moxcms 0.9.0

Simple Color Management in Rust
Documentation 
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/*
 * // Copyright (c) Radzivon Bartoshyk 3/2025. 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.
 */
#![cfg(feature = "avx_shaper_paths")]
use crate::conversions::TransformMatrixShaper;
use crate::conversions::avx::AvxAlignedU16;
use crate::conversions::simd::x86::{_mm_broadcast_ss, _mm_storeu_si128, _mm256_storeu_si256};
use crate::transform::PointeeSizeExpressible;
use crate::{CmsError, Layout, TransformExecutor};
use num_traits::AsPrimitive;
use std::arch::x86_64::*;

pub(crate) struct TransformShaperRgbAvx<
    T: Clone + Copy + 'static + PointeeSizeExpressible + Default,
    const SRC_LAYOUT: u8,
    const DST_LAYOUT: u8,
    // deleting linear cap is in effective here
    const LINEAR_CAP: usize,
> {
    pub(crate) profile: TransformMatrixShaper<T, LINEAR_CAP>,
    pub(crate) bit_depth: usize,
    pub(crate) gamma_lut: usize,
}

impl<
    T: Clone + Copy + 'static + PointeeSizeExpressible + Default,
    const SRC_LAYOUT: u8,
    const DST_LAYOUT: u8,
    const LINEAR_CAP: usize,
> TransformShaperRgbAvx<T, SRC_LAYOUT, DST_LAYOUT, LINEAR_CAP>
where
    u32: AsPrimitive<T>,
{
    #[target_feature(enable = "avx2,fma")]
    fn transform_impl<const FMA: bool>(&self, src: &[T], dst: &mut [T]) -> Result<(), CmsError> {
        let src_cn = Layout::from(SRC_LAYOUT);
        let dst_cn = Layout::from(DST_LAYOUT);
        let src_channels = src_cn.channels();
        let dst_channels = dst_cn.channels();

        let mut temporary0 = AvxAlignedU16([0; 16]);

        if src.len() / src_channels != dst.len() / dst_channels {
            return Err(CmsError::LaneSizeMismatch);
        }
        if !src.len().is_multiple_of(src_channels) {
            return Err(CmsError::LaneMultipleOfChannels);
        }
        if !dst.len().is_multiple_of(dst_channels) {
            return Err(CmsError::LaneMultipleOfChannels);
        }

        let t = self.profile.adaptation_matrix.transpose();

        let scale = (self.gamma_lut - 1) as f32;
        let max_colors: T = ((1 << self.bit_depth) - 1).as_();

        let m0 = _mm256_setr_ps(
            t.v[0][0], t.v[0][1], t.v[0][2], 0., t.v[0][0], t.v[0][1], t.v[0][2], 0.,
        );
        let m1 = _mm256_setr_ps(
            t.v[1][0], t.v[1][1], t.v[1][2], 0., t.v[1][0], t.v[1][1], t.v[1][2], 0.,
        );
        let m2 = _mm256_setr_ps(
            t.v[2][0], t.v[2][1], t.v[2][2], 0., t.v[2][0], t.v[2][1], t.v[2][2], 0.,
        );

        let zeros = _mm_setzero_ps();

        let v_scale = _mm256_set1_ps(scale);

        let mut src = src;
        let mut dst = dst;

        let src_iter = src.chunks_exact(src_channels * 2);
        let dst_iter = dst.chunks_exact_mut(dst_channels * 2);

        let (mut r0, mut g0, mut b0, mut a0);
        let (mut r1, mut g1, mut b1, mut a1);

        for (src, dst) in src_iter.zip(dst_iter) {
            r0 = _mm_broadcast_ss(&self.profile.r_linear[src[src_cn.r_i()]._as_usize()]);
            g0 = _mm_broadcast_ss(&self.profile.g_linear[src[src_cn.g_i()]._as_usize()]);
            b0 = _mm_broadcast_ss(&self.profile.b_linear[src[src_cn.b_i()]._as_usize()]);
            r1 = _mm_broadcast_ss(
                &self.profile.r_linear[src[src_cn.r_i() + src_channels]._as_usize()],
            );
            g1 = _mm_broadcast_ss(
                &self.profile.g_linear[src[src_cn.g_i() + src_channels]._as_usize()],
            );
            b1 = _mm_broadcast_ss(
                &self.profile.b_linear[src[src_cn.b_i() + src_channels]._as_usize()],
            );
            a0 = if src_channels == 4 {
                src[src_cn.a_i()]
            } else {
                max_colors
            };
            a1 = if src_channels == 4 {
                src[src_cn.a_i() + src_channels]
            } else {
                max_colors
            };

            let r = _mm256_insertf128_ps::<1>(_mm256_castps128_ps256(r0), r1);
            let g = _mm256_insertf128_ps::<1>(_mm256_castps128_ps256(g0), g1);
            let b = _mm256_insertf128_ps::<1>(_mm256_castps128_ps256(b0), b1);

            let mut v = if FMA {
                let v0 = _mm256_mul_ps(r, m0);
                let v1 = _mm256_fmadd_ps(g, m1, v0);
                _mm256_fmadd_ps(b, m2, v1)
            } else {
                let v0 = _mm256_mul_ps(r, m0);
                let v1 = _mm256_mul_ps(g, m1);
                let v2 = _mm256_mul_ps(b, m2);

                _mm256_add_ps(_mm256_add_ps(v0, v1), v2)
            };

            v = _mm256_max_ps(v, _mm256_setzero_ps());
            v = _mm256_mul_ps(v, v_scale);
            v = _mm256_min_ps(v, v_scale);

            let zx = _mm256_cvtps_epi32(v);
            _mm256_storeu_si256(&mut temporary0.0, zx);

            dst[dst_cn.r_i()] = self.profile.r_gamma[temporary0.0[0] as usize];
            dst[dst_cn.g_i()] = self.profile.g_gamma[temporary0.0[2] as usize];
            dst[dst_cn.b_i()] = self.profile.b_gamma[temporary0.0[4] as usize];
            if dst_channels == 4 {
                dst[dst_cn.a_i()] = a0;
            }

            dst[dst_cn.r_i() + dst_channels] = self.profile.r_gamma[temporary0.0[8] as usize];
            dst[dst_cn.g_i() + dst_channels] = self.profile.g_gamma[temporary0.0[10] as usize];
            dst[dst_cn.b_i() + dst_channels] = self.profile.b_gamma[temporary0.0[12] as usize];
            if dst_channels == 4 {
                dst[dst_cn.a_i() + dst_channels] = a1;
            }
        }

        src = src.chunks_exact(src_channels * 2).remainder();
        dst = dst.chunks_exact_mut(dst_channels * 2).into_remainder();

        for (src, dst) in src
            .chunks_exact(src_channels)
            .zip(dst.chunks_exact_mut(dst_channels))
        {
            let r = _mm_broadcast_ss(&self.profile.r_linear[src[src_cn.r_i()]._as_usize()]);
            let g = _mm_broadcast_ss(&self.profile.g_linear[src[src_cn.g_i()]._as_usize()]);
            let b = _mm_broadcast_ss(&self.profile.b_linear[src[src_cn.b_i()]._as_usize()]);
            let a = if src_channels == 4 {
                src[src_cn.a_i()]
            } else {
                max_colors
            };

            let mut v = if FMA {
                let v0 = _mm_mul_ps(r, _mm256_castps256_ps128(m0));
                let v1 = _mm_fmadd_ps(g, _mm256_castps256_ps128(m1), v0);
                _mm_fmadd_ps(b, _mm256_castps256_ps128(m2), v1)
            } else {
                let v0 = _mm_mul_ps(r, _mm256_castps256_ps128(m0));
                let v1 = _mm_mul_ps(g, _mm256_castps256_ps128(m1));
                let v2 = _mm_mul_ps(b, _mm256_castps256_ps128(m2));

                _mm_add_ps(_mm_add_ps(v0, v1), v2)
            };

            v = _mm_max_ps(v, zeros);
            v = _mm_mul_ps(v, _mm256_castps256_ps128(v_scale));
            v = _mm_min_ps(v, _mm256_castps256_ps128(v_scale));

            let zx = _mm_cvtps_epi32(v);
            _mm_storeu_si128(temporary0.0.first_chunk_mut::<8>().unwrap(), zx);

            dst[dst_cn.r_i()] = self.profile.r_gamma[temporary0.0[0] as usize];
            dst[dst_cn.g_i()] = self.profile.g_gamma[temporary0.0[2] as usize];
            dst[dst_cn.b_i()] = self.profile.b_gamma[temporary0.0[4] as usize];
            if dst_channels == 4 {
                dst[dst_cn.a_i()] = a;
            }
        }

        Ok(())
    }
}

impl<
    T: Clone + Copy + 'static + PointeeSizeExpressible + Default,
    const SRC_LAYOUT: u8,
    const DST_LAYOUT: u8,
    const LINEAR_CAP: usize,
> TransformExecutor<T> for TransformShaperRgbAvx<T, SRC_LAYOUT, DST_LAYOUT, LINEAR_CAP>
where
    u32: AsPrimitive<T>,
{
    fn transform(&self, src: &[T], dst: &mut [T]) -> Result<(), CmsError> {
        unsafe {
            assert!(std::arch::is_x86_feature_detected!("fma"));
            self.transform_impl::<true>(src, dst)
        }
    }
}