X-Git-Url: http://git.tdb.fi/?p=libs%2Fgl.git;a=blobdiff_plain;f=source%2Fcore%2Fframebuffer.h;h=d2029022d94b6fee2d0380d43a18dbff90338a63;hp=da828bf531f7c70eafc74d297712266fed97fa37;hb=959efbf61663efd7879070ce0447e02c8a447ce0;hpb=acaefb4c669f01855252818ef0a2958cbdababc3

diff --git a/source/core/framebuffer.h b/source/core/framebuffer.h
index da828bf5..d2029022 100644
--- a/source/core/framebuffer.h
+++ b/source/core/framebuffer.h
@@ -3,6 +3,7 @@
 
 #include <vector>
 #include "color.h"
+#include "framebuffer_backend.h"
 #include "frameformat.h"
 #include "texturecube.h"
 
@@ -22,43 +23,35 @@ public:
 };
 
 /**
-Framebuffer objects can be used to perform offscreen rendering.  The most
-common application is rendering to a texture, which can then be used for
-fullscreen shader effects.
+Uses one or more textures as buffers to draw into.  Framebuffers can contain
+multiple color buffers to match multiple outputs from a fragment shader, but
+only one depth and stencil buffer.
 
-A framebuffer consist of a number of logical buffers, such as color and depth
-buffers.  Textures can be attached to the logical buffers.  At least one image
-must be attached for the framebuffer to be usable.
-
-Requires the GL_EXT_framebuffer_object extension.  The blit functions require
-the GL_EXT_framebuffer_blit extension.
+RenderTarget provides a higher-level interface which manages the textures as
+well as the framebuffer itself.
 */
-class Framebuffer
+class Framebuffer: public FramebufferBackend
 {
-	friend class Commands;
-	friend class PipelineState;
+	friend FramebufferBackend;
 
 private:
 	struct Attachment
 	{
-		Texture *tex;
-		unsigned level;
-		int layer;
+		Texture *tex = 0;
+		unsigned level = 0;
+		int layer = 0;
 
-		Attachment();
 		void set(Texture &, unsigned, int);
 		void clear();
 	};
 
-	unsigned id;
 	FrameFormat format;
 	std::vector<Attachment> attachments;
 	unsigned width;
 	unsigned height;
-	mutable unsigned status;
 	mutable unsigned dirty;
 
-	Framebuffer(unsigned);
+	Framebuffer(bool);
 public:
 	/** Creates an empty framebuffer.  Format must be set before textures can
 	be attached. */
@@ -70,11 +63,6 @@ public:
 	/** Creates a framebuffer and sets its format. */
 	Framebuffer(const FrameFormat &);
 
-private:
-	void init();
-public:
-	~Framebuffer();
-
 	/** Sets the format of the framebuffer.  Once the format is set, it can't
 	be changed. */
 	void set_format(const FrameFormat &);
@@ -88,19 +76,27 @@ private:
 	void update() const;
 	void check_size();
 	void set_attachment(FrameAttachment, Texture &, unsigned, int, unsigned);
-public:
 
+public:
 	/** Attaches a texture to the framebuffer.  Only the attachment point
 	portion of attch is considered; pixel format is ignored.  The framebuffer
 	must have a format and the format of the texture must match that defined
 	in the framebuffer for this attachment point. */
-	void attach(FrameAttachment attch, Texture2D &tex, unsigned level = 0);
+	void attach(FrameAttachment attch, Texture2D &, unsigned level = 0);
+
+	void attach(FrameAttachment attch, Texture2DMultisample &);
+
+	/** Attaches a single layer from a 3-dimensional texture to the
+	framebuffer. */
+	void attach(FrameAttachment attch, Texture3D &, unsigned layer, unsigned level = 0);
+
+	void attach(FrameAttachment attch, TextureCube &, TextureCubeFace face, unsigned level = 0);
+
+	/** Attaches a layered texture to the framebuffer.  Shaders can direct
+	output to a particular layer. */
+	void attach_layered(FrameAttachment attch, Texture3D &, unsigned level = 0);
 
-	void attach(FrameAttachment attch, Texture2DMultisample &tex);
-	void attach(FrameAttachment attch, Texture3D &tex, unsigned layer, unsigned level = 0);
-	void attach(FrameAttachment attch, TextureCube &tex, TextureCubeFace face, unsigned level = 0);
-	void attach_layered(FrameAttachment attch, Texture3D &tex, unsigned level = 0);
-	void attach_layered(FrameAttachment attch, TextureCube &tex, unsigned level = 0);
+	void attach_layered(FrameAttachment attch, TextureCube &, unsigned level = 0);
 	void detach(FrameAttachment attch);
 
 	void resize(const WindowView &);
@@ -111,7 +107,7 @@ public:
 
 	void refresh() const { if(dirty) update(); }
 
-	void set_debug_name(const std::string &);
+	using FramebufferBackend::set_debug_name;
 
 	static Framebuffer &system();
 };