From cc250beadcc56585467b3e0c34722b076f983be8 Mon Sep 17 00:00:00 2001
From: Matthias Clasen <mclasen@redhat.com>
Date: Tue, 18 Jul 2023 23:45:06 -0400
Subject: [PATCH] glyphy: Declare that we are using dFdx

GLES2 does not have these by default :(
---
 gsk/gl/resources/preamble.glsl | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/gsk/gl/resources/preamble.glsl b/gsk/gl/resources/preamble.glsl
index 46bebc14e0..1237951dff 100644
--- a/gsk/gl/resources/preamble.glsl
+++ b/gsk/gl/resources/preamble.glsl
@@ -1,3 +1,5 @@
+#extension GL_OES_standard_derivatives : enable
+
 #ifndef GSK_LEGACY
 precision highp float;
 #endif