Basic bgfx + SDL2 example in C

main.c

#include <stdio.h>
#include <stdbool.h>
#include "SDL2/SDL.h"
#include "SDL2/SDL_syswm.h"
#include "bgfx/c99/bgfx.h"

const int SCREEN_WIDTH = 640;
const int SCREEN_HEIGHT = 480;

int
main()
{
	SDL_Window* window = NULL;

	SDL_Surface* screenSurface = NULL;

	if(SDL_Init(SDL_INIT_VIDEO) < 0)
	{
		printf("SDL could not initialize! SDL_Error: %s\n", SDL_GetError());
		exit(EXIT_FAILURE);
	}
	window = SDL_CreateWindow(
			"SDL Tutorial",
			SDL_WINDOWPOS_UNDEFINED,
			SDL_WINDOWPOS_UNDEFINED,
			SCREEN_WIDTH,
			SCREEN_HEIGHT,
			SDL_WINDOW_SHOWN
			);
	if(window == NULL)
	{
		printf("Window could not be created! SDL_Error %s\n", SDL_GetError());
		exit(EXIT_FAILURE);
	}

	SDL_SysWMinfo wmi;
	SDL_VERSION(&wmi.version);
	if (!SDL_GetWindowWMInfo(window, &wmi)) {
    		printf("SDL_Error %s\n", SDL_GetError());
		exit(EXIT_FAILURE);
	}

	bgfx_render_frame(-1);

	bgfx_platform_data_t pd;
	memset(&pd, 0, sizeof(bgfx_platform_data_t));

	pd.ndt = wmi.info.x11.display;
	pd.nwh = (void*)(uintptr_t)wmi.info.x11.window;

	bgfx_init_t init = {0};
	bgfx_init_ctor(&init);
	init.type = BGFX_RENDERER_TYPE_COUNT; // auto determine renderer
	init.resolution.width = SCREEN_WIDTH;
	init.resolution.height = SCREEN_HEIGHT;
	init.resolution.reset = BGFX_RESET_VSYNC;
	init.platformData = pd;
	bgfx_init(&init);

	bgfx_reset(SCREEN_WIDTH, SCREEN_HEIGHT, BGFX_RESET_VSYNC, init.resolution.format);

	bgfx_set_debug(BGFX_DEBUG_TEXT);

	bgfx_set_view_clear(
      			0,
			BGFX_CLEAR_COLOR | BGFX_CLEAR_DEPTH,
			0x443355FF,
      			1.0f,
      			0
      			);
	bgfx_set_view_rect(0, 0, 0, SCREEN_WIDTH, SCREEN_HEIGHT);

	bgfx_touch(0);

	bgfx_frame(false);

	SDL_Event e;
	bool quit = false;
	while(!quit)
	{
		while(SDL_PollEvent(&e))
		{
			if(e.type == SDL_QUIT)
			{
				quit = true;
			}
		}
		bgfx_dbg_text_printf(0, 2, 0x6f, "Description: Initialization and debug text.");
		bgfx_touch(0);
		bgfx_frame(false);
	}

	bgfx_shutdown();
	SDL_DestroyWindow(window);
	SDL_Quit();
  
	return 0;
}