pic_scale/colors/
oklab_scaler.rs

1/*
2 * Copyright (c) Radzivon Bartoshyk. 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 colorutils_rs::{TransferFunction, oklab_to_rgb, oklab_to_rgba, rgb_to_oklab, rgba_to_oklab};
30
31use crate::pic_scale_error::PicScaleError;
32use crate::scaler::ScalingF32;
33use crate::support::check_image_size_overflow;
34use crate::{ImageStore, ImageStoreMut, ResamplingFunction, Scaler, Scaling, ThreadingPolicy};
35
36#[derive(Debug, Copy, Clone)]
37/// Converts image to *Oklab* components scales it and convert back
38pub struct OklabScaler {
39    pub(crate) scaler: Scaler,
40    pub(crate) transfer_function: TransferFunction,
41}
42
43impl OklabScaler {
44    /// # Arguments
45    /// - `transfer_function` - Transfer function to move into linear colorspace and back
46    pub fn new(filter: ResamplingFunction, transfer_function: TransferFunction) -> Self {
47        OklabScaler {
48            scaler: Scaler::new(filter),
49            transfer_function,
50        }
51    }
52}
53
54impl Scaling for OklabScaler {
55    fn set_threading_policy(&mut self, threading_policy: ThreadingPolicy) {
56        self.scaler.threading_policy = threading_policy;
57    }
58
59    fn resize_plane<'a>(
60        &'a self,
61        _: &ImageStore<'a, u8, 1>,
62        _: &mut ImageStoreMut<'a, u8, 1>,
63    ) -> Result<(), PicScaleError> {
64        unimplemented!()
65    }
66
67    fn resize_cbcr8<'a>(
68        &'a self,
69        _: &ImageStore<'a, u8, 2>,
70        _: &mut ImageStoreMut<'a, u8, 2>,
71    ) -> Result<(), PicScaleError> {
72        unimplemented!()
73    }
74
75    fn resize_gray_alpha<'a>(
76        &'a self,
77        _: &ImageStore<'a, u8, 2>,
78        _: &mut ImageStoreMut<'a, u8, 2>,
79        _: bool,
80    ) -> Result<(), PicScaleError> {
81        unimplemented!()
82    }
83
84    fn resize_rgb<'a>(
85        &self,
86        store: &ImageStore<'a, u8, 3>,
87        into: &mut ImageStoreMut<'a, u8, 3>,
88    ) -> Result<(), PicScaleError> {
89        let new_size = into.get_size();
90        into.validate()?;
91        store.validate()?;
92        if store.width == 0 || store.height == 0 || new_size.width == 0 || new_size.height == 0 {
93            return Err(PicScaleError::ZeroImageDimensions);
94        }
95
96        if check_image_size_overflow(store.width, store.height, store.channels) {
97            return Err(PicScaleError::SourceImageIsTooLarge);
98        }
99
100        if check_image_size_overflow(new_size.width, new_size.height, store.channels) {
101            return Err(PicScaleError::DestinationImageIsTooLarge);
102        }
103
104        if store.width == new_size.width && store.height == new_size.height {
105            store.copied_to_mut(into);
106            return Ok(());
107        }
108
109        const CN: usize = 3;
110
111        let mut target_vertical = vec![f32::default(); store.width * store.height * CN];
112
113        let mut lab_store =
114            ImageStoreMut::<f32, CN>::from_slice(&mut target_vertical, store.width, store.height)?;
115        lab_store.bit_depth = into.bit_depth;
116
117        let lab_stride = lab_store.width as u32 * CN as u32 * size_of::<f32>() as u32;
118        rgb_to_oklab(
119            store.buffer.as_ref(),
120            store.width as u32 * CN as u32,
121            lab_store.buffer.borrow_mut(),
122            lab_stride,
123            lab_store.width as u32,
124            lab_store.height as u32,
125            self.transfer_function,
126        );
127
128        let new_immutable_store = ImageStore::<f32, CN> {
129            buffer: std::borrow::Cow::Owned(target_vertical),
130            channels: CN,
131            width: store.width,
132            height: store.height,
133            stride: store.width * CN,
134            bit_depth: into.bit_depth,
135        };
136
137        let mut new_store = ImageStoreMut::<f32, CN>::alloc(into.width, into.height);
138        self.scaler
139            .resize_rgb_f32(&new_immutable_store, &mut new_store)?;
140
141        let new_lab_stride = new_store.width as u32 * CN as u32 * size_of::<f32>() as u32;
142
143        oklab_to_rgb(
144            new_store.buffer.borrow(),
145            new_lab_stride,
146            into.buffer.borrow_mut(),
147            into.width as u32 * CN as u32,
148            new_store.width as u32,
149            new_store.height as u32,
150            self.transfer_function,
151        );
152        Ok(())
153    }
154
155    fn resize_rgba<'a>(
156        &'a self,
157        store: &ImageStore<'a, u8, 4>,
158        into: &mut ImageStoreMut<'a, u8, 4>,
159        premultiply_alpha: bool,
160    ) -> Result<(), PicScaleError> {
161        let new_size = into.get_size();
162        into.validate()?;
163        store.validate()?;
164        if store.width == 0 || store.height == 0 || new_size.width == 0 || new_size.height == 0 {
165            return Err(PicScaleError::ZeroImageDimensions);
166        }
167
168        if check_image_size_overflow(store.width, store.height, store.channels) {
169            return Err(PicScaleError::SourceImageIsTooLarge);
170        }
171
172        if check_image_size_overflow(new_size.width, new_size.height, store.channels) {
173            return Err(PicScaleError::DestinationImageIsTooLarge);
174        }
175
176        if store.width == new_size.width && store.height == new_size.height {
177            store.copied_to_mut(into);
178            return Ok(());
179        }
180
181        const CN: usize = 4;
182
183        let mut target_vertical = vec![f32::default(); store.width * store.height * CN];
184
185        let mut lab_store =
186            ImageStoreMut::<f32, CN>::from_slice(&mut target_vertical, store.width, store.height)?;
187        lab_store.bit_depth = into.bit_depth;
188
189        let lab_stride = lab_store.width as u32 * CN as u32 * size_of::<f32>() as u32;
190        rgba_to_oklab(
191            store.buffer.as_ref(),
192            store.width as u32 * CN as u32,
193            lab_store.buffer.borrow_mut(),
194            lab_stride,
195            lab_store.width as u32,
196            lab_store.height as u32,
197            self.transfer_function,
198        );
199
200        let new_immutable_store = ImageStore::<f32, CN> {
201            buffer: std::borrow::Cow::Owned(target_vertical),
202            channels: CN,
203            width: store.width,
204            height: store.height,
205            stride: store.width * CN,
206            bit_depth: into.bit_depth,
207        };
208
209        let mut new_store = ImageStoreMut::<f32, CN>::alloc(into.width, into.height);
210        self.scaler
211            .resize_rgba_f32(&new_immutable_store, &mut new_store, premultiply_alpha)?;
212
213        let new_lab_stride = new_store.width as u32 * CN as u32 * size_of::<f32>() as u32;
214
215        oklab_to_rgba(
216            new_store.buffer.borrow(),
217            new_lab_stride,
218            into.buffer.borrow_mut(),
219            into.width as u32 * CN as u32,
220            new_store.width as u32,
221            new_store.height as u32,
222            self.transfer_function,
223        );
224        Ok(())
225    }
226}
pic_scale/colors/oklab_scaler.rs

pic_scale/colors/
oklab_scaler.rs
