OpenGL: Implement VAOs

include/Nazara/OpenGLRenderer/Wrapper/ContextObject.inl

@@ -0,0 +1,88 @@
+// Copyright (C) 2020 Jérôme Leclercq
+// This file is part of the "Nazara Engine - OpenGL Renderer"
+// For conditions of distribution and use, see copyright notice in Config.hpp
+
+#include <Nazara/OpenGLRenderer/Wrapper/ContextObject.hpp>
+#include <Nazara/Core/Error.hpp>
+#include <Nazara/OpenGLRenderer/Utils.hpp>
+#include <Nazara/OpenGLRenderer/Debug.hpp>
+
+namespace Nz::GL
+{
+	template<typename C, GLenum ObjectType, typename... CreateArgs>
+	ContextObject<C, ObjectType, CreateArgs...>::~ContextObject()
+	{
+		Destroy();
+	}
+
+	template<typename C, GLenum ObjectType, typename... CreateArgs>
+	bool ContextObject<C, ObjectType, CreateArgs...>::Create(const Context& context, CreateArgs... args)
+	{
+		Destroy();
+
+		m_context = &context;
+
+		EnsureContext();
+
+		m_objectId = C::CreateHelper(*m_context, args...);
+		if (m_objectId == InvalidObject)
+		{
+			NazaraError("Failed to create OpenGL object"); //< TODO: Handle error message
+			return false;
+		}
+
+		return true;
+	}
+
+	template<typename C, GLenum ObjectType, typename... CreateArgs>
+	void ContextObject<C, ObjectType, CreateArgs...>::Destroy()
+	{
+		if (IsValid())
+		{
+			EnsureContext();
+
+			C::DestroyHelper(*m_context, m_objectId);
+			m_objectId = InvalidObject;
+		}
+	}
+
+	template<typename C, GLenum ObjectType, typename... CreateArgs>
+	bool ContextObject<C, ObjectType, CreateArgs...>::IsValid() const
+	{
+		return m_objectId != InvalidObject;
+	}
+
+	template<typename C, GLenum ObjectType, typename... CreateArgs>
+	const Context* ContextObject<C, ObjectType, CreateArgs...>::GetContext() const
+	{
+		return m_context.Get();
+	}
+
+	template<typename C, GLenum ObjectType, typename... CreateArgs>
+	GLuint ContextObject<C, ObjectType, CreateArgs...>::GetObjectId() const
+	{
+		return m_objectId;
+	}
+
+	template<typename C, GLenum ObjectType, typename... CreateArgs>
+	void ContextObject<C, ObjectType, CreateArgs...>::SetDebugName(const std::string_view& name)
+	{
+		EnsureContext();
+
+		if (m_context->glObjectLabel)
+			m_context->glObjectLabel(ObjectType, m_objectId, name.size(), name.data());
+	}
+
+	template<typename C, GLenum ObjectType, typename... CreateArgs>
+	void ContextObject<C, ObjectType, CreateArgs...>::EnsureContext()
+	{
+		const Context* activeContext = Context::GetCurrentContext();
+		if (activeContext != m_context.Get())
+		{
+			if (!Context::SetCurrentContext(m_context.Get()))
+				throw std::runtime_error("failed to activate context");
+		}
+	}
+}
+
+#include <Nazara/OpenGLRenderer/DebugOff.hpp>