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 // // context.fillStyle = "rgba(0, 0, 200, 0.5)"; // context.fillRect (30, 30, 55, 50); 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; let Ci_scale = Ci_max - Ci_min; 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, 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; this.square = function() { return new complex(this.r * this.r - this.i * this.i, 2 * this.r * this.i); } this.dist = function() { return Math.sqrt(this.r * this.r + this.i * this.i); } this.add = function(aComplex) { return new complex(this.r + aComplex.r, this.i + aComplex.i); } } 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; } 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; for (var iter = 0; iter < aIterMax; iter++) { Zi = 2 * Zr * Zi + Ci; Zr = Zr2 - Zi2 + Cr; Zr2 = Zr * Zr; Zi2 = Zi * Zi; if (Zr2 + Zi2 > 256) { break; } } return iter; } function getColor(aIterValue, aIterMax) { let standardizedValue = Math.round(aIterValue * 1024 / 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(255,255,255)"; } function getColorPalette(palName) { var palette = []; switch (palName) { case 'bw': for (let i = 0; i < 1024; i++) { palette[i] = 'rgb(255,255,255)'; } palette[1024] = 'rgb(0,0,0)'; 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 + ')'; } // inner areas for (let i = 0; i < 51; i++) { let cc = Math.floor(i * 170 / 50); palette[32 + i] = 'rgb(' + cc + ',0,' + (170 + cc) + ')'; } // corona for (let i = 0; i < 101; i++) { let cc = Math.floor(i * 200 / 100); palette[83 + i] = 'rgb(255,' + cc + ',0)'; } // 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 + ')'; } 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 + ')'; } for (let i = 0; i < 338; i++) { let cc = 127 + Math.floor(i * 128 / 337); palette[686 + i] = 'rgb(' + cc + ',' + cc + ',255)'; } palette[1024] = 'rgb(0,0,0)'; 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[1024] = 'rgb(0,0,0)'; break; } /* Select Case palnr Case 1 'Standard-Palette (QB-Colors) For i = 0 To 1024 xx = CInt(i * 500 / 1024 + 2) If xx <= 15 Then clr = xx If xx > 15 Then clr = CInt(Sqr((xx - 15 + 1) * 15 ^ 2 / 485)) If xx >= 500 Then clr = 0 palette(i) = QBColor(clr) Next Case 3 'Regenbogen-Palette 1 (qu.) For i = 0 To 33 clr = CInt(i * 255 / 33) palette(i) = RGB(clr, 0, 0) Next For i = 0 To 136 clr = CInt(i * 255 / 136) palette(34 + i) = RGB(255, clr, 0) Next For i = 0 To 306 clr = CInt(i * 255 / 306) palette(171 + i) = RGB(255 - clr, 255, clr) Next For i = 0 To 545 clr = CInt(i * 255 / 545) palette(478 + i) = RGB(clr, 255 - clr, 255) Next Case 4 'Regenbogen-Palette 2 (linear) For i = 0 To 204 clr = CInt(i * 255 / 204) palette(i) = RGB(255, clr, 0) palette(204 + i) = RGB(255 - clr, 255, 0) palette(409 + i) = RGB(0, 255, clr) palette(614 + i) = RGB(0, 255 - clr, 255) palette(819 + i) = RGB(clr, 0, 255) Next Case 5 'Regenbogen-Palette 2 (qu.) For i = 0 To 18 clr = CInt(i * 255 / 18) palette(i) = RGB(255, clr, 0) Next For i = 0 To 73 clr = CInt(i * 255 / 73) palette(20 + i) = RGB(255 - clr, 255, 0) Next For i = 0 To 167 clr = CInt(i * 255 / 167) palette(93 + i) = RGB(0, 255, clr) Next For i = 0 To 297 clr = CInt(i * 255 / 297) palette(261 + i) = RGB(0, 255 - clr, 255) Next For i = 0 To 464 clr = CInt(i * 255 / 464) palette(559 + i) = RGB(clr, 0, 255) Next */ return palette; } 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() { // 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 var file = Components.classes["@mozilla.org/file/local;1"] .createInstance(Components.interfaces.nsILocalFile); file.initWithPath(destFile); // 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); // prepare to save the canvas data var persist = Components.classes["@mozilla.org/embedding/browser/nsWebBrowserPersist;1"] .createInstance(Components.interfaces.nsIWebBrowserPersist); 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); } // function below is from http://developer.mozilla.org/en/docs/How_to_Quit_a_XUL_Application function quitApp(aForceQuit) { var appStartup = Components.classes['@mozilla.org/toolkit/app-startup;1'] .getService(Components.interfaces.nsIAppStartup); // eAttemptQuit will try to close each XUL window, but the XUL window can cancel the quit // process if there is unsaved data. eForceQuit will quit no matter what. var quitSeverity = aForceQuit ? Components.interfaces.nsIAppStartup.eForceQuit : Components.interfaces.nsIAppStartup.eAttemptQuit; appStartup.quit(quitSeverity); }