[FIX] Refresh texture state when toggling mipmaps (playcanvas#8455)

* [FIX] Refresh texture state when mipmaps toggles

Update Texture#mipmaps to recalculate mip levels and mark min filter parameters dirty when toggled, so runtime mipmap changes apply immediately without requiring unrelated texture edits.

Co-authored-by: Cursor <cursoragent@cursor.com>

* Update src/platform/graphics/texture.js

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

* [FIX] Handle mipmaps toggle edge cases

Base mip upload scheduling on effective mipmap state after _updateNumLevel, and recreate array texture storage when mip level count changes to keep immutable GPU allocation in sync.

Co-authored-by: Cursor <cursoragent@cursor.com>

* Add s to _updateNumLevel

---------

Co-authored-by: Cursor <cursoragent@cursor.com>
Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

Author: 3 people

src/platform/graphics/texture.js

@@ -265,7 +265,7 @@ class Texture {
         if (options.numLevels !== undefined) {
             this._numLevels = options.numLevels;
         }
-        this._updateNumLevel();
+        this._updateNumLevels();
 
         this._minFilter = options.minFilter ?? FILTER_LINEAR_MIPMAP_LINEAR;
         this._magFilter = options.magFilter ?? FILTER_LINEAR;
@@ -376,7 +376,7 @@ class Texture {
             this._width = Math.floor(width);
             this._height = Math.floor(height);
             this._depth = Math.floor(depth);
-            this._updateNumLevel();
+            this._updateNumLevels();
 
             // re-create the implementation
             this.impl = device.createTextureImpl(this);
@@ -421,7 +421,7 @@ class Texture {
         this.renderVersionDirty = this.device.renderVersion;
     }
 
-    _updateNumLevel() {
+    _updateNumLevels() {
 
         const maxLevels = this.mipmaps ? TextureUtils.calcMipLevelsCount(this.width, this.height) : 1;
         const requestedLevels = this._numLevelsRequested;
@@ -673,12 +673,25 @@ class Texture {
             } else if (isIntegerPixelFormat(this._format)) {
                 Debug.warn('Texture#mipmaps: mipmap property cannot be changed on an integer texture, will remain false', this);
             } else {
+                const oldMipmaps = this._mipmaps;
+                const oldNumLevels = this._numLevels;
+
                 this._mipmaps = v;
-            }
+                this._updateNumLevels();
 
-            if (v) {
-                this._needsMipmapsUpload = true;
-                this.device?.texturesToUpload?.add(this);
+                // Changing mip count on array textures requires re-creating immutable storage.
+                if (this.array && this._numLevels !== oldNumLevels) {
+                    this.recreateImpl();
+                } else if (this._mipmaps !== oldMipmaps) {
+                    this.propertyChanged(TEXPROPERTY_MIN_FILTER);
+
+                    if (this._mipmaps) {
+                        this._needsMipmapsUpload = true;
+                        this.device?.texturesToUpload?.add(this);
+                    } else {
+                        this._needsMipmapsUpload = false;
+                    }
+                }
             }
         }
     }