From 86355ee16848f006d8c34f83461efc8d864b9b33 Mon Sep 17 00:00:00 2001
From: Viktor Kovacs <viktorkovacs@gmail.com>
Date: Thu, 3 Jun 2021 10:03:46 +0200
Subject: [PATCH] Add driver issue detector experiment.

---
 sandbox/invalid_driver_detector.html | 81 ++++++++++++++++++++++++++++
 1 file changed, 81 insertions(+)
 create mode 100644 sandbox/invalid_driver_detector.html
diff --git a/sandbox/invalid_driver_detector.html b/sandbox/invalid_driver_detector.html
new file mode 100644
index 0000000..7304e7c
--- /dev/null
+++ b/sandbox/invalid_driver_detector.html
@@ -0,0 +1,81 @@
+<!DOCTYPE html>
+<html>
+
+<head>
+	<meta http-equiv="content-type" content="text/html;charset=utf-8">
+	<meta name="viewport" content="width=device-width, user-scalable=no">
+
+	<title>Online 3D Viewer</title>
+
+	<script type="text/javascript" src="../../libs/three.min-126.js"></script>
+	<script type='text/javascript'>
+		function HasHighpDriverIssue ()
+		{
+			let canvas = document.createElement ('canvas');
+			document.body.appendChild (canvas);
+			let parameters = {
+				canvas : canvas,
+				antialias : true
+			};
+		
+			let renderer = new THREE.WebGLRenderer (parameters);
+			renderer.setClearColor ('#ffffff', 1);
+			renderer.setSize (10, 10);
+		
+			let scene = new THREE.Scene ();
+
+			let ambientLight = new THREE.AmbientLight (0x888888);
+			scene.add (ambientLight);
+
+			let light = new THREE.DirectionalLight (0x888888);
+			light.position.set (0.0, 0.0, 1.0);	
+			scene.add (light);
+
+			let camera = new THREE.PerspectiveCamera (45.0, 1.0, 0.1, 1000.0);
+			camera.position.set (0.0, 0.0, 1.0);
+			camera.up.set (0.0, 1.0, 0.0);
+			camera.lookAt (new THREE.Vector3 (0.0, 0.0, 0.0));
+			scene.add (camera);
+
+			let plane = new THREE.PlaneGeometry (1.0, 1.0);
+			let mesh = new THREE.Mesh (plane, new THREE.MeshPhongMaterial ({
+				color : 0xcc0000
+			}));
+			scene.add (mesh);
+			renderer.render (scene, camera);
+
+			let context = renderer.getContext ();
+			var pixels = new Uint8Array (4);
+			context.readPixels(
+				5, 5, 1, 1,
+				context.RGBA,
+				context.UNSIGNED_BYTE,
+				pixels
+			);
+			
+			// TODO: remove
+			let resultDiv = document.createElement ('div');
+			document.body.appendChild (resultDiv);
+			resultDiv.innerHTML = pixels;
+
+			document.body.removeChild (canvas);
+			if (pixels[0] < 50 && pixels[1] < 50 && pixels[2] < 50) {
+				return true;
+			}
+			return false;
+		}
+	
+		window.onload = function () {
+			let hasIssue = HasHighpDriverIssue ();
+			let resultDiv = document.createElement ('div');
+			document.body.appendChild (resultDiv);
+			resultDiv.innerHTML = hasIssue ? 'Invalid driver detected' : 'Everything is OK';
+		};
+	</script>
+</head>
+
+<body>
+	
+</body>
+
+</html>
