function drawImage() {
let canvas = document.getElementById("mbrotImage");
- if (canvas.getContext) {
- let context = canvas.getContext("2d");
+ let context = canvas.getContext("2d");
- document.getElementById("statusLabel").value =
- document.getElementById("mbrotBundle").getString("statusDrawing");
+ 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
- //
- // context.fillStyle = "rgba(0, 0, 200, 0.5)";
- // context.fillRect (30, 30, 55, 50);
+ let Cr_min = -2.0;
+ let Cr_max = 1.0;
+ try {
+ Cr_min = parseFloat(gPref.getCharPref("mandelbrot.last_image.Cr_min"));
+ Cr_max = parseFloat(gPref.getCharPref("mandelbrot.last_image.Cr_max"));
+ }
+ catch (e) { }
+ if ((Cr_min < -2) || (Cr_min > 2) ||
+ (Cr_max < -2) || (Cr_max > 2) || (Cr_min >= Cr_max)) {
+ Cr_min = -2.0; Cr_max = 1.0;
+ }
+ gPref.setCharPref("mandelbrot.last_image.Cr_min", Cr_min);
+ gPref.setCharPref("mandelbrot.last_image.Cr_max", Cr_max);
- let Cr_min = -2.0;
- let Cr_max = 1.0;
- let Cr_scale = Cr_max - Cr_min;
+ let Ci_min = -1.5;
+ let Ci_max = 1.5;
+ try {
+ Ci_min = parseFloat(gPref.getCharPref("mandelbrot.last_image.Ci_min"));
+ Ci_max = parseFloat(gPref.getCharPref("mandelbrot.last_image.Ci_max"));
+ }
+ catch (e) { }
+ if ((Ci_min < -2) || (Ci_min > 2) ||
+ (Ci_max < -2) || (Ci_max > 2) || (Ci_min >= Ci_max)) {
+ Ci_min = -2.0; Ci_max = 1.0;
+ }
+ gPref.setCharPref("mandelbrot.last_image.Ci_min", Ci_min);
+ gPref.setCharPref("mandelbrot.last_image.Ci_max", Ci_max);
- let Ci_min = -1.5;
- let Ci_max = 1.5;
- let Ci_scale = Ci_max - Ci_min;
+ let iterMax = gPref.getIntPref("mandelbrot.iteration_max");
+ let algorithm = gPref.getCharPref("mandelbrot.use_algorithm");
+
+ let iWidth = 0;
+ try {
+ iWidth = gPref.getIntPref("mandelbrot.image.width");
+ }
+ catch (e) { }
+ if ((iWidth < 10) || (iWidth > 5000)) {
+ iWidth = 300;
+ gPref.setIntPref("mandelbrot.image.width", iWidth);
+ }
+ let iHeight = 0;
+ try {
+ iHeight = gPref.getIntPref("mandelbrot.image.height");
+ }
+ catch (e) { }
+ if ((iHeight < 10) || (iHeight > 5000)) {
+ iHeight = 300;
+ gPref.setIntPref("mandelbrot.image.height", iHeight);
+ }
+
+ canvas.width = iWidth;
+ canvas.height = iHeight;
+
+ context.fillStyle = "rgba(255, 255, 255, 127)";
+ context.fillRect(0, 0, canvas.width, canvas.height);
- let iterMax = gPref.getIntPref("mandelbrot.iteration_max");
- let algorithm = gPref.getCharPref("mandelbrot.use_algorithm");
+ gStartTime = new Date();
- gStartTime = new Date();
+ drawLine(0, [Cr_min, Cr_max, Ci_min, Ci_max],
+ canvas, context, iterMax, algorithm);
+}
+
+function drawLine(line, dimensions, canvas, context, iterMax, algorithm) {
+ let Cr_min = dimensions[0];
+ let Cr_max = dimensions[1];
+ let Cr_scale = Cr_max - Cr_min;
+
+ let Ci_min = dimensions[2];
+ let Ci_max = dimensions[3];
+ let Ci_scale = Ci_max - Ci_min;
- for (let img_x = 0; img_x < canvas.width; img_x++) {
- for (let img_y = 0; img_y < canvas.height; img_y++) {
+ let pixels = [];
+ for (var img_y = line; img_y < canvas.height && img_y < line+8; img_y++)
+ for (let img_x = 0; img_x < canvas.width; img_x++) {
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, algorithm);
+ pixels.push.apply(pixels, drawPoint(context, img_x, img_y, C, iterMax, algorithm));
}
- }
- window.setTimeout(EndCalc, 0);
- }
+ context.putImageData({width: canvas.width, height: pixels.length/4/canvas.width, data: pixels}, 0, line);
+
+ if (img_y < canvas.height)
+ setTimeout(drawLine, 0, img_y, dimensions, canvas, context, iterMax, algorithm);
+ else if (gStartTime)
+ EndCalc();
}
function EndCalc() {
function complex(aReal, aImag) {
this.r = aReal;
this.i = aImag;
- this.square = function() {
+}
+complex.prototype = {
+ square: function() {
return new complex(this.r * this.r - this.i * this.i,
2 * this.r * this.i);
- }
- this.dist = function() {
+ },
+ dist: function() {
return Math.sqrt(this.r * this.r + this.i * this.i);
- }
- this.add = function(aComplex) {
+ },
+ add: function(aComplex) {
return new complex(this.r + aComplex.r, this.i + aComplex.i);
}
}
// fallback to simple b/w if for some reason we don't have a palette
if (aIterValue == aIterMax)
- return "rgb(0,0,0)";
+ return [0, 0, 0, 255];
else
- return "rgb(255,255,255)";
+ return [255, 255, 255, 255];
}
function getColorPalette(palName) {
switch (palName) {
case 'bw':
for (let i = 0; i < 1024; i++) {
- palette[i] = 'rgb(255,255,255)';
+ palette[i] = [255, 255, 255, 255];
}
- palette[1024] = 'rgb(0,0,0)';
+ palette[1024] = [0, 0, 0, 255];
break;
case 'kairo':
// outer areas
for (let i = 0; i < 32; i++) {
let cc1 = Math.floor(i * 127 / 31);
let cc2 = 170 - Math.floor(i * 43 / 31);
- palette[i] = 'rgb(' + cc1 + ',' + cc2 + ',' + cc1 + ')';
+ palette[i] = [cc1, cc2, cc1, 255];
}
// inner areas
for (let i = 0; i < 51; i++) {
let cc = Math.floor(i * 170 / 50);
- palette[32 + i] = 'rgb(' + cc + ',0,' + (170 + cc) + ')';
+ palette[32 + i] = [cc, 0, (170-cc), 255];
}
// corona
for (let i = 0; i < 101; i++) {
let cc = Math.floor(i * 200 / 100);
- palette[83 + i] = 'rgb(255,' + cc + ',0)';
+ palette[83 + i] = [255, cc, 0, 255];
}
// inner corona
for (let i = 0; i < 201; i++) {
let cc1 = 255 - Math.floor(i * 85 / 200);
let cc2 = 200 - Math.floor(i * 30 / 200);
let cc3 = Math.floor(i * 170 / 200);
- palette[184 + i] = 'rgb(' + cc1 + ',' + cc2 + ',' + cc3 + ')';
+ palette[184 + i] = [cc1, cc2, cc3, 255];
}
for (let i = 0; i < 301; i++) {
let cc1 = 170 - Math.floor(i * 43 / 300);
let cc2 = 170 + Math.floor(i * 85 / 300);
- palette[385 + i] = 'rgb(' + cc1 + ',' + cc1 + ',' + cc2 + ')';
+ palette[385 + i] = [cc1, cc1, cc2, 255];
}
for (let i = 0; i < 338; i++) {
let cc = 127 + Math.floor(i * 128 / 337);
- palette[686 + i] = 'rgb(' + cc + ',' + cc + ',255)';
+ palette[686 + i] = [cc, cc, 255, 255];
}
- palette[1024] = 'rgb(0,0,0)';
+ palette[1024] = [0, 0, 0, 255];
break;
case 'rainbow-linear1':
for (let i = 0; i < 256; i++) {
- palette[i] = 'rgb(' + i + ',0,0)';
- palette[256 + i] = 'rgb(255,' + i + ',0)';
- palette[512 + i] = 'rgb(' + (255 - i) + ',255,' + i + ')';
- palette[768 + i] = 'rgb(' + i + ',' + (255 - i) + ',255)';
+ palette[i] = [i, 0, 0, 255];
+ palette[256 + i] = [255, i, 0, 255];
+ palette[512 + i] = [255 - i, 255, i, 255];
+ palette[768 + i] = [i, 255-i, 255, 255];
}
- palette[1024] = 'rgb(0,0,0)';
+ palette[1024] = [0, 0, 0, 255];
break;
}
/*
itVal = mandelbrotValueNumeric(C, iterMax);
break;
}
- context.fillStyle = getColor(itVal, iterMax);
- context.fillRect (img_x, img_y, 1, 1); // x, y, width, height
+ return getColor(itVal, iterMax);
}
/***** pure UI functions *****/
function saveImage() {
- // XXX: should call filepicker!
- saveCanvas(document.getElementById("mbrotImage"), "/home/robert/temp/canvas-save.png")
+ const bundle = document.getElementById("mbrotBundle");
+ const nsIFilePicker = Components.interfaces.nsIFilePicker;
+ var fp = null;
+ try {
+ fp = Components.classes["@mozilla.org/filepicker;1"]
+ .createInstance(nsIFilePicker);
+ } catch (e) {}
+ if (!fp) return;
+ var promptString = bundle.getString("savePrompt");
+ fp.init(window, promptString, nsIFilePicker.modeSave);
+ fp.appendFilter(bundle.getString("pngFilterName"), "*.png");
+ fp.defaultString = "mandelbrot.png";
+
+ var fpResult = fp.show();
+ if (fpResult != nsIFilePicker.returnCancel) {
+ saveCanvas(document.getElementById("mbrotImage"), fp.file);
+ }
}
function updateIterMenu() {
gColorPalette = getColorPalette(aPaletteID);
}
+function imgSettings() {
+ window.openDialog("chrome://mandelbrot/content/image-settings.xul");
+}
+
function updateDebugMenu() {
var jitMenuItem = document.getElementById("jitEnabled");
jitMenuItem.setAttribute("checked", gPref.getBoolPref("javascript.options.jit.chrome"));
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
- var file = Components.classes["@mozilla.org/file/local;1"]
- .createInstance(Components.interfaces.nsILocalFile);
- file.initWithPath(destFile);
-
+// function below is based on http://developer.mozilla.org/en/docs/Code_snippets:Canvas
+// custom modifications:
+// - use "a"-prefix on function arguments
+// - take an nsILocalFile as aDestFile argument
+// - always do silent download
+function saveCanvas(aCanvas, aDestFile) {
// create a data url from the canvas and then create URIs of the source and targets
var io = Components.classes["@mozilla.org/network/io-service;1"]
.getService(Components.interfaces.nsIIOService);
- var source = io.newURI(canvas.toDataURL("image/png", ""), "UTF8", null);
- var target = io.newFileURI(file);
+ var source = io.newURI(aCanvas.toDataURL("image/png", ""), "UTF8", null);
// prepare to save the canvas data
var persist = Components.classes["@mozilla.org/embedding/browser/nsWebBrowserPersist;1"]
persist.persistFlags = Components.interfaces.nsIWebBrowserPersist.PERSIST_FLAGS_REPLACE_EXISTING_FILES;
persist.persistFlags |= Components.interfaces.nsIWebBrowserPersist.PERSIST_FLAGS_AUTODETECT_APPLY_CONVERSION;
- // displays a download dialog (remove these 3 lines for silent download)
- var xfer = Components.classes["@mozilla.org/transfer;1"]
- .createInstance(Components.interfaces.nsITransfer);
- xfer.init(source, target, "", null, null, null, persist);
- persist.progressListener = xfer;
-
// save the canvas data to the file
- persist.saveURI(source, null, null, null, null, file);
+ persist.saveURI(source, null, null, null, null, aDestFile);
}
// function below is from http://developer.mozilla.org/en/docs/How_to_Quit_a_XUL_Application
projects / mandelbrot.git / blobdiff