SDL_PremultiplyAlpha - Premultiply the alpha on a block of pixels.

       This function is available since SDL 3.2.0.

Simple Directmedia Layer                           SDL 3.2.20                            SDL_PremultiplyAlpha(3)

       This is safe to use with src == dst, but not for other overlapping areas.

width  the width of the block to convert, in pixels.

       height the height of the block to convert, in pixels.

       src_format
              an SDL_PixelFormat value of the src pixels format.

       src    a pointer to the source pixels.

       src_pitch
              the pitch of the source pixels, in bytes.

       dst_format
              an SDL_PixelFormat value of the dst pixels format.

       dst    a pointer to be filled in with premultiplied pixel data.

       dst_pitch
              the pitch of the destination pixels, in bytes.

       linear true to convert from sRGB to linear space for the alpha multiplication, false to do multiplication
              in sRGB space.

       SDL_PremultiplyAlpha - Premultiply the alpha on a block of pixels.

       for more information.

#include<SDL3/SDL_surface.h>boolSDL_PremultiplyAlpha(intwidth,intheight,SDL_PixelFormatsrc_format,constvoid*src,intsrc_pitch,SDL_PixelFormatdst_format,void*dst,intdst_pitch,boollinear);

       The  same  destination  pixels  should  not  be used from two threads at once. It is safe to use the same
       source pixels from multiple threads.