Add main file

- Specify image in args
- Override support
- SDL usage

src/main.cpp

@@ -0,0 +1,46 @@
+#include <SDL_image.h>
+#include <iostream>
+#include <fstream>
+
+int main(int argc, char const *argv[]) {
+    if(argc != 2) {
+        std::cerr << "Aucune image renseignée." << std::endl;
+        std::cerr << "Usage : " << argv[0] << " image" << std::endl;
+        return 1;
+    }
+
+    SDL_Surface * s;
+    if((s = IMG_Load(argv[1])) == NULL) {
+        std::cerr << "Impossible de charger l'image." << std::endl;
+        return 1;
+    }
+
+    // TODO: Faire une vraie compression
+    /* if(SDL_LockSurface(s) == 0) {
+        SDL_memset(s->pixels, static_cast<int>(SDL_MapRGB(s->format, 0, 0, 0)), static_cast<size_t>(s->h * s->pitch));
+        SDL_UnlockSurface(s);
+    } else {
+        std::cerr << "Impossible de modifier l'image (" << SDL_GetError() << ")." << std::endl;
+        return 1;
+    } */
+
+    std::string chemin_image("test.bmp");
+    if(std::ifstream(chemin_image).is_open()) {
+        char choix;
+        do {
+            std::cout << "Le fichier existe déjà, voulez vous l'écraser ? y/n" << std::endl;
+            std::cin >> choix;
+            choix = tolower(choix);
+        } while(choix != 'n' && choix != 'y' && choix != 'o');
+        if(choix == 'y' || choix == 'o') {
+            SDL_SaveBMP(s, chemin_image.c_str());
+        } else {
+            std::cout << "Passe..." << std::endl;
+        }
+    } else {
+        SDL_SaveBMP(s, chemin_image.c_str());
+    }
+
+    SDL_FreeSurface(s);
+    return 0;
+}