X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=source%2Fframebuffer.h;h=89147b2c250cb265be3a7805cb927062499f1655;hb=483f28cfaff846f74fd49cb73b9f45fe843011fe;hp=437ac1afb79faeef5275df4d43403919c081cbba;hpb=a4ec5410595ddf37bfbc0e85ad87d31a9cbf94f1;p=libs%2Fgl.git

diff --git a/source/framebuffer.h b/source/framebuffer.h
index 437ac1af..89147b2c 100644
--- a/source/framebuffer.h
+++ b/source/framebuffer.h
@@ -8,13 +8,15 @@ Distributed under the LGPL
 #ifndef MSP_GL_FRAMEBUFFER_H_
 #define MSP_GL_FRAMEBUFFER_H_
 
+#include <vector>
+#include "bindable.h"
 #include "gl.h"
-#include "types.h"
 
 namespace Msp {
 namespace GL {
 
 class Renderbuffer;
+class Texture;
 class Texture2D;
 
 enum FramebufferAttachment
@@ -39,6 +41,28 @@ enum FramebufferStatus
 	FRAMEBUFFER_COMPLETE                      = GL_FRAMEBUFFER_COMPLETE_EXT
 };
 
+enum BufferBits
+{
+	COLOR_BUFFER_BIT   = GL_COLOR_BUFFER_BIT,
+	DEPTH_BUFFER_BIT   = GL_DEPTH_BUFFER_BIT,
+	STENCIL_BUFFER_BIT = GL_STENCIL_BUFFER_BIT,
+	ACCUM_BUFFER_BIT   = GL_ACCUM_BUFFER_BIT
+};
+
+enum RWBuffer
+{
+	NO_BUFFER      = GL_NONE,
+	FRONT_LEFT     = GL_FRONT_LEFT,
+	FRONT_RIGHT    = GL_FRONT_RIGHT,
+	BACK_LEFT      = GL_BACK_LEFT,
+	BACK_RIGHT     = GL_BACK_RIGHT,
+	FRONT          = GL_FRONT,
+	BACK           = GL_BACK,
+	LEFT           = GL_LEFT,
+	RIGHT          = GL_RIGHT,
+	FRONT_AND_BACK = GL_FRONT_AND_BACK
+};
+
 /**
 Framebuffer objects can be used to perform offscreen rendering.  The most
 common application is rendering to a texture, which can then be used for
@@ -50,21 +74,44 @@ least one image must be attached for the framebuffer to be usable.
 
 Requires the GL_EXT_framebuffer_object extension.
 */
-class Framebuffer
+class Framebuffer: public Bindable<Framebuffer>
 {
 private:
-	uint id;
-
-	static const Framebuffer *current;
-
+	struct Attachment
+	{
+		FramebufferAttachment attachment;
+		GLenum type;
+		union
+		{
+			Renderbuffer *rbuf;
+			Texture *tex;
+		};
+		unsigned level;
+
+		Attachment(FramebufferAttachment);
+		void set(Renderbuffer &);
+		void set(Texture &, unsigned);
+		void clear();
+	};
+
+	unsigned id;
+	std::vector<Attachment> attachments;
+	unsigned width;
+	unsigned height;
+	mutable unsigned dirty;
+
+	Framebuffer(unsigned);
 public:
 	Framebuffer();
 	~Framebuffer();
 
-	void bind() const;
-
+private:
+	void update_attachment(unsigned) const;
+	void check_size();
+public:
 	void attach(FramebufferAttachment attch, Renderbuffer &rbuf);
-	void attach(FramebufferAttachment attch, Texture2D &tex, int level);
+	void attach(FramebufferAttachment attch, Texture2D &tex, unsigned level);
+	void detach(FramebufferAttachment attch);
 
 	/**
 	Checks the completeness status of the framebuffer.  Returns
@@ -73,11 +120,21 @@ public:
 	*/
 	FramebufferStatus check_status() const;
 
+	void clear(BufferBits);
+
+	void bind() const;
+
+	static const Framebuffer *current();
 	static void unbind();
+
+	static Framebuffer &system();
 private:
-	void maybe_bind() const;
+	unsigned get_attachment_index(FramebufferAttachment);
 };
 
+inline BufferBits operator|(BufferBits a, BufferBits b)
+{ return static_cast<BufferBits>(static_cast<int>(a)|static_cast<int>(b)); }
+
 } // namespace GL
 } // namespace Msp