Improve WebGL Rendering performance

Author: pandamicro

Diff for: cocos2d/core/renderer/RendererWebGL.js

@@ -273,9 +273,10 @@ return {
         }
 
         // Check batching
-        var texture = cmd._node._texture;
-        var blendSrc = cmd._node._blendFunc.src;
-        var blendDst = cmd._node._blendFunc.dst;
+        var node = cmd._node;
+        var texture = node._texture;
+        var blendSrc = node._blendFunc.src;
+        var blendDst = node._blendFunc.dst;
         var shader = cmd._shaderProgram;
         if (_batchedInfo.texture !== texture ||
             _batchedInfo.blendSrc !== blendSrc ||
@@ -369,4 +370,4 @@ return {
         _batchedInfo.texture = null;
     }
 };
-})();
+})();

Diff for: cocos2d/core/sprites/CCSpriteWebGLRenderCmd.js

@@ -272,17 +272,20 @@
         var node = this._node,
             lx = node._offsetPosition.x, rx = lx + node._rect.width,
             by = node._offsetPosition.y, ty = by + node._rect.height,
-            wt = this._worldTransform;
+            wt = this._worldTransform, 
+            wtx = wt.tx, wty = wt.ty,
+            lxa = lx * wt.a, lxb = lx * wt.b, rxa = rx * wt.a, rxb = rx * wt.b,
+            tyc = ty * wt.c, tyd = ty * wt.d, byc = by * wt.c, byd = by * wt.d;
 
         var vertices = this._vertices;
-        vertices[0].x = lx * wt.a + ty * wt.c + wt.tx; // tl
-        vertices[0].y = lx * wt.b + ty * wt.d + wt.ty;
-        vertices[1].x = lx * wt.a + by * wt.c + wt.tx; // bl
-        vertices[1].y = lx * wt.b + by * wt.d + wt.ty;
-        vertices[2].x = rx * wt.a + ty * wt.c + wt.tx; // tr
-        vertices[2].y = rx * wt.b + ty * wt.d + wt.ty;
-        vertices[3].x = rx * wt.a + by * wt.c + wt.tx; // br
-        vertices[3].y = rx * wt.b + by * wt.d + wt.ty;
+        vertices[0].x = lxa + tyc + wtx; // tl
+        vertices[0].y = lxb + tyd + wty;
+        vertices[1].x = lxa + byc + wtx; // bl
+        vertices[1].y = lxb + byd + wty;
+        vertices[2].x = rxa + tyc + wtx; // tr
+        vertices[2].y = rxb + tyd + wty;
+        vertices[3].x = rxa + byc + wtx; // br
+        vertices[3].y = rxb + byd + wty;
     };
 
     proto.needDraw = function () {
@@ -324,4 +327,4 @@
 
         return len;
     };
-})();
+})();