From 4bde3d34cf03ff0bc5b64c205a720ca9af88d1eb Mon Sep 17 00:00:00 2001
From: Nick Fisher <nick.fisher@avinium.com>
Date: Thu, 12 Jun 2025 11:34:17 +0800
Subject: [PATCH] (test) add test to create indirect light from irradiance
 texture

---
 thermion_dart/test/light_tests.dart | 89 +++++++++++++++++++++--------
 1 file changed, 65 insertions(+), 24 deletions(-)

diff --git a/thermion_dart/test/light_tests.dart b/thermion_dart/test/light_tests.dart
index b8f11d78..27461815 100644
--- a/thermion_dart/test/light_tests.dart
+++ b/thermion_dart/test/light_tests.dart
@@ -1,37 +1,78 @@
+import 'dart:io';
+
+import 'package:thermion_dart/src/filament/src/implementation/ffi_indirect_light.dart';
+import 'package:thermion_dart/src/filament/src/interface/filament_app.dart';
 import 'package:thermion_dart/src/filament/src/interface/light_options.dart';
 import 'package:test/test.dart';
+import 'package:thermion_dart/thermion_dart.dart';
 import 'package:vector_math/vector_math_64.dart';
 import 'helpers.dart';
 
 void main() async {
   final testHelper = TestHelper("lights");
   await testHelper.setup();
-  
-    test('add/clear point light', () async {
-      await testHelper.withViewer((viewer) async {
-        await viewer.loadGltf("file://${testHelper.testDir}/assets/cube.glb");
 
-        var light = await viewer.addDirectLight(
-            DirectLight.point(intensity: 1000000, falloffRadius: 10));
-        await viewer.setLightPosition(light, 1, 2, 2);
-        await testHelper.capture(viewer.view, "add_point_light");
-        await viewer.setLightPosition(light, -1, 2, 2);
-        await testHelper.capture(viewer.view, "move_point_light");
-        await viewer.removeLight(light);
-        await testHelper.capture(viewer.view, "remove_point_light");
-      });
+  test('add/clear point light', () async {
+    await testHelper.withViewer((viewer) async {
+      await viewer.loadGltf("file://${testHelper.testDir}/assets/cube.glb");
+
+      var light = await viewer.addDirectLight(
+          DirectLight.point(intensity: 1000000, falloffRadius: 10));
+      await viewer.setLightPosition(light, 1, 2, 2);
+      await testHelper.capture(viewer.view, "add_point_light");
+      await viewer.setLightPosition(light, -1, 2, 2);
+      await testHelper.capture(viewer.view, "move_point_light");
+      await viewer.removeLight(light);
+      await testHelper.capture(viewer.view, "remove_point_light");
     });
+  });
+
+  test('load/remove ibl from KTX', () async {
+    await testHelper.withViewer((viewer) async {
+      var asset =
+          await viewer.loadGltf("file://${testHelper.testDir}/assets/cube.glb");
+      await viewer
+          .loadIbl("file://${testHelper.testDir}/assets/default_env_ibl.ktx");
+      await testHelper.capture(viewer.view, "ibl_ktx_loaded");
+      await viewer.removeIbl();
+      await testHelper.capture(viewer.view, "ibl_ktx_removed");
+    }, cameraPosition: Vector3(0, 0, 5));
+  });
+
+  test('load/remove ibl with manually constructed texture', () async {
+    await testHelper.withViewer((viewer) async {
+      var asset =
+          await viewer.loadGltf("file://${testHelper.testDir}/assets/cube.glb");
 
 
-      test('load/remove ibl', () async {
-      await testHelper.withViewer((viewer) async {
-        var asset = await viewer
-            .loadGltf("file://${testHelper.testDir}/assets/cube.glb");
-        await viewer
-            .loadIbl("file://${testHelper.testDir}/assets/default_env_ibl.ktx");
-        await testHelper.capture(viewer.view, "ibl_loaded");
-        await viewer.removeIbl();
-        await testHelper.capture(viewer.view, "ibl_removed");
-      }, cameraPosition: Vector3(0, 0, 5));
-    });
+      final (texture: reflectionsTexture, :harmonics) =
+          await FilamentApp.instance!.decodeKtx(await File("${testHelper.testDir}/assets/default_env_ibl.ktx").readAsBytesSync());
+          
+
+      final texture = await FilamentApp.instance!.createTexture(1, 1,
+          textureSamplerType: TextureSamplerType.SAMPLER_CUBEMAP,
+          flags: {
+            
+            TextureUsage.TEXTURE_USAGE_COLOR_ATTACHMENT,
+            
+          });
+      await texture.setImage(
+          0,
+          Float32List.fromList(List<double>.filled(1 * 1 * 4, 1.0)).asUint8List(),
+          1,
+          1,
+          4,
+          PixelDataFormat.RGBA,
+          PixelDataType.FLOAT);
+
+      var indirectLight = await FFIIndirectLight.fromIrradianceTexture(reflectionsTexture, reflectionsTexture: reflectionsTexture, intensity: 30000.0);
+      final scene = await viewer.view.getScene();
+      await scene.setIndirectLight(indirectLight);
+
+      await testHelper.capture(viewer.view, "ibl_from_texture_loaded");
+
+      await viewer.removeIbl();
+      await testHelper.capture(viewer.view, "ibl_from_texture_removed");
+    }, cameraPosition: Vector3(0, 0, 5), addSkybox: true);
+  });
 }