X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=source%2Fframebuffer.cpp;h=98722195e32e8b10d40a43ab3d458d4c1ae5f4af;hb=e1df3aa732d4d2d03f6ac72a8dead099937a0468;hp=43b0f94b82e4c882327ef686491453a1bc7cf263;hpb=6afbace895a7bbcf216ab8e48280ea0303ab5892;p=libs%2Fgl.git

diff --git a/source/framebuffer.cpp b/source/framebuffer.cpp
index 43b0f94b..98722195 100644
--- a/source/framebuffer.cpp
+++ b/source/framebuffer.cpp
@@ -1,3 +1,4 @@
+#include "arb_draw_buffers.h"
 #include "error.h"
 #include "ext_framebuffer_blit.h"
 #include "ext_framebuffer_object.h"
@@ -46,7 +47,8 @@ void Framebuffer::update_attachment(unsigned mask) const
 {
 	if(current()==this)
 	{
-		GLenum color_buf = GL_NONE;
+		std::vector<GLenum> color_bufs;
+		color_bufs.reserve(attachments.size());
 		for(unsigned i=0; i<attachments.size(); ++i)
 		{
 			const Attachment &attch = attachments[i];
@@ -69,10 +71,18 @@ void Framebuffer::update_attachment(unsigned mask) const
 			}
 
 			if(attch.attachment>=COLOR_ATTACHMENT0 && attch.attachment<=COLOR_ATTACHMENT3)
-				color_buf = attch.attachment;
+				color_bufs.push_back(attch.attachment);
 		}
 
-		glDrawBuffer(color_buf);
+		if(color_bufs.empty())
+			glDrawBuffer(GL_NONE);
+		else if(color_bufs.size()==1)
+			glDrawBuffer(color_bufs.front());
+		else
+		{
+			static Require _req(ARB_draw_buffers);
+			glDrawBuffers(color_bufs.size(), &color_bufs[0]);
+		}
 	}
 	else
 		dirty |= mask;