X-Git-Url: http://git.tdb.fi/?p=libs%2Fgl.git;a=blobdiff_plain;f=source%2Fframebuffer.h;h=9fe4cd8bd028f1d929ead4111ddcd8f11126d619;hp=ce36212528bb8ea5f2c5d9863fc61cb3ec810f73;hb=98c810b6d2256aa65986bbde12c38917678121bb;hpb=5658c6ea1a5caf1b408366cebf785f79d650ff53

diff --git a/source/framebuffer.h b/source/framebuffer.h
index ce362125..9fe4cd8b 100644
--- a/source/framebuffer.h
+++ b/source/framebuffer.h
@@ -8,6 +8,7 @@ Distributed under the LGPL
 #ifndef MSP_GL_FRAMEBUFFER_H_
 #define MSP_GL_FRAMEBUFFER_H_
 
+#include <vector>
 #include "gl.h"
 #include "types.h"
 
@@ -15,6 +16,7 @@ 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
@@ -53,9 +77,28 @@ Requires the GL_EXT_framebuffer_object extension.
 class Framebuffer
 {
 private:
+	struct Attachment
+	{
+		FramebufferAttachment attachment;
+		GLenum type;
+		union
+		{
+			Renderbuffer *rbuf;
+			Texture *tex;
+		};
+
+		Attachment(FramebufferAttachment);
+		Attachment &operator=(Renderbuffer &);
+		Attachment &operator=(Texture &);
+	};
+
 	uint id;
+	std::vector<Attachment> attachments;
+	unsigned width;
+	unsigned height;
 
 	static const Framebuffer *cur_fbo;
+	static int sys_viewport[4];
 
 public:
 	Framebuffer();
@@ -65,6 +108,7 @@ public:
 
 	void attach(FramebufferAttachment attch, Renderbuffer &rbuf);
 	void attach(FramebufferAttachment attch, Texture2D &tex, int level);
+	void detach(FramebufferAttachment attch);
 
 	/**
 	Checks the completeness status of the framebuffer.  Returns
@@ -77,8 +121,18 @@ public:
 	static void unbind();
 private:
 	void maybe_bind() const;
+	Attachment &get_or_create_attachment(FramebufferAttachment);
+	void check_size();
 };
 
+inline BufferBits operator|(BufferBits a, BufferBits b)
+{ return static_cast<BufferBits>(static_cast<int>(a)|static_cast<int>(b)); }
+
+void viewport(int, int, unsigned, unsigned);
+void clear(BufferBits);
+void draw_buffer(RWBuffer);
+void read_buffer(RWBuffer);
+
 } // namespace GL
 } // namespace Msp