SDL_PixelFormatDetails.3type - Man Page

#include <SDL3/SDL_pixels.h>

typedef struct SDL_PixelFormatDetails
{
    SDL_PixelFormat format;
    Uint8 bits_per_pixel;
    Uint8 bytes_per_pixel;
    Uint8 padding[2];
    Uint32 Rmask;
    Uint32 Gmask;
    Uint32 Bmask;
    Uint32 Amask;
    Uint8 Rbits;
    Uint8 Gbits;
    Uint8 Bbits;
    Uint8 Abits;
    Uint8 Rshift;
    Uint8 Gshift;
    Uint8 Bshift;
    Uint8 Ashift;
} SDL_PixelFormatDetails;

This struct is available since SDL 3.2.0.