X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=source%2Frenderbuffer.h;h=0ccf49675897c6b9864da27adb708eed45c458e8;hb=6dc2da27f0831d4172fcfeba4900616fd6c844b8;hp=b7320929f2f977c98fec344eee7a5ff3ded1bbc8;hpb=ceae2a27dfc58310c5bab7e3aa3fedf0fa9a1f49;p=libs%2Fgl.git

diff --git a/source/renderbuffer.h b/source/renderbuffer.h
index b7320929..0ccf4967 100644
--- a/source/renderbuffer.h
+++ b/source/renderbuffer.h
@@ -1,13 +1,7 @@
-/* $Id$
-
-This file is part of libmspgl
-Copyright © 2007  Mikko Rasa, Mikkosoft Productions
-Distributed under the LGPL
-*/
-
 #ifndef MSP_GL_RENDERBUFFER_H_
 #define MSP_GL_RENDERBUFFER_H_
 
+#include "bindable.h"
 #include "pixelformat.h"
 
 namespace Msp {
@@ -16,11 +10,13 @@ namespace GL {
 /**
 A Renderbuffer contains a single renderable image.  It can be attached to a
 Framebuffer to provide a logical buffer that is required to render the scene
-correctly but that is not needed as a texture later.
+correctly but that is not needed as a texture later.  Renderbuffers also
+provide a capability for multisampling, which is not available in textures.
 
-Requires the GL_EXT_framebuffer_object extension.
+Requires the GL_EXT_framebuffer_object extension.  Multisample renderbuffers
+additionally require the GL_EXT_framebuffer_multisample extension.
 */
-class Renderbuffer
+class Renderbuffer: public Bindable<Renderbuffer>
 {
 private:
 	unsigned id;
@@ -35,9 +31,22 @@ public:
 	unsigned get_width() const { return width; }
 	unsigned get_height() const { return height; }
 
+private:
+	static PixelFormat normalize_format(PixelFormat);
+
+public:
+	/** Allocates storage for the renderbuffer. */
+	void storage(PixelFormat fmt, unsigned wd, unsigned ht);
+
+	/** Allocates multisample storage for the renderbuffer.  All attachments in
+	a framebuffer must have the same number of samples.  To transfer the
+	contents to a texture for furter processing, use the framebuffer blit
+	functions.*/
+	void storage_multisample(unsigned samples, PixelFormat fmt, unsigned wd, unsigned ht);
+
 	void bind() const;
 
-	void storage(PixelFormat fmt, unsigned width, unsigned height);
+	static void unbind();
 };
 
 } // namespace GL