DOKK / manpages / debian 13 / libsdl3-doc / SDL_ISPIXELFORMAT_FOURCC.3.en
SDL_ISPIXELFORMAT_FOURCC(3) SDL3 FUNCTIONS SDL_ISPIXELFORMAT_FOURCC(3)

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.

SDL 3.2.10 Simple Directmedia Layer