From 338bf9cc6c1f2548e8983bab44fc42f220108d6a Mon Sep 17 00:00:00 2001
From: "J?rgen P. Tjern?" <jorgen@valvesoftware.com>
Date: Wed, 29 Jan 2014 18:38:13 -0800
Subject: [PATCH] Add SDL_GL_ResetAttributes.

---
 include/SDL_video.h               |  5 ++
 src/dynapi/SDL_dynapi_overrides.h |  1 +
 src/dynapi/SDL_dynapi_procs.h     |  1 +
 src/video/SDL_video.c             | 77 ++++++++++++++++++-------------
 4 files changed, 51 insertions(+), 33 deletions(-)

diff --git a/include/SDL_video.h b/include/SDL_video.h
index 4a53f9b34048c..414d26aa24afb 100644
--- a/include/SDL_video.h
+++ b/include/SDL_video.h
@@ -865,6 +865,11 @@ extern DECLSPEC void SDLCALL SDL_GL_UnloadLibrary(void);
 extern DECLSPEC SDL_bool SDLCALL SDL_GL_ExtensionSupported(const char
                                                            *extension);
 
+/**
+ *  \brief Reset all previously set OpenGL context attributes to their default values
+ */
+extern DECLSPEC void SDLCALL SDL_GL_ResetAttributes(void);
+
 /**
  *  \brief Set an OpenGL window attribute before window creation.
  */
diff --git a/src/dynapi/SDL_dynapi_overrides.h b/src/dynapi/SDL_dynapi_overrides.h
index 613582d1d6934..f58dde0fe71e8 100644
--- a/src/dynapi/SDL_dynapi_overrides.h
+++ b/src/dynapi/SDL_dynapi_overrides.h
@@ -570,3 +570,4 @@
 #define SDL_GL_DeleteContext SDL_GL_DeleteContext_REAL
 #define SDL_vsscanf SDL_vsscanf_REAL
 #define SDL_GameControllerAddMappingsFromRW SDL_GameControllerAddMappingsFromRW_REAL
+#define SDL_GL_ResetAttributes SDL_GL_ResetAttributes_REAL
diff --git a/src/dynapi/SDL_dynapi_procs.h b/src/dynapi/SDL_dynapi_procs.h
index cf34efc953f0b..8291d228476ec 100644
--- a/src/dynapi/SDL_dynapi_procs.h
+++ b/src/dynapi/SDL_dynapi_procs.h
@@ -599,3 +599,4 @@ SDL_DYNAPI_PROC(void,SDL_GL_SwapWindow,(SDL_Window *a),(a),)
 SDL_DYNAPI_PROC(void,SDL_GL_DeleteContext,(SDL_GLContext a),(a),)
 SDL_DYNAPI_PROC(int,SDL_vsscanf,(const char *a, const char *b, va_list c),(a,b,c),return)
 SDL_DYNAPI_PROC(int,SDL_GameControllerAddMappingsFromRW,(SDL_RWops *a, int b),(a,b),return)
+SDL_DYNAPI_PROC(void,SDL_GL_ResetAttributes,(void),(),)
diff --git a/src/video/SDL_video.c b/src/video/SDL_video.c
index 157cfa9e71ab0..2e20feabec880 100644
--- a/src/video/SDL_video.c
+++ b/src/video/SDL_video.c
@@ -477,39 +477,7 @@ SDL_VideoInit(const char *driver_name)
     /* Set some very sane GL defaults */
     _this->gl_config.driver_loaded = 0;
     _this->gl_config.dll_handle = NULL;
-    _this->gl_config.red_size = 3;
-    _this->gl_config.green_size = 3;
-    _this->gl_config.blue_size = 2;
-    _this->gl_config.alpha_size = 0;
-    _this->gl_config.buffer_size = 0;
-    _this->gl_config.depth_size = 16;
-    _this->gl_config.stencil_size = 0;
-    _this->gl_config.double_buffer = 1;
-    _this->gl_config.accum_red_size = 0;
-    _this->gl_config.accum_green_size = 0;
-    _this->gl_config.accum_blue_size = 0;
-    _this->gl_config.accum_alpha_size = 0;
-    _this->gl_config.stereo = 0;
-    _this->gl_config.multisamplebuffers = 0;
-    _this->gl_config.multisamplesamples = 0;
-    _this->gl_config.retained_backing = 1;
-    _this->gl_config.accelerated = -1;  /* accelerated or not, both are fine */
-    _this->gl_config.profile_mask = 0;
-#if SDL_VIDEO_OPENGL
-    _this->gl_config.major_version = 2;
-    _this->gl_config.minor_version = 1;
-#elif SDL_VIDEO_OPENGL_ES2
-    _this->gl_config.major_version = 2;
-    _this->gl_config.minor_version = 0;
-    _this->gl_config.profile_mask = SDL_GL_CONTEXT_PROFILE_ES;   
-#elif SDL_VIDEO_OPENGL_ES
-    _this->gl_config.major_version = 1;
-    _this->gl_config.minor_version = 1;
-    _this->gl_config.profile_mask = SDL_GL_CONTEXT_PROFILE_ES;
-#endif
-    _this->gl_config.flags = 0;
-    
-    _this->gl_config.share_with_current_context = 0;
+    SDL_GL_ResetAttributes();
 
     _this->current_glwin_tls = SDL_TLSCreate();
     _this->current_glctx_tls = SDL_TLSCreate();
@@ -2547,6 +2515,49 @@ SDL_GL_ExtensionSupported(const char *extension)
 #endif
 }
 
+void
+SDL_GL_ResetAttributes()
+{
+    if (!_this) {
+        return;
+    }
+
+    _this->gl_config.red_size = 3;
+    _this->gl_config.green_size = 3;
+    _this->gl_config.blue_size = 2;
+    _this->gl_config.alpha_size = 0;
+    _this->gl_config.buffer_size = 0;
+    _this->gl_config.depth_size = 16;
+    _this->gl_config.stencil_size = 0;
+    _this->gl_config.double_buffer = 1;
+    _this->gl_config.accum_red_size = 0;
+    _this->gl_config.accum_green_size = 0;
+    _this->gl_config.accum_blue_size = 0;
+    _this->gl_config.accum_alpha_size = 0;
+    _this->gl_config.stereo = 0;
+    _this->gl_config.multisamplebuffers = 0;
+    _this->gl_config.multisamplesamples = 0;
+    _this->gl_config.retained_backing = 1;
+    _this->gl_config.accelerated = -1;  /* accelerated or not, both are fine */
+    _this->gl_config.profile_mask = 0;
+#if SDL_VIDEO_OPENGL
+    _this->gl_config.major_version = 2;
+    _this->gl_config.minor_version = 1;
+#elif SDL_VIDEO_OPENGL_ES2
+    _this->gl_config.major_version = 2;
+    _this->gl_config.minor_version = 0;
+    _this->gl_config.profile_mask = SDL_GL_CONTEXT_PROFILE_ES;
+#elif SDL_VIDEO_OPENGL_ES
+    _this->gl_config.major_version = 1;
+    _this->gl_config.minor_version = 1;
+    _this->gl_config.profile_mask = SDL_GL_CONTEXT_PROFILE_ES;
+#endif
+    _this->gl_config.flags = 0;
+    _this->gl_config.framebuffer_srgb_capable = 0;
+
+    _this->gl_config.share_with_current_context = 0;
+}
+
 int
 SDL_GL_SetAttribute(SDL_GLattr attr, int value)
 {