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Reusing children and use pool object.

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When need update BitmapText very often it is not the best way  to create new Sprites and remove old.
So better way is reusing it and use pool object.
This commit is contained in:
Oleg Kuzyk 2014-02-03 15:04:02 +02:00
parent 97b27944e1
commit e66609d953
1 changed files with 20 additions and 8 deletions
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28
src/pixi/text/BitmapText.js
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@ -20,6 +20,8 @@ PIXI.BitmapText = function(text, style)
{
PIXI.DisplayObjectContainer.call(this);
this._pool = [];
this.setText(text);
this.setStyle(style);
this.updateText();
@ -125,13 +127,28 @@ PIXI.BitmapText.prototype.updateText = function()
lineAlignOffsets.push(alignOffset);
}
for(i = 0; i < chars.length; i++)
var lenChildren = this.children.length;
var lenChars = chars.length;
for(i = 0; i < lenChars; i++)
{
var c = new PIXI.Sprite(chars[i].texture); //PIXI.Sprite.fromFrame(chars[i].charCode);
var c = i < lenChildren ? this.children[i] : this._pool.pop(); // get old child if have. if not - take from pool.
if (c) c.setTexture(chars[i].texture); // check if got one before.
else c = new PIXI.Sprite(chars[i].texture); // if no create new one.
c.position.x = (chars[i].position.x + lineAlignOffsets[chars[i].line]) * scale;
c.position.y = chars[i].position.y * scale;
c.scale.x = c.scale.y = scale;
this.addChild(c);
if (!c.parent) this.addChild(c);
}
// remove unnecessary children.
// and put their into the pool.
while(this.children.length > lenChars)
{
var child = this.getChildAt(this.children.length - 1);
this._pool.push(child);
this.removeChild(child);
}
this.width = maxLineWidth * scale;
@ -148,12 +165,7 @@ PIXI.BitmapText.prototype.updateTransform = function()
{
if(this.dirty)
{
while(this.children.length > 0)
{
this.removeChild(this.getChildAt(0));
}
this.updateText();
this.dirty = false;
}