Files
lightcraft/crates/engine/src/media.rs
Claude 3f63db0a0b Merge PR #279
# Conflicts:
#	README.md
#	ROADMAP.md
#	crates/catalog/src/model.rs
#	crates/engine/src/camera_preview.rs
#	crates/raw/src/lib.rs
#	crates/raw/tests/corpus.rs
#	docs/camera-preview-colour.md
#	docs/parity.md
#	docs/whats-new.md
2026-10-08 19:44:21 +00:00

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//! Source proxies and render jobs.
//!
//! Sources are decoded (or generated) once per level and cached in memory LRUs: `Thumb` (≤ 512 px
//! long edge) for the grid and filmstrip, `Preview` (≤ 2560 px) for the loupe, `Full` (native
//! resolution, the last one only) for exports larger than a preview. A [`RenderJob`] is
//! self-contained and `Send`: frontends run it on a worker thread; if the source wasn't cached yet
//! the job loads it and hands it back in the [`RenderResult`] so the cache can keep it.
//!
//! Rendered thumbnails are cached too ([`lightcraft_preview::PreviewCache`]: memory LRU, plus a
//! disk cache in the library's `thumbs/` folder), keyed by the photo's content hash, the develop
//! settings hash, the size and [`RENDER_CACHE_VERSION`] — so reopening a library shows its grid
//! without decoding a single original, and an edit simply produces a new key.
//!
//! Opening a photo shows something at once ([`QuickJob`]): the loupe's last render for the current
//! settings (kept in the same cache under a size-independent "view" key), else the camera's
//! embedded JPEG for an unedited raw, else a thumbnail-level render — while the real render is
//! prepared. Grid thumbnails of unedited raws likewise start from the embedded preview.
use std::collections::{HashMap, VecDeque};
use std::sync::{Arc, Weak};
use lightcraft_catalog::{MediaKind, Photo, PhotoId, Source};
use lightcraft_develop::DevelopSettings;
use lightcraft_pipeline::{Quality, RenderRequest, Rendered, SourceInfo, StageCache};
use lightcraft_preview::{Hash128, Hasher128, Lru, PreviewCache};
use lightcraft_raster::{Histogram, Rgb32f, Rgba8};
use serde::{Deserialize, Serialize};
const SETTINGS_HASH_ENTRIES: usize = 1024;
#[derive(Default)]
struct SettingsHashes {
entries: HashMap<PhotoId, (Weak<DevelopSettings>, u64)>,
order: VecDeque<PhotoId>,
#[cfg(test)]
computations: usize,
}
impl SettingsHashes {
fn get(&mut self, id: PhotoId, settings: &Arc<DevelopSettings>) -> u64 {
if let Some((old, hash)) = self.entries.get(&id)
&& old.as_ptr() == Arc::as_ptr(settings)
{
return *hash;
}
let hash = settings.hash64();
#[cfg(test)]
{
self.computations += 1;
}
if !self.entries.contains_key(&id) {
if self.entries.len() >= SETTINGS_HASH_ENTRIES
&& let Some(oldest) = self.order.pop_front()
{
self.entries.remove(&oldest);
}
self.order.push_back(id);
}
self.entries.insert(id, (Arc::downgrade(settings), hash));
hash
}
}
/// Bump when the pipeline's output changes, to invalidate cached thumbnails.
pub const RENDER_CACHE_VERSION: u64 = 13;
/// Thumbnails render at one of these long edges (so window/cell size changes reuse the cache).
pub const THUMB_SIZES: [usize; 4] = [128, 256, 384, 512];
pub fn thumb_bucket(long_edge: usize) -> usize {
THUMB_SIZES.iter().copied().find(|s| *s >= long_edge).unwrap_or(512)
}
/// Memory budgets.
const THUMB_SOURCE_BYTES: usize = 384 << 20;
const RENDERED_MEM_BYTES: usize = 128 << 20;
/// Disk budget for the thumbnail cache.
pub const DISK_CACHE_BYTES: u64 = 2 << 30;
#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash, Serialize, Deserialize)]
#[serde(rename_all = "lowercase")]
pub enum SourceLevel {
Thumb,
Preview,
/// The original at its native resolution (exports larger than a preview).
Full,
}
impl SourceLevel {
pub fn max_edge(self) -> usize {
match self {
SourceLevel::Thumb => 512,
SourceLevel::Preview => 2560,
SourceLevel::Full => usize::MAX,
}
}
/// Smallest level that can serve an output of `long_edge` pixels.
pub fn for_size(long_edge: usize) -> SourceLevel {
match long_edge {
0..=520 => SourceLevel::Thumb,
521..=2560 => SourceLevel::Preview,
_ => SourceLevel::Full,
}
}
}
/// Decodes a file into a linear Rec.2020 image no larger than `max_edge` (set by the app).
pub type FileLoader = Arc<dyn Fn(&str, usize) -> Result<(Rgb32f, SourceInfo), String> + Send + Sync>;
/// A raw file's embedded (camera-rendered) preview as display sRGB, oriented, no larger than
/// `max_edge` (set by the app). `None`: no usable preview.
pub type PreviewLoader = Arc<dyn Fn(&str, usize) -> Option<Rgba8> + Send + Sync>;
/// Pixels and the source interpretation learned while decoding; they must be cached together.
#[derive(Clone)]
pub struct DecodedSource {
pub image: Arc<Rgb32f>,
pub info: Option<SourceInfo>,
/// A smart preview's stored camera tone curve: the one decoder fact its pixels need that the
/// catalog's header facts lack (used when `info` is `None`).
pub camera_tone: Option<lightcraft_pipeline::tone::CameraTone>,
}
impl DecodedSource {
pub fn new(image: Arc<Rgb32f>, info: Option<SourceInfo>) -> Self {
DecodedSource { image, info, camera_tone: None }
}
/// What to render these pixels against: the decoder's facts, else `header` (the catalog's)
/// with any stored camera tone curve.
pub fn info_or(&self, header: SourceInfo) -> SourceInfo {
self.info.unwrap_or(SourceInfo { camera_tone: self.camera_tone.or(header.camera_tone), ..header })
}
}
#[derive(Clone)]
pub enum SourceRef {
Loaded(Box<DecodedSource>),
Demo {
scene: Box<lightcraft_scenes::Scene>,
max_edge: usize,
},
File {
path: String,
max_edge: usize,
loader: Option<FileLoader>,
/// The photo's smart preview, used when the original can't be read (offline drive). The
/// UI thread never checks whether the original is there; the render worker finds out.
fallback: Option<std::path::PathBuf>,
},
/// A smart preview standing in for a missing original.
Smart {
path: std::path::PathBuf,
},
}
impl SourceRef {
pub fn load(&self) -> Result<Arc<Rgb32f>, String> {
self.load_source().map(|s| s.image)
}
pub fn load_source(&self) -> Result<DecodedSource, String> {
let image = match self {
SourceRef::Loaded(a) => return Ok((**a).clone()),
SourceRef::Demo { scene, max_edge } => Arc::new(scene.render_fit(*max_edge)),
SourceRef::File { path, max_edge, loader, fallback } => {
let r = match loader {
Some(l) => l(path, *max_edge).map(|(image, info)| DecodedSource::new(Arc::new(image), Some(info))),
None => Err(format!("no decoder available for {path}")),
};
// An offline original renders from its smart preview (no decoder facts: header ones).
return match (r, fallback) {
#[cfg(not(target_arch = "wasm32"))]
(Err(e), Some(sp)) if crate::smart::is_valid(sp) => crate::smart::load(sp).map_err(|e2| format!("{e}; smart preview: {e2}")),
(r, _) => r,
};
}
#[cfg(not(target_arch = "wasm32"))]
SourceRef::Smart { path } => return crate::smart::load(path),
#[cfg(target_arch = "wasm32")]
SourceRef::Smart { .. } => return Err("smart previews are not available here".into()),
};
Ok(DecodedSource::new(image, None))
}
}
pub struct MediaCache {
settings_hashes: SettingsHashes,
/// Decoded thumbnail-level sources (LRU by bytes).
thumbs: Lru<PhotoId, DecodedSource>,
/// Decoded preview-level sources with their last use ([`lightcraft_preview::next_tick`]).
previews: Vec<(PhotoId, DecodedSource, u64)>,
/// The last full-resolution original (exports; one at a time: ~300 MB at 24 MP).
full: Option<(PhotoId, DecodedSource, u64)>,
/// How many previews to keep (LRU).
pub preview_capacity: usize,
/// Bytes all decoded sources and rendered previews in memory may take together (the cache
/// share of [`crate::memory::budget`]); the least recently used entry of any of them goes first.
budget: usize,
pub file_loader: Option<FileLoader>,
pub file_probe: Option<FileProbe>,
pub preview_loader: Option<PreviewLoader>,
/// Reads a photo file's bytes (Photo Merge); `None` = the local file system.
pub file_bytes: Option<crate::merge::ByteReader>,
/// The library's smart previews folder (originals offline: render from the proxy).
pub smart_dir: Option<std::path::PathBuf>,
/// Whether originals (and smart previews) are on disk: cached and checked off the UI thread
/// in the app (see [`crate::availability`]).
pub availability: crate::availability::Availability,
scenes: Vec<lightcraft_scenes::Scene>,
/// Rendered thumbnails (memory, plus disk once a library is attached).
pub rendered: Arc<PreviewCache>,
}
impl Default for MediaCache {
fn default() -> Self {
let budget = crate::memory::cache_share(crate::memory::budget());
MediaCache {
settings_hashes: SettingsHashes::default(),
thumbs: Lru::new(THUMB_SOURCE_BYTES.min(budget)),
previews: Vec::new(),
full: None,
preview_capacity: 0,
budget,
file_loader: None,
file_probe: None,
preview_loader: None,
file_bytes: None,
smart_dir: None,
availability: Default::default(),
scenes: Vec::new(),
rendered: Arc::new(PreviewCache::memory(rendered_budget(budget))),
}
}
}
/// Memory for rendered previews out of the cache share.
fn rendered_budget(share: usize) -> usize {
RENDERED_MEM_BYTES.min(share / 4)
}
fn source_bytes(img: &Rgb32f) -> usize {
img.data.len() * 12 + 64 + std::mem::size_of::<SourceInfo>()
}
impl MediaCache {
/// Keep rendered thumbnails on disk in `dir` as well. The cache this replaces is retired
/// (its files stay): render jobs still holding it can't write through it any more, even
/// into a directory a later clear emptied (`dir` may be the same one).
pub fn attach_disk_cache(&mut self, dir: &std::path::Path, disk_bytes: u64) {
self.rendered.retire();
self.rendered = Arc::new(PreviewCache::with_disk(rendered_budget(self.budget), dir, disk_bytes));
}
/// Change the disk budget of the cache in `dir`: in place when that cache is attached (its
/// thumbnails are keyed by content, so they and the textures shown from them stay valid,
/// and the same cache object keeps its generation), else attach it.
pub fn set_disk_cache_bytes(&mut self, dir: &std::path::Path, disk_bytes: u64) {
match self.rendered.disk().filter(|d| d.dir() == dir) {
Some(d) => d.set_budget(disk_bytes),
None => self.attach_disk_cache(dir, disk_bytes),
}
}
/// Forget every decoded source (photo ids changed meaning, e.g. another library was opened).
pub fn clear_sources(&mut self) {
self.settings_hashes = SettingsHashes::default();
self.thumbs = Lru::new(THUMB_SOURCE_BYTES.min(self.budget));
self.previews.clear();
self.full = None;
}
/// Bytes the caches may hold together.
pub fn budget(&self) -> usize {
self.budget
}
/// Change the bytes the caches may hold together, evicting at once if needed.
pub fn set_budget(&mut self, bytes: usize) {
self.budget = bytes;
self.thumbs.set_budget(THUMB_SOURCE_BYTES.min(bytes));
self.rendered.set_mem_budget(rendered_budget(bytes));
self.enforce_budget();
}
/// Bytes held by decoded sources and rendered previews in memory.
pub fn held(&self) -> usize {
let (t, p, f) = self.usage();
t.bytes + p.bytes + f.bytes + self.rendered.mem_usage().1
}
/// Evict least recently used entries across the source caches and the rendered previews
/// until they fit the budget. The newest preview-level source (the photo on screen, or the
/// one just decoded) is never evicted here.
pub fn enforce_budget(&mut self) {
let mut held = self.held();
while held > self.budget {
let newest_preview = self.previews.iter().map(|e| e.2).max();
let candidates = [
self.thumbs.oldest_tick().map(|t| (t, 0)),
self.previews.iter().filter(|e| Some(e.2) != newest_preview).map(|e| e.2).min().map(|t| (t, 1)),
self.full.as_ref().map(|e| (e.2, 2)),
self.rendered.oldest_tick().map(|t| (t, 3)),
];
let Some((tick, which)) = candidates.into_iter().flatten().min() else { break };
let freed = match which {
0 => self.thumbs.pop_oldest(),
1 => self.previews.iter().position(|e| e.2 == tick).map(|i| source_bytes(&self.previews.remove(i).1.image)),
2 => self.full.take().map(|e| source_bytes(&e.1.image)),
_ => self.rendered.evict_oldest(),
};
match freed {
Some(b) if b > 0 => held = held.saturating_sub(b),
_ => break,
}
}
}
pub fn get(&mut self, id: PhotoId, level: SourceLevel) -> Option<Arc<Rgb32f>> {
self.get_source(id, level).map(|s| s.image)
}
fn get_source(&mut self, id: PhotoId, level: SourceLevel) -> Option<DecodedSource> {
match level {
SourceLevel::Thumb => self.thumbs.get(&id).cloned(),
SourceLevel::Preview => self.previews.iter_mut().find(|e| e.0 == id).map(|e| {
e.2 = lightcraft_preview::next_tick();
e.1.clone()
}),
SourceLevel::Full => self.full.as_mut().filter(|e| e.0 == id).map(|e| {
e.2 = lightcraft_preview::next_tick();
e.1.clone()
}),
}
}
/// The facts of photo `id`'s cached sources: the decoder's when one has them, else `header`
/// (with a smart preview's stored camera tone curve).
fn source_facts(&self, id: PhotoId, header: SourceInfo) -> SourceInfo {
let cached = || {
self.thumbs
.peek(&id)
.into_iter()
.chain(self.previews.iter().filter(|e| e.0 == id).map(|e| &e.1))
.chain(self.full.iter().filter(|e| e.0 == id).map(|e| &e.1))
};
match cached().find(|s| s.info.is_some()).or_else(|| cached().next()) {
Some(s) => s.info_or(header),
None => header,
}
}
pub fn insert(&mut self, id: PhotoId, level: SourceLevel, img: Arc<Rgb32f>) {
self.insert_source(id, level, DecodedSource::new(img, None));
}
fn insert_source(&mut self, id: PhotoId, level: SourceLevel, img: DecodedSource) {
let tick = lightcraft_preview::next_tick();
match level {
SourceLevel::Thumb => {
let cost = source_bytes(&img.image);
self.thumbs.insert(id, img, cost);
}
SourceLevel::Preview => {
self.previews.retain(|e| e.0 != id);
self.previews.push((id, img, tick));
let cap = if self.preview_capacity == 0 { 4 } else { self.preview_capacity };
while self.previews.len() > cap {
let oldest = self.previews.iter().enumerate().min_by_key(|(_, e)| e.2).map(|(i, _)| i).unwrap_or(0);
self.previews.remove(oldest);
}
}
SourceLevel::Full => self.full = Some((id, img, tick)),
}
self.enforce_budget();
}
/// Forget a photo's decoded sources (e.g. after its file changed).
pub fn forget(&mut self, id: PhotoId) {
self.thumbs.remove(&id);
self.previews.retain(|e| e.0 != id);
if self.full.as_ref().is_some_and(|e| e.0 == id) {
self.full = None;
}
}
/// (decoded thumbnail sources, bytes).
pub fn source_usage(&self) -> (usize, usize) {
(self.thumbs.len(), self.thumbs.cost())
}
/// Decoded sources held: (thumbnail level, preview level, full size).
pub fn usage(&self) -> (crate::memory::Usage, crate::memory::Usage, crate::memory::Usage) {
use crate::memory::Usage;
let previews = Usage::new(self.previews.len(), self.previews.iter().map(|e| source_bytes(&e.1.image)).sum());
let full = self.full.as_ref().map(|e| Usage::new(1, source_bytes(&e.1.image))).unwrap_or_default();
(Usage::new(self.thumbs.len(), self.thumbs.cost()), previews, full)
}
pub fn source_ref(&mut self, p: &Photo, level: SourceLevel) -> SourceRef {
if let Some(a) = self.get_source(p.id, level) {
return SourceRef::Loaded(Box::new(a));
}
// Procedural scenes have a nominal size: "full" is that size, not unbounded.
let max_edge = level.max_edge().min(match (&p.source, level) {
(Source::Demo { .. }, SourceLevel::Full) => p.width.max(p.height).max(1) as usize,
_ => usize::MAX,
});
// the original is offline: its smart preview, when there is one. Only cached answers are
// used here (no file-system call on the UI thread in the app); an original not known to
// be offline is tried first and its smart preview is the render worker's fallback.
#[cfg(not(target_arch = "wasm32"))]
if let (Source::File { path }, Some(dir)) = (&p.source, &self.smart_dir) {
let sp = dir.join(crate::smart::file_name(p));
// (a proxy cut short fails to load, like the offline original; the worker's fallback
// in `SourceRef::load` only uses a proxy that passes `smart::is_valid`)
if self.availability.is_offline(path) && self.availability.exists(&sp.to_string_lossy()) == Some(true) {
return SourceRef::Smart { path: sp };
}
let mut r = self.origin_ref(&p.source, max_edge);
if let SourceRef::File { fallback, .. } = &mut r {
*fallback = Some(sp);
}
return r;
}
self.origin_ref(&p.source, max_edge)
}
/// How to load `origin` at most `max_edge` pixels long, ignoring decoded sources in memory (a
/// render worker in another wasm instance builds its sources from this).
pub fn origin_ref(&mut self, origin: &Source, max_edge: usize) -> SourceRef {
match origin {
Source::Demo { scene } => {
if self.scenes.is_empty() {
self.scenes = lightcraft_scenes::demo_library();
}
match self.scenes.iter().find(|s| s.id == *scene) {
Some(s) => SourceRef::Demo { scene: Box::new(s.clone()), max_edge },
None => SourceRef::File { path: format!("demo:{scene}"), max_edge, loader: None, fallback: None },
}
}
Source::File { path } => SourceRef::File { path: path.clone(), max_edge, loader: self.file_loader.clone(), fallback: None },
}
}
}
/// Everything needed to render one photo, detached from the session.
#[derive(Clone)]
pub struct RenderJob {
/// Assigned by a frontend to distinguish late completions, even for an identical render key.
pub request_id: u64,
pub cache_generation: u64,
/// Content identity for validating a decoded source returned after a reload.
pub source_key: Option<Hash128>,
pub photo: PhotoId,
pub level: SourceLevel,
pub source: SourceRef,
/// Where the photo's pixels come from (for executors that can't share `source`, e.g. a web
/// worker).
pub origin: Source,
pub info: SourceInfo,
pub settings: Arc<DevelopSettings>,
pub request: RenderRequest,
/// Identifies the result for caching: hash of settings + request.
pub key: u64,
/// Rendered-thumbnail cache and this job's key in it.
pub cache: Option<(Arc<PreviewCache>, Hash128)>,
/// Intermediate results of this view's previous renders (set by the frontend for the loupe):
/// slider drags then only redo the stages the changed setting feeds.
pub stages: Option<Arc<StageCache>>,
/// Keep a full-quality result here as the photo's view preview ([`crate::Session::loupe_job`]).
pub view_cache: Option<(Arc<PreviewCache>, Hash128)>,
}
pub struct RenderResult {
pub request_id: u64,
pub source_key: Option<Hash128>,
pub photo: PhotoId,
pub level: SourceLevel,
pub key: u64,
pub rendered: Result<Rendered, String>,
/// A source that was loaded by this job (to be inserted into the cache).
pub loaded: Option<DecodedSource>,
/// Set for a [`QuickJob`]'s stand-in: where the image came from.
pub quick: Option<QuickSource>,
}
impl RenderJob {
/// Render at draft quality (interactive drags). Gets its own result key.
pub fn draft(mut self) -> Self {
if self.request.quality != Quality::Draft {
self.request.quality = Quality::Draft;
self.key ^= 0x9e37_79b9_7f4a_7c15;
}
self
}
/// Draw a diagnostic overlay over the result (e.g. Point Color's visualized range). Gets its
/// own result key.
pub fn with_overlay(mut self, overlay: lightcraft_pipeline::Overlay) -> Self {
if self.request.overlay != overlay {
self.key ^= self.request.overlay.key().wrapping_mul(0x9e37_79b9_7f4a_7c15);
self.request.overlay = overlay;
self.key ^= overlay.key().wrapping_mul(0x9e37_79b9_7f4a_7c15);
}
// a diagnostic view (visualized range / spots) must never become the photo's cached preview
if overlay != lightcraft_pipeline::Overlay::None {
self.view_cache = None;
}
self
}
/// Soft-proof the result (see [`lightcraft_pipeline::Proof`]). Gets its own result key and is
/// never kept as the photo's cached preview.
pub fn with_proof(mut self, proof: Option<lightcraft_pipeline::Proof>) -> Self {
if self.request.proof != proof {
let k = |p: Option<lightcraft_pipeline::Proof>| p.map_or(0, |p| p.key()).wrapping_mul(0xc2b2_ae3d_27d4_eb4f);
self.key ^= k(self.request.proof) ^ k(proof);
self.request.proof = proof;
}
if proof.is_some() {
self.view_cache = None;
}
self
}
/// Reuse `stages` across this view's renders.
pub fn with_stages(mut self, stages: Arc<StageCache>) -> Self {
self.stages = Some(stages);
self
}
pub fn run(self) -> RenderResult {
if let Some((cache, key)) = &self.cache
&& let Some(img) = cache.get_at(self.cache_generation, *key)
{
let image = Arc::unwrap_or_clone(img);
let histogram = Histogram::of_srgb8(&image);
return RenderResult {
request_id: self.request_id,
source_key: self.source_key,
photo: self.photo,
level: self.level,
key: self.key,
rendered: Ok(Rendered { image, histogram, deep: None }),
loaded: None,
quick: None,
};
}
let was_loaded = matches!(self.source, SourceRef::Loaded(_));
match self.source.load_source() {
Ok(source) => {
let src = &source.image;
let info = source.info_or(self.info);
// Thumbnails (many small jobs side by side) stay on the CPU; views and exports use
// the GPU when there is one.
let gpu = self.cache.is_none();
let rendered = develop(src, &info, &self.settings, &self.request, self.stages.as_deref(), gpu);
if let Some((cache, key)) = &self.cache {
cache.put_at(self.cache_generation, *key, Arc::new(rendered.image.clone()));
}
if let Some((cache, key)) = &self.view_cache
&& self.request.quality == Quality::Full
{
cache.put_deferred_at(self.cache_generation, *key, Arc::new(rendered.image.clone()));
}
RenderResult {
request_id: self.request_id,
source_key: self.source_key,
photo: self.photo,
level: self.level,
key: self.key,
rendered: Ok(rendered),
loaded: (!was_loaded).then_some(source),
quick: None,
}
}
Err(e) => RenderResult {
request_id: self.request_id,
source_key: self.source_key,
photo: self.photo,
level: self.level,
key: self.key,
rendered: Err(e),
loaded: None,
quick: None,
},
}
}
}
/// Render `src`: on the GPU when `gpu` is set and a GPU is available (`lightcraft_gpu`), else on
/// the CPU, reusing `stages` either way. Both produce the same image within 1–3 LSB (see
/// `docs/gpu-pipeline.md`); `LIGHTCRAFT_GPU=0` or [`lightcraft_gpu::set_enabled`] forces the CPU.
pub fn develop(src: &Arc<Rgb32f>, info: &SourceInfo, s: &DevelopSettings, req: &RenderRequest, stages: Option<&StageCache>, gpu: bool) -> Rendered {
// LUT profiles have no GPU stage: they render on the CPU
if gpu
&& !lightcraft_pipeline::lut::is_lut_profile(&s.profile.id)
&& !s.masks.iter().any(|m| m.visible && m.refine > 0.0)
&& req.proof.is_none()
&& let Some(r) = lightcraft_gpu::render(src, info, s, req, stages)
{
return r;
}
match stages {
Some(st) => lightcraft_pipeline::render_cached(src, info, s, req, st),
None => lightcraft_pipeline::render(src, info, s, req),
}
}
/// Where a [`QuickJob`]'s stand-in image came from.
#[derive(Clone, Copy, Debug, PartialEq, Eq, Serialize, Deserialize)]
#[serde(rename_all = "camelCase")]
pub enum QuickSource {
/// The photo's own develop render for its current settings (cached view or thumbnail render).
Cached,
/// The camera's embedded JPEG (unedited raws).
Embedded,
/// A thumbnail-level develop render made for the occasion.
Small,
}
/// Something to show *now* for a photo while its real render is prepared. Tried in order: cached
/// renders, the embedded preview of an unedited raw, a thumbnail-level render.
#[derive(Clone)]
pub struct QuickJob {
pub request_id: u64,
pub photo: PhotoId,
pub key: u64,
/// Cached renders to try first, in order: (cache, key).
pub cached: Vec<(Arc<PreviewCache>, Hash128)>,
/// Embedded preview of an unedited raw: (path, loader, max edge).
pub embedded: Option<(String, PreviewLoader, usize)>,
/// Last resort: run this thumbnail job.
pub small: Option<Box<RenderJob>>,
}
impl QuickJob {
pub fn run(self) -> RenderResult {
let (photo, key) = (self.photo, self.key);
let request_id = self.request_id;
let done = |rendered: Result<Rendered, String>, quick| RenderResult {
request_id,
source_key: None,
photo,
level: SourceLevel::Thumb,
key,
rendered,
loaded: None,
quick,
};
let rendered = |image: Rgba8| {
let histogram = Histogram::of_srgb8(&image);
Ok(Rendered { image, histogram, deep: None })
};
for (cache, k) in &self.cached {
if let Some(img) = cache.get(*k) {
return done(rendered(Arc::unwrap_or_clone(img)), Some(QuickSource::Cached));
}
}
if let Some((path, loader, edge)) = &self.embedded
&& let Some(image) = loader(path, *edge)
{
return done(rendered(image), Some(QuickSource::Embedded));
}
if let Some(job) = self.small {
let r = job.run();
return RenderResult { request_id, key, quick: Some(QuickSource::Small), ..r };
}
done(Err("no quick preview".into()), None)
}
}
/// What identifies a photo's pixels for caching: its content hash, else its source.
pub fn content_key(p: &Photo) -> String {
match (&p.content_hash, &p.source) {
(Some(h), _) => h.clone(),
(None, Source::Demo { scene }) => format!("demo:{scene}"),
(None, Source::File { path }) => format!("file:{path}:{}", p.file_size),
}
}
pub fn source_info(p: &Photo) -> SourceInfo {
// Procedural demo scenes are scene-referred HDR (like raw files): use the filmic tone map.
if matches!(p.source, Source::Demo { .. }) {
return SourceInfo { raw: true, ..Default::default() };
}
// A raw shown from its embedded preview is a rendered (display-referred) JPEG: relative white
// balance and the display tone curve, like any other rendered file.
if p.develops_raw() {
let (temp, tint) = if p.relative_wb() { (6500.0, 0.0) } else { p.as_shot_wb.unwrap_or((5500.0, 0.0)) };
SourceInfo { raw: true, as_shot_temp: temp, as_shot_tint: tint, lens: p.embedded_lens, relative_wb: p.relative_wb(), ..Default::default() }
} else {
SourceInfo::default()
}
}
impl crate::Session {
/// Build a render job for `id` fitting `max_w × max_h`. `before` renders the unedited look.
pub fn render_job(&mut self, id: PhotoId, max_w: usize, max_h: usize, before: bool, apply_crop: bool) -> Option<RenderJob> {
self.build_job(id, max_w, max_h, before, apply_crop, None)
}
/// A grid/filmstrip thumbnail job: the long edge is rounded up to one of [`THUMB_SIZES`]
/// (≥ `long_edge`) and the result comes from / goes to the thumbnail cache (memory + disk).
pub fn thumb_job(&mut self, id: PhotoId, long_edge: usize) -> Option<RenderJob> {
let b = thumb_bucket(long_edge);
self.build_job(id, b, b, false, true, Some(b))
}
fn build_job(
&mut self,
id: PhotoId,
max_w: usize,
max_h: usize,
before: bool,
apply_crop: bool,
thumb_bucket: Option<usize>,
) -> Option<RenderJob> {
let p = self.catalog.photo(id)?.clone();
let level = SourceLevel::for_size(max_w.max(max_h));
let source = self.media.source_ref(&p, level);
let settings = if before { Arc::new(self.before_settings(&p)) } else { p.develop.clone() };
let request = RenderRequest { apply_crop, ..RenderRequest::fit(max_w, max_h) };
// the photo id is part of the key: two photos with the same settings and size must not
// share a result (a view slot showing photo A would otherwise look current for photo B)
// …and so is the file's content: a file changed on disk (Reload) renders afresh
let content_key = content_key(&p);
let source_key = Hasher128::new().str(&content_key).finish();
let content = source_key.0 as u64;
// Temporary "before" settings must not replace the photo's cached develop hash.
let settings_hash = if before { settings.hash64() } else { self.media.settings_hashes.get(id, &settings) };
let key = settings_hash
^ ((max_w as u64) << 40)
^ ((max_h as u64) << 20)
^ (apply_crop as u64)
^ (level as u64) << 60
^ id.0.wrapping_mul(0x9e37_79b9_7f4a_7c15)
^ content.rotate_left(17);
let cache = thumb_bucket.map(|b| {
let k = Hasher128::new()
.str(&content_key)
.u64(settings_hash)
.u64(b as u64)
.u64(RENDER_CACHE_VERSION)
.u64(crate::camera_profiles::cache_key())
.finish();
(self.media.rendered.clone(), k)
});
Some(RenderJob {
request_id: 0,
cache_generation: self.media.rendered.generation(),
source_key: Some(source_key),
photo: id,
level,
source,
origin: p.source.clone(),
info: source_info(&p),
settings,
request,
key,
cache,
stages: None,
view_cache: None,
})
}
/// A render of `id` with `settings` in place of its own, fitting `max_w × max_h` (the loupe's
/// temporary preview while hovering a preset or profile; nothing is committed or cached).
pub fn preview_job(&mut self, id: PhotoId, max_w: usize, max_h: usize, apply_crop: bool, settings: &DevelopSettings) -> Option<RenderJob> {
let mut job = self.render_job(id, max_w, max_h, false, apply_crop)?;
job.settings = Arc::new(settings.clone());
job.key = settings.hash64() ^ ((max_w as u64) << 40) ^ ((max_h as u64) << 20) ^ (apply_crop as u64) ^ (job.level as u64) << 60;
Some(job)
}
/// Cache key of a variant thumbnail ([`Self::variant_job`]).
pub fn variant_key(p: &Photo, settings: &DevelopSettings, edge: usize) -> Hash128 {
Hasher128::new()
.str(&content_key(p))
.str("variant")
.u64(settings.hash64())
.u64(edge as u64)
.u64(RENDER_CACHE_VERSION)
.u64(crate::camera_profiles::cache_key())
.finish()
}
/// A thumbnail of `id` rendered with `settings` instead of its own (profile and preset
/// browsers): from the thumbnail-level source, long edge `edge` (≤ 512), cropped. The result
/// is cached (memory + the library's disk cache) under the photo's content and the settings
/// hash, so a variant renders once; `key` is derived from the same hash, so a frontend can
/// keep one texture per variant.
pub fn variant_job(&mut self, id: PhotoId, settings: &DevelopSettings, edge: usize) -> Option<RenderJob> {
let p = self.catalog.photo(id)?.clone();
let edge = edge.clamp(16, SourceLevel::Thumb.max_edge());
let level = SourceLevel::Thumb;
let source = self.media.source_ref(&p, level);
let ck = Self::variant_key(&p, settings, edge);
Some(RenderJob {
request_id: 0,
cache_generation: self.media.rendered.generation(),
source_key: Some(Hasher128::new().str(&content_key(&p)).finish()),
photo: id,
level,
source,
origin: p.source.clone(),
info: source_info(&p),
settings: Arc::new(settings.clone()),
request: RenderRequest { apply_crop: true, ..RenderRequest::fit(edge, edge) },
key: (ck.0 as u64) ^ ((ck.0 >> 64) as u64),
cache: Some((self.media.rendered.clone(), ck)),
stages: None,
view_cache: None,
})
}
/// A square close-up of `face` (normalized, in the photo's upright frame) for a People card: the
/// photo's own look with its crop replaced by a square around the face (room for hair and chin),
/// `edge` pixels across (≤ 512). The source level is the smallest that keeps the face sharp, up
/// to the preview. Cached like [`Self::variant_job`], and `key` likewise follows the content.
pub fn face_job(&mut self, id: PhotoId, face: lightcraft_geom::Rect, edge: usize) -> Option<RenderJob> {
let p = self.catalog.photo(id)?.clone();
// `face` is on the upright (EXIF-oriented) photo; the crop below is in the frame after the
// user's Rotate Left/Right, so carry the box (and the photo's size) over to it.
let orient = p.develop.orientation;
let face = orient.map_norm_rect(face);
let (w, h) = (f64::from(p.width.max(1)), f64::from(p.height.max(1)));
let (w, h) = if orient.swaps_axes() { (h, w) } else { (w, h) };
let side = ((face.x1 - face.x0) * w).max((face.y1 - face.y0) * h) * 1.7;
// finite, within the photo, and never wider than its short side (so the clamps below are valid)
let side = if side.is_finite() { side.clamp(1.0, w.min(h)) } else { w.min(h) };
let (cx, cy) = ((face.x0 + face.x1) / 2.0 * w, (face.y0 + face.y1) / 2.0 * h);
let (cx, cy) = (if cx.is_finite() { cx } else { w / 2.0 }, if cy.is_finite() { cy } else { h / 2.0 });
let (x0, y0) = (cx.clamp(side / 2.0, w - side / 2.0) - side / 2.0, cy.clamp(side / 2.0, h - side / 2.0) - side / 2.0);
let rect = lightcraft_geom::Rect { x0: x0 / w, y0: y0 / h, x1: (x0 + side) / w, y1: (y0 + side) / h };
let mut settings = (*p.develop).clone();
settings.crop = lightcraft_develop::Crop { geometry: lightcraft_geom::CropGeometry { rect, angle: 0.0 }, ..Default::default() };
let edge = edge.clamp(16, SourceLevel::Thumb.max_edge());
// pixels along the long edge that leave `edge` across the crop
let needed = (edge as f64 * w.max(h) / side).ceil().min(SourceLevel::Preview.max_edge() as f64);
let level = SourceLevel::for_size(needed as usize);
let source = self.media.source_ref(&p, level);
let ck = Self::variant_key(&p, &settings, edge);
Some(RenderJob {
request_id: 0,
cache_generation: self.media.rendered.generation(),
source_key: Some(Hasher128::new().str(&content_key(&p)).finish()),
photo: id,
level,
source,
origin: p.source.clone(),
info: source_info(&p),
settings: Arc::new(settings),
request: RenderRequest { apply_crop: true, ..RenderRequest::fit(edge, edge) },
key: (ck.0 as u64) ^ ((ck.0 >> 64) as u64),
cache: Some((self.media.rendered.clone(), ck)),
stages: None,
view_cache: None,
})
}
/// Size-independent cache key of a photo's view render (loupe) for its current settings.
fn view_key(p: &Photo, apply_crop: bool) -> Hash128 {
Hasher128::new()
.str(&content_key(p))
.str("view")
.u64(p.develop.hash64())
.u64(apply_crop as u64)
.u64(RENDER_CACHE_VERSION)
.u64(crate::camera_profiles::cache_key())
.finish()
}
/// The loupe's render job: like [`Self::render_job`], and a full-quality result is kept as the
/// photo's view preview (memory, and disk with a library) for [`Self::quick_view_job`].
pub fn loupe_job(&mut self, id: PhotoId, max_w: usize, max_h: usize, apply_crop: bool) -> Option<RenderJob> {
let mut job = self.render_job(id, max_w, max_h, false, apply_crop)?;
let p = self.catalog.photo(id)?;
job.view_cache = Some((self.media.rendered.clone(), Self::view_key(p, apply_crop)));
Some(job)
}
/// The embedded preview of an unedited raw (path, loader), when the app installed a loader.
fn embedded_of(&self, p: &Photo) -> Option<(String, PreviewLoader)> {
match (&p.source, &self.media.preview_loader) {
(Source::File { path }, Some(l)) if p.kind == MediaKind::Raw && crate::import::has_import_look(p) => Some((path.clone(), l.clone())),
_ => None,
}
}
/// Something to show in the loupe right away for `id` (see [`QuickJob`]): its cached view
/// render, else the embedded preview of an unedited raw, else a cached or fresh thumbnail.
pub fn quick_view_job(&mut self, id: PhotoId, max_edge: usize, apply_crop: bool) -> Option<QuickJob> {
let p = self.catalog.photo(id)?.clone();
let small = self.thumb_job(id, THUMB_SIZES[THUMB_SIZES.len() - 1])?;
// (the thumbnail job itself starts with the cached thumbnail, after the sharper embedded preview)
let cached = vec![(self.media.rendered.clone(), Self::view_key(&p, apply_crop))];
let h = Hasher128::new().str(&content_key(&p)).str("quick").u64(p.develop.hash64()).u64(apply_crop as u64).finish();
let key = h.0 as u64;
let embedded = self.embedded_of(&p).map(|(path, l)| (path, l, max_edge.clamp(1, SourceLevel::Preview.max_edge())));
Some(QuickJob { request_id: 0, photo: id, key, cached, embedded, small: apply_crop.then(|| Box::new(small)) })
}
/// A first grid thumbnail for an unedited raw: the cached render for `job` (the real
/// thumbnail job, from [`Self::thumb_job`]) if there is one — then the result carries
/// [`QuickSource::Cached`] and `job.key` and is final — else its embedded preview. `None` for
/// other photos (render them directly).
pub fn quick_thumb_job(&mut self, job: &RenderJob) -> Option<QuickJob> {
let p = self.catalog.photo(job.photo)?.clone();
let (path, l) = self.embedded_of(&p)?;
let edge = job.request.max_w.max(job.request.max_h);
Some(QuickJob {
request_id: 0,
photo: job.photo,
key: job.key,
cached: job.cache.clone().into_iter().collect(),
embedded: Some((path, l, edge)),
small: None,
})
}
/// Accept a finished job's loaded source into the cache.
pub fn accept(&mut self, r: &RenderResult) {
if let Some(src) = &r.loaded
&& r.source_key.is_none_or(|key| self.catalog.photo(r.photo).is_some_and(|p| Hasher128::new().str(&content_key(p)).finish() == key))
{
self.media.insert_source(r.photo, r.level, src.clone());
}
}
/// Synchronous render (CLI, MCP, tests).
pub fn render_now(&mut self, id: PhotoId, max_w: usize, max_h: usize) -> Result<Rendered, String> {
let job = self.render_job(id, max_w, max_h, false, true).ok_or("no such photo")?;
let r = job.run();
self.accept(&r);
r.rendered
}
/// Synchronous render for export: like [`Self::render_now`], into colour space `space` with
/// sample format `depth`.
pub fn render_export(
&mut self,
id: PhotoId,
max_w: usize,
max_h: usize,
space: lightcraft_pipeline::OutputSpace,
depth: lightcraft_pipeline::OutputDepth,
) -> Result<Rendered, String> {
let r = self.export_job(id, max_w, max_h, space, depth)?.run();
self.accept(&r);
r.rendered
}
/// The job [`Self::render_export`] runs, to run elsewhere (e.g. a background export thread).
pub fn export_job(
&mut self,
id: PhotoId,
max_w: usize,
max_h: usize,
space: lightcraft_pipeline::OutputSpace,
depth: lightcraft_pipeline::OutputDepth,
) -> Result<RenderJob, String> {
let mut job = self.render_job(id, max_w, max_h, false, true).ok_or("no such photo")?;
job.request.space = space;
job.request.depth = depth;
job.key ^= (space as u64 + 1).wrapping_mul(0xa076_1d64_78bd_642f) ^ (depth as u64 + 1).wrapping_mul(0xe703_7ed1_a0b4_28db);
Ok(job)
}
/// Prefer decoder facts to header-only metadata for pixel-statistics commands.
pub fn source_info(&self, id: PhotoId) -> SourceInfo {
let header = self.catalog.photo(id).map(|p| source_info(p)).unwrap_or_default();
self.media.source_facts(id, header)
}
/// The source proxy for pixel-statistics commands (auto tone/WB), loading synchronously.
pub fn source_now(&mut self, id: PhotoId, level: SourceLevel) -> Result<Arc<Rgb32f>, String> {
let p = self.catalog.photo(id).ok_or("no such photo")?.clone();
let r = self.media.source_ref(&p, level).load_source()?;
let image = r.image.clone();
self.media.insert_source(id, level, r);
Ok(image)
}
}
/// What an import learns from a file header (set by the app from `lightcraft-codecs`/`-raw`).
#[derive(Clone, Debug, Default)]
pub struct ProbeInfo {
pub width: u32,
pub height: u32,
pub format: String,
pub kind: MediaKind,
pub file_size: u64,
pub captured: Option<String>,
pub meta: lightcraft_catalog::Meta,
pub as_shot_wb: Option<(f64, f64)>,
/// Hash of the file's bytes (hex), for duplicate detection. When it is a 32-digit
/// [`lightcraft_preview::hash_bytes`] of the whole file (as the native probe computes it),
/// Import → Copy verifies each copy against it instead of reading the source again.
pub content_hash: Option<String>,
/// Lens corrections embedded in the file (DNG opcodes).
pub embedded_lens: Option<lightcraft_develop::EmbeddedLens>,
/// The file's embedded XMP packet (raw/DNG files), for develop settings stored inside the file.
pub xmp: Option<String>,
/// A raw variant that can't be decoded yet: why. The file is described (and will be shown and
/// edited) from its embedded preview; see [`lightcraft_catalog::Photo::preview_only`].
pub preview_only: Option<String>,
}
pub type FileProbe = Arc<dyn Fn(&str) -> Result<ProbeInfo, String> + Send + Sync>;
#[cfg(test)]
mod thumbnail_hash_tests {
use super::*;
use lightcraft_catalog::Op;
fn session() -> crate::Session {
let mut s = crate::Session::new();
let p = Photo::new(PhotoId(1), Source::File { path: "hash-fixture.jpg".into() }, "fixture.jpg", "JPEG", 6000, 4000, "2026-01-01");
s.catalog.apply(Op::AddPhoto { photo: Box::new(p) }).unwrap();
s
}
#[test]
fn hashes_match_uncached_keys_and_are_not_recomputed_for_sizes_metadata_or_before() {
let mut s = session();
for edge in [256, 384, 512, 256] {
let p = s.catalog.photo(PhotoId(1)).unwrap().clone();
let b = thumb_bucket(edge);
// Independent original formula: never asks the new hash cache for expected values.
let settings = p.develop.hash64();
let content = Hasher128::new().str(&content_key(&p)).finish().0 as u64;
let expected =
settings ^ ((b as u64) << 40) ^ ((b as u64) << 20) ^ 1 ^ p.id.0.wrapping_mul(0x9e37_79b9_7f4a_7c15) ^ content.rotate_left(17);
let disk = Hasher128::new()
.str(&content_key(&p))
.u64(settings)
.u64(b as u64)
.u64(RENDER_CACHE_VERSION)
.u64(crate::camera_profiles::cache_key())
.finish();
let job = s.thumb_job(p.id, edge).unwrap();
assert_eq!(job.key, expected);
assert_eq!(job.cache.unwrap().1, disk);
}
s.catalog.apply(Op::SetRating { id: PhotoId(1), rating: 4 }).unwrap();
s.thumb_job(PhotoId(1), 256).unwrap();
s.render_job(PhotoId(1), 256, 256, true, true).unwrap();
s.thumb_job(PhotoId(1), 256).unwrap();
assert_eq!(s.media.settings_hashes.computations, 1);
let mut edit = DevelopSettings::default();
edit.light.exposure = 1.0;
let undo = s.catalog.apply(Op::SetDevelop { id: PhotoId(1), settings: Arc::new(edit), label: "edit".into(), edited: None }).unwrap();
s.thumb_job(PhotoId(1), 256).unwrap();
s.thumb_job(PhotoId(1), 384).unwrap();
assert_eq!(s.media.settings_hashes.computations, 2);
s.catalog.apply(undo).unwrap();
s.thumb_job(PhotoId(1), 256).unwrap();
assert_eq!(s.media.settings_hashes.computations, 3);
}
#[test]
fn hash_cache_is_bounded_weak_and_shared_settings_remain_independent() {
let mut hashes = SettingsHashes::default();
let shared = Arc::new(DevelopSettings::default());
for id in 1..=SETTINGS_HASH_ENTRIES as u64 * 3 {
assert_eq!(hashes.get(PhotoId(id), &shared), shared.hash64());
}
assert_eq!(hashes.entries.len(), SETTINGS_HASH_ENTRIES);
assert_eq!(hashes.order.len(), SETTINGS_HASH_ENTRIES);
assert_eq!(Arc::strong_count(&shared), 1);
let mut edit = (*shared).clone();
edit.light.exposure = 1.0;
let edit = Arc::new(edit);
let a = PhotoId(10000);
let b = PhotoId(10001);
let initial = hashes.get(a, &shared);
assert_eq!(hashes.get(b, &shared), initial);
assert_ne!(hashes.get(a, &edit), initial);
assert_eq!(hashes.get(b, &shared), initial);
let mut s = session();
s.thumb_job(PhotoId(1), 256).unwrap();
s.media.clear_sources();
assert!(s.media.settings_hashes.entries.is_empty());
assert!(s.media.settings_hashes.order.is_empty());
}
#[test]
fn source_from_before_content_reload_is_not_accepted() {
let mut s = session();
s.media.file_loader = Some(Arc::new(|_, _| Ok((Rgb32f::new(8, 8), SourceInfo::default()))));
let old = s.thumb_job(PhotoId(1), 256).unwrap().run();
assert!(old.loaded.is_some());
s.catalog
.apply(Op::SetContent {
id: PhotoId(1),
width: 6000,
height: 4000,
file_size: 99,
content_hash: Some("replacement".into()),
preview_only: None,
})
.unwrap();
s.media.forget(PhotoId(1));
s.accept(&old);
assert_eq!(s.media.source_usage().0, 0);
}
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn decoder_info_survives_render_jobs_cache_and_eviction() {
let tone = lightcraft_pipeline::tone::CameraTone::new(std::array::from_fn(|i| {
let x = 0.01 * (i + 1) as f32;
[x, (x * 2.0).min(0.9)]
}))
.unwrap();
let info = SourceInfo { raw: true, relative_wb: true, camera_tone: Some(tone), ..Default::default() };
let mut s = crate::Session::with_demo();
let id = s.active().unwrap();
let mut job = s.render_job(id, 64, 64, false, true).unwrap();
job.source = SourceRef::File {
path: "synthetic.arw".into(),
max_edge: 64,
loader: Some(Arc::new(move |_, _| {
let mut image = Rgb32f::new(64, 64);
image.data.fill([0.1; 3]);
Ok((image, info))
})),
fallback: None,
};
job.info = SourceInfo::default(); // Header facts cannot override decoder facts.
job.settings = Arc::new(DevelopSettings::default());
let r = job.clone().run();
assert_eq!(r.loaded.as_ref().unwrap().info, Some(info));
let expected = lightcraft_pipeline::render(&r.loaded.as_ref().unwrap().image, &info, &job.settings, &job.request);
assert_eq!(r.rendered.as_ref().unwrap().image.data, expected.image.data);
s.accept(&r);
job.source = s.media.source_ref(s.catalog.photo(id).unwrap(), job.level);
let again = job.run();
assert!(again.loaded.is_none());
assert_eq!(r.rendered.unwrap().image.data, again.rendered.unwrap().image.data);
s.media.forget(id);
assert!(s.media.get_source(id, r.level).is_none());
}
#[test]
fn budget_evicts_least_recently_used_across_caches() {
let img = |w: usize| Arc::new(Rgb32f::new(w, w));
let mut m = MediaCache::default();
let mb = 1 << 20;
m.set_budget(30 * mb);
// 3 previews of 12 MB (1000² × 12 B) don't fit 30 MB: the least recently used goes
m.insert(PhotoId(1), SourceLevel::Preview, img(1000));
m.insert(PhotoId(2), SourceLevel::Preview, img(1000));
assert!(m.get(PhotoId(1), SourceLevel::Preview).is_some()); // 1 is now more recent than 2
m.insert(PhotoId(3), SourceLevel::Preview, img(1000));
assert!(m.get(PhotoId(2), SourceLevel::Preview).is_none());
assert!(m.get(PhotoId(1), SourceLevel::Preview).is_some() && m.get(PhotoId(3), SourceLevel::Preview).is_some());
// a thumbnail source and a rendered preview compete in the same budget
m.insert(PhotoId(4), SourceLevel::Thumb, img(500));
m.rendered.put(Hash128(7), Arc::new(lightcraft_raster::Rgba8::new(1000, 1000)));
assert!(m.held() <= 30 * mb, "{}", m.held());
// the newest preview (the one on screen) is never evicted, even alone over budget
m.set_budget(mb);
assert!(m.get(PhotoId(3), SourceLevel::Preview).is_some());
assert_eq!(m.usage().1.count, 1);
assert_eq!(m.usage().0.count, 0);
assert_eq!(m.rendered.mem_usage().0, 0);
}
#[test]
fn work_gate_waits_for_room() {
use crate::memory::WorkGate;
let g = Arc::new(WorkGate::new(100));
let a = g.acquire(80);
// more than fits waits until `a` is released; urgent work never waits
let urgent = g.acquire_urgent(500);
assert_eq!(g.usage().0, 580);
drop(urgent);
let g2 = g.clone();
let t = std::thread::spawn(move || {
let _b = g2.acquire(50);
g2.usage().0
});
std::thread::sleep(std::time::Duration::from_millis(50));
assert_eq!(g.usage().0, 80, "the second holder is still waiting");
drop(a);
assert_eq!(t.join().unwrap(), 50);
assert_eq!(g.usage().0, 0);
// a single holder may exceed the limit
drop(g.acquire(1000));
}
#[test]
fn levels_cover_sizes_and_large_exports_use_the_original() {
assert_eq!(SourceLevel::for_size(256), SourceLevel::Thumb);
assert_eq!(SourceLevel::for_size(2560), SourceLevel::Preview);
assert_eq!(SourceLevel::for_size(2561), SourceLevel::Full);
let mut s = crate::Session::with_demo();
let p = s.catalog.photos().next().unwrap().clone();
let long = p.width.max(p.height) as usize;
assert!(long > 2560, "demo photos are camera-sized");
// a full-size export reads the source at its native size, not an upscaled preview
let job = s.render_job(p.id, long, long, false, true).unwrap();
assert_eq!(job.level, SourceLevel::Full);
match &job.source {
SourceRef::Demo { max_edge, .. } => assert_eq!(*max_edge, long),
_ => panic!("demo source expected"),
}
let loupe = s.render_job(p.id, 1600, 1600, false, true).unwrap();
assert_eq!(loupe.level, SourceLevel::Preview);
assert_ne!(loupe.key, s.render_job(p.id, 1600, 1600, false, true).unwrap().draft().key);
// two photos with identical settings and size never share a result key
let plain: Vec<_> = s.catalog.photos().filter(|p| !p.is_edited()).map(|p| p.id).take(2).collect();
let (a, b) = (s.render_job(plain[0], 1600, 1600, false, true).unwrap(), s.render_job(plain[1], 1600, 1600, false, true).unwrap());
assert_ne!(a.key, b.key);
}
#[test]
fn variant_jobs_have_their_own_keys_and_hit_the_cache() {
let mut s = crate::Session::with_demo();
let id = s.active().unwrap();
let mine = (*s.develop_of(id).unwrap()).clone();
let with = |pid: &str| {
let mut d = mine.clone();
d.profile.id = pid.into();
d
};
let (a, b) = (with("lc.vivid"), with("lc.bw.sepia"));
let ja = s.variant_job(id, &a, 128).unwrap();
let jb = s.variant_job(id, &b, 128).unwrap();
assert_ne!(ja.key, jb.key, "keys differ per settings");
assert_eq!(ja.key, s.variant_job(id, &a, 128).unwrap().key, "stable");
assert_ne!(ja.key, s.variant_job(id, &a, 256).unwrap().key, "and per size");
assert_ne!(ja.key, s.thumb_job(id, 128).unwrap().key, "not the photo's own thumbnail");
assert_eq!(ja.level, SourceLevel::Thumb);
let (cache, ck) = ja.cache.clone().unwrap();
assert!(cache.get(ck).is_none());
let r = ja.run();
s.accept(&r);
let first = r.rendered.unwrap().image;
assert!(first.width.max(first.height) <= 128);
assert!(cache.get(ck).is_some(), "rendered variants are cached");
assert!(cache.get(jb.cache.as_ref().unwrap().1).is_none());
// a second job for the same variant is served from the cache, pixel for pixel
let again = s.variant_job(id, &a, 128).unwrap().run();
assert!(again.loaded.is_none());
assert_eq!(again.rendered.unwrap().image.as_bytes(), first.as_bytes());
let other = jb.run().rendered.unwrap().image;
assert_ne!(other.as_bytes(), first.as_bytes());
// the photo's own settings never changed
assert_eq!(*s.develop_of(id).unwrap(), mine);
// hover previews: a loupe-sized job with other settings, its own key
let pv = s.preview_job(id, 800, 600, true, &a).unwrap();
assert_ne!(pv.key, s.render_job(id, 800, 600, false, true).unwrap().key);
assert_eq!(*pv.settings, a);
}
}