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    rgba_to_xyz_with_alpha, srgb_to_xyz, xyz_to_srgb, xyz_with_alpha_to_rgba, TransferFunction,
32    SRGB_TO_XYZ_D65, XYZ_TO_SRGB_D65,
33};
34
35use crate::pic_scale_error::PicScaleError;
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_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        &'a 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
106        srgb_to_xyz(
107            store.buffer.as_ref(),
108            store.width as u32 * COMPONENTS as u32,
109            lab_store.buffer.borrow_mut(),
110            lab_stride,
111            lab_store.width as u32,
112            lab_store.height as u32,
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
126        self.scaler
127            .resize_rgb_f32(&new_immutable_store, &mut new_store)?;
128        let new_lab_stride =
129            new_store.width as u32 * COMPONENTS as u32 * std::mem::size_of::<f32>() as u32;
130        xyz_to_srgb(
131            new_store.buffer.borrow(),
132            new_lab_stride,
133            into.buffer.borrow_mut(),
134            into.width as u32 * COMPONENTS as u32,
135            new_store.width as u32,
136            new_store.height as u32,
137        );
138        Ok(())
139    }
140
141    fn resize_rgba<'a>(
142        &'a self,
143        store: &ImageStore<'a, u8, 4>,
144        into: &mut ImageStoreMut<'a, u8, 4>,
145        premultiply_alpha: bool,
146    ) -> Result<(), PicScaleError> {
147        let new_size = into.get_size();
148        into.validate()?;
149        store.validate()?;
150        if store.width == 0 || store.height == 0 || new_size.width == 0 || new_size.height == 0 {
151            return Err(PicScaleError::ZeroImageDimensions);
152        }
153
154        if check_image_size_overflow(store.width, store.height, store.channels) {
155            return Err(PicScaleError::SourceImageIsTooLarge);
156        }
157
158        if check_image_size_overflow(new_size.width, new_size.height, store.channels) {
159            return Err(PicScaleError::DestinationImageIsTooLarge);
160        }
161
162        if store.width == new_size.width && store.height == new_size.height {
163            store.copied_to_mut(into);
164            return Ok(());
165        }
166
167        const COMPONENTS: usize = 4;
168
169        let mut target_vertical = vec![f32::default(); store.width * store.height * COMPONENTS];
170
171        let mut lab_store = ImageStoreMut::<f32, COMPONENTS>::from_slice(
172            &mut target_vertical,
173            store.width,
174            store.height,
175        )?;
176        lab_store.bit_depth = into.bit_depth;
177
178        let lab_stride =
179            lab_store.width as u32 * COMPONENTS as u32 * std::mem::size_of::<f32>() as u32;
180
181        rgba_to_xyz_with_alpha(
182            store.buffer.as_ref(),
183            store.width as u32 * COMPONENTS as u32,
184            lab_store.buffer.borrow_mut(),
185            lab_stride,
186            lab_store.width as u32,
187            lab_store.height as u32,
188            &SRGB_TO_XYZ_D65,
189            TransferFunction::Srgb,
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
203        self.scaler
204            .resize_rgba_f32(&new_immutable_store, &mut new_store, premultiply_alpha)?;
205        let new_lab_stride =
206            new_store.width as u32 * COMPONENTS as u32 * std::mem::size_of::<f32>() as u32;
207        xyz_with_alpha_to_rgba(
208            new_store.buffer.borrow(),
209            new_lab_stride,
210            into.buffer.borrow_mut(),
211            into.width as u32 * COMPONENTS as u32,
212            new_store.width as u32,
213            new_store.height as u32,
214            &XYZ_TO_SRGB_D65,
215            TransferFunction::Srgb,
216        );
217        Ok(())
218    }
219}
pic_scale/colors/xyz_scaler.rs

pic_scale/colors/
xyz_scaler.rs
