buffer.h

#pragma once
#include <glad/glad.h>
 
namespace Aire {
    class VertexArrayObject;
 
    class Buffer {
    private:
        GLuint handle;
 
    public:
        Buffer(GLsizeiptr bufferSize, const void* data, GLbitfield flags = GL_DYNAMIC_STORAGE_BIT);
 
        void setData(GLintptr offset, GLsizeiptr dataSize, const void* data);
 
        void bindUniform(GLuint index, GLintptr offset, GLsizeiptr size);
 
        void bindShaderStorage(GLuint index, GLintptr offset, GLsizeiptr size);
 
        void bindTransformFeedback(GLuint index, GLintptr offset, GLsizeiptr size);
 
        void bindAtomicCounter(GLuint index, GLintptr offset, GLsizeiptr size);
 
        void bindVertAttrib(const VertexArrayObject& vao, GLuint bindingPoint, GLintptr offset, GLsizei stride);
 
        void bindElementBuffer(const VertexArrayObject& vao);
 
        GLuint getHandle() const;
 
        GLint64 getSize() const;
 
        ~Buffer();
 
        // Delete copy constructor and assignment operator.
        Buffer(const Buffer&) = delete;
        Buffer& operator=(const Buffer&) = delete;
 
    private:
        // Utility function to initialize an OpenGL buffer.
        // @param bufferSize The size of the buffer to be allocated. Cannot be changed later.
        // @param data A pointer to the data to be copied to the buffer. nullptr if data is not available yet.
        // @param flags Flags used for buffer creation. See: https://registry.khronos.org/OpenGL-Refpages/gl4/html/glBufferStorage.xhtml
        void init(GLsizeiptr bufferSize, const void* data, GLbitfield flags);
 
        void bind(GLenum target, GLuint index, GLintptr offset, GLsizeiptr size);
    };
 
    //##########################################//
    //######## INLINE DEFINITIONS BELOW ########//
    //##########################################//
 
    inline void Buffer::bindShaderStorage(GLuint index, GLintptr offset, GLsizeiptr size) {
        bind(GL_SHADER_STORAGE_BUFFER, index, offset, size);
    }
 
    inline void Buffer::bindTransformFeedback(GLuint index, GLintptr offset, GLsizeiptr size) {
        bind(GL_TRANSFORM_FEEDBACK_BUFFER, index, offset, size);
    }
 
    inline void Buffer::bindAtomicCounter(GLuint index, GLintptr offset, GLsizeiptr size) {
        bind(GL_ATOMIC_COUNTER_BUFFER, index, offset, size);
    }
 
    inline GLuint Buffer::getHandle() const {
        return handle;
    }
}