From b429cce3b66dc3556d97a1ae2c51c4a8b5005e42 Mon Sep 17 00:00:00 2001
From: Ronald Kinard <furyhunter600@gmail.com>
Date: Thu, 24 Jul 2014 22:35:04 -0500
Subject: [PATCH] sdl2: add -borderless option for windowed

---
 src/sdl2/i_video.c | 17 ++++++++++++-----
 1 file changed, 12 insertions(+), 5 deletions(-)

diff --git a/src/sdl2/i_video.c b/src/sdl2/i_video.c
index 3718d3cef..12c36c7e2 100644
--- a/src/sdl2/i_video.c
+++ b/src/sdl2/i_video.c
@@ -133,6 +133,7 @@ static       SDL_bool    mousegrabok = SDL_TRUE;
 static       SDL_bool    videoblitok = SDL_FALSE;
 static       SDL_bool    exposevideo = SDL_FALSE;
 static       SDL_bool    usesdl2soft = SDL_FALSE;
+static       SDL_bool    borderlesswindow = SDL_FALSE;
 
 // SDL2 vars
 SDL_Window   *window;
@@ -1387,6 +1388,7 @@ void I_FinishUpdate(void)
 			SDL_UpdateTexture(texture, &rect, vidSurface->pixels, vidSurface->pitch);
 			SDL_UnlockSurface(vidSurface);
 		}
+		SDL_RenderClear(renderer);
 		SDL_RenderCopy(renderer, texture, NULL, NULL);
 		SDL_RenderPresent(renderer);
 	}
@@ -1660,7 +1662,12 @@ static SDL_bool Impl_CreateWindow(SDL_bool fullscreen)
 
 	if (fullscreen)
 	{
-		flags = SDL_WINDOW_FULLSCREEN_DESKTOP;
+		flags |= SDL_WINDOW_FULLSCREEN_DESKTOP;
+	}
+
+	if (borderlesswindow)
+	{
+		flags |= SDL_WINDOW_BORDERLESS;
 	}
 
 #ifdef HWRENDER
@@ -1819,10 +1826,10 @@ void I_StartupGraphics(void)
 	{
 		rendermode = render_soft;
 	}
-	if (M_CheckParm("-softblit"))
-	{
-		usesdl2soft = SDL_TRUE;
-	}
+
+	usesdl2soft = M_CheckParm("-softblit");
+	borderlesswindow = M_CheckParm("-borderless");
+
 	//SDL_EnableKeyRepeat(SDL_DEFAULT_REPEAT_DELAY>>1,SDL_DEFAULT_REPEAT_INTERVAL<<2);
 	SDLESSet();
 	VID_Command_ModeList_f();