matrix_gui/
fill_rect.rs

1#![allow(clippy::missing_safety_doc)]
2
3use embedded_graphics::{prelude::PixelColor, primitives::Rectangle};
4
5pub fn fill_with_color<COL: PixelColor>(rect: &Rectangle, color: COL) {
6    unsafe extern "Rust" {
7        fn _ll_fill_with_color(x: u32, y: u32, w: u32, h: u32, color: u32);
8    }
9
10    let color_as_u32 = color_to_u32(&color);
11
12    let top_left = rect.top_left;
13    let size = rect.size;
14    unsafe {
15        _ll_fill_with_color(
16            top_left.x as u32,
17            top_left.y as u32,
18            size.width,
19            size.height,
20            color_as_u32,
21        )
22    };
23}
24pub fn fill_with_buffer(rect: &Rectangle, colors: *const u8) {
25    unsafe extern "Rust" {
26        fn _ll_fill_with_buffer(x: u32, y: u32, w: u32, h: u32, colors: *const u8);
27    }
28
29    let top_left = rect.top_left;
30    let size = rect.size;
31    unsafe {
32        _ll_fill_with_buffer(
33            top_left.x as u32,
34            top_left.y as u32,
35            size.width,
36            size.height,
37            colors,
38        )
39    };
40}
41
42fn color_to_u32<COL: PixelColor>(color: &COL) -> u32 {
43    let color_ptr = color as *const COL as *const u8;
44    let color_size = core::mem::size_of::<COL>();
45
46    match color_size {
47        1 => unsafe { *color_ptr as u32 },
48        2 => unsafe { *color_ptr.cast::<u16>() as u32 },
49        3 => {
50            let bytes = unsafe { core::ptr::read_unaligned(color_ptr.cast::<[u8; 3]>()) };
51            u32::from_be_bytes([0, bytes[0], bytes[1], bytes[2]])
52        }
53        4 => unsafe { *color_ptr.cast::<u32>() },
54        _ => 0xFFFFFFFF,
55    }
56}
57
58pub unsafe trait ImplFillRect {
59    unsafe fn fill_with_color(x: u32, y: u32, w: u32, h: u32, color: u32);
60    unsafe fn fill_with_buffer(x: u32, y: u32, w: u32, h: u32, colors: *const u8);
61}
62
63#[macro_export]
64macro_rules! set_impl_fill_rect {
65    ($t: ty) => {
66        #[unsafe(no_mangle)]
67        unsafe fn _ll_fill_with_color(x: u32, y: u32, w: u32, h: u32, color: u32) {
68            unsafe { <$t as $crate::fill_rect::ImplFillRect>::fill_with_color(x, y, w, h, color) }
69        }
70        #[unsafe(no_mangle)]
71        unsafe fn _ll_fill_with_buffer(x: u32, y: u32, w: u32, h: u32, colors: *const u8) {
72            unsafe { <$t as $crate::fill_rect::ImplFillRect>::fill_with_buffer(x, y, w, h, colors) }
73        }
74    };
75}
matrix_gui/fill_rect.rs

matrix_gui/
fill_rect.rs
