From 192a3052f6a5f430eb2f2a09554f44171b002ef5 Mon Sep 17 00:00:00 2001
From: giuseppelt <giuseppelt@users.noreply.github.com>
Date: Fri, 19 May 2017 01:13:10 +0200
Subject: [PATCH] ParticleSystem: Mark as ChangeColor only if needed

This avoid a waste of resources (particle image redraw), if the delta is only the alpha, which is handled by the context's globalAlpha
---
 cocos2d/particle/CCParticleSystemCanvasRenderCmd.js | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/cocos2d/particle/CCParticleSystemCanvasRenderCmd.js b/cocos2d/particle/CCParticleSystemCanvasRenderCmd.js
index 781baf7004..5f602e99f2 100644
--- a/cocos2d/particle/CCParticleSystemCanvasRenderCmd.js
+++ b/cocos2d/particle/CCParticleSystemCanvasRenderCmd.js
@@ -195,11 +195,12 @@
     };
     proto._updateDeltaColor = function (selParticle, dt) {
         if (!this._node._dontTint) {
-            selParticle.color.r += selParticle.deltaColor.r * dt;
-            selParticle.color.g += selParticle.deltaColor.g * dt;
-            selParticle.color.b += selParticle.deltaColor.b * dt;
-            selParticle.color.a += selParticle.deltaColor.a * dt;
-            selParticle.isChangeColor = true;
+            var deltaColor = selParticle.deltaColor;
+            selParticle.color.r += deltaColor.r * dt;
+            selParticle.color.g += deltaColor.g * dt;
+            selParticle.color.b += deltaColor.b * dt;
+            selParticle.color.a += deltaColor.a * dt;
+            selParticle.isChangeColor = deltaColor.r !== 0 || deltaColor.g !== 0 || deltaColor.b !== 0;
         }
     };
 })();