From 20e1d4d1705e67e2d09b07393ff4223014e47973 Mon Sep 17 00:00:00 2001
From: Dzmitry Malyshau <kvark@fastmail.com>
Date: Tue, 30 Nov 2021 13:30:17 -0500
Subject: [PATCH] hal/gles: don't expose VERTEX_STORAGE if there is no storage

---
 wgpu-hal/src/gles/adapter.rs | 1 +
 1 file changed, 1 insertion(+)

diff --git a/wgpu-hal/src/gles/adapter.rs b/wgpu-hal/src/gles/adapter.rs
index 5f1c036a44..494576b905 100644
--- a/wgpu-hal/src/gles/adapter.rs
+++ b/wgpu-hal/src/gles/adapter.rs
@@ -279,6 +279,7 @@ impl super::Adapter {
         downlevel_flags.set(
             wgt::DownlevelFlags::VERTEX_STORAGE,
             max_storage_block_size != 0
+                && max_storage_buffers_per_shader_stage != 0
                 && (vertex_shader_storage_blocks != 0 || vertex_ssbo_false_zero),
         );
         downlevel_flags.set(wgt::DownlevelFlags::FRAGMENT_STORAGE, supports_storage);