Source: https://github.com/anbox/anbox/pull/1877/commits/3e71a84065ca09c605f36ecf2825debf161c1be6
From 3e71a84065ca09c605f36ecf2825debf161c1be6 Mon Sep 17 00:00:00 2001
From: kuailexs <952415538@qq.com>
Date: Fri, 30 Jul 2021 23:54:11 +0800
Subject: [PATCH] fix webview,GL_SHADING_LANGUAGE_VERSION and
 EGL_RENDERABLE_TYPE

---
 android/opengl/system/egl/egl.cpp          | 4 ++++
 src/anbox/graphics/emugl/RenderControl.cpp | 3 +++
 2 files changed, 7 insertions(+)

diff --git a/android/opengl/system/egl/egl.cpp b/android/opengl/system/egl/egl.cpp
index ae5a8892c..981830243 100644
--- a/android/opengl/system/egl/egl.cpp
+++ b/android/opengl/system/egl/egl.cpp
@@ -606,6 +606,10 @@ EGLBoolean eglGetConfigAttrib(EGLDisplay dpy, EGLConfig config, EGLint attribute
 
     if (s_display.getConfigAttrib(config, attribute, value))
     {
+        if (attribute == EGL_RENDERABLE_TYPE && *value > EGL_OPENGL_ES2_BIT){
+	    ALOGE("[%s] EGL_RENDERABLE_TYPE -> EGL_OPENGL_ES2_BIT\n", __FUNCTION__);
+            *value = EGL_OPENGL_ES2_BIT;
+        }
         return EGL_TRUE;
     }
     else
diff --git a/src/anbox/graphics/emugl/RenderControl.cpp b/src/anbox/graphics/emugl/RenderControl.cpp
index 9f2558553..99f30015d 100644
--- a/src/anbox/graphics/emugl/RenderControl.cpp
+++ b/src/anbox/graphics/emugl/RenderControl.cpp
@@ -144,6 +144,9 @@ static EGLint rcGetGLString(EGLenum name, void* buffer, EGLint bufferSize) {
     };
 
     result = filter_extensions(result, whitelisted_extensions);
+  }else if (name == GL_SHADING_LANGUAGE_VERSION) {
+    // GL_VERSION:"OpenGL ES 2.0" matched GL_SHADING_LANGUAGE_VERSION:"OpenGL ES GLSL ES 1.00"
+    result = "OpenGL ES GLSL ES 1.00";
   }
 
   int nextBufferSize = result.size() + 1;