/rust/registry/src/index.crates.io-1949cf8c6b5b557f/pic-scale-safe-0.1.5/src/saturate_narrow.rs
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1 | | /* |
2 | | * Copyright (c) Radzivon Bartoshyk, 10/2024. All rights reserved. |
3 | | * |
4 | | * Redistribution and use in source and binary forms, with or without modification, |
5 | | * are permitted provided that the following conditions are met: |
6 | | * |
7 | | * 1. Redistributions of source code must retain the above copyright notice, this |
8 | | * list of conditions and the following disclaimer. |
9 | | * |
10 | | * 2. Redistributions in binary form must reproduce the above copyright notice, |
11 | | * this list of conditions and the following disclaimer in the documentation |
12 | | * and/or other materials provided with the distribution. |
13 | | * |
14 | | * 3. Neither the name of the copyright holder nor the names of its |
15 | | * contributors may be used to endorse or promote products derived from |
16 | | * this software without specific prior written permission. |
17 | | * |
18 | | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
19 | | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
20 | | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
21 | | * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE |
22 | | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
23 | | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR |
24 | | * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER |
25 | | * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
26 | | * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
27 | | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
28 | | */ |
29 | | use crate::definitions::PRECISION; |
30 | | |
31 | | pub(crate) trait SaturateNarrow<J> { |
32 | | fn saturate_narrow(self, bit_depth: u32) -> J; |
33 | | } |
34 | | |
35 | | impl SaturateNarrow<u8> for i32 { |
36 | | #[inline(always)] |
37 | | #[allow(clippy::manual_clamp)] |
38 | 0 | fn saturate_narrow(self, _: u32) -> u8 { |
39 | 0 | (self >> PRECISION).max(0).min(255) as u8 |
40 | 0 | } |
41 | | } |
42 | | |
43 | | impl SaturateNarrow<u8> for i64 { |
44 | | #[inline(always)] |
45 | | #[allow(clippy::manual_clamp)] |
46 | 0 | fn saturate_narrow(self, _: u32) -> u8 { |
47 | 0 | (self >> PRECISION).max(0).min(255) as u8 |
48 | 0 | } |
49 | | } |
50 | | |
51 | | impl SaturateNarrow<u16> for i32 { |
52 | | #[inline(always)] |
53 | | #[allow(clippy::manual_clamp)] |
54 | 0 | fn saturate_narrow(self, bit_depth: u32) -> u16 { |
55 | 0 | (self >> PRECISION).max(0).min((1 << bit_depth) - 1) as u16 |
56 | 0 | } |
57 | | } |
58 | | |
59 | | impl SaturateNarrow<u16> for i64 { |
60 | | #[inline(always)] |
61 | | #[allow(clippy::manual_clamp)] |
62 | 0 | fn saturate_narrow(self, bit_depth: u32) -> u16 { |
63 | 0 | (self >> PRECISION).max(0).min((1 << bit_depth) - 1) as u16 |
64 | 0 | } |
65 | | } |