moxcms/conversions/
lut3x4.rs

1/*
2 * // Copyright (c) Radzivon Bartoshyk 3/2025. 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 */
29use crate::profile::LutDataType;
30use crate::safe_math::{SafeMul, SafePowi};
31use crate::trc::lut_interp_linear_float;
32use crate::{
33    CmsError, Cube, DataColorSpace, InterpolationMethod, MalformedSize, Stage, TransformOptions,
34    Vector4f,
35};
36use num_traits::AsPrimitive;
37
38#[derive(Default)]
39struct Lut3x4 {
40    input: [Vec<f32>; 3],
41    clut: Vec<f32>,
42    grid_size: u8,
43    gamma: [Vec<f32>; 4],
44    interpolation_method: InterpolationMethod,
45    pcs: DataColorSpace,
46}
47
48fn make_lut_3x4(
49    lut: &LutDataType,
50    options: TransformOptions,
51    pcs: DataColorSpace,
52) -> Result<Lut3x4, CmsError> {
53    let clut_length: usize = (lut.num_clut_grid_points as usize)
54        .safe_powi(lut.num_input_channels as u32)?
55        .safe_mul(lut.num_output_channels as usize)?;
56
57    let clut_table = lut.clut_table.to_clut_f32();
58    if clut_table.len() != clut_length {
59        return Err(CmsError::MalformedClut(MalformedSize {
60            size: clut_table.len(),
61            expected: clut_length,
62        }));
63    }
64
65    let linearization_table = lut.input_table.to_clut_f32();
66
67    if linearization_table.len() < lut.num_input_table_entries as usize * 3 {
68        return Err(CmsError::MalformedCurveLutTable(MalformedSize {
69            size: linearization_table.len(),
70            expected: lut.num_input_table_entries as usize * 3,
71        }));
72    }
73
74    let linear_curve0 = linearization_table[..lut.num_input_table_entries as usize].to_vec();
75    let linear_curve1 = linearization_table
76        [lut.num_input_table_entries as usize..lut.num_input_table_entries as usize * 2]
77        .to_vec();
78    let linear_curve2 = linearization_table
79        [lut.num_input_table_entries as usize * 2..lut.num_input_table_entries as usize * 3]
80        .to_vec();
81
82    let gamma_table = lut.output_table.to_clut_f32();
83
84    if gamma_table.len() < lut.num_output_table_entries as usize * 4 {
85        return Err(CmsError::MalformedCurveLutTable(MalformedSize {
86            size: gamma_table.len(),
87            expected: lut.num_output_table_entries as usize * 4,
88        }));
89    }
90
91    let gamma_curve0 = gamma_table[..lut.num_output_table_entries as usize].to_vec();
92    let gamma_curve1 = gamma_table
93        [lut.num_output_table_entries as usize..lut.num_output_table_entries as usize * 2]
94        .to_vec();
95    let gamma_curve2 = gamma_table
96        [lut.num_output_table_entries as usize * 2..lut.num_output_table_entries as usize * 3]
97        .to_vec();
98    let gamma_curve3 = gamma_table
99        [lut.num_output_table_entries as usize * 3..lut.num_output_table_entries as usize * 4]
100        .to_vec();
101
102    let transform = Lut3x4 {
103        input: [linear_curve0, linear_curve1, linear_curve2],
104        interpolation_method: options.interpolation_method,
105        clut: clut_table,
106        grid_size: lut.num_clut_grid_points,
107        pcs,
108        gamma: [gamma_curve0, gamma_curve1, gamma_curve2, gamma_curve3],
109    };
110    Ok(transform)
111}
112
113fn stage_lut_3x4(
114    lut: &LutDataType,
115    options: TransformOptions,
116    pcs: DataColorSpace,
117) -> Result<Box<dyn Stage>, CmsError> {
118    let lut = make_lut_3x4(lut, options, pcs)?;
119
120    let transform = Lut3x4 {
121        input: lut.input,
122        interpolation_method: lut.interpolation_method,
123        clut: lut.clut,
124        grid_size: lut.grid_size,
125        pcs: lut.pcs,
126        gamma: lut.gamma,
127    };
128    Ok(Box::new(transform))
129}
130
131impl Lut3x4 {
132    fn transform_impl<Fetch: Fn(f32, f32, f32) -> Vector4f>(
133        &self,
134        src: &[f32],
135        dst: &mut [f32],
136        fetch: Fetch,
137    ) -> Result<(), CmsError> {
138        let linearization_0 = &self.input[0];
139        let linearization_1 = &self.input[1];
140        let linearization_2 = &self.input[2];
141        for (dest, src) in dst.chunks_exact_mut(4).zip(src.chunks_exact(3)) {
142            debug_assert!(self.grid_size as i32 >= 1);
143            let linear_x = lut_interp_linear_float(src[0], linearization_0);
144            let linear_y = lut_interp_linear_float(src[1], linearization_1);
145            let linear_z = lut_interp_linear_float(src[2], linearization_2);
146
147            let clut = fetch(linear_x, linear_y, linear_z);
148
149            let pcs_x = lut_interp_linear_float(clut.v[0], &self.gamma[0]);
150            let pcs_y = lut_interp_linear_float(clut.v[1], &self.gamma[1]);
151            let pcs_z = lut_interp_linear_float(clut.v[2], &self.gamma[2]);
152            let pcs_w = lut_interp_linear_float(clut.v[3], &self.gamma[3]);
153            dest[0] = pcs_x;
154            dest[1] = pcs_y;
155            dest[2] = pcs_z;
156            dest[3] = pcs_w;
157        }
158        Ok(())
159    }
160}
161
162impl Stage for Lut3x4 {
163    fn transform(&self, src: &[f32], dst: &mut [f32]) -> Result<(), CmsError> {
164        let l_tbl = Cube::new(&self.clut, self.grid_size as usize);
165
166        // If PCS is LAB then linear interpolation should be used
167        if self.pcs == DataColorSpace::Lab || self.pcs == DataColorSpace::Xyz {
168            return self.transform_impl(src, dst, |x, y, z| l_tbl.trilinear_vec4(x, y, z));
169        }
170
171        match self.interpolation_method {
172            #[cfg(feature = "options")]
173            InterpolationMethod::Tetrahedral => {
174                self.transform_impl(src, dst, |x, y, z| l_tbl.tetra_vec4(x, y, z))?;
175            }
176            #[cfg(feature = "options")]
177            InterpolationMethod::Pyramid => {
178                self.transform_impl(src, dst, |x, y, z| l_tbl.pyramid_vec4(x, y, z))?;
179            }
180            #[cfg(feature = "options")]
181            InterpolationMethod::Prism => {
182                self.transform_impl(src, dst, |x, y, z| l_tbl.prism_vec4(x, y, z))?;
183            }
184            InterpolationMethod::Linear => {
185                self.transform_impl(src, dst, |x, y, z| l_tbl.trilinear_vec4(x, y, z))?;
186            }
187        }
188        Ok(())
189    }
190}
191
192pub(crate) fn create_lut3_samples<T: Copy + 'static, const SAMPLES: usize>() -> Vec<T>
193where
194    u32: AsPrimitive<T>,
195{
196    let lut_size: u32 = (3 * SAMPLES * SAMPLES * SAMPLES) as u32;
197
198    assert!(SAMPLES >= 1);
199
200    let mut src = Vec::with_capacity(lut_size as usize);
201    for x in 0..SAMPLES as u32 {
202        for y in 0..SAMPLES as u32 {
203            for z in 0..SAMPLES as u32 {
204                src.push(x.as_());
205                src.push(y.as_());
206                src.push(z.as_());
207            }
208        }
209    }
210    src
211}
212
213pub(crate) fn create_lut3_samples_norm<const SAMPLES: usize>() -> Vec<f32> {
214    let lut_size: u32 = (3 * SAMPLES * SAMPLES * SAMPLES) as u32;
215
216    assert!(SAMPLES >= 1);
217
218    let scale = 1. / (SAMPLES as f32 - 1.0);
219
220    let mut src = Vec::with_capacity(lut_size as usize);
221    for x in 0..SAMPLES as u32 {
222        for y in 0..SAMPLES as u32 {
223            for z in 0..SAMPLES as u32 {
224                src.push(x as f32 * scale);
225                src.push(y as f32 * scale);
226                src.push(z as f32 * scale);
227            }
228        }
229    }
230    src
231}
232
233pub(crate) fn create_lut3x4(
234    lut: &LutDataType,
235    src: &[f32],
236    options: TransformOptions,
237    pcs: DataColorSpace,
238) -> Result<Vec<f32>, CmsError> {
239    if lut.num_input_channels != 3 || lut.num_output_channels != 4 {
240        return Err(CmsError::UnsupportedProfileConnection);
241    }
242
243    let mut dest = vec![0.; (src.len() / 3) * 4];
244
245    let lut_stage = stage_lut_3x4(lut, options, pcs)?;
246    lut_stage.transform(src, &mut dest)?;
247    Ok(dest)
248}
moxcms/conversions/lut3x4.rs

moxcms/conversions/
lut3x4.rs
