Zooming In SDL 2.0

Question

I'm currently working on a project in which I render pictures raw. That is I use simple IMG_LoadTexture(), SDL_RenderCopy(). I want the program to be able to zoom in/out and textures to be scaled to screenwidth/height. I googled it but most of the answers for this question was outdated. Can I achieve this in SDL2. If not what's the way of doing this.

Answer 1

By using SDL_RenderCopy you can do all the zoom in/out or scaling stuff, by using non null values for the srcrect and dstrect parameters.

Here is the prototype of the function :

int SDL_RenderCopy(SDL_Renderer*   renderer,
                   SDL_Texture*    texture,
                   const SDL_Rect* srcrect,
                   const SDL_Rect* dstrect)

So you just need to create two SDL_Rect and setup them accordingly.