X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=source%2Fcore%2Frenderbuffer.h;fp=source%2Fcore%2Frenderbuffer.h;h=afc6ed204298a7bbcfe02d6c95a87af83c6a1bba;hb=7aaec9a70b8d7733429bec043f8e33e02956f266;hp=0000000000000000000000000000000000000000;hpb=bec07999d95b76f4b47cffcc564d0cd0afc0435e;p=libs%2Fgl.git

diff --git a/source/core/renderbuffer.h b/source/core/renderbuffer.h
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+++ b/source/core/renderbuffer.h
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+#ifndef MSP_GL_RENDERBUFFER_H_
+#define MSP_GL_RENDERBUFFER_H_
+
+#include "bindable.h"
+#include "pixelformat.h"
+
+namespace Msp {
+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.  Renderbuffers also
+provide a capability for multisampling, which is not available in textures.
+
+Requires the GL_EXT_framebuffer_object extension.  Multisample renderbuffers
+additionally require the GL_EXT_framebuffer_multisample extension.
+*/
+class Renderbuffer: public Bindable<Renderbuffer>
+{
+private:
+	unsigned id;
+	unsigned width;
+	unsigned height;
+
+public:
+	Renderbuffer();
+	~Renderbuffer();
+
+	unsigned get_id() const { return id; }
+	unsigned get_width() const { return width; }
+	unsigned get_height() const { return height; }
+
+	/** 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;
+
+	static void unbind();
+};
+
+} // namespace GL
+} // namespace Msp
+
+#endif