void VertexArrayBuffer::Build(ref_ptr<GpuProgram> program)
{
ASSERT(m_VAO == 0 && m_program == nullptr, ("No-no-no! You can't rebuild VertexArrayBuffer"));
m_program = program;
/// if OES_vertex_array_object not supported, than buffers will be bind on each Render call
if (!GLExtensionsList::Instance().IsSupported(GLExtensionsList::VertexArrayObject))
return;
if (m_staticBuffers.empty())
return;
m_VAO = GLFunctions::glGenVertexArray();
Bind();
BindStaticBuffers();
}
void VertexArrayBuffer::RenderRange(IndicesRange const & range)
{
if (!(m_staticBuffers.empty() && m_dynamicBuffers.empty()) && GetIndexCount() > 0)
{
ASSERT(m_program != nullptr, ("Somebody not call Build. It's very bad. Very very bad"));
/// if OES_vertex_array_object is supported than all bindings already saved in VAO
/// and we need only bind VAO. In Bind method have ASSERT("bind already called")
if (GLExtensionsList::Instance().IsSupported(GLExtensionsList::VertexArrayObject))
Bind();
else
BindStaticBuffers();
BindDynamicBuffers();
GetIndexBuffer()->Bind();
GLFunctions::glDrawElements(dp::IndexStorage::SizeOfIndex(), range.m_idxCount, range.m_idxStart);
}
}
void VertexArrayBuffer::Render()
{
if (!(m_staticBuffers.empty() && m_dynamicBuffers.empty()))
{
ASSERT(!m_program.IsNull(), ("Somebody not call Build. It's very bad. Very very bad"));
/// if OES_vertex_array_object is supported than all bindings already saved in VAO
/// and we need only bind VAO. In Bind method have ASSERT("bind already called")
if (GLExtensionsList::Instance().IsSupported(GLExtensionsList::VertexArrayObject))
Bind();
else
BindStaticBuffers();
BindDynamicBuffers();
m_indexBuffer->Bind();
GLFunctions::glDrawElements(m_indexBuffer->GetCurrentSize());
}
}
