From 2c92e07f337e42cf58970443f9de678f85a9b2a4 Mon Sep 17 00:00:00 2001
From: rtk0c <mail.tianyig@gmail.com>
Date: Thu, 19 Oct 2023 22:50:07 -0700
Subject: The great renaming: switch to "module style"

---
 src/brussel.engine/Material.hpp | 125 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 125 insertions(+)
 create mode 100644 src/brussel.engine/Material.hpp

(limited to 'src/brussel.engine/Material.hpp')

diff --git a/src/brussel.engine/Material.hpp b/src/brussel.engine/Material.hpp
new file mode 100644
index 0000000..f1cd7dd
--- /dev/null
+++ b/src/brussel.engine/Material.hpp
@@ -0,0 +1,125 @@
+#pragma once
+
+#include "Ires.hpp"
+#include "RcPtr.hpp"
+#include "Shader.hpp"
+#include "Texture.hpp"
+
+#include <glad/glad.h>
+#include <robin_hood.h>
+#include <cstddef>
+#include <cstdint>
+#include <glm/glm.hpp>
+#include <memory>
+#include <span>
+#include <string_view>
+#include <vector>
+
+// Forward declarations
+class Material;
+class IresMaterial;
+
+class Material : public RefCounted {
+	friend class IresMaterial;
+
+public:
+	// NOTE: specialize between scalar vs matrix vs vector to save memory
+
+	enum UniformType : uint16_t {
+		UT_Scalar,
+		UT_Vector,
+		UT_Matrix,
+	};
+
+	struct UniformIndex {
+		UniformType type;
+		uint16_t index;
+	};
+
+	struct ScalarUniform {
+		union {
+			float floatValue;
+			int32_t intValue;
+			uint32_t uintValue;
+		};
+		GLenum actualType;
+		/* Transient */ int infoUniformIndex;
+		/* Transient */ GLint location;
+	};
+
+	struct VectorUniform {
+		float value[4];
+		int actualLength;
+		/* Transient */ int infoUniformIndex;
+		/* Transient */ GLint location;
+	};
+
+	struct MatrixUniform {
+		float value[16];
+		int actualWidth;
+		int actualHeight;
+		/* Transient */ int infoUniformIndex;
+		/* Transient */ GLint location;
+	};
+
+	struct TextureUniform {
+		RcPtr<Texture> value;
+		/* Transient */ int infoUniformIndex;
+		/* Transient */ GLint location;
+	};
+
+	IresMaterial* mIres = nullptr;
+	RcPtr<Shader> mShader;
+	std::vector<ScalarUniform> mBoundScalars;
+	std::vector<VectorUniform> mBoundVectors;
+	std::vector<MatrixUniform> mBoundMatrices;
+	std::vector<TextureUniform> mBoundTextures;
+
+public:
+	Material();
+
+	void SetFloat(const char* name, float value);
+	void SetInt(const char* name, int32_t value);
+	void SetUInt(const char* name, uint32_t value);
+
+	/// Instanciated for length == 1, 2, 3, 4
+	template <int length>
+	void SetVector(const char* name, const glm::vec<length, float>& vec);
+
+	/// Instanciated for sizes (2,2) (3,3) (4,4) (2,3) (3,2) (2,4) (4,2) (3,4) (4,3)
+	template <int width, int height>
+	void SetMatrix(const char* name, const glm::mat<width, height, float>& mat);
+
+	void SetTexture(const char* name, Texture* texture);
+
+	std::span<const VectorUniform> GetVectors() const;
+	std::span<const MatrixUniform> GetMatrices() const;
+	std::span<const TextureUniform> GetTextures() const;
+	Shader* GetShader() const;
+	void SetShader(Shader* shader);
+
+	IresMaterial* GetIres() const { return mIres; }
+
+	bool IsValid() const;
+
+	void UseUniforms() const;
+};
+
+// Initialized in main()
+inline RcPtr<Material> gDefaultMaterial;
+
+class IresMaterial : public IresObject {
+private:
+	RcPtr<Material> mInstance;
+
+public:
+	IresMaterial();
+
+	Material* GetInstance() const;
+	void InvalidateInstance();
+
+	void ShowEditor(IEditor& editor) override;
+
+	void Write(IresWritingContext& ctx, rapidjson::Value& value, rapidjson::Document& root) const override;
+	void Read(IresLoadingContext& ctx, const rapidjson::Value& value) override;
+};
-- 
cgit v1.2.3-70-g09d2