From e8458df2b46a807f5747e216154ce741c700403d Mon Sep 17 00:00:00 2001
From: Sam Lantinga <slouken@libsdl.org>
Date: Wed, 15 Aug 2007 03:52:31 +0000
Subject: [PATCH] Optimization suggested by Ryan: Don't set the same OpenGL
 context multiple times

--HG--
extra : convert_revision : svn%3Ac70aab31-4412-0410-b14c-859654838e24/trunk%402607
---
 src/video/SDL_sysvideo.h | 1 +
 src/video/SDL_video.c    | 6 ++++++
 2 files changed, 7 insertions(+)

diff --git a/src/video/SDL_sysvideo.h b/src/video/SDL_sysvideo.h
index 32896d44a..f4306fa48 100644
--- a/src/video/SDL_sysvideo.h
+++ b/src/video/SDL_sysvideo.h
@@ -126,6 +126,7 @@ struct SDL_Window
 
     int display;
     SDL_Renderer *renderer;
+    SDL_GLContext context;
 
     void *userdata;
     void *driverdata;
diff --git a/src/video/SDL_video.c b/src/video/SDL_video.c
index 9801572a1..e535539ec 100644
--- a/src/video/SDL_video.c
+++ b/src/video/SDL_video.c
@@ -2566,6 +2566,12 @@ SDL_GL_MakeCurrent(SDL_WindowID windowID, SDL_GLContext context)
     if (!context) {
         window = NULL;
     }
+    if (window) {
+        if (window->context == context) {
+            return 0;
+        }
+        window->context = context;
+    }
     return _this->GL_MakeCurrent(_this, window, context);
 }