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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>Phaser Source: gameobjects/Image.js</title>
<!--[if lt IE 9]>
<script src="//html5shiv.googlecode.com/svn/trunk/html5.js"></script>
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<h1 class="page-title">Source: gameobjects/Image.js</h1>
<section>
<article>
<pre class="sunlight-highlight-javascript linenums">/**
* @author Richard Davey <rich@photonstorm.com>
* @copyright 2014 Photon Storm Ltd.
* @license {@link https://github.com/photonstorm/phaser/blob/master/license.txt|MIT License}
*/
/**
* An Image is a light-weight object you can use to display anything that doesn't need physics or animation.
* It can still rotate, scale, crop and receive input events. This makes it perfect for logos, backgrounds, simple buttons and other non-Sprite graphics.
*
* @class Phaser.Image
* @extends PIXI.Sprite
* @constructor
* @param {Phaser.Game} game - A reference to the currently running game.
* @param {number} x - The x coordinate of the Image. The coordinate is relative to any parent container this Image may be in.
* @param {number} y - The y coordinate of the Image. The coordinate is relative to any parent container this Image may be in.
* @param {string|Phaser.RenderTexture|Phaser.BitmapData|PIXI.Texture} key - The texture used by the Image during rendering. It can be a string which is a reference to the Cache entry, or an instance of a RenderTexture, BitmapData or PIXI.Texture.
* @param {string|number} frame - If this Image is using part of a sprite sheet or texture atlas you can specify the exact frame to use by giving a string or numeric index.
*/
Phaser.Image = function (game, x, y, key, frame) {
x = x || 0;
y = y || 0;
key = key || null;
frame = frame || null;
/**
* @property {Phaser.Game} game - A reference to the currently running Game.
*/
this.game = game;
/**
* @property {boolean} exists - If exists = false then the Image isn't updated by the core game loop.
* @default
*/
this.exists = true;
/**
* @property {string} name - The user defined name given to this Image.
* @default
*/
this.name = '';
/**
* @property {number} type - The const type of this object.
* @readonly
*/
this.type = Phaser.IMAGE;
/**
* @property {number} z - The z-depth value of this object within its Group (remember the World is a Group as well). No two objects in a Group can have the same z value.
*/
this.z = 0;
/**
* @property {Phaser.Events} events - The Events you can subscribe to that are dispatched when certain things happen on this Image or its components.
*/
this.events = new Phaser.Events(this);
/**
* @property {Phaser.AnimationManager} animations - This manages animations of the sprite. You can modify animations through it (see Phaser.AnimationManager)
*/
this.animations = new Phaser.AnimationManager(this);
/**
* @property {string|Phaser.RenderTexture|Phaser.BitmapData|PIXI.Texture} key - This is the image or texture used by the Image during rendering. It can be a string which is a reference to the Cache entry, or an instance of a RenderTexture, BitmapData or PIXI.Texture.
*/
this.key = key;
PIXI.Sprite.call(this, PIXI.TextureCache['__default']);
this.position.set(x, y);
/**
* @property {Phaser.Point} world - The world coordinates of this Image. This differs from the x/y coordinates which are relative to the Images container.
*/
this.world = new Phaser.Point(x, y);
/**
* @property {boolean} alive - A useful boolean to control if the Image is alive or dead (in terms of your gameplay, it doesn't effect rendering).
* @default
*/
this.alive = true;
/**
* Should this Image be automatically culled if out of range of the camera?
* A culled sprite has its renderable property set to 'false'.
* Be advised this is quite an expensive operation, as it has to calculate the bounds of the object every frame, so only enable it if you really need it.
*
* @property {boolean} autoCull - A flag indicating if the Image should be automatically camera culled or not.
* @default
*/
this.autoCull = false;
/**
* @property {Phaser.InputHandler|null} input - The Input Handler for this object. Needs to be enabled with image.inputEnabled = true before you can use it.
*/
this.input = null;
/**
* @property {boolean} debug - Handy flag to use with Game.enableStep
* @default
*/
this.debug = false;
/**
* @property {Phaser.Point} cameraOffset - If this object is fixedToCamera then this stores the x/y offset that its drawn at, from the top-left of the camera view.
*/
this.cameraOffset = new Phaser.Point();
/**
* @property {Phaser.Rectangle} cropRect - The Rectangle used to crop the texture. Set this via Sprite.crop. Any time you modify this property directly you must call Sprite.updateCrop.
* @default
*/
this.cropRect = null;
/**
* A small internal cache:
* 0 = previous position.x
* 1 = previous position.y
* 2 = previous rotation
* 3 = renderID
* 4 = fresh? (0 = no, 1 = yes)
* 5 = outOfBoundsFired (0 = no, 1 = yes)
* 6 = exists (0 = no, 1 = yes)
* 7 = fixed to camera (0 = no, 1 = yes)
* 8 = destroy phase? (0 = no, 1 = yes)
* @property {Array} _cache
* @private
*/
this._cache = [ 0, 0, 0, 0, 1, 0, 1, 0, 0 ];
/**
* @property {Phaser.Rectangle} _crop - Internal cache var.
* @private
*/
this._crop = null;
/**
* @property {Phaser.Rectangle} _frame - Internal cache var.
* @private
*/
this._frame = null;
/**
* @property {Phaser.Rectangle} _bounds - Internal cache var.
* @private
*/
this._bounds = new Phaser.Rectangle();
this.loadTexture(key, frame);
};
Phaser.Image.prototype = Object.create(PIXI.Sprite.prototype);
Phaser.Image.prototype.constructor = Phaser.Image;
/**
* Automatically called by World.preUpdate.
*
* @method Phaser.Image#preUpdate
* @memberof Phaser.Image
*/
Phaser.Image.prototype.preUpdate = function() {
this._cache[0] = this.world.x;
this._cache[1] = this.world.y;
this._cache[2] = this.rotation;
if (!this.exists || !this.parent.exists)
{
this._cache[3] = -1;
return false;
}
if (this.autoCull)
{
this._bounds.copyFrom(this.getBounds());
// Won't get rendered but will still get its transform updated
this.renderable = this.game.world.camera.screenView.intersects(this._bounds);
}
this.world.setTo(this.game.camera.x + this.worldTransform.tx, this.game.camera.y + this.worldTransform.ty);
if (this.visible)
{
this._cache[3] = this.game.stage.currentRenderOrderID++;
}
// Update any Children
for (var i = 0, len = this.children.length; i < len; i++)
{
this.children[i].preUpdate();
}
return true;
};
/**
* Override and use this function in your own custom objects to handle any update requirements you may have.
*
* @method Phaser.Image#update
* @memberof Phaser.Image
*/
Phaser.Image.prototype.update = function() {
};
/**
* Internal function called by the World postUpdate cycle.
*
* @method Phaser.Image#postUpdate
* @memberof Phaser.Image
*/
Phaser.Image.prototype.postUpdate = function() {
if (this.key instanceof Phaser.BitmapData)
{
this.key.render();
}
// Fixed to Camera?
if (this._cache[7] === 1)
{
this.position.x = (this.game.camera.view.x + this.cameraOffset.x) / this.game.camera.scale.x;
this.position.y = (this.game.camera.view.y + this.cameraOffset.y) / this.game.camera.scale.y;
}
// Update any Children
for (var i = 0, len = this.children.length; i < len; i++)
{
this.children[i].postUpdate();
}
};
/**
* Changes the Texture the Image is using entirely. The old texture is removed and the new one is referenced or fetched from the Cache.
* This causes a WebGL texture update, so use sparingly or in low-intensity portions of your game.
*
* @method Phaser.Image#loadTexture
* @memberof Phaser.Image
* @param {string|Phaser.RenderTexture|Phaser.BitmapData|PIXI.Texture} key - This is the image or texture used by the Image during rendering. It can be a string which is a reference to the Cache entry, or an instance of a RenderTexture, BitmapData or PIXI.Texture.
* @param {string|number} frame - If this Image is using part of a sprite sheet or texture atlas you can specify the exact frame to use by giving a string or numeric index.
*/
Phaser.Image.prototype.loadTexture = function (key, frame) {
frame = frame || 0;
this.key = key;
var setFrame = true;
var smoothed = this.smoothed;
if (key instanceof Phaser.RenderTexture)
{
this.key = key.key;
this.setTexture(key);
}
else if (key instanceof Phaser.BitmapData)
{
// This works from a reference, which probably isn't what we need here
this.setTexture(key.texture);
if (this.game.cache.getFrameData(key.key, Phaser.Cache.BITMAPDATA))
{
setFrame = !this.animations.loadFrameData(this.game.cache.getFrameData(key.key, Phaser.Cache.BITMAPDATA), frame);
}
}
else if (key instanceof PIXI.Texture)
{
this.setTexture(key);
}
else
{
if (key === null || typeof key === 'undefined')
{
this.key = '__default';
this.setTexture(PIXI.TextureCache[this.key]);
}
else if (typeof key === 'string' && !this.game.cache.checkImageKey(key))
{
console.warn("Texture with key '" + key + "' not found.");
this.key = '__missing';
this.setTexture(PIXI.TextureCache[this.key]);
}
else
{
this.setTexture(new PIXI.Texture(PIXI.BaseTextureCache[key]));
setFrame = !this.animations.loadFrameData(this.game.cache.getFrameData(key), frame);
}
}
if (setFrame)
{
this._frame = Phaser.Rectangle.clone(this.texture.frame);
}
if (!smoothed)
{
this.smoothed = false;
}
};
/**
* Sets the Texture frame the Image uses for rendering.
* This is primarily an internal method used by Image.loadTexture, although you may call it directly.
*
* @method Phaser.Image#setFrame
* @memberof Phaser.Image
* @param {Phaser.Frame} frame - The Frame to be used by the Image texture.
*/
Phaser.Image.prototype.setFrame = function(frame) {
this._frame = frame;
this.texture.frame.x = frame.x;
this.texture.frame.y = frame.y;
this.texture.frame.width = frame.width;
this.texture.frame.height = frame.height;
this.texture.crop.x = frame.x;
this.texture.crop.y = frame.y;
this.texture.crop.width = frame.width;
this.texture.crop.height = frame.height;
if (frame.trimmed)
{
if (this.texture.trim)
{
this.texture.trim.x = frame.spriteSourceSizeX;
this.texture.trim.y = frame.spriteSourceSizeY;
this.texture.trim.width = frame.sourceSizeW;
this.texture.trim.height = frame.sourceSizeH;
}
else
{
this.texture.trim = { x: frame.spriteSourceSizeX, y: frame.spriteSourceSizeY, width: frame.sourceSizeW, height: frame.sourceSizeH };
}
this.texture.width = frame.sourceSizeW;
this.texture.height = frame.sourceSizeH;
this.texture.frame.width = frame.sourceSizeW;
this.texture.frame.height = frame.sourceSizeH;
}
else if (!frame.trimmed && this.texture.trim)
{
this.texture.trim = null;
}
if (this.cropRect)
{
this.updateCrop();
}
else
{
if (this.game.renderType === Phaser.WEBGL)
{
PIXI.WebGLRenderer.updateTextureFrame(this.texture);
}
}
};
/**
* Resets the Texture frame dimensions that the Image uses for rendering.
*
* @method Phaser.Image#resetFrame
* @memberof Phaser.Image
*/
Phaser.Image.prototype.resetFrame = function() {
if (this._frame)
{
this.setFrame(this._frame);
}
};
/**
* Crop allows you to crop the texture used to display this Image.
* Cropping takes place from the top-left of the Image and can be modified in real-time by providing an updated rectangle object.
* The rectangle object given to this method can be either a Phaser.Rectangle or any object so long as it has public x, y, width and height properties.
* Please note that the rectangle object given is not duplicated by this method, but rather the Image uses a reference to the rectangle.
* Keep this in mind if assigning a rectangle in a for-loop, or when cleaning up for garbage collection.
*
* @method Phaser.Image#crop
* @memberof Phaser.Image
* @param {Phaser.Rectangle} rect - The Rectangle used during cropping. Pass null or no parameters to clear a previously set crop rectangle.
* @param {boolean} [copy=false] - If false Sprite.cropRect will be a reference to the given rect. If true it will copy the rect values into a local Sprite.cropRect object.
*/
Phaser.Image.prototype.crop = function(rect, copy) {
if (typeof copy === 'undefined') { copy = false; }
if (rect)
{
if (copy && this.cropRect !== null)
{
this.cropRect.setTo(rect.x, rect.y, rect.width, rect.height);
}
else if (copy && this.cropRect === null)
{
this.cropRect = new Phaser.Rectangle(rect.x, rect.y, rect.width, rect.height);
}
else
{
this.cropRect = rect;
}
this.updateCrop();
}
else
{
this._crop = null;
this.cropRect = null;
this.resetFrame();
}
};
/**
* If you have set a crop rectangle on this Image via Image.crop and since modified the Image.cropRect property (or the rectangle it references)
* then you need to update the crop frame by calling this method.
*
* @method Phaser.Image#updateCrop
* @memberof Phaser.Image
*/
Phaser.Image.prototype.updateCrop = function() {
if (!this.cropRect)
{
return;
}
this._crop = Phaser.Rectangle.clone(this.cropRect, this._crop);
this._crop.x += this._frame.x;
this._crop.y += this._frame.y;
var cx = Math.max(this._frame.x, this._crop.x);
var cy = Math.max(this._frame.y, this._crop.y);
var cw = Math.min(this._frame.right, this._crop.right) - cx;
var ch = Math.min(this._frame.bottom, this._crop.bottom) - cy;
this.texture.crop.x = cx;
this.texture.crop.y = cy;
this.texture.crop.width = cw;
this.texture.crop.height = ch;