buffer.cpp

// SPDX-License-Identifier: MIT
// Author:  Giovanni Santini
// Mail:    giovanni.santini@proton.me
// Github:  @San7o
 
#include <brenta/renderer/opengl/buffer.hpp>
#include <brenta/logger.hpp>
 
using namespace brenta;
 
int Buffer::tot_memory = 0;
 
Buffer::Buffer(Buffer::Target target)
{
  this->init(target);
  return;
}
 
Buffer::~Buffer()
{
  this->destroy();
  return;
}
 
void Buffer::init(Buffer::Target target)
{
  this->target = target;
  glGenBuffers(1, &id);
  
  EVENT(Logger::Event::Lifetime, "buffer: initialized {}", this->id);
  return;
}
 
void Buffer::destroy()
{
  if (this->id == 0) return;
 
  glDeleteBuffers(1, &this->id);
 
  // Update memory for profiling
  Buffer::tot_memory -= this->memory;
  this->memory = 0;
 
  EVENT(Logger::Event::Lifetime, "buffer: destroyed {}", this->id);
  this->id = 0;
  return;
}
 
void Buffer::bind() const
{
  if (this->id == 0)
  {
    ERROR("Buffer::bind: not initialized");
    return;
  }
  glBindBuffer(this->target, this->id);
  return;
}
 
void Buffer::unbind() const
{
  glBindBuffer(this->target, 0);
  return;
}
 
Buffer::Id Buffer::get_id() const
{
  return this->id;
}
 
Buffer::Target &Buffer::get_target()
{
  return this->target;
}
 
void Buffer::set_id(Buffer::Id id)
{
  this->id = id;
}
 
void Buffer::set_target(Buffer::Target target)
{
  this->target = target;
}
 
void Buffer::copy_data(const void *data, GLsizeiptr size,
                       Buffer::DataUsage usage)
{
  glBufferData(this->target, size, data, (GLenum) usage);
 
  // Update memory for profiling
  Buffer::tot_memory -= this->memory;
  this->memory        = size;
  Buffer::tot_memory += size;
  return;
}