1 files changed, 92 insertions, 0 deletions
diff --git a/src/brussel.engine/Renderer.hpp b/src/brussel.engine/Renderer.hpp
new file mode 100644
index 0000000..856dc31
--- /dev/null
+++ b/src/brussel.engine/Renderer.hpp
@@ -0,0 +1,92 @@
+#pragma once
+
+#include "Camera.hpp"
+#include "Material.hpp"
+#include "VertexIndex.hpp"
+
+#include <RcPtr.hpp>
+
+#include <glad/glad.h>
+#include <rapidjson/fwd.h>
+#include <cstddef>
+#include <glm/glm.hpp>
+
+// TODO add optional support for OpenGL separate attrib binding & only depend on vertex format
+
+class GameObject;
+
+class RenderObject {
+public:
+	RcPtr<Texture> autofill_TextureAtlas;
+
+private:
+	RcPtr<Material> mMaterial;
+	RcPtr<GpuIndexBuffer> mIndexBuf;
+	RcPtr<VertexFormat> mVertexFormat;
+	BufferBindings mVertexBufBinding;
+	GLuint mVao;
+
+public:
+	RenderObject();
+	~RenderObject();
+
+	GLuint GetGLVao() const;
+	void RebuildIfNecessary();
+
+	Material* GetMaterial() const { return mMaterial.Get(); }
+	void SetMaterial(Material* material);
+
+	GpuIndexBuffer* GetIndexBuffer() const { return mIndexBuf.Get(); }
+	const VertexFormat* GetVertexFormat() const { return mVertexFormat.Get(); }
+	const BufferBindings& GetVertexBufferBindings() const { return mVertexBufBinding; }
+	void UpdateIndexBuffer(GpuIndexBuffer* indexBuffer);
+	void UpdateVertexFormat(VertexFormat* vertexFormat);
+	// Assumes the fetched BufferBinding object is modified
+	void UpdateVertexBufferBindings(BufferBindings** bindingsOut);
+	void SetFormat(VertexFormat* vertexFormat, Tags::IndexType indexFormat);
+
+private:
+	void DeleteGLObjects();
+};
+
+struct RendererFrameInfo {
+	Camera* camera;
+	glm::mat4 matrixView;
+	glm::mat4 matrixProj;
+	float time;
+	float deltaTime;
+};
+
+class Renderer {
+public:
+	// NOTE: see Renderer constructor for default values
+	enum RenderOption {
+		/// Render everything directly using objects' provided material and vertex/index data.
+		RO_Shading,
+		/// Render everything as wireframes using provided position data.
+		RO_Wireframe,
+		RO_COUNT,
+	};
+
+public:
+	RcPtr<Material> binding_WireframeMaterial;
+
+private:
+	RendererFrameInfo mFrame;
+	bool mInsideFrame = false;
+	bool mRenderOptions[RO_COUNT] = {};
+
+public:
+	Renderer();
+
+	void LoadBindings(const rapidjson::Value& bindings);
+	void SaveBindings(rapidjson::Value& into, rapidjson::Document& root) const;
+
+	void BeginFrame(Camera& camera, float currentTime, float deltaTime);
+	const RendererFrameInfo& GetLastFrameInfo() const { return mFrame; }
+	void Draw(const RenderObject* objects, const GameObject* gameObject, size_t count);
+	void EndFrame();
+
+	bool GetRenderOption(RenderOption option) const;
+	void SetRenderOption(RenderOption option, bool flag);
+};