devela::_dep::sdl3::sys::hints

Constant SDL_HINT_VIDEO_DOUBLE_BUFFER

pub const SDL_HINT_VIDEO_DOUBLE_BUFFER: *const i8 = _; // {alloc39967<imm>: *const i8}
Available on crate feature dep_sdl3 only.
Expand description

Tell the video driver that we only want a double buffer.

By default, most lowlevel 2D APIs will use a triple buffer scheme that wastes no CPU time on waiting for vsync after issuing a flip, but introduces a frame of latency. On the other hand, using a double buffer scheme instead is recommended for cases where low latency is an important factor because we save a whole frame of latency.

We do so by waiting for vsync immediately after issuing a flip, usually just after eglSwapBuffers call in the backend’s *_SwapWindow function.

This hint is currently supported on the following drivers:

  • Raspberry Pi (raspberrypi)
  • Wayland (wayland)

This hint should be set before SDL is initialized.

§Availability

This hint is available since SDL 3.2.0.