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authorValentin Popov <valentin@popov.link>2024-07-19 15:37:58 +0300
committerValentin Popov <valentin@popov.link>2024-07-19 15:37:58 +0300
commita990de90fe41456a23e58bd087d2f107d321f3a1 (patch)
tree15afc392522a9e85dc3332235e311b7d39352ea9 /vendor/exr/src/image/read/any_channels.rs
parent3d48cd3f81164bbfc1a755dc1d4a9a02f98c8ddd (diff)
downloadfparkan-a990de90fe41456a23e58bd087d2f107d321f3a1.tar.xz
fparkan-a990de90fe41456a23e58bd087d2f107d321f3a1.zip
Deleted vendor folder
Diffstat (limited to 'vendor/exr/src/image/read/any_channels.rs')
-rw-r--r--vendor/exr/src/image/read/any_channels.rs128
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diff --git a/vendor/exr/src/image/read/any_channels.rs b/vendor/exr/src/image/read/any_channels.rs
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--- a/vendor/exr/src/image/read/any_channels.rs
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-//! How to read arbitrary channels.
-
-use crate::image::*;
-use crate::meta::header::{Header};
-use crate::error::{Result, UnitResult};
-use crate::block::UncompressedBlock;
-use crate::block::lines::{LineRef};
-use crate::math::Vec2;
-use crate::meta::attribute::{Text, ChannelDescription};
-use crate::image::read::layers::{ReadChannels, ChannelsReader};
-use crate::block::chunk::TileCoordinates;
-
-/// A template that creates an [AnyChannelsReader] for each layer in the image.
-/// This loads all channels for each layer.
-/// The `ReadSamples` can, for example, be [ReadFlatSamples] or [ReadAllLevels<ReadFlatSamples>].
-#[derive(Debug, Clone, Eq, PartialEq)]
-pub struct ReadAnyChannels<ReadSamples> {
-
- /// The sample reading specification
- pub read_samples: ReadSamples
-}
-
-/// A template that creates a new [`SampleReader`] for each channel in each layer.
-pub trait ReadSamples {
-
- /// The type of the temporary samples reader
- type Reader: SamplesReader;
-
- /// Create a single reader for a single channel of a layer
- fn create_sample_reader(&self, header: &Header, channel: &ChannelDescription) -> Result<Self::Reader>;
-}
-
-/// Processes pixel blocks from a file and accumulates them into a collection of arbitrary channels.
-/// Loads all channels for each layer.
-#[derive(Debug, Clone, Eq, PartialEq)]
-pub struct AnyChannelsReader<SamplesReader> {
-
- /// Stores a separate sample reader per channel in the layer
- sample_channels_reader: SmallVec<[AnyChannelReader<SamplesReader>; 4]>,
-}
-
-/// Processes pixel blocks from a file and accumulates them into a single arbitrary channel.
-#[derive(Debug, Clone, Eq, PartialEq)]
-pub struct AnyChannelReader<SamplesReader> {
-
- /// The custom reader that accumulates the pixel data for a single channel
- samples: SamplesReader,
-
- /// Temporarily accumulated meta data.
- name: Text,
-
- /// Temporarily accumulated meta data.
- sampling_rate: Vec2<usize>,
-
- /// Temporarily accumulated meta data.
- quantize_linearly: bool,
-}
-
-/// Processes pixel blocks from a file and accumulates them into a single pixel channel.
-/// For example, stores thousands of "Red" pixel values for a single layer.
-pub trait SamplesReader {
-
- /// The type of resulting sample storage
- type Samples;
-
- /// Specify whether a single block of pixels should be loaded from the file
- fn filter_block(&self, tile: TileCoordinates) -> bool;
-
- /// Load a single pixel line, which has not been filtered, into the reader, accumulating the sample data
- fn read_line(&mut self, line: LineRef<'_>) -> UnitResult;
-
- /// Deliver the final accumulated sample storage for the image
- fn into_samples(self) -> Self::Samples;
-}
-
-
-impl<'s, S: 's + ReadSamples> ReadChannels<'s> for ReadAnyChannels<S> {
- type Reader = AnyChannelsReader<S::Reader>;
-
- fn create_channels_reader(&self, header: &Header) -> Result<Self::Reader> {
- let samples: Result<_> = header.channels.list.iter()
- .map(|channel: &ChannelDescription| Ok(AnyChannelReader {
- samples: self.read_samples.create_sample_reader(header, channel)?,
- name: channel.name.clone(),
- sampling_rate: channel.sampling,
- quantize_linearly: channel.quantize_linearly
- }))
- .collect();
-
- Ok(AnyChannelsReader { sample_channels_reader: samples? })
- }
-}
-
-impl<S: SamplesReader> ChannelsReader for AnyChannelsReader<S> {
- type Channels = AnyChannels<S::Samples>;
-
- fn filter_block(&self, tile: TileCoordinates) -> bool {
- self.sample_channels_reader.iter().any(|channel| channel.samples.filter_block(tile))
- }
-
- fn read_block(&mut self, header: &Header, decompressed: UncompressedBlock) -> UnitResult {
- /*for (bytes, line) in LineIndex::lines_in_block(decompressed.index, header) {
- let channel = self.sample_channels_reader.get_mut(line.channel).unwrap();
- channel.samples.read_line(LineSlice { location: line, value: &decompressed.data[bytes] })?;
- }
-
- Ok(())*/
- for line in decompressed.lines(&header.channels) {
- self.sample_channels_reader[line.location.channel].samples.read_line(line)?;
- }
-
- Ok(())
- }
-
- fn into_channels(self) -> Self::Channels {
- AnyChannels { // not using `new()` as the channels are already sorted
- list: self.sample_channels_reader.into_iter()
- .map(|channel| AnyChannel {
- sample_data: channel.samples.into_samples(),
-
- name: channel.name,
- quantize_linearly: channel.quantize_linearly,
- sampling: channel.sampling_rate
- })
- .collect()
- }
- }
-}