X-Git-Url: http://git.tdb.fi/?p=libs%2Fgl.git;a=blobdiff_plain;f=source%2Frenderbuffer.h;h=751374bd4a4258f70ca9afa74d1e16bf543b49a3;hp=040dad44bfdbaf896194d1c9bdf9adf579d0b768;hb=9d1fa012a23693768bbe287371e97751c03acc50;hpb=98c810b6d2256aa65986bbde12c38917678121bb

diff --git a/source/renderbuffer.h b/source/renderbuffer.h
index 040dad44..751374bd 100644
--- a/source/renderbuffer.h
+++ b/source/renderbuffer.h
@@ -1,15 +1,8 @@
-/* $Id$
-
-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"
-#include "types.h"
 
 namespace Msp {
 namespace GL {
@@ -17,28 +10,47 @@ 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:
-	uint id;
-	sizei width;
-	sizei height;
+	unsigned id;
+	unsigned width;
+	unsigned height;
 
 public:
 	Renderbuffer();
 	~Renderbuffer();
 
-	uint get_id() const { return id; }
-	sizei get_width() const { return width; }
-	sizei get_height() const { return height; }
+	unsigned get_id() const { return id; }
+	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);
+
+	/** Returns the maximum supported sample count for multisampling.  If
+	multisampling is not supported, returns 0. */
+	static unsigned get_max_samples();
+
+	/** 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, sizei width, sizei height);
+	static void unbind();
 };
 
 } // namespace GL