From bc5c7cf7abc7471a80f07a7164c75f0a7b18b60b Mon Sep 17 00:00:00 2001
From: Richard Davey <rich@photonstorm.com>
Date: Thu, 19 Sep 2019 23:32:40 +0100
Subject: [PATCH] When calling `Shader.setRenderToTexture()` it will now draw
 the shader just once, immediately to the texture, to avoid the texture being
 blank for a single frame (thanks Kyle)

---
 CHANGELOG.md                     |  4 ++++
 src/gameobjects/shader/Shader.js | 14 ++++++++++++++
 2 files changed, 18 insertions(+)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4afb3ea95..1c011abf2 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,10 @@
 
 * `GameConfig.antialiasGL` is a new boolean that allows you to set the `antialias` property of the WebGL context during creation, without impacting any subsequent textures or the canvas CSS.
 
+### Updates
+
+* When calling `Shader.setRenderToTexture()` it will now draw the shader just once, immediately to the texture, to avoid the texture being blank for a single frame (thanks Kyle)
+
 ### Bug Fixes
 
 * `SpineCanvasPlugin.shutdown` would try to dispose of the `sceneRenderer`, but the property isn't set for Canvas.
diff --git a/src/gameobjects/shader/Shader.js b/src/gameobjects/shader/Shader.js
index 38814022f..ad879217a 100644
--- a/src/gameobjects/shader/Shader.js
+++ b/src/gameobjects/shader/Shader.js
@@ -454,6 +454,20 @@ var Shader = new Class({
             }
         }
 
+        //  And now render at least once, so our texture isn't blank on the first update
+
+        if (this.shader)
+        {
+            var pipeline = renderer.currentPipeline;
+
+            renderer.clearPipeline();
+        
+            this.load();
+            this.flush();
+    
+            renderer.rebindPipeline(pipeline);
+        }
+    
         return this;
     },