videocontext - npm Package Compare versions

Comparing version 0.17.0 to 0.18.0

package.json

 {
   "name": "videocontext",
-  "version": "0.17.0",
+  "version": "0.18.0",
   "description": "A WebGL & HTML5 graph based video composition library",
@@ -5,0 +5,0 @@ "contributors": [

src/utils.js

@@ -378,2 +378,4 @@ //Matthew Shotton, R&D User Experience,© BBC 2015
 
+    if (currentTime > playlistDuration && !videoContext.endOnLastSourceEnd) playlistDuration = currentTime;
+
     if (videoContext.duration === Infinity){
@@ -380,0 +382,0 @@ let total = 0;

src/videocontext.js

@@ -45,5 +45,13 @@ //Matthew Shotton, R&D User Experience,© BBC 2015
     */
-    constructor(canvas, initErrorCallback){
+    constructor(canvas, initErrorCallback, options={"preserveDrawingBuffer":true, "manualUpdate":false, "endOnLastSourceEnd":true}){
         this._canvas = canvas;
-        this._gl = canvas.getContext("experimental-webgl", { preserveDrawingBuffer: true, alpha: false });
+        let manualUpdate = false;
+        let preserveDrawingBuffer = true;
+        this.endOnLastSourceEnd = true;
+
+        if ("manualUpdate" in options) manualUpdate = options.manualUpdate;
+        if ("preserveDrawingBuffer" in options) preserveDrawingBuffer = options.preserveDrawingBuffer;
+        if ("endOnLastSourceEnd" in options) this.endOnLastSourceEnd = options.endOnLastSourceEnd;
+
+        this._gl = canvas.getContext("experimental-webgl", { preserveDrawingBuffer: preserveDrawingBuffer, alpha: false });
         if(this._gl === null){
@@ -55,3 +63,2 @@ console.error("Failed to intialise WebGL.");
 
-        this.endOnLastSourceEnd = true;
 
@@ -74,3 +81,5 @@ this._renderGraph = new RenderGraph();
 
-        registerUpdateable(this);
+        if(!manualUpdate){
+            registerUpdateable(this);
+        }
     }
@@ -591,2 +600,28 @@
 
+
+    /**
+    * This allows manual calling of the update loop of the videoContext. 
+    *
+    * @param {Number} dt - The difference in seconds between this and the previous calling of update.
+    * @example
+    *
+    * var canvasElement = document.getElemenyById("canvas");
+    * var ctx = new VideoContext(canvasElement, undefined, {"manualUpdate" : true});
+    * 
+    * var previousTime;
+    * function update(time){
+    *     if (previousTime === undefined) previousTime = time;
+    *     var dt = (time - previousTime)/1000;
+    *     ctx.update(dt);
+    *     previousTime = time;
+    *     requestAnimationFrame(update);
+    * }
+    * update();
+    *
+    */
+    update(dt){
+        this._update(dt);
+    }
+
+
     _update(dt){
@@ -593,0 +628,0 @@ if (this._state === VideoContext.STATE.PLAYING || this._state === VideoContext.STATE.STALLED || this._state === VideoContext.STATE.PAUSED) {

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Improved metrics

Total package byte prevSize

2042976

increased by0.22%

Lines of code

11489

increased by0.87%

No dependency changes