mirror of
https://github.com/storytold/effectcraft.git
synced 2026-10-31 05:27:08 -06:00
aiongg
0173abde8c
* Dev profile: line tables only for workspace crates, no debug info for dependencies * xtask ci: dev-profile gate, nextest, tests without examples, wasm --keep-going * One integration-test binary per crate * xtask ci: run effectcraft-gpu's shared-device tests in one cargo test process * xtask ci: run every stage and report all failures * xtask ci: name the stage type (clippy type_complexity) * xtask ci: run every test pass and report all failures * cargo fmt
85 lines
3.6 KiB
Rust
85 lines
3.6 KiB
Rust
//! A still's Exif orientation (a camera held sideways, a mirrored scan) is applied on import: the
|
||
//! footage has the size the picture is seen at, and its frames are the picture the right way up.
|
||
|
||
use std::sync::Arc;
|
||
|
||
use effectcraft_media::{MediaPool, probe_bytes};
|
||
use effectcraft_project::FootageKind;
|
||
use effectcraft_time::Tick;
|
||
|
||
const RED: [f32; 3] = [1.0, 0.0, 0.0];
|
||
const GREEN: [f32; 3] = [0.0, 1.0, 0.0];
|
||
const BLUE: [f32; 3] = [0.0, 0.0, 1.0];
|
||
const WHITE: [f32; 3] = [1.0, 1.0, 1.0];
|
||
|
||
/// A 32×16 JPEG with red, green / blue, white quarters, tagged with Exif orientation `tag`
|
||
/// (`None`: no Exif at all).
|
||
fn quartered_jpeg(tag: Option<u8>) -> Vec<u8> {
|
||
let img = image::RgbImage::from_fn(32, 16, |x, y| {
|
||
let c = match (x < 16, y < 8) {
|
||
(true, true) => RED,
|
||
(false, true) => GREEN,
|
||
(true, false) => BLUE,
|
||
(false, false) => WHITE,
|
||
};
|
||
image::Rgb(c.map(|v| (v * 255.0) as u8))
|
||
});
|
||
let mut jpeg = Vec::new();
|
||
image::codecs::jpeg::JpegEncoder::new_with_quality(&mut jpeg, 100).encode_image(&img).expect("encode");
|
||
let Some(tag) = tag else { return jpeg };
|
||
// APP1 "Exif": a big-endian TIFF header and one IFD holding Orientation (0x0112, SHORT).
|
||
let mut app1 = vec![0xFF, 0xE1, 0x00, 0x22];
|
||
app1.extend_from_slice(b"Exif\0\0MM\0\x2A\0\0\0\x08");
|
||
app1.extend_from_slice(&[0x00, 0x01, 0x01, 0x12, 0x00, 0x03, 0x00, 0x00, 0x00, 0x01, 0x00, tag, 0x00, 0x00]);
|
||
app1.extend_from_slice(&[0x00; 4]);
|
||
// (Straight after the SOI marker.)
|
||
jpeg.splice(2..2, app1);
|
||
jpeg
|
||
}
|
||
|
||
/// The footage size and the colours of its four corners (top-left, top-right, bottom-left,
|
||
/// bottom-right), as imported.
|
||
fn imported(tag: Option<u8>) -> ((u32, u32), [[f32; 3]; 4]) {
|
||
let name = format!("oriented-{tag:?}.jpg");
|
||
let bytes: Arc<[u8]> = quartered_jpeg(tag).into();
|
||
let f = probe_bytes(&name, bytes.clone()).expect("probe");
|
||
assert_eq!(f.kind, FootageKind::Still);
|
||
let pool = MediaPool::new();
|
||
pool.add_bytes(&name, bytes);
|
||
let img = pool.frame_at(&f, Tick::ZERO).expect("frame");
|
||
assert_eq!((img.width, img.height), (f.width, f.height), "orientation {tag:?}: the frame has the probed size");
|
||
let (w, h) = (img.width as usize, img.height as usize);
|
||
let at = |x: usize, y: usize| {
|
||
let p = img.data[y * w + x];
|
||
[p[0], p[1], p[2]]
|
||
};
|
||
((f.width, f.height), [at(2, 2), at(w - 3, 2), at(2, h - 3), at(w - 3, h - 3)])
|
||
}
|
||
|
||
#[test]
|
||
fn exif_orientation_is_applied_to_stills() {
|
||
let (landscape, portrait) = ((32, 16), (16, 32));
|
||
let cases = [
|
||
(None, landscape, [RED, GREEN, BLUE, WHITE]),
|
||
(Some(1), landscape, [RED, GREEN, BLUE, WHITE]),
|
||
(Some(2), landscape, [GREEN, RED, WHITE, BLUE]),
|
||
(Some(3), landscape, [WHITE, BLUE, GREEN, RED]),
|
||
(Some(4), landscape, [BLUE, WHITE, RED, GREEN]),
|
||
(Some(5), portrait, [RED, BLUE, GREEN, WHITE]),
|
||
(Some(6), portrait, [BLUE, RED, WHITE, GREEN]),
|
||
(Some(7), portrait, [WHITE, GREEN, BLUE, RED]),
|
||
(Some(8), portrait, [GREEN, WHITE, RED, BLUE]),
|
||
// (Not an orientation: the picture as stored.)
|
||
(Some(0), landscape, [RED, GREEN, BLUE, WHITE]),
|
||
(Some(9), landscape, [RED, GREEN, BLUE, WHITE]),
|
||
];
|
||
for (tag, size, corners) in cases {
|
||
let (got_size, got) = imported(tag);
|
||
assert_eq!(got_size, size, "orientation {tag:?}: size");
|
||
for (i, (g, want)) in got.iter().zip(corners).enumerate() {
|
||
let near = g.iter().zip(want).all(|(a, b)| (a - b).abs() < 0.2);
|
||
assert!(near, "orientation {tag:?}: corner {i} is {g:?}, expected {want:?}");
|
||
}
|
||
}
|
||
}
|