1 files changed, 376 insertions, 0 deletions
diff --git a/vendor/exr/tests/roundtrip.rs b/vendor/exr/tests/roundtrip.rs
new file mode 100644
index 0000000..3181ffe
--- /dev/null
+++ b/vendor/exr/tests/roundtrip.rs
@@ -0,0 +1,376 @@
+extern crate exr;
+
+extern crate smallvec;
+
+use std::{panic};
+use std::io::{Cursor};
+use std::panic::catch_unwind;
+use std::path::{PathBuf, Path};
+use std::ffi::OsStr;
+
+use exr::prelude::*;
+use exr::error::{Error, UnitResult};
+use exr::prelude::pixel_vec::PixelVec;
+use exr::image::validate_results::ValidateResult;
+use rayon::prelude::IntoParallelIterator;
+use rayon::iter::ParallelIterator;
+use exr::block::samples::IntoNativeSample;
+
+#[test]
+fn roundtrip_all_files_in_repository_x4(){
+    check_all_files_in_repo(|path|{
+        let file = std::fs::read(path).expect("cannot open file");
+
+        round_trip_simple(&file)?;
+        round_trip_full(&file)?;
+        round_trip_rgba_file(path, &file)?;
+        round_trip_parallel_file(&file)?;
+
+        Ok(())
+    });
+}
+
+
+fn round_trip_full(file: &[u8]) -> Result<()> {
+    let read_image = read()
+        .no_deep_data().all_resolution_levels().all_channels().all_layers().all_attributes()
+        .non_parallel();
+
+    let image = read_image.clone().from_buffered(Cursor::new(file))?;
+
+    let mut tmp_bytes = Vec::with_capacity(file.len());
+    image.write().non_parallel().to_buffered(Cursor::new(&mut tmp_bytes))?;
+
+    let image2 = read_image.from_buffered(Cursor::new(tmp_bytes))?;
+
+    image.assert_equals_result(&image2);
+    Ok(())
+}
+
+fn round_trip_simple(file: &[u8]) -> Result<()> {
+    let read_image = read()
+        .no_deep_data().largest_resolution_level().all_channels().all_layers().all_attributes()
+        .non_parallel();
+
+    let image = read_image.clone().from_buffered(Cursor::new(file))?;
+
+    let mut tmp_bytes = Vec::with_capacity(file.len());
+    image.write().non_parallel().to_buffered(&mut Cursor::new(&mut tmp_bytes))?;
+
+    let image2 = read_image.from_buffered(Cursor::new(&tmp_bytes))?;
+
+    image.assert_equals_result(&image2);
+    Ok(())
+}
+
+fn round_trip_rgba_file(path: &Path, file: &[u8]) -> Result<()> {
+    // these files are known to be invalid, because they do not contain any rgb channels
+    let blacklist = [
+        Path::new("tests/images/valid/openexr/LuminanceChroma/Garden.exr"),
+        Path::new("tests/images/valid/openexr/MultiView/Fog.exr"),
+        Path::new("tests/images/valid/openexr/TestImages/GrayRampsDiagonal.exr"),
+        Path::new("tests/images/valid/openexr/TestImages/GrayRampsHorizontal.exr"),
+        Path::new("tests/images/valid/openexr/TestImages/WideFloatRange.exr"),
+        Path::new("tests/images/valid/openexr/IlmfmlmflmTest/v1.7.test.tiled.exr")
+    ];
+
+    if blacklist.contains(&path) { return Ok(()) }
+
+    let image_reader = read()
+        .no_deep_data()
+        .largest_resolution_level() // TODO all levels
+        .rgba_channels(PixelVec::<(f32,f32,f32,f32)>::constructor, PixelVec::set_pixel)
+        .first_valid_layer()
+        .all_attributes()
+        .non_parallel();
+
+    let image = image_reader.clone().from_buffered(Cursor::new(file))?;
+
+    let mut tmp_bytes = Vec::with_capacity(file.len());
+
+    image.write().non_parallel()
+        .to_buffered(&mut Cursor::new(&mut tmp_bytes))?;
+
+    let image2 = image_reader.from_buffered(Cursor::new(&tmp_bytes))?;
+
+    image.assert_equals_result(&image2);
+    Ok(())
+}
+
+// TODO compare rgba vs rgb images for color content, and rgb vs rgb(a?)
+
+
+fn round_trip_parallel_file(file: &[u8]) -> Result<()> {
+    let image = read()
+        .no_deep_data().all_resolution_levels().all_channels().all_layers().all_attributes()
+        .from_buffered(Cursor::new(file))?;
+
+    let mut tmp_bytes = Vec::with_capacity(file.len());
+    image.write().to_buffered(Cursor::new(&mut tmp_bytes))?;
+
+    let image2 = read()
+        .no_deep_data().all_resolution_levels().all_channels().all_layers().all_attributes()
+        .pedantic()
+        .from_buffered(Cursor::new(tmp_bytes.as_slice()))?;
+
+    image.assert_equals_result(&image2);
+    Ok(())
+}
+
+/// read all images in a directory.
+/// does not check any content, just checks whether a read error or panic happened.
+fn check_all_files_in_repo<T>(
+    operation: impl Sync + std::panic::RefUnwindSafe + Fn(&Path) -> exr::error::Result<T>
+) {
+    #[derive(Debug, Eq, PartialEq, Ord, PartialOrd)]
+    enum Result { Ok, Unsupported(String), Error(String) }
+
+    let files: Vec<PathBuf> = all_exr_files_in_repo().collect();
+    let mut results: Vec<(PathBuf, Result)> = files.into_par_iter()
+        .map(|file| {
+            let result = catch_unwind(||{
+                let prev_hook = panic::take_hook();
+                panic::set_hook(Box::new(|_| (/* do not println panics */)));
+                let result = operation(&file);
+                panic::set_hook(prev_hook);
+
+                result
+            });
+
+            let result = match result {
+                Ok(Ok(_)) => Result::Ok,
+                Ok(Err(Error::NotSupported(message))) => Result::Unsupported(message.to_string()),
+
+                Ok(Err(Error::Io(io))) => Result::Error(format!("IoError: {:?}", io)),
+                Ok(Err(Error::Invalid(message))) => Result::Error(format!("Invalid: {:?}", message)),
+                Ok(Err(Error::Aborted)) => panic!("a test produced `Error::Abort`"),
+
+                Err(_) => Result::Error("Panic".to_owned()),
+            };
+
+            match &result {
+                Result::Error(_) => println!("✗ Error when processing {:?}", file),
+                _ => println!("✓ No error when processing {:?}", file)
+            };
+
+            (file, result)
+        })
+        .collect();
+
+    results.sort_by(|(_, a), (_, b)| a.cmp(b));
+
+    println!("{:#?}", results.iter().map(|(path, result)| {
+        format!("{:?}: {}", result, path.to_str().unwrap())
+    }).collect::<Vec<_>>());
+
+    assert!(results.len() > 80, "Not enough files were tested!");
+
+    if let Result::Error(_) = results.last().unwrap().1 {
+        panic!("A file triggered a panic");
+    }
+}
+
+fn all_exr_files_in_repo() -> impl Iterator<Item=PathBuf> {
+    walkdir::WalkDir::new("tests/images/valid").into_iter().map(std::result::Result::unwrap)
+        .filter(|entry| entry.path().extension() == Some(OsStr::new("exr")))
+        .map(walkdir::DirEntry::into_path)
+}
+
+#[test]
+fn roundtrip_unusual_2() -> UnitResult {
+    let random_pixels: Vec<(f16, u32)> = vec![
+        ( f16::from_f32(-5.0), 4),
+        ( f16::from_f32(4.0), 9),
+        ( f16::from_f32(2.0), 6),
+        ( f16::from_f32(21.0), 8),
+        ( f16::from_f32(64.0), 7),
+    ];
+
+    let size = Vec2(3, 2);
+    let pixels = (0..size.area())
+        .zip(random_pixels.into_iter().cycle())
+        .map(|(_index, color)| color).collect::<Vec<_>>();
+
+    let pixels = PixelVec { resolution: size, pixels };
+
+    let channels = SpecificChannels::build()
+        .with_channel("N")
+        .with_channel("Ploppalori Taranos")
+        .with_pixels(pixels.clone()
+    );
+
+    let image = Image::from_channels(size, channels);
+
+    let mut tmp_bytes = Vec::new();
+    image.write().non_parallel().to_buffered(&mut Cursor::new(&mut tmp_bytes))?;
+
+    let image_reader = read()
+        .no_deep_data()
+        .largest_resolution_level() // TODO all levels
+        .specific_channels().required("N").required("Ploppalori Taranos")
+        .collect_pixels(PixelVec::<(f16,u32)>::constructor, PixelVec::set_pixel)
+        .first_valid_layer()
+        .all_attributes()
+        .non_parallel();
+
+    let image2 = image_reader.from_buffered(Cursor::new(&tmp_bytes))?;
+
+    // custom compare function: considers nan equal to nan
+    assert_eq!(image.layer_data.size, size, "test is buggy");
+    let pixels1 = &image.layer_data.channel_data.pixels;
+    let pixels2 = &image2.layer_data.channel_data.pixels;
+
+    assert_eq!(pixels1.pixels, pixels2.pixels);
+
+    Ok(())
+}
+
+// TODO test optional reader
+// TODO dedup
+#[test]
+fn roundtrip_unusual_7() -> UnitResult {
+
+    let random_pixels: Vec<(f16, u32, f32,f32,f32,f32,f32)> = vec![
+        ( f16::from_f32(-5.0), 4, 1.0,2.0,3.0,4.0,5.0),
+        ( f16::from_f32(4.0), 8, 2.0,3.0,4.0,5.0,1.0),
+        ( f16::from_f32(2.0), 9, 3.0,4.0,5.0,1.0,2.0),
+        ( f16::from_f32(21.0), 6, 4.0,5.0,1.0,2.0,3.0),
+        ( f16::from_f32(64.0), 5, 5.0,1.0,2.0,3.0,4.0),
+    ];
+
+    let size = Vec2(3, 2);
+    let pixels = (0..size.area())
+        .zip(random_pixels.into_iter().cycle())
+        .map(|(_index, color)| color).collect::<Vec<_>>();
+
+    let pixels = PixelVec { resolution: size, pixels };
+
+    let channels = SpecificChannels::build()
+        .with_channel("N")
+        .with_channel("Ploppalori Taranos")
+        .with_channel("4")
+        .with_channel(".")
+        .with_channel("____")
+        .with_channel(" ")
+        .with_channel("  ")
+        .with_pixels(pixels.clone()
+    );
+
+    let image = Image::from_channels(size, channels);
+
+    let mut tmp_bytes = Vec::new();
+    image.write().non_parallel().to_buffered(&mut Cursor::new(&mut tmp_bytes))?;
+
+    let image_reader = read()
+        .no_deep_data()
+        .largest_resolution_level() // TODO all levels
+        .specific_channels()
+            .required("N")
+            .required("Ploppalori Taranos")
+            .required("4")
+            .required(".")
+            .required("____")
+            .required(" ")
+            .required("  ")
+        .collect_pixels(PixelVec::<(f16, u32, f32,f32,f32,f32,f32)>::constructor, PixelVec::set_pixel)
+        .first_valid_layer()
+        .all_attributes()
+        .non_parallel();
+
+    let image2 = image_reader.from_buffered(Cursor::new(&tmp_bytes))?;
+
+    // custom compare function: considers nan equal to nan
+    assert_eq!(image.layer_data.size, size, "test is buggy");
+    let pixels1 = &image.layer_data.channel_data.pixels;
+    let pixels2 = &image2.layer_data.channel_data.pixels;
+
+    assert_eq!(pixels1.pixels, pixels2.pixels);
+    Ok(())
+}
+
+#[test]
+#[cfg(target_endian = "big")] // TODO big endian pxr24
+fn pxr24_expect_error_on_big_endian(){
+    let image = exr::prelude::read_all_data_from_file(
+        "tests/images/valid/custom/compression_methods/f16/pxr24.exr"
+    );
+
+    match image {
+        Err(Error::NotSupported(_)) => {}
+        _ => panic!("pxr24 should report an error on big endian architecture")
+    }
+}
+
+#[test]
+#[cfg(target_endian = "little")] // TODO big endian pxr24
+fn roundtrip_pxr24() {
+    test_mixed_roundtrip_with_compression(Compression::PXR24)
+}
+
+#[test]
+fn roundtrip_rle() {
+    test_mixed_roundtrip_with_compression(Compression::RLE)
+}
+
+#[test]
+fn roundtrip_zip1() {
+    test_mixed_roundtrip_with_compression(Compression::ZIP1)
+}
+
+#[test]
+fn roundtrip_zip16() {
+    test_mixed_roundtrip_with_compression(Compression::ZIP16)
+}
+
+#[test]
+fn roundtrip_b44() {
+    test_mixed_roundtrip_with_compression(Compression::B44)
+}
+
+#[test]
+fn roundtrip_b44a() {
+    test_mixed_roundtrip_with_compression(Compression::B44A)
+}
+
+#[test]
+fn roundtrip_piz() {
+    test_mixed_roundtrip_with_compression(Compression::PIZ)
+}
+
+#[test]
+fn roundtrip_uncompressed() {
+    test_mixed_roundtrip_with_compression(Compression::Uncompressed)
+}
+
+fn test_mixed_roundtrip_with_compression(compression: Compression) {
+
+    let original_pixels: [(f16,f32,f32); 4] = [
+        (0.0.to_f16(), -1.1, std::f32::consts::PI),
+        (9.1.to_f16(), -3.1, std::f32::consts::TAU),
+        (-10.0.to_f16(), -11.1, f32::EPSILON),
+        (half::f16::NAN, 10000.1, -1024.009),
+    ];
+
+    let mut file_bytes = Vec::new();
+    let original_image = Image::from_encoded_channels(
+        (2,2),
+        Encoding {
+            compression,
+            .. Encoding::default()
+        },
+        SpecificChannels::rgb(
+            PixelVec::new(Vec2(2,2), original_pixels.to_vec())
+        )
+    );
+
+    original_image.write().to_buffered(Cursor::new(&mut file_bytes)).unwrap();
+
+    let lossy_image = read().no_deep_data().largest_resolution_level()
+        .rgb_channels(PixelVec::<(f16,f32,f32)>::constructor, PixelVec::set_pixel)
+        .first_valid_layer().all_attributes().from_buffered(Cursor::new(&file_bytes)).unwrap();
+
+    // use automatic lossy detection by compression method
+    original_image.assert_equals_result(&original_image);
+    lossy_image.assert_equals_result(&lossy_image);
+    original_image.assert_equals_result(&lossy_image);
+}