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- 求帮忙分析一上JS代码
日期:2014-05-16 浏览次数:20371 次
求帮忙分析一下JS代码
主要功能是将9.PNG图片格式转换成64位的字符串,我要将这个功能写到winfrom里
function Walker() {
this.segments = [];
this.currentSegment = null;
this.i = -1;
};
Walker.prototype.step = function (alpha) {
this.i ++;
if (!this.currentSegment || this.currentSegment.alpha != alpha) {
this.currentSegment = {
start: this.i,
end: this.i,
alpha: alpha
};
this.segments.push(this.currentSegment);
} else {
this.currentSegment.end = this.i;
}
};
var NinePatch = {};
function Point(x, y) {
this.x = x;
this.y = y;
}
NinePatch.start = function (imageUrl) {
/*
var container = document.getElementById("imageContainer");
container.innerHTML = "";
var image = document.createElement("img");
image.onload = function () {
NinePatch.createPatches(image);
};
container.appendChild(image);
image.src = imageUrl;
*/
var image = getSourceImageContainer().firstChild;
NinePatch.createPatches(image);
};
function handleImageLoad () {
var image = getSourceImageContainer().firstChild;
var path = document.getElementById("path");
var html = "<strong>Path:</strong><br/>";
html += image.src;
html += "<br/><strong>Size: </strong>" + (image.width - 2) + " x " + (image.height - 2);
path.innerHTML = html;
NinePatch.createPatches(image);
};
NinePatch.createPatches = function (image) {
var w = image.width;
var h = image.height;
var canvas = document.getElementById("canvas");
var parsedImageContainer = document.getElementById("parsedImageContainer");
parsedImageContainer.innerHTML = "";
canvas.setAttribute("width", w);
canvas.setAttribute("height", h);
var context = canvas.getContext("2d");
context.clearRect(0, 0, w, h);