From 49dd714fbf0c9f2050f50a83cbfb99929e8e13b2 Mon Sep 17 00:00:00 2001
From: Greggman <github@greggman.com>
Date: Fri, 26 Jan 2024 06:58:23 +0900
Subject: [PATCH] Compat: Fix storage texture read_write test (#3328)

* Compat: Fix storage texture read_write test

The test used 256 invocations but compat only supports 128
---
 src/webgpu/api/operation/storage_texture/read_write.spec.ts | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/webgpu/api/operation/storage_texture/read_write.spec.ts b/src/webgpu/api/operation/storage_texture/read_write.spec.ts
index b0a2256d9243..5daac5d6fe56 100644
--- a/src/webgpu/api/operation/storage_texture/read_write.spec.ts
+++ b/src/webgpu/api/operation/storage_texture/read_write.spec.ts
@@ -318,7 +318,9 @@ g.test('basic')
   .fn(t => {
     const { format, shaderStage, textureDimension, depthOrArrayLayers } = t.params;
 
-    const kWidth = 16;
+    // In compatibility mode the lowest maxComputeInvocationsPerWorkgroup is 128 vs non-compat which is 256
+    // So in non-compat we get 16 * 8 * 2, vs compat where we get 8 * 8 * 2
+    const kWidth = t.isCompatibility ? 8 : 16;
     const height = textureDimension === '1d' ? 1 : 8;
     const textureSize = [kWidth, height, depthOrArrayLayers] as const;
     const storageTexture = t.device.createTexture({