From 92351f63c5061d2b0b96201390649662c2833388 Mon Sep 17 00:00:00 2001
From: Mikko Rasa <tdb@tdb.fi>
Date: Sun, 17 Aug 2014 18:23:30 +0300
Subject: [PATCH] Add memory-mapping functions for Buffer

---
 source/buffer.cpp | 12 ++++++++++++
 source/buffer.h   | 10 ++++++++++
 2 files changed, 22 insertions(+)

diff --git a/source/buffer.cpp b/source/buffer.cpp
index 9fa03c12..9edcf07d 100644
--- a/source/buffer.cpp
+++ b/source/buffer.cpp
@@ -61,6 +61,18 @@ BufferRange *Buffer::create_range(unsigned s, unsigned o)
 	return new BufferRange(*this, s, o);
 }
 
+void *Buffer::map(BufferAccess access)
+{
+	BindRestore _bind(this, type);
+	return glMapBuffer(type, access);
+}
+
+bool Buffer::unmap()
+{
+	BindRestore _bind(this, type);
+	return glUnmapBuffer(type);
+}
+
 void Buffer::bind_to(BufferType t) const
 {
 	if(t!=type)
diff --git a/source/buffer.h b/source/buffer.h
index a7d4c2ba..e43536e2 100644
--- a/source/buffer.h
+++ b/source/buffer.h
@@ -31,6 +31,13 @@ enum BufferUsage
 	DYNAMIC_COPY = GL_DYNAMIC_COPY
 };
 
+enum BufferAccess
+{
+	READ_ONLY = GL_READ_ONLY,
+	WRITE_ONLY = GL_WRITE_ONLY,
+	READ_WRITE = GL_READ_WRITE
+};
+
 class BufferRange;
 
 /**
@@ -80,6 +87,9 @@ public:
 
 	BufferRange *create_range(unsigned, unsigned);
 
+	void *map(BufferAccess);
+	bool unmap();
+
 	/** Binds the buffer in its default slot. */
 	void bind() const { bind_to(type); }
 
-- 
2.45.2