Function SDL_WriteSurfacePixel 

pub unsafe extern "C" fn SDL_WriteSurfacePixel(
    surface: *mut SDL_Surface,
    x: c_int,
    y: c_int,
    r: Uint8,
    g: Uint8,
    b: Uint8,
    a: Uint8,
) -> bool

Writes a single pixel to a surface.

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

Like SDL_MapRGBA, this uses the entire 0..255 range when converting color components from pixel formats with less than 8 bits per RGB component.

Parameters

• surface: the surface to write.
• x: the horizontal coordinate, 0 <= x < width.
• y: the vertical coordinate, 0 <= y < height.
• r: the red channel value, 0-255.
• g: the green channel value, 0-255.
• b: the blue channel value, 0-255.
• a: the alpha channel value, 0-255.

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.