From 8b88bf088ca1f422b0e575b88459fa8933580f28 Mon Sep 17 00:00:00 2001
From: Lingxi <2863878907@qq.com>
Date: Fri, 20 Dec 2024 20:17:46 +0800
Subject: [PATCH] feat: pixi video resource

---
 .../controller/stage/pixi/PixiController.ts   | 88 +++++++++++++++++++
 .../webgal/src/Stage/MainStage/useSetBg.ts    |  5 +-
 2 files changed, 92 insertions(+), 1 deletion(-)

diff --git a/packages/webgal/src/Core/controller/stage/pixi/PixiController.ts b/packages/webgal/src/Core/controller/stage/pixi/PixiController.ts
index ddd8aac00..0aa6edad0 100644
--- a/packages/webgal/src/Core/controller/stage/pixi/PixiController.ts
+++ b/packages/webgal/src/Core/controller/stage/pixi/PixiController.ts
@@ -474,6 +474,94 @@ export default class PixiStage {
     }
   }
 
+  /**
+   * 添加视频背景
+   * @param key 背景的标识，一般和背景类型有关
+   * @param url 背景图片url
+   */
+  public addVideoBg(key: string, url: string) {
+    const loader = this.assetLoader;
+    // 准备用于存放这个背景的 Container
+    const thisBgContainer = new WebGALPixiContainer();
+
+    // 是否有相同 key 的背景
+    const setBgIndex = this.backgroundObjects.findIndex((e) => e.key === key);
+    const isBgSet = setBgIndex >= 0;
+
+    // 已经有一个这个 key 的背景存在了
+    if (isBgSet) {
+      // 挤占
+      this.removeStageObjectByKey(key);
+    }
+
+    // 挂载
+    this.backgroundContainer.addChild(thisBgContainer);
+    const bgUuid = uuid();
+    this.backgroundObjects.push({
+      uuid: bgUuid,
+      key: key,
+      pixiContainer: thisBgContainer,
+      sourceUrl: url,
+      sourceType: 'video',
+      sourceExt: this.getExtName(url),
+    });
+
+    // 完成加载后执行的函数
+    const setup = () => {
+      // TODO：找一个更好的解法，现在的解法是无论是否复用原来的资源，都设置一个延时以让动画工作正常！
+
+      setTimeout(() => {
+        console.debug('start loaded video: ' + url);
+        let texture;
+        if (!loader.resources?.[url]?.texture) {
+          const video = document.createElement('video');
+          video.src = url;
+          video.preload = 'auto';
+          video.loop = true;
+          video.muted = true;
+          video.autoplay = true;
+          const videoResource = new PIXI.VideoResource(video);
+          videoResource.updateFPS = 30;
+          // @ts-ignore
+          texture = PIXI.Texture.from(videoResource);
+        } else {
+          texture = loader.resources?.[url]?.texture;
+        }
+        if (texture && this.getStageObjByUuid(bgUuid)) {
+          /**
+           * 重设大小
+           */
+          const originalWidth = texture.width;
+          const originalHeight = texture.height;
+          const scaleX = this.stageWidth / originalWidth;
+          const scaleY = this.stageHeight / originalHeight;
+          const targetScale = Math.max(scaleX, scaleY);
+          const bgSprite = new PIXI.Sprite(texture);
+          bgSprite.scale.x = targetScale;
+          bgSprite.scale.y = targetScale;
+          bgSprite.anchor.set(0.5);
+          bgSprite.position.y = this.stageHeight / 2;
+          thisBgContainer.setBaseX(this.stageWidth / 2);
+          thisBgContainer.setBaseY(this.stageHeight / 2);
+          thisBgContainer.pivot.set(0, this.stageHeight / 2);
+          thisBgContainer.addChild(bgSprite);
+          console.debug('loaded video: ' + url);
+        }
+      }, 0);
+    };
+
+    /**
+     * 加载器部分
+     */
+    this.cacheGC();
+    if (!loader.resources?.[url]?.texture) {
+      this.loadAsset(url, setup);
+    } else {
+      // 复用
+      setup();
+    }
+  }
+
   /**
    * 添加立绘
    * @param key 立绘的标识，一般和立绘位置有关
diff --git a/packages/webgal/src/Stage/MainStage/useSetBg.ts b/packages/webgal/src/Stage/MainStage/useSetBg.ts
index a292c0dd4..3e4708af7 100644
--- a/packages/webgal/src/Stage/MainStage/useSetBg.ts
+++ b/packages/webgal/src/Stage/MainStage/useSetBg.ts
@@ -54,7 +54,10 @@ function removeBg(bgObject: IStageObject) {
 
 function addBg(type?: 'image' | 'spine', ...args: any[]) {
   const url = args[1];
-  if (url.endsWith('.skel')) {
+  if (url.endsWith('.mp4')) {
+    // @ts-ignore
+    return WebGAL.gameplay.pixiStage?.addVideoBg(...args);
+  } else if (url.endsWith('.skel')) {
     // @ts-ignore
     return WebGAL.gameplay.pixiStage?.addSpineBg(...args);
   } else {