From 6d4a5a40a08ec3a4bc451dee8fd62e89c8e0f409 Mon Sep 17 00:00:00 2001
From: Jelle Raaijmakers <jelle@gmta.nl>
Date: Wed, 1 Dec 2021 13:02:32 +0100
Subject: [PATCH] LibGL: Define `GL_ES_VERSION_2_0`

GLES 2.0 is a subset of OpenGL, so we allow applications to compile
against LibGL as if it fully supports GLES 2.0.

Additionally, we set the definitions to an integer value of `1` so
applications that check for availability like this...

    int main() { return GL_ES_VERSION_2_0; }

...can actually compile. At least ScummVM uses this, and Mesa defines
their constants in the same way:

https://gitlab.freedesktop.org/mesa/mesa/-/blob/44b9e11ddbb5f693e299fae034163e7687043862/include/GL/gl.h#L105
---
 Userland/Libraries/LibGL/GL/gl.h | 13 +++++++------
 1 file changed, 7 insertions(+), 6 deletions(-)

diff --git a/Userland/Libraries/LibGL/GL/gl.h b/Userland/Libraries/LibGL/GL/gl.h
index 3d26fa7180..9dcca68f56 100644
--- a/Userland/Libraries/LibGL/GL/gl.h
+++ b/Userland/Libraries/LibGL/GL/gl.h
@@ -15,12 +15,13 @@ extern "C" {
 #    define GLAPI extern
 #endif
 
-#define GL_VERSION_1_0
-#define GL_VERSION_1_1
-#define GL_VERSION_1_2
-#define GL_VERSION_1_3
-#define GL_VERSION_1_4
-#define GL_VERSION_1_5
+#define GL_VERSION_1_0 1
+#define GL_VERSION_1_1 1
+#define GL_VERSION_1_2 1
+#define GL_VERSION_1_3 1
+#define GL_VERSION_1_4 1
+#define GL_VERSION_1_5 1
+#define GL_ES_VERSION_2_0 1
 
 // OpenGL related `defines`
 #define GL_TRUE 1