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Add rectangles optimization to Spray brush

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kangax 2013-09-28 23:47:37 +02:00
parent 4b78a2d819
commit f5775eb2f4
1 changed files with 32 additions and 1 deletions
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33
src/brushes/spray_brush.class.js
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@ -37,7 +37,14 @@ fabric.SprayBrush = fabric.util.createClass( fabric.BaseBrush, /** @lends fabric
* @type Boolean
* @default
*/
randomOpacity: false,
randomOpacity: false,
/**
* Whether overlapping dots (rectangles) should be removed (for performance reasons)
* @type Boolean
* @default
*/
optimizeOverlapping: true,
/**
* Constructor
@ -97,6 +104,11 @@ fabric.SprayBrush = fabric.util.createClass( fabric.BaseBrush, /** @lends fabric
rects.push(rect);
}
}
if (this.optimizeOverlapping) {
rects = this._getOptimizedRects(rects);
}
var group = new fabric.Group(rects);
this.canvas.add(group);
this.canvas.fire('path:created', { path: group });
@ -107,6 +119,25 @@ fabric.SprayBrush = fabric.util.createClass( fabric.BaseBrush, /** @lends fabric
this.canvas.renderAll();
},
_getOptimizedRects: function(rects) {
// avoid creating duplicate rects at the same coordinates
var uniqueRects = { }, key;
for (var i = 0, len = rects.length; i < len; i++) {
key = rects[i].left + '' + rects[i].top;
if (!uniqueRects[key]) {
uniqueRects[key] = rects[i];
}
}
var uniqueRectsArray = [ ];
for (key in uniqueRects) {
uniqueRectsArray.push(uniqueRects[key]);
}
return uniqueRectsArray;
},
/**
* Renders brush
*/