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authorValentin Popov <valentin@popov.link>2024-01-08 00:21:28 +0300
committerValentin Popov <valentin@popov.link>2024-01-08 00:21:28 +0300
commit1b6a04ca5504955c571d1c97504fb45ea0befee4 (patch)
tree7579f518b23313e8a9748a88ab6173d5e030b227 /vendor/exr/src/image/pixel_vec.rs
parent5ecd8cf2cba827454317368b68571df0d13d7842 (diff)
downloadfparkan-1b6a04ca5504955c571d1c97504fb45ea0befee4.tar.xz
fparkan-1b6a04ca5504955c571d1c97504fb45ea0befee4.zip
Initial vendor packages
Signed-off-by: Valentin Popov <valentin@popov.link>
Diffstat (limited to 'vendor/exr/src/image/pixel_vec.rs')
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+
+//! Provides a predefined pixel storage.
+//! Currently only contains a simple flattened vector storage.
+//! Use the functions `create_pixel_vec::<YourPixelTuple>` and
+//! `set_pixel_in_vec::<YourPixelTuple>` for reading a predefined pixel vector.
+//! Use the function `PixelVec::new` to create a pixel vector which can be written to a file.
+
+use super::*;
+
+/// Store all samples in a single array.
+/// All samples will be converted to the type `T`.
+/// This supports all the sample types, `f16`, `f32`, and `u32`.
+///
+/// The flattened vector contains all rows one after another.
+/// In each row, for each pixel, its red, green, blue, and then alpha
+/// samples are stored one after another.
+///
+/// Use `PixelVec.compute_pixel_index(position)`
+/// to compute the flat index of a specific pixel.
+#[derive(Eq, PartialEq, Clone)]
+pub struct PixelVec<T> {
+
+ /// The resolution of this layer.
+ pub resolution: Vec2<usize>,
+
+ /// The flattened vector contains all rows one after another.
+ /// In each row, for each pixel, its red, green, blue, and then alpha
+ /// samples are stored one after another.
+ ///
+ /// Use `Flattened::compute_pixel_index(image, position)`
+ /// to compute the flat index of a specific pixel.
+ pub pixels: Vec<T>,
+}
+
+impl<Pixel> PixelVec<Pixel> {
+
+ /// Create a new flattened pixel storage, filled with default pixels.
+ /// Accepts a `Channels` parameter, which is not used, so that it can be passed as a function pointer instead of calling it.
+ pub fn constructor<Channels>(resolution: Vec2<usize>, _: &Channels) -> Self where Pixel: Default + Clone {
+ PixelVec { resolution, pixels: vec![Pixel::default(); resolution.area()] }
+ }
+
+ /// Examine a pixel of a `PixelVec<T>` image.
+ /// Can usually be used as a function reference instead of calling it directly.
+ #[inline]
+ pub fn get_pixel(&self, position: Vec2<usize>) -> &Pixel where Pixel: Sync {
+ &self.pixels[self.compute_pixel_index(position)]
+ }
+
+ /// Update a pixel of a `PixelVec<T>` image.
+ /// Can usually be used as a function reference instead of calling it directly.
+ #[inline]
+ pub fn set_pixel(&mut self, position: Vec2<usize>, pixel: Pixel) {
+ let index = self.compute_pixel_index(position);
+ self.pixels[index] = pixel;
+ }
+
+ /// Create a new flattened pixel storage, checking the length of the provided pixels vector.
+ pub fn new(resolution: impl Into<Vec2<usize>>, pixels: Vec<Pixel>) -> Self {
+ let size = resolution.into();
+ assert_eq!(size.area(), pixels.len(), "expected {} samples, but vector length is {}", size.area(), pixels.len());
+ Self { resolution: size, pixels }
+ }
+
+ /// Compute the flat index of a specific pixel. Returns a range of either 3 or 4 samples.
+ /// The computed index can be used with `PixelVec.samples[index]`.
+ /// Panics for invalid sample coordinates.
+ #[inline]
+ pub fn compute_pixel_index(&self, position: Vec2<usize>) -> usize {
+ position.flat_index_for_size(self.resolution)
+ }
+}
+
+use crate::image::validate_results::{ValidateResult, ValidationResult};
+
+impl<Px> ValidateResult for PixelVec<Px> where Px: ValidateResult {
+ fn validate_result(&self, other: &Self, options: ValidationOptions, location: impl Fn() -> String) -> ValidationResult {
+ if self.resolution != other.resolution { Err(location() + " > resolution") }
+ else { self.pixels.as_slice().validate_result(&other.pixels.as_slice(), options, || location() + " > pixels") }
+ }
+}
+
+impl<Px> GetPixel for PixelVec<Px> where Px: Clone + Sync {
+ type Pixel = Px;
+ fn get_pixel(&self, position: Vec2<usize>) -> Self::Pixel {
+ self.get_pixel(position).clone()
+ }
+}
+
+use std::fmt::*;
+
+impl<T> Debug for PixelVec<T> {
+ #[inline] fn fmt(&self, formatter: &mut Formatter<'_>) -> std::fmt::Result {
+ write!(formatter, "[{}; {}]", std::any::type_name::<T>(), self.pixels.len())
+ }
+}
+