display_manager_sdl.h

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//
// 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_SDL_H_
#define HARDWARE_DISPLAY_MANAGER_SDL_H_
 
// SDL2 Direct Rendering Manager
#include <SDL2/SDL.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 <cstdint>
#include <mutex>
#include <string>
#include <vector>
 
#include "common/datatypes.h"
#include "renderer/display_manager_base.h"
 
namespace mediax::sdl {
 
class DisplayManager : public mediax::DisplayManagerBase {
 public:
  DisplayManager(std::string name = "");
 
  ~DisplayManager();
 
  DisplayManager(const DisplayManager &) = delete;
 
  DisplayManager &operator=(const DisplayManager &) = delete;
 
  Status Initalise(uint32_t width, uint32_t height, bool fullscreen);
  Status Initalise() override;
 
  Resolution GetResolution() override;
 
  int GetBytesPerPixel() final { return 4; }
 
  mediax::rtp::ColourspaceType GetColourspace() final { return mediax::rtp::ColourspaceType::kColourspaceRgba; }
 
  Status DisplayBuffer(uint8_t *frame_buffer, Resolution resolution, std::string text) override;
 
  void Flush() override;
 
  void ToggleFullscreen() override;
 
  void Run() override;
 
  void Stop() override;
 
  static std::string text_;
 
 private:
  static std::vector<uint8_t> frame_buffer_;
  static int width_;
  static int height_;
  bool initaliased_ = false;
  static std::mutex frame_buffer_mutex_;
  static std::vector<uint8_t> draw_buffer_;
  SDL_Window *window_ = nullptr;
  SDL_Surface *surface_ = nullptr;
  SDL_Renderer *renderer_ = nullptr;
  static SDL_Texture *texture_;
  SDL_Rect texr_ = {0, 0, 0, 0};
  static bool running_;
  static int fullscreen_;
};
 
}  // namespace mediax::sdl
 
#endif  // HARDWARE_DISPLAY_MANAGER_SDL_H_