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#pragma once
#include "EditorAttachment.hpp"
#include "RcPtr.hpp"
#include "Shader.hpp"
#include "Texture.hpp"
#include <glad/glad.h>
#include <cstddef>
#include <cstdint>
#include <filesystem>
#include <glm/glm.hpp>
#include <memory>
#include <span>
#include <string_view>
#include <vector>
class MaterialManager;
class Material : public RefCounted {
public: // NOTE: public for internal helpers and editor
// NOTE: specialize between scalar vs matrix vs vector to save memory
struct ScalarUniform {
union {
float floatValue;
int32_t intValue;
uint32_t uintValue;
};
GLenum actualType;
/* Saves 'name' */ int infoUniformIndex;
/* Transient */ GLint location;
};
struct VectorUniform {
float value[4];
int actualLength;
/* Saves 'name' */ int infoUniformIndex;
/* Transient */ GLint location;
};
struct MatrixUniform {
float value[16];
int actualWidth;
int actualHeight;
/* Saves 'name' */ int infoUniformIndex;
/* Transient */ GLint location;
};
struct TextureUniform {
RcPtr<Texture> value;
/* 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;
std::vector<MatrixUniform> mBoundMatrices;
std::vector<TextureUniform> mBoundTextures;
public:
// 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);
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);
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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