mirror of
https://github.com/storytold/lightcraft.git
synced 2026-11-11 16:31:32 -06:00
radialmonster
2dad18d2ec
The D1X/D1H raw SubIFD is 4028x1324 with XResolution 600 / YResolution 300: the pixel is twice as tall as it is wide. Nothing read that, so the picture came out about 3:1. Add a pixel aspect to RawImage/RawInfo, read it from the raw IFD resolution ratio (NEF) and from DefaultScale (DNG), accept only 1.5..4, and resample the rows after demosaic. developed_size() reports the stretched size, binning is off for non-square pixels, and the catalog and lens-profile sizing use developed_size().
106 lines
4.0 KiB
Rust
106 lines
4.0 KiB
Rust
//! Malformed-input robustness: decoding random or corrupted files must never panic.
|
||
|
||
use lightcraft_raw::{
|
||
BlackLevel, Cfa, ColorData, DngCompression, DngWriteOptions, Method, OpcodeLists, Orientation, RawData, RawFormat, RawImage, Rect,
|
||
};
|
||
use proptest::prelude::*;
|
||
|
||
fn sample(comp: DngCompression) -> Vec<u8> {
|
||
let (w, h) = (24usize, 16usize);
|
||
let data: Vec<u16> = (0..w * h).map(|i| (i * 97 % 4000) as u16).collect();
|
||
let raw = RawImage {
|
||
format: RawFormat::Dng,
|
||
width: w,
|
||
height: h,
|
||
cpp: 1,
|
||
data: RawData::U16(data),
|
||
cfa: Some(Cfa::bayer("RGGB").unwrap()),
|
||
bits: 12,
|
||
black: BlackLevel::uniform(64.0),
|
||
white: vec![4095.0],
|
||
active_area: Rect::new(0, 0, w, h),
|
||
crop: Rect::new(0, 0, w, h),
|
||
orientation: Orientation::Normal,
|
||
color: ColorData::default(),
|
||
wb_multipliers: None,
|
||
linearized: false,
|
||
pixel_aspect: 1.0,
|
||
opcodes: OpcodeLists::default(),
|
||
metadata: Default::default(),
|
||
};
|
||
lightcraft_raw::write_dng(&raw, &DngWriteOptions { compression: comp, ..Default::default() }).unwrap()
|
||
}
|
||
|
||
fn exercise(bytes: &[u8]) {
|
||
let _ = lightcraft_raw::probe(bytes);
|
||
let _ = lightcraft_raw::embedded_preview(bytes);
|
||
if let Ok(img) = lightcraft_raw::decode(bytes)
|
||
&& img.width * img.height <= 1 << 16
|
||
{
|
||
let _ = img.develop(Method::Ahd);
|
||
let xy = lightcraft_raw::color::as_shot_white_xy(&img);
|
||
let _ = lightcraft_raw::color::camera_transform(&img, xy);
|
||
}
|
||
}
|
||
|
||
proptest! {
|
||
#![proptest_config(ProptestConfig { cases: 400, .. ProptestConfig::default() })]
|
||
|
||
#[test]
|
||
fn mutated_dngs_never_panic(flips in proptest::collection::vec((any::<usize>(), any::<u8>()), 1..24), cut in any::<usize>(), lj in any::<bool>()) {
|
||
let mut data = sample(if lj { DngCompression::Lj92 { tile: 16 } } else { DngCompression::Uncompressed });
|
||
for (i, v) in flips {
|
||
let n = data.len();
|
||
data[i % n] = v;
|
||
}
|
||
let keep = if cut % 3 == 0 { cut % data.len() } else { data.len() };
|
||
exercise(&data[..keep]);
|
||
}
|
||
|
||
#[test]
|
||
fn random_tiff_like_bytes_never_panic(mut data in proptest::collection::vec(any::<u8>(), 8..700), kind in 0usize..4) {
|
||
let heads: [&[u8]; 4] = [b"II*\0\x08\0\0\0", b"MM\0*\0\0\0\x08", b"II*\0\x10\0\0\0CR\x02\0", b"II+\0\x08\0\0\0"];
|
||
let h = heads[kind];
|
||
let n = h.len().min(data.len());
|
||
data[..n].copy_from_slice(&h[..n]);
|
||
exercise(&data);
|
||
}
|
||
|
||
#[test]
|
||
fn random_lj92_never_panics(data in proptest::collection::vec(any::<u8>(), 0..400)) {
|
||
let mut s = vec![0xff, 0xd8, 0xff, 0xc3, 0, 11, 12, 0, 8, 0, 8, 1, 1, 0x11, 0];
|
||
s.extend_from_slice(&data);
|
||
let _ = lightcraft_raw::ljpeg::decode(&s, 1 << 20);
|
||
}
|
||
}
|
||
|
||
#[test]
|
||
fn truncation_at_every_length() {
|
||
for comp in [DngCompression::Uncompressed, DngCompression::Lj92 { tile: 16 }] {
|
||
let d = sample(comp);
|
||
for n in (0..d.len()).step_by(7) {
|
||
exercise(&d[..n]);
|
||
}
|
||
}
|
||
}
|
||
|
||
#[test]
|
||
fn hostile_dimensions_are_rejected_quickly() {
|
||
// a DNG claiming a 60000 × 60000 16-bit image with 10 bytes of data
|
||
use lightcraft_tiff::tags as t;
|
||
use lightcraft_tiff::{IfdBuilder, ImageData, TiffWriter, Value};
|
||
let mut ifd = IfdBuilder::new();
|
||
ifd.set(t::DNG_VERSION, Value::Byte(vec![1, 4, 0, 0]));
|
||
ifd.set(t::IMAGE_WIDTH, Value::Long(vec![60000]));
|
||
ifd.set(t::IMAGE_LENGTH, Value::Long(vec![60000]));
|
||
ifd.set(t::BITS_PER_SAMPLE, Value::Short(vec![16]));
|
||
ifd.set(t::PHOTOMETRIC, Value::Short(vec![32803]));
|
||
ifd.set(t::CFA_PATTERN_EP, Value::Byte(vec![0, 1, 1, 2]));
|
||
ifd.set(t::COMPRESSION, Value::Short(vec![7]));
|
||
ifd.set_image(ImageData::Tiles { tile_width: 60000, tile_height: 60000, tiles: vec![vec![0xff, 0xd8, 0xff, 0xd9]] });
|
||
let bytes = TiffWriter::default().write(&[ifd]).unwrap();
|
||
let t0 = std::time::Instant::now();
|
||
assert!(lightcraft_raw::decode(&bytes).is_err());
|
||
assert!(t0.elapsed().as_secs_f64() < 2.0);
|
||
}
|