From f7f11f555916c7e68e4dce2c29d5d5b7ed557131 Mon Sep 17 00:00:00 2001
From: Sam Lantinga <slouken@libsdl.org>
Date: Mon, 14 Jan 2002 19:20:39 +0000
Subject: [PATCH] *** empty log message ***

---
 src/video/SDL_surface.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/video/SDL_surface.c b/src/video/SDL_surface.c
index 414be1d3c..a86c2abec 100644
--- a/src/video/SDL_surface.c
+++ b/src/video/SDL_surface.c
@@ -711,6 +711,14 @@ SDL_Surface * SDL_ConvertSurface (SDL_Surface *surface,
 		}
 	}
 
+	/* Only create hw surfaces with alpha channel if hw alpha blits
+	   are supported */
+	if(format->Amask != 0 && (flags & SDL_HWSURFACE)) {
+		const SDL_VideoInfo *vi = SDL_GetVideoInfo();
+		if(!vi || !vi->blit_hw_A)
+			flags &= ~SDL_HWSURFACE;
+	}
+
 	/* Create a new surface with the desired format */
 	convert = SDL_CreateRGBSurface(flags,
 				surface->w, surface->h, format->BitsPerPixel,