Fix freeTextureSource() leaving stale entries in textureSourceHashmap

Author: guilhermesimoes

src/tree/TextureManager.mjs

@@ -53,7 +53,7 @@ export default class TextureManager {
         for (let i = 0, n = this._uploadedTextureSources.length; i < n; i++) {
             this._nativeFreeTextureSource(this._uploadedTextureSources[i]);
         }
-        
+
         this.textureSourceHashmap.clear();
         this._usedMemory = 0;
     }
@@ -95,7 +95,7 @@ export default class TextureManager {
         nativeTexture.update = this.stage.frameCounter;
 
         this._uploadedTextureSources.push(textureSource);
-        
+
         this.addToLookupMap(textureSource);
 
         // add VRAM tracking if using the webgl renderer
@@ -140,7 +140,7 @@ export default class TextureManager {
     gc() {
         this.freeUnusedTextureSources();
     }
-    
+
     freeUnusedTextureSources() {
         let remainingTextureSources = [];
         for (let i = 0, n = this._uploadedTextureSources.length; i < n; i++) {
@@ -195,6 +195,10 @@ export default class TextureManager {
             this._nativeFreeTextureSource(textureSource);
         }
 
+        if (textureSource.lookupId) {
+            this.textureSourceHashmap.delete(textureSource.lookupId);
+        }
+
         // Should be reloaded.
         textureSource.loadingSince = null;
     }