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::{oklab_to_rgb, oklab_to_rgba, rgb_to_oklab, rgba_to_oklab, TransferFunction};
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_cbcr8<'a>(
60        &'a self,
61        _: &ImageStore<'a, u8, 2>,
62        _: &mut ImageStoreMut<'a, u8, 2>,
63    ) -> Result<(), PicScaleError> {
64        unimplemented!()
65    }
66
67    fn resize_rgb<'a>(
68        &self,
69        store: &ImageStore<'a, u8, 3>,
70        into: &mut ImageStoreMut<'a, u8, 3>,
71    ) -> Result<(), PicScaleError> {
72        let new_size = into.get_size();
73        into.validate()?;
74        store.validate()?;
75        if store.width == 0 || store.height == 0 || new_size.width == 0 || new_size.height == 0 {
76            return Err(PicScaleError::ZeroImageDimensions);
77        }
78
79        if check_image_size_overflow(store.width, store.height, store.channels) {
80            return Err(PicScaleError::SourceImageIsTooLarge);
81        }
82
83        if check_image_size_overflow(new_size.width, new_size.height, store.channels) {
84            return Err(PicScaleError::DestinationImageIsTooLarge);
85        }
86
87        if store.width == new_size.width && store.height == new_size.height {
88            store.copied_to_mut(into);
89            return Ok(());
90        }
91
92        const COMPONENTS: usize = 3;
93
94        let mut target_vertical = vec![f32::default(); store.width * store.height * COMPONENTS];
95
96        let mut lab_store = ImageStoreMut::<f32, COMPONENTS>::from_slice(
97            &mut target_vertical,
98            store.width,
99            store.height,
100        )?;
101        lab_store.bit_depth = into.bit_depth;
102
103        let lab_stride =
104            lab_store.width as u32 * COMPONENTS as u32 * std::mem::size_of::<f32>() as u32;
105        rgb_to_oklab(
106            store.buffer.as_ref(),
107            store.width as u32 * COMPONENTS as u32,
108            lab_store.buffer.borrow_mut(),
109            lab_stride,
110            lab_store.width as u32,
111            lab_store.height as u32,
112            self.transfer_function,
113        );
114
115        let new_immutable_store = ImageStore::<f32, COMPONENTS> {
116            buffer: std::borrow::Cow::Owned(target_vertical),
117            channels: COMPONENTS,
118            width: store.width,
119            height: store.height,
120            stride: store.width * COMPONENTS,
121            bit_depth: into.bit_depth,
122        };
123
124        let mut new_store = ImageStoreMut::<f32, COMPONENTS>::alloc(into.width, into.height);
125        self.scaler
126            .resize_rgb_f32(&new_immutable_store, &mut new_store)?;
127
128        let new_lab_stride =
129            new_store.width as u32 * COMPONENTS as u32 * std::mem::size_of::<f32>() as u32;
130
131        oklab_to_rgb(
132            new_store.buffer.borrow(),
133            new_lab_stride,
134            into.buffer.borrow_mut(),
135            into.width as u32 * COMPONENTS as u32,
136            new_store.width as u32,
137            new_store.height as u32,
138            self.transfer_function,
139        );
140        Ok(())
141    }
142
143    fn resize_rgba<'a>(
144        &'a self,
145        store: &ImageStore<'a, u8, 4>,
146        into: &mut ImageStoreMut<'a, u8, 4>,
147        premultiply_alpha: bool,
148    ) -> Result<(), PicScaleError> {
149        let new_size = into.get_size();
150        into.validate()?;
151        store.validate()?;
152        if store.width == 0 || store.height == 0 || new_size.width == 0 || new_size.height == 0 {
153            return Err(PicScaleError::ZeroImageDimensions);
154        }
155
156        if check_image_size_overflow(store.width, store.height, store.channels) {
157            return Err(PicScaleError::SourceImageIsTooLarge);
158        }
159
160        if check_image_size_overflow(new_size.width, new_size.height, store.channels) {
161            return Err(PicScaleError::DestinationImageIsTooLarge);
162        }
163
164        if store.width == new_size.width && store.height == new_size.height {
165            store.copied_to_mut(into);
166            return Ok(());
167        }
168
169        const COMPONENTS: usize = 4;
170
171        let mut target_vertical = vec![f32::default(); store.width * store.height * COMPONENTS];
172
173        let mut lab_store = ImageStoreMut::<f32, COMPONENTS>::from_slice(
174            &mut target_vertical,
175            store.width,
176            store.height,
177        )?;
178        lab_store.bit_depth = into.bit_depth;
179
180        let lab_stride =
181            lab_store.width as u32 * COMPONENTS as u32 * std::mem::size_of::<f32>() as u32;
182        rgba_to_oklab(
183            store.buffer.as_ref(),
184            store.width as u32 * COMPONENTS as u32,
185            lab_store.buffer.borrow_mut(),
186            lab_stride,
187            lab_store.width as u32,
188            lab_store.height as u32,
189            self.transfer_function,
190        );
191
192        let new_immutable_store = ImageStore::<f32, COMPONENTS> {
193            buffer: std::borrow::Cow::Owned(target_vertical),
194            channels: COMPONENTS,
195            width: store.width,
196            height: store.height,
197            stride: store.width * COMPONENTS,
198            bit_depth: into.bit_depth,
199        };
200
201        let mut new_store = ImageStoreMut::<f32, COMPONENTS>::alloc(into.width, into.height);
202        self.scaler
203            .resize_rgba_f32(&new_immutable_store, &mut new_store, premultiply_alpha)?;
204
205        let new_lab_stride =
206            new_store.width as u32 * COMPONENTS as u32 * std::mem::size_of::<f32>() as u32;
207
208        oklab_to_rgba(
209            new_store.buffer.borrow(),
210            new_lab_stride,
211            into.buffer.borrow_mut(),
212            into.width as u32 * COMPONENTS as u32,
213            new_store.width as u32,
214            new_store.height as u32,
215            self.transfer_function,
216        );
217        Ok(())
218    }
219}
pic_scale/colors/oklab_scaler.rs

pic_scale/colors/
oklab_scaler.rs
