How to alter image pixels of a wild life bird?
- by NoobScratcher
Hello so I was hoping someone knew how to move or change color and position actual image pixels and could explain and show the code to do so.
I know how to write pixels on a surface or screen-surface
usigned int *ptr = static_cast <unsigned int *> (screen-pixels);
int offset = y * (screen->pitch / sizeof(unsigned int));
ptr[offset + x] = color;
But I don't know how to alter or manipulate a image pixel of a png image my thoughts on this was
How do I get the values and locations of pixels and what do I have to write to make it happen?
Then how do I actually change the values or locations of those gotten pixels and how do I make that happen?
any ideas tip suggestions are also welcome!
int main(int argc , char *argv[])
{
SDL_Surface *Screen = SDL_SetVideoMode(640,480,32,SDL_SWSURFACE);
SDL_Surface *Image;
Image = IMG_Load("image.png");
bool done = false;
SDL_Event event;
while(!done)
{
SDL_FillRect(Screen,NULL,(0,0,0));
SDL_BlitSurface(Image,NULL,Screen,NULL);
while(SDL_PollEvent(&event))
{
switch(event.type)
{
case SDL_QUIT:
return 0;
break;
}
}
SDL_Flip(Screen);
}
return 0;
}
