Fix issue with rescaler and lost context

Playground/indexStable.html

@@ -45,6 +45,8 @@
     <script src="https://cdn.babylonjs.com/loaders/babylon.objFileLoader.js"></script>
     <script src="https://cdn.babylonjs.com/loaders/babylon.stlFileLoader.js"></script>
 
+    <script src="https://cdn.babylonjs.com/gui/babylon.gui.min.js"></script>    
+
     <script src="https://rawgit.com/BabylonJS/Extensions/master/ClonerSystem/src/babylonx.cloner.js"></script>
     <link href="css/index.css" rel="stylesheet" />
 </head>

Tools/Gulp/config.json

@@ -1424,7 +1424,6 @@
         "libraries": [
             {
                 "files": [
-                    "../../gui/src/interfaces/focusableControl.ts",
                     "../../gui/src/advancedDynamicTexture.ts",
                     "../../gui/src/measure.ts",
                     "../../gui/src/math2D.ts",

dist/preview release/babylon.max.js

@@ -9880,7 +9880,11 @@ var BABYLON;
                 _this._rescalePostProcess.onApply = function (effect) {
                     effect._bindTexture("textureSampler", source);
                 };
-                scene.postProcessManager.directRender([_this._rescalePostProcess], rtt);
+                var hostingScene = scene;
+                if (!hostingScene) {
+                    hostingScene = _this.scenes[_this.scenes.length - 1];
+                }
+                hostingScene.postProcessManager.directRender([_this._rescalePostProcess], rtt);
                 _this._bindTextureDirectly(_this._gl.TEXTURE_2D, destination);
                 _this._gl.copyTexImage2D(_this._gl.TEXTURE_2D, 0, internalFormat, 0, 0, destination.width, destination.height, 0);
                 _this.unBindFramebuffer(rtt);

dist/preview release/customConfigurations/minimalGLTFViewer/babylon.max.js

@@ -9880,7 +9880,11 @@ var BABYLON;
                 _this._rescalePostProcess.onApply = function (effect) {
                     effect._bindTexture("textureSampler", source);
                 };
-                scene.postProcessManager.directRender([_this._rescalePostProcess], rtt);
+                var hostingScene = scene;
+                if (!hostingScene) {
+                    hostingScene = _this.scenes[_this.scenes.length - 1];
+                }
+                hostingScene.postProcessManager.directRender([_this._rescalePostProcess], rtt);
                 _this._bindTextureDirectly(_this._gl.TEXTURE_2D, destination);
                 _this._gl.copyTexImage2D(_this._gl.TEXTURE_2D, 0, internalFormat, 0, 0, destination.width, destination.height, 0);
                 _this.unBindFramebuffer(rtt);

dist/preview release/gui/babylon.gui.d.ts

@@ -1,13 +1,10 @@
+
 declare module BABYLON.GUI {
     interface IFocusableControl {
         onFocus(): void;
         onBlur(): void;
         processKeyboard(evt: KeyboardEvent): void;
     }
-}
-
-
-declare module BABYLON.GUI {
     class AdvancedDynamicTexture extends DynamicTexture {
         private _isDirty;
         private _renderObserver;

dist/preview release/gui/babylon.gui.js

@@ -1,7 +1,3 @@
-
-
-//# sourceMappingURL=focusableControl.js.map
-
 /// <reference path="../../dist/preview release/babylon.d.ts"/>
 var __extends = (this && this.__extends) || (function () {
     var extendStatics = Object.setPrototypeOf ||
@@ -3378,6 +3374,8 @@ var BABYLON;
     })(GUI = BABYLON.GUI || (BABYLON.GUI = {}));
 })(BABYLON || (BABYLON = {}));
 
+//# sourceMappingURL=button.js.map
+
 /// <reference path="../../../dist/preview release/babylon.d.ts"/>
 var __extends = (this && this.__extends) || (function () {
     var extendStatics = Object.setPrototypeOf ||

dist/preview release/gui/babylon.gui.module.d.ts

@@ -1,13 +1,10 @@
+/// <reference path="../../dist/preview release/babylon.d.ts" />
 declare module BABYLON.GUI {
     interface IFocusableControl {
         onFocus(): void;
         onBlur(): void;
         processKeyboard(evt: KeyboardEvent): void;
     }
-}
-
-/// <reference path="../../dist/preview release/babylon.d.ts" />
-declare module BABYLON.GUI {
     class AdvancedDynamicTexture extends DynamicTexture {
         private _isDirty;
         private _renderObserver;

gui/src/advancedDynamicTexture.ts

@@ -1,6 +1,12 @@
 /// <reference path="../../dist/preview release/babylon.d.ts"/>
 
 module BABYLON.GUI {
+    export interface IFocusableControl {
+        onFocus(): void;
+        onBlur(): void;
+        processKeyboard(evt: KeyboardEvent): void;
+    }
+
     export class AdvancedDynamicTexture extends DynamicTexture {
         private _isDirty = false;
         private _renderObserver: Observer<Camera>;

gui/src/interfaces/focusableControl.ts

@@ -1,7 +0,0 @@
-module BABYLON.GUI {
-    export interface IFocusableControl {
-        onFocus(): void;
-        onBlur(): void;
-        processKeyboard(evt: KeyboardEvent): void;
-    }
-}

localDev/index.html

@@ -43,7 +43,7 @@
 	
 	<script>
 		var canvas = document.getElementById("renderCanvas");
-		// canvas = WebGLDebugUtils.makeLostContextSimulatingCanvas(canvas);
+	//	canvas = WebGLDebugUtils.makeLostContextSimulatingCanvas(canvas);
 		var divFps = document.getElementById("fps");
 
 		// Global to simulate PG.

src/babylon.engine.ts

@@ -2844,12 +2844,18 @@
             if (!this._rescalePostProcess) {
                 this._rescalePostProcess = new BABYLON.PassPostProcess("rescale", 1, null, Texture.BILINEAR_SAMPLINGMODE, this, false, Engine.TEXTURETYPE_UNSIGNED_INT);
             }
+
             this._rescalePostProcess.getEffect().executeWhenCompiled(() => {
                 this._rescalePostProcess.onApply = function (effect) {
                     effect._bindTexture("textureSampler", source);
                 }
 
-                scene.postProcessManager.directRender([this._rescalePostProcess], rtt);
+                let hostingScene = scene;
+
+                if (!hostingScene) {
+                    hostingScene = this.scenes[this.scenes.length - 1];
+                }
+                hostingScene.postProcessManager.directRender([this._rescalePostProcess], rtt);
 
                 this._bindTextureDirectly(this._gl.TEXTURE_2D, destination);
                 this._gl.copyTexImage2D(this._gl.TEXTURE_2D, 0, internalFormat, 0, 0, destination.width, destination.height, 0);