#

API Docs for: 1.6.0
Show: Inherited Protected Private Deprecated

# File: src/pixi/extras/TilingSprite.js

    /**
     * @author Mat Groves http://matgroves.com/
     */

    /**
     * A tiling sprite is a fast way of rendering a tiling image
     *
     * @class TilingSprite
     * @extends Sprite
     * @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);

        /**
         * The with of the tiling sprite
         *
         * @property width
         * @type Number
         */
        this.width = width || 100;

        /**
         * The height of the tiling sprite
         *
         * @property height
         * @type Number
         */
        this.height = height || 100;

        /**
         * The scaling of the image that is being tiled
         *
         * @property tileScale
         * @type Point
         */
        this.tileScale = new PIXI.Point(1,1);

        /**
         * A point that represents the scale of the texture object
         *
         * @property tileScaleOffset
         * @type Point
         */
        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);

        /**
         * Whether this sprite is renderable or not
         *
         * @property renderable
         * @type Boolean
         * @default true
         */
        this.renderable = true;

        /**
         * The tint applied to the sprite. This is a hex value
         *
         * @property tint
         * @type Number
         * @default 0xFFFFFF
         */
        this.tint = 0xFFFFFF;

        /**
         * The blend mode to be applied to the sprite
         *
         * @property blendMode
         * @type Number
         * @default PIXI.blendModes.NORMAL;
         */
        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, 'width', {
        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, 'height', {
        get: function() {
            return  this._height;
        },
        set: function(value) {
            this._height = value;
        }
    });

    PIXI.TilingSprite.prototype.setTexture = function(texture)
    {
        if (this.texture === texture) return;

        this.texture = texture;

        this.refreshTexture = true;

        this.cachedTint = 0xFFFFFF;
    };

    /**
    * Renders the object using the WebGL renderer
    *
    * @method _renderWebGL
    * @param renderSession {RenderSession}
    * @private
    */
    PIXI.TilingSprite.prototype._renderWebGL = function(renderSession)
    {
        if (this.visible === false || this.alpha === 0) return;

        var i,j;

        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.refreshTexture)
        {
            this.generateTilingTexture(true);

            if (this.tilingTexture && this.tilingTexture.needsUpdate)
            {
                //TODO - tweaking
                PIXI.updateWebGLTexture(this.tilingTexture.baseTexture, renderSession.gl);
                this.tilingTexture.needsUpdate = false;
               // this.tilingTexture._uvs = null;
            }
        }
        else
        {
            renderSession.spriteBatch.renderTilingSprite(this);
        }

        // simple render children!
        for (i=0,j=this.children.length; i<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();
    };

    /**
    * Renders the object using the Canvas renderer
    *
    * @method _renderCanvas
    * @param renderSession {RenderSession}
    * @private
    */
    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;

        var i,j;

        context.setTransform(transform.a, transform.c, transform.b, transform.d, transform.tx , transform.ty);

        if (!this.__tilePattern ||  this.refreshTexture)
        {
            this.generateTilingTexture(false);

            if (this.tilingTexture)
            {
                this.__tilePattern = context.createPattern(this.tilingTexture.baseTexture.source, 'repeat');
            }
            else
            {
                return;
            }
        }

        // check blend mode
        if (this.blendMode !== renderSession.currentBlendMode)
        {
            renderSession.currentBlendMode = this.blendMode;
            context.globalCompositeOperation = PIXI.blendModesCanvas[renderSession.currentBlendMode];
        }

        var tilePosition = this.tilePosition;
        var tileScale = this.tileScale;

        tilePosition.x %= this.tilingTexture.baseTexture.width;
        tilePosition.y %= this.tilingTexture.baseTexture.height;

        // offset
        context.scale(tileScale.x,tileScale.y);
        context.translate(tilePosition.x, tilePosition.y);

        context.fillStyle = this.__tilePattern;

        // make sure to account for the anchor point..
        context.fillRect(-tilePosition.x + (this.anchor.x * -this._width),
                        -tilePosition.y + (this.anchor.y * -this._height),
                        this._width / tileScale.x,
                        this._height / tileScale.y);

        context.scale(1 / tileScale.x, 1 / tileScale.y);
        context.translate(-tilePosition.x, -tilePosition.y);

        if (this._mask)
        {
            renderSession.maskManager.popMask(renderSession.context);
        }

        for (i=0,j=this.children.length; i<j; i++)
        {
            this.children[i]._renderCanvas(renderSession);
        }
    };

    /**
    * Returns the framing rectangle of the sprite as a PIXI.Rectangle object
    *
    * @method getBounds
    * @return {Rectangle} the framing rectangle
    */
    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.a;
        var b = worldTransform.c;
        var c = worldTransform.b;
        var d = worldTransform.d;
        var tx = worldTransform.tx;
        var ty = worldTransform.ty;

        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 < minX ? x1 : minX;
        minX = x2 < minX ? x2 : minX;
        minX = x3 < minX ? x3 : minX;
        minX = x4 < minX ? x4 : minX;

        minY = y1 < minY ? y1 : minY;
        minY = y2 < minY ? y2 : minY;
        minY = y3 < minY ? y3 : minY;
        minY = y4 < minY ? y4 : minY;

        maxX = x1 > maxX ? x1 : maxX;
        maxX = x2 > maxX ? x2 : maxX;
        maxX = x3 > maxX ? x3 : maxX;
        maxX = x4 > maxX ? x4 : maxX;

        maxY = y1 > maxY ? y1 : maxY;
        maxY = y2 > maxY ? y2 : maxY;
        maxY = y3 > maxY ? y3 : maxY;
        maxY = y4 > 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;
    };

    /**
    *
    * @method generateTilingTexture
    *
    * @param forcePowerOfTwo {Boolean} Whether we want to force the texture to be a power of two
    */
    PIXI.TilingSprite.prototype.generateTilingTexture = function(forcePowerOfTwo)
    {
        if (!this.texture.baseTexture.hasLoaded) return;

        var texture = this.texture;
        var frame = texture.frame;
        var targetWidth, targetHeight;

        //  Check that the frame is the same size as the base texture.
        var isFrame = frame.width !== texture.baseTexture.width || frame.height !== texture.baseTexture.height;

        var newTextureRequired = false;

        if (!forcePowerOfTwo)
        {
            if (isFrame)
            {
                targetWidth = frame.width;
                targetHeight = frame.height;

                newTextureRequired = true;
            }
        }
        else
        {
            targetWidth = PIXI.getNextPowerOfTwo(frame.width);
            targetHeight = PIXI.getNextPowerOfTwo(frame.height);

            if (frame.width !== targetWidth || frame.height !== targetHeight) newTextureRequired = true;
        }

        if (newTextureRequired)
        {
            var canvasBuffer;

            if (this.tilingTexture && this.tilingTexture.isTiling)
            {
                canvasBuffer = this.tilingTexture.canvasBuffer;
                canvasBuffer.resize(targetWidth, targetHeight);
                this.tilingTexture.baseTexture.width = targetWidth;
                this.tilingTexture.baseTexture.height = targetHeight;
                this.tilingTexture.needsUpdate = true;
            }
            else
            {
                canvasBuffer = new PIXI.CanvasBuffer(targetWidth, targetHeight);

                this.tilingTexture = PIXI.Texture.fromCanvas(canvasBuffer.canvas);
                this.tilingTexture.canvasBuffer = canvasBuffer;
                this.tilingTexture.isTiling = true;
            }

            canvasBuffer.context.drawImage(texture.baseTexture.source,
                                   texture.crop.x,
                                   texture.crop.y,
                                   texture.crop.width,
                                   texture.crop.height,
                                   0,
                                   0,
                                   targetWidth,
                                   targetHeight);

            this.tileScaleOffset.x = frame.width / targetWidth;
            this.tileScaleOffset.y = frame.height / targetHeight;
        }
        else
        {
            //  TODO - switching?
            if (this.tilingTexture && this.tilingTexture.isTiling)
            {
                // destroy the tiling texture!
                // TODO could store this somewhere?
                this.tilingTexture.destroy(true);
            }

            this.tileScaleOffset.x = 1;
            this.tileScaleOffset.y = 1;
            this.tilingTexture = texture;
        }

        this.refreshTexture = false;
        this.tilingTexture.baseTexture._powerOf2 = true;
    };