304 lines
11 KiB
TypeScript
304 lines
11 KiB
TypeScript
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import { _decorator, Asset, assetManager, BufferAsset, Component, error, Node, resources, TextAsset, Texture2D } from 'cc';
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import { ReadStream } from '../Tool/ReadStream';
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import * as pako from 'pako';
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import { Img, ImgInfo, NpkInfo } from '../GlobalInterface/GlobalInterface';
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const { ccclass, property } = _decorator;
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type NewType = Img;
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@ccclass('ImagePack')
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export class ImagePack extends Component {
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//全局单例类
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private static instance: ImagePack;
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private constructor() {
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super();
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}
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public static getInstance(): ImagePack {
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if (!ImagePack.instance) {
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ImagePack.instance = new ImagePack();
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}
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return ImagePack.instance;
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}
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Key: Array<number> = [112, 117, 99, 104, 105, 107, 111, 110, 64, 110, 101, 111, 112, 108, 101, 32, 100, 117, 110, 103, 101, 111, 110, 32, 97, 110, 100, 32, 102, 105, 103, 104, 116, 101, 114, 32, 68, 78, 70, 68, 78, 70, 68, 78, 70, 68, 78, 70, 68, 78, 70, 68, 78, 70, 68, 78, 70, 68, 78, 70, 68, 78, 70, 68, 78, 70, 68, 78, 70, 68, 78, 70, 68, 78, 70, 68, 78, 70, 68, 78, 70, 68, 78, 70, 68, 78, 70, 68, 78, 70, 68, 78, 70, 68, 78, 70, 68, 78, 70, 68, 78, 70, 68, 78, 70, 68, 78, 70, 68, 78, 70, 68, 78, 70, 68, 78, 70, 68, 78, 70, 68, 78, 70, 68, 78, 70, 68, 78, 70, 68, 78, 70, 68, 78, 70, 68, 78, 70, 68, 78, 70, 68, 78, 70, 68, 78, 70, 68, 78, 70, 68, 78, 70, 68, 78, 70, 68, 78, 70, 68, 78, 70, 68, 78, 70, 68, 78, 70, 68, 78, 70, 68, 78, 70, 68, 78, 70, 68, 78, 70, 68, 78, 70, 68, 78, 70, 68, 78, 70, 68, 78, 70, 68, 78, 70, 68, 78, 70, 68, 78, 70, 68, 78, 70, 68, 78, 70, 68, 78, 70, 68, 78, 70, 68, 78, 70, 68, 78, 70, 68, 78, 70, 68, 78, 70, 68, 78, 70, 68, 78, 70, 68, 78, 70, 68, 78, 70, 68, 78, 70, 68, 78, 70, 68, 78, 70, 68, 78, 70, 68, 78, 70, 68, 78, 70, 0];
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//NPK加载完成后的回调函数
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LoadCallBack = undefined;
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//NPK文件数量
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private NpkCount = 0;
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//已加载NPK文件数量
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private LoadNpkCount = 0;
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//Img的map Key:img路径 Value:Img结构体
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private Map_Img: Map<string, NewType> = new Map<string, Img>();
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//NPK的本地路径 对应的 NPK名字
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private Npk_URL_Table: Map<string, string> = new Map<string, string>();
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start() {
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}
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update(deltaTime: number) {
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}
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initSuccess(): void {
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if (this.LoadCallBack) this.LoadCallBack();
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}
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BundleObject;
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init(Func: Function): void {
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//储存回调
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this.LoadCallBack = Func;
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assetManager.loadBundle('ImagePacks', (err, bundle) => {
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this.BundleObject = bundle;
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this.LoadNpk();
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});
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}
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LoadNpk(): void {
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this.BundleObject.loadDir("", BufferAsset, (err, contents: Array<BufferAsset>) => {
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//记录NPK文件数量
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this.NpkCount = contents.length;
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console.log(this.NpkCount);
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contents.forEach(content => {
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const Buf = new Uint8Array(content.buffer());
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const Ro = new ReadStream(Buf);
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//文件头
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const Header = Ro.GetString();
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if (Header == "NeoplePack_Bill") {
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//读取img数量
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const ImageCount = Ro.GetInt();
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let ImgList: NpkInfo[] = new Array<NpkInfo>(ImageCount);
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for (let i = 0; i < ImageCount; i++) {
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ImgList[i] = {
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Offset: Ro.GetInt(),
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Length: Ro.GetInt(),
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Path: Ro.ReadInfo(this.Key),
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}
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}
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for (let i = 0; i < ImageCount; i++) {
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let Buf: Img = {
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ImgOffset: ImgList[i].Offset,
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ImgSize: ImgList[i].Length,
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Img_Index: i,
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BelongsFile: content.nativeUrl,
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ImgName: ImgList[i].Path,
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Png_List: null,
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Png_Count: 0
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}
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this.Map_Img.set(ImgList[i].Path, Buf);
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}
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}
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//完成一个加载
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this.LoadNpkCount = this.LoadNpkCount + 1;
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//加载完成
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if (this.LoadNpkCount == this.NpkCount) {
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this.initSuccess();
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}
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//把本地路径和NPK名称挂钩一下
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this.Npk_URL_Table.set(content.nativeUrl, content.name);
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//载入完成以后需要释放
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assetManager.releaseAsset(content);
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});
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});
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}
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LoadImgToMem(ImgObj: Img, func: Function) {
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//获取路径 如果不存在直接返回
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const Path = this.Npk_URL_Table.get(ImgObj.BelongsFile);
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if (!Path) return;
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this.BundleObject.load(Path, BufferAsset, (err, content) => {
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const Buf = new Uint8Array(content.buffer());
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const Ro = new ReadStream(Buf);
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Ro.Seekg(ImgObj.ImgOffset);
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//Img头
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const Header = Ro.GetString();
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//开始读图片
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if (Header == "Neople Img File") {
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//索引表大小
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const TableLength = Ro.GetLongInt();
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//img 版本 4字节
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const ver = Ro.GetInt();
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//img 帧数
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const IndexCount = Ro.GetInt();
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ImgObj.Png_Count = IndexCount;
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let PngArr: ImgInfo[] = [];
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for (let index = 0; index < IndexCount; index++) {
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let ImgBuf: ImgInfo = {};
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//图片格式
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ImgBuf.Type = Ro.GetInt();
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if (ImgBuf.Type == 17) {
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//引用贴图
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const IndexBuf = Ro.GetInt();
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ImgBuf.Offset = PngArr[index - 1].Offset;
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ImgBuf.Type = 17;
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ImgBuf.QuoteIndex = IndexBuf;
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ImgBuf.Size = PngArr[index - 1].Size;
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PngArr.push(ImgBuf);
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continue;
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}
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//压缩类型
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ImgBuf.CmpType = Ro.GetInt();
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//宽度
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ImgBuf.Width = Ro.GetInt();
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//高度
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ImgBuf.Height = Ro.GetInt();
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//大小
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ImgBuf.Size = Ro.GetInt();
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//Xpos
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ImgBuf.Xpos = Ro.GetInt();
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//Ypos
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ImgBuf.Ypos = Ro.GetInt();
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//帧域X
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ImgBuf.FrameXpos = Ro.GetInt();
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//帧域Y
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ImgBuf.FrameYpos = Ro.GetInt();
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if (index == 0) {
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ImgBuf.Offset = 0 + ImgObj.ImgOffset + Number(TableLength) + 32;
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} else {
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ImgBuf.Offset = PngArr[index - 1].Offset + PngArr[index - 1].Size;
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}
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PngArr.push(ImgBuf);
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}
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for (let index = 0; index < IndexCount; index++) {
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let PngObj = PngArr[index];
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//引用贴图
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if (PngObj.Type == 17) {
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const QuoteIndexBuf = PngObj.QuoteIndex;
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PngArr[index] = PngArr[QuoteIndexBuf];
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}
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}
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for (let index = 0; index < IndexCount; index++) {
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let PngObj = PngArr[index];
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Ro.Seekg(PngObj.Offset);
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//PNG压缩原始数据
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let DataBuf = Ro.GetBufferByLength(PngObj.Size);
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//图片数据应有大小
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let PngBufSize = PngObj.Width * PngObj.Height * 4;
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// 使用pako 解压 zlib的inflate函数解压缩数据
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let Bsf;
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try {
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Bsf = pako.inflate(DataBuf);
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}
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catch (error) {
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Bsf = DataBuf;
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}
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if (PngObj.Type != 16) {
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let PngByteSize = Bsf.length * 2;
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PngObj.PNGdata = new Uint8Array(PngByteSize);
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for (let e = 0; e < PngByteSize; e += 4) {
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let BarBuf = new Uint8Array(2);
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let Pos = (e / 4) * 2;
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BarBuf[0] = Bsf[Pos];
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BarBuf[1] = Bsf[Pos + 1];
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this.ReadColor(BarBuf, PngObj, e);
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}
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}
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else {
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PngObj.PNGdata = new Uint8Array(Bsf.length);
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for (let index = 0; index < Bsf.length; index += 4) {
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PngObj.PNGdata[index] = Bsf[index + 2];
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PngObj.PNGdata[index + 1] = Bsf[index + 1];
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PngObj.PNGdata[index + 2] = Bsf[index];
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PngObj.PNGdata[index + 3] = Bsf[index + 3];
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}
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}
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}
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ImgObj.Png_List = PngArr;
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func(ImgObj);
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}
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//载入完成以后需要释放
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assetManager.releaseAsset(content);
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});
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}
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ReadColor(Bar: Uint8Array, PngObj: ImgInfo, Offset: number) {
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let a: number = 0;
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let r: number = 0;
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let g: number = 0;
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let b: number = 0;
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switch (PngObj.Type) {
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case 0x0e:
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a = Bar[1] >> 7;
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r = (Bar[1] >> 2) & 0x1f;
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g = (Bar[0] >> 5) | ((Bar[1] & 3) << 3);
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b = Bar[0] & 0x1f;
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a = a * 0xff;
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r = (r << 3) | (r >> 2);
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g = (g << 3) | (g >> 2);
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b = (b << 3) | (b >> 2);
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break;
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case 0x0f:
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a = Bar[1] & 0xf0;
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r = (Bar[1] & 0xf) << 4;
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g = Bar[0] & 0xf0;
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b = (Bar[0] & 0xf) << 4;
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break;
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default:
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console.log(PngObj.Type);
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break;
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}
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PngObj.PNGdata[Offset + 0] = r;
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PngObj.PNGdata[Offset + 1] = g;
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PngObj.PNGdata[Offset + 2] = b;
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PngObj.PNGdata[Offset + 3] = a;
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}
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//读取Img数据
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ReadNpkTable(imgname: string, func: Function): boolean {
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let ImgObj: Img = this.Map_Img.get(imgname);
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if (ImgObj) {
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//没有图片数据 需要加载
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if (ImgObj.Png_List == null) {
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//加载Img进内存
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this.LoadImgToMem(ImgObj, func);
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return true;
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}
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else {
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func(ImgObj);
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return true;
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}
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}
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return false;
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}
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ReleaseNpkTable(p: Img): void {
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// implementation
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}
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}
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