Texture improvements: generateMipmaps(), add levels to createTexture, tests to check auto mip level selection

thermion_dart/lib/src/filament/src/implementation/ffi_texture.dart

@@ -10,17 +10,13 @@ class FFITexture extends Texture {
   FFITexture(this._engine, this.pointer);
 
   Future<void> setLinearImage(covariant FFILinearImage image,
-      PixelDataFormat format, PixelDataType type) async {
+      PixelDataFormat format, PixelDataType type,
+      {int level = 0}) async {
     final tPixelDataFormat = format.value;
     final tPixelDataType = type.value;
     final result = await withBoolCallback((cb) {
-      Texture_loadImageRenderThread(
-          _engine,
-          pointer,
-          image.pointer,
-          tPixelDataFormat,
-          tPixelDataType,
-          cb);
+      Texture_loadImageRenderThread(_engine, pointer, image.pointer,
+          tPixelDataFormat, tPixelDataType, level, cb);
     });
 
     if (!result) {
@@ -31,14 +27,13 @@ class FFITexture extends Texture {
   @override
   Future<void> dispose() async {
     await withVoidCallback((requestId, cb) {
-      Engine_destroyTextureRenderThread(_engine, pointer, requestId,cb);
+      Engine_destroyTextureRenderThread(_engine, pointer, requestId, cb);
     });
   }
 
   @override
-  Future<void> generateMipmaps() {
-    // TODO: implement generateMipmaps
-    throw UnimplementedError();
+  Future<void> generateMipmaps() async {
+    Texture_generateMipMaps(pointer, _engine);
   }
 
   @override
@@ -58,9 +53,8 @@ class FFITexture extends Texture {
   }
 
   @override
-  Future<int> getLevels() {
-    // TODO: implement getLevels
-    throw UnimplementedError();
+  Future<int> getLevels() async {
+    return Texture_getLevels(pointer);
   }
 
   @override
@@ -116,7 +110,7 @@ class FFITexture extends Texture {
       Uint8List buffer,
       PixelDataFormat format,
       PixelDataType type) async {
-        throw UnimplementedError();
+    throw UnimplementedError();
     // final success = await withBoolCallback((cb) {
     //   Texture_setImageWithDepthRenderThread(
     //       _engine,
@@ -316,8 +310,9 @@ class FFITextureSampler extends TextureSampler {
   // }
 
   Future<void> setAnisotropy(double anisotropy) async {
-    await withVoidCallback((requestId,cb) {
-      TextureSampler_setAnisotropyRenderThread(pointer, anisotropy, requestId,cb);
+    await withVoidCallback((requestId, cb) {
+      TextureSampler_setAnisotropyRenderThread(
+          pointer, anisotropy, requestId, cb);
     });
   }
 
@@ -334,8 +329,8 @@ class FFITextureSampler extends TextureSampler {
 
   @override
   Future dispose() async {
-    await withVoidCallback((requestId,cb) {
-      TextureSampler_destroyRenderThread(pointer, requestId,cb);
+    await withVoidCallback((requestId, cb) {
+      TextureSampler_destroyRenderThread(pointer, requestId, cb);
     });
   }
 }

thermion_dart/lib/src/filament/src/interface/texture.dart

@@ -330,8 +330,10 @@ abstract class Texture {
   /// Returns the internal format of this texture
   Future<TextureFormat> getFormat();
 
+  /// Sets the given [image] as the source data for this texture.
+  ///
   Future setLinearImage(
-      covariant LinearImage image, PixelDataFormat format, PixelDataType type);
+      covariant LinearImage image, PixelDataFormat format, PixelDataType type, {int level = 0});
 
   /// Sets the image data for a 2D texture or a texture level
   Future setImage(int level, Uint8List buffer, int width, int height, 
@@ -485,13 +487,14 @@ abstract class LinearImage {
   ///
   ///
   ///
-  static Future<Texture> decodeToTexture(Uint8List data, { TextureFormat textureFormat = TextureFormat.RGB32F, PixelDataFormat pixelDataFormat = PixelDataFormat.RGB, PixelDataType pixelDataType = PixelDataType.FLOAT}) async {
+  static Future<Texture> decodeToTexture(Uint8List data, { TextureFormat textureFormat = TextureFormat.RGB32F, PixelDataFormat pixelDataFormat = PixelDataFormat.RGB, PixelDataType pixelDataType = PixelDataType.FLOAT, int levels = 1}) async {
     final decodedImage = await FilamentApp.instance!.decodeImage(data);
     
     final texture = await FilamentApp.instance!.createTexture(
       await decodedImage.getWidth(),
       await decodedImage.getHeight(),
       textureFormat: textureFormat,
+      levels:levels
     );
 
     await texture.setLinearImage(