mimic a swap on flush events to force display in single buffering mode (and glSwapBuffers would not be called).

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@28806 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/add-ons/opengl/mesa_software_renderer/MesaSoftwareRenderer.cpp

@@ -236,7 +236,7 @@ MesaSoftwareRenderer::MesaSoftwareRenderer(BGLView* view, ulong options,
 	const GLint blue = rgbFlag ? 8 : 0;
 	const GLint alpha = alphaFlag ? 8 : 0;
 
-	//fOptions = options | BGL_INDIRECT;
+	fOptions = options; // | BGL_INDIRECT;
 	struct dd_function_table functions;
 
 	fVisual = _mesa_create_visual(rgbFlag, dblFlag, stereoFlag, red, green,
@@ -253,6 +253,7 @@ MesaSoftwareRenderer::MesaSoftwareRenderer(BGLView* view, ulong options,
 	//functions.ClearColor 	= ClearColor;
 	functions.Error			= Error;
 	functions.Viewport      = Viewport;
+	functions.Flush		= Flush;
 
 	// create core context
 	fContext = _mesa_create_context(fVisual, NULL, &functions, this);
@@ -420,6 +421,9 @@ MesaSoftwareRenderer::UnlockGL()
 {
 	CALLED();
 	_mesa_make_current(fContext, NULL, NULL);
+	if ((fOptions & BGL_DOUBLE) == 0) {
+		SwapBuffers();
+	}
 	BGLRenderer::UnlockGL();
 }
 
@@ -771,3 +775,13 @@ MesaSoftwareRenderer::RenderbufferStorage(GLcontext* ctx,
 }
 
 
+void
+MesaSoftwareRenderer::Flush(GLcontext *ctx)
+{
+	CALLED();
+	MesaSoftwareRenderer *mr = (MesaSoftwareRenderer *) ctx->DriverCtx;
+	if ((mr->fOptions & BGL_DOUBLE) == 0) {
+		mr->SwapBuffers();
+	}
+}
+

src/add-ons/opengl/mesa_software_renderer/MesaSoftwareRenderer.h

@@ -58,11 +58,13 @@ private:
 									struct gl_renderbuffer* render,
 									GLenum internalFormat,
 									GLuint width, GLuint height);
+		static void			Flush(GLcontext *ctx);
 
 		BBitmap*				fBitmap;
 		bool					fDirectModeEnabled;
 		direct_buffer_info*			fInfo;
 		BLocker					fInfoLocker;
+		ulong					fOptions;
 
 		GLcontext*				fContext;
 		GLvisual*				fVisual;