SDL_ISPIXELFORMAT_FOURCC - Man Page

SDL_ISPIXELFORMAT_FOURCC — A macro to determine if an SDL_PixelFormat
is a "FourCC" format.

Defined in SDL3/SDL_pixels.h

#include "SDL3/SDL.h"

#define SDL_ISPIXELFORMAT_FOURCC(format)  /* The flag is set to 1 because 0x1? is not in the printable ASCII range */ .BI ((format)&&(SDL_PIXELFLAG(format)!=1))

This covers custom and other unusual formats.

Note that this macro double-evaluates its parameter, so do not use expressions with side-effects here.

Returns true if the format has alpha, false otherwise.

It is safe to call this macro from any thread.

This macro is available since SDL 3.2.0.