pic_scale/colors/
xyz_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 colorutils_rs::{
31    SRGB_TO_XYZ_D65, TransferFunction, XYZ_TO_SRGB_D65, rgba_to_xyz_with_alpha, srgb_to_xyz,
32    xyz_to_srgb, xyz_with_alpha_to_rgba,
33};
34
35use crate::pic_scale_error::{PicScaleError, try_vec};
36use crate::scaler::{Scaling, ScalingF32};
37use crate::support::check_image_size_overflow;
38use crate::{ImageStore, ImageStoreMut, ResamplingFunction, Scaler, ThreadingPolicy};
39
40#[derive(Debug, Copy, Clone)]
41/// Converts image to CIE XYZ components scales it and convert back
42pub struct XYZScaler {
43    pub(crate) scaler: Scaler,
44}
45
46impl XYZScaler {
47    pub fn new(filter: ResamplingFunction) -> Self {
48        XYZScaler {
49            scaler: Scaler::new(filter),
50        }
51    }
52}
53
54impl Scaling for XYZScaler {
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        &'a 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 = try_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
119        srgb_to_xyz(
120            store.buffer.as_ref(),
121            store.width as u32 * CN as u32,
122            lab_store.buffer.borrow_mut(),
123            lab_stride,
124            lab_store.width as u32,
125            lab_store.height as u32,
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>::try_alloc(into.width, into.height)?;
138
139        self.scaler
140            .resize_rgb_f32(&new_immutable_store, &mut new_store)?;
141        let new_lab_stride = new_store.width as u32 * CN as u32 * size_of::<f32>() as u32;
142        xyz_to_srgb(
143            new_store.buffer.borrow(),
144            new_lab_stride,
145            into.buffer.borrow_mut(),
146            into.width as u32 * CN as u32,
147            new_store.width as u32,
148            new_store.height as u32,
149        );
150        Ok(())
151    }
152
153    fn resize_rgba<'a>(
154        &'a self,
155        store: &ImageStore<'a, u8, 4>,
156        into: &mut ImageStoreMut<'a, u8, 4>,
157        premultiply_alpha: bool,
158    ) -> Result<(), PicScaleError> {
159        let new_size = into.get_size();
160        into.validate()?;
161        store.validate()?;
162        if store.width == 0 || store.height == 0 || new_size.width == 0 || new_size.height == 0 {
163            return Err(PicScaleError::ZeroImageDimensions);
164        }
165
166        if check_image_size_overflow(store.width, store.height, store.channels) {
167            return Err(PicScaleError::SourceImageIsTooLarge);
168        }
169
170        if check_image_size_overflow(new_size.width, new_size.height, store.channels) {
171            return Err(PicScaleError::DestinationImageIsTooLarge);
172        }
173
174        if store.width == new_size.width && store.height == new_size.height {
175            store.copied_to_mut(into);
176            return Ok(());
177        }
178
179        const CN: usize = 4;
180
181        let mut target_vertical = try_vec![f32::default(); store.width * store.height * CN];
182
183        let mut lab_store =
184            ImageStoreMut::<f32, CN>::from_slice(&mut target_vertical, store.width, store.height)?;
185        lab_store.bit_depth = into.bit_depth;
186
187        let lab_stride = lab_store.width as u32 * CN as u32 * size_of::<f32>() as u32;
188
189        rgba_to_xyz_with_alpha(
190            store.buffer.as_ref(),
191            store.width as u32 * CN as u32,
192            lab_store.buffer.borrow_mut(),
193            lab_stride,
194            lab_store.width as u32,
195            lab_store.height as u32,
196            &SRGB_TO_XYZ_D65,
197            TransferFunction::Srgb,
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>::try_alloc(into.width, into.height)?;
210
211        self.scaler
212            .resize_rgba_f32(&new_immutable_store, &mut new_store, premultiply_alpha)?;
213        let new_lab_stride = new_store.width as u32 * CN as u32 * size_of::<f32>() as u32;
214        xyz_with_alpha_to_rgba(
215            new_store.buffer.borrow(),
216            new_lab_stride,
217            into.buffer.borrow_mut(),
218            into.width as u32 * CN as u32,
219            new_store.width as u32,
220            new_store.height as u32,
221            &XYZ_TO_SRGB_D65,
222            TransferFunction::Srgb,
223        );
224        Ok(())
225    }
226}
pic_scale/colors/xyz_scaler.rs

pic_scale/colors/
xyz_scaler.rs
