pic_scale/colors/
sigmoidal_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 */
29
30use crate::pic_scale_error::PicScaleError;
31use crate::scaler::ScalingF32;
32use crate::support::check_image_size_overflow;
33use crate::{ImageStore, ImageStoreMut, ResamplingFunction, Scaler, Scaling, ThreadingPolicy};
34use colorutils_rs::{rgb_to_sigmoidal, rgba_to_sigmoidal, sigmoidal_to_rgb, sigmoidal_to_rgba};
35
36#[derive(Debug, Copy, Clone)]
37/// Converts image to *sigmoidized* components scales it and convert back
38pub struct SigmoidalScaler {
39    pub(crate) scaler: Scaler,
40}
41
42impl SigmoidalScaler {
43    pub fn new(filter: ResamplingFunction) -> Self {
44        SigmoidalScaler {
45            scaler: Scaler::new(filter),
46        }
47    }
48}
49
50impl Scaling for SigmoidalScaler {
51    fn set_threading_policy(&mut self, threading_policy: ThreadingPolicy) {
52        self.scaler.set_threading_policy(threading_policy)
53    }
54
55    fn resize_plane<'a>(
56        &'a self,
57        _: &ImageStore<'a, u8, 1>,
58        _: &mut ImageStoreMut<'a, u8, 1>,
59    ) -> Result<(), PicScaleError> {
60        unimplemented!()
61    }
62
63    fn resize_cbcr8<'a>(
64        &'a self,
65        _: &ImageStore<'a, u8, 2>,
66        _: &mut ImageStoreMut<'a, u8, 2>,
67    ) -> Result<(), PicScaleError> {
68        unimplemented!()
69    }
70
71    fn resize_gray_alpha<'a>(
72        &'a self,
73        _: &ImageStore<'a, u8, 2>,
74        _: &mut ImageStoreMut<'a, u8, 2>,
75        _: bool,
76    ) -> Result<(), PicScaleError> {
77        unimplemented!()
78    }
79
80    fn resize_rgb<'a>(
81        &self,
82        store: &ImageStore<'a, u8, 3>,
83        into: &mut ImageStoreMut<'a, u8, 3>,
84    ) -> Result<(), PicScaleError> {
85        let new_size = into.get_size();
86        into.validate()?;
87        store.validate()?;
88        if store.width == 0 || store.height == 0 || new_size.width == 0 || new_size.height == 0 {
89            return Err(PicScaleError::ZeroImageDimensions);
90        }
91
92        if check_image_size_overflow(store.width, store.height, store.channels) {
93            return Err(PicScaleError::SourceImageIsTooLarge);
94        }
95
96        if check_image_size_overflow(new_size.width, new_size.height, store.channels) {
97            return Err(PicScaleError::DestinationImageIsTooLarge);
98        }
99
100        if store.width == new_size.width && store.height == new_size.height {
101            store.copied_to_mut(into);
102            return Ok(());
103        }
104
105        const CN: usize = 3;
106
107        let mut target_vertical = vec![f32::default(); store.width * store.height * CN];
108
109        let mut lab_store =
110            ImageStoreMut::<f32, CN>::from_slice(&mut target_vertical, store.width, store.height)?;
111        lab_store.bit_depth = into.bit_depth;
112
113        let lab_stride = lab_store.width as u32 * CN as u32 * size_of::<f32>() as u32;
114        rgb_to_sigmoidal(
115            store.buffer.as_ref(),
116            store.width as u32 * CN as u32,
117            lab_store.buffer.borrow_mut(),
118            lab_stride,
119            lab_store.width as u32,
120            lab_store.height as u32,
121        );
122
123        let new_immutable_store = ImageStore::<f32, CN> {
124            buffer: std::borrow::Cow::Owned(target_vertical),
125            channels: CN,
126            width: store.width,
127            height: store.height,
128            stride: store.width * CN,
129            bit_depth: into.bit_depth,
130        };
131
132        let mut new_store = ImageStoreMut::<f32, CN>::alloc(into.width, into.height);
133        self.scaler
134            .resize_rgb_f32(&new_immutable_store, &mut new_store)?;
135
136        let new_lab_stride = new_store.width as u32 * CN as u32 * size_of::<f32>() as u32;
137
138        sigmoidal_to_rgb(
139            new_store.buffer.borrow(),
140            new_lab_stride,
141            into.buffer.borrow_mut(),
142            into.width as u32 * CN as u32,
143            new_store.width as u32,
144            new_store.height as u32,
145        );
146        Ok(())
147    }
148
149    fn resize_rgba<'a>(
150        &'a self,
151        store: &ImageStore<'a, u8, 4>,
152        into: &mut ImageStoreMut<'a, u8, 4>,
153        premultiply_alpha: bool,
154    ) -> Result<(), PicScaleError> {
155        let new_size = into.get_size();
156        into.validate()?;
157        store.validate()?;
158        if store.width == 0 || store.height == 0 || new_size.width == 0 || new_size.height == 0 {
159            return Err(PicScaleError::ZeroImageDimensions);
160        }
161
162        if check_image_size_overflow(store.width, store.height, store.channels) {
163            return Err(PicScaleError::SourceImageIsTooLarge);
164        }
165
166        if check_image_size_overflow(new_size.width, new_size.height, store.channels) {
167            return Err(PicScaleError::DestinationImageIsTooLarge);
168        }
169
170        if store.width == new_size.width && store.height == new_size.height {
171            store.copied_to_mut(into);
172            return Ok(());
173        }
174
175        const CN: usize = 4;
176
177        let mut target_vertical = vec![f32::default(); store.width * store.height * CN];
178
179        let mut lab_store =
180            ImageStoreMut::<f32, CN>::from_slice(&mut target_vertical, store.width, store.height)?;
181        lab_store.bit_depth = into.bit_depth;
182
183        let lab_stride = lab_store.width as u32 * CN as u32 * size_of::<f32>() as u32;
184        rgba_to_sigmoidal(
185            store.buffer.as_ref(),
186            store.width as u32 * CN as u32,
187            lab_store.buffer.borrow_mut(),
188            lab_stride,
189            lab_store.width as u32,
190            lab_store.height as u32,
191        );
192
193        let new_immutable_store = ImageStore::<f32, CN> {
194            buffer: std::borrow::Cow::Owned(target_vertical),
195            channels: CN,
196            width: store.width,
197            height: store.height,
198            stride: store.width * CN,
199            bit_depth: into.bit_depth,
200        };
201
202        let mut new_store = ImageStoreMut::<f32, CN>::alloc(into.width, into.height);
203        self.scaler
204            .resize_rgba_f32(&new_immutable_store, &mut new_store, premultiply_alpha)?;
205
206        let new_lab_stride = new_store.width as u32 * CN as u32 * size_of::<f32>() as u32;
207
208        sigmoidal_to_rgba(
209            new_store.buffer.borrow(),
210            new_lab_stride,
211            into.buffer.borrow_mut(),
212            into.width as u32 * CN as u32,
213            new_store.width as u32,
214            new_store.height as u32,
215        );
216        Ok(())
217    }
218}
pic_scale/colors/sigmoidal_scaler.rs

pic_scale/colors/
sigmoidal_scaler.rs
