should call filepicker!
saveCanvas(document.getElementById("mbrotImage"), "/home/robert/temp/canvas-save.png")
}
+function updateIterMenu() {
+ try {
+ var currentIter = gPref.getIntPref("mandelbrot.iteration_max");
+ }
+ catch(e) {
+ var currentIter = 0;
+ }
+ if (currentIter < 10) {
+ currentIter = 500;
+ setIter(currentIter);
+ }
+
+ var popup = document.getElementById("menu_iterPopup");
+ var item = popup.firstChild;
+ while (item) {
+ if (item.getAttribute("name") == "iter") {
+ if (item.getAttribute("value") == currentIter)
+ item.setAttribute("checked","true");
+ else
+ item.removeAttribute("checked");
+ }
+ item = item.nextSibling;
+ }
+}
+
+function setIter(aIter) {
+ gPref.setIntPref("mandelbrot.iteration_max", aIter);
+}
+
+function updatePaletteMenu() {
+ try {
+ var currentPalette = gPref.getCharPref("mandelbrot.color_palette");
+ }
+ catch(e) {
+ var currentPalette = '';
+ }
+ if (!currentPalette.length) {
+ currentPalette = 'kairo';
+ setPalette(currentPalette);
+ }
+ if (!gColorPalette || !gColorPalette.length)
+ gColorPalette = getColorPalette(currentPalette);
+
+ var popup = document.getElementById("menu_palettePopup");
+ var item = popup.firstChild;
+ while (item) {
+ if (item.getAttribute("name") == "palette") {
+ if (item.getAttribute("value") == currentPalette)
+ item.setAttribute("checked", "true");
+ else
+ item.removeAttribute("checked");
+ }
+ item = item.nextSibling;
+ }
+}
+
+function setPalette(aPaletteID) {
+ gPref.setCharPref("mandelbrot.color_palette", aPaletteID);
+ gColorPalette = getColorPalette(aPaletteID);
+}
+
+function updateDebugMenu() {
+ var jitMenuItem = document.getElementById("jitEnabled");
+ jitMenuItem.setAttribute("checked", gPref.getBoolPref("javascript.options.jit.chrome"));
+}
+
+function toggleJITState(jitMenuItem) {
+ var jitEnabled = !gPref.getBoolPref("javascript.options.jit.chrome");
+ gPref.setBoolPref("javascript.options.jit.chrome", jitEnabled)
+ jitMenuItem.setAttribute("checked", jitEnabled? "true" : "false");
+}
+
+function updateAlgoMenu() {
+ try {
+ var currentAlgo = gPref.getCharPref("mandelbrot.use_algorithm");
+ }
+ catch(e) {
+ var currentAlgo = '';
+ }
+ if (!currentAlgo.length) {
+ currentAlgo = 'numeric';
+ setAlgorithm(currentAlgo);
+ }
+
+ var popup = document.getElementById("menu_algoPopup");
+ var item = popup.firstChild;
+ while (item) {
+ if (item.getAttribute("name") == "algorithm") {
+ if (item.getAttribute("value") == currentAlgo)
+ item.setAttribute("checked", "true");
+ else
+ item.removeAttribute("checked");
+ }
+ item = item.nextSibling;
+ }
+}
+
+function setAlgorithm(algoID) {
+ gPref.setCharPref("mandelbrot.use_algorithm", algoID);
+}
+
+
+/***** helper functions from external sources *****/
+
// function below is from from http://developer.mozilla.org/en/docs/Code_snippets:Canvas
function saveCanvas(canvas, destFile) {
// convert string filepath to an nsIFile
projects / mandelbrot.git / blobdiff