From Marcus Hein, Added support for OpenGL SSBO and SSBB via osg::ShaderStorageBufferObject and osg::ShaderStorageBufferBinding to core OSG library, and added new osgSSBO example

git-svn-id: http://svn.openscenegraph.org/osg/OpenSceneGraph/trunk@14599 16af8721-9629-0410-8352-f15c8da7e697

src/osg/BufferIndexBinding.cpp

@@ -143,4 +143,26 @@ void AtomicCounterBufferBinding::readData(osg::State & state, osg::UIntArray & u
         bo->_extensions->glBindBuffer(GL_ATOMIC_COUNTER_BUFFER, static_cast<GLuint>(previousID));
 }
 
+
+ShaderStorageBufferBinding::ShaderStorageBufferBinding(GLuint index)
+    : BufferIndexBinding(GL_SHADER_STORAGE_BUFFER, index)
+{
+}
+
+ShaderStorageBufferBinding::ShaderStorageBufferBinding(GLuint index, BufferObject* bo, GLintptr offset, GLsizeiptr size)
+    : BufferIndexBinding(GL_SHADER_STORAGE_BUFFER, index, bo, offset, size)
+{
+
+}
+
+ShaderStorageBufferBinding::ShaderStorageBufferBinding(const ShaderStorageBufferBinding& rhs, const CopyOp& copyop)
+    : BufferIndexBinding(rhs, copyop)
+{
+}
+
+
+
+
+
+
 } // namespace osg

src/osg/BufferObject.cpp

@@ -1560,3 +1560,25 @@ AtomicCounterBufferObject::AtomicCounterBufferObject(const AtomicCounterBufferOb
 AtomicCounterBufferObject::~AtomicCounterBufferObject()
 {
 }
+
+
+//////////////////////////////////////////////////////////////////////////////////
+//
+//  ShaderStorageBufferObject
+//
+ShaderStorageBufferObject::ShaderStorageBufferObject()
+{
+    setTarget(GL_SHADER_STORAGE_BUFFER);
+    setUsage(GL_STATIC_DRAW);
+}
+
+ShaderStorageBufferObject::ShaderStorageBufferObject(const ShaderStorageBufferObject& ubo, const CopyOp& copyop)
+    : BufferObject(ubo, copyop)
+{
+}
+
+ShaderStorageBufferObject::~ShaderStorageBufferObject()
+{
+}
+
+