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.

THREAD SAFETY

This function is not thread safe.

AVAILABILITY

This function is available since SDL 3.2.0.