File 0001-Gui-Quarter-Add-missing-OpenGL-includes.patch of Package FreeCAD

From 70b313a5bd282e09129d0643b96dee85f9494c41 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Stefan=20Br=C3=BCns?= <stefan.bruens@rwth-aachen.de>
Date: Tue, 14 Jun 2022 20:49:08 +0200
Subject: [PATCH] [Gui] Quarter: Add missing OpenGL includes

QuarterWidget directly uses e.g. glPushAttrib/glPopAttrib, and thus should
include the relevant headers.

The headers are required on e.g. ARM platforms where Qt is build with GLES
instead of Desktop GL, and does not implicitly include the headers.

This fixes a regression introduced with commit 9654786c670b ("[Gui]
Quarter: remove unused includes").
---
 src/Gui/Quarter/QuarterWidget.cpp | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/src/Gui/Quarter/QuarterWidget.cpp b/src/Gui/Quarter/QuarterWidget.cpp
index 5e1f89e04d..18f418e19e 100644
--- a/src/Gui/Quarter/QuarterWidget.cpp
+++ b/src/Gui/Quarter/QuarterWidget.cpp
@@ -72,6 +72,11 @@
 #include <Inventor/SbByteBuffer.h>
 #endif
 
+#if !defined(FC_OS_MACOSX)
+# include <GL/gl.h>
+# include <GL/glext.h>
+#endif
+
 #include <Inventor/SbColor.h>
 #include <Inventor/SbViewportRegion.h>
 #include <Inventor/SoDB.h>
@@ -131,10 +136,6 @@ using namespace SIM::Coin3D::Quarter;
 
 #define PRIVATE(obj) obj->pimpl
 
-#ifndef GL_MULTISAMPLE_BIT_EXT
-#define GL_MULTISAMPLE_BIT_EXT 0x20000000
-#endif
-
 //We need to avoid buffer swapping when initializing a QPainter on this widget
 class CustomGLWidget : public QOpenGLWidget {
 public:
-- 
2.36.1