From afcac59c7d04f4337d6b04ebed8cac7e871ccc50 Mon Sep 17 00:00:00 2001
From: rtk0c <mail.tianyig@gmail.com>
Date: Fri, 15 Apr 2022 20:30:39 -0700
Subject: Changeset: 7 Work on Material system

---
 source/Material.hpp | 61 ++++++++++++++++++++++++++++++++++++++++++++++-------
 1 file changed, 53 insertions(+), 8 deletions(-)

(limited to 'source/Material.hpp')

diff --git a/source/Material.hpp b/source/Material.hpp
index 6290a25..6b431be 100644
--- a/source/Material.hpp
+++ b/source/Material.hpp
@@ -1,5 +1,6 @@
 #pragma once
 
+#include "EditorAttachment.hpp"
 #include "RcPtr.hpp"
 #include "Shader.hpp"
 #include "Texture.hpp"
@@ -7,15 +8,18 @@
 #include <glad/glad.h>
 #include <cstddef>
 #include <cstdint>
+#include <filesystem>
 #include <glm/glm.hpp>
 #include <memory>
 #include <span>
 #include <string_view>
 #include <vector>
 
-// TODO support multiple sizes of vectors and matrices
+class MaterialManager;
 class Material : public RefCounted {
-public:
+public: // NOTE: public for internal helpers and editor
+	// NOTE: specialize between scalar vs matrix vs vector to save memory
+
 	struct ScalarUniform {
 		union {
 			float floatValue;
@@ -23,27 +27,33 @@ public:
 			uint32_t uintValue;
 		};
 		GLenum actualType;
-		GLint location;
+		/* Saves 'name' */ int infoUniformIndex;
+		/* Transient */ GLint location;
 	};
 
 	struct VectorUniform {
 		float value[4];
 		int actualLength;
-		GLint location;
+		/* Saves 'name' */ int infoUniformIndex;
+		/* Transient */ GLint location;
 	};
 
 	struct MatrixUniform {
 		float value[16];
 		int actualWidth;
 		int actualHeight;
-		GLint location;
+		/* Saves 'name' */ int infoUniformIndex;
+		/* Transient */ GLint location;
 	};
 
 	struct TextureUniform {
 		RcPtr<Texture> value;
-		GLint location;
+		/* Saves 'name' */ int infoUniformIndex;
+		/* Transient */ GLint location;
 	};
 
+	std::string mName;
+	std::unique_ptr<EditorAttachment> mEditorAttachment;
 	RcPtr<Shader> mShader;
 	std::vector<ScalarUniform> mBoundScalars;
 	std::vector<VectorUniform> mBoundVectors;
@@ -51,7 +61,9 @@ public:
 	std::vector<TextureUniform> mBoundTextures;
 
 public:
-	Material(Shader* shader);
+	// NOTE: constructs invalid object
+	Material() = default;
+	Material(Shader* shader, std::string name = "");
 
 	void SetFloat(const char* name, float value);
 	void SetInt(const char* name, int32_t value);
@@ -70,7 +82,40 @@ public:
 	std::span<const VectorUniform> GetVectors() const;
 	std::span<const MatrixUniform> GetMatrices() const;
 	std::span<const TextureUniform> GetTextures() const;
-	const Shader& GetShader() const;
+	Shader* GetShader() const;
+	void SetShader(Shader* shader);
+	const std::string& GetName() const;
+
+	bool IsAnnoymous() const;
+	bool IsValid() const;
 
 	void UseUniforms() const;
+
+	EditorAttachment* GetEditorAttachment() const { return mEditorAttachment.get(); }
+	void SetEditorAttachment(EditorAttachment* attachment) { mEditorAttachment.reset(attachment); }
+
+	void GetDesignatedPath(char* buffer, int bufferSize);
+	std::filesystem::path GetDesignatedPath();
+
+	bool SaveToFile(const std::filesystem::path& filePath) const;
+	bool LoadFromFile(const std::filesystem::path& filePath);
+};
+
+class MaterialManager {
+public:
+	static inline MaterialManager* instance = nullptr;
+
+private:
+	absl::flat_hash_map<std::string_view, RcPtr<Material>> mMaterials;
+
+public:
+	void DiscoverMaterials();
+
+	std::pair<Material*, bool> SaveMaterial(Material* mat);
+	void DeleteMaterial(Material* mat, bool onDisk = false);
+	Material* LoadMaterial(std::string_view name);
+	bool RenameMaterial(Material* mat, std::string newName);
+
+	const auto& GetMaterials() const { return mMaterials; }
+	Material* FindMaterial(std::string_view name);
 };
-- 
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