Deleted vendor folder

7 files changed, 0 insertions, 1552 deletions

diff --git a/vendor/exr/src/image/read/any_channels.rs b/vendor/exr/src/image/read/any_channels.rs
deleted file mode 100644
index 054a7c3..0000000
--- a/vendor/exr/src/image/read/any_channels.rs
+++ /dev/null
@@ -1,128 +0,0 @@
-//! 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()
-        }
-    }
-}
diff --git a/vendor/exr/src/image/read/image.rs b/vendor/exr/src/image/read/image.rs
deleted file mode 100644
index fce2f52..0000000
--- a/vendor/exr/src/image/read/image.rs
+++ /dev/null
@@ -1,209 +0,0 @@
-//! The last wrapper of image readers, finally containing the [`from_file(path)`] method.
-//! This completes the builder and reads a complete image.
-
-use crate::image::*;
-use crate::meta::header::{Header, ImageAttributes};
-use crate::error::{Result, UnitResult};
-use crate::block::{UncompressedBlock, BlockIndex};
-use crate::block::chunk::TileCoordinates;
-use std::path::Path;
-use std::io::{Read, BufReader};
-use std::io::Seek;
-use crate::meta::MetaData;
-use crate::block::reader::ChunksReader;
-
-/// Specify whether to read the image in parallel,
-/// whether to use pedantic error handling,
-/// and a callback for the reading progress.
-#[derive(Debug, Clone)]
-pub struct ReadImage<OnProgress, ReadLayers> {
-    on_progress: OnProgress,
-    read_layers: ReadLayers,
-    pedantic: bool,
-    parallel: bool,
-}
-
-impl<F, L> ReadImage<F, L> where F: FnMut(f64)
-{
-    /// Uses relaxed error handling and parallel decompression.
-    pub fn new(read_layers: L, on_progress: F) -> Self {
-        Self {
-            on_progress, read_layers,
-            pedantic: false, parallel: true,
-        }
-    }
-
-    /// Specify that any missing or unusual information should result in an error.
-    /// Otherwise, `exrs` will try to compute or ignore missing information.
-    ///
-    /// If pedantic is true, then an error will be returned as soon as anything is missing in the file,
-    /// or two values in the image contradict each other. If pedantic is false,
-    /// then only fatal errors will be thrown. By default, reading an image is not pedantic,
-    /// which means that slightly invalid files might still be readable.
-    /// For example, if some attribute is missing but can be recomputed, this flag decides whether an error is thrown.
-    /// Or if the pedantic flag is true and there are still bytes left after the decompression algorithm finished,
-    /// an error is thrown, because this should not happen and something might be wrong with the file.
-    /// Or if your application is a target of attacks, or if you want to emulate the original C++ library,
-    /// you might want to switch to pedantic reading.
-    pub fn pedantic(self) -> Self { Self { pedantic: true, ..self } }
-
-    /// Specify that multiple pixel blocks should never be decompressed using multiple threads at once.
-    /// This might be slower but uses less memory and less synchronization.
-    pub fn non_parallel(self) -> Self { Self { parallel: false, ..self } }
-
-    /// Specify a function to be called regularly throughout the loading process.
-    /// Replaces all previously specified progress functions in this reader.
-    pub fn on_progress<OnProgress>(self, on_progress: OnProgress) -> ReadImage<OnProgress, L>
-        where OnProgress: FnMut(f64)
-    {
-        ReadImage {
-            on_progress,
-            read_layers: self.read_layers,
-            pedantic: self.pedantic,
-            parallel: self.parallel
-        }
-    }
-
-
-    /// Read the exr image from a file.
-    /// Use [`ReadImage::read_from_unbuffered`] instead, if you do not have a file.
-    #[inline]
-    #[must_use]
-    pub fn from_file<Layers>(self, path: impl AsRef<Path>) -> Result<Image<Layers>>
-        where for<'s> L: ReadLayers<'s, Layers = Layers>
-    {
-        self.from_unbuffered(std::fs::File::open(path)?)
-    }
-
-    /// Buffer the reader and then read the exr image from it.
-    /// Use [`ReadImage::read_from_buffered`] instead, if your reader is an in-memory reader.
-    /// Use [`ReadImage::read_from_file`] instead, if you have a file path.
-    #[inline]
-    #[must_use]
-    pub fn from_unbuffered<Layers>(self, unbuffered: impl Read + Seek) -> Result<Image<Layers>>
-        where for<'s> L: ReadLayers<'s, Layers = Layers>
-    {
-        self.from_buffered(BufReader::new(unbuffered))
-    }
-
-    /// Read the exr image from a buffered reader.
-    /// Use [`ReadImage::read_from_file`] instead, if you have a file path.
-    /// Use [`ReadImage::read_from_unbuffered`] instead, if this is not an in-memory reader.
-    // TODO Use Parallel<> Wrapper to only require sendable byte source where parallel decompression is required
-    #[must_use]
-    pub fn from_buffered<Layers>(self, buffered: impl Read + Seek) -> Result<Image<Layers>>
-        where for<'s> L: ReadLayers<'s, Layers = Layers>
-    {
-        let chunks = crate::block::read(buffered, self.pedantic)?;
-        self.from_chunks(chunks)
-    }
-
-    /// Read the exr image from an initialized chunks reader
-    /// that has already extracted the meta data from the file.
-    /// Use [`ReadImage::read_from_file`] instead, if you have a file path.
-    /// Use [`ReadImage::read_from_buffered`] instead, if this is an in-memory reader.
-    // TODO Use Parallel<> Wrapper to only require sendable byte source where parallel decompression is required
-    #[must_use]
-    pub fn from_chunks<Layers>(mut self, chunks_reader: crate::block::reader::Reader<impl Read + Seek>) -> Result<Image<Layers>>
-        where for<'s> L: ReadLayers<'s, Layers = Layers>
-    {
-        let Self { pedantic, parallel, ref mut on_progress, ref mut read_layers } = self;
-
-        let layers_reader = read_layers.create_layers_reader(chunks_reader.headers())?;
-        let mut image_collector = ImageWithAttributesReader::new(chunks_reader.headers(), layers_reader)?;
-
-        let block_reader = chunks_reader
-            .filter_chunks(pedantic, |meta, tile, block| {
-                image_collector.filter_block(meta, tile, block)
-            })?
-            .on_progress(on_progress);
-
-        // TODO propagate send requirement further upwards
-        if parallel {
-            block_reader.decompress_parallel(pedantic, |meta_data, block|{
-                image_collector.read_block(&meta_data.headers, block)
-            })?;
-        }
-        else {
-            block_reader.decompress_sequential(pedantic, |meta_data, block|{
-                image_collector.read_block(&meta_data.headers, block)
-            })?;
-        }
-
-        Ok(image_collector.into_image())
-    }
-}
-
-/// Processes blocks from a file and collects them into a complete `Image`.
-#[derive(Debug, Clone, PartialEq)]
-pub struct ImageWithAttributesReader<L> {
-    image_attributes: ImageAttributes,
-    layers_reader: L,
-}
-
-impl<L> ImageWithAttributesReader<L> where L: LayersReader {
-
-    /// A new image reader with image attributes.
-    pub fn new(headers: &[Header], layers_reader: L) -> Result<Self>
-    {
-        Ok(ImageWithAttributesReader {
-            image_attributes: headers.first().as_ref().expect("invalid headers").shared_attributes.clone(),
-            layers_reader,
-        })
-    }
-
-    /// Specify whether a single block of pixels should be loaded from the file
-    fn filter_block(&self, meta: &MetaData, tile: TileCoordinates, block: BlockIndex) -> bool {
-        self.layers_reader.filter_block(meta, tile, block)
-    }
-
-    /// Load a single pixel block, which has not been filtered, into the reader, accumulating the image
-    fn read_block(&mut self, headers: &[Header], block: UncompressedBlock) -> UnitResult {
-        self.layers_reader.read_block(headers, block)
-    }
-
-    /// Deliver the complete accumulated image
-    fn into_image(self) -> Image<L::Layers> {
-        Image {
-            attributes: self.image_attributes,
-            layer_data: self.layers_reader.into_layers()
-        }
-    }
-}
-
-
-/// A template that creates a `LayerReader` for each layer in the file.
-pub trait ReadLayers<'s> {
-
-    /// The type of the resulting Layers
-    type Layers;
-
-    /// The type of the temporary layer reader
-    type Reader: LayersReader<Layers = Self::Layers>;
-
-    /// Create a single reader for a single layer
-    fn create_layers_reader(&'s self, headers: &[Header]) -> Result<Self::Reader>;
-
-    /// Specify that all attributes should be read from an image.
-    /// Use `from_file(path)` on the return value of this method to actually decode an image.
-    fn all_attributes(self) -> ReadImage<fn(f64), Self> where Self: Sized {
-        ReadImage::new(self, ignore_progress)
-    }
-}
-
-/// Processes pixel blocks from a file and accumulates them into a single image layer.
-pub trait LayersReader {
-
-    /// The type of resulting layers
-    type Layers;
-
-    /// Specify whether a single block of pixels should be loaded from the file
-    fn filter_block(&self, meta: &MetaData, tile: TileCoordinates, block: BlockIndex) -> bool;
-
-    /// Load a single pixel block, which has not been filtered, into the reader, accumulating the layer
-    fn read_block(&mut self, headers: &[Header], block: UncompressedBlock) -> UnitResult;
-
-    /// Deliver the final accumulated layers for the image
-    fn into_layers(self) -> Self::Layers;
-}
-
diff --git a/vendor/exr/src/image/read/layers.rs b/vendor/exr/src/image/read/layers.rs
deleted file mode 100644
index 75159c2..0000000
--- a/vendor/exr/src/image/read/layers.rs
+++ /dev/null
@@ -1,204 +0,0 @@
-//! How to read either a single or a list of layers.
-
-use crate::image::*;
-use crate::meta::header::{Header, LayerAttributes};
-use crate::error::{Result, UnitResult, Error};
-use crate::block::{UncompressedBlock, BlockIndex};
-use crate::math::Vec2;
-use crate::image::read::image::{ReadLayers, LayersReader};
-use crate::block::chunk::TileCoordinates;
-use crate::meta::MetaData;
-
-/// Specify to read all channels, aborting if any one is invalid.
-/// [`ReadRgbaChannels`] or [`ReadAnyChannels<ReadFlatSamples>`].
-#[derive(Debug, Clone, Eq, PartialEq)]
-pub struct ReadAllLayers<ReadChannels> {
-
-    /// The channel reading specification
-    pub read_channels: ReadChannels,
-}
-
-/// Specify to read only the first layer which meets the previously specified requirements
-// FIXME do not throw error on deep data but just skip it!
-#[derive(Debug, Clone, Eq, PartialEq)]
-pub struct ReadFirstValidLayer<ReadChannels> {
-
-    /// The channel reading specification
-    pub read_channels: ReadChannels,
-}
-
-/// A template that creates a [`ChannelsReader`] once for all channels per layer.
-pub trait ReadChannels<'s> {
-
-    /// The type of the temporary channels reader
-    type Reader: ChannelsReader;
-
-    /// Create a single reader for all channels of a specific layer
-    fn create_channels_reader(&'s self, header: &Header) -> Result<Self::Reader>;
-
-
-    /// Read only the first layer which meets the previously specified requirements
-    /// For example, skips layers with deep data, if specified earlier.
-    /// Aborts if the image contains no layers.
-    // TODO test if this filters non-deep layers while ignoring deep data layers!
-    fn first_valid_layer(self) -> ReadFirstValidLayer<Self> where Self:Sized { ReadFirstValidLayer { read_channels: self } }
-
-// FIXME do not throw error on deep data but just skip it!
-
-
-    /// Reads all layers, including an empty list. Aborts if any of the layers are invalid,
-    /// even if only one of the layers contains unexpected data.
-    fn all_layers(self) -> ReadAllLayers<Self> where Self:Sized { ReadAllLayers { read_channels: self } }
-
-    // TODO pub fn all_valid_layers(self) -> ReadAllValidLayers<Self> { ReadAllValidLayers { read_channels: self } }
-}
-
-
-/// Processes pixel blocks from a file and accumulates them into a list of layers.
-/// For example, `ChannelsReader` can be
-/// [`SpecificChannelsReader`] or [`AnyChannelsReader<FlatSamplesReader>`].
-#[derive(Debug, Clone, PartialEq)]
-pub struct AllLayersReader<ChannelsReader> {
-    layer_readers: SmallVec<[LayerReader<ChannelsReader>; 2]>, // TODO unpack struct?
-}
-
-/// Processes pixel blocks from a file and accumulates them into a single layers, using only the first.
-/// For example, `ChannelsReader` can be
-/// `SpecificChannelsReader` or `AnyChannelsReader<FlatSamplesReader>`.
-#[derive(Debug, Clone, PartialEq)]
-pub struct FirstValidLayerReader<ChannelsReader> {
-    layer_reader: LayerReader<ChannelsReader>,
-    layer_index: usize,
-}
-
-/// Processes pixel blocks from a file and accumulates them into a single layers.
-/// For example, `ChannelsReader` can be
-/// `SpecificChannelsReader` or `AnyChannelsReader<FlatSamplesReader>`.
-#[derive(Debug, Clone, PartialEq)]
-pub struct LayerReader<ChannelsReader> {
-    channels_reader: ChannelsReader,
-    attributes: LayerAttributes,
-    size: Vec2<usize>,
-    encoding: Encoding
-}
-
-/// Processes pixel blocks from a file and accumulates them into multiple channels per layer.
-pub trait ChannelsReader {
-
-    /// The type of the resulting channel collection
-    type Channels;
-
-    /// Specify whether a single block of pixels should be loaded from the file
-    fn filter_block(&self, tile: TileCoordinates) -> bool;
-
-    /// Load a single pixel block, which has not been filtered, into the reader, accumulating the channel data
-    fn read_block(&mut self, header: &Header, block: UncompressedBlock) -> UnitResult;
-
-    /// Deliver the final accumulated channel collection for the image
-    fn into_channels(self) -> Self::Channels;
-}
-
-
-impl<C> LayerReader<C> {
-    fn new(header: &Header, channels_reader: C) -> Result<Self> {
-        Ok(LayerReader {
-            channels_reader,
-            attributes: header.own_attributes.clone(),
-            size: header.layer_size,
-            encoding: Encoding {
-                compression: header.compression,
-                line_order: header.line_order,
-                blocks: match header.blocks {
-                    crate::meta::BlockDescription::ScanLines => Blocks::ScanLines,
-                    crate::meta::BlockDescription::Tiles(TileDescription { tile_size, .. }) => Blocks::Tiles(tile_size)
-                },
-            },
-        })
-    }
-}
-
-impl<'s, C> ReadLayers<'s> for ReadAllLayers<C> where C: ReadChannels<'s> {
-    type Layers = Layers<<C::Reader as ChannelsReader>::Channels>;
-    type Reader = AllLayersReader<C::Reader>;
-
-    fn create_layers_reader(&'s self, headers: &[Header]) -> Result<Self::Reader> {
-        let readers: Result<_> = headers.iter()
-            .map(|header| LayerReader::new(header, self.read_channels.create_channels_reader(header)?))
-            .collect();
-
-        Ok(AllLayersReader {
-            layer_readers: readers?
-        })
-    }
-}
-
-impl<C> LayersReader for AllLayersReader<C> where C: ChannelsReader {
-    type Layers = Layers<C::Channels>;
-
-    fn filter_block(&self, _: &MetaData, tile: TileCoordinates, block: BlockIndex) -> bool {
-        let layer = self.layer_readers.get(block.layer).expect("invalid layer index argument");
-        layer.channels_reader.filter_block(tile)
-    }
-
-    fn read_block(&mut self, headers: &[Header], block: UncompressedBlock) -> UnitResult {
-        self.layer_readers
-            .get_mut(block.index.layer).expect("invalid layer index argument")
-            .channels_reader.read_block(headers.get(block.index.layer).expect("invalid header index in block"), block)
-    }
-
-    fn into_layers(self) -> Self::Layers {
-        self.layer_readers
-            .into_iter()
-            .map(|layer| Layer {
-                channel_data: layer.channels_reader.into_channels(),
-                attributes: layer.attributes,
-                size: layer.size,
-                encoding: layer.encoding
-            })
-            .collect()
-    }
-}
-
-
-impl<'s, C> ReadLayers<'s> for ReadFirstValidLayer<C> where C: ReadChannels<'s> {
-    type Layers = Layer<<C::Reader as ChannelsReader>::Channels>;
-    type Reader = FirstValidLayerReader<C::Reader>;
-
-    fn create_layers_reader(&'s self, headers: &[Header]) -> Result<Self::Reader> {
-        headers.iter().enumerate()
-            .flat_map(|(index, header)|
-                self.read_channels.create_channels_reader(header)
-                    .and_then(|reader| Ok(FirstValidLayerReader {
-                        layer_reader: LayerReader::new(header, reader)?,
-                        layer_index: index
-                    }))
-                    .ok()
-            )
-            .next()
-            .ok_or(Error::invalid("no layer in the image matched your specified requirements"))
-    }
-}
-
-
-impl<C> LayersReader for FirstValidLayerReader<C> where C: ChannelsReader {
-    type Layers = Layer<C::Channels>;
-
-    fn filter_block(&self, _: &MetaData, tile: TileCoordinates, block: BlockIndex) -> bool {
-        block.layer == self.layer_index && self.layer_reader.channels_reader.filter_block(tile)
-    }
-
-    fn read_block(&mut self, headers: &[Header], block: UncompressedBlock) -> UnitResult {
-        debug_assert_eq!(block.index.layer, self.layer_index, "block should have been filtered out");
-        self.layer_reader.channels_reader.read_block(&headers[self.layer_index], block)
-    }
-
-    fn into_layers(self) -> Self::Layers {
-        Layer {
-            channel_data: self.layer_reader.channels_reader.into_channels(),
-            attributes: self.layer_reader.attributes,
-            size: self.layer_reader.size,
-            encoding: self.layer_reader.encoding
-        }
-    }
-}
-
diff --git a/vendor/exr/src/image/read/levels.rs b/vendor/exr/src/image/read/levels.rs
deleted file mode 100644
index 5705903..0000000
--- a/vendor/exr/src/image/read/levels.rs
+++ /dev/null
@@ -1,219 +0,0 @@
-//! How to read a set of resolution levels.
-
-use crate::meta::*;
-use crate::image::*;
-use crate::error::*;
-use crate::meta::attribute::*;
-use crate::image::read::any_channels::*;
-use crate::block::chunk::TileCoordinates;
-use crate::image::read::specific_channels::*;
-use crate::image::recursive::*;
-use crate::math::Vec2;
-use crate::block::lines::LineRef;
-use crate::block::samples::*;
-use crate::meta::header::{Header};
-
-
-// Note: In the resulting image, the `FlatSamples` are placed
-// directly inside the channels, without `LargestLevel<>` indirection
-/// Specify to read only the highest resolution level, skipping all smaller variations.
-/// The sample storage can be [`ReadFlatSamples`].
-#[derive(Debug, Clone, Eq, PartialEq)]
-pub struct ReadLargestLevel<DeepOrFlatSamples> {
-
-    /// The sample reading specification
-    pub read_samples: DeepOrFlatSamples
-}
-
-
-// FIXME rgba levels???
-
-// Read the largest level, directly, without intermediate structs
-impl<DeepOrFlatSamples> ReadLargestLevel<DeepOrFlatSamples> {
-
-    /// Read all arbitrary channels in each layer.
-    pub fn all_channels(self) -> ReadAnyChannels<DeepOrFlatSamples> { ReadAnyChannels { read_samples: self.read_samples } } // Instead of Self, the `FlatSamples` are used directly
-
-    /// Read only layers that contain rgba channels. Skips any other channels in the layer.
-    /// The alpha channel will contain the value `1.0` if no alpha channel can be found in the image.
-    ///
-    /// Using two closures, define how to store the pixels.
-    /// The first closure creates an image, and the second closure inserts a single pixel.
-    /// The type of the pixel can be defined by the second closure;
-    /// it must be a tuple containing four values, each being either `f16`, `f32`, `u32` or `Sample`.
-    ///
-    /// Throws an error for images with deep data or subsampling.
-    /// Use `specific_channels` or `all_channels` if you want to read something other than rgba.
-    pub fn rgba_channels<R,G,B,A, Create, Set, Pixels>(
-        self, create_pixels: Create, set_pixel: Set
-    ) -> CollectPixels<
-        ReadOptionalChannel<ReadRequiredChannel<ReadRequiredChannel<ReadRequiredChannel<NoneMore, R>, G>, B>, A>,
-        (R, G, B, A), Pixels, Create, Set
-    >
-        where
-            R: FromNativeSample, G: FromNativeSample, B: FromNativeSample, A: FromNativeSample,
-            Create: Fn(Vec2<usize>, &RgbaChannels) -> Pixels,
-            Set: Fn(&mut Pixels, Vec2<usize>, (R,G,B,A)),
-    {
-        self.specific_channels()
-            .required("R").required("G").required("B")
-            .optional("A", A::from_f32(1.0))
-            .collect_pixels(create_pixels, set_pixel)
-    }
-
-    /// Read only layers that contain rgb channels. Skips any other channels in the layer.
-    ///
-    /// Using two closures, define how to store the pixels.
-    /// The first closure creates an image, and the second closure inserts a single pixel.
-    /// The type of the pixel can be defined by the second closure;
-    /// it must be a tuple containing three values, each being either `f16`, `f32`, `u32` or `Sample`.
-    ///
-    /// Throws an error for images with deep data or subsampling.
-    /// Use `specific_channels` or `all_channels` if you want to read something other than rgb.
-    pub fn rgb_channels<R,G,B, Create, Set, Pixels>(
-        self, create_pixels: Create, set_pixel: Set
-    ) -> CollectPixels<
-        ReadRequiredChannel<ReadRequiredChannel<ReadRequiredChannel<NoneMore, R>, G>, B>,
-        (R, G, B), Pixels, Create, Set
-    >
-        where
-            R: FromNativeSample, G: FromNativeSample, B: FromNativeSample,
-            Create: Fn(Vec2<usize>, &RgbChannels) -> Pixels,
-            Set: Fn(&mut Pixels, Vec2<usize>, (R,G,B)),
-    {
-        self.specific_channels()
-            .required("R").required("G").required("B")
-            .collect_pixels(create_pixels, set_pixel)
-    }
-
-    /// Read only layers that contain the specified channels, skipping any other channels in the layer.
-    /// Further specify which channels should be included by calling `.required("ChannelName")`
-    /// or `.optional("ChannelName", default_value)` on the result of this function.
-    /// Call `collect_pixels` afterwards to define the pixel container for your set of channels.
-    ///
-    /// Throws an error for images with deep data or subsampling.
-    pub fn specific_channels(self) -> ReadZeroChannels {
-        ReadZeroChannels { }
-    }
-}
-
-/// Specify to read all contained resolution levels from the image, if any.
-#[derive(Debug, Clone, Eq, PartialEq)]
-pub struct ReadAllLevels<DeepOrFlatSamples> {
-
-    /// The sample reading specification
-    pub read_samples: DeepOrFlatSamples
-}
-
-impl<ReadDeepOrFlatSamples> ReadAllLevels<ReadDeepOrFlatSamples> {
-
-    /// Read all arbitrary channels in each layer.
-    pub fn all_channels(self) -> ReadAnyChannels<Self> { ReadAnyChannels { read_samples: self } }
-
-    // TODO specific channels for multiple resolution levels
-
-}
-
-/*pub struct ReadLevels<S> {
-    read_samples: S,
-}*/
-
-/// Processes pixel blocks from a file and accumulates them into multiple levels per channel.
-#[derive(Debug, Clone, Eq, PartialEq)]
-pub struct AllLevelsReader<SamplesReader> {
-    levels: Levels<SamplesReader>,
-}
-
-/// A template that creates a [`SamplesReader`] once for each resolution level.
-pub trait ReadSamplesLevel {
-
-    /// The type of the temporary level reader
-    type Reader: SamplesReader;
-
-    /// Create a single reader for a single resolution level
-    fn create_samples_level_reader(&self, header: &Header, channel: &ChannelDescription, level: Vec2<usize>, resolution: Vec2<usize>) -> Result<Self::Reader>;
-}
-
-
-impl<S: ReadSamplesLevel> ReadSamples for ReadAllLevels<S> {
-    type Reader = AllLevelsReader<S::Reader>;
-
-    fn create_sample_reader(&self, header: &Header, channel: &ChannelDescription) -> Result<Self::Reader> {
-        let data_size = header.layer_size / channel.sampling;
-
-        let levels = {
-            if let crate::meta::BlockDescription::Tiles(tiles) = &header.blocks {
-                match tiles.level_mode {
-                    LevelMode::Singular => Levels::Singular(self.read_samples.create_samples_level_reader(header, channel, Vec2(0,0), header.layer_size)?),
-
-                    LevelMode::MipMap => Levels::Mip {
-                        rounding_mode: tiles.rounding_mode,
-                        level_data: {
-                            let round = tiles.rounding_mode;
-                            let maps: Result<LevelMaps<S::Reader>> = mip_map_levels(round, data_size)
-                                .map(|(index, level_size)| self.read_samples.create_samples_level_reader(header, channel, Vec2(index, index), level_size))
-                                .collect();
-
-                            maps?
-                        },
-                    },
-
-                    // TODO put this into Levels::new(..) ?
-                    LevelMode::RipMap => Levels::Rip {
-                        rounding_mode: tiles.rounding_mode,
-                        level_data: {
-                            let round = tiles.rounding_mode;
-                            let level_count_x = compute_level_count(round, data_size.width());
-                            let level_count_y = compute_level_count(round, data_size.height());
-                            let maps: Result<LevelMaps<S::Reader>> = rip_map_levels(round, data_size)
-                                .map(|(index, level_size)| self.read_samples.create_samples_level_reader(header, channel, index, level_size))
-                                .collect();
-
-                            RipMaps {
-                                map_data: maps?,
-                                level_count: Vec2(level_count_x, level_count_y)
-                            }
-                        },
-                    },
-                }
-            }
-
-            // scan line blocks never have mip maps
-            else {
-                Levels::Singular(self.read_samples.create_samples_level_reader(header, channel, Vec2(0, 0), data_size)?)
-            }
-        };
-
-        Ok(AllLevelsReader { levels })
-    }
-}
-
-
-impl<S: SamplesReader> SamplesReader for AllLevelsReader<S> {
-    type Samples = Levels<S::Samples>;
-
-    fn filter_block(&self, _: TileCoordinates) -> bool {
-        true
-    }
-
-    fn read_line(&mut self, line: LineRef<'_>) -> UnitResult {
-        self.levels.get_level_mut(line.location.level)?.read_line(line)
-    }
-
-    fn into_samples(self) -> Self::Samples {
-        match self.levels {
-            Levels::Singular(level) => Levels::Singular(level.into_samples()),
-            Levels::Mip { rounding_mode, level_data } => Levels::Mip {
-                rounding_mode, level_data: level_data.into_iter().map(|s| s.into_samples()).collect(),
-            },
-
-            Levels::Rip { rounding_mode, level_data } => Levels::Rip {
-                rounding_mode,
-                level_data: RipMaps {
-                    level_count: level_data.level_count,
-                    map_data: level_data.map_data.into_iter().map(|s| s.into_samples()).collect(),
-                }
-            },
-        }
-    }
-}
diff --git a/vendor/exr/src/image/read/mod.rs b/vendor/exr/src/image/read/mod.rs
deleted file mode 100644
index c03fc90..0000000
--- a/vendor/exr/src/image/read/mod.rs
+++ /dev/null
@@ -1,207 +0,0 @@
-
-//! Read an exr image.
-//!
-//! For great flexibility and customization, use the `read()` function.
-//! The return value of the `read()` function must be further customized before reading a file.
-
-//!
-//! For very simple applications, you can alternatively use one of these functions:
-//!
-//! 1. `read_first_rgba_layer_from_file(path, your_constructor, your_pixel_setter)`:
-//!     You specify how to store the pixels.
-//!     The first layer containing rgba channels is then loaded from the file.
-//!     Fails if no rgba layer can be found.
-//!
-//! 1. `read_all_rgba_layers_from_file(path, your_constructor, your_pixel_setter)`:
-//!     You specify how to store the pixels.
-//!     All layers containing rgba channels are then loaded from the file.
-//!     Fails if any layer in the image does not contain rgba channels.
-//!
-//! 1. `read_first_flat_layer_from_file(path)`:
-//!     The first layer containing non-deep data with arbitrary channels is loaded from the file.
-//!     Fails if no non-deep layer can be found.
-//!
-//! 1. `read_all_flat_layers_from_file(path)`:
-//!     All layers containing non-deep data with arbitrary channels are loaded from the file.
-//!     Fails if any layer in the image contains deep data.
-//!
-//! 1. `read_all_data_from_file(path)`:
-//!     All layers with arbitrary channels and all resolution levels are extracted from the file.
-//!
-//!     Note: Currently does not support deep data, and currently fails
-//!     if any layer in the image contains deep data.
-//!
-
-// The following three stages are internally used to read an image.
-// 1. `ReadImage` - The specification. Contains everything the user wants to tell us about loading an image.
-//    The data in this structure will be instantiated and might be borrowed.
-// 2. `ImageReader` - The temporary reader. Based on the specification of the blueprint,
-//    a reader is instantiated, once for each layer.
-//    This data structure accumulates the image data from the file.
-//    It also owns temporary data and references the blueprint.
-// 3. `Image` - The clean image. The accumulated data from the Reader
-//    is converted to the clean image structure, without temporary data.
-
-pub mod image;
-pub mod layers;
-pub mod any_channels;
-pub mod levels;
-pub mod samples;
-pub mod specific_channels;
-
-use crate::error::{Result};
-use crate::image::read::samples::{ReadFlatSamples};
-use std::path::Path;
-use crate::image::{AnyImage, AnyChannels, FlatSamples, Image, Layer, FlatImage, PixelLayersImage, RgbaChannels};
-use crate::image::read::image::ReadLayers;
-use crate::image::read::layers::ReadChannels;
-use crate::math::Vec2;
-use crate::prelude::{PixelImage};
-use crate::block::samples::FromNativeSample;
-
-
-/// All resolution levels, all channels, all layers.
-/// Does not support deep data yet. Uses parallel decompression and relaxed error handling.
-/// Inspect the source code of this function if you need customization.
-pub fn read_all_data_from_file(path: impl AsRef<Path>) -> Result<AnyImage> {
-    read()
-        .no_deep_data() // TODO deep data
-        .all_resolution_levels()
-        .all_channels()
-        .all_layers()
-        .all_attributes()
-        .from_file(path)
-}
-
-// FIXME do not throw error on deep data but just skip it!
-/// No deep data, no resolution levels, all channels, all layers.
-/// Uses parallel decompression and relaxed error handling.
-/// Inspect the source code of this function if you need customization.
-pub fn read_all_flat_layers_from_file(path: impl AsRef<Path>) -> Result<FlatImage> {
-    read()
-        .no_deep_data()
-        .largest_resolution_level()
-        .all_channels()
-        .all_layers()
-        .all_attributes()
-        .from_file(path)
-}
-
-/// No deep data, no resolution levels, all channels, first layer.
-/// Uses parallel decompression and relaxed error handling.
-/// Inspect the source code of this function if you need customization.
-pub fn read_first_flat_layer_from_file(path: impl AsRef<Path>) -> Result<Image<Layer<AnyChannels<FlatSamples>>>> {
-    read()
-        .no_deep_data()
-        .largest_resolution_level()
-        .all_channels()
-        .first_valid_layer()
-        .all_attributes()
-        .from_file(path)
-}
-
-/// No deep data, no resolution levels, rgba channels, all layers.
-/// If a single layer does not contain rgba data, this method returns an error.
-/// Uses parallel decompression and relaxed error handling.
-/// `Create` and `Set` can be closures, see the examples for more information.
-/// Inspect the source code of this function if you need customization.
-/// The alpha channel will contain the value `1.0` if no alpha channel can be found in the image.
-///
-/// Using two closures, define how to store the pixels.
-/// The first closure creates an image, and the second closure inserts a single pixel.
-/// The type of the pixel can be defined by the second closure;
-/// it must be a tuple containing four values, each being either `f16`, `f32`, `u32` or `Sample`.
-// FIXME Set and Create should not need to be static
-pub fn read_all_rgba_layers_from_file<R,G,B,A, Set:'static, Create:'static, Pixels: 'static>(
-    path: impl AsRef<Path>, create: Create, set_pixel: Set
-)
-    -> Result<PixelLayersImage<Pixels, RgbaChannels>>
-    where
-        R: FromNativeSample, G: FromNativeSample, B: FromNativeSample, A: FromNativeSample,
-        Create: Fn(Vec2<usize>, &RgbaChannels) -> Pixels, // TODO type alias? CreateRgbaPixels<Pixels=Pixels>,
-        Set: Fn(&mut Pixels, Vec2<usize>, (R,G,B,A)),
-{
-    read()
-        .no_deep_data()
-        .largest_resolution_level()
-        .rgba_channels(create, set_pixel)
-        .all_layers()
-        .all_attributes()
-        .from_file(path)
-}
-
-/// No deep data, no resolution levels, rgba channels, choosing the first layer with rgba channels.
-/// Uses parallel decompression and relaxed error handling.
-/// `Create` and `Set` can be closures, see the examples for more information.
-/// Inspect the source code of this function if you need customization.
-/// The alpha channel will contain the value `1.0` if no alpha channel can be found in the image.
-///
-/// Using two closures, define how to store the pixels.
-/// The first closure creates an image, and the second closure inserts a single pixel.
-/// The type of the pixel can be defined by the second closure;
-/// it must be a tuple containing four values, each being either `f16`, `f32`, `u32` or `Sample`.
-// FIXME Set and Create should not need to be static
-pub fn read_first_rgba_layer_from_file<R,G,B,A, Set:'static, Create:'static, Pixels: 'static>(
-    path: impl AsRef<Path>, create: Create, set_pixel: Set
-)
-    -> Result<PixelImage<Pixels, RgbaChannels>>
-    where
-        R: FromNativeSample, G: FromNativeSample, B: FromNativeSample, A: FromNativeSample,
-        Create: Fn(Vec2<usize>, &RgbaChannels) -> Pixels, // TODO type alias? CreateRgbaPixels<Pixels=Pixels>,
-        Set: Fn(&mut Pixels, Vec2<usize>, (R,G,B,A)),
-{
-    read()
-        .no_deep_data()
-        .largest_resolution_level()
-        .rgba_channels(create, set_pixel)
-        .first_valid_layer()
-        .all_attributes()
-        .from_file(path)
-}
-
-
-/// Utilizes the builder pattern to configure an image reader. This is the initial struct.
-#[derive(Copy, Clone, Debug, Eq, PartialEq)]
-pub struct ReadBuilder;
-
-/// Create a reader which can be used to load an exr image.
-/// Allows you to exactly specify how to load the image, for example:
-///
-/// ```no_run
-///     use exr::prelude::*;
-///
-///     // the type of the this image depends on the chosen options
-///     let image = read()
-///         .no_deep_data() // (currently required)
-///         .largest_resolution_level() // or `all_resolution_levels()`
-///         .all_channels() // or `rgba_channels(constructor, setter)`
-///         .all_layers() // or `first_valid_layer()`
-///         .all_attributes() // (currently required)
-///         .on_progress(|progress| println!("progress: {:.1}", progress*100.0)) // optional
-///         .from_file("image.exr").unwrap(); // or `from_buffered(my_byte_slice)`
-/// ```
-///
-/// You can alternatively use one of the following simpler functions:
-/// 1. `read_first_flat_layer_from_file`
-/// 1. `read_all_rgba_layers_from_file`
-/// 1. `read_all_flat_layers_from_file`
-/// 1. `read_all_data_from_file`
-///
-// TODO not panic but skip deep layers!
-pub fn read() -> ReadBuilder { ReadBuilder }
-
-impl ReadBuilder {
-
-    /// Specify to handle only one sample per channel, disabling "deep data".
-    // TODO not panic but skip deep layers!
-    pub fn no_deep_data(self) -> ReadFlatSamples { ReadFlatSamples }
-
-    // pub fn any_resolution_levels() -> ReadBuilder<> {}
-
-    // TODO
-    // e. g. `let sum = reader.any_channels_with(|sample, sum| sum += sample)`
-    // e. g. `let floats = reader.any_channels_with(|sample, f32_samples| f32_samples[index] = sample as f32)`
-    // pub fn no_deep_data_with <S> (self, storage: S) -> FlatSamplesWith<S> {  }
-
-    // pub fn flat_and_deep_data(self) -> ReadAnySamples { ReadAnySamples }
-}
diff --git a/vendor/exr/src/image/read/samples.rs b/vendor/exr/src/image/read/samples.rs
deleted file mode 100644
index e03c3cc..0000000
--- a/vendor/exr/src/image/read/samples.rs
+++ /dev/null
@@ -1,122 +0,0 @@
-//! How to read samples (a grid of `f32`, `f16` or `u32` values).
-
-use crate::image::*;
-use crate::meta::header::{Header};
-use crate::error::{Result, UnitResult};
-use crate::block::lines::LineRef;
-use crate::math::Vec2;
-use crate::meta::attribute::{ChannelDescription, SampleType};
-use crate::image::read::any_channels::{SamplesReader, ReadSamples};
-use crate::image::read::levels::{ReadSamplesLevel, ReadAllLevels, ReadLargestLevel};
-use crate::block::chunk::TileCoordinates;
-// use crate::image::read::layers::ReadChannels;
-
-/// Specify to read only flat samples and no "deep data"
-// FIXME do not throw error on deep data but just skip it!
-#[derive(Debug, Copy, Clone, Eq, PartialEq)]
-pub struct ReadFlatSamples;
-// pub struct ReadAnySamples;
-
-impl ReadFlatSamples {
-
-    // TODO
-    // e. g. `let sum = reader.any_channels_with(|sample, sum| sum += sample)`
-    // pub fn any_channels_with <S> (self, storage: S) -> {  }
-
-    /// Specify to read only the highest resolution level, skipping all smaller variations.
-    pub fn largest_resolution_level(self) -> ReadLargestLevel<Self> { ReadLargestLevel { read_samples: self } }
-
-    /// Specify to read all contained resolution levels from the image, if any.
-    pub fn all_resolution_levels(self) -> ReadAllLevels<Self> { ReadAllLevels { read_samples: self } }
-
-    // TODO pub fn specific_resolution_level<F: Fn(&[Vec2<usize>])->usize >(self, select_level: F) -> ReadLevelBy<Self> { ReadAllLevels { read_samples: self } }
-}
-
-
-/*pub struct AnySamplesReader { TODO
-    resolution: Vec2<usize>,
-    samples: DeepAndFlatSamples
-}*/
-
-/// Processes pixel blocks from a file and accumulates them into a grid of samples, for example "Red" or "Alpha".
-#[derive(Debug, Clone, PartialEq)]
-pub struct FlatSamplesReader {
-    level: Vec2<usize>,
-    resolution: Vec2<usize>,
-    samples: FlatSamples
-}
-
-
-// only used when samples is directly inside a channel, without levels
-impl ReadSamples for ReadFlatSamples {
-    type Reader = FlatSamplesReader;
-
-    fn create_sample_reader(&self, header: &Header, channel: &ChannelDescription) -> Result<Self::Reader> {
-        self.create_samples_level_reader(header, channel, Vec2(0, 0), header.layer_size)
-    }
-}
-
-impl ReadSamplesLevel for ReadFlatSamples {
-    type Reader = FlatSamplesReader;
-
-    fn create_samples_level_reader(&self, _header: &Header, channel: &ChannelDescription, level: Vec2<usize>, resolution: Vec2<usize>) -> Result<Self::Reader> {
-        Ok(FlatSamplesReader {
-            level, resolution, // TODO sampling
-            samples: match channel.sample_type {
-                SampleType::F16 => FlatSamples::F16(vec![f16::ZERO; resolution.area()]),
-                SampleType::F32 => FlatSamples::F32(vec![0.0; resolution.area()]),
-                SampleType::U32 => FlatSamples::U32(vec![0; resolution.area()]),
-            }
-        })
-    }
-}
-
-
-impl SamplesReader for FlatSamplesReader {
-    type Samples = FlatSamples;
-
-    fn filter_block(&self, tile: TileCoordinates) -> bool {
-        tile.level_index == self.level
-    }
-
-    fn read_line(&mut self, line: LineRef<'_>) -> UnitResult {
-        let index = line.location;
-        let resolution = self.resolution;
-
-        // the index is generated by ourselves and must always be correct
-        debug_assert_eq!(index.level, self.level, "line should have been filtered");
-        debug_assert!(index.position.x() + index.sample_count <= resolution.width(), "line index calculation bug");
-        debug_assert!(index.position.y() < resolution.height(), "line index calculation bug");
-        debug_assert_ne!(resolution.0, 0, "sample size bug");
-
-        let start_index = index.position.y() * resolution.width() + index.position.x();
-        let end_index = start_index + index.sample_count;
-
-        debug_assert!(
-            start_index < end_index && end_index <= self.samples.len(),
-            "for resolution {:?}, this is an invalid line: {:?}",
-            self.resolution, line.location
-        );
-
-        match &mut self.samples {
-            FlatSamples::F16(samples) =>
-                line.read_samples_into_slice(&mut samples[start_index .. end_index])
-                    .expect("writing line bytes failed"),
-
-            FlatSamples::F32(samples) =>
-                line.read_samples_into_slice(&mut samples[start_index .. end_index])
-                    .expect("writing line bytes failed"),
-
-            FlatSamples::U32(samples) =>
-                line.read_samples_into_slice(&mut samples[start_index .. end_index])
-                    .expect("writing line bytes failed"),
-        }
-
-        Ok(())
-    }
-
-    fn into_samples(self) -> FlatSamples {
-        self.samples
-    }
-}
-
diff --git a/vendor/exr/src/image/read/specific_channels.rs b/vendor/exr/src/image/read/specific_channels.rs
deleted file mode 100644
index 375691c..0000000
--- a/vendor/exr/src/image/read/specific_channels.rs
+++ /dev/null
@@ -1,463 +0,0 @@
-//! How to read arbitrary but specific selection of arbitrary channels.
-//! This is not a zero-cost abstraction.
-
-use crate::image::recursive::*;
-use crate::block::samples::*;
-use crate::image::*;
-use crate::math::*;
-use crate::meta::header::*;
-use crate::error::*;
-use crate::block::UncompressedBlock;
-use crate::image::read::layers::{ChannelsReader, ReadChannels};
-use crate::block::chunk::TileCoordinates;
-
-use std::marker::PhantomData;
-use crate::io::Read;
-
-
-/// Can be attached one more channel reader.
-/// Call `required` or `optional` on this object to declare another channel to be read from the file.
-/// Call `collect_pixels` at last to define how the previously declared pixels should be stored.
-pub trait ReadSpecificChannel: Sized + CheckDuplicates {
-
-    /// A separate internal reader for the pixels. Will be of type `Recursive<_, SampleReader<_>>`,
-    /// depending on the pixels of the specific channel combination.
-    type RecursivePixelReader: RecursivePixelReader;
-
-    /// Create a separate internal reader for the pixels of the specific channel combination.
-    fn create_recursive_reader(&self, channels: &ChannelList) -> Result<Self::RecursivePixelReader>;
-
-    /// Plan to read an additional channel from the image, with the specified name.
-    /// If the channel cannot be found in the image when the image is read, the image will not be loaded.
-    /// The generic parameter can usually be inferred from the closure in `collect_pixels`.
-    fn required<Sample>(self, channel_name: impl Into<Text>) -> ReadRequiredChannel<Self, Sample> {
-        let channel_name = channel_name.into();
-        assert!(self.already_contains(&channel_name).not(), "a channel with the name `{}` is already defined", channel_name);
-        ReadRequiredChannel { channel_name, previous_channels: self, px: Default::default() }
-    }
-
-    /// Plan to read an additional channel from the image, with the specified name.
-    /// If the file does not contain this channel, the specified default sample will be returned instead.
-    /// You can check whether the channel has been loaded by
-    /// checking the presence of the optional channel description before instantiating your own image.
-    /// The generic parameter can usually be inferred from the closure in `collect_pixels`.
-    fn optional<Sample>(self, channel_name: impl Into<Text>, default_sample: Sample)
-        -> ReadOptionalChannel<Self, Sample>
-    {
-        let channel_name = channel_name.into();
-        assert!(self.already_contains(&channel_name).not(), "a channel with the name `{}` is already defined", channel_name);
-        ReadOptionalChannel { channel_name, previous_channels: self, default_sample }
-    }
-
-    /// Using two closures, define how to store the pixels.
-    /// The first closure creates an image, and the second closure inserts a single pixel.
-    /// The type of the pixel can be defined by the second closure;
-    /// it must be a tuple containing `f16`, `f32`, `u32` or `Sample` values.
-    /// See the examples for more information.
-    fn collect_pixels<Pixel, PixelStorage, CreatePixels, SetPixel>(
-        self, create_pixels: CreatePixels, set_pixel: SetPixel
-    ) -> CollectPixels<Self, Pixel, PixelStorage, CreatePixels, SetPixel>
-        where
-            <Self::RecursivePixelReader as RecursivePixelReader>::RecursivePixel: IntoTuple<Pixel>,
-            <Self::RecursivePixelReader as RecursivePixelReader>::RecursiveChannelDescriptions: IntoNonRecursive,
-            CreatePixels: Fn(
-                Vec2<usize>,
-                &<<Self::RecursivePixelReader as RecursivePixelReader>::RecursiveChannelDescriptions as IntoNonRecursive>::NonRecursive
-            ) -> PixelStorage,
-            SetPixel: Fn(&mut PixelStorage, Vec2<usize>, Pixel),
-    {
-        CollectPixels { read_channels: self, set_pixel, create_pixels, px: Default::default() }
-    }
-}
-
-/// A reader containing sub-readers for reading the pixel content of an image.
-pub trait RecursivePixelReader {
-
-    /// The channel descriptions from the image.
-    /// Will be converted to a tuple before being stored in `SpecificChannels<_, ChannelDescriptions>`.
-    type RecursiveChannelDescriptions;
-
-    /// Returns the channel descriptions based on the channels in the file.
-    fn get_descriptions(&self) -> Self::RecursiveChannelDescriptions;
-
-    /// The pixel type. Will be converted to a tuple at the end of the process.
-    type RecursivePixel: Copy + Default + 'static;
-
-    /// Read the line of pixels.
-    fn read_pixels<'s, FullPixel>(
-        &self, bytes: &'s[u8], pixels: &mut [FullPixel],
-        get_pixel: impl Fn(&mut FullPixel) -> &mut Self::RecursivePixel
-    );
-}
-
-// does not use the generic `Recursive` struct to reduce the number of angle brackets in the public api
-/// Used to read another specific channel from an image.
-/// Contains the previous `ReadChannels` objects.
-#[derive(Clone, Debug)]
-pub struct ReadOptionalChannel<ReadChannels, Sample> {
-    previous_channels: ReadChannels,
-    channel_name: Text,
-    default_sample: Sample,
-}
-
-// does not use the generic `Recursive` struct to reduce the number of angle brackets in the public api
-/// Used to read another specific channel from an image.
-/// Contains the previous `ReadChannels` objects.
-#[derive(Clone, Debug)]
-pub struct ReadRequiredChannel<ReadChannels, Sample> {
-    previous_channels: ReadChannels,
-    channel_name: Text,
-    px: PhantomData<Sample>,
-}
-
-/// Specifies how to collect all the specified channels into a number of individual pixels.
-#[derive(Copy, Clone, Debug)]
-pub struct CollectPixels<ReadChannels, Pixel, PixelStorage, CreatePixels, SetPixel> {
-    read_channels: ReadChannels,
-    create_pixels: CreatePixels,
-    set_pixel: SetPixel,
-    px: PhantomData<(Pixel, PixelStorage)>,
-}
-
-impl<Inner: CheckDuplicates, Sample> CheckDuplicates for ReadRequiredChannel<Inner, Sample> {
-    fn already_contains(&self, name: &Text) -> bool {
-        &self.channel_name == name || self.previous_channels.already_contains(name)
-    }
-}
-
-impl<Inner: CheckDuplicates, Sample> CheckDuplicates for ReadOptionalChannel<Inner, Sample> {
-    fn already_contains(&self, name: &Text) -> bool {
-        &self.channel_name == name || self.previous_channels.already_contains(name)
-    }
-}
-
-impl<'s, InnerChannels, Pixel, PixelStorage, CreatePixels, SetPixel: 's>
-ReadChannels<'s> for CollectPixels<InnerChannels, Pixel, PixelStorage, CreatePixels, SetPixel>
-    where
-        InnerChannels: ReadSpecificChannel,
-        <InnerChannels::RecursivePixelReader as RecursivePixelReader>::RecursivePixel: IntoTuple<Pixel>,
-        <InnerChannels::RecursivePixelReader as RecursivePixelReader>::RecursiveChannelDescriptions: IntoNonRecursive,
-        CreatePixels: Fn(Vec2<usize>, &<<InnerChannels::RecursivePixelReader as RecursivePixelReader>::RecursiveChannelDescriptions as IntoNonRecursive>::NonRecursive) -> PixelStorage,
-        SetPixel: Fn(&mut PixelStorage, Vec2<usize>, Pixel),
-{
-    type Reader = SpecificChannelsReader<
-        PixelStorage, &'s SetPixel,
-        InnerChannels::RecursivePixelReader,
-        Pixel,
-    >;
-
-    fn create_channels_reader(&'s self, header: &Header) -> Result<Self::Reader> {
-        if header.deep { return Err(Error::invalid("`SpecificChannels` does not support deep data yet")) }
-
-        let pixel_reader = self.read_channels.create_recursive_reader(&header.channels)?;
-        let channel_descriptions = pixel_reader.get_descriptions().into_non_recursive();// TODO not call this twice
-
-        let create = &self.create_pixels;
-        let pixel_storage = create(header.layer_size, &channel_descriptions);
-
-        Ok(SpecificChannelsReader {
-            set_pixel: &self.set_pixel,
-            pixel_storage,
-            pixel_reader,
-            px: Default::default()
-        })
-    }
-}
-
-/// The reader that holds the temporary data that is required to read some specified channels.
-#[derive(Copy, Clone, Debug)]
-pub struct SpecificChannelsReader<PixelStorage, SetPixel, PixelReader, Pixel> {
-    set_pixel: SetPixel,
-    pixel_storage: PixelStorage,
-    pixel_reader: PixelReader,
-    px: PhantomData<Pixel>
-}
-
-impl<PixelStorage, SetPixel, PxReader, Pixel>
-ChannelsReader for SpecificChannelsReader<PixelStorage, SetPixel, PxReader, Pixel>
-    where PxReader: RecursivePixelReader,
-          PxReader::RecursivePixel: IntoTuple<Pixel>,
-          PxReader::RecursiveChannelDescriptions: IntoNonRecursive,
-          SetPixel: Fn(&mut PixelStorage, Vec2<usize>, Pixel),
-{
-    type Channels = SpecificChannels<PixelStorage, <PxReader::RecursiveChannelDescriptions as IntoNonRecursive>::NonRecursive>;
-
-    fn filter_block(&self, tile: TileCoordinates) -> bool { tile.is_largest_resolution_level() } // TODO all levels
-
-    fn read_block(&mut self, header: &Header, block: UncompressedBlock) -> UnitResult {
-        let mut pixels = vec![PxReader::RecursivePixel::default(); block.index.pixel_size.width()]; // TODO allocate once in self
-
-        let byte_lines = block.data.chunks_exact(header.channels.bytes_per_pixel * block.index.pixel_size.width());
-        debug_assert_eq!(byte_lines.len(), block.index.pixel_size.height(), "invalid block lines split");
-
-        for (y_offset, line_bytes) in byte_lines.enumerate() { // TODO sampling
-            // this two-step copy method should be very cache friendly in theory, and also reduce sample_type lookup count
-            self.pixel_reader.read_pixels(line_bytes, &mut pixels, |px| px);
-
-            for (x_offset, pixel) in pixels.iter().enumerate() {
-                let set_pixel = &self.set_pixel;
-                set_pixel(&mut self.pixel_storage, block.index.pixel_position + Vec2(x_offset, y_offset), pixel.into_tuple());
-            }
-        }
-
-        Ok(())
-    }
-
-    fn into_channels(self) -> Self::Channels {
-        SpecificChannels { channels: self.pixel_reader.get_descriptions().into_non_recursive(), pixels: self.pixel_storage }
-    }
-}
-
-
-/// Read zero channels from an image. Call `with_named_channel` on this object
-/// to read as many channels as desired.
-pub type ReadZeroChannels = NoneMore;
-
-impl ReadSpecificChannel for NoneMore {
-    type RecursivePixelReader = NoneMore;
-    fn create_recursive_reader(&self, _: &ChannelList) -> Result<Self::RecursivePixelReader> { Ok(NoneMore) }
-}
-
-impl<DefaultSample, ReadChannels> ReadSpecificChannel for ReadOptionalChannel<ReadChannels, DefaultSample>
-    where ReadChannels: ReadSpecificChannel, DefaultSample: FromNativeSample + 'static,
-{
-    type RecursivePixelReader = Recursive<ReadChannels::RecursivePixelReader, OptionalSampleReader<DefaultSample>>;
-
-    fn create_recursive_reader(&self, channels: &ChannelList) -> Result<Self::RecursivePixelReader> {
-        debug_assert!(self.previous_channels.already_contains(&self.channel_name).not(), "duplicate channel name: {}", self.channel_name);
-
-        let inner_samples_reader = self.previous_channels.create_recursive_reader(channels)?;
-        let reader = channels.channels_with_byte_offset()
-            .find(|(_, channel)| channel.name == self.channel_name)
-            .map(|(channel_byte_offset, channel)| SampleReader {
-                channel_byte_offset, channel: channel.clone(),
-                px: Default::default()
-            });
-
-        Ok(Recursive::new(inner_samples_reader, OptionalSampleReader {
-            reader, default_sample: self.default_sample,
-        }))
-    }
-}
-
-impl<Sample, ReadChannels> ReadSpecificChannel for ReadRequiredChannel<ReadChannels, Sample>
-    where ReadChannels: ReadSpecificChannel, Sample: FromNativeSample + 'static
-{
-    type RecursivePixelReader = Recursive<ReadChannels::RecursivePixelReader, SampleReader<Sample>>;
-
-    fn create_recursive_reader(&self, channels: &ChannelList) -> Result<Self::RecursivePixelReader> {
-        let previous_samples_reader = self.previous_channels.create_recursive_reader(channels)?;
-        let (channel_byte_offset, channel) = channels.channels_with_byte_offset()
-                .find(|(_, channel)| channel.name == self.channel_name)
-                .ok_or_else(|| Error::invalid(format!(
-                    "layer does not contain all of your specified channels (`{}` is missing)",
-                    self.channel_name
-                )))?;
-
-        Ok(Recursive::new(previous_samples_reader, SampleReader { channel_byte_offset, channel: channel.clone(), px: Default::default() }))
-    }
-}
-
-/// Reader for a single channel. Generic over the concrete sample type (f16, f32, u32).
-#[derive(Clone, Debug)]
-pub struct SampleReader<Sample> {
-
-    /// to be multiplied with line width!
-    channel_byte_offset: usize,
-
-    channel: ChannelDescription,
-    px: PhantomData<Sample>
-}
-
-/// Reader for a single channel. Generic over the concrete sample type (f16, f32, u32).
-/// Can also skip reading a channel if it could not be found in the image.
-#[derive(Clone, Debug)]
-pub struct OptionalSampleReader<DefaultSample> {
-    reader: Option<SampleReader<DefaultSample>>,
-    default_sample: DefaultSample,
-}
-
-impl<Sample: FromNativeSample> SampleReader<Sample> {
-    fn read_own_samples<'s, FullPixel>(
-        &self, bytes: &'s[u8], pixels: &mut [FullPixel],
-        get_sample: impl Fn(&mut FullPixel) -> &mut Sample
-    ){
-        let start_index = pixels.len() * self.channel_byte_offset;
-        let byte_count = pixels.len() * self.channel.sample_type.bytes_per_sample();
-        let mut own_bytes_reader = &mut &bytes[start_index .. start_index + byte_count]; // TODO check block size somewhere
-        let mut samples_out = pixels.iter_mut().map(|pixel| get_sample(pixel));
-
-        // match the type once for the whole line, not on every single sample
-        match self.channel.sample_type {
-            SampleType::F16 => read_and_convert_all_samples_batched(
-                &mut own_bytes_reader, &mut samples_out,
-                Sample::from_f16s
-            ),
-
-            SampleType::F32 => read_and_convert_all_samples_batched(
-                &mut own_bytes_reader, &mut samples_out,
-                Sample::from_f32s
-            ),
-
-            SampleType::U32 => read_and_convert_all_samples_batched(
-                &mut own_bytes_reader, &mut samples_out,
-                Sample::from_u32s
-            ),
-        }
-
-        debug_assert!(samples_out.next().is_none(), "not all samples have been converted");
-        debug_assert!(own_bytes_reader.is_empty(), "bytes left after reading all samples");
-    }
-}
-
-
-/// Does the same as `convert_batch(in_bytes.chunks().map(From::from_bytes))`, but vectorized.
-/// Reads the samples for one line, using the sample type specified in the file,
-/// and then converts those to the desired sample types.
-/// Uses batches to allow vectorization, converting multiple values with one instruction.
-fn read_and_convert_all_samples_batched<'t, From, To>(
-    mut in_bytes: impl Read,
-    out_samples: &mut impl ExactSizeIterator<Item=&'t mut To>,
-    convert_batch: fn(&[From], &mut [To])
-) where From: Data + Default + Copy, To: 't + Default + Copy
-{
-    // this is not a global! why is this warning triggered?
-    #[allow(non_upper_case_globals)]
-    const batch_size: usize = 16;
-
-    let total_sample_count = out_samples.len();
-    let batch_count = total_sample_count / batch_size;
-    let remaining_samples_count = total_sample_count % batch_size;
-
-    let len_error_msg = "sample count was miscalculated";
-    let byte_error_msg = "error when reading from in-memory slice";
-
-    // write samples from a given slice to the output iterator. should be inlined.
-    let output_n_samples = &mut move |samples: &[To]| {
-        for converted_sample in samples {
-            *out_samples.next().expect(len_error_msg) = *converted_sample;
-        }
-    };
-
-    // read samples from the byte source into a given slice. should be inlined.
-    // todo: use #[inline] when available
-    // error[E0658]: attributes on expressions are experimental,
-    // see issue #15701 <https://github.com/rust-lang/rust/issues/15701> for more information
-    let read_n_samples = &mut move |samples: &mut [From]| {
-        Data::read_slice(&mut in_bytes, samples).expect(byte_error_msg);
-    };
-
-    // temporary arrays with fixed size, operations should be vectorized within these arrays
-    let mut source_samples_batch: [From; batch_size] = Default::default();
-    let mut desired_samples_batch: [To; batch_size] = Default::default();
-
-    // first convert all whole batches, size statically known to be 16 element arrays
-    for _ in 0 .. batch_count {
-        read_n_samples(&mut source_samples_batch);
-        convert_batch(source_samples_batch.as_slice(), desired_samples_batch.as_mut_slice());
-        output_n_samples(&desired_samples_batch);
-    }
-
-    // then convert a partial remaining batch, size known only at runtime
-    if remaining_samples_count != 0 {
-        let source_samples_batch = &mut source_samples_batch[..remaining_samples_count];
-        let desired_samples_batch = &mut desired_samples_batch[..remaining_samples_count];
-
-        read_n_samples(source_samples_batch);
-        convert_batch(source_samples_batch, desired_samples_batch);
-        output_n_samples(desired_samples_batch);
-    }
-}
-
-#[cfg(test)]
-mod test {
-    use super::*;
-
-    #[test]
-    fn equals_naive_f32(){
-        for total_array_size in [3, 7, 30, 41, 120, 10_423] {
-            let input_f32s = (0..total_array_size).map(|_| rand::random::<f32>()).collect::<Vec<f32>>();
-            let in_f32s_bytes = input_f32s.iter().cloned().flat_map(f32::to_le_bytes).collect::<Vec<u8>>();
-
-            let mut out_f16_samples_batched = vec![
-                f16::from_f32(rand::random::<f32>());
-                total_array_size
-            ];
-
-            read_and_convert_all_samples_batched(
-                &mut in_f32s_bytes.as_slice(),
-                &mut out_f16_samples_batched.iter_mut(),
-                f16::from_f32s
-            );
-
-            let out_f16_samples_naive = input_f32s.iter()
-                .cloned().map(f16::from_f32);
-
-            assert!(out_f16_samples_naive.eq(out_f16_samples_batched));
-        }
-    }
-}
-
-
-impl RecursivePixelReader for NoneMore {
-    type RecursiveChannelDescriptions = NoneMore;
-    fn get_descriptions(&self) -> Self::RecursiveChannelDescriptions { NoneMore }
-
-    type RecursivePixel = NoneMore;
-
-    fn read_pixels<'s, FullPixel>(
-        &self, _: &'s[u8], _: &mut [FullPixel],
-        _: impl Fn(&mut FullPixel) -> &mut NoneMore
-    ){}
-}
-
-impl<Sample, InnerReader: RecursivePixelReader>
-    RecursivePixelReader
-    for Recursive<InnerReader, SampleReader<Sample>>
-    where Sample: FromNativeSample + 'static
-{
-    type RecursiveChannelDescriptions = Recursive<InnerReader::RecursiveChannelDescriptions, ChannelDescription>;
-    fn get_descriptions(&self) -> Self::RecursiveChannelDescriptions { Recursive::new(self.inner.get_descriptions(), self.value.channel.clone()) }
-
-    type RecursivePixel = Recursive<InnerReader::RecursivePixel, Sample>;
-
-    fn read_pixels<'s, FullPixel>(
-        &self, bytes: &'s[u8], pixels: &mut [FullPixel],
-        get_pixel: impl Fn(&mut FullPixel) -> &mut Self::RecursivePixel
-    ) {
-        self.value.read_own_samples(bytes, pixels, |px| &mut get_pixel(px).value);
-        self.inner.read_pixels(bytes, pixels, |px| &mut get_pixel(px).inner);
-    }
-}
-
-impl<Sample, InnerReader: RecursivePixelReader>
-RecursivePixelReader
-for Recursive<InnerReader, OptionalSampleReader<Sample>>
-    where Sample: FromNativeSample + 'static
-{
-    type RecursiveChannelDescriptions = Recursive<InnerReader::RecursiveChannelDescriptions, Option<ChannelDescription>>;
-    fn get_descriptions(&self) -> Self::RecursiveChannelDescriptions { Recursive::new(
-        self.inner.get_descriptions(), self.value.reader.as_ref().map(|reader| reader.channel.clone())
-    ) }
-
-    type RecursivePixel = Recursive<InnerReader::RecursivePixel, Sample>;
-
-    fn read_pixels<'s, FullPixel>(
-        &self, bytes: &'s[u8], pixels: &mut [FullPixel],
-        get_pixel: impl Fn(&mut FullPixel) -> &mut Self::RecursivePixel
-    ) {
-        if let Some(reader) = &self.value.reader {
-            reader.read_own_samples(bytes, pixels, |px| &mut get_pixel(px).value);
-        }
-        else {
-            // if this channel is optional and was not found in the file, fill the default sample
-            for pixel in pixels.iter_mut() {
-                get_pixel(pixel).value = self.value.default_sample;
-            }
-        }
-
-        self.inner.read_pixels(bytes, pixels, |px| &mut get_pixel(px).inner);
-    }
-}
-
-