NAME¶

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

HEADER FILE¶

Defined in SDL3/SDL_pixels.h

SYNOPSIS¶

#include "SDL3/SDL.h"

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

DESCRIPTION¶

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

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.