From 2227df83f032ee7868c39fc983749a3fcdc22c7b Mon Sep 17 00:00:00 2001
From: ninja- <ninja-@users.noreply.github.com>
Date: Tue, 30 Jun 2020 19:41:52 +0200
Subject: [PATCH] wayland: fix broken opengl screenshots on mutter

---
 src/egl_context.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/egl_context.c b/src/egl_context.c
index b9736fd16..9189a66c9 100644
--- a/src/egl_context.c
+++ b/src/egl_context.c
@@ -175,6 +175,14 @@ static GLFWbool chooseEGLConfig(const _GLFWctxconfig* ctxconfig,
         u->samples = getEGLConfigAttrib(n, EGL_SAMPLES);
         u->doublebuffer = GLFW_TRUE;
 
+#if defined(_GLFW_WAYLAND)
+        // Avoid using transparent buffer on Wayland if transparency is not requested.
+        // Otherwise mutter will fail to properly screenshot OpenGL content.
+        if (u->alphaBits > 0 && !desired->transparent) {
+            continue;
+        }
+#endif // _GLFW_WAYLAND
+
         u->handle = (uintptr_t) n;
         usableCount++;
     }