Question

How to load image with SDL2 in C

Answer 1

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

void init() {
    if (SDL_Init(SDL_INIT_EVERYTHING) != 0) {
        printf("SDL_Init Error: %s\n", SDL_GetError());
        exit(0);
    }

    IMG_Init(IMG_INIT_JPG);
}

int main(int argc, char* argv[]) {
    init();

    SDL_Window* window = SDL_CreateWindow("SDL2 Display Image",
        SDL_WINDOWPOS_CENTERED,
        SDL_WINDOWPOS_CENTERED,
        800, 600, SDL_WINDOW_SHOWN);

    SDL_Renderer* renderer = SDL_CreateRenderer(window, -1, 0);
    char* filename = "d:\\p2232h.jpg";
    SDL_Surface* image = IMG_Load(filename);
    if (image == NULL) {
        printf("IMG_Load Error: %s\n", IMG_GetError());
    }
    SDL_Texture* texture = SDL_CreateTextureFromSurface(renderer, image);

    // event loop
    bool close = false;
    while (!close) {
        SDL_Event event;
        while (SDL_PollEvent(&event)) {
            switch (event.type) {

            case SDL_QUIT:
                close = true;
                break;
            }
        }
        SDL_RenderCopy(renderer, texture, NULL, NULL);
        SDL_RenderPresent(renderer);
    }

    // free 
    SDL_DestroyTexture(texture);
    SDL_FreeSurface(image);
    SDL_DestroyRenderer(renderer);
    SDL_DestroyWindow(window);

    SDL_Quit();

    return 0;
}

 

70+ SQL courses for beginners and professionals