NAME

       SDL_ISPIXELFORMAT_ALPHA - A macro to determine if an SDL_PixelFormat has an alpha channel.

SYNOPSIS

       #include <SDL3/SDL_pixels.h>

       #define SDL_ISPIXELFORMAT_ALPHA(format)   \
           ((SDL_ISPIXELFORMAT_PACKED(format) && \
             ((SDL_PIXELORDER(format) == SDL_PACKEDORDER_ARGB) || \
              (SDL_PIXELORDER(format) == SDL_PACKEDORDER_RGBA) || \
              (SDL_PIXELORDER(format) == SDL_PACKEDORDER_ABGR) || \
              (SDL_PIXELORDER(format) == SDL_PACKEDORDER_BGRA))) || \
            (SDL_ISPIXELFORMAT_ARRAY(format) && \
             ((SDL_PIXELORDER(format) == SDL_ARRAYORDER_ARGB) || \
              (SDL_PIXELORDER(format) == SDL_ARRAYORDER_RGBA) || \
              (SDL_PIXELORDER(format) == SDL_ARRAYORDER_ABGR) || \
              (SDL_PIXELORDER(format) == SDL_ARRAYORDER_BGRA))))

DESCRIPTION

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

MACRO PARAMETERS

       format an SDL_PixelFormat to check.

RETURN VALUE

       Returns true if the format has alpha, false otherwise.

THREAD SAFETY

       It is safe to call this macro from any thread.

AVAILABILITY

       This macro is available since SDL 3.2.0.

Simple Directmedia Layer                           SDL 3.2.26                         SDL_ISPIXELFORMAT_ALPHA(3)