Creates a new buffered LCD backed by `lcd`.
(lcd: L, font: &'static Font)
| 57 | { |
| 58 | /// Creates a new buffered LCD backed by `lcd`. |
| 59 | pub fn new(lcd: L, font: &'static Font) -> Self { |
| 60 | let (size, stride) = lcd.info(); |
| 61 | |
| 62 | let fb = { |
| 63 | let pixels = size.width * size.height; |
| 64 | vec![0; pixels * stride] |
| 65 | }; |
| 66 | |
| 67 | let size_chars = font.chars_in_area(size.into()); |
| 68 | |
| 69 | // Precompute the table of encoded ANSI colors. This is necessary for O(1) decoding |
| 70 | // of rendered pixels. |
| 71 | let ansi_colors = { |
| 72 | let mut ansi_colors = HashMap::new(); |
| 73 | for color in u8::MIN..=u8::MAX { |
| 74 | let pixel = lcd.encode(ansi_color_to_rgb(color)); |
| 75 | ansi_colors.entry(pixel.as_slice().to_vec()).or_insert(color); |
| 76 | } |
| 77 | ansi_colors |
| 78 | }; |
| 79 | |
| 80 | let draw_color = lcd.encode((255, 255, 255)); |
| 81 | let row_buffer = Vec::with_capacity(size.width * stride); |
| 82 | |
| 83 | Self { |
| 84 | lcd, |
| 85 | font, |
| 86 | fb, |
| 87 | stride, |
| 88 | sync: true, |
| 89 | damage: None, |
| 90 | size_pixels: size, |
| 91 | size_chars, |
| 92 | ansi_colors, |
| 93 | draw_color, |
| 94 | row_buffer, |
| 95 | } |
| 96 | } |
| 97 | |
| 98 | /// Executes mutations on the buffered LCD via `ops` while ensuring that syncing is disabled. |
| 99 | fn without_sync<O>(&mut self, ops: O) -> io::Result<()> |
nothing calls this directly
no test coverage detected