Add ArBackgroundDrawable

openVulkanoCpp/Scene/Prefabs/ArBackgroundDrawable.cpp

@@ -0,0 +1,64 @@
+/*
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ */
+
+#include "ArBackgroundDrawable.hpp"
+#include "AR/ArSession.hpp"
+#include "AR/ArFrame.hpp"
+#include "Base/Logger.hpp"
+
+namespace OpenVulkano::Scene
+{
+	ArBackgroundDrawable::ArBackgroundDrawable(const Ptr<AR::ArSession>& arSession)
+			: Drawable(DrawEncoder::GetDrawEncoder<ArBackgroundDrawable>(), DrawPhase::BACKGROUND)
+			, m_arSession(arSession)
+	{
+		m_shader.topology = Topology::TRIANGLE_STRIP;
+		m_shader.AddShaderProgram(ShaderProgramType::VERTEX, "Shader/background");
+		m_shader.AddShaderProgram(ShaderProgramType::FRAGMENT, "Shader/background");
+		//m_shader.AddDescriptorSetLayoutBinding(DESCRIPTOR_SET_LAYOUT_BINDING);
+		m_shader.AddDescriptorSetLayoutBinding(Texture::DESCRIPTOR_SET_LAYOUT_BINDING);
+		SetShader(&m_shader);
+		if (m_arSession)
+			m_arSession->OnNewFrame += EventHandler(this, &ArBackgroundDrawable::OnNewArFrame);
+	}
+
+	void ArBackgroundDrawable::Init(const Ptr<AR::ArSession>& arSession)
+	{
+		if (m_arSession)
+		{
+			if (m_arSession == arSession) return;
+			Close();
+		}
+		if (!arSession) return;
+		m_arSession = arSession;
+		m_arSession->OnNewFrame += EventHandler(this, &ArBackgroundDrawable::OnNewArFrame);
+	}
+
+	void ArBackgroundDrawable::Close()
+	{
+		m_arSession->OnNewFrame -= EventHandler(this, &ArBackgroundDrawable::OnNewArFrame);
+		m_nextFrame = nullptr;
+		Drawable::Close();
+	}
+
+	void ArBackgroundDrawable::OnNewArFrame(const Ptr<AR::ArFrame>& frame)
+	{
+		m_nextFrame = frame;
+	}
+
+	void ArBackgroundDrawable::Tick()
+	{
+		m_lastFrame = nullptr;
+		if (m_nextFrame)
+		{
+			m_lastFrame = std::move(m_currentFrame);
+			m_currentFrame = std::move(m_nextFrame);
+			m_nextFrame = nullptr;
+		}
+		if (m_currentFrame) m_texture = m_currentFrame->GetImageTexture();
+		if (!m_texture) m_texture = &Texture::PLACEHOLDER;
+	}
+}