From 50eff29056ce06a9e9ef660bb0465ebb8640c30f Mon Sep 17 00:00:00 2001
From: Vladimir Mandic <mandic00@live.com>
Date: Mon, 8 Nov 2021 11:35:35 -0500
Subject: [PATCH] disable humangl backend if webgl 1.0 is detected

---
 CHANGELOG.md        | 6 +++---
 src/tfjs/humangl.ts | 6 ++++++
 2 files changed, 9 insertions(+), 3 deletions(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index b16e62ac..75410d2f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -9,13 +9,13 @@
   
 ## Changelog
   
+### **HEAD -> main** 2021/11/08 mandic00@live.com
+
+
 ### **2.5.1** 2021/11/08 mandic00@live.com
 
 - new human.compare api
 - added links to release notes
-
-### **origin/main** 2021/11/06 mandic00@live.com
-
 - new frame change detection algorithm
 - add histogram equalization
 - implement wasm missing ops
diff --git a/src/tfjs/humangl.ts b/src/tfjs/humangl.ts
index 907330c0..3022c388 100644
--- a/src/tfjs/humangl.ts
+++ b/src/tfjs/humangl.ts
@@ -61,6 +61,12 @@ export async function register(instance): Promise<void> {
     }
     try {
       config.gl = config.canvas?.getContext('webgl2', config.webGLattr) as WebGL2RenderingContext;
+      const glv2 = config.gl.getParameter(config.gl.VERSION).includes('2.0');
+      if (!glv2) {
+        log('override: using fallback webgl backend as webgl 2.0 is not detected');
+        instance.config.backend = 'webgl';
+        return;
+      }
       if (config.canvas) {
         config.canvas.addEventListener('webglcontextlost', async (e) => {
           log('error: humangl:', e.type);