Merge pull request #5418 from TrevorDev/screenshotMirrorStretch

fix stretching in mirror texture when taking snapshot

dist/preview release/what's new.md

@@ -62,6 +62,7 @@
 - Refocusing on input gui with pointer events ([TrevorDev](https://github.com/TrevorDev))
 - Gizmo scaling not consistent when camera is parented ([TrevorDev](https://github.com/TrevorDev))
 - Context loss causing unexpected results with dynamic textures ([TrevorDev](https://github.com/TrevorDev))
+- CreateScreenshotUsingRenderTarget stretches mirror textures when setting both width and height ([TrevorDev](https://github.com/TrevorDev))
 
 ### Core Engine
 - Fixed a bug with `mesh.alwaysSelectAsActiveMesh` preventing layerMask to be taken in account ([Deltakosh](https://github.com/deltakosh))

src/Tools/babylon.tools.ts

@@ -1517,6 +1517,16 @@ module BABYLON {
                 scene.activeCamera = camera;
             }
 
+            var renderCanvas = engine.getRenderingCanvas();
+            if (!renderCanvas) {
+                Tools.Error("No rendering canvas found !");
+                return;
+            }
+
+            var originalSize = {width: renderCanvas.width, height: renderCanvas.height};
+            engine.setSize(width, height);
+            scene.render();
+
             // At this point size can be a number, or an object (according to engine.prototype.createRenderTargetTexture method)
             var texture = new RenderTargetTexture("screenShot", size, scene, false, false, Engine.TEXTURETYPE_UNSIGNED_INT, false, Texture.NEAREST_SAMPLINGMODE);
             texture.renderList = null;
@@ -1536,7 +1546,7 @@ module BABYLON {
             if (previousCamera) {
                 scene.activeCamera = previousCamera;
             }
-
+            engine.setSize(originalSize.width, originalSize.height);
             camera.getProjectionMatrix(true); // Force cache refresh;
         }