X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=source%2Fbuffer.cpp;h=080c3fb380dc6dbf605e3a843b5ffb1e9a2851ba;hb=4a6c595b4d954b6cf69c6388a43b2b66f84d8c0a;hp=1226dbe3223f41e438ddcc7ca1c2f9b107b0fd17;hpb=57de40e1e802e44ae5b4caa67b0bb8763828b5c3;p=libs%2Fgl.git

diff --git a/source/buffer.cpp b/source/buffer.cpp
index 1226dbe3..080c3fb3 100644
--- a/source/buffer.cpp
+++ b/source/buffer.cpp
@@ -1,4 +1,5 @@
 #include <stdexcept>
+#include <msp/gl/extensions/arb_map_buffer_range.h>
 #include "buffer.h"
 #include "error.h"
 #include "mesh.h"
@@ -64,8 +65,23 @@ BufferRange *Buffer::create_range(unsigned s, unsigned o)
 
 void *Buffer::map(BufferAccess access)
 {
-	BindRestore _bind(this, type);
-	return glMapBuffer(type, access);
+	if(ARB_map_buffer_range)
+	{
+		BindRestore _bind(this, type);
+		GLenum access_bits = 0;
+		if(access==READ_ONLY)
+			access_bits = GL_MAP_READ_BIT;
+		else if(access==WRITE_ONLY)
+			access_bits = GL_MAP_WRITE_BIT;
+		else if(access==READ_WRITE)
+			access_bits = GL_MAP_READ_BIT|GL_MAP_WRITE_BIT;
+		return glMapBufferRange(type, 0, size, access_bits);
+	}
+	else
+	{
+		BindRestore _bind(this, type);
+		return glMapBuffer(type, access);
+	}
 }
 
 bool Buffer::unmap()