Function SDL_SetRenderDrawColorFloat 

pub unsafe extern "C" fn SDL_SetRenderDrawColorFloat(
    renderer: *mut SDL_Renderer,
    r: c_float,
    g: c_float,
    b: c_float,
    a: c_float,
) -> bool

Set the color used for drawing operations (Rect, Line and Clear).

Set the color for drawing or filling rectangles, lines, and points, and for SDL_RenderClear().

Parameters

• renderer: the rendering context.
• r: the red value used to draw on the rendering target.
• g: the green value used to draw on the rendering target.
• b: the blue value used to draw on the rendering target.
• a: the alpha value used to draw on the rendering target. Use SDL_SetRenderDrawBlendMode to specify how the alpha channel is used.

Return value

Returns true on success or false on failure; call SDL_GetError() for more information.

Thread safety

This function should only be called on the main thread.

Availability

This function is available since SDL 3.2.0.

See also

• SDL_GetRenderDrawColorFloat
• SDL_SetRenderDrawColor