gainforge 0.5.1

HDR tonemapping library
Documentation 
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/*
 * // Copyright (c) Radzivon Bartoshyk 4/2026. All rights reserved.
 * //
 * // Redistribution and use in source and binary forms, with or without modification,
 * // are permitted provided that the following conditions are met:
 * //
 * // 1.  Redistributions of source code must retain the above copyright notice, this
 * // list of conditions and the following disclaimer.
 * //
 * // 2.  Redistributions in binary form must reproduce the above copyright notice,
 * // this list of conditions and the following disclaimer in the documentation
 * // and/or other materials provided with the distribution.
 * //
 * // 3.  Neither the name of the copyright holder nor the names of its
 * // contributors may be used to endorse or promote products derived from
 * // this software without specific prior written permission.
 * //
 * // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * // AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * // IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * // DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
 * // FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * // DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * // SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 * // CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * // OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#[allow(dead_code)]
#[inline]
pub(crate) fn split_by_twos<T: Copy>(data: &[T], channels: usize) -> (&[T], &[T]) {
    let len = data.len() / (channels * 4);
    let split_point = len * 4;
    data.split_at(split_point * channels)
}

#[allow(dead_code)]
#[inline]
pub(crate) fn split_by_twos_mut<T: Copy>(data: &mut [T], channels: usize) -> (&mut [T], &mut [T]) {
    let len = data.len() / (channels * 4);
    let split_point = len * 4;
    data.split_at_mut(split_point * channels)
}

#[allow(dead_code)]
pub(crate) trait MangledCoercion {
    fn _as_usize(self) -> usize;
}

#[allow(dead_code)]
impl MangledCoercion for u16 {
    #[inline(always)]
    fn _as_usize(self) -> usize {
        self as usize
    }
}

impl MangledCoercion for u8 {
    #[inline(always)]
    fn _as_usize(self) -> usize {
        self as usize
    }
}