core: Only scale filters with stage view matrix

core/src/display_object.rs

@@ -738,9 +738,11 @@ pub fn render_base<'gc>(this: DisplayObject<'gc>, context: &mut RenderContext<'_
                     y_min: 0,
                     y_max: height as i32,
                 };
+                let stage_matrix = context.stage.view_matrix();
                 for filter in &mut filters {
+                    // Scaling is done by *stage view matrix* only, nothing in-between
+                    filter.scale(stage_matrix.a, stage_matrix.d);
                     filter_rect = context.renderer.calculate_dest_rect(filter, filter_rect);
-                    filter.scale(base_transform.matrix.a, base_transform.matrix.d);
                 }
                 let draw_offset = Point::new(filter_rect.x_min, filter_rect.y_min);
                 if cache.is_dirty(&base_transform.matrix, width, height) {

tests/tests/swfs/avm2/bitmapdata_applyfilter_blur/test.toml

@@ -1,7 +1,7 @@
 num_frames = 1
 
 [image_comparison]
-tolerance = 2
+tolerance = 8
 
 [player_options]
 with_renderer = { sample_count = 1 }

tests/tests/swfs/visual/filters/blur_size_grows/test.toml

@@ -1,7 +1,7 @@
 num_frames = 1
 
 [image_comparison]
-tolerance = 2
+tolerance = 3
 
 [player_options]
 with_renderer = { optional = false, sample_count = 1 }