main.c

#include <SDL.h>
#include <SDL_image.h>

int main(int argc, char *argv[])
{
    SDL_Init(SDL_INIT_VIDEO | SDL_INIT_GAMECONTROLLER);

    // Enable png support for SDL2_image
    IMG_Init(IMG_INIT_PNG);

    SDL_Window * window = SDL_CreateWindow(
        "window",
        SDL_WINDOWPOS_UNDEFINED,
        SDL_WINDOWPOS_UNDEFINED,
        480,
        272,
        0
    );

    SDL_Renderer * renderer = SDL_CreateRenderer(window, -1, SDL_RENDERER_ACCELERATED);

    // Load the texture
    SDL_Surface * pixels = IMG_Load("grass.png");
    SDL_Texture * sprite = SDL_CreateTextureFromSurface(renderer, pixels);
    SDL_FreeSurface(pixels);

    // Store the dimensions of the texture
    SDL_Rect sprite_rect;
    SDL_QueryTexture(sprite, NULL, NULL, &sprite_rect.w, &sprite_rect.h);

    // Set the position to draw to in the middle of the screen
    sprite_rect.x = 480/2 - sprite_rect.w/2;
    sprite_rect.y = 272/2 - sprite_rect.h/2;

    int running = 1;
    SDL_Event event;
    while (running) { 
        // Process input
        if (SDL_PollEvent(&event)) {
            switch (event.type) {
                case SDL_QUIT:
                    // End the loop if the programs is being closed
                    running = 0;
                    break;
                case SDL_CONTROLLERDEVICEADDED:
                    // Connect a controller when it is connected
                    SDL_GameControllerOpen(event.cdevice.which);
                    break;
                case SDL_CONTROLLERBUTTONDOWN:
                    if(event.cbutton.button == SDL_CONTROLLER_BUTTON_START) {
                        // Close the program if start is pressed
                        running = 0;
                    }
                    break;
            }
        }

        // Clear the screen
        SDL_RenderClear(renderer);

        // Draw the 'grass' sprite
        SDL_RenderCopy(renderer, sprite, NULL, &sprite_rect);

        // Draw everything on a white background
        SDL_SetRenderDrawColor(renderer, 255, 255, 255, 255);
        SDL_RenderPresent(renderer);
    }
    SDL_DestroyRenderer(renderer);
    SDL_DestroyWindow(window);
    SDL_Quit();

    return 0;
}