| // Copyright 2020 The Fuchsia Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| pub fn clear_buffer(buffer: &mut [u8], clear_color: [u8; 4]) { |
| for color in buffer.chunks_exact_mut(4) { |
| color.copy_from_slice(&clear_color); |
| } |
| } |
| |
| #[cfg(test)] |
| mod tests { |
| use super::*; |
| |
| const RED: [u8; 4] = [0xFF, 0x00, 0x00, 0xFF]; |
| const GREEN: [u8; 4] = [0x00, 0xFF, 0x00, 0xFF]; |
| |
| #[test] |
| fn clear_to_red() { |
| let mut buffer = [GREEN; 3].concat(); |
| clear_buffer(&mut buffer, RED); |
| assert_eq!(buffer, [RED, RED, RED].concat()); |
| } |
| } |
