From 9d876960e8914bfa11bc3be1e500832711c20350 Mon Sep 17 00:00:00 2001
From: Ray Molenkamp <github@lazydodo.com>
Date: Fri, 15 Jun 2018 20:17:16 -0600
Subject: This option limits visibility of the glew.h header to just bf_gpu and
 intern_gawain this is to highlight areas in the code that still directly do
 opengl calls or use opengl types.

This is in preparation for supporting alternative rendering back-ends.

Reviewers: brecht, fclem

Differential Revision: https://developer.blender.org/D3304
---
 intern/gawain/CMakeLists.txt      | 7 +++++++
 intern/gawain/gawain/gwn_common.h | 5 ++++-
 2 files changed, 11 insertions(+), 1 deletion(-)

(limited to 'intern/gawain')

diff --git a/intern/gawain/CMakeLists.txt b/intern/gawain/CMakeLists.txt
index 177c76327aa..ced52b22e2c 100644
--- a/intern/gawain/CMakeLists.txt
+++ b/intern/gawain/CMakeLists.txt
@@ -1,3 +1,10 @@
+# WITH_OPENGL limits the visibility of the opengl headers to just gawain and bg_gpu,
+# to more easily highlight codepadths in other libraries that need to be refactored, 
+# bf_intern_gawain is allowed to have opengl regardless of this option.
+
+if(NOT WITH_OPENGL)
+	add_definitions(-DWITH_OPENGL)
+endif()
 
 set(INC
 	gawain
diff --git a/intern/gawain/gawain/gwn_common.h b/intern/gawain/gawain/gwn_common.h
index f1512bf4466..6a56543da40 100644
--- a/intern/gawain/gawain/gwn_common.h
+++ b/intern/gawain/gawain/gwn_common.h
@@ -20,7 +20,10 @@
   #define TRUST_NO_ONE 1
 #endif
 
-#include <GL/glew.h>
+#if defined(WITH_OPENGL)
+  #include <GL/glew.h>
+#endif
+
 #include <stdbool.h>
 #include <stdint.h>
 
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