SDL_SetWindowOpacity - Set the opacity for a window.

       This function is available since SDL 3.2.0.

       The parameter opacity will be clamped internally between 0.0f (transparent) and 1.0f (opaque).

       This function also returns false if setting the opacity isn't supported.

window the window which will be made transparent or opaque.

       opacity
              the opacity value (0.0f - transparent, 1.0f - opaque).

       Defined in SDL3/SDL_video.h

       SDL_SetWindowOpacity - Set the opacity for a window.

       Returns true on success or false on failure; call

       SDL_GetError () for more information.

•(3), SDL_GetWindowOpacity(3)

Simple Directmedia Layer                           SDL 3.2.10                            SDL_SetWindowOpacity(3)

#include"SDL3/SDL.h"boolSDL_SetWindowOpacity(SDL_Window*window,floatopacity);

       This function should only be called on the main thread.