Huge graphics overhaul

engine/NBGraphics/Buffers.hpp

@@ -5,361 +5,213 @@
 #include "GLLoad.hpp"
 
 #include <string>
-#include <vector>
 
 #include <NBCore/Errors.hpp>
-#include <NBCore/Types.hpp>
+#include <NBCore/Logger.hpp>
+#include <NBCore/Utils.hpp>
+
+#include "OGLObjects.hpp"
 
 namespace nb {
 
-typedef std::vector<unsigned char> RawVec;
+extern const std::unordered_map<GLenum, std::string> BufferTypes;
-
-static uint8_t GLSLTypeSize(GLenum type) {
-    switch(type) {
-    case GL_SHORT:
-    case GL_UNSIGNED_SHORT:
-    case GL_HALF_FLOAT:
-        return 2;
-        break;
-    case GL_INT:
-    case GL_UNSIGNED_INT:
-    case GL_FLOAT:
-        return 4;
-        break;
-    case GL_DOUBLE:
-        return 8;
-        break;
-    default:
-        return 1;
-        break;
-    }
-}
-
-struct VertexAttributePointer {
-    GLuint buffer = 0;
-    int32_t offset = 0;
-    GLsizei stride = -1;
-    GLuint divisor = 0;
-};
-
-struct VertexAttribute {
-    GLint GLSLSize;
-    GLenum GLSLType;
-    GLboolean GLSLNormalization;
-    VertexAttributePointer ptr;
-};
-
-static bool isIndexInVertexAttribute(int i, const VertexAttribute& va) {
-    if ((i -= va.ptr.offset) < 0) { return false; }
-    return (i%va.ptr.stride) < GLSLTypeSize(va.GLSLType) * va.GLSLSize;
-}
-
-typedef std::vector<VertexAttribute> VertexAttributeList;
 
+template<GLenum N>
+struct GLSLEnum;
 template<typename T>
-RawVec vectorToRaw(const std::vector<T>& vec) {
+struct GLSLType;
-    unsigned int num_bytes = vec.size() * sizeof(T);
-    RawVec ret(num_bytes);
-    memcpy(ret.data(), vec.data(), num_bytes);
-    return ret;
-}
 
-template<typename T, typename S>
+#define GLSLTypeTraits(type_, size_, value_) \
-RawVec concatVectorsToRaw(const std::vector<T>& vec1, const std::vector<S>& vec2) {
+template<>\
-    RawVec vec1_raw = vectorToRaw<T>(vec1);
+struct GLSLEnum<value_> {\
-    RawVec vec2_raw = vectorToRaw<S>(vec2);
+    using type = type_;\
-    unsigned int vec1_raw_size = vec1_raw.size();
+    static constexpr size_t size = size_;\
-    unsigned int vec2_raw_size = vec2_raw.size();
+    static constexpr GLenum value=value_;\
-    RawVec ret(vec1_raw_size + vec2_raw_size);
+};\
-    memcpy(ret.data(), vec1_raw.data(), vec1_raw_size);
+template<>\
-    memcpy(ret.data() + vec1_raw_size, vec2_raw.data(), vec2_raw_size);
+struct GLSLType<type_> {\
-    return ret;
+    using type = type_;\
-}
+    static constexpr size_t size = size_;\
-
+    static constexpr GLenum value=value_;\
-template<typename T>
-std::vector<T> rawToVector(const RawVec& vec) {
-    if (vec.size() % sizeof(T) != 0) {
-        throw std::runtime_error("Data size does not align to std::vector<" + std::string(typeid(T).name()) + ">.");
-    }
-    unsigned int num_elmts = vec.size() / sizeof(T);
-    std::vector<T> ret(num_elmts);
-    memcpy(ret.data(), vec.data(), vec.size());
-
-    return ret;
-}
-
-class BufferError : public std::runtime_error {
-public:
-    const bool error;
-    BufferError(const std::string& msg, const std::string& file="", int line=-1) 
-        : std::runtime_error(NB::formatDebugString(msg, file, line)), error(true) {}
-    BufferError(bool isError=true) : std::runtime_error(""), error(isError) {}
 };
 
+#define GLSLTypeEquivalence(original, newtype) \
+template<>\
+struct GLSLType<newtype> : public GLSLType<original> {};
 
-template <typename ObjectType>
+GLSLTypeTraits(uint8_t, 1, GL_UNSIGNED_BYTE);
-class OpenGLObject {
+GLSLTypeTraits(uint16_t, 2, GL_UNSIGNED_SHORT);
-public:
+GLSLTypeTraits(uint32_t, 4, GL_UNSIGNED_INT);
-    OpenGLObject(OpenGLObject&&) = default;
+GLSLTypeTraits(int8_t, 1, GL_BYTE);
-    OpenGLObject& operator=(OpenGLObject&&) = default;
+GLSLTypeTraits(int16_t, 2, GL_SHORT);
-    ~OpenGLObject() { remove(); }
+GLSLTypeTraits(int32_t, 4, GL_INT);
-    
+GLSLTypeTraits(float, 4, GL_FLOAT);
-    virtual void bind() const = 0;
+GLSLTypeTraits(double, 8, GL_DOUBLE);
-    virtual void unbind() const = 0;
-    virtual bool isInitialized() const = 0;
-    GLuint id() const { return _id; }
 
+class BufferError : public Error<BufferError> {
     protected:
-    OpenGLObject() = default;
+    using Base = Error<BufferError>;
-    OpenGLObject(const OpenGLObject&) = delete;
-    OpenGLObject& operator=(const OpenGLObject&) = delete;
     
-    virtual void remove() const = 0;
-
-    GLuint _id;
-};
-
-class VAO : public virtual OpenGLObject<VAO> {
     public:
-    using Base = OpenGLObject<VAO>;
     using Base::Base;
-
+    enum Codes : unsigned int {
-    VAO() { glGenVertexArrays(1, &_id); }
+        UNDEFINED,
-
+        DATA_OVERFLOW,
-    void bind() const { glBindVertexArray(_id); }
+        DATA_ERROR
-    void unbind() const { glBindVertexArray(0); }
+    };
-
+    static const std::string type;
-
+    static const ErrorCodeMap ErrorMessages;
-protected:
-    using Base::_id;
-    const 
-
-    void remove() { glDeleteVertexArrays(1, &_id); }
-
 };
 
-template <typename BufferType>
-class Buffer : public virtual OpenGLObject<Buffer<BufferType>> {
-public:
-    using Base = OpenGLObject<Buffer>;
-    using Base::Base;
-    
-    Buffer(GLenum usage_ = GL_STATIC_DRAW) : usage(usage_) { glGenBuffers(1,  &_id); }
-
-    void bind() const { glBindBuffer(GLTarget, _id); }
-    void unbind() const { glBindBuffer(GLTarget, 0); }
-    void data(void* data_, size_t size) const { glBufferData(GLTarget, size, data_, usage); }
-    void data(nb::ByteVector& data_) const { glBufferData(GLTarget, data_.size(), data_.data(), usage); }
-    void invalidate() const { glInvalidateBufferData(_id); }
-
-
-    const GLenum GLTarget = BufferType::GLTarget;
-    GLenum usage;
-
-protected:
-    using Base::_id;
-    void remove() { glDeleteBuffers(1, &_id); }
-
-};
-
-class VertexBuffer : public virtual Buffer<VertexBuffer> {
-public:
-
-    static const GLenum GLTarget = GL_ARRAY_BUFFER;
-protected:
-
-};
-
-class ElementBuffer : public virtual Buffer<ElementBuffer> {
-public:
-
-    static const GLenum GLTarget = GL_ELEMENT_ARRAY_BUFFER;
-
-protected:
-
-};
-
-/*
 class Buffer : public OpenGLObject {
-public:
+    protected:
-    Buffer(
+    using Codes = BufferError::Codes;
-        GLenum buffer_type,
+    using OpenGLObject::_id;
-        GLenum usage=GL_STATIC_DRAW
+    GLenum _usage = GL_STATIC_DRAW;
-    ) : _type(buffer_type), _usage(usage) {
+    size_t _size;
+    Buffer(GLenum target) : Target(target) {}
+    virtual GLuint declare() override {
+        if (!_id) {
             glGenBuffers(1, &_id);
         }
-    Buffer(
-        const RawVec& init_data,
-        GLenum buffer_type,
-        GLenum usage=GL_STATIC_DRAW
-    ) : _type{buffer_type}, _usage{usage} { data(init_data); }
-    Buffer(
-        unsigned int size,
-        GLenum buffer_type,
-        GLenum usage=GL_STATIC_DRAW
-    ) : Buffer(RawVec(size), buffer_type, usage) {}
-
-    Buffer(Buffer&& rhs) { *this = std::move(rhs); }
-    Buffer& operator=(Buffer&& rhs) {
-        remove();
-        _usage = rhs._usage;
-        _id = rhs._id;
-        rhs._id = 0;
-        return *this;
-    }
-
-    GLenum usage() const { return _usage; }
-    unsigned int id() const { return _id; }
-    GLuint size() const { return _size; }
-    bool isInitialized() const override { return _id && glIsBuffer(_id) && bool(_size); }
-    RawVec data() const {
-        RawVec ret(_size);
         bind();
-        glGetBufferSubData(_type, 0, _size, ret.data());
+        return _id;
-        return ret;
     } 
-    void bind() const override { glBindBuffer(_type, _id); }
+    virtual void remove() override {
-    void unbind() const override { glBindBuffer(_type, 0); }
+        if (_id) {
-
-    GLenum usage(GLenum usage) {
-        _usage=usage;
-        data(data());
-        return _usage;
-    }
-    void data(const RawVec& set_data) {
-        if (!glfwGetCurrentContext()) {
-            THROW_BUFFER_ERROR("No OpenGL context.");
-        }
-        bind();
-        glBufferData(_type, set_data.size(), set_data.data(), _usage);
-        _size = set_data.size();
-    }
-    void data(const RawVec& newData, unsigned int offset) {
-        if (newData.size()+offset > _size) {
-            THROW_BUFFER_ERROR("Attempting to overflow buffer of capacity " + std::to_string(_size) + ".");
-        }
-        bind();
-        glBufferSubData(_type, offset, newData.size(), newData.data());
-    }
-    void data(void* src, unsigned int offset, unsigned int size) {
-        if (size+offset > _size) {
-            THROW_BUFFER_ERROR("Attempting to overflow buffer of capacity " + std::to_string(_size) + ".");
-        }
-        bind();
-        glBufferSubData(_type, offset, size, src);
-    }
-
-protected:
-    virtual void remove() const override {
             unbind();
-        if (_id) { glDeleteBuffers(1, &_id); }
+            glDeleteBuffers(1, &_id);
+            _id = 0;
+        }
     }
 
-    using OpenGLObject::_id;
+    public:
-    GLenum _type;
+    const GLenum Target;
-    GLenum _usage;
+    using OpenGLObject::OpenGLObject;
-    unsigned int _size = 0;
+    Buffer(Buffer&& other);
+    Buffer& operator=(Buffer&& rhs);
+
+    virtual void bind() const override {
+        if (_id) {
+            glBindBuffer(Target, _id);
+        } else {
+            THROW(OGLError(
+                OGLError::Codes::INVALID_OBJECT,
+                "w/ BufferType " + BufferTypes.at(Target)
+            ));
+        }
+    }
+    virtual void unbind() const override { glBindBuffer(Target, 0); }
+    GLenum usage() const;
+    size_t size() const;
+    ByteVector data() const;
+
+    void data(const ByteVector& data, GLenum usage=GL_STATIC_DRAW);
+    void data(const void* data, size_t size, GLenum usage=GL_STATIC_DRAW);
+    void subdata(const void* data, size_t size, GLintptr offset=0);
+    void subdata(const ByteVector& data_, GLintptr offset=0);
+    // virtual void clear() const { glClearBufferData(Target, ) }
+
 };
 
-
+/* template <typename BufferType>
-class Texture : public OpenGLObject {
+class ImmutableBuffer : public virtual Buffer {
     public:
-    Texture(GLenum tar=GL_TEXTURE_2D) : _target(tar) { glGenTextures(1, &_id); }
+    ImmutableBuffer() = default;
-
+    ImmutableBuffer(
-    Texture(Texture&& rhs) { *this=std::move(rhs); }
+        size_t size_,
-    Texture& operator=(Texture&& rhs) {
+        GLenum usage_ = GL_STATIC_DRAW,
-        _target = rhs._target;
+        GLbitfield flags_=0x0
-        _id = rhs._id;
+    ) : size(size_), Base::usage(usage_) {
-        rhs._id = 0;
+        glBufferStorage(Target, size, nullptr, flags_);
-        return *this;
     }
 
-    void bind() const override { glBindTexture(_target, _id); }
+    std::weak_ptr<void> map(GLbitfield access_) {
-    void unbind() const override { glBindTexture(_target, 0); }
+        if (_map && _mapAccess != access_) { unmap(); }
-    bool isInitialized() const override { return _id && glIsTexture(_id); }
+        _mapAccess = access_;
-
+        if (!_map) {
-protected:
-    using OpenGLObject::_id;
-    GLenum _target;
-};
-
-class Framebuffer : public OpenGLObject {
-public:
-
-    Framebuffer(GLenum tar=GL_FRAMEBUFFER) : _target(tar) { glGenFramebuffers(1, &_id); }
-
-    Framebuffer(Framebuffer&& rhs) { *this=std::move(rhs); }
-    Framebuffer& operator=(Framebuffer&& rhs) {
-        remove();
-        _target = rhs._target;
-        _id = rhs._id;
-        rhs._id = 0;
-        return *this;
-    }
-
-    void bind() const override { glBindFramebuffer(_target, _id); }
-    void unbind() const override { glBindFramebuffer(_target, 0); }
-    bool isInitialized() const override { return _id && glIsFramebuffer(_id); }
-    GLenum status() const {
             bind();
-        return glCheckFramebufferStatus(_target);
+            glMapBuffer(Target, _mapAccess);
         }
-
+        return _map;
-
-protected:
-    virtual void remove() const override {
-        unbind();
-        if (_id) { glDeleteFramebuffers(1, &_id); }
     }
-    using OpenGLObject::_id;
+    void unmap() {
-    GLenum _target;
-};
-
-class Renderbuffer : public OpenGLObject {
-public:
-    Renderbuffer(unsigned int x, unsigned int y, GLenum format=GL_RGBA32F, unsigned int multi=0) : Renderbuffer() {
-        storage(x, y, format, multi);
-    }
-    Renderbuffer() { glGenRenderbuffers(1, &_id); }
-
-
-    Renderbuffer(Renderbuffer&& rhs) { *this = std::move(rhs); }
-    Renderbuffer& operator=(Renderbuffer&& rhs) {
-        _format = rhs._format;
-        _id = rhs._id;
-        rhs._id = 0;
-        return *this;
-    }
-
-    virtual void bind() const override { glBindRenderbuffer(GL_RENDERBUFFER, _id); }
-    virtual void unbind() const override { glBindRenderbuffer(GL_RENDERBUFFER, _id); }
-    virtual bool isInitialized() const override { return _id && glIsRenderbuffer(_id); }
-
-    void storage(unsigned int x, unsigned int y, GLenum format=GL_RGBA32F, unsigned int multi=0) {
-        _sizex = x;
-        _sizey = y;
-        _format = format;
-        _multisample = multi;
         bind();
-        glRenderbufferStorageMultisample(GL_RENDERBUFFER, _multisample, _format, _sizex, _sizey);
+        glUnmapBuffer(Target);
+        _map.reset();
     }
     
+    const size_t size;
 
 protected:
-    virtual void remove() const override {
+    std::shared_ptr<void> _map = nullptr;
-        unbind();
+    GLbitfield _mapAccess = 0;
-        if (_id) { glDeleteRenderbuffers(1, &_id); }
+
+}; */
+
+class ArrayBuffer : public Buffer {
+    public:
+    template<typename T>
+    ArrayBuffer(const std::vector<T>& data, GLenum usage=GL_STATIC_DRAW)
+    : Buffer(GL_ARRAY_BUFFER) {
+        Buffer::data(vectorToBytes(data), usage);
     }
-
-    using OpenGLObject::_id;
-    GLenum _format;
-    unsigned int _sizex{0};
-    unsigned int _sizey{0};
-    unsigned int _multisample{0};
-
 };
 
-*/
+class ElementBuffer : protected Buffer {
+    protected:
+    GLenum _glslType;
+    size_t _typeSize;
+
+    public:
+    using Buffer::Target;
+    using Buffer::bind;
+    using Buffer::usage;
+    using Buffer::unbind;
+    ElementBuffer();
+    template<typename T>
+    ElementBuffer(const T* const data_ptr, size_t size, GLenum usage=GL_STATIC_DRAW)
+    : Buffer(GL_ELEMENT_ARRAY_BUFFER) {
+        data(data_ptr, size, usage);
+    }
+    template<typename T>
+    ElementBuffer(const std::vector<T>& data_, GLenum usage_=GL_STATIC_DRAW)
+    : ElementBuffer(data_.data(), data_.size(), usage_) {}
+    
+    size_t size() const;
+    size_t typeSize() const;
+    ByteVector data() const;
+    GLenum glslType() const;
+    template<typename T>
+    void data(const T* data_, size_t size_, GLenum usage_=GL_STATIC_DRAW) {
+        declare();
+        using TypeInfo = GLSLType<T>;
+        _typeSize = TypeInfo::size;
+        Buffer::data(data_, size_*_typeSize, usage_);
+        _glslType = TypeInfo::value;
+    }
+    template<typename T>
+    void data(const std::vector<T>& data_, GLenum usage_=GL_STATIC_DRAW) {
+        data(data_.data(), data_.size(), usage_);
+    }
+    template<typename T>
+    void subdata(const T* data, size_t size, size_t offset) {
+        using TypeInfo = GLSLType<T>;
+        if ( _glslType != TypeInfo::value ) {
+            THROW( BufferError(
+                Codes::DATA_ERROR,
+                "Check element buffer data types"
+            ) );
+        }
+        Buffer::subdata(data, size*_typeSize, offset);
+    }
+    template<typename T>
+    void subdata(const std::vector<T>& data, size_t offset=0) {
+        subdata(data.data(), data.size(), offset);
+    }
+
+
+};
 
 } // namespace NB
 #endif // _NB_BUFFER

engine/NBGraphics/CMakeLists.txt

@@ -1,26 +1,38 @@
-include_directories(./.)
-
 find_package(OpenGL)
 add_subdirectory(${GLFW_PATH} ${GLFW_PATH}/build)
 
-include_directories(${GLFW_PATH}/include ${GLAD_PATH}/include)
+include_directories(
+    ${GLFW_PATH}/include
+    ${GLAD_PATH}/include
+    ${STBIMAGE_PATH}
+)
 
 set(GLFW_BUILD_DOCS OFF CACHE BOOL "" FORCE)
 set(GLFW_BUILD_TESTS OFF CACHE BOOL "" FORCE)
 set(GLFW_BUILD_EXAMPLES OFF CACHE BOOL "" FORCE)
 
 toAbsolutePath(NB_GRAPHICS_SOURCE
-    ./src/Window.cpp
     ./src/Buffers.cpp
+    ./src/FrameBuffers.cpp
+    ./src/Image.cpp
+    ./src/OGLObjects.cpp
+    ./src/ProgramPipeline.cpp
+    ./src/Textures.cpp
+    ./src/VertexArray.cpp
+    ./src/Window.cpp
 )
 
 toAbsolutePath(NB_GRAPHICS_INCLUDE
     ./Buffers.hpp
     ./Camera.hpp
     ./Draw.hpp
+    ./FrameBuffers.hpp
     ./GLLoad.hpp
-    ./shader.hpp
+    ./Image.hpp
-    ./VAOManager.hpp
+    ./OGLObjects.hpp
+    ./ProgramPipeline.hpp
+    ./Textures.hpp
+    ./VertexArray.hpp
     ./Window.hpp
 )
 
@@ -31,4 +43,11 @@ add_library(NBGraphics
     ${NB_GRAPHICS_SOURCE}
     ${GLAD_PATH}/src/glad.c
 )
-target_link_libraries(NBGraphics glfw3)
+target_link_libraries(NBGraphics glfw)
+
+target_include_directories(NBGraphics PUBLIC ./.)
+
+if (NB_BUILD_TESTS)
+    add_subdirectory(./tests)
+endif()
+

engine/NBGraphics/Camera.hpp

@@ -2,13 +2,14 @@
 #ifndef _NB_CAMERA
 #define _NB_CAMERA
 
-#include <GLLoad.h>
+#include "GLLoad.hpp"
+
 #include <glm/glm.hpp>
 #include <glm/gtc/matrix_inverse.hpp>
 #include <glm/gtc/matrix_transform.hpp>
 #include <glm/gtc/type_ptr.hpp>
 
-namespace NB {
+namespace nb {
 
 class Camera {
 public:

engine/NBGraphics/FrameBuffers.hpp

@@ -0,0 +1,236 @@
+#pragma once
+#ifndef _NB_FRAMEBUFFER
+#define _NB_FRAMEBUFFER
+
+#include "GLLoad.hpp"
+
+#include <NBCore/Errors.hpp>
+
+#include "Image.hpp"
+#include "OGLObjects.hpp"
+#include "Textures.hpp"
+
+namespace nb {
+
+class FrameBufferError : public Error<FrameBufferError> {
+    protected:
+    using Base = Error<FrameBufferError>;
+    
+    public:
+    using Base::Base;
+    enum Codes : unsigned int {
+        UNDEFINED, INVALID_VALUE
+    };
+    static const std::string type;
+    static const ErrorCodeMap ErrorMessages;
+};
+
+class RenderBuffer : public RenderTarget {
+    protected:
+    GLuint declare() override {
+        if (!_id) {
+            glRenderbufferStorage(
+                GL_RENDERBUFFER,
+                format,
+                width,
+                height
+            );
+        }
+        return _id;
+    }
+    void remove() override {
+        if (_id) {
+            unbind();
+            glDeleteRenderbuffers(1, &_id);
+            _id = 0;
+        }
+    }
+
+    public:
+    const unsigned int width;
+    const unsigned int height;
+    const GLenum format;
+    template<typename PixelType>
+    RenderBuffer(unsigned int width_, unsigned int height_) :
+        width(width_),
+        height(height_),
+        format(OGLPixelFormat<PixelType>::glFormat),
+        RenderTarget(GL_RENDERBUFFER) 
+    { declare(); }
+    RenderBuffer(RenderBuffer&& rhs) :
+        width(rhs.width),
+        height(rhs.height),
+        format(rhs.format),
+        RenderTarget(std::move(rhs))
+    {}
+    RenderBuffer& operator=(RenderBuffer&&) = delete;
+    void bind() const override {
+        if (_id) {
+            glBindRenderbuffer(GL_RENDERBUFFER, _id);
+        } else {
+            THROW(OGLError(
+                OGLError::Codes::INVALID_OBJECT,
+                "w/ RenderBuffer"
+            ));
+        }
+    }
+    void unbind() const override {
+        glBindRenderbuffer(GL_RENDERBUFFER, 0);
+    }
+
+};
+
+class FrameBufferBase : public OpenGLObject {
+    private:
+    static bool texTypeIs2D(GLenum texType) {
+        switch(texType) {
+            case GL_TEXTURE_2D:
+            default:
+                return true;
+                break;
+        }
+    }
+    
+    protected:
+    using AttachmentMap = std::unordered_map<GLenum, std::shared_ptr<RenderTarget>>;
+    AttachmentMap _attachments;
+    FrameBufferBase(GLenum target);
+    GLuint declare() override;
+    void remove() override;
+    std::shared_ptr<RenderTarget> detach(GLenum);
+    void attach(
+        GLenum attachment,
+        std::shared_ptr<Texture> texture,
+        unsigned int level=0
+    );
+    void attach(
+        GLenum attachment,
+        std::shared_ptr<Texture> texture,
+        unsigned int level,
+        unsigned int layer
+    );
+    void attach(
+        GLenum attachment,
+        std::shared_ptr<RenderBuffer> renderBuffer
+    ) {
+        declare();
+        if (attachment == GL_NONE) {
+            THROW(FrameBufferError(FrameBufferError::INVALID_VALUE,
+                "Cannot attach RenderBuffer to `GL_NONE`"
+            ));
+        }
+        glFramebufferRenderbuffer(
+            Target,
+            attachment,
+            GL_RENDERBUFFER,
+            renderBuffer->id()
+        );
+        _attachments[attachment] = renderBuffer;
+    }
+
+    public:
+    const GLenum Target;
+    void bind() const override;
+    void unbind() const override;
+    GLenum status() const;
+    AttachmentMap getAllBuffers() const;
+    std::shared_ptr<RenderTarget> getBuffer(GLenum) const;
+};
+
+class ReadFrameBuffer;
+class WriteFrameBuffer;
+
+class ReadFrameBuffer : public virtual FrameBufferBase {
+    friend WriteFrameBuffer;
+    protected:
+    using FrameBufferBase::_attachments;
+    GLenum _location;
+
+    public:
+    using FrameBufferBase::attach;
+    ReadFrameBuffer();
+    ReadFrameBuffer& operator=(WriteFrameBuffer&&);
+    ReadFrameBuffer& operator=(ReadFrameBuffer&&);
+    std::shared_ptr<RenderTarget> getReadBuffer() const;
+    GLenum getReadLocation() const;
+    std::shared_ptr<RenderTarget> setReadBuffer(GLenum attachment);
+    template<typename T, typename... Args>
+    std::shared_ptr<RenderTarget> setReadBuffer(
+        GLenum attachment,
+        std::shared_ptr<T> target,
+        Args... args
+    ) {
+        declare();
+        FrameBufferBase::attach(attachment, target, args...);
+        setReadBuffer(attachment);
+        return getReadBuffer();
+    }
+};
+
+class WriteFrameBuffer : public virtual FrameBufferBase {
+    friend ReadFrameBuffer;
+    protected:
+    using DrawTexVec = std::vector<std::shared_ptr<Texture>>;
+    using FrameBufferBase::_attachments;
+    std::vector<GLenum> _locations;
+
+    public:
+    WriteFrameBuffer();
+    WriteFrameBuffer& operator=(ReadFrameBuffer&&);
+    WriteFrameBuffer& operator=(WriteFrameBuffer&&);
+    template<typename... T>
+    void attach(
+        GLenum attachment,
+        std::shared_ptr<Texture> texture,
+        T... args
+    ) { FrameBufferBase::attach(attachment, texture, args...); }
+    DrawTexVec getWriteBuffers() const;
+    std::vector<GLenum> getWriteLocations() const;
+    DrawTexVec setWriteBuffers(const std::vector<GLenum>& attachments);
+    std::shared_ptr<Texture> setWriteBuffer(GLenum attachment);
+    template<typename... T>
+    std::shared_ptr<Texture> setWriteBuffer(
+        GLenum attachment,
+        std::shared_ptr<Texture> texture,
+        T... args
+    ) {
+        attach(attachment, texture, args...);
+        setWriteBuffer(attachment);
+        return std::static_pointer_cast<Texture>(_attachments.at(attachment));
+    }
+
+    RGBA<float> clearColorValue() const;
+    RGBA<float> clearColorValue(const RGBA<float>&);
+    RGBA<float> clearColorValue(float r, float g, float b, float a);
+    double clearDepthValue() const;
+    double clearDepthValue(double);
+    GLint clearStencilValue() const;
+    GLint clearStencilValue(GLint);
+    void clear(GLbitfield mask=(
+        GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT
+    )) const;
+    void clearColor() const;
+    void clearDepth() const;
+    void clearDepth(float) const;
+    void clearStencil() const;
+    void clearStencil(GLint) const;
+    void clearDepthStencil() const;
+    void clearDepthStencil(float, GLint) const;
+};
+
+class FrameBuffer : public ReadFrameBuffer, public WriteFrameBuffer {
+    protected:
+    using FrameBufferBase::_attachments;
+    using ReadFrameBuffer::_location;
+    using WriteFrameBuffer::_locations;
+
+    public:
+    FrameBuffer();
+    FrameBuffer& operator=(FrameBuffer&&);
+    FrameBuffer& operator=(ReadFrameBuffer&&);
+    FrameBuffer& operator=(WriteFrameBuffer&&);
+};
+
+} // namespace nb
+
+#endif // _NB_FRAMEBUFFER

engine/NBGraphics/GLLoad.hpp

@@ -5,31 +5,4 @@
 #include <glad/glad.h>
 #include <GLFW/glfw3.h>
 
-#include <iostream>
-#include <string>
-
-namespace NB {
-
-static unsigned int __NB_GL_DEBUG_ERROR_CODE__;
-
-static std::string formatDebugString(const std::string& msg, const std::string& file="", int line=-1) {
-    std::string ret = "";
-    if (file != "") {
-        ret += "In file " + file;
-        if (line >= 0) {
-            ret += " at line " + std::to_string(line);
-        }
-        ret += ":\n\t";
-    }
-    return ret + msg;
-}
-
-}
-
-#define NB_GL_DEBUG_THROW(cmd, when) while(NB::__NB_GL_DEBUG_ERROR_CODE__=glGetError()){\
-    std::cout << "[GL ERROR]: " << NB::__NB_GL_DEBUG_ERROR_CODE__;\
-    std::cout << " " << when << " " << cmd << "\n";\
-} 
-#define NB_GL_DEBUG(cmd) NB_GL_DEBUG_THROW(#cmd, "before"); cmd; NB_GL_DEBUG_THROW(#cmd, "after");
-
 #endif

engine/NBGraphics/Image.hpp

@@ -0,0 +1,216 @@
+#pragma once
+#ifndef _NB_IMAGE
+#define _NB_IMAGE
+
+#include <cstring>
+
+#include <NBCore/Errors.hpp>
+
+namespace nb {
+
+template<typename T>
+struct Color {};
+
+struct Red : Color<Red> {};
+struct Green : Color<Green> {};
+struct Blue : Color<Blue> {};
+struct Alpha : Color<Alpha> {};
+
+struct Depth;
+struct Stencil;
+
+template<typename... T>
+struct PixelChannel;
+
+template<typename T>
+struct PixelChannel<T, Red> {
+    using type=T;
+    T value;
+    T& r=value;
+};
+template<typename T>
+struct PixelChannel<T, Green> { 
+    using type=T;
+    T value;
+    T& g=value;
+};
+template<typename T>
+struct PixelChannel<T, Blue> { 
+    using type=T;
+    T value;
+    T& b=value;
+};
+template<typename T>
+struct PixelChannel<T, Alpha> { 
+    using type=T;
+    T value;
+    T& a=value;
+};
+
+template<typename T>
+struct PixelChannel<T, Depth> {
+    using type=T;
+    T value;
+    T& z=value;
+};
+
+template<>
+struct PixelChannel<uint8_t, Stencil> {
+    using type=uint8_t;
+    uint8_t value;
+    uint8_t& u=value;
+};
+
+template<typename T, typename... Channels>
+struct Pixel : public PixelChannel<T, Channels>... {
+    Pixel() = default;
+    Pixel& operator=(const Pixel& rhs) {
+        ((
+            [&](const typename PixelChannel<T, Channels>::type& val){
+                this->PixelChannel<T, Channels>::value = val;
+            }(rhs.PixelChannel<T, Channels>::value)
+        ), ...);
+        return *this;
+    }
+
+
+    Pixel(const Pixel& cpy)
+    : Pixel(cpy.PixelChannel<T, Channels>::value...) {}
+
+    Pixel(typename PixelChannel<T, Channels>::type... vals)
+    : PixelChannel<T, Channels>{vals}... {}
+};
+
+template<typename Ref>
+struct PixelReference;
+
+template<typename T, typename... Channels>
+struct PixelReference<Pixel<T, Channels...>> 
+: public Pixel<T&, Channels...> {
+    using PixelType = Pixel<T, Channels...>;
+    using Base = Pixel<T&, Channels...>;
+    using Base::Base;
+
+    PixelReference(PixelType& pixel)
+    : Base(pixel.PixelChannel<T, Channels>::value...) {}
+
+    operator PixelType() {
+        return PixelType(this->PixelChannel<T&, Channels>::value...);
+    }
+
+    PixelReference& operator=(const PixelType& pixel) {
+        ((
+            [&](const typename PixelChannel<T, Channels>::type& val){
+                this->PixelChannel<T&, Channels>::value = val;
+            }(pixel.PixelChannel<T, Channels>::value)
+        ), ...);
+        return *this;
+    }
+
+};
+
+template <typename T>
+using RGBA = Pixel<T, Red, Green, Blue, Alpha>;
+
+template <typename T>
+using RGB = Pixel<T, Red, Green, Blue>;
+
+class ImageError : public Error<ImageError> {
+    protected:
+    using Base = Error<ImageError>;
+    using Base::Base;
+
+    public:
+    enum Codes : unsigned int {
+        UNDEFINED, OUT_OF_BOUNDS
+    };
+    static const std::string type;
+    static const ErrorCodeMap ErrorMessages;
+
+};
+
+template<typename T>
+class Image;
+
+template<typename T, typename... Channels>
+class Image<Pixel<T, Channels...>> {
+    protected:
+    using Codes = ImageError::Codes;
+    T* _data;
+    Image(unsigned int x, unsigned int y)
+    : width(x), height(y), _data(nullptr) {}
+
+    public:
+    using PixelType = Pixel<T, Channels...>;
+    static constexpr size_t NumberChannels = sizeof...(Channels);
+    const unsigned int width;
+    const unsigned int height;
+    Image(unsigned int x, unsigned int y, const T* data) 
+    : Image(x, y) {
+        size_t data_size = width*height*NumberChannels;
+        _data = new T[data_size];
+        std::memcpy(_data, data, data_size*sizeof(T));
+    }
+    Image(const Image&) = delete;
+    Image& operator=(const Image&) = delete;
+    Image& operator=(Image&&) = delete;
+    Image(Image&& mv) 
+    : width(mv.width), height(mv.height), _data(mv._data) {
+        mv._data = nullptr;
+    }
+
+    ~Image() {
+        if (_data) {
+            delete[] _data;
+        }
+    }
+
+    const T* data() const { return _data; }
+    Image&& copy() const {
+        return Image(width, height, _data);
+    }
+    PixelReference<PixelType> at(unsigned int x, unsigned int y) {
+        if (!(x<width) || !(y<height)) {
+            std::string note = "w/ ("+std::to_string(x);
+            note += ", "+std::to_string(y) + ") >= (";
+            note += std::to_string(width)+", "+std::to_string(height);
+            note += ")";
+            THROW(ImageError(
+                Codes::OUT_OF_BOUNDS,
+                note
+            ));
+        }
+        auto coord = y*height+x;
+        return PixelReference<PixelType>(
+           _data[coord*NumberChannels+Find<Channels, Channels...>::value-1]...
+        );
+    }
+
+};
+
+template<typename... T>
+class ImageReference;
+
+template<typename T, typename... Channels>
+class ImageReference<Pixel<T, Channels...>> : public Image<Pixel<T, Channels...>> {
+    protected:
+    using Base = Image<Pixel<T, Channels...>>;
+    using Base::_data;
+
+    public:
+    using Base::width;
+    using Base::height;
+    using Base::copy;
+    ImageReference(unsigned int x, unsigned int y, T* data)
+    : Base(x, y) {
+        _data = data;
+    }
+    ~ImageReference() noexcept {
+        Base::_data = nullptr;
+    }
+
+};
+
+} // namespace nb
+
+#endif // _NB_IMAGE

engine/NBGraphics/OGLObjects.hpp

@@ -0,0 +1,48 @@
+#pragma once
+#ifndef _NB_OGL_OBJECTS
+#define _NB_OGL_OBJECTS
+
+#include "GLLoad.hpp"
+
+#include <NBCore/Errors.hpp>
+
+namespace nb {
+
+class OGLError : public Error<OGLError> {
+    using Base = Error<OGLError>;
+    
+    public:
+    using Base::Base;
+
+    enum Codes : unsigned int {
+        UNDEFINED, HANGING_OBJECT, INVALID_OBJECT
+    };
+
+    static const std::string type;
+    static const ErrorCodeMap ErrorMessages;
+};
+
+class OpenGLObject {
+    public:
+    OpenGLObject(const OpenGLObject&) = delete;
+    OpenGLObject& operator=(const OpenGLObject&) = delete;
+    OpenGLObject(OpenGLObject&&);
+    OpenGLObject& operator=(OpenGLObject&&);
+    virtual ~OpenGLObject() {};
+    
+    virtual void bind() const = 0;
+    virtual void unbind() const = 0;
+    GLuint id() const { return _id; }
+    
+    protected:
+    using Codes = OGLError::Codes;
+    OpenGLObject() = default;
+    
+    virtual GLuint declare() = 0;
+    virtual void remove() = 0;
+
+    GLuint _id = 0;
+};
+
+} // namespace nb
+#endif // _NB_OGL_OBJECTS

engine/NBGraphics/ProgramPipeline.hpp

@@ -0,0 +1,141 @@
+#pragma once
+#ifndef _NB_SHADER
+#define _NB_SHADER
+
+#include "GLLoad.hpp"
+
+#include <string>
+
+#include <NBCore/Errors.hpp>
+#include <NBCore/Utils.hpp>
+
+#include "OGLObjects.hpp"
+
+namespace nb {
+
+class ShaderError : public Error<ShaderError> {
+    using Base = Error<ShaderError>;
+
+    public:
+    using Base::Base;
+
+    enum Codes : unsigned int {
+        UNDEFINED
+    };
+
+    static const std::string type;
+    static const ErrorCodeMap ErrorMessages;
+};
+
+class ProgramError : public Error<ProgramError> {
+    using Base = Error<ProgramError>;
+
+    public:
+    using Base::Base;
+
+    enum Codes : unsigned int {
+        UNDEFINED, LINKING_ERROR
+    };
+
+    static const std::string type;
+    static const ErrorCodeMap ErrorMessages;
+};
+
+enum OpenGLProfiles {
+    Core,
+    Compatibility,
+    ES
+};
+
+class Shader : public OpenGLObject {
+    using Base = OpenGLObject;
+    
+    public:
+    using Base::Base;
+    using Base::id;
+    Shader(GLenum, const std::string&);
+    Shader(GLenum, const std::vector<std::string>&);
+    Shader(Shader&&);
+    Shader& operator=(Shader&&) = delete;
+    ~Shader() { remove(); }
+    operator bool();
+    virtual void bind() const override { /* TODO: Some warning of some kind perhaps*/ }
+    virtual void unbind() const override { /* TODO: Some warning of some kind perhaps*/ }
+    bool success() const;
+    GLint status(GLenum) const;
+    std::string log() const;
+    const GLenum target;
+    friend Base;
+
+    protected:
+    using Base::_id;
+    GLint _success;
+    std::vector<std::string> _sources;
+
+    virtual void compile() {
+        int num_srcs = _sources.size();
+        std::vector<char*> src_ptrs(num_srcs);
+        for (int i=0; i < num_srcs; ++i) {
+            src_ptrs[i] = _sources[i].data();
+        }
+        glShaderSource(_id, num_srcs, src_ptrs.data(), NULL);
+        glCompileShader(_id);
+        _success = status(GL_COMPILE_STATUS);
+        if (!_success) {
+            WARN(log(), 0x0FE);
+        }
+    }
+
+    virtual GLuint declare() override {
+        if (!_id) {
+            _id = _id = glCreateShader(target);
+        }
+        return _id;
+    }
+
+    virtual void remove() override {
+        if (_id) {
+            glDeleteShader(_id);
+        }
+    }
+
+};
+
+class Program : public OpenGLObject {
+    using Base = OpenGLObject;
+    
+    public:
+    using Base::Base;
+    using Base::id;
+    Program(SharedVector<Shader>);
+    Program(Program&&);
+    Program& operator=(Program&&) = delete;
+    operator bool();
+    ~Program() { remove(); }
+    virtual void bind() const override {
+        glUseProgram(_id);
+    }
+    virtual void unbind() const override { /* TODO: Some warning of some kind perhaps*/ }
+    GLint status(GLenum) const;
+    std::string log() const;
+    friend Base;
+
+    protected:
+    using Base::_id;
+    GLint _success;
+    virtual GLuint declare() override {
+        if (!_id) {
+            _id = glCreateProgram();
+        }
+        return _id;
+    } 
+    virtual void remove() override {
+        if (_id) {
+            glDeleteProgram(_id);
+        }
+    }
+
+};
+
+}
+#endif

engine/NBGraphics/Textures.hpp

@@ -0,0 +1,153 @@
+#pragma once
+#ifndef _NB_TEXTURES
+#define _NB_TEXTURES
+
+#include "Buffers.hpp"
+#include "Image.hpp"
+#include "OGLObjects.hpp"
+
+namespace nb {
+
+class TextureBuffer : public virtual Buffer {
+    public:
+    TextureBuffer() : Buffer(GL_TEXTURE_BUFFER) {}
+
+};
+
+class RenderTarget : public OpenGLObject {
+    protected:
+    using Base = OpenGLObject;
+    using Base::_id;
+    RenderTarget(GLenum target) : Target(target) {}
+    RenderTarget(RenderTarget&& rhs) 
+    : Target(rhs.Target), Base(std::move(rhs)) {}
+
+    public:
+    using Base::Base;
+    using Base::id;
+    const GLenum Target;
+};
+
+class Texture : public RenderTarget {
+    protected:
+    using Base = RenderTarget;
+    using Base::_id;
+    Texture(GLenum);
+    virtual GLuint  declare() override {
+        if (!_id) {
+            glGenTextures(1, &_id);
+        }
+        bind();
+        return _id;
+    }
+    virtual void remove() override {
+        if (_id) {
+            bind();
+            glDeleteTextures(0, &_id);
+        }
+    }
+
+    public:
+    using Base::Base;
+    using Base::id;
+    using Base::Target;
+
+    virtual void bind() const override {
+        if (_id) {
+            glBindTexture(Target, _id);
+        } else {
+            THROW(OGLError(
+                OGLError::Codes::INVALID_OBJECT,
+                "w/ Texture"
+            ));
+        }
+    }
+    virtual void unbind() const override {
+        glBindTexture(Target, 0);
+    }
+
+    template <typename T>
+    void parameter(GLenum param_, const T& val_);
+    void parameter(GLenum param_, const int& val_) {
+        declare();
+        glTexParameteri(_id, param_, val_);
+    }
+    void parameter(GLenum param_, const std::vector<int>& val_) {
+        declare();
+        glTexParameteriv(_id, param_, val_.data());
+    }
+    void parameter(GLenum param_, const std::vector<float>& val_) {
+        declare();
+        glTexParameterfv(_id, param_, val_.data());
+    }
+    void parameter(GLenum param_, const std::vector<unsigned int>& val_) {
+        declare();
+        glTexParameterIuiv(_id, param_, val_.data());
+    }
+    void generateMipmaps() const {
+        bind();
+        glGenerateMipmap(Target);
+    }
+
+};
+
+template<typename T>
+class ImageTexture;
+
+template<typename T>
+struct OGLPixelFormat;
+
+template<typename T, typename... Channels>
+struct OGLPixelFormat<Pixel<T, Channels...>>;
+
+template<>
+struct OGLPixelFormat<Pixel<uint8_t, Red, Green, Blue>> {
+    static constexpr GLenum glFormat = GL_RGB;
+    static constexpr GLenum glData = GL_UNSIGNED_BYTE;
+};
+
+template<>
+struct OGLPixelFormat<Pixel<uint8_t, Red, Green, Blue, Alpha>> {
+    static constexpr GLenum glFormat = GL_RGBA;
+    static constexpr GLenum glData = GL_UNSIGNED_BYTE;
+};
+
+template<typename T, typename... Channels>
+class ImageTexture<Pixel<T, Channels...>> : public Texture {
+    protected:
+    using Texture::Texture;
+    using PixelType = Pixel<T, Channels...>;
+
+    public:
+    using Texture::generateMipmaps;
+    ImageTexture() : Texture(GL_TEXTURE_2D) {}
+    ImageTexture(ImageTexture&& cpy) {
+        *this = std::move(cpy);
+    }
+    ImageTexture& operator=(ImageTexture&& rhs) {
+        return Texture::operator=(std::move(rhs));
+    }
+    void setImage(const Image<PixelType>& img, unsigned int layer) {
+        using Format = OGLPixelFormat<PixelType>;
+        declare();
+        glTexImage2D(
+            Target,
+            layer,
+            Format::glFormat,
+            img.width,
+            img.height,
+            0,
+            Format::glFormat,
+            Format::glData,
+            img.data()
+        );
+    }
+    void setImage(const Image<PixelType>& img, bool generateMipmap=true) {
+        setImage(img, (unsigned int)0);
+        if (generateMipmap) { generateMipmaps(); }
+    }
+
+};
+
+} // namespace nb
+#endif // _NB_TEXTURES

engine/NBGraphics/VAOManager.hpp

@@ -1,75 +0,0 @@
-#pragma once
-#ifndef _NB_VAO_MANAGER
-#define _NB_VAO_MANAGER
-
-#include <GLLoad.h>
-
-#include <exception>
-#include <memory>
-#include <vector>
-
-#include "Buffers.h"
-
-#define THROW_VAO_ERROR(msg) throw VAOError(msg, __FILE__, __LINE__);
-
-namespace NB {
-
-class VAOError : public std::runtime_error {
-public:
-    const bool error;
-    VAOError(const std::string& msg, const std::string& file="", int line=-1) 
-        : std::runtime_error(NB::formatDebugString(msg, file, line)), error(true) {}
-    VAOError(bool isError=true) : std::runtime_error(""), error(isError) {}
-};
-
-class VAOManager : public OpenGLObject {
-public:
-    typedef std::shared_ptr<Buffer> BufferManagerPointer;
-    //typedef BufferManager BufferManagerPointer;
-
-    VAOManager();
-    VAOManager(
-        std::vector<BufferManagerPointer>,
-        BufferManagerPointer elmt_buf = nullptr,
-        const VertexAttributeList& vert_attrs = {}
-    );
-    VAOManager(
-        BufferManagerPointer vert_bufs,
-        BufferManagerPointer elmt_buf = nullptr,
-        const VertexAttributeList& vert_attrs = {}
-    ) : VAOManager(std::vector<BufferManagerPointer>(1, vert_bufs), elmt_buf, vert_attrs) {}
-
-    VAOManager(VAOManager&& rhs);
-    VAOManager& operator=(VAOManager&& rhs);
-
-    VertexAttributeList getLayout() const;
-    GLuint id() const;
-    unsigned int vertSize(GLuint) const;
-    std::vector<BufferManagerPointer> getVertexBuffers() const;
-    bool isInitialized() const override;
-    RawVec attributeData(unsigned int);
-
-    RawVec attributeData(unsigned int, const RawVec&);
-    void bind() const;
-    void unbind() const;
-    void addVBO(BufferManagerPointer);
-    void changeEBO(BufferManagerPointer);
-    VertexAttributeList addVertexAttributes(const VertexAttributeList&);
-    VertexAttributeList addVertexAttributes(VertexAttribute);
-    VertexAttributeList generate();
-    VertexAttributeList generate(VertexAttributeList);
-    VertexAttributeList changeLayout(unsigned int, VertexAttributePointer);
-
-    VAOError checkValid(const VertexAttributeList&);
-
-private:
-    void remove() const override;
-
-    using OpenGLObject::_id;
-    std::map<GLuint, BufferManagerPointer> _vert_buffers;
-    BufferManagerPointer _elmt_buffer = nullptr;
-    VertexAttributeList _vert_attrs;
-};
-
-} // namespace NB
-#endif // _NB_VAO_MANAGER

engine/NBGraphics/VertexArray.hpp

@@ -0,0 +1,238 @@
+#pragma once
+#ifndef _NB_VERTEX_ARRAY
+#define _NB_VERTEX_ARRAY
+
+#include "GLLoad.hpp"
+
+#include <NBCore/Errors.hpp>
+
+#include "Buffers.hpp"
+#include "OGLObjects.hpp"
+
+
+namespace nb {
+
+static uint8_t GLSLTypeSize(GLenum type) {
+    switch(type) {
+    case GL_SHORT:
+    case GL_UNSIGNED_SHORT:
+    case GL_HALF_FLOAT:
+        return 2;
+        break;
+    case GL_INT:
+    case GL_UNSIGNED_INT:
+    case GL_FLOAT:
+        return 4;
+        break;
+    case GL_DOUBLE:
+        return 8;
+        break;
+    default:
+        return 1;
+        break;
+    }
+}
+
+struct VertexAttributeLayout {
+    int32_t offset = 0;
+    GLsizei stride = 0;
+    GLuint divisor = 0;
+};
+
+struct VertexAttribute {
+    GLint GLSLSize;
+    GLenum GLSLType;
+    GLboolean GLSLNormalization;
+    VertexAttributeLayout layout;
+};
+
+struct VertexAttributePointer {
+    VertexAttribute attribute;
+    GLuint buffer;
+    GLuint index;
+};
+
+static bool isIndexInVertexAttribute(int i, const VertexAttribute& va) {
+    if ((i -= va.layout.offset) < 0) { return false; }
+    return (i%va.layout.stride) < GLSLTypeSize(va.GLSLType) * va.GLSLSize;
+}
+
+typedef std::vector<VertexAttribute> VertexAttributeList;
+typedef std::vector<VertexAttributePointer> VertexAttributePointerList;
+
+class VAOError : public Error<VAOError> {
+    using Base = Error<VAOError>;
+    
+    public:
+    using Base::Base;
+    
+    enum Codes : unsigned int {
+        UNDEFINED, INVALID_ATTRIBUTE
+    };
+
+    static const std::string type;
+    static const ErrorCodeMap ErrorMessages;
+};
+
+class VAO : public OpenGLObject {
+    using Base = OpenGLObject;
+    using Codes = VAOError::Codes;
+
+    public:
+    using Base::Base;
+    VAO() = default;
+    VAO(const VertexAttributePointerList&);
+    VAO(VAO&&);
+
+    VAO& operator=(VAO&&);
+
+    virtual void bind() const override {
+        if(_id) {
+            glBindVertexArray(_id);
+        } else {
+            THROW(OGLError(
+                OGLError::Codes::INVALID_OBJECT,
+                "w/ VertexArrayObject"
+            ));
+        }
+    }
+    virtual void unbind() const override { glBindVertexArray(0); }
+
+    VertexAttributePointerList attributes() const;
+    VertexAttributePointerList attributes(const VertexAttributePointerList&);
+    VertexAttributePointer attr(GLuint) const;
+    void enable() const;
+    void enable(GLuint) const;
+    void disable() const;
+    void disable(GLuint) const;
+
+    protected:
+    using Base::_id;
+    VertexAttributePointerList _attrs;
+
+    virtual void remove() override {
+        if(_id) {
+            disable();
+            bind();
+            glDeleteVertexArrays(1, &_id);
+            _id = 0;
+        }
+    }
+    virtual GLuint declare() override {
+        if (!_id) {
+            glGenVertexArrays(1, &_id);
+        }
+        bind();
+        return _id;
+    }
+
+};
+
+class VertexError : public Error<VertexError> {
+    protected:
+    using Base = Error<VertexError>;
+    
+    public:
+    using Base::Base;
+    enum Codes : unsigned int {
+        UNDEFINED, MISALIGNED_DATA
+    };
+    static const std::string type;
+    static const ErrorCodeMap ErrorMessages;
+
+};
+
+using VBO = ArrayBuffer;
+using VertBufVec = SharedVector<VBO>;
+using EBO = ElementBuffer;
+
+struct VertexData {
+    std::shared_ptr<VBO> vbo;
+    VertexAttributeList attrs;
+};
+
+using VertexDataVec = std::vector<VertexData>;
+
+class VertexGroup {
+    protected:
+    using Codes = VertexError::Codes;
+    VertexDataVec _vertex_data;
+    std::shared_ptr<EBO> _ebo;
+    std::shared_ptr<VAO> _vao;
+    GLenum _primitive;
+
+    public:
+    GLenum primitive=GL_TRIANGLES;
+    VertexGroup(VertexGroup&&);
+    VertexGroup& operator=(VertexGroup&&);
+    
+    VertexGroup(
+        const VertexDataVec& vertex_data,
+        const std::shared_ptr<EBO>& ebo
+    )
+    : _vao(std::make_shared<VAO>()), _ebo(ebo) {
+        setBuffers(vertex_data);
+    }
+
+    template<typename... T>
+    VertexGroup(
+        const VertexDataVec& vertex_data,
+        T... args
+    )
+    : VertexGroup(vertex_data, std::make_shared<EBO>(args...)) {
+        setBuffers(vertex_data);
+    }
+    
+    template<typename... T>
+    VertexGroup(
+        const VertexData& vertex_data,
+        T... args
+    )
+    : VertexGroup(VertexDataVec{vertex_data}, args...) {}
+    
+    template<typename... T>
+    VertexGroup(
+        const ByteVector& vertex_data,
+        const VertexAttributeList& vertex_specification,
+        T... args
+    ) : VertexGroup({
+        std::make_shared<VBO>(vertex_data),
+        vertex_specification},
+        args...
+    ) {}
+
+    void bind() const {
+        _vao->bind();
+        _ebo->bind();
+    }
+    void unbind() const {
+        _vao->unbind();
+        _ebo->unbind();
+    }
+
+    void draw() const;
+
+    VertexDataVec getBuffers();
+    VertexData getBuffers(size_t);
+    size_t setBuffers(const VertexDataVec&);
+    size_t addBuffer(const VertexData&);
+    size_t addBuffer(const ByteVector& data, const VertexAttributeList& attrs);
+    VertexDataVec dropBuffers();
+    VertexData dropBuffer(size_t);
+
+    VertexAttributePointer attribute(size_t) const;
+    void enableAttr(GLuint);
+    void disableAttr(GLuint);
+    void enableBuffer(size_t);
+    void disableBuffer(size_t);
+    void enable();
+    void disable();
+
+    std::shared_ptr<EBO> indices() const;
+    std::shared_ptr<EBO> indices(const std::vector<unsigned int>& data);
+    std::shared_ptr<EBO> indices(std::shared_ptr<EBO> buffer);
+
+};
+
+} // namespace nb
+#endif // _NB_VERTEX_ARRAY

engine/NBGraphics/Window.hpp

@@ -4,22 +4,42 @@
 
 #include "GLLoad.hpp"
 
-#include <atomic>
 #include <array>
 #include <map>
 #include <stdexcept>
 #include <string>
 
+#include <NBCore/Errors.hpp>
+#include <NBCore/Utils.hpp>
+
 namespace nb {
 
-class GLError : public std::runtime_error {
+class OpenGLError : public Error<OpenGLError> {
+    using Base = Error<OpenGLError>;
+
     public:
-    GLError(const std::string&);
+    using Base::Base;
+
+    enum Codes : unsigned int {
+        UNDEFINED, INIT_FAILED, GLFW_INTIALIZED, GLAD_FAILED
     };
 
-class WindowError : public std::runtime_error {
+    static const std::string type;
+    static const ErrorCodeMap ErrorMessages;
+};
+
+class WindowError : public Error<WindowError> {
+    using Base = Error<WindowError>;
+
     public:
-    WindowError(const std::string&);
+    using Base::Base;
+
+    enum Codes : unsigned int {
+        UNDEFINED, INITIALIZED_WINDOW, NO_GLFW, INIT_FAILED
+    };
+
+    static const std::string type;
+    static const ErrorCodeMap ErrorMessages;
 };
 
 class Window {

engine/NBGraphics/shader.hpp

@@ -1,193 +0,0 @@
-#pragma once
-#ifndef _NB_SHADER
-#define _NB_SHADER
-
-#include <GLLoad.h>
-
-#include <cctype>
-#include <cstring>
-#include <exception>
-#include <fstream>
-#include <iostream>
-#include <map>
-#include <regex>
-#include <sstream>
-#include <string>
-#include <utility>
-#include <vector>
-
-#include <glm/glm.hpp>
-#include <glm/gtc/matrix_transform.hpp>
-#include <glm/gtc/type_ptr.hpp>
-
-// #define _PREPROC_FUNC_PARAMS_ (const ShaderPreprocessor&, ShaderUnit&, unsigned int, const std::string&, std::vector<uint8_t>&)
-
-namespace NB {
-
-class ShaderPreprocessorError : public std::runtime_error {
-public:
-    enum Codes : unsigned char {
-        NONE,
-        FILE_NOT_FOUND,
-        BUILTIN_NOT_FOUND,
-        CUSTOM,
-        UNDEFINED
-    };
-
-    const Codes code;
-
-    ShaderPreprocessorError(const std::string&, const std::string& file="", int line=-1);
-    ShaderPreprocessorError(Codes, const std::string& arg="", const std::string& file="", int line=-1);
-
-protected:
-    static std::string errorCodeParser(Codes, const std::string& arg="");
-};
-
-class ShaderError : public std::runtime_error {
-public:
-    ShaderError(const std::string&, const char* shad=nullptr, const std::string& file="", int line=-1);
-
-protected:
-    std::string formatString(const std::string&, const char* shad=nullptr, const std::string& file="", int line=-1);
-};
-
-struct File {
-    // typedef std::tuple<std::string, std::string, std::string> FilePath;
-    struct FilePath {
-        std::string dir;
-        std::string basename;
-        std::string ext;
-    };
-    FilePath path;
-    std::stringstream src;
-    std::map<unsigned int, std::shared_ptr<File>> include_map;
-
-    File() {}
-    File(const File& rhs) { *this = rhs; }
-
-    File& operator=(const File& rhs) {
-        path = rhs.path;
-        src.str("");
-        src << rhs.src.rdbuf();
-        include_map = rhs.include_map;
-        return *this;
-    }
-};
-
-// File::FilePath get_file_path(std::string);
-
-class ShaderPreprocessor;
-
-enum OpenGLProfiles {
-    Core,
-    Compatibility,
-    ES
-};
-
-struct ShaderUnit {
-    GLenum type = 0x0;
-    File file;
-    std::string preprocSource;
-    std::map<std::string, std::string> defines;
-    short vMajor=0, vMinor=0;
-    OpenGLProfiles profile = Core;
-};
-
-class ShaderPreprocessor;
-
-class ShaderProgram {
-    friend ShaderPreprocessor;
-public:
-    ShaderProgram() {}
-    ShaderProgram(const ShaderProgram& rhs) = delete;
-    ShaderProgram(ShaderProgram&& rhs);
-
-    ~ShaderProgram();
-
-    ShaderProgram& operator=(const ShaderProgram& rhs) = delete;
-    ShaderProgram& operator=(ShaderProgram&& rhs);
-
-    std::vector<ShaderUnit> getShaders() const;
-    ShaderUnit getShaders(unsigned int) const;
-    void use() const;
-    unsigned int id() const;
-
-    void setBool(const std::string& name, bool value) const;
-    void setInt(const std::string& name, int value) const;
-    void setUnsigned(const std::string& name, int value) const;
-    void setFloat(const std::string& name, float value) const;
-    void setMat4(const std::string& name, glm::mat4& value) const;
-
-    static ShaderProgram CreateShaderProgram(std::vector<ShaderUnit>&);
-
-private:
-    ShaderProgram(std::vector<ShaderUnit>& shaders) : _shader_units(shaders){}
-    
-    std::vector<ShaderUnit> _shader_units;
-    unsigned int _id;
-};
-
-class ShaderPreprocessor {
-public:
-    typedef ShaderPreprocessorError::Codes Codes;
-
-    enum TokenType {
-        TK,
-        DR,
-        WS,
-        NL,
-        LC,
-        BC
-    };
-    static std::string TokenName(const TokenType&);
-
-    std::map<std::string, GLenum> AcceptedExtensions = {
-        {".frag", GL_FRAGMENT_SHADER},
-        {".fs", GL_FRAGMENT_SHADER},
-        {".vert", GL_VERTEX_SHADER},
-        {".vs", GL_VERTEX_SHADER},
-        {".tess", 0x0},
-        {".geom", GL_GEOMETRY_SHADER},
-        {".comp", 0x0},
-        {".shad", 0x0},
-        {".glsl", 0x0}
-    };
-    std::map<std::string, OpenGLProfiles> AcceptedProfiles {
-        {"core", Core},
-        {"compatibility", Compatibility},
-        {"es", ES}
-    };
-    std::vector<std::string> Directories;
-    std::map<std::string, std::string> BuiltIns;
-
-    ShaderPreprocessor();
-    
-    
-    File load(const std::string, bool builtin_first=false) const;
-    ShaderUnit& preprocess(const std::string&, ShaderUnit&) const;
-    ShaderUnit preprocess(File, GLenum shader_type=0x0) const;
-    ShaderUnit preprocess(const std::string&, GLenum shader_type=0x0) const;
-    ShaderProgram ReloadFromFile(const ShaderProgram& rhs) const;
-    ShaderProgram CreateShaderProgram(std::vector<std::string>) const;
-
-private:
-    typedef std::pair<TokenType, std::string> Token;
-    typedef std::vector<std::string> StringVec; 
-
-    inline bool directive_dispatch(ShaderUnit&, const std::string&) const;
-    inline std::vector<Token> tokenize(const std::string&) const;
-
-    inline bool preprocessor_include(ShaderUnit&, const StringVec&, const std::string&) const;
-    inline bool preprocessor_version(ShaderUnit&, const StringVec&, const std::string&) const;
-    inline bool preprocessor_define(ShaderUnit&, const StringVec&, const std::string&) const;
-    // inline bool preprocessor_uniform(ShaderUnit&, const std::string&, const std::string&) const;
-
-    File loadFromBase(const std::string, const std::string base="") const;
-    File loadFromDirectories(const std::string) const;
-    File loadFromBuiltIn(const std::string) const;
-    File load_BuiltInFirst(const std::string) const;
-    File load_FilesFirst(const std::string) const;
-};
-
-}
-#endif

engine/NBGraphics/src/Buffers.cpp

@@ -2,4 +2,102 @@
 
 namespace nb {
 
+const std::unordered_map<GLenum, std::string> BufferTypes({
+    {GL_ARRAY_BUFFER, "GL_ARRAY_BUFFER"},
+    {GL_ELEMENT_ARRAY_BUFFER, "GL_ELEMENT_BUFFER"}
+});
+
+using BufferErrorCodes = BufferError::Codes;
+const std::string BufferError::type = "nb::BufferError";
+const ErrorCodeMap BufferError::ErrorMessages = {
+    { BufferErrorCodes::UNDEFINED, "Error" },
+    { BufferErrorCodes::DATA_OVERFLOW, "Attempting buffer overflow" },
+    {BufferErrorCodes::DATA_ERROR, "Invalid memory operation"}
+
+};
+
+Buffer::Buffer(Buffer&& rval) : Target(rval.Target) {
+    *this = std::move(rval);
+}
+
+Buffer& Buffer::operator=(Buffer&& rhs) {
+    if (Target != rhs.Target) {
+        auto targ_name = BufferTypes.at(Target);
+        THROW(OGLError(
+            OGLError::Codes::INVALID_OBJECT,
+            "w/ BufferType "+targ_name+" != BufferType "+BufferTypes.at(rhs.Target)
+        ));
+    }
+    OpenGLObject::operator=(std::move(rhs));
+    _usage = rhs._usage;
+    _size = rhs._size;
+
+    rhs._usage = GL_STATIC_DRAW;
+    rhs._size = 0;
+    return *this;
+}
+
+GLenum Buffer::usage() const { return _usage; }
+
+size_t Buffer::size() const { return _size; }
+
+ByteVector Buffer::data() const {
+    bind();
+    ByteVector ret(_size);
+    glGetBufferSubData(Target, 0, _size, ret.data());
+    return ret;
+}
+
+void Buffer::data(const void* data_, size_t size_, GLenum usage_) {
+    declare();
+    glBufferData(Target, size_, data_, usage_);
+    _size = size_;
+    _usage = usage_;
+}
+
+void Buffer::data(const ByteVector& data_, GLenum usage_) {
+    declare();
+    data(data_.data(), data_.size(), usage_);
+}
+
+void Buffer::subdata(const void* data_, size_t size_, GLintptr offset_) {
+    bind();
+    if (offset_+size_ <= _size) {
+        THROW(BufferError(BufferError::Codes::DATA_OVERFLOW));
+    }
+    glBufferSubData(Target, offset_, size_, data_);
+}
+
+void Buffer::subdata(const ByteVector& data_, GLintptr offset_) {
+    bind();
+    size_t size_ = data_.size();
+    subdata(data_.data(), size_);
+}
+
+ElementBuffer::ElementBuffer() : Buffer(GL_ELEMENT_ARRAY_BUFFER) {}
+
+ByteVector ElementBuffer::data() const {
+    return data();
+}
+
+size_t ElementBuffer::size() const { return _size / _typeSize; }
+
+size_t ElementBuffer::typeSize() const { return _typeSize; }
+
+GLenum ElementBuffer::glslType() const { return _glslType; }
+
+template void ElementBuffer::data<uint8_t>(const std::vector<uint8_t>& data, GLenum usage);
+template void ElementBuffer::data<uint16_t>(const std::vector<uint16_t>& data, GLenum usage);
+template void ElementBuffer::data<uint32_t>(const std::vector<uint32_t>& data, GLenum usage);
+template void ElementBuffer::data<uint8_t>(const uint8_t* const data, size_t size, GLenum usage);
+template void ElementBuffer::data<uint16_t>(const uint16_t* const data, size_t size, GLenum usage);
+template void ElementBuffer::data<uint32_t>(const uint32_t* const data, size_t size, GLenum usage);
+
+template void ElementBuffer::subdata<uint8_t>(const uint8_t* const data, size_t size, size_t offset=0);
+template void ElementBuffer::subdata<uint16_t>(const uint16_t* const data, size_t size, size_t offset=0);
+template void ElementBuffer::subdata<uint32_t>(const uint32_t* const data, size_t size, size_t offset=0);
+template void ElementBuffer::subdata<uint8_t>(const std::vector<uint8_t>& data, size_t offset=0);
+template void ElementBuffer::subdata<uint16_t>(const std::vector<uint16_t>& data, size_t offset=0);
+template void ElementBuffer::subdata<uint32_t>(const std::vector<uint32_t>& data, size_t offset=0);
+
 }

engine/NBGraphics/src/Camera.cpp

@@ -1,5 +1,6 @@
-#include "Camera.h"
+#include "Camera.hpp"
-namespace NB {
+
+namespace nb {
 
 // Camera class
 Camera::Camera(const Vec3& pos, const Vec3& tar, const Vec3& up) {

engine/NBGraphics/src/FrameBuffers.cpp

@@ -0,0 +1,342 @@
+#include "FrameBuffers.hpp"
+
+namespace nb {
+
+using FBOErrorCodes = FrameBufferError::Codes;
+const std::string FrameBufferError::type = "nb::FrameBufferError";
+const ErrorCodeMap FrameBufferError::ErrorMessages = {
+    {FBOErrorCodes::UNDEFINED, "Error"},
+    {FBOErrorCodes::INVALID_VALUE, "Invalid value"}
+};
+
+GLuint FrameBufferBase::declare() {
+    if (!_id) {
+        glGenFramebuffers(1, &_id);
+    }
+    bind();
+    return _id;
+}
+
+void FrameBufferBase::remove() {
+    if (_id) {
+        unbind();
+        glDeleteFramebuffers(1, &_id);
+        _id=0;
+    }
+}
+
+FrameBufferBase::FrameBufferBase(GLenum target) : Target(target) {}
+
+std::shared_ptr<RenderTarget> FrameBufferBase::detach(GLenum attch_) {
+    bind();
+    auto ret = _attachments.at(attch_);
+    _attachments.erase(attch_);
+    glFramebufferTexture(Target, attch_, 0, 0);
+    return ret;
+}
+
+void FrameBufferBase::attach(
+    GLenum attachment_,
+    std::shared_ptr<Texture> texture_,
+    unsigned int level_,
+    unsigned int layer_
+) {
+    declare();
+    if (attachment_ == GL_NONE) {
+        THROW(FrameBufferError(FrameBufferError::INVALID_VALUE,
+            "Cannot attach object to `GL_NONE`"
+        ));
+    }
+    glFramebufferTextureLayer(
+        Target,
+        attachment_,
+        texture_->id(),
+        level_,
+        layer_
+    );
+    _attachments[attachment_] = texture_;
+}
+
+void FrameBufferBase::attach(
+    GLenum attachment_,
+    std::shared_ptr<Texture> texture_,
+    unsigned int level_
+) {
+    declare();
+    if (attachment_ == GL_NONE) {
+            THROW(FrameBufferError(FrameBufferError::INVALID_VALUE,
+                "Cannot attach object to `GL_NONE`"
+            ));
+    }
+    if (texTypeIs2D(texture_->Target)) {
+        glFramebufferTexture2D(
+            Target,
+            attachment_,
+            texture_->Target,
+            texture_->id(),
+            level_
+        );
+    } else {
+        glFramebufferTexture1D(
+            Target,
+            attachment_,
+            texture_->Target,
+            texture_->id(),
+            level_
+        );
+    }
+    _attachments[attachment_] = texture_;
+}
+
+void FrameBufferBase::bind() const {
+    if (_id) {
+        glBindFramebuffer(Target, _id);
+    } else {
+        THROW(OGLError(
+            OGLError::Codes::INVALID_OBJECT,
+            "w/ FrameBuffer"
+        ));
+    }
+}
+
+void FrameBufferBase::unbind() const {
+    glBindFramebuffer(Target, 0);
+}
+
+GLenum FrameBufferBase::status() const {
+    bind();
+    return glCheckFramebufferStatus(Target);
+}
+
+FrameBufferBase::AttachmentMap FrameBufferBase::getAllBuffers() const {
+    return _attachments;
+}
+
+std::shared_ptr<RenderTarget> FrameBufferBase::getBuffer(GLenum attch_) const {
+    try {
+        return _attachments.at(attch_);
+    } catch (const std::out_of_range& e) {
+        THROW(e);
+    }
+}
+
+// class ReadFrameBuffer
+
+ReadFrameBuffer::ReadFrameBuffer()
+: _location(GL_NONE), FrameBufferBase(GL_READ_FRAMEBUFFER) {}
+
+ReadFrameBuffer& ReadFrameBuffer::operator=(WriteFrameBuffer&& mv) {
+    if (mv.id()) {
+        _attachments = mv.getAllBuffers();
+        mv.setWriteBuffer(GL_NONE);
+        mv._attachments = {};
+        mv._locations = {};
+        FrameBufferBase::OpenGLObject::operator=(std::move(mv));
+    }
+    return *this;
+}
+
+ReadFrameBuffer& ReadFrameBuffer::operator=(ReadFrameBuffer&& mv) {
+    if (mv.id()) {
+        _attachments = mv._attachments;
+        _location = mv._location;
+        mv._attachments = {};
+        mv._location = GL_NONE;
+        FrameBufferBase::OpenGLObject::operator=(std::move(mv));
+    }
+    return *this;
+}
+
+std::shared_ptr<RenderTarget> ReadFrameBuffer::getReadBuffer() const {
+    if (_location == GL_NONE) { return nullptr; }
+    return getBuffer(_location);
+}
+
+GLenum ReadFrameBuffer::getReadLocation() const { return _location; }
+
+std::shared_ptr<RenderTarget> ReadFrameBuffer::setReadBuffer(GLenum attch_) {
+    bind();
+    if (attch_!=GL_NONE) {
+        try {
+            const auto& x = _attachments.at(attch_);
+        } catch (const std::out_of_range& e) {
+            THROW(FrameBufferError(FrameBufferError::INVALID_VALUE,
+                "No buffer set at attachment"
+            ));
+        }
+    }
+    _location = attch_;
+    glReadBuffer(_location);
+    return getReadBuffer();
+}
+
+// class WriteFrameBuffer
+
+WriteFrameBuffer::WriteFrameBuffer()
+: FrameBufferBase(GL_DRAW_FRAMEBUFFER) {}
+
+WriteFrameBuffer& WriteFrameBuffer::operator=(ReadFrameBuffer&& rhs) {
+    if (rhs.id()) {
+        _attachments = rhs._attachments;
+        rhs.setReadBuffer(GL_NONE);
+        rhs._attachments = {};
+        rhs._location = GL_NONE;
+        FrameBufferBase::OpenGLObject::operator=(std::move(rhs));
+    }
+    return *this;
+}
+
+WriteFrameBuffer& WriteFrameBuffer::operator=(WriteFrameBuffer&& rhs) {
+    if (rhs.id()) {
+        _attachments = rhs._attachments;
+        _locations = rhs._locations;
+        rhs._attachments = {};
+        rhs._locations = {};
+        FrameBufferBase::OpenGLObject::operator=(std::move(rhs));
+    }
+    return *this;
+}
+
+using fRGBA = RGBA<float>;
+
+std::vector<std::shared_ptr<Texture>> WriteFrameBuffer::getWriteBuffers() const {
+    const size_t count = _locations.size();
+    std::vector<std::shared_ptr<Texture>> ret(count);
+    for (int i = 0; i < count; ++i) {
+        ret[i] = std::static_pointer_cast<Texture>(getBuffer(_locations[i]));
+    }
+    return ret;
+}
+
+std::vector<GLenum> WriteFrameBuffer::getWriteLocations() const {
+    return _locations;
+}
+
+WriteFrameBuffer::DrawTexVec WriteFrameBuffer::setWriteBuffers(const std::vector<GLenum>& attchs_) {
+    bind();
+    for (GLenum loc : attchs_) {
+        if (getBuffer(loc)->Target == GL_RENDERBUFFER) {
+            THROW(FrameBufferError(FrameBufferError::INVALID_VALUE,
+                "Cannot write to renderbuffer [ @ Attachment = "+std::to_string(loc)+" ]"
+            ));
+        }
+    }
+    _locations = attchs_;
+    glDrawBuffers(_locations.size(), _locations.data());
+    return getWriteBuffers();
+}
+
+std::shared_ptr<Texture> WriteFrameBuffer::setWriteBuffer(GLenum attch_) {
+    bind();
+    if (attch_ == GL_NONE) {
+        std::vector<GLenum> tmp(_locations.size(), GL_NONE);
+        glDrawBuffers(tmp.size(), tmp.data());
+        _locations = {};
+        return nullptr;
+    }
+    setWriteBuffers({attch_});
+    return std::static_pointer_cast<Texture>(getBuffer(attch_));
+}
+
+fRGBA WriteFrameBuffer::clearColorValue() const {
+    bind();
+    float rgba[4];
+    glGetFloatv(GL_COLOR_CLEAR_VALUE, rgba);
+    return fRGBA{rgba[0], rgba[1], rgba[2], rgba[3]};
+}
+
+fRGBA WriteFrameBuffer::clearColorValue(const fRGBA& color) {
+    declare();
+    glClearColor(color.r, color.g, color.b, color.a);
+    return color;
+} 
+
+fRGBA WriteFrameBuffer::clearColorValue(float r, float g, float b, float a) {
+    return clearColorValue({r, g,b , a});
+}
+
+double WriteFrameBuffer::clearDepthValue() const {
+    bind();
+    double ret;
+    glGetDoublev(GL_DEPTH_CLEAR_VALUE, &ret);
+    return ret;
+}
+
+double WriteFrameBuffer::clearDepthValue(double d_) {
+    declare();
+    glClearDepth(d_);
+    return d_;
+}
+
+GLint WriteFrameBuffer::clearStencilValue() const {
+    bind();
+    GLint ret;
+    glGetIntegerv(GL_STENCIL_CLEAR_VALUE, &ret);
+    return ret;
+}
+
+GLint WriteFrameBuffer::clearStencilValue(GLint s_) {
+    declare();
+    glClearStencil(s_);
+    return s_;
+}
+
+void WriteFrameBuffer::clear(GLbitfield mask_) const {
+    bind();
+    glClear(mask_);
+}
+
+void WriteFrameBuffer::clearDepth() const {
+    clear(GL_DEPTH_BUFFER_BIT);
+}
+
+void WriteFrameBuffer::clearDepth(float val_) const {
+    bind();
+    glClearBufferfv(GL_DEPTH, 0, &val_);
+}
+
+void WriteFrameBuffer::clearStencil() const {
+    clear(GL_STENCIL_BUFFER_BIT);
+}
+
+void WriteFrameBuffer::clearStencil(GLint val_) const {
+    bind();
+    glClearBufferiv(GL_STENCIL, 0, &val_);
+}
+
+void WriteFrameBuffer::clearDepthStencil() const {
+    clear(GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT);
+}
+
+void WriteFrameBuffer::clearDepthStencil(float d_, GLint s_) const {
+    bind();
+    glClearBufferfi(GL_DEPTH_STENCIL, 0, d_, s_);
+}
+
+FrameBuffer::FrameBuffer()
+: FrameBufferBase(GL_FRAMEBUFFER) {}
+
+FrameBuffer& FrameBuffer::operator=(FrameBuffer&& rhs) {
+    if (rhs.id()) {
+        _attachments = rhs._attachments;
+        _location = rhs._location;
+        _locations = rhs._locations;
+        rhs._attachments = {};
+        rhs._locations = {};
+        rhs._location = GL_NONE;
+        OpenGLObject::operator=(std::move(rhs));
+    }
+    return *this;
+}
+
+FrameBuffer& FrameBuffer::operator=(ReadFrameBuffer&& rhs) {
+    ReadFrameBuffer::operator=(std::move(rhs));
+    return *this;
+}
+
+FrameBuffer& FrameBuffer::operator=(WriteFrameBuffer&& rhs) {
+    WriteFrameBuffer::operator=(std::move(rhs));
+    return *this;
+}
+
+} // namespace nb

engine/NBGraphics/src/Image.cpp

@@ -0,0 +1,8 @@
+#include "Image.hpp"
+
+using ImageErrorCodes = nb::ImageError::Codes;
+const std::string nb::ImageError::type = "nb::ImageError";
+const nb::ErrorCodeMap nb::ImageError::ErrorMessages = {
+    { ImageErrorCodes::UNDEFINED, "Error" },
+    {ImageErrorCodes::OUT_OF_BOUNDS, "Out of bounds"}
+};

engine/NBGraphics/src/OGLObjects.cpp

@@ -0,0 +1,23 @@
+#include "OGLObjects.hpp"
+
+namespace nb {
+
+const std::string OGLError::type = "nb::OGLError";
+const ErrorCodeMap OGLError::ErrorMessages = {
+    { OGLError::Codes::UNDEFINED, "Error" },
+    {OGLError::Codes::HANGING_OBJECT, "Attempting to leave a hanging OpenGL object"},
+    {OGLError::Codes::INVALID_OBJECT, "Attempting operation with invalid object"}
+};
+
+OpenGLObject::OpenGLObject(OpenGLObject&& rval) {
+    *this = std::move(rval);
+}
+
+OpenGLObject& OpenGLObject::operator=(OpenGLObject&& rhs) {
+    if (_id) { THROW(OGLError(Codes::HANGING_OBJECT)); }
+    _id = rhs._id;
+    rhs._id = 0;
+    return *this;
+}
+
+} // namespace nb

engine/NBGraphics/src/ProgramPipeline.cpp

@@ -0,0 +1,88 @@
+#include "ProgramPipeline.hpp"
+
+namespace nb{
+
+using ShaderErrCodes = ShaderError::Codes;
+const std::string ShaderError::type = "nb::ShaderError";
+const ErrorCodeMap ShaderError::ErrorMessages = {
+    {ShaderErrCodes::UNDEFINED, "Error"}
+};
+
+using ProgramErrCodes = ProgramError::Codes;
+const std::string ProgramError::type = "nb::ProgramError";
+const ErrorCodeMap ProgramError::ErrorMessages = {
+    {ProgramErrCodes::UNDEFINED, "Error"},
+    {ProgramErrCodes::LINKING_ERROR, "Linker error"}
+};
+
+Shader::Shader(GLenum target_, const std::string& source_) 
+: Shader(target_, std::vector<std::string>({source_})) {}
+
+Shader::Shader(GLenum target_, const std::vector<std::string>& strings_) 
+: target(target_), _sources(strings_) {
+    declare();
+    compile();
+}
+
+Shader::Shader(Shader&& cpy) 
+: target(cpy.target), _success(cpy._success), _sources(cpy._sources) {
+    _id = cpy._id;
+
+    cpy._success = false;
+    cpy._sources = {};
+    cpy._id = 0;
+}
+
+Shader::operator bool() { return success(); }
+
+bool Shader::success() const {
+    return _success;
+}
+
+GLint Shader::status(GLenum parameter) const {
+    GLint param = 0;
+    glGetShaderiv(_id, parameter, &param);
+    return param;
+}
+
+std::string Shader::log() const {
+    GLint logsize = status(GL_INFO_LOG_LENGTH);
+    char* log_ = new char[logsize];
+    glGetShaderInfoLog(_id, logsize, NULL, log_);
+    std::string ret(log_, logsize);
+    delete[] log_;
+    return ret; 
+}
+
+Program::Program(SharedVector<Shader> shaders_) {
+    declare();
+    for (auto shad_ptr : shaders_) {
+        glAttachShader(_id, shad_ptr->id());
+    }
+    glLinkProgram(_id);
+    _success = status(GL_LINK_STATUS);
+    if (!_success) {
+        WARN(log(), 0x0FE);
+    }
+}
+
+Program::operator bool() { return _success; }
+
+GLint Program::status(GLenum parameter) const {
+    GLint param = 0;
+    glGetProgramiv(_id, parameter, &param);
+    return param;
+}
+
+std::string Program::log() const {
+    GLint logsize = status(GL_INFO_LOG_LENGTH);
+    char* log_ = new char[logsize];
+    glGetProgramInfoLog(_id, logsize, NULL, log_);
+    std::string ret(log_, logsize);
+    delete[] log_;
+    return ret; 
+}
+
+
+
+}

engine/NBGraphics/src/Textures.cpp

@@ -0,0 +1,7 @@
+#include "Textures.hpp"
+
+namespace nb {
+
+Texture::Texture(GLenum target_) : Base(target_) {}
+
+} // namespace nb

engine/NBGraphics/src/VAOManager.cpp

@@ -1,225 +0,0 @@
-#include "VAOManager.hpp"
-
-namespace NB {
-
-using BufferManagerPointer = std::shared_ptr<Buffer>;
-
-VAOManager::VAOManager() { glGenVertexArrays(1, &_id); }
-
-VAOManager::VAOManager(
-        std::vector<BufferManagerPointer> vert_bufs,
-        BufferManagerPointer elmt_buf,
-        const VertexAttributeList& vert_attrs
-) : VAOManager() {
-    _elmt_buffer = elmt_buf;
-    for (BufferManagerPointer vb : vert_bufs) {
-        _vert_buffers[vb->id()] = vb;
-    }
-    if (vert_attrs.size()!=0) {
-        generate(vert_attrs);
-    }
-}
-
-VAOManager::VAOManager(VAOManager&& rhs) { *this = std::move(rhs); }
-
-VAOManager& VAOManager::operator=(VAOManager&& rhs) {
-    remove();
-    _vert_buffers = rhs._vert_buffers;
-    _elmt_buffer = rhs._elmt_buffer;
-    _vert_attrs = rhs._vert_attrs;
-    return *this;
-}
-
-VertexAttributeList VAOManager::getLayout() const { return _vert_attrs; }
-
-GLuint VAOManager::id() const { return _id; }
-
-bool VAOManager::isInitialized() const {
-    return _id && glIsVertexArray(_id);
-}
-
-void VAOManager::remove() const {
-    bind();
-    for (int i{0}; i < _vert_attrs.size(); ++i) {
-        glDisableVertexAttribArray(i);
-    }
-    unbind();
-    glDisableVertexAttribArray(_id);
-}
-
-unsigned int VAOManager::vertSize(GLuint id) const {
-    unsigned int size = 0; 
-    for (const VertexAttribute& va : _vert_attrs) {
-        if (va.ptr.buffer == id) {
-            size += va.GLSLSize * GLSLTypeSize(va.GLSLType);
-        }
-    }
-    return size;
-}
-
-std::vector<BufferManagerPointer> VAOManager::getVertexBuffers() const {
-    std::vector<BufferManagerPointer> ret;
-    for (const auto& i : _vert_buffers) {
-        ret.emplace_back(i.second);
-    }
-    return ret;
-}
-
-RawVec VAOManager::attributeData(unsigned int i) {
-    if (i <= _vert_attrs.size()) {
-        throw std::out_of_range("No vertex attribute exists for specified index");
-    }
-    VertexAttribute attr = _vert_attrs[i];
-    BufferManagerPointer buffer = _vert_buffers[attr.ptr.buffer]; 
-    RawVec data = buffer->data();
-    unsigned int attr_size = attr.GLSLSize*GLSLTypeSize(attr.GLSLType);
-    RawVec ret((buffer->size()-attr.ptr.offset-attr_size)*attr_size/attr.ptr.stride);
-    int data_size = data.size();
-    for (int i{0}; i < data_size; ++i) {
-        if (isIndexInVertexAttribute(i, attr)) {
-            ret[i] = data[i];
-        }
-    }
-    return ret;
-}
-
-RawVec VAOManager::attributeData(unsigned int i, const RawVec& new_data) {
-    if (i >= _vert_attrs.size()) {
-        throw std::out_of_range("No vertex attribute exists for specified index.");
-    }
-    VertexAttribute attr = _vert_attrs[i];
-    BufferManagerPointer buffer = _vert_buffers[attr.ptr.buffer]; 
-    unsigned int attr_size = attr.GLSLSize*GLSLTypeSize(attr.GLSLType);
-    unsigned int offset = attr.ptr.offset;
-    unsigned int num_verts = buffer->size() / vertSize(buffer->id());
-    if (num_verts*attr_size != new_data.size()) {
-        // WHY HERE????
-        THROW_VAO_ERROR(
-            "Input data size of " + std::to_string(new_data.size()) 
-            + " does not match data size for requested vertex attribute of total size " + std::to_string(num_verts*attr_size)
-            + "."
-        );
-    }
-    uint64_t pos = uint64_t(new_data.data());
-    for (int i{0}; i<num_verts; i++) {
-        buffer->data((void*)(pos+i*attr_size), offset+i*attr.ptr.stride, attr_size);
-    }
-    return RawVec(new_data);
-}
-
-void VAOManager::bind() const {
-    glBindVertexArray(_id); 
-    if (_elmt_buffer) { _elmt_buffer->bind(); }
-}
-
-void VAOManager::unbind() const {
-    glBindVertexArray(0);
-    if (_elmt_buffer) { _elmt_buffer->unbind(); }
-}
-
-void VAOManager::addVBO(BufferManagerPointer vert_buf) {
-    GLuint vert_id = vert_buf->id();
-    if (_vert_buffers.find(vert_id) == _vert_buffers.end()) {
-        _vert_buffers[vert_buf->id()] = vert_buf;
-    } else {
-        THROW_VAO_ERROR("Attempting to add identical VBO id of " + std::to_string(vert_id) + ".");
-    }
-}
-
-void VAOManager::changeEBO(BufferManagerPointer ebo) {
-    _elmt_buffer = ebo;
-}
-
-VertexAttributeList VAOManager::addVertexAttributes(const VertexAttributeList& vert_attrs) { 
-    VertexAttributeList curr_vas = _vert_attrs;
-    curr_vas.insert(curr_vas.end(), vert_attrs.begin(), vert_attrs.end());
-    try {
-        throw checkValid(curr_vas);
-    } catch (VAOError vaoe) {
-        if (vaoe.error) {
-            THROW_VAO_ERROR(vaoe.what());
-        }
-    }
-    _vert_attrs = curr_vas;
-    generate();
-    return _vert_attrs;
-}
-
-VertexAttributeList VAOManager::addVertexAttributes(VertexAttribute vert_attr) {
-    return addVertexAttributes({vert_attr});
-}
-
-VertexAttributeList VAOManager::generate() {
-    bind();
-    unsigned int num_attrs = _vert_attrs.size();
-    VertexAttribute* va;
-    for (int i = 0; i < num_attrs; ++i) {
-        va = &(_vert_attrs[i]);
-        _vert_buffers[va->ptr.buffer]->bind();
-        glVertexAttribPointer(
-            i,
-            va->GLSLSize,
-            va->GLSLType,
-            va->GLSLNormalization,
-            va->ptr.stride,
-            (void*)va->ptr.offset
-        );
-        glVertexAttribDivisor(i, va->ptr.divisor);
-        glEnableVertexAttribArray(i);
-    }
-    if (_elmt_buffer != nullptr) {
-        _elmt_buffer->bind();
-    }
-    unbind();
-    return _vert_attrs;
-}
-
-VertexAttributeList VAOManager::generate(VertexAttributeList vert_attrs) {
-    try {
-        throw checkValid(vert_attrs);
-    } catch (VAOError vaoe) {
-        if (vaoe.error) {
-            THROW_VAO_ERROR(vaoe.what());
-        }
-    }
-    _vert_attrs.swap(vert_attrs);
-    return generate();
-}
-
-VertexAttributeList VAOManager::changeLayout(unsigned int i, VertexAttributePointer vap) {
-    _vert_attrs[i].ptr = vap;
-    bind();
-    const VertexAttribute* va = &(_vert_attrs[i]);
-    glDisableVertexAttribArray(i);
-    _vert_buffers[va->ptr.buffer]->bind();
-    glVertexAttribPointer(
-        _id,
-        va->GLSLSize,
-        va->GLSLType,
-        va->GLSLNormalization,
-        va->ptr.stride,
-        (void*)va->ptr.offset
-    );
-    glVertexAttribDivisor(i, va->ptr.divisor);
-    glEnableVertexAttribArray(i);
-    unbind();
-    return _vert_attrs;
-}
-
-VAOError VAOManager::checkValid(const VertexAttributeList& vert_attrs) {
-    GLuint va_id;
-    unsigned int num_attrs = vert_attrs.size();
-    for (int i = 0; i < num_attrs; ++i) {
-        va_id = vert_attrs[i].ptr.buffer;
-        if (_vert_buffers.find(va_id) == _vert_buffers.cend()) {
-            return VAOError("Attempting to point to unknown VBO of id " + std::to_string(va_id) + 
-            " at Vertex Attribute " + std::to_string(i) + ".");
-        }
-        if (vert_attrs[i].ptr.stride<0) {
-            return VAOError("Invalid stride value at Vertex Attribute " + std::to_string(i) + ".");
-        }
-    }
-    return VAOError(false);
-}
-
-} // namespace NB

engine/NBGraphics/src/VertexArray.cpp

@@ -0,0 +1,251 @@
+#include "VertexArray.hpp"
+
+namespace nb {
+
+using VAOErrorCodes = VAOError::Codes;
+const std::string VAOError::type = "nb::VAOError";
+const ErrorCodeMap VAOError::ErrorMessages = {
+    { VAOErrorCodes::UNDEFINED, "Error" },
+    { VAOErrorCodes::INVALID_ATTRIBUTE, "Targeting invalid attribute"}
+};
+
+using VertexCodes = VertexError::Codes;
+const std::string  VertexError::type = "nb::VertexError";
+const ErrorCodeMap VertexError::ErrorMessages = {
+    { VertexError::UNDEFINED, "Error" },
+    { VertexError::MISALIGNED_DATA, "Data does not match vertex layout"}
+};
+
+VAO::VAO(const VertexAttributePointerList& attr_ptrs) {
+    attributes(attr_ptrs);
+}
+
+VAO::VAO(VAO&& other) {
+    *this = std::move(other);
+}
+
+VAO& VAO::operator=(VAO&& rhs) {
+    OpenGLObject::operator=(std::move(rhs));
+    _attrs = rhs._attrs;
+    rhs._attrs = {};
+    return *this;
+}
+
+VertexAttributePointerList VAO::attributes() const {
+    return _attrs;
+}
+
+VertexAttributePointerList VAO::attributes(const VertexAttributePointerList& attrs_) {
+    declare();
+    disable();
+    _attrs = attrs_;
+    bind();
+    for (auto attr_ptr : attrs_) {
+        glBindBuffer(GL_ARRAY_BUFFER, attr_ptr.buffer);
+        GLuint idx = attr_ptr.index; 
+        glVertexAttribPointer(
+            idx,
+            attr_ptr.attribute.GLSLSize,
+            attr_ptr.attribute.GLSLType,
+            attr_ptr.attribute.GLSLNormalization,
+            attr_ptr.attribute.layout.stride,
+            (void*)attr_ptr.attribute.layout.offset
+        );
+        glEnableVertexAttribArray(idx);
+    }
+    unbind();
+    return _attrs;
+}
+
+VertexAttributePointer VAO::attr(GLuint idx) const {
+    for (auto attr_ptr : _attrs) {
+        if (idx == attr_ptr.index) {
+            return attr_ptr;
+        }
+    }
+    THROW(VAOError(Codes::INVALID_ATTRIBUTE));
+}
+
+void VAO::enable() const {
+    if (_id) {
+        bind();
+        for(auto attr_ptr : _attrs) {
+            glEnableVertexAttribArray(attr_ptr.index);
+        }
+        unbind();
+    }
+}
+
+void VAO::enable(GLuint idx) const {
+    if(_id) {
+        bind();
+        glEnableVertexAttribArray(attr(idx).index); 
+        unbind();
+    }
+}
+
+void VAO::disable() const {
+    if(_id) {
+        bind();
+        for(auto attr_ptr : _attrs) {
+            glDisableVertexAttribArray(attr_ptr.index); 
+        }
+        unbind();
+    }
+}
+
+void VAO::disable(GLuint idx) const {
+    if(_id) {
+        bind();
+        glDisableVertexAttribArray(attr(idx).index); 
+        unbind();
+    }
+}
+
+VertexGroup::VertexGroup(VertexGroup&& other) {
+    *this = std::move(other);
+}
+
+VertexGroup& VertexGroup::operator=(VertexGroup&& rhs) {
+    _vertex_data = rhs._vertex_data;
+    _ebo = rhs._ebo;
+    _vao = rhs._vao;
+
+    rhs._vertex_data = {};
+    rhs._ebo = nullptr;
+    rhs._vao = nullptr;
+
+    return *this;
+}
+
+void VertexGroup::draw() const {
+    bind();
+    glDrawElements(primitive, _ebo->size(), _ebo->glslType(), 0);
+}
+
+size_t VertexGroup::addBuffer(const VertexData& vertex_data_) {
+    VertexData data = vertex_data_;
+    _vertex_data.emplace_back(data);
+    VertexAttributePointerList attrs = _vao->attributes();
+    GLuint idx = attrs.size();
+    for (const auto& attr : data.attrs) {
+        attrs.emplace_back(
+            VertexAttributePointer{attr, data.vbo->id(),idx}
+        );
+        idx++;
+    }
+    _vao->attributes(attrs);
+    return _vertex_data.size();
+}
+
+size_t VertexGroup::addBuffer(const ByteVector& data_, const VertexAttributeList& attrs_) {
+    return addBuffer({
+        std::make_shared<VBO>(data_),
+        attrs_
+    });
+}
+
+VertexData VertexGroup::getBuffers(size_t idx) {
+    return _vertex_data[idx];
+}
+
+ VertexDataVec VertexGroup::getBuffers() {
+    return _vertex_data;
+}
+
+size_t VertexGroup::setBuffers(const VertexDataVec& vertex_data_) {
+    _vertex_data = vertex_data_;
+    VertexAttributePointerList attr_ptrs;
+    GLuint idx = 0;
+    for (const auto& data : _vertex_data) {
+        for (const auto& attr : data.attrs) {
+            attr_ptrs.emplace_back(
+                VertexAttributePointer{attr, data.vbo->id(), idx}
+            );
+            idx++;
+        }
+    }
+    _vao->attributes(attr_ptrs);
+    return _vertex_data.size();
+}
+
+VertexDataVec VertexGroup::dropBuffers() {
+    auto ret = _vertex_data;
+    setBuffers({});
+    return ret;
+}
+
+VertexData VertexGroup::dropBuffer(size_t idx) {
+    if (idx >= _vertex_data.size()) {
+        THROW(NBError(NBError::INDEX_ERROR));
+    }
+    VertexDataVec tmp;
+    VertexData ret;
+    size_t i = 0;
+    for (auto buf : _vertex_data) {
+        if (i == idx) {
+            ret = tmp[idx];
+        } else {
+            tmp.emplace_back(buf);
+        }
+        i++;
+    }
+    setBuffers(tmp);
+    return ret;
+}
+
+VertexAttributePointer VertexGroup::attribute(size_t idx_) const {
+    return _vao->attr(idx_);
+}
+
+void VertexGroup::enableAttr(GLuint idx) {
+    bind();
+    _vao->enable(idx);
+    unbind();
+}
+
+void VertexGroup::disableAttr(GLuint idx) {
+    bind();
+    _vao->disable(idx);
+    unbind();
+}
+
+void VertexGroup::disableBuffer(size_t idx) {
+    auto buf_idx = _vertex_data[idx].vbo->id();
+    bind();
+    for (auto attr : _vao->attributes()) {
+        if (attr.buffer == buf_idx) {
+            _vao->disable(attr.index);
+        }
+    }
+    unbind();
+}
+
+void VertexGroup::enableBuffer(size_t idx) {
+    auto buf_idx = _vertex_data[idx].vbo->id();
+    bind();
+    for (auto attr : _vao->attributes()) {
+        if (attr.buffer == buf_idx) {
+            _vao->enable(attr.index);
+        }
+    }
+    unbind();
+}
+
+void VertexGroup::enable() { _vao->enable(); }
+
+void VertexGroup::disable() { _vao->disable(); }
+
+std::shared_ptr<EBO> VertexGroup::indices() const { return _ebo; } 
+
+std::shared_ptr<EBO> VertexGroup::indices(const std::vector<uint32_t>& data) {
+    _ebo->data(data);
+    return _ebo;
+}
+
+std::shared_ptr<EBO> VertexGroup::indices(std::shared_ptr<EBO> buffer) {
+    _ebo = buffer;
+    return _ebo;
+}
+
+} // namespace nb

engine/NBGraphics/src/Window.cpp

@@ -16,9 +16,23 @@ static std::map<int, int> defailt_window_hints = {
 #endif
 };
 
-GLError::GLError(const std::string& msg) : std::runtime_error(msg) {}
+using OpenGLErrorCodes = OpenGLError::Codes;
+const std::string OpenGLError::type = "nb::OpenGLError";
+const ErrorCodeMap OpenGLError::ErrorMessages = {
+    {OpenGLErrorCodes::UNDEFINED, "Error"},
+    {OpenGLErrorCodes::INIT_FAILED, "GLFW initialization failed"},
+    {OpenGLErrorCodes::GLFW_INTIALIZED, "GLFW has already been initialized"},
+    {OpenGLErrorCodes::GLAD_FAILED, "GLAD initialization failed"}
+};
 
-WindowError::WindowError(const std::string &msg) : std::runtime_error(msg) {}
+using WindowErrorCodes = WindowError::Codes;
+const std::string WindowError::type = "nb::WindowError";
+const ErrorCodeMap WindowError::ErrorMessages = {
+    {WindowErrorCodes::UNDEFINED, "Error"},
+    {WindowErrorCodes::INITIALIZED_WINDOW, "Window already initialized"},
+    {WindowErrorCodes::NO_GLFW, "GLFW has not been initialized"},
+    {WindowErrorCodes::INIT_FAILED, "Could not intialized window"}
+};
 
 int Window::getGLFWHint(int hint_key) {
     if (GLFWHints.find(hint_key) == GLFWHints.end()) {
@@ -30,7 +44,7 @@ int Window::getGLFWHint(int hint_key) {
 
 int Window::setGLFWHint(int hint_key, int hint_val) {
     if (Window::_glfw_init) {
-        throw GLError("Cannot set GLFW hint after window is initialized.");
+        THROW(OpenGLError(OpenGLErrorCodes::GLFW_INTIALIZED));
     } else {
         GLFWHints[hint_key] = hint_val;
     }
@@ -60,7 +74,7 @@ Window::Window(const uint16_t x, const uint16_t y, const char* initName, GLFWmon
             Window::_glfw_init = true;
         } else {            
             if (Window::StrictInitialization) {
-                throw GLError("Failed to load GLFW with glfwInit()="+std::to_string(glfwResponse)+".");
+                THROW(OpenGLError(OpenGLErrorCodes::INIT_FAILED));
             }
         }
     }
@@ -103,7 +117,7 @@ int Window::getWindowHint(int hint_key) const {
 
 int Window::setWindowHint(int hint_key, int hint_val) {
     if (_init) {
-        throw WindowError("Cannot set window hint after window is initialized.");
+        THROW(WindowError(WindowErrorCodes::INITIALIZED_WINDOW));
     } else {
         windowHints[hint_key] = hint_val;
     }
@@ -112,7 +126,7 @@ int Window::setWindowHint(int hint_key, int hint_val) {
 
 int Window::init() {
     if (!_glfw_init) {
-        throw GLError("GLFW has not been initialized.");
+        THROW(WindowError(WindowErrorCodes::NO_GLFW));
     }
     for (const auto& hint : windowHints) {
         glfwWindowHint(hint.first, hint.second);
@@ -123,7 +137,7 @@ int Window::init() {
         Window::WindowContexts.erase(window);
         if (Window::WindowContexts.size()==0 && Window::_glfw_init) { glfwTerminate(); }
         if (Window::StrictInitialization) {
-            throw WindowError("Could not create window in glfwCreateWindow().");
+            THROW(WindowError(WindowErrorCodes::INIT_FAILED));
         }
     }
     glfwMakeContextCurrent(window);
@@ -133,10 +147,7 @@ int Window::init() {
     if (!gladResponse) {
         Window::checkKillGLFW();
         if (Window::StrictInitialization) {
-            throw GLError("Failed to load GLAD with \
+            THROW(OpenGLError(OpenGLErrorCodes::GLAD_FAILED));
-                gladLoadGLLoader((GLADloadproc)glfwGetProcAddress)="+\
-                std::to_string(gladResponse)+"."
-            );
         }
     }
 

engine/NBGraphics/src/shader.cpp

@@ -1,742 +0,0 @@
-#include "Shader.h"
-
-// #define _PREPROC_FUNC_PARAM_NAMES_ (const ShaderPreprocessor& proc, ShaderUnit& shad, unsigned int linenum, const std::string& line, std::vector<uint8_t>& params)
-
-namespace NB{
-
-File::FilePath get_file_path(std::string name) {
-    const std::vector<char> allowed_special_chars = {
-        '.', '!', '#', '$', '%', '&', '\'', '(', ')', '+', ',', '-', ';', '=', '@', '[', ']', '^', '_', '`', '~' 
-    };
-    std::vector<std::string> path = {""};
-    for (const char c : name) {
-        if (c == '/' || c == '\\') {
-            path.push_back("");
-        } else if (std::isalnum(c)) {
-            path.back() += c;
-        } else {
-            bool spec_char_found = false;
-            for (const char sc : allowed_special_chars) {
-                if (c == sc) {
-                    path.back() += c;
-                    spec_char_found = true;
-                    break;
-                }
-            }
-            if (!spec_char_found) {
-                throw std::runtime_error("'" + name + "' is not valid filepath.");
-            }
-        }
-    }
-    File::FilePath ret;
-    for (const auto& tk : path) {
-        if (tk == path.back()) {
-            size_t period = tk.find(".");
-            if (period == std::string::npos) {
-                ret.basename = tk;
-                ret.ext = "";
-            } else {
-                ret.basename = tk.substr(0, period);
-                ret.ext = tk.substr(period);
-            }
-        } else {
-            ret.dir += tk + "/";
-        }
-    }
-    return ret;
-}
-
-// ShaderPreprocessorError class
-ShaderPreprocessorError::ShaderPreprocessorError(
-    const std::string& msg,
-    const std::string& file,
-    int line
-) : code(Codes::UNDEFINED), std::runtime_error(formatDebugString(msg, file, line)) {}
-
-ShaderPreprocessorError::ShaderPreprocessorError(
-    Codes err_code,
-    const std::string& arg,
-    const std::string& file,
-    int line
-) : code(err_code), std::runtime_error(formatDebugString(errorCodeParser(err_code, arg), file, line)) {}
-
-std::string ShaderPreprocessorError::errorCodeParser(Codes err_code, const std::string& arg) {
-    switch(err_code) {
-        case Codes::FILE_NOT_FOUND:
-            return "File '" + arg + "' not found.";
-        case Codes::BUILTIN_NOT_FOUND:
-            return "Built-in '" + arg + "' not found.";
-        case Codes::CUSTOM:
-        case Codes::UNDEFINED:
-            return arg;
-        case Codes::NONE:
-        default:
-            return "";
-    }
-}
-
-// ShaderError class
-ShaderError::ShaderError(
-    const std::string& msg,
-    const char* shad,
-    const std::string& file,
-    int line
-) : std::runtime_error(formatString(msg, shad, file, line)) {}
-
-std::string ShaderError::formatString(
-    const std::string& msg,
-    const char* shad,
-    const std::string& file,
-    int line
-) {
-    std::stringstream ret;
-    if (file != "") {
-        ret << "In file " << file;
-        if (line >= 0) {
-            ret << " at line " << line;
-        }
-        ret << ":\n\t";
-    }
-    ret << msg;
-    if (shad != nullptr) {
-        ret << " with shader error: " << shad;
-    }
-    return ret.str();
-}
-
-// ShaderPreprocessor class
-std::string ShaderPreprocessor::TokenName(const ShaderPreprocessor::TokenType& x) {
-    switch(x) {
-        case TK:
-            return "Token";
-            break;
-        case DR:
-            return "Directive";
-            break;
-        case WS:
-            return "Whitespace";
-            break;
-        case NL:
-            return "NewLine";
-            break;
-        case LC:
-            return "LineComment";
-            break;
-        case BC:
-            return "BlockComment";
-            break;
-        default:
-            return "Unrecognized";
-            break;
-    }
-}
-
-ShaderPreprocessor::ShaderPreprocessor() {}
-
-File ShaderPreprocessor::loadFromBase(const std::string path, const std::string base) const {
-    File ret;
-    std::ifstream filestream;
-    filestream.open(base + path);
-    if (filestream.is_open()) {
-        ret.path = get_file_path(base + path);
-        ret.src << filestream.rdbuf();
-        return ret;
-    }
-    filestream.close();
-    std::string ext;
-    for (const auto& kv : AcceptedExtensions) {
-        ext = kv.first;
-        filestream.open(base + path + ext);
-        if (filestream.is_open()) {
-            ret.path = get_file_path(base + path + ext);
-            ret.src << filestream.rdbuf();
-            return ret;
-        }
-        filestream.close();
-    }
-    throw ShaderPreprocessorError(Codes::FILE_NOT_FOUND, base + path);
-}
-
-File ShaderPreprocessor::loadFromDirectories(const std::string name) const {
-    File ret;
-    std::ifstream fstream;
-    for (const std::string& path : Directories) {
-        fstream.open(path + name);
-        if (fstream.is_open()) {
-            ret.path = get_file_path(path + name);
-            ret.src << fstream.rdbuf();
-            return ret;
-        }
-        fstream.close();
-    }
-    throw ShaderPreprocessorError(Codes::FILE_NOT_FOUND, name);
-}
-
-File ShaderPreprocessor::load(const std::string path, bool builtin_first) const {
-    if(builtin_first) {
-        return load_BuiltInFirst(path);
-    }
-    return load_FilesFirst(path);
-}
-
-File ShaderPreprocessor::loadFromBuiltIn(const std::string name) const {
-    File ret;
-    //std::stringstream ret;
-    decltype(BuiltIns)::const_iterator builtin_it = BuiltIns.find(name);
-    if (builtin_it != BuiltIns.end()) {
-        ret.path = File::FilePath{"builtin:", name, ""};
-        ret.src << builtin_it->second;
-        return ret;
-    }
-    throw ShaderPreprocessorError(Codes::BUILTIN_NOT_FOUND, name);
-}
-
-File ShaderPreprocessor::load_FilesFirst(const std::string path) const {
-    try {
-        return loadFromBase(path);
-    } catch (ShaderPreprocessorError e) {
-        if (e.code == Codes::FILE_NOT_FOUND) {
-            try {
-                return loadFromDirectories(path);
-            } catch (ShaderPreprocessorError f) {
-                if (f.code == Codes::FILE_NOT_FOUND) {
-                    try {
-                        return loadFromBuiltIn(path);
-                    } catch(ShaderPreprocessorError g) {
-                        if (g.code == Codes::BUILTIN_NOT_FOUND) {
-                            throw ShaderPreprocessorError(Codes::FILE_NOT_FOUND, path);
-                        } else { throw g; }
-                    }
-                } else { throw f; }
-            }
-        } else { throw e; }
-    }
-}
-
-File ShaderPreprocessor::load_BuiltInFirst(const std::string path) const {
-    try {
-        return loadFromBuiltIn(path);
-    } catch (ShaderPreprocessorError f) {
-        if (f.code == Codes::BUILTIN_NOT_FOUND) {
-            try {
-                return loadFromDirectories(path);
-            } catch (ShaderPreprocessorError e) {
-                if (e.code == Codes::FILE_NOT_FOUND) {
-                    return loadFromBase(path);
-                } else {
-                    throw e;
-                }
-            }
-        } else {
-            throw f;
-        }
-    }
-    
-}
-
-std::vector<ShaderPreprocessor::Token> ShaderPreprocessor::tokenize(const std::string& code) const {
-    enum State {
-        FSlash,
-        WhiteSpace,
-        LineComment,
-        BlockComment,
-        BlockCommentEndStar,
-        Directive,
-        Token
-    };
-    
-    std::vector<ShaderPreprocessor::Token> tks;
-    
-    std::string token = "";
-    State state = WhiteSpace;
-    for(char c : code) {
-        if (c==13) {
-            continue;
-        }
-        switch(state) {
-            case WhiteSpace:
-                if (c=='/') {
-                    if (token != "") { tks.push_back({WS, token}); }
-                    token = c;
-                    state = FSlash;
-                } else if (c=='#') {
-                    if (token != "") { tks.push_back({WS, token}); }
-                    token = c;
-                    state = Directive;
-                } else if (c=='\n') {
-                    if (token != "") { tks.push_back({WS, token}); }
-                    tks.push_back({NL, "\n"});
-                    token = "";
-                    state = WhiteSpace;
-                } else if (std::isblank(c)) {
-                    token += c;
-                } else {
-                    if (token != "") { tks.push_back({WS, token}); }
-                    token = c;
-                    state = Token;
-                }
-                break;
-            case FSlash:
-                if (c=='/') {
-                    token += c;
-                    state = LineComment;
-                } else if (c=='*') {
-                    token += c;
-                    state = BlockComment;
-                } else if (c=='\n') {
-                    tks.push_back({TK, token});
-                    tks.push_back({NL, "\n"});
-                    token = "";
-                    state = WhiteSpace;
-                } else if (std::isblank(c)) {
-                    tks.push_back({TK, token});
-                    token = c;
-                }else {
-                    token += c;
-                    state = Token;
-                }
-                break;
-            case LineComment:
-                if (c=='\n') {
-                    tks.push_back({LC, token});
-                    tks.push_back({NL, "\n"});
-                    token = "";
-                    state = WhiteSpace;
-                } else {
-                    token += c;
-                }
-                break;
-            case BlockComment:
-                token += c;
-                if (c=='*') {
-                    state = BlockCommentEndStar;
-                }
-                break;
-            case BlockCommentEndStar:
-                token += c;
-                if (c=='/') {
-                    tks.push_back({BC, token});
-                    token = "";
-                    state = WhiteSpace;
-                } else {
-                    state = BlockComment;
-                }
-                break;
-            case Directive:
-                if (c=='\n') {
-                    tks.push_back({DR, token});
-                    tks.push_back({NL, "\n"});
-                    token = "";
-                    state = WhiteSpace;
-                } else if (c=='/') {
-                    tks.push_back({DR, token});
-                    token = c;
-                    state = FSlash;
-                } else {
-                    token += c;
-                }
-                break;
-            case Token:
-                if (c=='\n') {
-                    tks.push_back({TK, token});
-                    tks.push_back({NL, "\n"});
-                    token = "";
-                    state = WhiteSpace;
-                } else if (std::isblank(c)) {
-                    tks.push_back({TK, token});
-                    token = c;
-                    state = WhiteSpace;
-                } else if (c=='/') {
-                    tks.push_back({TK, token});
-                    token = c;
-                    state = FSlash;
-                }else {
-                    token += c;
-                }
-                break;
-            default:
-                break;
-        }
-        
-    }
-
-    switch(state) {
-        case WhiteSpace:
-            if (token != "") { tks.push_back({WS, token}); }
-        case FSlash:
-            tks.push_back({TK, token});
-            break;
-        case LineComment:
-            tks.push_back({LC, token});
-            break;
-        case BlockComment:
-        case BlockCommentEndStar:
-            tks.push_back({BC, token});
-            break;
-        case Directive:
-            tks.push_back({DR, token});
-            break;
-        case Token:
-            tks.push_back({TK, token});
-            break;
-        default:
-            break;
-    }
-
-    return tks;
-}
-
-ShaderUnit& ShaderPreprocessor::preprocess(const std::string& code, ShaderUnit& shad) const {
-    typedef ShaderPreprocessor::Token Token;
-    std::vector<Token> tks = tokenize(code);
-    
-    for (int i{0}; i < tks.size(); ++i) {
-        switch(tks[i].first) {
-            case DR:
-                directive_dispatch(shad, tks[i].second);
-                break;
-            case TK:
-            case NL:
-            case LC:
-            case BC:
-            case WS:
-            default:
-                shad.preprocSource += tks[i].second;
-                break;
-        }
-    }
-    
-    if (shad.vMajor == 0 && shad.vMinor == 0) {
-        shad.vMajor = 1;
-        shad.vMinor = 10;
-    }
-    return shad;
-}
-
-ShaderUnit ShaderPreprocessor::preprocess(File file, GLenum shader_type) const {
-    ShaderUnit ret;
-    ret.file = file;
-    if (shader_type) {
-        ret.type = shader_type;
-    } else {
-        decltype(AcceptedExtensions.begin()) find_type = AcceptedExtensions.find(file.path.ext);
-        if (find_type != AcceptedExtensions.end()) {
-            ret.type = find_type->second;
-        }
-    }
-    preprocess(file.src.str(), ret);
-    return ret;
-}
-
-ShaderUnit ShaderPreprocessor::preprocess(const std::string& code, GLenum shader_type) const {
-    File local;
-    local.path = File::FilePath{"live:", "live", ".shad"};
-    return preprocess(local, shader_type);
-}
-
-ShaderProgram ShaderPreprocessor::CreateShaderProgram(std::vector<std::string> shads) const {
-    std::vector<ShaderUnit> _shader_units;
-    for (const auto& name : shads) {
-        _shader_units.push_back(preprocess(load(name)));
-    }
-    return ShaderProgram::CreateShaderProgram(_shader_units);
-}
-
-ShaderProgram ShaderPreprocessor::ReloadFromFile(const ShaderProgram& rhs) const {
-    std::vector<std::string> shader_names;
-    shader_names.reserve(rhs._shader_units.size());
-    std::string filename;
-    for (const ShaderUnit& shad : rhs._shader_units) {
-        filename = shad.file.path.dir + shad.file.path.basename + shad.file.path.ext;
-        shader_names.emplace_back(filename);
-    }
-    return CreateShaderProgram(shader_names);
-}
-
-bool ShaderPreprocessor::directive_dispatch(ShaderUnit& shad, const std::string& line) const {
-    StringVec dir_tks = {""};
-    for (char c : line) {
-        if (std::isblank(c)) {
-            if (dir_tks.back() != "") {
-                dir_tks.push_back("");
-            }
-        } else {
-            dir_tks.back() += c;
-        }
-    }
-    if (!dir_tks.size()) { return false; }
-
-    if (dir_tks[0][0] != '#') { return false; }
-
-    if (dir_tks[0] == "#define") {
-        return preprocessor_define(shad, dir_tks, line);
-    } else if (dir_tks[0] == "#version") {
-        return preprocessor_version(shad, dir_tks, line);
-    } else if (dir_tks[0] == "#include") {
-        return preprocessor_include(shad, dir_tks, line);
-    }
-    return false;
-}
-
-typedef std::vector<std::string> StringVec;
-
-bool ShaderPreprocessor::preprocessor_include(
-    ShaderUnit& shad,
-    const StringVec& tokens,
-    const std::string& line
-) const
-{
-    try {
-        if (tokens[0] != "#include") { return false; }
-    } catch (std::out_of_range e) {
-        return false;
-    }
-    std::string path = "";
-    for (const auto& tk : tokens) {
-        if (tk != tokens.front()) {
-            path += tk;
-        }
-    }
-    // Add file-inclusion base + 
-    // Do path cleanup + 
-    // Restructure preprocessing data flow
-    std::string filename = path.substr(1, path.size()-2);
-    try {
-        if (path[0] == '"' && path.back() == '"') {
-            preprocess(load(filename).src.str(), shad);
-            return true;
-        } else if (path[0] == '<' && path.back() == '>') {
-            preprocess(load(filename, true).src.str(), shad);
-            return true;
-        }
-    } catch (ShaderPreprocessorError e) {
-        if (e.code == Codes::FILE_NOT_FOUND) {
-            std::cout << "COULD NOT FIND " << filename << ".\n";
-        } else {
-            throw e;
-        }
-    }
-    return false;
-}
-
-bool ShaderPreprocessor::preprocessor_define(ShaderUnit& shad, const StringVec& tokens, const std::string& line) const {
-    shad.preprocSource += line;
-    try {
-        if (tokens[0] != "#define") { return false; }
-        try {
-            shad.defines[tokens[1]] = tokens[2];
-        } catch (std::length_error& f) {
-            shad.defines[tokens[1]] = "";
-        }
-        return true;
-    } catch (std::out_of_range& e) {
-        return false;
-    }
-}
-
-bool ShaderPreprocessor::preprocessor_version(ShaderUnit& shad, const StringVec& tokens, const std::string& line) const {
-    shad.preprocSource += line;
-    std::cout << "Shader version: ";
-    try {
-        if (tokens[0] != "#version") { return false; }
-        if (tokens[1].size() == 3) {
-            short vMajor = tokens[1][0]-'0';
-            short vMinorA = tokens[1][1]-'0';
-            short vMinorB = tokens[1][2]-'0';
-            if (vMajor > 10 || vMinorA > 10 || vMinorB > 10) {
-                return false;
-            }
-            shad.vMajor = vMajor;
-            shad.vMinor = vMinorA*10 + vMinorB;
-            shad.profile = AcceptedProfiles.at(tokens[2]);
-            std::cout << shad.vMajor << "." << shad.vMinor << "\n";
-            return true;
-        } else {
-            return false;
-        }
-    } catch (std::out_of_range& e) {
-        return false;
-    }
-}
-
-
-/* bool ShaderPreprocessor::preprocessor_uniform(
-    ShaderUnit& shad,
-    const std::string& type,
-    const std::string& name
-) const {
-    std::string type_str = "";
-    unsigned int type_str_len = 0;
-    for (const char& c : type) {
-        if (type_str_len) {
-            if (std::isdigit(c)) {
-                type_str += c;
-                continue;
-            } else if (c=='[') {
-                type_str += '_';
-            }else if (c == ']' || std::isblank(c)){
-                continue;
-            } else {
-                return false;
-            }
-        } else {
-            if (std::isalnum(c)) {
-                type_str += c;
-                continue;
-            } else if (c == '[') {
-                type_str_len = type_str.length();
-                type_str += '_';
-                continue;
-            } else {
-                return false;
-            }
-        }
-    }
-    std::string name_str = "";
-    unsigned int name_str_len = 0;
-    for (const char& c : name) {
-        if (c == ';') {
-            break;
-        }
-        if (name_str_len) {
-            if (std::isdigit(c)) {
-                type_str.insert(type_str_len, 1, c);
-                type_str_len++;
-                continue;
-            } else if (c=='[') {
-                type_str.insert(type_str_len, "_");
-                type_str_len++;
-                continue;
-            }else if (c == ']' || std::isblank(c)){
-                continue;
-            } else {
-                return false;
-            }
-        } else {
-            if (std::isalnum(c)) {
-                name_str += c;
-                continue;
-            } else if ( c == '[') {
-                name_str_len = name_str.length();
-                type_str.insert(type_str_len, "_");
-                type_str_len++;
-                continue;
-            } else {
-                return false;
-            }
-        }
-    }
-    shad.uniforms.push_back(UniformHandle{
-        name_str,
-        type_str,
-        0x0,
-        0x0
-    });
-    return true;
-} */
-
-
-// ShaderProgram
-
-ShaderProgram::ShaderProgram(ShaderProgram&& rhs) {
-    _shader_units = rhs._shader_units;
-    _id = rhs._id;
-    rhs._id = 0;
-}
-
-ShaderProgram::~ShaderProgram() {
-    glDeleteProgram(_id);
-}
-
-ShaderProgram& ShaderProgram::operator=(ShaderProgram&& rhs) {
-    _shader_units = rhs._shader_units;
-    _id = rhs._id;
-    rhs._id = 0;
-    return *this;
-}
-
-
-ShaderProgram ShaderProgram::CreateShaderProgram(std::vector<ShaderUnit>& shaders) {
-    int success;
-    ShaderProgram ret(shaders);
-    char infoLog[512];
-    unsigned int shad_id;
-    std::vector<unsigned int> shad_ids;
-    shad_ids.reserve(shaders.size());
-    for (auto& shad : ret._shader_units) {
-        const char* source = shad.preprocSource.data();
-        shad_id = glCreateShader(shad.type);
-        shad_ids.emplace_back(shad_id);
-        glShaderSource(shad_id, 1, &source, NULL);
-        glCompileShader(shad_id);
-        glGetShaderiv(shad_id, GL_COMPILE_STATUS, &success);
-        if (!success) {
-            glGetShaderInfoLog(shad_id, 512, NULL, infoLog);
-            File::FilePath& fp = shad.file.path;
-            std::string filename = fp.dir + fp.basename + fp.ext;
-            // std::cout << "Could not compile '" + filename + "': " << infoLog << "\n";
-            // return *ret;
-            throw ShaderError("Could not compile '" + filename + "'.", infoLog);
-        }
-    }
-    
-    ret._id = glCreateProgram();
-    for(auto& id : shad_ids) {
-        glAttachShader(ret._id, id);
-    }
-    glLinkProgram(ret._id);
-    glGetProgramiv(ret._id, GL_LINK_STATUS, &success);
-    if (!success) {
-        glGetProgramInfoLog(ret._id, 512, NULL, infoLog);
-        throw ShaderError("Could not link shader program.", infoLog);
-    }
-    for (auto& id : shad_ids) {
-        glDeleteShader(id);
-    }
-    return ret;
-}
-
-unsigned int ShaderProgram::id() const { return _id; }
-
-void ShaderProgram::use() const {
-    glUseProgram(_id);
-}
-
-std::vector<ShaderUnit> ShaderProgram::getShaders() const {
-    return _shader_units;
-}
-
-ShaderUnit ShaderProgram::getShaders(unsigned int idx) const {
-    return _shader_units[idx];
-}
-
-void ShaderProgram::setBool(const std::string& name, bool value) const {
-    glUniform1i(glGetUniformLocation(_id, name.c_str()), (int)value);
-}
-
-void ShaderProgram::setInt(const std::string& name, int value) const {
-    glUniform1i(glGetUniformLocation(_id, name.c_str()), (int)value);
-}
-
-void ShaderProgram::setFloat(const std::string& name, float value) const {
-    glUniform1f(glGetUniformLocation(_id, name.c_str()), (int)value);
-}
-
-void ShaderProgram::setMat4(const std::string& name, glm::mat4& value) const {
-    glUniformMatrix4fv(glGetUniformLocation(_id, name.c_str()), 1, GL_FALSE, glm::value_ptr(value));
-} 
-
-/* // Shader class
-Shader::Shader() { _id = 0x0; }
-
-Shader::Shader(const Shader& cpy_shader) { _id = cpy_shader._id; }
-
-Shader& Shader::operator=(const Shader& cpy_shader) { _id = cpy_shader._id; return *this; }
-
-void Shader::use() const{
-    glUseProgram(_id);
-}
-
-*/
-
-}

engine/NBGraphics/tests/CMakeLists.txt

@@ -0,0 +1,26 @@
+cmake_minimum_required(VERSION 3.26.0)
+
+if (NB_BUILD_TESTS)
+    enable_testing()
+    include(GoogleTest)
+    
+    add_executable(TestWindow
+        ./TestWindow.cpp
+    )
+    target_link_libraries(TestWindow
+        NBCore
+        NBGraphics
+    )
+
+    add_executable(TestImages
+        ./testImages.cpp
+    )
+    target_link_libraries(TestImages
+        NBCore
+        NBGraphics
+        GTest::gtest_main
+    )
+
+    gtest_discover_tests(TestImages)
+
+endif()

engine/NBGraphics/tests/TestWindow.cpp

@@ -0,0 +1,107 @@
+#include "GLLoad.hpp"
+#define STB_IMAGE_IMPLEMENTATION
+#include "stb_image.h"
+
+#include "Image.hpp"
+#include "ProgramPipeline.hpp"
+#include "VertexArray.hpp"
+#include "Window.hpp"
+#include "Textures.hpp"
+
+int main() {
+    nb::logger.log("Howdy!");
+    nb::Window window(400, 400, "Hello!");
+    window.setWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
+    window.setWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
+    window.init();
+
+    auto vert = std::make_shared<nb::Shader>(
+        GL_VERTEX_SHADER,
+        "#version 330 core\n"
+        "layout (location = 0) in vec2 aPos;\n"
+        "layout (location = 1) in vec2 tPos;\n"
+        "out vec2 vPos;\n"
+        "void main()\n"
+        "{\n"
+        "   gl_Position = vec4(aPos.x, aPos.y, 0.0, 1.0);\n"
+        "   vPos = tPos;\n"
+        "}\0"
+    );
+
+    LOG(vert->log());
+
+    auto frag = std::make_shared<nb::Shader>(
+        GL_FRAGMENT_SHADER,
+        "#version 330 core\n"
+        "in vec2 vPos;\n"
+        "out vec4 FragColor;\n"
+        "uniform sampler2D tex;\n"
+        "void main()\n"
+        "{\n"
+        "   FragColor = texture(tex, vPos);\n"
+        "}\n\0"
+    );
+
+    LOG(frag->log());
+
+    nb::ByteVector data = nb::vectorToBytes<float>({
+       -0.5, -0.5, 0,0,
+       -0.5, 0.5, 0,1,
+       0.5, 0.5, 1,1,
+       0.5, -0.5, 1,0
+    });
+
+    nb::Program prog({vert, frag});
+    prog.bind();
+
+    std::vector<uint32_t> indxs = {0, 1, 2, 0, 2, 3};
+
+    nb::VertexGroup tri(data, {
+        nb::VertexAttribute{
+            2,
+            GL_FLOAT,
+            false,
+            {0, 16}
+        },
+        nb::VertexAttribute{
+            2,
+            GL_FLOAT,
+            false,
+            {8, 16}
+        }
+    }, indxs);
+    tri.bind();
+
+    int width, height, numChannels;
+    auto raw_img_data = stbi_load(
+        "./awesomeface.png",
+        &width,
+        &height,
+        &numChannels,
+        0
+    );
+    LOG(numChannels);
+    using RGBA = nb::Pixel<uint8_t, nb::Red, nb::Green, nb::Blue, nb::Alpha>;
+    nb::ImageReference<RGBA> img(width, height, raw_img_data);
+    auto tex = nb::ImageTexture<RGBA>();
+    tex.parameter(GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+    tex.parameter(GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+    tex.setImage(img);
+    tex.bind();
+    tri.bind();
+    LOG(img.at(256, 256).r);
+    stbi_image_free(raw_img_data);
+
+    LOG(prog.log());
+
+    GLFWwindow* window_ptr = window.getWindow();
+    while(!glfwWindowShouldClose(window_ptr)) {
+        glClearColor(0.2f, 0.3f, 0.3f, 1.0f);
+        glClear(GL_COLOR_BUFFER_BIT);
+        tri.draw();
+        glfwPollEvents();
+        glfwSwapBuffers(window_ptr);
+    }    
+
+    return 0;
+}

engine/NBGraphics/tests/testImages.cpp

@@ -0,0 +1,156 @@
+#include <gtest/gtest.h>
+
+#include <vector>
+
+#define STB_IMAGE_IMPLEMENTATION
+#include "stb_image.h"
+
+#include "Image.hpp"
+
+TEST(TestImage, SinglePixel) {
+    using RGB = nb::Pixel<uint8_t, nb::Red, nb::Green, nb::Blue>;
+    RGB p1;
+    p1.r = 0x00;
+    p1.g = 0x0F;
+    p1.b = 0xFF;
+    ASSERT_EQ(p1.r, 0x00);
+    ASSERT_EQ(p1.g, 0x0F);
+    ASSERT_EQ(p1.b, 0xFF);
+    RGB p2(p1);
+    ASSERT_EQ(p2.r, 0x00);
+    ASSERT_EQ(p2.g, 0x0F);
+    ASSERT_EQ(p2.b, 0xFF);
+    RGB p3(0xA, 0xB, 0xC);
+    ASSERT_EQ(p3.r, 0xA);
+    ASSERT_EQ(p3.g, 0xB);
+    ASSERT_EQ(p3.b, 0xC);
+    RGB p4 = p3;
+    ASSERT_EQ(p4.r, 0xA);
+    ASSERT_EQ(p4.g, 0xB);
+    ASSERT_EQ(p4.b, 0xC);
+    RGB p5(0xA0, 0xB0, 0xC0);
+    ASSERT_EQ(p5.r, 0xA0);
+    ASSERT_EQ(p5.g, 0xB0);
+    ASSERT_EQ(p5.b, 0xC0);
+
+    using RBAG = nb::Pixel<float,
+        nb::Red, nb::Blue, nb::Alpha, nb::Green
+    >;
+    float a=0.5, b=0.4, c=0.0, d=0.3;
+    RBAG p6 = {a, b, c, d};
+    ASSERT_EQ(p6.r, a);
+    ASSERT_EQ(p6.b, b);
+    ASSERT_EQ(p6.a, c);
+    ASSERT_EQ(p6.g, d);
+    RBAG p7 = p6;
+    ASSERT_EQ(p7.r, a);
+    ASSERT_EQ(p7.b, b);
+    ASSERT_EQ(p7.a, c);
+    ASSERT_EQ(p7.g, d);
+}
+
+TEST(TestImage, PixelReference) {
+    using RGB = nb::Pixel<uint8_t, nb::Red, nb::Green, nb::Blue>;
+    using RGBRef = nb::PixelReference<RGB>;
+
+    using RBAG = nb::Pixel<float,
+        nb::Red, nb::Blue, nb::Alpha, nb::Green
+    >;
+    using RBAGRef = nb::PixelReference<RBAG>;
+
+    RGB p1{255, 254, 253};
+    RGBRef rp1(p1);
+    ASSERT_EQ(rp1.r, p1.r);
+    ASSERT_EQ(rp1.g, p1.g);
+    ASSERT_EQ(rp1.b, p1.b);
+
+    RGB p2{0xa, 0xb, 0xc};
+    rp1 = p2;
+    ASSERT_EQ(p1.r, p2.r);
+    ASSERT_EQ(p1.g, p2.g);
+    ASSERT_EQ(p1.b, p2.b);
+
+    RGB p3 = rp1;
+    ASSERT_EQ(p3.r, p1.r);
+    ASSERT_EQ(p3.g, p1.g);
+    ASSERT_EQ(p3.b, p1.b);
+
+    RGBRef rp2 = rp1;
+    rp2 = RGB(2, 4, 8);
+    ASSERT_EQ(p1.r, 2);
+    ASSERT_EQ(p1.g, 4);
+    ASSERT_EQ(p1.b, 8);
+
+    int val = 27;
+    rp1.b = val;
+    ASSERT_EQ(rp1.r, p1.r);
+    ASSERT_EQ(rp1.g, p1.g);
+    ASSERT_EQ(rp1.b, p1.b);
+    ASSERT_EQ(p1.b, val);
+}
+
+TEST(TestImage, SimpleImage) {
+    unsigned char data[] = {
+        0x00, 0x00,
+        0x00, 0xFF,
+        0xFF, 0x00,
+        0xFF, 0xFF
+    };
+    using RG = nb::Pixel<uint8_t, nb::Red, nb::Blue>;
+    nb::Image<RG> img(
+        2, 2, data
+    );
+    for (int i = 0; i < sizeof(data); ++i) {
+        ASSERT_EQ(img.data()[i], data[i]);
+    }
+    auto pixel = img.at(0, 1);
+    ASSERT_EQ(pixel.r, data[4]);
+    ASSERT_EQ(pixel.b, data[5]);
+    
+}
+
+TEST(TestImage, LoadImage) {
+    int width, height, numChannels;
+    unsigned char* data = stbi_load(
+        "./awesomeface.png",
+        &width,
+        &height,
+        &numChannels,
+        0  
+    );
+    using RGBA = nb::Pixel<unsigned char, nb::Red, nb::Green, nb::Blue, nb::Alpha>;
+    nb::Image<RGBA> img(
+        width, height, data
+    );
+    for(int i = 0; i < height; ++i) {
+        for (int j = 0; j < width; ++j) {
+            auto pixel = img.at(j, i);
+            ASSERT_EQ(pixel.r, data[4*(i*width+j)]);
+            ASSERT_EQ(pixel.g, data[4*(i*width+j) + 1]);
+            ASSERT_EQ(pixel.b, data[4*(i*width+j) + 2]);
+            ASSERT_EQ(pixel.a, data[4*(i*width+j) + 3]);
+        }
+    }
+    stbi_image_free(data);
+}
+
+TEST(TestImage, ImageBounds) {
+    size_t len = 10;
+    uint8_t val = 0xAA;
+    std::vector<uint8_t> vec(2*len*len, val);
+    using RB = nb::Pixel<uint8_t, nb::Red, nb::Blue>;
+    nb::Image<RB> img(
+        len, len, vec.data()
+    );
+    for (int i=0; i < 15; ++i) {
+        if (i<len) {
+            auto pixel = img.at(len/2, i);
+            ASSERT_EQ(pixel.r, val);
+            ASSERT_EQ(pixel.b, val);
+        } else {
+            ASSERT_THROW(img.at(len/2, i), nb::ImageError);
+            ASSERT_THROW(img.at(i, len/2), nb::ImageError);
+        }
+    }
+
+}