moxcms/
lut_hint.rs

1/*
2 * // Copyright (c) Radzivon Bartoshyk 6/2025. 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::LutWarehouse;
30
31impl LutWarehouse {
32    /// Method tests if mathematical fusion on LUT table is allowed.
33    /// If it's not, full brute-force pass in [Katana] is required.
34    pub(crate) fn is_katana_required(&self) -> bool {
35        match self {
36            LutWarehouse::Lut(lut) => {
37                let input_entries = lut.num_input_channels as usize;
38                let output_entries = lut.num_output_channels as usize;
39                for i in 0..input_entries {
40                    if lut.input_table.is_degenerated(input_entries, i) {
41                        return true;
42                    }
43                    if !lut.input_table.is_monotonic(input_entries, i) {
44                        return true;
45                    }
46                    if lut.input_table.have_discontinuities(input_entries, i) {
47                        return true;
48                    }
49                }
50
51                for i in 0..output_entries {
52                    if lut.output_table.is_degenerated(output_entries, i) {
53                        return true;
54                    }
55                    if !lut.output_table.is_monotonic(output_entries, i) {
56                        return true;
57                    }
58                    if lut.output_table.have_discontinuities(output_entries, i) {
59                        return true;
60                    }
61                }
62
63                false
64            }
65            LutWarehouse::Multidimensional(mab) => {
66                for curve in mab.a_curves.iter() {
67                    if curve.is_degenerated() {
68                        return true;
69                    }
70                    if !curve.is_monotonic() {
71                        return true;
72                    }
73                    if curve.have_discontinuities() {
74                        return true;
75                    }
76                }
77
78                for curve in mab.m_curves.iter() {
79                    if curve.is_degenerated() {
80                        return true;
81                    }
82                    if !curve.is_monotonic() {
83                        return true;
84                    }
85                    if curve.have_discontinuities() {
86                        return true;
87                    }
88                }
89
90                for curve in mab.b_curves.iter() {
91                    if curve.is_degenerated() {
92                        return true;
93                    }
94                    if !curve.is_monotonic() {
95                        return true;
96                    }
97                    if curve.have_discontinuities() {
98                        return true;
99                    }
100                }
101
102                false
103            }
104        }
105    }
106}
moxcms/lut_hint.rs

moxcms/
lut_hint.rs
