mirror of
https://github.com/photonstorm/phaser
synced 2024-11-23 21:24:09 +00:00
49 lines
1.3 KiB
TypeScript
49 lines
1.3 KiB
TypeScript
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/// <reference path="../Game.ts" />
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/// <reference path="../core/Point.ts" />
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/// <reference path="../core/Rectangle.ts" />
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/// <reference path="../core/Circle.ts" />
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/**
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* Phaser - PixelUtils
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*
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* A collection of methods useful for manipulating pixels.
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*/
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module Phaser {
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export class PixelUtils {
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static boot() {
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PixelUtils.pixelCanvas = <HTMLCanvasElement> document.createElement('canvas');
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PixelUtils.pixelCanvas.width = 1;
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PixelUtils.pixelCanvas.height = 1;
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PixelUtils.pixelContext = PixelUtils.pixelCanvas.getContext('2d');
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}
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/**
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* Canvas element used in 1x1 pixel checks.
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* @type {HTMLCanvasElement}
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*/
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static pixelCanvas: HTMLCanvasElement;
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/**
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* Render context of pixelCanvas
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* @type {CanvasRenderingContext2D}
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*/
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static pixelContext: CanvasRenderingContext2D;
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static getPixel(key: string, x: number, y: number): number {
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// write out a single pixel (won't help with rotated sprites though.. hmm)
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var imageData = PixelUtils.pixelContext.getImageData(0, 0, 1, 1);
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return ColorUtils.getColor32(imageData.data[3], imageData.data[0], imageData.data[1], imageData.data[2]);
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}
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}
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}
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