Enable request animationFrame for mouse interaction

src/brushes/circle_brush.class.js

@@ -92,7 +92,7 @@ fabric.CircleBrush = fabric.util.createClass(fabric.BaseBrush, /** @lends fabric
     this.canvas.clearContext(this.canvas.contextTop);
     this._resetShadow();
     this.canvas.renderOnAddRemove = originalRenderOnAddRemove;
-    this.canvas.renderAll();
+    this.canvas.requestRenderAll();
   },
 
   /**

src/brushes/pencil_brush.class.js

@@ -197,7 +197,7 @@
         // rendered inconsistently across browsers
         // Firefox 4, for example, renders a dot,
         // whereas Chrome 10 renders nothing
-        this.canvas.renderAll();
+        this.canvas.requestRenderAll();
         return;
       }
 
@@ -208,7 +208,7 @@
 
       this.canvas.clearContext(this.canvas.contextTop);
       this._resetShadow();
-      this.canvas.renderAll();
+      this.canvas.requestRenderAll();
 
       // fire event 'path' created
       this.canvas.fire('path:created', { path: path });

src/brushes/spray_brush.class.js

@@ -120,7 +120,7 @@ fabric.SprayBrush = fabric.util.createClass( fabric.BaseBrush, /** @lends fabric
     this.canvas.clearContext(this.canvas.contextTop);
     this._resetShadow();
     this.canvas.renderOnAddRemove = originalRenderOnAddRemove;
-    this.canvas.renderAll();
+    this.canvas.requestRenderAll();
   },
 
   /**

src/canvas.class.js

@@ -45,7 +45,7 @@
      */
     initialize: function(el, options) {
       options || (options = { });
-
+      this.renderAndResetBound = this.renderAndReset.bind(this);
       this._initStatic(el, options);
       this._initInteractive();
       this._createCacheCanvas();
@@ -1396,7 +1396,7 @@
       this._setActiveObject(object);
       this.fire('object:selected', { target: object, e: e });
       object.fire('selected', { e: e });
-      this.renderAll();
+      this.requestRenderAll();
       return this;
     },
 

src/mixins/animation.mixin.js

@@ -30,7 +30,7 @@ fabric.util.object.extend(fabric.StaticCanvas.prototype, /** @lends fabric.Stati
       duration: this.FX_DURATION,
       onChange: function(value) {
         object.set('left', value);
-        _this.renderAll();
+        _this.requestRenderAll();
         onChange();
       },
       onComplete: function() {
@@ -65,7 +65,7 @@ fabric.util.object.extend(fabric.StaticCanvas.prototype, /** @lends fabric.Stati
       duration: this.FX_DURATION,
       onChange: function(value) {
         object.set('top', value);
-        _this.renderAll();
+        _this.requestRenderAll();
         onChange();
       },
       onComplete: function() {
@@ -103,7 +103,7 @@ fabric.util.object.extend(fabric.StaticCanvas.prototype, /** @lends fabric.Stati
       },
       onChange: function(value) {
         object.set('opacity', value);
-        _this.renderAll();
+        _this.requestRenderAll();
         onChange();
       },
       onComplete: function () {

src/mixins/canvas_events.mixin.js

@@ -368,7 +368,7 @@
       this._setCursorFromEvent(e, target);
       this._handleEvent(e, 'up', target ? target : null, LEFT_CLICK, isClick);
       target && (target.__corner = 0);
-      shouldRender && this.renderAll();
+      shouldRender && this.requestRenderAll();
     },
 
     /**
@@ -447,7 +447,7 @@
      */
     _onMouseDownInDrawingMode: function(e) {
       this._isCurrentlyDrawing = true;
-      this.discardActiveObject(e).renderAll();
+      this.discardActiveObject(e).requestRenderAll();
       if (this.clipTo) {
         fabric.util.clipContext(this, this.contextTop);
       }
@@ -559,7 +559,7 @@
       }
       this._handleEvent(e, 'down', target ? target : null);
       // we must renderAll so that we update the visuals
-      shouldRender && this.renderAll();
+      shouldRender && this.requestRenderAll();
     },
 
     /**
@@ -681,7 +681,7 @@
       this._beforeScaleTransform(e, transform);
       this._performTransformAction(e, transform, pointer);
 
-      transform.actionPerformed && this.renderAll();
+      transform.actionPerformed && this.requestRenderAll();
     },
 
     /**

src/mixins/canvas_gestures.mixin.js

@@ -64,7 +64,7 @@
 
       this._setCenterToOrigin(t.target);
 
-      this.renderAll();
+      this.requestRenderAll();
       t.action = 'drag';
     },
 

src/mixins/canvas_grouping.mixin.js

@@ -123,7 +123,7 @@
         group.addWithUpdate();
         this.setActiveGroup(group, e);
         this.fire('selection:created', { target: group, e: e });
-        this.renderAll();
+        this.requestRenderAll();
       }
     },
 

src/mixins/itext_behavior.mixin.js

@@ -347,7 +347,7 @@
       }
       this.canvas.fire('text:editing:entered', { target: this });
       this.initMouseMoveHandler();
-      this.canvas.renderAll();
+      this.canvas.requestRenderAll();
       return this;
     },
 

src/mixins/itext_key_behavior.mixin.js

@@ -93,7 +93,7 @@ fabric.util.object.extend(fabric.IText.prototype, /** @lends fabric.IText.protot
       this.renderCursorOrSelection();
     }
     else {
-      this.canvas && this.canvas.renderAll();
+      this.canvas && this.canvas.requestRenderAll();
     }
   },
 
@@ -116,7 +116,7 @@ fabric.util.object.extend(fabric.IText.prototype, /** @lends fabric.IText.protot
     }
     e.stopImmediatePropagation();
     e.preventDefault();
-    this.canvas && this.canvas.renderAll();
+    this.canvas && this.canvas.requestRenderAll();
   },
 
   /**
@@ -143,7 +143,7 @@ fabric.util.object.extend(fabric.IText.prototype, /** @lends fabric.IText.protot
       this.fire('changed');
       if (this.canvas) {
         this.canvas.fire('text:changed', { target: this });
-        this.canvas.renderAll();
+        this.canvas.requestRenderAll();
       }
     }
 
@@ -184,7 +184,7 @@ fabric.util.object.extend(fabric.IText.prototype, /** @lends fabric.IText.protot
     this.fire('changed');
     if (this.canvas) {
       this.canvas.fire('text:changed', { target: this });
-      this.canvas.renderAll();
+      this.canvas.requestRenderAll();
     }
   },
   /**
@@ -592,7 +592,7 @@ fabric.util.object.extend(fabric.IText.prototype, /** @lends fabric.IText.protot
 
     this._removeExtraneousStyles();
 
-    this.canvas && this.canvas.renderAll();
+    this.canvas && this.canvas.requestRenderAll();
 
     this.setCoords();
     this.fire('changed');

src/static_canvas.class.js

@@ -40,7 +40,7 @@
      */
     initialize: function(el, options) {
       options || (options = { });
-
+      this.renderAndResetBound = this.renderAndReset.bind(this);
       this._initStatic(el, options);
     },
 
@@ -818,6 +818,31 @@
       return this;
     },
 
+    /**
+     * Function created to be instance bound at initialization
+     * used in requestAnimationFrame rendering
+     * @return {fabric.Canvas} instance
+     * @chainable
+     */
+    renderAndReset: function() {
+      this.renderAll();
+      this.isRendering = false;
+    },
+
+    /**
+     * Append a renderAll request to next animation frame.
+     * a boolean flag will avoid appending more.
+     * @return {fabric.Canvas} instance
+     * @chainable
+     */
+    requestRenderAll: function () {
+      if (!this.isRendering) {
+        this.isRendering = true;
+        fabric.util.requestAnimFrame(this.renderAndResetBound);
+      }
+      return this;
+    },
+
     /**
      * Calculate the position of the 4 corner of canvas with current viewportTransform.
      * helps to determinate when an object is in the current rendering viewport using
@@ -1424,7 +1449,8 @@
         removeFromArray(this._objects, object);
         this._objects.unshift(object);
       }
-      return this.renderAll && this.renderAll();
+      this.renderAll && this.renderAll();
+      return this;
     },
 
     /**
@@ -1452,7 +1478,8 @@
         removeFromArray(this._objects, object);
         this._objects.push(object);
       }
-      return this.renderAll && this.renderAll();
+      this.renderAll && this.renderAll();
+      return this;
     },
 
     /**