From: Mikko Rasa <tdb@tdb.fi>
Date: Tue, 18 Jun 2013 14:38:29 +0000 (+0300)
Subject: Render final pipeline output into the bound framebuffer
X-Git-Url: http://git.tdb.fi/?p=libs%2Fgl.git;a=commitdiff_plain;h=0119ca4f792dc761e5248b76de71f2844c0e3997

Render final pipeline output into the bound framebuffer
---

diff --git a/source/pipeline.cpp b/source/pipeline.cpp
index 59e6bbb8..c6260f0e 100644
--- a/source/pipeline.cpp
+++ b/source/pipeline.cpp
@@ -137,10 +137,14 @@ void Pipeline::render(Renderer &renderer, const Tag &tag) const
 	if(!in_frame)
 		setup_frame();
 
+	const Framebuffer *out_fbo = Framebuffer::current();
+	/* Binding the current object is a no-op, but this will restore the original
+	FBO in case an exception is thrown. */
+	Bind restore_fbo(out_fbo, true);
+
 	if(target[0])
 	{
 		Framebuffer &fbo = (samples ? target_ms->fbo : target[0]->fbo);
-		// XXX exception safety
 		fbo.bind();
 		fbo.clear(COLOR_BUFFER_BIT|DEPTH_BUFFER_BIT);
 	}
@@ -167,11 +171,11 @@ void Pipeline::render(Renderer &renderer, const Tag &tag) const
 			if(i+1<postproc.size())
 				target[1-j]->fbo.bind();
 			else
-				Framebuffer::unbind();
+				out_fbo->bind();
 			postproc[i]->render(target[j]->color, target[j]->depth);
 		}
 
-		Framebuffer::unbind();
+		out_fbo->bind();
 	}
 
 	if(!was_in_frame)