X-Git-Url: http://git.tdb.fi/?p=libs%2Fgl.git;a=blobdiff_plain;f=source%2Fbuffer.cpp;h=56705b8701b88a00b691bf25725d10042554679a;hp=4b485ddad6cb266d1d96d2e844c40583cb9ace3a;hb=bec07999d95b76f4b47cffcc564d0cd0afc0435e;hpb=f3ee640033ec6367915b51a3beaf2330f39d75ac

diff --git a/source/buffer.cpp b/source/buffer.cpp
index 4b485dda..56705b87 100644
--- a/source/buffer.cpp
+++ b/source/buffer.cpp
@@ -1,6 +1,8 @@
 #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>
 #include "buffer.h"
 #include "error.h"
 #include "misc.h"
@@ -16,7 +18,6 @@ BufferType buffer_types[] = { ARRAY_BUFFER, ELEMENT_ARRAY_BUFFER, PIXEL_PACK_BUF
 
 Buffer::Buffer(BufferType t):
 	type(t),
-	usage(STATIC_DRAW),
 	size(0)
 {
 	require_buffer_type(type);
@@ -44,22 +45,56 @@ void Buffer::require_buffer_type(BufferType type)
 		static Require _req_ubo(ARB_uniform_buffer_object);
 }
 
-void Buffer::set_usage(BufferUsage u)
+void Buffer::storage(unsigned sz)
 {
-	// TODO OpenGL ES 2.0 doesn't support read or copy usages
-	usage = u;
+	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::data(unsigned sz, const void *d)
+void Buffer::set_usage(BufferUsage)
+{
+}
+
+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, STATIC_DRAW);
 	else
 	{
 		BindRestore _bind(this, type);
-		glBufferData(type, sz, d, usage);
+		glBufferData(type, size, d, STATIC_DRAW);
 	}
-	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)
@@ -73,36 +108,35 @@ void Buffer::sub_data(unsigned off, unsigned sz, const void *d)
 	}
 }
 
+void Buffer::require_size(unsigned req_sz) const
+{
+	if(size<req_sz)
+		throw buffer_too_small(format("buffer has %d bytes; %d required", size, req_sz));
+}
+
 BufferRange *Buffer::create_range(unsigned s, unsigned o)
 {
 	return new BufferRange(*this, s, o);
 }
 
-void *Buffer::map(BufferAccess access)
+void *Buffer::map()
 {
 	if(ARB_map_buffer_range)
 	{
-		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;
 		if(ARB_direct_state_access)
-			return glMapNamedBufferRange(id, 0, size, access_bits);
+			return glMapNamedBufferRange(id, 0, size, GL_MAP_READ_BIT|GL_MAP_WRITE_BIT);
 		else
 		{
 			BindRestore _bind(this, type);
-			return glMapBufferRange(type, 0, size, access_bits);
+			return glMapBufferRange(type, 0, size, GL_MAP_READ_BIT|GL_MAP_WRITE_BIT);
 		}
 	}
 	else if(ARB_direct_state_access)
-		return glMapNamedBuffer(id, access);
+		return glMapNamedBuffer(id, GL_READ_WRITE);
 	else if(OES_mapbuffer)
 	{
 		BindRestore _bind(this, type);
-		return glMapBuffer(type, access);
+		return glMapBuffer(type, GL_READ_WRITE);
 	}
 	else
 		throw invalid_operation("Buffer::map");