From ac524cf8bf023c7008f42a13311f99ec4bc07680 Mon Sep 17 00:00:00 2001
From: Sam Lantinga <slouken@libsdl.org>
Date: Sat, 5 Oct 2002 16:27:56 +0000
Subject: [PATCH] Fixed gamma correction in Atari video drivers (thanks
 Patrice!)

---
 src/video/gem/SDL_gemvideo.c | 6 +++++-
 src/video/xbios/SDL_xbios.c  | 4 ++--
 2 files changed, 7 insertions(+), 3 deletions(-)

diff --git a/src/video/gem/SDL_gemvideo.c b/src/video/gem/SDL_gemvideo.c
index b7cbf9b25..3a761a1a1 100644
--- a/src/video/gem/SDL_gemvideo.c
+++ b/src/video/gem/SDL_gemvideo.c
@@ -600,7 +600,6 @@ SDL_Surface *GEM_SetVideoMode(_THIS, SDL_Surface *current,
 	Uint32 modeflags, screensize;
 	SDL_bool use_shadow;
 
-	modeflags = SDL_HWPALETTE;
 	GEM_FreeBuffers(this);
 
 	/*--- Verify if asked mode can be used ---*/
@@ -659,6 +658,11 @@ SDL_Surface *GEM_SetVideoMode(_THIS, SDL_Surface *current,
 	}
 
 	/*--- Initialize screen ---*/
+	modeflags = 0;
+	if (VDI_bpp == 8) {
+		modeflags |= SDL_HWPALETTE;
+	}
+
 	if (flags & SDL_FULLSCREEN) {
 		GEM_LockScreen(this);
 
diff --git a/src/video/xbios/SDL_xbios.c b/src/video/xbios/SDL_xbios.c
index f428b2c24..7f3894a6f 100644
--- a/src/video/xbios/SDL_xbios.c
+++ b/src/video/xbios/SDL_xbios.c
@@ -454,7 +454,7 @@ static SDL_Surface *XBIOS_SetVideoMode(_THIS, SDL_Surface *current,
 		return(NULL);
 	}
 
-	modeflags = (SDL_FULLSCREEN|SDL_HWPALETTE);
+	modeflags = SDL_FULLSCREEN;
 
 	/* Allocate needed buffers: simple/double buffer and shadow surface */
 	new_video_mode = XBIOS_videomodes[bpp][mode];
@@ -475,7 +475,7 @@ static SDL_Surface *XBIOS_SetVideoMode(_THIS, SDL_Surface *current,
 		} else {
 			Atari_C2pConvert = Atari_C2pConvert8;
 		}
-		modeflags |= SDL_SWSURFACE;
+		modeflags |= SDL_SWSURFACE|SDL_HWPALETTE;
 	} else {
 		modeflags |= SDL_HWSURFACE;
 	}