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pixi.js/docs/files/src_pixi_extras_TilingSprite.js.html
Mat Groves 847eb6c48e Docs updated 
Fixed issue where alpha not being set correctly in canvas spriteBatch
Fixed issue where previous stage events did not get removed correctly
2014-01-28 00:08:50 +00:00

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<h1 class="file-heading">File: src/pixi/extras/TilingSprite.js</h1>
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<pre class="code prettyprint linenums">
/**
* @author Mat Groves http://matgroves.com/
*/
/**
* A tiling sprite is a fast way of rendering a tiling image
*
* @class TilingSprite
* @extends DisplayObjectContainer
* @constructor
* @param texture {Texture} the texture of the tiling sprite
* @param width {Number} the width of the tiling sprite
* @param height {Number} the height of the tiling sprite
*/
PIXI.TilingSprite = function(texture, width, height)
{
PIXI.Sprite.call( this, texture);
this.width = width || 100;
this.height = height || 100;
/**
* The scaling of the image that is being tiled
*
* @property tileScale
* @type Point
*/
this.tileScale = new PIXI.Point(1,1);
this.tileScaleOffset = new PIXI.Point(1,1);
/**
* The offset position of the image that is being tiled
*
* @property tilePosition
* @type Point
*/
this.tilePosition = new PIXI.Point(0,0);
this.renderable = true;
this.tint = 0xFFFFFF;
this.blendMode = PIXI.blendModes.NORMAL;
};
// constructor
PIXI.TilingSprite.prototype = Object.create( PIXI.Sprite.prototype );
PIXI.TilingSprite.prototype.constructor = PIXI.TilingSprite;
/**
* The width of the sprite, setting this will actually modify the scale to achieve the value set
*
* @property width
* @type Number
*/
Object.defineProperty(PIXI.TilingSprite.prototype, &#x27;width&#x27;, {
get: function() {
return this._width;
},
set: function(value) {
this._width = value;
}
});
/**
* The height of the TilingSprite, setting this will actually modify the scale to achieve the value set
*
* @property height
* @type Number
*/
Object.defineProperty(PIXI.TilingSprite.prototype, &#x27;height&#x27;, {
get: function() {
return this._height;
},
set: function(value) {
this._height = value;
}
});
PIXI.TilingSprite.prototype.onTextureUpdate = function()
{
// so if _width is 0 then width was not set..
//console.log(&quot;HI MUM&quot;)
this.updateFrame = true;
};
PIXI.TilingSprite.prototype._renderWebGL = function(renderSession)
{
if(this.visible === false || this.alpha === 0)return;
var i,j;
if(this.mask || this.filters)
{
if(this.mask)
{
renderSession.spriteBatch.stop();
renderSession.maskManager.pushMask(this.mask, renderSession);
renderSession.spriteBatch.start();
}
if(this.filters)
{
renderSession.spriteBatch.flush();
renderSession.filterManager.pushFilter(this._filterBlock);
}
if(!this.tilingTexture)this.generateTilingTexture(true);
else renderSession.spriteBatch.renderTilingSprite(this);
// simple render children!
for(i=0,j=this.children.length; i&lt;j; i++)
{
this.children[i]._renderWebGL(renderSession);
}
renderSession.spriteBatch.stop();
if(this.filters)renderSession.filterManager.popFilter();
if(this.mask)renderSession.maskManager.popMask(renderSession);
renderSession.spriteBatch.start();
}
else
{
if(!this.tilingTexture)this.generateTilingTexture(true);
else renderSession.spriteBatch.renderTilingSprite(this);
// simple render children!
for(i=0,j=this.children.length; i&lt;j; i++)
{
this.children[i]._renderWebGL(renderSession);
}
}
};
PIXI.TilingSprite.prototype._renderCanvas = function(renderSession)
{
if(this.visible === false || this.alpha === 0)return;
var context = renderSession.context;
if(this._mask)
{
renderSession.maskManager.pushMask(this._mask, context);
}
context.globalAlpha = this.worldAlpha;
var transform = this.worldTransform;
// allow for trimming
context.setTransform(transform[0], transform[3], transform[1], transform[4], transform[2], transform[5]);
if(!this.__tilePattern)
{
this.generateTilingTexture(false);
if(this.tilingTexture)
{
this.__tilePattern = context.createPattern(this.tilingTexture.baseTexture.source, &#x27;repeat&#x27;);
}
}
// check blend mode
if(this.blendMode !== renderSession.currentBlendMode)
{
renderSession.currentBlendMode = this.blendMode;
context.globalCompositeOperation = PIXI.blendModesCanvas[renderSession.currentBlendMode];
}
context.beginPath();
var tilePosition = this.tilePosition;
var tileScale = this.tileScale;
// console.log(tileScale.x)
// offset
context.scale(tileScale.x,tileScale.y);
context.translate(tilePosition.x, tilePosition.y);
context.fillStyle = this.__tilePattern;
context.fillRect(-tilePosition.x,-tilePosition.y,this.width / tileScale.x, this.height / tileScale.y);
context.scale(1/tileScale.x, 1/tileScale.y);
context.translate(-tilePosition.x, -tilePosition.y);
context.closePath();
if(this._mask)
{
renderSession.maskManager.popMask(renderSession.context);
}
};
PIXI.TilingSprite.prototype.getBounds = function()
{
var width = this._width;
var height = this._height;
var w0 = width * (1-this.anchor.x);
var w1 = width * -this.anchor.x;
var h0 = height * (1-this.anchor.y);
var h1 = height * -this.anchor.y;
var worldTransform = this.worldTransform;
var a = worldTransform[0];
var b = worldTransform[3];
var c = worldTransform[1];
var d = worldTransform[4];
var tx = worldTransform[2];
var ty = worldTransform[5];
var x1 = a * w1 + c * h1 + tx;
var y1 = d * h1 + b * w1 + ty;
var x2 = a * w0 + c * h1 + tx;
var y2 = d * h1 + b * w0 + ty;
var x3 = a * w0 + c * h0 + tx;
var y3 = d * h0 + b * w0 + ty;
var x4 = a * w1 + c * h0 + tx;
var y4 = d * h0 + b * w1 + ty;
var maxX = -Infinity;
var maxY = -Infinity;
var minX = Infinity;
var minY = Infinity;
minX = x1 &lt; minX ? x1 : minX;
minX = x2 &lt; minX ? x2 : minX;
minX = x3 &lt; minX ? x3 : minX;
minX = x4 &lt; minX ? x4 : minX;
minY = y1 &lt; minY ? y1 : minY;
minY = y2 &lt; minY ? y2 : minY;
minY = y3 &lt; minY ? y3 : minY;
minY = y4 &lt; minY ? y4 : minY;
maxX = x1 &gt; maxX ? x1 : maxX;
maxX = x2 &gt; maxX ? x2 : maxX;
maxX = x3 &gt; maxX ? x3 : maxX;
maxX = x4 &gt; maxX ? x4 : maxX;
maxY = y1 &gt; maxY ? y1 : maxY;
maxY = y2 &gt; maxY ? y2 : maxY;
maxY = y3 &gt; maxY ? y3 : maxY;
maxY = y4 &gt; maxY ? y4 : maxY;
var bounds = this._bounds;
bounds.x = minX;
bounds.width = maxX - minX;
bounds.y = minY;
bounds.height = maxY - minY;
// store a reference so that if this function gets called again in the render cycle we do not have to recalculate
this._currentBounds = bounds;
return bounds;
};
PIXI.TilingSprite.prototype.generateTilingTexture = function(forcePowerOfTwo)
{
var texture = this.texture;
if(!texture.baseTexture.hasLoaded)return;
var baseTexture = texture.baseTexture;
var frame = texture.frame;
var targetWidth, targetHeight;
// check that the frame is the same size as the base texture.
var isFrame = frame.width !== baseTexture.width || frame.height !== baseTexture.height;
this.tilingTexture = texture;
var newTextureRequired = false;
if(!forcePowerOfTwo)
{
if(isFrame)
{
targetWidth = frame.width;
targetHeight = frame.height;
newTextureRequired = true;
}
}
else
{
targetWidth = PIXI.getNextPowerOfTwo(texture.frame.width);
targetHeight = PIXI.getNextPowerOfTwo(texture.frame.height);
if(frame.width !== targetWidth &amp;&amp; frame.height !== targetHeight)newTextureRequired = true;
}
if(newTextureRequired)
{
var canvasBuffer = new PIXI.CanvasBuffer(targetWidth, targetHeight);
canvasBuffer.context.drawImage(texture.baseTexture.source,
frame.x,
frame.y,
frame.width,
frame.height,
0,
0,
targetWidth,
targetHeight);
this.tilingTexture = PIXI.Texture.fromCanvas(canvasBuffer.canvas);
this.tileScaleOffset.x = frame.width / targetWidth;
this.tileScaleOffset.y = frame.height / targetHeight;
}
this.tilingTexture.baseTexture._powerOf2 = true;
};
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