119 lines
4.8 KiB
Rust
119 lines
4.8 KiB
Rust
/*
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* // Copyright (c) Radzivon Bartoshyk 8/2025. All rights reserved.
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* //
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* // Redistribution and use in source and binary forms, with or without modification,
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* // are permitted provided that the following conditions are met:
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* //
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* // 1. Redistributions of source code must retain the above copyright notice, this
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* // list of conditions and the following disclaimer.
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* //
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* // 2. Redistributions in binary form must reproduce the above copyright notice,
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* // this list of conditions and the following disclaimer in the documentation
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* // and/or other materials provided with the distribution.
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* //
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* // 3. Neither the name of the copyright holder nor the names of its
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* // contributors may be used to endorse or promote products derived from
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* // this software without specific prior written permission.
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* //
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* // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* // AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* // IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* // DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* // FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* // DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* // SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* // CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* // OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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use crate::conversions::katana::KatanaPostFinalizationStage;
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use crate::{CmsError, DataColorSpace, Layout, PointeeSizeExpressible};
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use num_traits::AsPrimitive;
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use std::marker::PhantomData;
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pub(crate) struct InjectAlphaStage<I> {
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pub(crate) dst_layout: Layout,
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pub(crate) target_color_space: DataColorSpace,
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pub(crate) _phantom: PhantomData<I>,
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pub(crate) bit_depth: usize,
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}
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pub(crate) struct CopyAlphaStage<I> {
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pub(crate) src_layout: Layout,
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pub(crate) dst_layout: Layout,
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pub(crate) target_color_space: DataColorSpace,
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pub(crate) _phantom: PhantomData<I>,
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}
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impl<T: Copy + Default + AsPrimitive<f32> + PointeeSizeExpressible + Send + Sync>
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KatanaPostFinalizationStage<T> for InjectAlphaStage<T>
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where
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f32: AsPrimitive<T>,
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{
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fn finalize(&self, _: &[T], dst: &mut [T]) -> Result<(), CmsError> {
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let norm_value: T = (if T::FINITE {
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((1u32 << self.bit_depth) - 1) as f32
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} else {
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1.0
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})
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.as_();
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if self.dst_layout == Layout::Rgba && self.target_color_space == DataColorSpace::Rgb {
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for dst in dst.chunks_exact_mut(self.dst_layout.channels()) {
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dst[3] = norm_value;
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}
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} else if self.dst_layout == Layout::GrayAlpha
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&& self.target_color_space == DataColorSpace::Gray
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{
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for dst in dst.chunks_exact_mut(self.dst_layout.channels()) {
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dst[1] = norm_value;
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}
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}
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Ok(())
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}
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}
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impl<T: Copy + Default + AsPrimitive<f32> + PointeeSizeExpressible + Send + Sync>
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KatanaPostFinalizationStage<T> for CopyAlphaStage<T>
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where
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f32: AsPrimitive<T>,
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{
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fn finalize(&self, src: &[T], dst: &mut [T]) -> Result<(), CmsError> {
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if self.dst_layout == Layout::Rgba && self.target_color_space == DataColorSpace::Rgb {
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if self.src_layout == Layout::Rgba {
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for (src, dst) in src
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.chunks_exact(self.src_layout.channels())
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.zip(dst.chunks_exact_mut(self.dst_layout.channels()))
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{
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dst[3] = src[3];
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}
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} else if self.src_layout == Layout::GrayAlpha {
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for (src, dst) in src
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.chunks_exact(self.src_layout.channels())
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.zip(dst.chunks_exact_mut(self.dst_layout.channels()))
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{
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dst[3] = src[1];
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}
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}
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} else if self.dst_layout == Layout::GrayAlpha
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&& self.target_color_space == DataColorSpace::Gray
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{
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if self.src_layout == Layout::Rgba {
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for (src, dst) in src
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.chunks_exact(self.src_layout.channels())
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.zip(dst.chunks_exact_mut(self.dst_layout.channels()))
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{
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dst[1] = src[3];
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}
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} else if self.src_layout == Layout::GrayAlpha {
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for (src, dst) in src
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.chunks_exact(self.src_layout.channels())
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.zip(dst.chunks_exact_mut(self.dst_layout.channels()))
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{
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dst[1] = src[1];
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}
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}
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}
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Ok(())
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}
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}
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