mirror of
https://github.com/novnc/noVNC.git
synced 2026-05-26 23:19:41 +00:00
67b4e9879a
Generally, most servers send hextile updates as single updates containing many rects. Some servers send hextile updates as many small framebuffer updates with a few rects each (such as QEMU). This latter cases revealed that shifting off the beginning of the receive queue (which happens after each hextile FBU) performs poorly. This change switches to using an indexed receive queue (instead of actually shifting off the array). When the receive queue has grown to a certain size, then it is compacted all at once. The code is not as clean, but this change results in more than 2X speedup under Chrome for the pessimal case and 10-20% in firefox.
743 lines
22 KiB
JavaScript
743 lines
22 KiB
JavaScript
/*
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* noVNC: HTML5 VNC client
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* Copyright (C) 2010 Joel Martin
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* Licensed under LGPL-3 (see LICENSE.LGPL-3)
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*
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* See README.md for usage and integration instructions.
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*/
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"use strict";
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/*jslint browser: true, white: false, bitwise: false */
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/*global window, Util, Base64 */
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function Canvas(conf) {
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conf = conf || {}; // Configuration
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var that = {}, // Public API interface
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// Pre-declare functions used before definitions (jslint)jslint
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setFillColor, fillRect,
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// Private Canvas namespace variables
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c_forceCanvas = false,
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c_width = 0,
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c_height = 0,
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c_prevStyle = "",
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c_keyPress = null,
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c_mouseButton = null,
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c_mouseMove = null;
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// Capability settings, default can be overridden
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Util.conf_default(conf, that, 'prefer_js', null);
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Util.conf_default(conf, that, 'cursor_uri', null);
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// Configuration settings
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Util.conf_default(conf, that, 'target', null);
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// Area that traps keyboard input
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Util.conf_default(conf, that, 'focusContainer', document);
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Util.conf_default(conf, that, 'true_color', true);
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Util.conf_default(conf, that, 'focused', true);
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Util.conf_default(conf, that, 'colourMap', []);
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Util.conf_default(conf, that, 'scale', 1);
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// Override some specific getters/setters
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that.set_prefer_js = function(val) {
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if (val && c_forceCanvas) {
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Util.Warn("Preferring Javascript to Canvas ops is not supported");
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return false;
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}
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conf.prefer_js = val;
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return true;
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};
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that.get_colourMap = function(idx) {
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if (typeof idx === 'undefined') {
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return conf.colourMap;
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} else {
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return conf.colourMap[idx];
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}
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};
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that.set_colourMap = function(val, idx) {
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if (typeof idx === 'undefined') {
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conf.colourMap = val;
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} else {
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conf.colourMap[idx] = val;
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}
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};
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// Add some other getters/setters
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that.get_width = function() {
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return c_width;
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};
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that.get_height = function() {
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return c_height;
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};
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//
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// Private functions
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//
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// Create the public API interface
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function constructor() {
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Util.Debug(">> Canvas.init");
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var c, ctx, imgTest, tval, i, curDat, curSave,
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has_imageData = false;
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if (! conf.target) { throw("target must be set"); }
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if (typeof conf.target === 'string') {
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conf.target = window.$(conf.target);
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}
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c = conf.target;
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if (! c.getContext) { throw("no getContext method"); }
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if (! conf.ctx) { conf.ctx = c.getContext('2d'); }
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ctx = conf.ctx;
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that.clear();
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/*
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* Determine browser Canvas feature support
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* and select fastest rendering methods
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*/
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tval = 0;
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try {
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imgTest = ctx.getImageData(0, 0, 1,1);
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imgTest.data[0] = 123;
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imgTest.data[3] = 255;
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ctx.putImageData(imgTest, 0, 0);
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tval = ctx.getImageData(0, 0, 1, 1).data[0];
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if (tval === 123) {
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has_imageData = true;
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}
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} catch (exc1) {}
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if (has_imageData) {
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Util.Info("Canvas supports imageData");
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c_forceCanvas = false;
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if (ctx.createImageData) {
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// If it's there, it's faster
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Util.Info("Using Canvas createImageData");
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that.imageData = that.imageDataCreate;
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} else if (ctx.getImageData) {
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Util.Info("Using Canvas getImageData");
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that.imageData = that.imageDataGet;
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}
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Util.Info("Prefering javascript operations");
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if (conf.prefer_js === null) {
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conf.prefer_js = true;
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}
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that.rgbxImage = that.rgbxImageData;
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that.cmapImage = that.cmapImageData;
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} else {
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Util.Warn("Canvas lacks imageData, using fillRect (slow)");
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c_forceCanvas = true;
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conf.prefer_js = false;
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that.rgbxImage = that.rgbxImageFill;
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that.cmapImage = that.cmapImageFill;
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}
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/*
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* Determine browser support for setting the cursor via data URI
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* scheme
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*/
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curDat = [];
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for (i=0; i < 8 * 8 * 4; i += 1) {
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curDat.push(255);
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}
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try {
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curSave = c.style.cursor;
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that.changeCursor(curDat, curDat, 2, 2, 8, 8);
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if (c.style.cursor) {
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if (conf.cursor_uri === null) {
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conf.cursor_uri = true;
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}
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Util.Info("Data URI scheme cursor supported");
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} else {
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if (conf.cursor_uri === null) {
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conf.cursor_uri = false;
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}
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Util.Warn("Data URI scheme cursor not supported");
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}
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c.style.cursor = curSave;
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} catch (exc2) {
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Util.Error("Data URI scheme cursor test exception: " + exc2);
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conf.cursor_uri = false;
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}
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conf.focused = true;
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Util.Debug("<< Canvas.init");
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return that ;
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}
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/* Translate DOM key event to keysym value */
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function getKeysym(e) {
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var evt, keysym;
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evt = (e ? e : window.event);
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/* Remap modifier and special keys */
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switch ( evt.keyCode ) {
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case 8 : keysym = 0xFF08; break; // BACKSPACE
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case 9 : keysym = 0xFF09; break; // TAB
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case 13 : keysym = 0xFF0D; break; // ENTER
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case 27 : keysym = 0xFF1B; break; // ESCAPE
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case 45 : keysym = 0xFF63; break; // INSERT
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case 46 : keysym = 0xFFFF; break; // DELETE
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case 36 : keysym = 0xFF50; break; // HOME
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case 35 : keysym = 0xFF57; break; // END
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case 33 : keysym = 0xFF55; break; // PAGE_UP
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case 34 : keysym = 0xFF56; break; // PAGE_DOWN
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case 37 : keysym = 0xFF51; break; // LEFT
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case 38 : keysym = 0xFF52; break; // UP
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case 39 : keysym = 0xFF53; break; // RIGHT
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case 40 : keysym = 0xFF54; break; // DOWN
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case 112 : keysym = 0xFFBE; break; // F1
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case 113 : keysym = 0xFFBF; break; // F2
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case 114 : keysym = 0xFFC0; break; // F3
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case 115 : keysym = 0xFFC1; break; // F4
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case 116 : keysym = 0xFFC2; break; // F5
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case 117 : keysym = 0xFFC3; break; // F6
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case 118 : keysym = 0xFFC4; break; // F7
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case 119 : keysym = 0xFFC5; break; // F8
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case 120 : keysym = 0xFFC6; break; // F9
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case 121 : keysym = 0xFFC7; break; // F10
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case 122 : keysym = 0xFFC8; break; // F11
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case 123 : keysym = 0xFFC9; break; // F12
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case 16 : keysym = 0xFFE1; break; // SHIFT
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case 17 : keysym = 0xFFE3; break; // CONTROL
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//case 18 : keysym = 0xFFE7; break; // Left Meta (Mac Option)
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case 18 : keysym = 0xFFE9; break; // Left ALT (Mac Command)
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default : keysym = evt.keyCode; break;
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}
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/* Remap symbols */
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switch (keysym) {
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case 186 : keysym = 59; break; // ; (IE)
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case 187 : keysym = 61; break; // = (IE)
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case 188 : keysym = 44; break; // , (Mozilla, IE)
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case 109 : // - (Mozilla)
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if (Util.Engine.gecko) {
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keysym = 45; }
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break;
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case 189 : keysym = 45; break; // - (IE)
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case 190 : keysym = 46; break; // . (Mozilla, IE)
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case 191 : keysym = 47; break; // / (Mozilla, IE)
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case 192 : keysym = 96; break; // ` (Mozilla, IE)
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case 219 : keysym = 91; break; // [ (Mozilla, IE)
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case 220 : keysym = 92; break; // \ (Mozilla, IE)
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case 221 : keysym = 93; break; // ] (Mozilla, IE)
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case 222 : keysym = 39; break; // ' (Mozilla, IE)
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}
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/* Remap shifted and unshifted keys */
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if (!!evt.shiftKey) {
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switch (keysym) {
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case 48 : keysym = 41 ; break; // ) (shifted 0)
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case 49 : keysym = 33 ; break; // ! (shifted 1)
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case 50 : keysym = 64 ; break; // @ (shifted 2)
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case 51 : keysym = 35 ; break; // # (shifted 3)
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case 52 : keysym = 36 ; break; // $ (shifted 4)
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case 53 : keysym = 37 ; break; // % (shifted 5)
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case 54 : keysym = 94 ; break; // ^ (shifted 6)
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case 55 : keysym = 38 ; break; // & (shifted 7)
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case 56 : keysym = 42 ; break; // * (shifted 8)
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case 57 : keysym = 40 ; break; // ( (shifted 9)
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case 59 : keysym = 58 ; break; // : (shifted `)
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case 61 : keysym = 43 ; break; // + (shifted ;)
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case 44 : keysym = 60 ; break; // < (shifted ,)
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case 45 : keysym = 95 ; break; // _ (shifted -)
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case 46 : keysym = 62 ; break; // > (shifted .)
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case 47 : keysym = 63 ; break; // ? (shifted /)
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case 96 : keysym = 126; break; // ~ (shifted `)
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case 91 : keysym = 123; break; // { (shifted [)
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case 92 : keysym = 124; break; // | (shifted \)
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case 93 : keysym = 125; break; // } (shifted ])
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case 39 : keysym = 34 ; break; // " (shifted ')
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}
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} else if ((keysym >= 65) && (keysym <=90)) {
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/* Remap unshifted A-Z */
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keysym += 32;
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}
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return keysym;
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}
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function onMouseButton(e, down) {
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var evt, pos, bmask;
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if (! conf.focused) {
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return true;
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}
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evt = (e ? e : window.event);
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pos = Util.getEventPosition(e, conf.target, conf.scale);
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bmask = 1 << evt.button;
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//Util.Debug('mouse ' + pos.x + "," + pos.y + " down: " + down + " bmask: " + bmask);
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if (c_mouseButton) {
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c_mouseButton(pos.x, pos.y, down, bmask);
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}
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Util.stopEvent(e);
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return false;
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}
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function onMouseDown(e) {
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onMouseButton(e, 1);
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}
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function onMouseUp(e) {
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onMouseButton(e, 0);
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}
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function onMouseWheel(e) {
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var evt, pos, bmask, wheelData;
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evt = (e ? e : window.event);
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pos = Util.getEventPosition(e, conf.target, conf.scale);
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wheelData = evt.detail ? evt.detail * -1 : evt.wheelDelta / 40;
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if (wheelData > 0) {
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bmask = 1 << 3;
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} else {
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bmask = 1 << 4;
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}
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//Util.Debug('mouse scroll by ' + wheelData + ':' + pos.x + "," + pos.y);
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if (c_mouseButton) {
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c_mouseButton(pos.x, pos.y, 1, bmask);
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c_mouseButton(pos.x, pos.y, 0, bmask);
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}
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Util.stopEvent(e);
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return false;
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}
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function onMouseMove(e) {
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var evt, pos;
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evt = (e ? e : window.event);
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pos = Util.getEventPosition(e, conf.target, conf.scale);
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//Util.Debug('mouse ' + evt.which + '/' + evt.button + ' up:' + pos.x + "," + pos.y);
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if (c_mouseMove) {
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c_mouseMove(pos.x, pos.y);
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}
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}
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function onKeyDown(e) {
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//Util.Debug("keydown: " + getKeysym(e));
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if (! conf.focused) {
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return true;
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}
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if (c_keyPress) {
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c_keyPress(getKeysym(e), 1);
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}
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Util.stopEvent(e);
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return false;
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}
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function onKeyUp(e) {
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//Util.Debug("keyup: " + getKeysym(e));
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if (! conf.focused) {
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return true;
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}
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if (c_keyPress) {
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c_keyPress(getKeysym(e), 0);
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}
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Util.stopEvent(e);
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return false;
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}
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function onMouseDisable(e) {
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var evt, pos;
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if (! conf.focused) {
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return true;
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}
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evt = (e ? e : window.event);
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pos = Util.getPosition(conf.target);
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/* Stop propagation if inside canvas area */
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if ((evt.clientX >= pos.x) &&
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(evt.clientY >= pos.y) &&
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(evt.clientX < (pos.x + c_width)) &&
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(evt.clientY < (pos.y + c_height))) {
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//Util.Debug("mouse event disabled");
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Util.stopEvent(e);
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return false;
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}
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//Util.Debug("mouse event not disabled");
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return true;
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}
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//
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// Public API interface functions
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//
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that.getContext = function () {
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return conf.ctx;
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};
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that.start = function(keyPressFunc, mouseButtonFunc, mouseMoveFunc) {
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var c;
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Util.Debug(">> Canvas.start");
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c = conf.target;
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c_keyPress = keyPressFunc || null;
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c_mouseButton = mouseButtonFunc || null;
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c_mouseMove = mouseMoveFunc || null;
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Util.addEvent(conf.focusContainer, 'keydown', onKeyDown);
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Util.addEvent(conf.focusContainer, 'keyup', onKeyUp);
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Util.addEvent(c, 'mousedown', onMouseDown);
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Util.addEvent(c, 'mouseup', onMouseUp);
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Util.addEvent(c, 'mousemove', onMouseMove);
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Util.addEvent(c, (Util.Engine.gecko) ? 'DOMMouseScroll' : 'mousewheel',
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onMouseWheel);
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/* Work around right and middle click browser behaviors */
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Util.addEvent(conf.focusContainer, 'click', onMouseDisable);
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Util.addEvent(conf.focusContainer.body, 'contextmenu', onMouseDisable);
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Util.Debug("<< Canvas.start");
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};
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that.rescale = function(factor) {
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var c, tp, x, y,
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properties = ['transform', 'WebkitTransform', 'MozTransform', null];
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c = conf.target;
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tp = properties.shift();
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while (tp) {
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if (typeof c.style[tp] !== 'undefined') {
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break;
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}
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tp = properties.shift();
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}
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if (tp === null) {
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Util.Debug("No scaling support");
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return;
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}
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if (conf.scale === factor) {
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//Util.Debug("Canvas already scaled to '" + factor + "'");
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return;
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}
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conf.scale = factor;
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x = c.width - c.width * factor;
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y = c.height - c.height * factor;
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c.style[tp] = "scale(" + conf.scale + ") translate(-" + x + "px, -" + y + "px)";
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};
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that.resize = function(width, height, true_color) {
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var c = conf.target;
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|
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if (typeof true_color !== "undefined") {
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conf.true_color = true_color;
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}
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c.width = width;
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c.height = height;
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c_width = c.offsetWidth;
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c_height = c.offsetHeight;
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that.rescale(conf.scale);
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};
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that.clear = function() {
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that.resize(640, 20);
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conf.ctx.clearRect(0, 0, c_width, c_height);
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};
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that.stop = function() {
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var c = conf.target;
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Util.removeEvent(conf.focusContainer, 'keydown', onKeyDown);
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Util.removeEvent(conf.focusContainer, 'keyup', onKeyUp);
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Util.removeEvent(c, 'mousedown', onMouseDown);
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Util.removeEvent(c, 'mouseup', onMouseUp);
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Util.removeEvent(c, 'mousemove', onMouseMove);
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Util.removeEvent(c, (Util.Engine.gecko) ? 'DOMMouseScroll' : 'mousewheel',
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onMouseWheel);
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/* Work around right and middle click browser behaviors */
|
|
Util.removeEvent(conf.focusContainer, 'click', onMouseDisable);
|
|
Util.removeEvent(conf.focusContainer.body, 'contextmenu', onMouseDisable);
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// Turn off cursor rendering
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|
if (conf.cursor_uri) {
|
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c.style.cursor = "default";
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}
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};
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setFillColor = function(color) {
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var rgb, newStyle;
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if (conf.true_color) {
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rgb = color;
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} else {
|
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rgb = conf.colourMap[color[0]];
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}
|
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if (newStyle !== c_prevStyle) {
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newStyle = "rgb(" + rgb[0] + "," + rgb[1] + "," + rgb[2] + ")";
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conf.ctx.fillStyle = newStyle;
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c_prevStyle = newStyle;
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}
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};
|
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that.setFillColor = setFillColor;
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fillRect = function(x, y, width, height, color) {
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setFillColor(color);
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conf.ctx.fillRect(x, y, width, height);
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};
|
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that.fillRect = fillRect;
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|
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that.copyImage = function(old_x, old_y, new_x, new_y, width, height) {
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conf.ctx.drawImage(conf.target, old_x, old_y, width, height,
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|
new_x, new_y, width, height);
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|
};
|
|
|
|
/*
|
|
* Tile rendering functions optimized for rendering engines.
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|
*
|
|
* - In Chrome/webkit, Javascript image data array manipulations are
|
|
* faster than direct Canvas fillStyle, fillRect rendering. In
|
|
* gecko, Javascript array handling is much slower.
|
|
*/
|
|
that.getTile = function(x, y, width, height, color) {
|
|
var img, data, p, rgb, red, green, blue, j, i;
|
|
img = {'x': x, 'y': y, 'width': width, 'height': height,
|
|
'data': []};
|
|
if (conf.prefer_js) {
|
|
data = img.data;
|
|
if (conf.true_color) {
|
|
rgb = color;
|
|
} else {
|
|
rgb = conf.colourMap[color[0]];
|
|
}
|
|
red = rgb[0];
|
|
green = rgb[1];
|
|
blue = rgb[2];
|
|
for (j = 0; j < height; j += 1) {
|
|
for (i = 0; i < width; i += 1) {
|
|
p = (i + (j * width) ) * 4;
|
|
data[p + 0] = red;
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|
data[p + 1] = green;
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|
data[p + 2] = blue;
|
|
//data[p + 3] = 255; // Set Alpha
|
|
}
|
|
}
|
|
} else {
|
|
fillRect(x, y, width, height, color);
|
|
}
|
|
return img;
|
|
};
|
|
|
|
that.setSubTile = function(img, x, y, w, h, color) {
|
|
var data, p, rgb, red, green, blue, width, j, i;
|
|
if (conf.prefer_js) {
|
|
data = img.data;
|
|
width = img.width;
|
|
if (conf.true_color) {
|
|
rgb = color;
|
|
} else {
|
|
rgb = conf.colourMap[color[0]];
|
|
}
|
|
red = rgb[0];
|
|
green = rgb[1];
|
|
blue = rgb[2];
|
|
for (j = 0; j < h; j += 1) {
|
|
for (i = 0; i < w; i += 1) {
|
|
p = (x + i + ((y + j) * width) ) * 4;
|
|
data[p + 0] = red;
|
|
data[p + 1] = green;
|
|
data[p + 2] = blue;
|
|
//img.data[p + 3] = 255; // Set Alpha
|
|
}
|
|
}
|
|
} else {
|
|
fillRect(img.x + x, img.y + y, w, h, color);
|
|
}
|
|
};
|
|
|
|
that.putTile = function(img) {
|
|
if (conf.prefer_js) {
|
|
that.rgbxImage(img.x, img.y, img.width, img.height, img.data, 0);
|
|
} else {
|
|
// No-op, under gecko already done by setSubTile
|
|
}
|
|
};
|
|
|
|
that.imageDataGet = function(width, height) {
|
|
return conf.ctx.getImageData(0, 0, width, height);
|
|
};
|
|
that.imageDataCreate = function(width, height) {
|
|
return conf.ctx.createImageData(width, height);
|
|
};
|
|
|
|
that.rgbxImageData = function(x, y, width, height, arr, offset) {
|
|
var img, i, j, data;
|
|
img = that.imageData(width, height);
|
|
data = img.data;
|
|
for (i=0, j=offset; i < (width * height * 4); i=i+4, j=j+4) {
|
|
data[i + 0] = arr[j + 0];
|
|
data[i + 1] = arr[j + 1];
|
|
data[i + 2] = arr[j + 2];
|
|
data[i + 3] = 255; // Set Alpha
|
|
}
|
|
conf.ctx.putImageData(img, x, y);
|
|
};
|
|
|
|
// really slow fallback if we don't have imageData
|
|
that.rgbxImageFill = function(x, y, width, height, arr, offset) {
|
|
var i, j, sx = 0, sy = 0;
|
|
for (i=0, j=offset; i < (width * height); i+=1, j+=4) {
|
|
fillRect(x+sx, y+sy, 1, 1, [arr[j+0], arr[j+1], arr[j+2]]);
|
|
sx += 1;
|
|
if ((sx % width) === 0) {
|
|
sx = 0;
|
|
sy += 1;
|
|
}
|
|
}
|
|
};
|
|
|
|
that.cmapImageData = function(x, y, width, height, arr, offset) {
|
|
var img, i, j, data, rgb, cmap;
|
|
img = that.imageData(width, height);
|
|
data = img.data;
|
|
cmap = conf.colourMap;
|
|
for (i=0, j=offset; i < (width * height * 4); i+=4, j+=1) {
|
|
rgb = cmap[arr[j]];
|
|
data[i + 0] = rgb[0];
|
|
data[i + 1] = rgb[1];
|
|
data[i + 2] = rgb[2];
|
|
data[i + 3] = 255; // Set Alpha
|
|
}
|
|
conf.ctx.putImageData(img, x, y);
|
|
};
|
|
|
|
that.cmapImageFill = function(x, y, width, height, arr, offset) {
|
|
var i, j, sx = 0, sy = 0, cmap;
|
|
cmap = conf.colourMap;
|
|
for (i=0, j=offset; i < (width * height); i+=1, j+=1) {
|
|
fillRect(x+sx, y+sy, 1, 1, [arr[j]]);
|
|
sx += 1;
|
|
if ((sx % width) === 0) {
|
|
sx = 0;
|
|
sy += 1;
|
|
}
|
|
}
|
|
};
|
|
|
|
|
|
that.blitImage = function(x, y, width, height, arr, offset) {
|
|
if (conf.true_color) {
|
|
that.rgbxImage(x, y, width, height, arr, offset);
|
|
} else {
|
|
that.cmapImage(x, y, width, height, arr, offset);
|
|
}
|
|
};
|
|
|
|
that.blitStringImage = function(str, x, y) {
|
|
var img = new Image();
|
|
img.onload = function () { conf.ctx.drawImage(img, x, y); };
|
|
img.src = str;
|
|
};
|
|
|
|
that.changeCursor = function(pixels, mask, hotx, hoty, w, h) {
|
|
var cur = [], cmap, rgb, IHDRsz, ANDsz, XORsz, url, idx, alpha, x, y;
|
|
//Util.Debug(">> changeCursor, x: " + hotx + ", y: " + hoty + ", w: " + w + ", h: " + h);
|
|
|
|
if (conf.cursor_uri === false) {
|
|
Util.Warn("changeCursor called but no cursor data URI support");
|
|
return;
|
|
}
|
|
|
|
// Push multi-byte little-endian values
|
|
cur.push16le = function (num) {
|
|
this.push((num ) & 0xFF,
|
|
(num >> 8) & 0xFF );
|
|
};
|
|
cur.push32le = function (num) {
|
|
this.push((num ) & 0xFF,
|
|
(num >> 8) & 0xFF,
|
|
(num >> 16) & 0xFF,
|
|
(num >> 24) & 0xFF );
|
|
};
|
|
|
|
cmap = conf.colourMap;
|
|
IHDRsz = 40;
|
|
ANDsz = w * h * 4;
|
|
XORsz = Math.ceil( (w * h) / 8.0 );
|
|
|
|
// Main header
|
|
cur.push16le(0); // Reserved
|
|
cur.push16le(2); // .CUR type
|
|
cur.push16le(1); // Number of images, 1 for non-animated ico
|
|
|
|
// Cursor #1 header
|
|
cur.push(w); // width
|
|
cur.push(h); // height
|
|
cur.push(0); // colors, 0 -> true-color
|
|
cur.push(0); // reserved
|
|
cur.push16le(hotx); // hotspot x coordinate
|
|
cur.push16le(hoty); // hotspot y coordinate
|
|
cur.push32le(IHDRsz + XORsz + ANDsz); // cursor data byte size
|
|
cur.push32le(22); // offset of cursor data in the file
|
|
|
|
// Cursor #1 InfoHeader
|
|
cur.push32le(IHDRsz); // Infoheader size
|
|
cur.push32le(w); // Cursor width
|
|
cur.push32le(h*2); // XOR+AND height
|
|
cur.push16le(1); // number of planes
|
|
cur.push16le(32); // bits per pixel
|
|
cur.push32le(0); // Type of compression
|
|
cur.push32le(XORsz + ANDsz); // Size of Image
|
|
cur.push32le(0);
|
|
cur.push32le(0);
|
|
cur.push32le(0);
|
|
cur.push32le(0);
|
|
|
|
// XOR/color data
|
|
for (y = h-1; y >= 0; y -= 1) {
|
|
for (x = 0; x < w; x += 1) {
|
|
idx = y * Math.ceil(w / 8) + Math.floor(x/8);
|
|
alpha = (mask[idx] << (x % 8)) & 0x80 ? 255 : 0;
|
|
|
|
if (conf.true_color) {
|
|
idx = ((w * y) + x) * 4;
|
|
cur.push(pixels[idx + 2]); // blue
|
|
cur.push(pixels[idx + 1]); // green
|
|
cur.push(pixels[idx + 0]); // red
|
|
cur.push(alpha); // red
|
|
} else {
|
|
idx = (w * y) + x;
|
|
rgb = cmap[pixels[idx]];
|
|
cur.push(rgb[2]); // blue
|
|
cur.push(rgb[1]); // green
|
|
cur.push(rgb[0]); // red
|
|
cur.push(alpha); // alpha
|
|
}
|
|
}
|
|
}
|
|
|
|
// AND/bitmask data (ignored, just needs to be right size)
|
|
for (y = 0; y < h; y += 1) {
|
|
for (x = 0; x < Math.ceil(w / 8); x += 1) {
|
|
cur.push(0x00);
|
|
}
|
|
}
|
|
|
|
url = "data:image/x-icon;base64," + Base64.encode(cur);
|
|
conf.target.style.cursor = "url(" + url + ") " + hotx + " " + hoty + ", default";
|
|
//Util.Debug("<< changeCursor, cur.length: " + cur.length);
|
|
};
|
|
|
|
|
|
|
|
return constructor(); // Return the public API interface
|
|
|
|
} // End of Canvas()
|
|
|