Fix window handling when switch from gl to soft renderer.

Make sure that the window is destroyed at gl renderer shutdown and
recreated by the soft renderer. Don't deinitialize SDL in the
softrenderer, that's done by vid.c. And make sure that we start the soft
renderer with a clean GL state.

src/client/refresh/soft/sw_main.c

@@ -2074,11 +2074,6 @@ SWimp_Shutdown( void )
 {
 	SWimp_DestroyRender();
 
-	if (SDL_WasInit(SDL_INIT_EVERYTHING) == SDL_INIT_VIDEO)
-		SDL_Quit();
-	else
-		SDL_QuitSubSystem(SDL_INIT_VIDEO);
-
 	X11_active = false;
 }
 

src/client/vid/glimp_sdl.c

@@ -185,6 +185,8 @@ GLimp_Init(void)
 void
 GLimp_Shutdown(void)
 {
+	ShutdownGraphics();
+
 	if (SDL_WasInit(SDL_INIT_EVERYTHING) == SDL_INIT_VIDEO)
 	{
 		SDL_Quit();
@@ -332,6 +334,16 @@ GLimp_InitGraphics(int fullscreen, int *pwidth, int *pheight)
 	return true;
 }
 
+/*
+ * Shuts the window down.
+ */
+void
+GLimp_ShutdownGraphics(void)
+{
+	SDL_GL_ResetAttributes();
+	ShutdownGraphics();
+}
+
 /*
  * (Un)grab Input
  */

src/client/vid/header/vid.h

@@ -58,6 +58,7 @@ extern int glimp_refreshRate;
 qboolean GLimp_Init(void);
 void GLimp_Shutdown(void);
 qboolean GLimp_InitGraphics(int fullscreen, int *pwidth, int *pheight);
+void GLimp_ShutdownGraphics(void);
 void GLimp_GrabInput(qboolean grab);
 int GLimp_GetRefreshRate(void);
 

src/client/vid/vid.c

@@ -337,6 +337,7 @@ VID_ShutdownRenderer(void)
 	{
 		/* Shut down the renderer */
 		re.Shutdown();
+		GLimp_ShutdownGraphics();
 		Sys_FreeLibrary(reflib_handle);
 		reflib_handle = NULL;
 		memset(&re, 0, sizeof(re));