X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;ds=sidebyside;f=source%2Fbuffer.cpp;fp=source%2Fbuffer.cpp;h=46afb273deacde9611ce29801de2684809f1927f;hb=66181b3f47322ffc9b8aebf04a8c222abe1a75a2;hp=35975f1712ed2973c10a926d55812a9efb1c2f3c;hpb=ffe1debbd757d20f7250fd8572c2c46cd901f559;p=libs%2Fgl.git

diff --git a/source/buffer.cpp b/source/buffer.cpp
index 35975f17..46afb273 100644
--- a/source/buffer.cpp
+++ b/source/buffer.cpp
@@ -1,4 +1,5 @@
 #include <stdexcept>
+#include <msp/gl/extensions/arb_buffer_storage.h>
 #include <msp/gl/extensions/arb_direct_state_access.h>
 #include <msp/gl/extensions/arb_map_buffer_range.h>
 #include <msp/strings/format.h>
@@ -45,22 +46,58 @@ void Buffer::require_buffer_type(BufferType type)
 		static Require _req_ubo(ARB_uniform_buffer_object);
 }
 
+void Buffer::storage(unsigned sz)
+{
+	if(size>0)
+		throw invalid_operation("Buffer::storage");
+	if(sz==0)
+		throw invalid_argument("Buffer::storage");
+
+	size = sz;
+	if(ARB_buffer_storage)
+	{
+		static const int flags = GL_MAP_READ_BIT|GL_MAP_WRITE_BIT|GL_DYNAMIC_STORAGE_BIT;
+		if(ARB_direct_state_access)
+			glNamedBufferStorage(id, size, 0, flags);
+		else
+		{
+			BindRestore _bind(this, type);
+			glBufferStorage(type, size, 0, flags);
+		}
+	}
+}
+
 void Buffer::set_usage(BufferUsage u)
 {
 	// TODO OpenGL ES 2.0 doesn't support read or copy usages
 	usage = u;
 }
 
-void Buffer::data(unsigned sz, const void *d)
+void Buffer::data(const void *d)
 {
+	if(size==0)
+		throw invalid_operation("Buffer::data");
+
+	if(ARB_buffer_storage)
+		return sub_data(0, size, d);
+
 	if(ARB_direct_state_access)
-		glNamedBufferData(id, sz, d, usage);
+		glNamedBufferData(id, size, d, usage);
 	else
 	{
 		BindRestore _bind(this, type);
-		glBufferData(type, sz, d, usage);
+		glBufferData(type, size, d, usage);
 	}
-	size = sz;
+}
+
+void Buffer::data(unsigned sz, const void *d)
+{
+	if(size==0)
+		storage(sz);
+	else if(sz!=size)
+		throw incompatible_data("Buffer::data");
+
+	data(d);
 }
 
 void Buffer::sub_data(unsigned off, unsigned sz, const void *d)