X-Git-Url: https://git-public.kairo.at/?p=lantea.git;a=blobdiff_plain;f=js%2Fmap.js;h=f6b9d86200761cff1e12d65afb1d2b0f9bc661ea;hp=cf095cb13f3d199e4226791a4fbde8dfa5ebcb9c;hb=8f63227ba50180ec312ec822c09bb789fb0be3f2;hpb=0c7de38028c2e5a599ba6e3c18f2a6b00061439a diff --git a/js/map.js b/js/map.js index cf095cb..f6b9d86 100644 --- a/js/map.js +++ b/js/map.js @@ -72,11 +72,19 @@ function initMap() { gGLMapCanvas.getContext("experimental-webgl", {depth: false}); } catch(e) {} - // If we don't have a GL context, give up now if (!gMap.gl) { + // If we don't have a GL context, give up now showGLWarningDialog(); gMap.gl = null; } + else { + // GL context can be lost at any time, handle that. + // See http://www.khronos.org/webgl/wiki/HandlingContextLost + gGLMapCanvas.addEventListener("webglcontextlost", + gMap.handleContextLost, false); + gGLMapCanvas.addEventListener("webglcontextrestored", + gMap.handleContextRestored, false); + } gTrackCanvas = document.getElementById("track"); gTrackContext = gTrackCanvas.getContext("2d"); if (!gMap.activeMap) @@ -121,15 +129,21 @@ function loadPrefs(aEvent) { document.getElementById("body").addEventListener("keydown", mapEvHandler, false); + document.addEventListener("visibilitychange", visibilityEvHandler, false); + + console.log("Events added."); document.getElementById("copyright").innerHTML = gMapStyles[gMap.activeMap].copyright; + console.log("Init loading tile..."); gLoadingTile = new Image(); - gLoadingTile.src = "style/loading.png"; gLoadingTile.onload = function() { + console.log("Loading tile loaded."); var throwEv = new CustomEvent("prefload-done"); gAction.dispatchEvent(throwEv); }; + console.log("Set loading tile..."); + gLoadingTile.src = "style/loading.png"; } } else { @@ -173,11 +187,14 @@ function loadPrefs(aEvent) { if (aTPoint) { // Add in front and return new length. var tracklen = gTrack.unshift(aTPoint); - // Redraw track periodically, larger distance the longer it gets. + // Redraw track periodically, larger distance the longer it gets + // (but clamped to the first value over a certain limit). // Initial paint will do initial track drawing. if (tracklen % redrawBase == 0) { drawTrack(); - redrawBase = tracklen; + if (redrawBase < 1000) { + redrawBase = tracklen; + } } } else { @@ -235,7 +252,7 @@ var gMap = { ' gl_Position = vec4(clipSpace * vec2(1, -1), 0, 1);\n' + ' vTextureCoord = aTextureCoord;\n' + '}'; }, - getFragShaderSource:function() { + getFragShaderSource: function() { return 'varying highp vec2 vTextureCoord;\n\n' + 'uniform sampler2D uImage;\n\n' + 'void main(void) {\n' + @@ -244,12 +261,14 @@ var gMap = { initGL: function() { // When called from the event listener, the "this" reference doesn't work, so use the object name. + console.log("Initializing WebGL..."); if (gMap.gl) { gMap.gl.viewport(0, 0, gMap.gl.drawingBufferWidth, gMap.gl.drawingBufferHeight); gMap.gl.clearColor(0.0, 0.0, 0.0, 0.5); // Set clear color to black, fully opaque. gMap.gl.clear(gMap.gl.COLOR_BUFFER_BIT|gMap.gl.DEPTH_BUFFER_BIT); // Clear the color. // Create and initialize the shaders. + console.log("Create and compile shaders..."); var vertShader = gMap.gl.createShader(gMap.gl.VERTEX_SHADER); var fragShader = gMap.gl.createShader(gMap.gl.FRAGMENT_SHADER); gMap.gl.shaderSource(vertShader, gMap.getVertShaderSource()); @@ -269,6 +288,7 @@ var gMap = { return null; } + console.log("Create and link shader program..."); gMap.glShaderProgram = gMap.gl.createProgram(); gMap.gl.attachShader(gMap.glShaderProgram, vertShader); gMap.gl.attachShader(gMap.glShaderProgram, fragShader); @@ -283,6 +303,7 @@ var gMap = { gMap.glTextureCoordAttr = gMap.gl.getAttribLocation(gMap.glShaderProgram, "aTextureCoord"); gMap.glResolutionAttr = gMap.gl.getUniformLocation(gMap.glShaderProgram, "uResolution"); + console.log("Set up vertex buffer..."); var tileVerticesBuffer = gMap.gl.createBuffer(); gMap.gl.bindBuffer(gMap.gl.ARRAY_BUFFER, tileVerticesBuffer); // The vertices are the coordinates of the corner points of the square. @@ -303,6 +324,7 @@ var gMap = { gMap.gl.uniform2f(gMap.glResolutionAttr, gGLMapCanvas.width, gGLMapCanvas.height); // Create a buffer for the position of the rectangle corners. + console.log("Set up coord buffer..."); var mapVerticesTextureCoordBuffer = gMap.gl.createBuffer(); gMap.gl.bindBuffer(gMap.gl.ARRAY_BUFFER, mapVerticesTextureCoordBuffer); gMap.gl.enableVertexAttribArray(gMap.glVertexPositionAttr); @@ -312,8 +334,13 @@ var gMap = { gMap.glTxCleanIntervalID = window.setInterval(gMap.cleanTextures, 30 * 1000); } - var throwEv = new CustomEvent("mapinit-done"); - gAction.dispatchEvent(throwEv); + if (!gAppInitDone) { + // We may be called when context was lost and destroyed, + // only send event when we are in app startup + // (gAppInitDone is set to true right after we return this event). + var throwEv = new CustomEvent("mapinit-done"); + gAction.dispatchEvent(throwEv); + } }, draw: function() { @@ -355,7 +382,9 @@ var gMap = { var imgObj = new Image(); imgObj.onload = function() { gMap.loadImageToTexture(imgObj, aTileKey); - window.requestAnimationFrame(function(aTimestamp) { gMap.drawGL() }); + if (document.hidden != true) { // Only draw if we're actually visible. + window.requestAnimationFrame(function(aTimestamp) { gMap.drawGL() }); + } URL.revokeObjectURL(imgURL); } imgObj.src = imgURL; @@ -364,7 +393,9 @@ var gMap = { } } } - window.requestAnimationFrame(function(aTimestamp) { gMap.drawGL() }); + if (document.hidden != true) { // Only draw if we're actually visible. + window.requestAnimationFrame(function(aTimestamp) { gMap.drawGL() }); + } }, drawGL: function() { @@ -469,8 +500,8 @@ var gMap = { y: Math.ceil((gMap.pos.y + gMap.baseDim.ht / 2) / gMap.baseDim.tsize) + 1, z: gMap.pos.z}); console.log("In range: " + tMin.x + "," + tMin.y + "," + tMin.z + " - " + tMax.x + "," + tMax.y + "," + tMax.z); - for (aTileKey in gMap.glTextures) { - var keyMatches = aTileKey.match(/([^:]+)::(\d+),(\d+),(\d+)/); + for (var tileKey in gMap.glTextures) { + var keyMatches = tileKey.match(/([^:]+)::(\d+),(\d+),(\d+)/); if (keyMatches && keyMatches[1] != "loading") { var txData = { style: keyMatches[1], @@ -497,15 +528,27 @@ var gMap = { } if (delTx) { // Delete texture from GL and from the array we are holding. - gMap.gl.deleteTexture(gMap.glTextures[aTileKey]); - delete gMap.glTextures[aTileKey]; + gMap.gl.deleteTexture(gMap.glTextures[tileKey]); + delete gMap.glTextures[tileKey]; } } } console.log("Cleaning complete, " + Object.keys(gMap.glTextures).length + " textures left)"); - //clearInterval(gMap.glTxCleanIntervalID); } }, + + handleContextLost: function(event) { + event.preventDefault(); + // GL context is gone, let's reset everything that depends on it. + clearInterval(gMap.glTxCleanIntervalID); + gMap.glTextures = {}; + }, + + handleContextRestored: function(event) { + // When GL context is back, init GL again and draw. + gMap.initGL(); + gMap.draw(); + }, } // Using scale(x, y) together with drawing old data on scaled canvas would be an improvement for zooming. @@ -611,13 +654,15 @@ function decodeIndex(encodedIdx) { } function drawTrack() { - gLastDrawnPoint = null; - gCurPosMapCache = undefined; - gTrackContext.clearRect(0, 0, gTrackCanvas.width, gTrackCanvas.height); - if (gTrack.length) { - for (var i = 0; i < gTrack.length; i++) { - drawTrackPoint(gTrack[i].coords.latitude, gTrack[i].coords.longitude, - (i + 1 >= gTrack.length)); + if (gTrackContext && (document.hidden != true)) { // Only draw if we're actually visible. + gLastDrawnPoint = null; + gCurPosMapCache = undefined; + gTrackContext.clearRect(0, 0, gTrackCanvas.width, gTrackCanvas.height); + if (gTrack.length) { + for (var i = 0; i < gTrack.length; i++) { + drawTrackPoint(gTrack[i].coords.latitude, gTrack[i].coords.longitude, + (i + 1 >= gTrack.length)); + } } } } @@ -695,6 +740,54 @@ function undrawCurrentLocation() { } } +function calcTrackDuration() { + // Get the duration of the track in s. + var tDuration = 0; + if (gTrack.length > 1) { + for (var i = 1; i < gTrack.length; i++) { + if (!gTrack[i].beginSegment) { + tDuration += (gTrack[i].time - gTrack[i-1].time); + } + } + } + return Math.round(tDuration / 1000); // The timestamps are in ms but we return seconds. +} + +function calcTrackLength() { + // Get the length of the track in km. + var tLength = 0; + if (gTrack.length > 1) { + for (var i = 1; i < gTrack.length; i++) { + if (!gTrack[i].beginSegment) { + tLength += getPointDistance(gTrack[i-1].coords, gTrack[i].coords); + } + } + } + return tLength; +} + +function getPointDistance(aGPSPoint1, aGPSPoint2) { + // Get the distance in km between the two given GPS points. + // See http://stackoverflow.com/questions/365826/calculate-distance-between-2-gps-coordinates + // Earth is almost exactly a sphere and we calculate small distances on the surface, so we can do spherical great-circle math. + // Also see http://en.wikipedia.org/wiki/Great-circle_distance + var R = 6371; // km + var dLat = deg2rad(aGPSPoint2.latitude - aGPSPoint1.latitude); + var dLon = deg2rad(aGPSPoint2.longitude - aGPSPoint1.longitude); + var lat1 = deg2rad(aGPSPoint1.latitude); + var lat2 = deg2rad(aGPSPoint2.latitude); + + var a = Math.sin(dLat/2) * Math.sin(dLat/2) + + Math.sin(dLon/2) * Math.sin(dLon/2) * Math.cos(lat1) * Math.cos(lat2); + var c = 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1-a)); + return R * c; +} + +function deg2rad(aDegreeValue) { + // Convert an angle in degrees to radiants. + return aDegreeValue * (Math.PI / 180); +} + var mapEvHandler = { handleEvent: function(aEvent) { var touchEvent = aEvent.type.indexOf('touch') != -1; @@ -926,6 +1019,15 @@ var mapEvHandler = { } }; +function visibilityEvHandler() { + // Immediately draw if we just got visible. + if (document.hidden != true) { + gMap.draw(); + } + // No need to handle the event where we become invisible as we care only draw + // when we are visible anyhow. +} + var geofake = { tracking: false, lastPos: {x: undefined, y: undefined}, @@ -1069,8 +1171,8 @@ var gTileService = { .replace("{x}", norm.x) .replace("{y}", norm.y) .replace("{z}", norm.z) - .replace("[a-c]", String.fromCharCode(97 + Math.floor(Math.random() * 2))) - .replace("[1-4]", 1 + Math.floor(Math.random() * 3)), + .replace("[a-c]", String.fromCharCode(97 + Math.floor(Math.random() * 3))) + .replace("[1-4]", 1 + Math.floor(Math.random() * 4)), true); XHR.responseType = "blob"; XHR.addEventListener("load", function () {