I've got a problem with the SDL_image library. I wrote a simple program loading a spritesheet and animating it on left-click. Here's the code:
#include <SDL2/SDL.h>
#include <SDL2/SDL_image.h>
const int sw=800;
const int sh=450;
int main(){
SDL_Init(SDL_INIT_EVERYTHING);
IMG_Init(IMG_INIT_PNG);
bool quit=false;
bool shoot=false;
SDL_Event event;
Uint32 time;
unsigned char frame=0;
SDL_Window* window = SDL_CreateWindow("Sprite",SDL_WINDOWPOS_UNDEFINED,SDL_WINDOWPOS_UNDEFINED,sw,sh,0);
SDL_Renderer* render = SDL_CreateRenderer(window,-1,0);
SDL_Surface* image = IMG_Load("p_pt_12.png");
printf("IMG_Load: %s\n", IMG_GetError());
SDL_Texture* texture = SDL_CreateTextureFromSurface(render, image);
while(!quit){
if(shoot){
time=SDL_GetTicks();
time/=(750/5);
frame=time%5;
if(frame==4){
frame = 0;
shoot=false;
}
}
SDL_Rect srcrect = { frame*96,0,96,96};
SDL_Rect dstrect = { (sw-96)/2, (sh-96)/2, 96, 96 };
SDL_PollEvent(&event);
switch (event.type){
case SDL_QUIT:
quit = true;
break;
case SDL_MOUSEBUTTONDOWN:
if(event.button.button == SDL_BUTTON_LEFT) shoot = true;
break;
}
SDL_RenderClear(render);
SDL_RenderCopy(render, texture,&srcrect,&dstrect);
SDL_RenderPresent(render);
}
SDL_DestroyTexture(texture);
SDL_FreeSurface(image);
SDL_DestroyRenderer(render);
SDL_DestroyWindow(window);
IMG_Quit();
SDL_Quit();
return 0;
}
The problem is when I try to run it, IMG_Load() returns NULL pointer and IMG_GetError() says "Unsupported file format". The spritesheet is a .png file, but the same happens with .jpg spritesheet. I'm sure, that the code is correct, because it works on other device with exactly the same image file like a charm. I've tried reinstalling SDL and SDL_image, but it doesn't work. SDL_RWops and IMG_LoadPNG_RW doesn't help neither. I'm using Eclipse Kepler SR2 (but I've also tried to run it with Code::Blocks 12.11 with the same result) on 64-bit Linux Mint.
I will appreciate any kind of help, thanks!
Your code is correct and works for me. Probably your system is missing some libraries needed by sdl_image to handle images, such as libpng and zlib. Install them and let us know if it worked.