Provided by: libsdl3-doc_3.2.8+ds-1_all 

NAME
SDL_ReadSurfacePixelFloat - Retrieves a single pixel from a surface.
HEADER FILE
Defined in SDL3/SDL_surface.h
SYNOPSIS
#include "SDL3/SDL.h" bool SDL_ReadSurfacePixelFloat(SDL_Surface *surface, int x, int y, float *r, float *g, float *b, float *a);
DESCRIPTION
This function prioritizes correctness over speed: it is suitable for unit tests, but is not intended for use in a game engine.
FUNCTION PARAMETERS
surface the surface to read. x the horizontal coordinate, 0 <= x < width. y the vertical coordinate, 0 <= y < height. r a pointer filled in with the red channel, normally in the range 0-1, or NULL to ignore this channel. g a pointer filled in with the green channel, normally in the range 0-1, or NULL to ignore this channel. b a pointer filled in with the blue channel, normally in the range 0-1, or NULL to ignore this channel. a a pointer filled in with the alpha channel, normally in the range 0-1, or NULL to ignore this channel.
RETURN VALUE
Returns true on success or false on failure; call SDL_GetError () for more information.
AVAILABILITY
This function is available since SDL 3.2.0. Simple Directmedia Layer SDL 3.2.8 SDL_ReadSurfacePixelFloat(3)