Added very basic SDL2 demo app

project/jni/application/sdl2-demo/main.c

@@ -0,0 +1,64 @@
+// SDL2 Demo by aurelien.esnard@u-bordeaux.fr
+
+#include <SDL.h>
+#include <SDL_image.h>  // required to load transparent texture from PNG
+#include <SDL_ttf.h>    // required to use TTF fonts
+#include <stdbool.h>
+#include <stdio.h>
+#include "model.h"
+
+/* **************************************************************** */
+
+int main(int argc, char* argv[]) {
+  /* initialize SDL2 and some extensions */
+  if (SDL_Init(SDL_INIT_VIDEO) != 0)
+    ERROR("Error: SDL_Init VIDEO (%s)", SDL_GetError());
+  if (IMG_Init(IMG_INIT_PNG & IMG_INIT_PNG) != IMG_INIT_PNG)
+    ERROR("Error: IMG_Init PNG (%s)", SDL_GetError());
+  if (TTF_Init() != 0) ERROR("Error: TTF_Init (%s)", SDL_GetError());
+
+  /* create window and renderer */
+  SDL_Window* win = SDL_CreateWindow(
+      APP_NAME, SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, SCREEN_WIDTH,
+      SCREEN_HEIGHT, SDL_WINDOW_SHOWN | SDL_WINDOW_RESIZABLE);
+  if (!win) ERROR("Error: SDL_CreateWindow (%s)", SDL_GetError());
+  SDL_Renderer* ren = SDL_CreateRenderer(
+      win, -1, SDL_RENDERER_ACCELERATED | SDL_RENDERER_PRESENTVSYNC);
+  if (!ren) ren = SDL_CreateRenderer(win, -1, SDL_RENDERER_SOFTWARE);
+  if (!ren) ERROR("Error: SDL_CreateRenderer (%s)", SDL_GetError());
+
+  /* initialize your environment */
+  Env* env = init(win, ren, argc, argv);
+
+  /* main render loop */
+  SDL_Event e;
+  bool quit = false;
+  while (!quit) {
+    /* manage events */
+    while (SDL_PollEvent(&e)) {
+      /* process your events */
+      quit = process(win, ren, env, &e);
+      if (quit) break;
+    }
+
+    /* background in gray */
+    SDL_SetRenderDrawColor(ren, 0xA0, 0xA0, 0xA0, 0xFF);
+    SDL_RenderClear(ren);
+
+    /* render all what you want */
+    render(win, ren, env);
+    SDL_RenderPresent(ren);
+    SDL_Delay(DELAY);
+  }
+
+  /* clean your environment */
+  clean(win, ren, env);
+
+  SDL_DestroyRenderer(ren);
+  SDL_DestroyWindow(win);
+  IMG_Quit();
+  TTF_Quit();
+  SDL_Quit();
+
+  return EXIT_SUCCESS;
+}