From f700ee65c37ff1bacbfe41213ee51dcef3437154 Mon Sep 17 00:00:00 2001
From: Sam Lantinga <slouken@libsdl.org>
Date: Sat, 9 Nov 2002 06:20:46 +0000
Subject: [PATCH] Greatly improved X11 DGA video speed (thanks Cezary!)

---
 docs.html                    | 1 +
 src/video/dga/SDL_dgavideo.c | 8 ++++++--
 2 files changed, 7 insertions(+), 2 deletions(-)

diff --git a/docs.html b/docs.html
index 2f330d578..371cb73ca 100644
--- a/docs.html
+++ b/docs.html
@@ -20,6 +20,7 @@ <H2>
 Major changes since SDL 1.0.0:
 </H2>
 <UL>
+	<LI> 1.2.6: Greatly improved X11 DGA video speed (thanks Cezary!)
 	<LI> 1.2.6: Added MMX audio mixing code for gcc (thanks Stephane!)
 	<LI> 1.2.6: Fixed potential dropped events under DirectInput
 	<LI> 1.2.6: Added Visual C++ 7 (.NET) projects (thanks James!)
diff --git a/src/video/dga/SDL_dgavideo.c b/src/video/dga/SDL_dgavideo.c
index 6f24142b5..7ca1d6d30 100644
--- a/src/video/dga/SDL_dgavideo.c
+++ b/src/video/dga/SDL_dgavideo.c
@@ -816,7 +816,9 @@ static int DGA_FillHWRect(_THIS, SDL_Surface *dst, SDL_Rect *rect, Uint32 color)
   printf("Hardware accelerated rectangle fill: %dx%d at %d,%d\n", w, h, x, y);
 #endif
 	SDL_NAME(XDGAFillRectangle)(DGA_Display, DGA_Screen, x, y, w, h, color);
-	XFlush(DGA_Display);
+	if ( !(this->screen->flags & SDL_DOUBLEBUF) ) {
+		XFlush(DGA_Display);
+	}
 	DGA_AddBusySurface(dst);
 	UNLOCK_DISPLAY();
 	return(0);
@@ -856,7 +858,9 @@ static int HWAccelBlit(SDL_Surface *src, SDL_Rect *srcrect,
 		SDL_NAME(XDGACopyArea)(DGA_Display, DGA_Screen,
 			srcx, srcy, w, h, dstx, dsty);
 	}
-	XFlush(DGA_Display);
+	if ( !(this->screen->flags & SDL_DOUBLEBUF) ) {
+		XFlush(DGA_Display);
+	}
 	DGA_AddBusySurface(src);
 	DGA_AddBusySurface(dst);
 	UNLOCK_DISPLAY();