BaseCamera.renderRoundPixels is a new read-only property that is se…

…t during the Camera `preRender` method every frame. It is true if the Camera is set to render round pixels and the zoom values are integers, otherwise it is false. This is then fed into the MultiPipeline when rendering sprites and textures.

src/cameras/2d/BaseCamera.js

@@ -517,6 +517,22 @@ var BaseCamera = new Class({
          * @since 3.60.0
          */
         this.isSceneCamera = true;
+
+        /**
+         * Can this Camera render rounded pixel values?
+         * 
+         * This property is updated during the `preRender` method and should not be
+         * set directly. It is set based on the `roundPixels` property of the Camera
+         * combined with the zoom level. If the zoom is an integer then the WebGL
+         * Renderer can apply rounding during rendering.
+         *
+         * @name Phaser.Cameras.Scene2D.BaseCamera#renderRoundPixels
+         * @type {boolean}
+         * @readonly
+         * @default true
+         * @since 3.86.0
+         */
+        this.renderRoundPixels = true;
     },
 
     /**

src/cameras/2d/Camera.js

@@ -501,6 +501,8 @@ var Camera = new Class({
         var zoomY = this.zoomY;
         var matrix = this.matrix;
 
+        this.renderRoundPixels = (this.roundPixels && Number.isInteger(zoomX) && Number.isInteger(zoomY));
+
         var originX = width * this.originX;
         var originY = height * this.originY;
 
@@ -589,7 +591,8 @@ var Camera = new Class({
             Math.floor(this.x + originX + 0.5),
             Math.floor(this.y + originY + 0.5),
             this.rotation,
-            zoomX, zoomY);
+            zoomX, zoomY
+        );
 
         matrix.translate(-originX, -originY);