X-Git-Url: http://git.tdb.fi/?p=libs%2Fgl.git;a=blobdiff_plain;f=source%2Fbufferable.h;h=cbbde4e1b93f1e07266c097c150774f2b5621d3c;hp=c8c9393caabe47176627be22891c3f0ccb0d04c1;hb=bec07999d95b76f4b47cffcc564d0cd0afc0435e;hpb=4d3d1511616a0ad4a91f8a068b49faf2b450c298

diff --git a/source/bufferable.h b/source/bufferable.h
index c8c9393c..cbbde4e1 100644
--- a/source/bufferable.h
+++ b/source/bufferable.h
@@ -14,15 +14,29 @@ uploading fresh data to the buffer.
 */
 class Bufferable
 {
+public:
+	class AsyncUpdater
+	{
+	private:
+		const Bufferable &bufferable;
+		char *mapped_address;
+
+	public:
+		AsyncUpdater(const Bufferable &);
+		~AsyncUpdater();
+
+		void upload_data();
+	};
+
 private:
 	Buffer *buffer;
 	unsigned offset;
 	Bufferable *next_in_buffer;
 	Bufferable *prev_in_buffer;
+	mutable bool location_dirty;
 protected:
 	mutable bool dirty;
 
-protected:
 	Bufferable();
 public:
 	virtual ~Bufferable();
@@ -31,19 +45,34 @@ public:
 	buffer, and this object is inserted after it. */
 	void use_buffer(Buffer *buf, Bufferable *prev = 0);
 
+	/** Sets the buffer for the entire chain of objects. */
+	void change_buffer(Buffer *);
+
+	/** Returns the total amount of storage required by this object and others
+	in the same chain, including any alignment between objects. */
+	unsigned get_required_buffer_size() const;
+
 	/** Uploads new data into the buffer if necessary. */
-	void refresh() const { if(dirty) update_buffer(); }
+	void refresh() const { if(buffer && dirty) upload_data(0); }
+
+	/** Returns an object which can be used to upload data to the buffer using
+	mapped memory. */
+	AsyncUpdater *refresh_async() const;
 
 private:
 	void unlink_from_buffer();
 
-protected:
+public:
 	/** Returns the buffer in which the data is stored. */
-	Buffer *get_buffer() const { return buffer; }
+	const Buffer *get_buffer() const { return buffer; }
 
+protected:
 	/** Returns the amount of data to be stored in the buffer, in bytes. */
 	virtual unsigned get_data_size() const = 0;
 
+	/** Returns a pointer to the start of data in client memory. */
+	virtual const void *get_data_pointer() const = 0;
+
 	/** Returns the alignment required for the data, in bytes.  The offset is
 	guaranteed to be a multiple of this. */
 	virtual unsigned get_alignment() const { return 1; }
@@ -56,14 +85,13 @@ protected:
 	/** Returns the offset where the data should be uploaded. */
 	unsigned get_offset() const { return offset; }
 
-	/** Called when the offset for the data has changed. */
-	virtual void offset_changed() { }
-
-	/** Resizes the buffer if necessary and calls upload_data(). */
-	void update_buffer() const;
+	/** Called when the target buffer or offset within it has changed. */
+	virtual void location_changed(Buffer *, unsigned, unsigned) const { }
 
-	/** Uploads data to the buffer. */
-	virtual void upload_data() const = 0;
+private:
+	/** Uploads data to the buffer.  Receives pointer to mapped buffer memory as
+	parameter, or null to use the buffer upload interface. */
+	void upload_data(char *) const;
 };
 
 } // namespace GL