display_manager_fb.h

//
// Copyright (c) 2025, Astute Systems PTY LTD
//
// This file is part of the VivoeX project developed by Astute Systems.
//
// Licensed under the Attribution-NonCommercial 4.0 International (CC BY-NC 4.0)
// License. See the LICENSE file in the project root for full license details.
//
 
#ifndef HARDWARE_DISPLAY_MANAGER_FB_H_
#define HARDWARE_DISPLAY_MANAGER_FB_H_
 
#include <errno.h>
#include <fcntl.h>
#include <linux/fb.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/ioctl.h>
#include <sys/mman.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>
 
#include <string>
#include <vector>
 
#include "common/datatypes.h"
#include "renderer/display_manager_base.h"
 
namespace mediax::fb {
 
class DisplayManager : public mediax::DisplayManagerBase {
 public:
  DisplayManager() = default;
 
  ~DisplayManager();
 
  DisplayManager(const DisplayManager &) = delete;
 
  DisplayManager &operator=(const DisplayManager &) = delete;
 
  Status Initalise() override;
 
  void Run() override{};
 
  Resolution GetResolution() override;
 
  int GetBytesPerPixel() final { return 3; }
 
  mediax::rtp::ColourspaceType GetColourspace() final { return mediax::rtp::ColourspaceType::kColourspaceRgb24; }
 
  Status DisplayBuffer(uint8_t *frame_buffer, Resolution resolution, std::string text) override;
 
  void Flush() override;
 
 private:
  std::string fb_name_ = "/dev/fb0";
  void *frame_buffer_;
  struct fb_fix_screeninfo fix_info_;
  struct fb_var_screeninfo var_info_;
  int32_t frame_buffer_frame_device_;
  bool initaliased_ = false;
};
 
}  // namespace mediax::fb
 
#endif  // HARDWARE_DISPLAY_MANAGER_FB_H_