Draw a texture with SDL2

second_sdl.c

#define SDL_MAIN_HANDLED

#ifdef _WIN32
#include <SDL.h>
#else
#include <SDL2/SDL.h>
#endif

#include <stdio.h>

int main(int argc, char* argv[]) {
    SDL_Window *win = NULL;
    SDL_Renderer *renderer = NULL;
    SDL_Texture *bitmapTex = NULL;
    SDL_Surface *bitmapSurface = NULL;
    int posX = 100, posY = 100, width = 320, height = 240;

    SDL_Rect rect;
    rect.x = 100;
    rect.y = 100;
    rect.w = 200;
    rect.h = 100;

    SDL_Init(SDL_INIT_VIDEO);

    win = SDL_CreateWindow("Hello World", posX, posY, width, height, 0);
    if (!win)
    {
	    fprintf(stderr,"ERROR: %s\n", SDL_GetError());
	    return -1;
    }

    renderer = SDL_CreateRenderer(win, -1, SDL_RENDERER_ACCELERATED);
    if (!renderer)
    {
	goto error0;
    }

    bitmapSurface = SDL_LoadBMP("face.bmp");
    if (!bitmapSurface)
    {
	    goto error1;
    }
    bitmapTex = SDL_CreateTextureFromSurface(renderer, bitmapSurface);
    SDL_FreeSurface(bitmapSurface);
    // postpone rollbacking to allow freeing the surface
    if (!bitmapTex)
	    goto error2;

    while (1) {
        SDL_Event e;
        if (SDL_PollEvent(&e)) {
            if (e.type == SDL_QUIT) {
                break;
            }
        }

        SDL_RenderClear(renderer);
        SDL_RenderCopy(renderer, bitmapTex, NULL, &rect);
        SDL_RenderPresent(renderer);
    }

error2:
    SDL_DestroyTexture(bitmapTex);
error1:
    SDL_DestroyRenderer(renderer);
error0:
    SDL_DestroyWindow(win);

    SDL_Quit();

    return 0;
}