show img bmp

bocm.c

@@ -4,36 +4,61 @@
 const int screenWidth = 800;
 const int screenHeight = 600;
 
-int main(void) {
-  SDL_Window *window;
-  SDL_Renderer *render;
-  SDL_Event event;
-  SDL_Init(SDL_INIT_VIDEO);
-
-  window = SDL_CreateWindow("BOCM",100,100,screenWidth,screenHeight,SDL_WINDOW_OPENGL);
-  render = SDL_CreateRenderer(window, -1, 0);
-  SDL_SetRenderDrawColor(render, 255, 0, 0, 255);
-  SDL_RenderClear(render);
-  SDL_RenderPresent(render);
-
-
-
-  bool q = false;
-
-  while (!q) {
-    SDL_WaitEvent(&event);
-    switch (event.type) {
-      case SDL_QUIT:
-        q = true;
-        break;
-      case SDL_KEYDOWN:
-        switch (event.key.keysym.sym) {
-          case SDLK_ESCAPE:
-          q = true;
-          break;
-        }
-    }
+int throw_sdl_err(const char* fmt)
+{
+  SDL_LogError(
+    SDL_LOG_CATEGORY_APPLICATION,
+    fmt,
+    SDL_GetError()
+  );
+  return 3;
+}
+
+int main(int argc, char** argv) {
+
+  SDL_Window*     window;
+  SDL_Renderer*   renderer;
+  SDL_Surface*    surface;
+  SDL_Texture*    texture;
+  SDL_Event       event;
+
+  if (SDL_Init(SDL_INIT_VIDEO) < 0) {
+    return throw_sdl_err("Could not init the SDL: %s");
+  }
+
+  if (SDL_CreateWindowAndRenderer(screenWidth, screenHeight, SDL_WINDOW_OPENGL, &window, &renderer)) {
+    return throw_sdl_err("Could not create new window and renderer: %s");
+  }
+
+  surface = SDL_LoadBMP("imgs/bocm.bmp");
+  if (!surface) {
+    return throw_sdl_err("Could not load BMP image: %s");
+  }
+
+  texture = SDL_CreateTextureFromSurface(renderer, surface);
+  if (!texture) {
+    return throw_sdl_err("Could not create new texture from surface: %s");
   }
 
+  SDL_FreeSurface(surface); // free a RGB surface
+
+  while (1) {
+    SDL_PollEvent(&event);
+    if (event.type == SDL_QUIT) {
+      break;
+    } // break the loop
+
+    SDL_SetRenderDrawColor(renderer, 255, 0, 0, 255);
+    SDL_RenderClear(renderer);
+    SDL_Rect rect = {10, 10, 100, 73};
+    SDL_RenderCopy(renderer, texture, NULL, &rect);
+    SDL_RenderPresent(renderer);
+    } // window loop
+
+  SDL_DestroyTexture(texture);
+  SDL_DestroyRenderer(renderer);
+  SDL_DestroyWindow(window);
+
+  SDL_Quit();
   return 0;
 }