From a7866c214d3eae95d075caeeceb829d01c8a2f99 Mon Sep 17 00:00:00 2001
From: Robert Ancell <robert.ancell@canonical.com>
Date: Thu, 25 Jul 2024 09:16:06 +0100
Subject: [PATCH] Add a precision to the fragment shader

This is required for OpenGL ES.

https://github.com/flutter/flutter/issues/152297
---
 shell/platform/linux/fl_renderer.cc | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/shell/platform/linux/fl_renderer.cc b/shell/platform/linux/fl_renderer.cc
index 80bdbea2db06a..1abdcd0172038 100644
--- a/shell/platform/linux/fl_renderer.cc
+++ b/shell/platform/linux/fl_renderer.cc
@@ -25,6 +25,10 @@ static const char* vertex_shader_src =
 
 // Fragment shader to draw Flutter window contents.
 static const char* fragment_shader_src =
+    "#ifdef GL_ES\n"
+    "precision mediump float;\n"
+    "#endif\n"
+    "\n"
     "uniform sampler2D texture;\n"
     "varying vec2 texcoord;\n"
     "\n"