Function SDL_ReadSurfacePixelFloat 

pub unsafe extern "C" fn SDL_ReadSurfacePixelFloat(
    surface: *mut SDL_Surface,
    x: c_int,
    y: c_int,
    r: *mut c_float,
    g: *mut c_float,
    b: *mut c_float,
    a: *mut c_float,
) -> bool

Retrieves a single pixel from a surface.

This function prioritizes correctness over speed: it is suitable for unit tests, but is not intended for use in a game engine.

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 can be called on different threads with different surfaces.

Availability

This function is available since SDL 3.2.0.