From fa823a37aed99ce3f1cc43f9b21b3e2952535613 Mon Sep 17 00:00:00 2001
From: Kovid Goyal <kovid@kovidgoyal.net>
Date: Thu, 23 Jun 2022 13:00:28 +0530
Subject: [PATCH] Backport
 https://github.com/glfw/glfw/commit/6281f498c875f49d8ac5c5a02d968fb1792fd9f5

---
 glfw/egl_context.c | 4 ++++
 glfw/egl_context.h | 1 +
 glfw/internal.h    | 2 ++
 3 files changed, 7 insertions(+)

diff --git a/glfw/egl_context.c b/glfw/egl_context.c
index a02efb493..a714a12dc 100644
--- a/glfw/egl_context.c
+++ b/glfw/egl_context.c
@@ -428,6 +428,8 @@ bool _glfwInitEGL(void)
         extensionSupportedEGL("EGL_KHR_get_all_proc_addresses");
     _glfw.egl.KHR_context_flush_control =
         extensionSupportedEGL("EGL_KHR_context_flush_control");
+    _glfw.egl.EXT_present_opaque =
+        extensionSupportedEGL("EGL_EXT_present_opaque");
 
     return true;
 }
@@ -598,6 +600,8 @@ bool _glfwCreateContextEGL(_GLFWwindow* window,
         if (_glfw.egl.KHR_gl_colorspace)
             setAttrib(EGL_GL_COLORSPACE_KHR, EGL_GL_COLORSPACE_SRGB_KHR);
     }
+    if (_glfw.egl.EXT_present_opaque)
+        setAttrib(EGL_PRESENT_OPAQUE_EXT, !fbconfig->transparent);
 
     setAttrib(EGL_NONE, EGL_NONE);
 
diff --git a/glfw/egl_context.h b/glfw/egl_context.h
index 2c8b3add8..b35138a7e 100644
--- a/glfw/egl_context.h
+++ b/glfw/egl_context.h
@@ -186,6 +186,7 @@ typedef struct _GLFWlibraryEGL
     bool            EXT_platform_base;
     bool            EXT_platform_x11;
     bool            EXT_platform_wayland;
+    bool            EXT_present_opaque;
     bool            ANGLE_platform_angle;
     bool            ANGLE_platform_angle_opengl;
     bool            ANGLE_platform_angle_d3d;
diff --git a/glfw/internal.h b/glfw/internal.h
index 822d3d356..5a5d7847c 100644
--- a/glfw/internal.h
+++ b/glfw/internal.h
@@ -52,6 +52,8 @@
 #define GLFW_INCLUDE_NONE
 #include "glfw3.h"
 
+#define EGL_PRESENT_OPAQUE_EXT 0x31df
+
 #define _GLFW_INSERT_FIRST      0
 #define _GLFW_INSERT_LAST       1