mirror of
https://github.com/storytold/designcraft.git
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464a442802
- An RGB image with no ICC profile of its own was written as DeviceRGB under the CMYK output intent, and the export only warned. In PDF/X-4 it now carries the sRGB profile (assets/icc/sRGB-v2-magic.icc, ICC v2.1, CC0). JPEGs stay passed through. Untagged PNG, GIF and WebP, and the decoded TIFF, BMP and PSD fallback, go in as RGB with the profile. A re-encoded JPEG keeps the source's RGB profile or gets sRGB. Grey images and images with their own profile are unchanged. - Every image constructor asked for interpolation. PDF/X-4 and PDF/A exports now write images without it, which also removes the ImageInterpolation error that stopped PDF/A exports with a placed image. Plain exports keep it. - make_pdfx4 writes pdf:Trapped False into the XMP, matching /Trapped/False in the document information. - check_pdfx4 reports an image that asks for interpolation. Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com> Co-authored-by: Brandon Thomas <echelon@gmail.com>
1482 lines
62 KiB
Rust
1482 lines
62 KiB
Rust
//! Document → PDF. The item walk mirrors `designcraft-render`'s `draw_spread` / `draw_item`.
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use std::collections::HashMap;
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use std::sync::Arc;
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use designcraft_color::swatch::{ColorType, SwatchValue};
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use designcraft_color::{BlendMode as DcBlend, Color, GradientKind};
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use designcraft_compose::Cache;
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use designcraft_doc::{AssetId, Content, Document, Item, PageSide, Spread, StrokeAlign, StrokeType};
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use designcraft_geom::kurbo::{PathEl, Shape as _};
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use designcraft_geom::{Affine, BezPath, Rect, Vec2, corners};
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use krilla::color::{cmyk, luma, rgb};
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use krilla::configure::{Archival, ConfigurationBuilder, PdfVersion};
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use krilla::geom::{Path, PathBuilder, Size, Transform};
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use krilla::image::Image;
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use krilla::metadata::Metadata;
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use krilla::num::NormalizedF32;
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use krilla::page::PageSettings;
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use krilla::paint::{Fill, FillRule, LinearGradient, RadialGradient, SpreadMethod, Stop, Stroke, StrokeDash};
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use krilla::surface::Surface;
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use krilla::tagging::{Artifact, ArtifactType, ContentTag, Identifier, Tag, TagGroup, TagTree};
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use crate::{ExportReport, PdfError, PdfOptions, Result, Standard};
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/// Export `doc` as PDF bytes.
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pub fn export_pdf(doc: &Document, cache: &Cache, opts: &PdfOptions) -> Result<Vec<u8>> {
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export_pdf_with_report(doc, cache, opts).map(|r| r.bytes)
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}
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/// One output page: a document page or a spread, in spread coordinates.
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pub(crate) struct Sheet {
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pub spread: usize,
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pub trim: Rect,
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pub bleed: Rect,
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pub media: Rect,
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/// Page name(s) for the page-information mark.
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pub label: String,
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}
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pub(crate) const MARK_LEN: f64 = 18.0;
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fn bleed_lr(side: PageSide, b: [f64; 4]) -> (f64, f64) {
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// Bleed is top, bottom, inside, outside; single-sided pages read inside as left.
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if side == PageSide::Left { (b[3], b[2]) } else { (b[2], b[3]) }
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}
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/// The spread each exported PDF page shows (in page order).
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pub fn sheet_spreads(doc: &Document, opts: &PdfOptions) -> Vec<usize> {
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sheets(doc, opts).map(|v| v.iter().map(|s| s.spread).collect()).unwrap_or_default()
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}
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fn sheets(doc: &Document, opts: &PdfOptions) -> Result<Vec<Sheet>> {
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let count = doc.page_count();
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let pages: Vec<usize> = match &opts.pages {
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Some(v) => v.clone(),
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None => (0..count).collect(),
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};
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if pages.is_empty() {
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return Err(PdfError::NoPages);
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}
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if let Some(bad) = pages.iter().find(|p| **p >= count) {
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return Err(PdfError::BadPage(bad + 1));
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}
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let b = doc.settings.bleed.map(|v| if opts.bleed { v.max(0.0) } else { 0.0 });
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let mut out: Vec<Sheet> = Vec::new();
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let mut seen_spreads: Vec<usize> = Vec::new();
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for abs in pages {
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let (si, pi) = doc.page_loc(abs).ok_or(PdfError::BadPage(abs + 1))?;
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let sp: &Spread = &doc.spreads[si];
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let (trim, l, r, label) = if opts.spreads {
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if seen_spreads.contains(&si) {
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continue;
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}
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seen_spreads.push(si);
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let first = doc.first_page_of_spread(si);
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let (l, _) = sp.pages.first().map(|p| bleed_lr(p.side, b)).unwrap_or((b[2], b[3]));
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let (_, r) = sp.pages.last().map(|p| bleed_lr(p.side, b)).unwrap_or((b[2], b[3]));
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let names: Vec<String> = (0..sp.pages.len()).map(|i| doc.page_name(first + i)).collect();
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(sp.bounds(), l, r, names.join("–"))
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} else {
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let p = &sp.pages[pi];
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let (l, r) = bleed_lr(p.side, b);
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(p.bounds(), l, r, doc.page_name(abs))
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};
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let bleed = Rect::new(trim.x0 - l, trim.y0 - b[0], trim.x1 + r, trim.y1 + b[1]);
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let media = if opts.marks.any() {
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let m = mark_start(opts, b) + MARK_LEN + 6.0;
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trim.inflate(m, m)
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} else {
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bleed
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};
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out.push(Sheet { spread: si, trim, bleed, media, label });
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}
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Ok(out)
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}
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/// Distance from the trim edge where marks start: the offset, but never inside the bleed.
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pub(crate) fn mark_start(opts: &PdfOptions, bleed: [f64; 4]) -> f64 {
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bleed.iter().copied().fold(opts.marks.offset.max(0.0), f64::max)
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}
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/// Like [`export_pdf`], also returning warnings about approximated or dropped features.
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pub fn export_pdf_with_report(doc: &Document, cache: &Cache, opts: &PdfOptions) -> Result<ExportReport> {
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let sheets = sheets(doc, opts)?;
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let warnings = Vec::new();
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let (version, archival) = match opts.standard {
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Standard::None => (PdfVersion::Pdf17, None),
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Standard::PdfX4 => (PdfVersion::Pdf16, None),
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Standard::PdfA2b => (PdfVersion::Pdf17, Some(Archival::A2_B)),
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};
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let mut cb = ConfigurationBuilder::new().with_version(version);
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if let Some(a) = archival {
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cb = cb.with_archival_validator(a);
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}
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let configuration = cb.finish().map_err(|e| PdfError::Write(format!("{e:?}")))?;
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let settings = krilla::SerializeSettings { compress_content_streams: opts.compress, configuration, ..Default::default() };
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let mut pdf = krilla::Document::new_with(settings);
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let title = opts.title.clone().unwrap_or_else(|| doc.title.clone());
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let mut meta = Metadata::new().creator("DesignCraft".into()).producer("DesignCraft".into());
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if !title.is_empty() {
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meta = meta.title(title.clone());
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}
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if let Some(a) = &opts.author {
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meta = meta.authors(vec![a.clone()]);
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}
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let created = opts.created.or_else(now_unix);
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if let Some(t) = created {
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let c = civil(t);
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meta = meta.creation_date(
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krilla::metadata::DateTime::new(c.0.clamp(0, 9999) as u16)
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.month(c.1)
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.day(c.2)
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.hour(c.3)
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.minute(c.4)
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.second(c.5)
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.utc_offset_hour(0)
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.utc_offset_minute(0),
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);
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}
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pdf.set_metadata(meta);
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let mut ex = Exporter {
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doc,
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cache,
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opts,
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clip: Rect::ZERO,
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warnings,
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images: HashMap::new(),
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pdfs: HashMap::new(),
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version,
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too_new: Vec::new(),
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svgs: HashMap::new(),
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fonts: HashMap::new(),
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reverse_cmaps: HashMap::new(),
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rgb_only: archival.is_some(),
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interpolate: archival.is_none(),
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tags: Vec::new(),
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story_tags: HashMap::new(),
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tag_story: None,
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para_tags: HashMap::new(),
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};
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if ex.rgb_only {
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ex.warn("PDF/A: CMYK colours were converted to RGB (no CMYK output intent profile is available yet)");
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}
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if let Some(o) = crate::links::outline(doc, &sheets) {
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pdf.set_outline(o);
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}
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for (sheet_idx, sh) in sheets.iter().enumerate() {
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let size = Size::from_wh(sh.media.width().max(1.0) as f32, sh.media.height().max(1.0) as f32).ok_or(PdfError::NoPages)?;
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let local = |r: Rect| {
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krilla::geom::Rect::from_ltrb(
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(r.x0 - sh.media.x0) as f32,
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(r.y0 - sh.media.y0) as f32,
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(r.x1 - sh.media.x0) as f32,
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(r.y1 - sh.media.y0) as f32,
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)
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};
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let settings = PageSettings::new(size).with_trim_box(local(sh.trim)).with_bleed_box(local(sh.bleed));
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let mut page = pdf.start_page_with(settings);
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let mut s = page.surface();
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s.push_transform(&tf(Affine::translate(-sh.media.origin().to_vec2())));
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ex.clip = sh.bleed;
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if let Some(clip) = to_path(&sh.bleed.to_path(0.1)) {
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s.push_clip_path(&clip, &FillRule::NonZero);
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ex.spread(&mut s, sh.spread);
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s.pop();
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}
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if opts.tagged {
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s.start_tagged(ContentTag::Artifact(Artifact::new(ArtifactType::Page, None)));
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}
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ex.marks(&mut s, sh, &title, created);
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if opts.tagged {
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s.end_tagged();
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}
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s.pop();
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s.finish();
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for a in crate::links::annotations(doc, cache, &sheets, sheet_idx) {
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page.add_annotation(a);
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}
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page.finish();
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}
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if opts.tagged {
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pdf.set_tag_tree(ex.tag_tree());
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}
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ex.check_placed_versions()?;
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let mut bytes = pdf.finish().map_err(|e| PdfError::Write(format!("{e:?}")))?;
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// Transparency blends in the document's blend space: CMYK for print (and always in PDF/X).
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let mut warnings = ex.warnings;
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if !ex.rgb_only && (doc.settings.blend_space == designcraft_doc::BlendSpace::Cmyk || opts.standard == Standard::PdfX4) {
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// The rewrite matches krilla's exact output; in PDF/X-4, `check_pdfx4` reports any
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// group that got past it, with its page.
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crate::pdfx::cmyk_group_spaces(&mut bytes);
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}
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// Form fields (Buttons and Forms) and, for interactive PDF, video and sound; not in PDF/X.
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let fields = crate::forms::collect(doc, &sheets);
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let media = if opts.media { crate::forms::collect_media(doc, &sheets) } else { Vec::new() };
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if !fields.is_empty() || !media.is_empty() {
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if opts.standard == Standard::PdfX4 {
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warnings.push("PDF/X-4: form fields and media were left out".into());
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} else {
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match crate::forms::add_fields(&bytes, &fields, &media) {
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Some(b) => bytes = b,
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None => warnings.push("form fields and media couldn't be added to this PDF".into()),
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}
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}
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}
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if opts.standard == Standard::PdfX4 {
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// Output intent and PDF/X identification, then check the result.
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match crate::pdfx::make_pdfx4(&bytes, &title) {
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Some(b) => bytes = b,
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None => warnings.push("PDF/X-4: the output intent couldn't be added".into()),
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}
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for issue in crate::pdfx::check_pdfx4(&bytes) {
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warnings.push(format!("PDF/X-4: {issue}"));
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}
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}
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warnings.dedup();
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Ok(ExportReport { bytes, pages: sheets.len(), warnings })
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}
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/// One PDF from several (a book's documents), every page carried over as vectors; each part
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/// comes with its pages' sizes (points).
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pub fn merge_pdfs(parts: &[(Vec<u8>, Vec<(f32, f32)>)], title: Option<&str>) -> Result<Vec<u8>> {
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let mut pdf = krilla::Document::new_with(krilla::SerializeSettings::default());
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let mut meta = Metadata::new().creator("DesignCraft".into()).producer("DesignCraft".into());
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if let Some(t) = title {
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meta = meta.title(t.to_string());
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}
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pdf.set_metadata(meta);
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let mut pages = 0;
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for (bytes, sizes) in parts {
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let src = krilla::pdf::Pdf::new(Arc::new(bytes.clone())).map_err(|e| PdfError::Write(format!("{e:?}")))?;
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let doc = krilla::pdf::PdfDocument::new(Arc::new(src));
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for (i, &(w, h)) in sizes.iter().enumerate() {
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let size = Size::from_wh(w.max(1.0), h.max(1.0)).ok_or(PdfError::NoPages)?;
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let mut page = pdf.start_page_with(PageSettings::new(size));
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let mut s = page.surface();
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s.draw_pdf_page(&doc, size, i);
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s.finish();
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page.finish();
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pages += 1;
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}
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}
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if pages == 0 {
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return Err(PdfError::NoPages);
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}
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pdf.finish().map_err(|e| PdfError::Write(format!("{e:?}")))
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}
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/// File › Print Booklet: how pages pair up on printer spreads.
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#[derive(Clone, Copy, Debug, Default, PartialEq, Eq)]
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pub enum BookletKind {
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/// Folded and stapled: pages padded to a multiple of 4, outer pages together.
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#[default]
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SaddleStitch,
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/// Two pages side by side in reading order.
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TwoUpConsecutive,
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}
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#[derive(Clone, Debug, Default)]
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pub struct BookletOptions {
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pub kind: BookletKind,
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/// Gap between the two pages of a printer spread (points).
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pub space_between: f64,
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pub title: Option<String>,
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}
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/// The printer spreads for `n` pages: (left, right) absolute page indices, `None` = blank.
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pub fn booklet_pairs(n: usize, kind: BookletKind) -> Vec<(Option<usize>, Option<usize>)> {
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let page = |i: usize| (i < n).then_some(i);
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match kind {
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BookletKind::TwoUpConsecutive => (0..n.div_ceil(2)).map(|k| (page(2 * k), page(2 * k + 1))).collect(),
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BookletKind::SaddleStitch => {
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let m = n.div_ceil(4).max(1) * 4;
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(0..m / 2).map(|i| if i % 2 == 0 { (page(m - 1 - i), page(i)) } else { (page(i), page(m - 1 - i)) }).collect()
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}
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}
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}
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/// An imposed PDF: two document pages per sheet, in booklet order.
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pub fn export_booklet(doc: &Document, cache: &Cache, opts: &BookletOptions) -> Result<ExportReport> {
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let n = doc.page_count();
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if n == 0 {
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return Err(PdfError::NoPages);
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}
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let pdf_opts = PdfOptions { title: opts.title.clone(), ..PdfOptions::default() };
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let settings = krilla::SerializeSettings { compress_content_streams: true, ..Default::default() };
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let mut pdf = krilla::Document::new_with(settings);
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let title = opts.title.clone().unwrap_or_else(|| doc.title.clone());
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let mut meta = Metadata::new().creator("DesignCraft".into()).producer("DesignCraft".into());
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if !title.is_empty() {
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meta = meta.title(title);
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}
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pdf.set_metadata(meta);
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let mut ex = Exporter {
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doc,
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cache,
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opts: &pdf_opts,
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clip: Rect::ZERO,
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warnings: Vec::new(),
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images: HashMap::new(),
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pdfs: HashMap::new(),
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// krilla's default.
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version: PdfVersion::Pdf17,
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too_new: Vec::new(),
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svgs: HashMap::new(),
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fonts: HashMap::new(),
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reverse_cmaps: HashMap::new(),
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rgb_only: false,
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interpolate: true,
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tags: Vec::new(),
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story_tags: HashMap::new(),
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tag_story: None,
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para_tags: HashMap::new(),
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};
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let pairs = booklet_pairs(n, opts.kind);
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// Sheet size from the largest page.
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let (mut pw, mut ph) = (0.0f64, 0.0f64);
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for i in 0..n {
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if let Some((si, pi)) = doc.page_loc(i) {
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let p = &doc.spreads[si].pages[pi];
|
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pw = pw.max(p.width);
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ph = ph.max(p.height);
|
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}
|
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}
|
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let gap = opts.space_between.max(0.0);
|
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let size = Size::from_wh((2.0 * pw + gap) as f32, ph as f32).ok_or(PdfError::NoPages)?;
|
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for (left, right) in &pairs {
|
||
let mut page = pdf.start_page_with(PageSettings::new(size));
|
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let mut s = page.surface();
|
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for (slot, abs) in [(0.0, left), (pw + gap, right)] {
|
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let Some((si, pi)) = abs.and_then(|a| doc.page_loc(a)) else { continue };
|
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let p = &doc.spreads[si].pages[pi];
|
||
let r = Rect::new(p.x, 0.0, p.x + p.width, p.height);
|
||
// Pages narrower than the slot sit against the fold.
|
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let dx = if slot == 0.0 { pw - p.width } else { 0.0 };
|
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s.push_transform(&tf(Affine::translate((slot + dx - p.x, (ph - p.height) / 2.0))));
|
||
ex.clip = r;
|
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if let Some(clip) = to_path(&r.to_path(0.1)) {
|
||
s.push_clip_path(&clip, &FillRule::NonZero);
|
||
ex.spread(&mut s, si);
|
||
s.pop();
|
||
}
|
||
s.pop();
|
||
}
|
||
s.finish();
|
||
page.finish();
|
||
}
|
||
ex.check_placed_versions()?;
|
||
let mut bytes = pdf.finish().map_err(|e| PdfError::Write(format!("{e:?}")))?;
|
||
if doc.settings.blend_space == designcraft_doc::BlendSpace::Cmyk {
|
||
crate::pdfx::cmyk_group_spaces(&mut bytes);
|
||
}
|
||
let mut warnings = ex.warnings;
|
||
warnings.dedup();
|
||
Ok(ExportReport { bytes, pages: pairs.len(), warnings })
|
||
}
|
||
|
||
#[cfg(not(target_arch = "wasm32"))]
|
||
fn now_unix() -> Option<i64> {
|
||
use std::time::{SystemTime, UNIX_EPOCH};
|
||
SystemTime::now().duration_since(UNIX_EPOCH).ok().map(|d| d.as_secs() as i64)
|
||
}
|
||
#[cfg(target_arch = "wasm32")]
|
||
fn now_unix() -> Option<i64> {
|
||
None
|
||
}
|
||
|
||
/// Unix seconds (UTC) → (year, month, day, hour, minute, second), proleptic Gregorian.
|
||
pub(crate) fn civil(t: i64) -> (i64, u8, u8, u8, u8, u8) {
|
||
let days = t.div_euclid(86_400);
|
||
let secs = t.rem_euclid(86_400);
|
||
let z = days + 719_468;
|
||
let era = z.div_euclid(146_097);
|
||
let doe = z - era * 146_097;
|
||
let yoe = (doe - doe / 1460 + doe / 36_524 - doe / 146_096) / 365;
|
||
let doy = doe - (365 * yoe + yoe / 4 - yoe / 100);
|
||
let mp = (5 * doy + 2) / 153;
|
||
let day = doy - (153 * mp + 2) / 5 + 1;
|
||
let month = if mp < 10 { mp + 3 } else { mp - 9 };
|
||
let year = yoe + era * 400 + i64::from(month <= 2);
|
||
(year, month as u8, day as u8, (secs / 3600) as u8, (secs / 60 % 60) as u8, (secs % 60) as u8)
|
||
}
|
||
|
||
pub(crate) struct Exporter<'a> {
|
||
pub doc: &'a Document,
|
||
pub cache: &'a Cache,
|
||
pub opts: &'a PdfOptions,
|
||
/// Current sheet's visible area (spread space) for culling.
|
||
pub clip: Rect,
|
||
pub warnings: Vec<String>,
|
||
images: HashMap<AssetId, Option<Image>>,
|
||
/// Placed PDFs (embedded as vector pages).
|
||
pdfs: HashMap<AssetId, Option<krilla::pdf::PdfDocument>>,
|
||
/// The PDF version written; placed PDFs must not be newer.
|
||
version: PdfVersion,
|
||
/// Placed PDFs too new to embed in this version ("name is PDF 2.0"): the export fails.
|
||
too_new: Vec<String>,
|
||
/// Parsed placed SVGs.
|
||
svgs: HashMap<AssetId, Option<Arc<designcraft_images::usvg::Tree>>>,
|
||
pub fonts: HashMap<u32, Option<krilla::text::Font>>,
|
||
pub reverse_cmaps: HashMap<u32, Arc<HashMap<u32, char>>>,
|
||
/// Convert CMYK to RGB (PDF/A: krilla needs a CMYK output profile we don't ship yet).
|
||
pub rgb_only: bool,
|
||
/// Ask viewers to smooth upscaled images (`/Interpolate`). Off for PDF/A, which forbids it.
|
||
interpolate: bool,
|
||
/// Tagged PDF: the structure in reading order (stories gather their frames' content).
|
||
tags: Vec<TagEntry>,
|
||
story_tags: HashMap<designcraft_doc::StoryId, Vec<Identifier>>,
|
||
/// While drawing a story's frame for the structure tree: the story (text runs are tagged
|
||
/// per paragraph, everything else in the frame is an artifact).
|
||
pub(crate) tag_story: Option<designcraft_doc::StoryId>,
|
||
/// Marked content of each (story, paragraph index).
|
||
pub(crate) para_tags: HashMap<(designcraft_doc::StoryId, usize), Vec<Identifier>>,
|
||
}
|
||
|
||
enum TagEntry {
|
||
Story(designcraft_doc::StoryId),
|
||
Figure(TagGroup),
|
||
}
|
||
|
||
pub(crate) fn tf(a: Affine) -> Transform {
|
||
let c = a.as_coeffs();
|
||
Transform::from_row(c[0] as f32, c[1] as f32, c[2] as f32, c[3] as f32, c[4] as f32, c[5] as f32)
|
||
}
|
||
|
||
pub(crate) fn to_path(bp: &BezPath) -> Option<Path> {
|
||
let mut pb = PathBuilder::new();
|
||
for el in bp.elements() {
|
||
match *el {
|
||
PathEl::MoveTo(p) => pb.move_to(p.x as f32, p.y as f32),
|
||
PathEl::LineTo(p) => pb.line_to(p.x as f32, p.y as f32),
|
||
PathEl::QuadTo(a, p) => pb.quad_to(a.x as f32, a.y as f32, p.x as f32, p.y as f32),
|
||
PathEl::CurveTo(a, b, p) => pb.cubic_to(a.x as f32, a.y as f32, b.x as f32, b.y as f32, p.x as f32, p.y as f32),
|
||
PathEl::ClosePath => pb.close(),
|
||
}
|
||
}
|
||
pb.finish()
|
||
}
|
||
|
||
pub(crate) fn norm(v: f32) -> NormalizedF32 {
|
||
NormalizedF32::new(if v.is_finite() { v.clamp(0.0, 1.0) } else { 1.0 }).unwrap_or(NormalizedF32::ONE)
|
||
}
|
||
|
||
fn q(v: f32) -> u8 {
|
||
(v.clamp(0.0, 1.0) * 255.0).round() as u8
|
||
}
|
||
|
||
fn regular(c: &Color, rgb_only: bool) -> krilla::color::RegularColor {
|
||
use krilla::color::RegularColor as R;
|
||
if rgb_only && matches!(c, Color::Cmyk { .. }) {
|
||
let [r, g, b] = c.to_rgb();
|
||
return R::Rgb(rgb::Color::new(q(r), q(g), q(b)));
|
||
}
|
||
match *c {
|
||
Color::Rgb { r, g, b } => R::Rgb(rgb::Color::new(q(r), q(g), q(b))),
|
||
Color::Cmyk { c, m, y, k } => R::Cmyk(cmyk::Color::new(q(c), q(m), q(y), q(k))),
|
||
// DesignCraft grey is ink coverage (0 = white); PDF DeviceGray is lightness.
|
||
Color::Gray { k } => R::Luma(luma::Color::new(q(1.0 - k))),
|
||
}
|
||
}
|
||
|
||
/// A process colour in its own device space (CMYK → DeviceCMYK, RGB → DeviceRGB, Gray → DeviceGray).
|
||
/// `rgb_only` converts CMYK to RGB (PDF/A without a CMYK output profile).
|
||
pub(crate) fn device(c: &Color, rgb_only: bool) -> krilla::color::Color {
|
||
match regular(c, rgb_only) {
|
||
krilla::color::RegularColor::Rgb(v) => v.into(),
|
||
krilla::color::RegularColor::Cmyk(v) => v.into(),
|
||
krilla::color::RegularColor::Luma(v) => v.into(),
|
||
}
|
||
}
|
||
|
||
/// `[Registration]` prints on every plate: `/Separation /All`.
|
||
pub(crate) fn registration(tint: f32, rgb_only: bool) -> krilla::color::Color {
|
||
use krilla::color::separation::{Color as SepColor, SeparationColorant, SeparationSpace};
|
||
let alt = regular(&Color::cmyk(1.0, 1.0, 1.0, 1.0), rgb_only);
|
||
SepColor::new(q(tint), SeparationSpace::new(SeparationColorant::AllColorants, alt)).into()
|
||
}
|
||
|
||
fn blend(b: DcBlend) -> krilla::blend::BlendMode {
|
||
use krilla::blend::BlendMode as K;
|
||
match b {
|
||
DcBlend::Normal => K::Normal,
|
||
DcBlend::Darken => K::Darken,
|
||
DcBlend::Multiply => K::Multiply,
|
||
DcBlend::ColorBurn => K::ColorBurn,
|
||
DcBlend::Lighten => K::Lighten,
|
||
DcBlend::Screen => K::Screen,
|
||
DcBlend::ColorDodge => K::ColorDodge,
|
||
DcBlend::Overlay => K::Overlay,
|
||
DcBlend::SoftLight => K::SoftLight,
|
||
DcBlend::HardLight => K::HardLight,
|
||
DcBlend::Difference => K::Difference,
|
||
DcBlend::Exclusion => K::Exclusion,
|
||
DcBlend::Hue => K::Hue,
|
||
DcBlend::Saturation => K::Saturation,
|
||
DcBlend::Color => K::Color,
|
||
DcBlend::Luminosity => K::Luminosity,
|
||
}
|
||
}
|
||
|
||
fn rects_overlap(a: Rect, b: Rect) -> bool {
|
||
a.x0 <= b.x1 && b.x0 <= a.x1 && a.y0 <= b.y1 && b.y0 <= a.y1
|
||
}
|
||
|
||
pub(crate) fn solid_fill(c: krilla::color::Color, opacity: f32) -> Fill {
|
||
Fill { paint: c.into(), opacity: norm(opacity), rule: FillRule::NonZero }
|
||
}
|
||
|
||
impl Exporter<'_> {
|
||
/// A print document, or a PDF/X file (whose output intent is CMYK).
|
||
pub(crate) fn for_print(&self) -> bool {
|
||
self.doc.settings.intent == designcraft_doc::Intent::Print || self.opts.standard == Standard::PdfX4
|
||
}
|
||
|
||
pub(crate) fn warn(&mut self, w: impl Into<String>) {
|
||
let w = w.into();
|
||
if !self.warnings.contains(&w) {
|
||
self.warnings.push(w);
|
||
}
|
||
}
|
||
|
||
/// A swatch + tint as a PDF colour: spot swatches (and tints of them) become `/Separation`
|
||
/// with the swatch's values as the alternate space; process colours stay in their device space.
|
||
pub(crate) fn swatch_color(&self, name: &str, tint: f32) -> Option<krilla::color::Color> {
|
||
use krilla::color::separation::{Color as SepColor, SeparationColorant, SeparationSpace};
|
||
let mut n = name;
|
||
let mut t = tint;
|
||
for _ in 0..8 {
|
||
let sw = self.doc.swatch(n)?;
|
||
match &sw.value {
|
||
SwatchValue::None => return None,
|
||
// [Paper] prints no ink (it knocks out what lies below); its colour is only what
|
||
// the screen shows. Written as RGB white (`1 1 1 rg`) it would put DeviceRGB in a
|
||
// CMYK print file.
|
||
SwatchValue::Paper { .. } if self.for_print() => return Some(device(&Color::cmyk(0.0, 0.0, 0.0, 0.0), self.rgb_only)),
|
||
SwatchValue::Tint { base, tint: bt } => {
|
||
t *= bt;
|
||
n = base;
|
||
}
|
||
SwatchValue::Registration => return Some(registration(t, self.rgb_only)),
|
||
SwatchValue::Color { color: _, color_type: ColorType::Spot } => {
|
||
// Ink Manager: an alias prints on another ink; converted inks go to process.
|
||
let (ink, process) = self.doc.inks.resolve(&sw.name);
|
||
let target =
|
||
self.doc.swatch(ink).filter(|w| matches!(w.value, SwatchValue::Color { color_type: ColorType::Spot, .. })).unwrap_or(sw);
|
||
let SwatchValue::Color { color, .. } = &target.value else { break };
|
||
if process {
|
||
return Some(device(&designcraft_color::swatch::apply_tint(*color, t), self.rgb_only));
|
||
}
|
||
let space = SeparationSpace::new(SeparationColorant::Custom(target.name.clone()), regular(color, self.rgb_only));
|
||
return Some(SepColor::new(q(t), space).into());
|
||
}
|
||
_ => break,
|
||
}
|
||
}
|
||
self.doc.resolve_color(name, tint).map(|c| device(&c, self.rgb_only))
|
||
}
|
||
|
||
fn spread(&mut self, s: &mut Surface, si: usize) {
|
||
let doc = self.doc;
|
||
let Some(sp) = doc.spreads.get(si) else { return };
|
||
let first = doc.first_page_of_spread(si);
|
||
for layer in doc.layers.iter().rev() {
|
||
if !layer.visible || !layer.printable {
|
||
continue;
|
||
}
|
||
for (pi, page) in sp.pages.iter().enumerate() {
|
||
if !page.show_parent_items {
|
||
continue;
|
||
}
|
||
let Some((ppi, ppage)) = doc.parent_page_for(first + pi) else { continue };
|
||
let parent = &doc.parents[ppi];
|
||
let dx = page.x - parent.pages[ppage].x;
|
||
let page_name = doc.page_name(first + pi);
|
||
for it in &parent.items {
|
||
if it.layer != layer.id || page.overridden.contains(&it.id) {
|
||
continue;
|
||
}
|
||
// Parent items belong to the parent page they sit on.
|
||
if parent.page_at_x(it.bounds().center().x) != Some(ppage) && parent.pages.len() > 1 {
|
||
continue;
|
||
}
|
||
self.top_item(s, it, Affine::translate((dx, 0.0)), Some(&page_name), true);
|
||
}
|
||
}
|
||
for it in &sp.items {
|
||
if it.layer == layer.id {
|
||
self.top_item(s, it, Affine::IDENTITY, None, false);
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
/// Push blend/opacity for an item drawn as a group. Returns the number of pushes.
|
||
fn push_group(s: &mut Surface, opacity: f32, mode: DcBlend) -> usize {
|
||
let mut n = 0;
|
||
if mode != DcBlend::Normal {
|
||
s.push_blend_mode(blend(mode));
|
||
n += 1;
|
||
}
|
||
if opacity < 0.999 {
|
||
s.push_opacity(norm(opacity));
|
||
n += 1;
|
||
} else if mode != DcBlend::Normal {
|
||
s.push_isolated();
|
||
n += 1;
|
||
}
|
||
n
|
||
}
|
||
|
||
/// Isolate Blending / Knockout groups: an isolated transparency group (knockout is drawn
|
||
/// isolated too).
|
||
fn push_isolation(s: &mut Surface, it: &Item) -> usize {
|
||
if it.isolate || it.knockout {
|
||
s.push_isolated();
|
||
1
|
||
} else {
|
||
0
|
||
}
|
||
}
|
||
|
||
/// A spread or parent item, inside its structure tag when tagging.
|
||
fn top_item(&mut self, s: &mut Surface, it: &Item, parent: Affine, page_name: Option<&str>, on_parent: bool) {
|
||
if !self.opts.tagged || it.hidden || it.nonprinting {
|
||
return self.item(s, it, parent, page_name);
|
||
}
|
||
let story = it.text_frame().map(|t| t.story);
|
||
let figure = !it.alt_text.is_empty() || matches!(it.content, Content::Graphic(_)) || it.has_nested_items();
|
||
if on_parent || it.export_options.artifact || (story.is_none() && !figure) {
|
||
// Page furniture and decoration.
|
||
let kind = if on_parent { ArtifactType::Page } else { ArtifactType::Other };
|
||
s.start_tagged(ContentTag::Artifact(Artifact::new(kind, None)));
|
||
self.item(s, it, parent, page_name);
|
||
s.end_tagged();
|
||
return;
|
||
}
|
||
if let Some(sid) = story {
|
||
// Text runs tag themselves by paragraph; the rest of the frame is an artifact.
|
||
if let std::collections::hash_map::Entry::Vacant(e) = self.story_tags.entry(sid) {
|
||
e.insert(Vec::new());
|
||
self.tags.push(TagEntry::Story(sid));
|
||
}
|
||
self.tag_story = Some(sid);
|
||
self.item(s, it, parent, page_name);
|
||
self.tag_story = None;
|
||
return;
|
||
}
|
||
let id = s.start_tagged(ContentTag::Other);
|
||
self.item(s, it, parent, page_name);
|
||
s.end_tagged();
|
||
let alt = (!it.alt_text.is_empty()).then(|| it.alt_text.clone());
|
||
let mut g = TagGroup::new(Tag::Figure(alt));
|
||
g.push(id);
|
||
self.tags.push(TagEntry::Figure(g));
|
||
}
|
||
|
||
/// The structure tree: stories (one paragraph each, its frames in thread order of appearance)
|
||
/// and figures, in the order they first appear.
|
||
fn tag_tree(&mut self) -> TagTree {
|
||
let mut tree = TagTree::new();
|
||
for e in std::mem::take(&mut self.tags) {
|
||
match e {
|
||
TagEntry::Story(sid) => {
|
||
// One structure element per paragraph: headings and quotes from the
|
||
// paragraph style's Export Tagging, else P.
|
||
let mut paras: Vec<usize> = self.para_tags.keys().filter(|(s, _)| *s == sid).map(|(_, p)| *p).collect();
|
||
paras.sort_unstable();
|
||
let story = self.doc.story(sid);
|
||
for pi in paras {
|
||
let ids = self.para_tags.remove(&(sid, pi)).unwrap_or_default();
|
||
let style = story.and_then(|st| st.paras.get(pi)).map(|p| p.style.clone()).unwrap_or_default();
|
||
let tag = self.doc.styles.export_tag(&style, false).map(|e| e.tag.clone()).unwrap_or_default();
|
||
let text = || story.and_then(|st| st.para_ranges().get(pi).map(|r| st.text[r.clone()].trim().to_string()));
|
||
let kind: krilla::tagging::TagKind = match tag.as_str() {
|
||
h if h.len() == 2 && h.starts_with('h') => {
|
||
let n = h[1..].parse::<u16>().unwrap_or(1).clamp(1, 6);
|
||
Tag::Hn(std::num::NonZeroU16::new(n).unwrap_or(std::num::NonZeroU16::MIN), text()).into()
|
||
}
|
||
"blockquote" => Tag::BlockQuote.into(),
|
||
_ => Tag::P.into(),
|
||
};
|
||
let mut g = TagGroup::new(kind);
|
||
for id in ids {
|
||
g.push(id);
|
||
}
|
||
tree.push(g);
|
||
}
|
||
}
|
||
TagEntry::Figure(g) => tree.push(g),
|
||
}
|
||
}
|
||
tree
|
||
}
|
||
|
||
fn item(&mut self, s: &mut Surface, it: &Item, parent: Affine, page_name: Option<&str>) {
|
||
let gf = &it.effects.gradient_feather;
|
||
if !gf.on || it.hidden || it.nonprinting {
|
||
return self.item_inner(s, it, parent, page_name);
|
||
}
|
||
// Gradient feather: a luminosity mask (white = opaque) over the object.
|
||
let xf = parent * it.xf;
|
||
let (p0, p1) = gf.points(it.inner_bounds());
|
||
let gray = |a: f32| -> krilla::color::Color { luma::Color::new((a.clamp(0.0, 1.0) * 255.0).round() as u8).into() };
|
||
let stops = vec![
|
||
Stop { offset: NormalizedF32::ZERO, color: gray(gf.start), opacity: NormalizedF32::ONE },
|
||
Stop { offset: NormalizedF32::ONE, color: gray(gf.end), opacity: NormalizedF32::ONE },
|
||
];
|
||
let paint: krilla::paint::Paint = if gf.radial {
|
||
let r = (p1 - p0).hypot().max(1e-3) as f32;
|
||
RadialGradient {
|
||
fx: p0.x as f32,
|
||
fy: p0.y as f32,
|
||
fr: 0.0,
|
||
cx: p0.x as f32,
|
||
cy: p0.y as f32,
|
||
cr: r,
|
||
transform: Transform::identity(),
|
||
spread_method: SpreadMethod::Pad,
|
||
stops,
|
||
anti_alias: false,
|
||
}
|
||
.into()
|
||
} else {
|
||
LinearGradient {
|
||
x1: p0.x as f32,
|
||
y1: p0.y as f32,
|
||
x2: p1.x as f32,
|
||
y2: p1.y as f32,
|
||
transform: Transform::identity(),
|
||
spread_method: SpreadMethod::Pad,
|
||
stops,
|
||
anti_alias: false,
|
||
}
|
||
.into()
|
||
};
|
||
let area = it.inner_bounds().inflate(it.stroke.extent() + 4.0, it.stroke.extent() + 4.0);
|
||
let mut sb = s.stream_builder();
|
||
let mut ms = sb.surface();
|
||
ms.push_transform(&tf(xf));
|
||
if let Some(p) = to_path(&area.to_path(0.1)) {
|
||
ms.set_fill(Some(Fill { paint, opacity: NormalizedF32::ONE, rule: FillRule::NonZero }));
|
||
ms.draw_path(&p);
|
||
}
|
||
ms.pop();
|
||
ms.finish();
|
||
let stream = sb.finish();
|
||
s.push_mask(krilla::mask::Mask::new(stream, krilla::mask::MaskType::Luminosity));
|
||
self.item_inner(s, it, parent, page_name);
|
||
s.pop();
|
||
}
|
||
|
||
fn item_inner(&mut self, s: &mut Surface, it: &Item, parent: Affine, page_name: Option<&str>) {
|
||
if it.hidden || it.nonprinting {
|
||
return;
|
||
}
|
||
let ds = &it.effects.drop_shadow;
|
||
let grow = it.stroke.extent() + 2.0 + if ds.on { ds.distance.abs() + ds.size.abs() } else { 0.0 };
|
||
let vb = parent.transform_rect_bbox(it.bounds()).inflate(grow, grow);
|
||
if !rects_overlap(vb, self.clip) {
|
||
return;
|
||
}
|
||
let xf = parent * it.xf;
|
||
if it.has_nested_items() {
|
||
// A frame with items pasted into it: fill, the items clipped to the frame, stroke.
|
||
let bp = if it.corners.is_none() { it.path.to_bezpath() } else { corners::apply(&it.path, &it.corners) };
|
||
let path = to_path(&bp);
|
||
let pushes = Self::push_group(s, it.opacity, it.blend);
|
||
s.push_transform(&tf(xf));
|
||
if !it.fill.is_none()
|
||
&& let Some(p) = &path
|
||
&& let Some(paint) = self.fill_paint(&it.fill, bp.bounding_box())
|
||
{
|
||
s.set_stroke(None);
|
||
s.set_fill(Some(Fill { paint, opacity: NormalizedF32::ONE, rule: FillRule::NonZero }));
|
||
s.draw_path(p);
|
||
s.set_fill(None);
|
||
}
|
||
s.pop();
|
||
// The clip in page space, so the children keep their absolute transforms.
|
||
let mut page_bp = bp.clone();
|
||
page_bp.apply_affine(xf);
|
||
let clip = to_path(&page_bp);
|
||
if let Some(c) = &clip {
|
||
s.push_clip_path(c, &FillRule::NonZero);
|
||
}
|
||
for c in it.children() {
|
||
self.item(s, c, xf, page_name);
|
||
}
|
||
if clip.is_some() {
|
||
s.pop();
|
||
}
|
||
if !it.stroke.is_none()
|
||
&& let Some(p) = &path
|
||
{
|
||
s.push_transform(&tf(xf));
|
||
self.stroke(s, it, &bp, p);
|
||
s.pop();
|
||
}
|
||
for _ in 0..pushes {
|
||
s.pop();
|
||
}
|
||
return;
|
||
}
|
||
if !it.children().is_empty() {
|
||
let pushes = Self::push_group(s, it.opacity, it.blend) + Self::push_isolation(s, it);
|
||
for c in it.shown_children() {
|
||
self.item(s, c, xf, page_name);
|
||
}
|
||
for _ in 0..pushes {
|
||
s.pop();
|
||
}
|
||
return;
|
||
}
|
||
let doc = self.doc;
|
||
let bp = if it.corners.is_none() { it.path.to_bezpath() } else { corners::apply(&it.path, &it.corners) };
|
||
let path = to_path(&bp);
|
||
let pushes = Self::push_group(s, it.opacity, it.blend);
|
||
let frame_art = self.tag_story.is_some();
|
||
if frame_art {
|
||
s.start_tagged(ContentTag::Artifact(Artifact::new(ArtifactType::Other, None)));
|
||
}
|
||
// Drop shadow (simple offset silhouette, like the renderer).
|
||
if ds.on
|
||
&& let Some(p) = &path
|
||
&& let Some(c) = self.swatch_color(&ds.color, 1.0)
|
||
{
|
||
let a = self.doc.light_angle(ds.angle, ds.global_light).to_radians();
|
||
let off = Vec2::new(-a.cos() * ds.distance, a.sin() * ds.distance);
|
||
s.push_transform(&tf(Affine::translate(off) * xf));
|
||
s.set_stroke(None);
|
||
s.set_fill(Some(solid_fill(c, ds.opacity)));
|
||
s.draw_path(p);
|
||
s.set_fill(None);
|
||
s.pop();
|
||
}
|
||
s.push_transform(&tf(xf));
|
||
// Fill.
|
||
if !it.fill.is_none()
|
||
&& it.path.is_closed()
|
||
&& let Some(p) = &path
|
||
&& let Some(paint) = self.fill_paint(&it.fill, bp.bounding_box())
|
||
{
|
||
if it.fill.overprint {
|
||
self.warn("overprint is not exported yet");
|
||
}
|
||
s.set_stroke(None);
|
||
s.set_fill(Some(Fill { paint, opacity: NormalizedF32::ONE, rule: FillRule::NonZero }));
|
||
s.draw_path(p);
|
||
s.set_fill(None);
|
||
}
|
||
if frame_art {
|
||
s.end_tagged();
|
||
}
|
||
// Content.
|
||
match &it.content {
|
||
Content::Graphic(g) => {
|
||
let g = &if it.media.is_some() { it.drawn_graphic(&self.doc.assets).unwrap_or_else(|| g.clone()) } else { g.clone() };
|
||
if let Some(p) = &path {
|
||
s.push_clip_path(p, &FillRule::NonZero);
|
||
self.graphic(s, g);
|
||
s.pop();
|
||
}
|
||
}
|
||
Content::Text(tfr) => {
|
||
let cs = self.cache.get(doc, tfr.story, page_name);
|
||
if let (Some(ft), Some(pt)) = (cs.frame(it.id), &tfr.options.path) {
|
||
// Type on a path: the glyphs as outlines along the path.
|
||
for (si, gp) in designcraft_compose::path_glyphs(&cs, ft, &bp, pt) {
|
||
let st = &cs.styles[si as usize];
|
||
if let (Some(c), Some(p)) = (self.swatch_color(&st.fill, st.fill_tint), to_path(&gp)) {
|
||
s.set_fill(Some(Fill { paint: c.into(), opacity: NormalizedF32::ONE, rule: FillRule::NonZero }));
|
||
s.draw_path(&p);
|
||
s.set_fill(None);
|
||
}
|
||
}
|
||
} else if let Some(ft) = cs.frame(it.id) {
|
||
let text = doc.story(tfr.story).map(|st| st.text.as_str()).unwrap_or("");
|
||
let local = doc.text_local(it);
|
||
if local != Affine::IDENTITY {
|
||
s.push_transform(&tf(local));
|
||
}
|
||
self.frame_text(s, &cs, ft, text);
|
||
if local != Affine::IDENTITY {
|
||
s.pop();
|
||
}
|
||
}
|
||
}
|
||
_ => {}
|
||
}
|
||
// Stroke.
|
||
if !it.stroke.is_none()
|
||
&& let Some(p) = &path
|
||
{
|
||
if frame_art {
|
||
s.start_tagged(ContentTag::Artifact(Artifact::new(ArtifactType::Other, None)));
|
||
}
|
||
self.stroke(s, it, &bp, p);
|
||
if frame_art {
|
||
s.end_tagged();
|
||
}
|
||
}
|
||
s.pop();
|
||
for _ in 0..pushes {
|
||
s.pop();
|
||
}
|
||
// Anchored objects in the frame's text.
|
||
if let Content::Text(tfr) = &it.content
|
||
&& let Some(st) = doc.story(tfr.story).filter(|st| !st.objects.is_empty())
|
||
{
|
||
let cs = self.cache.get(doc, tfr.story, page_name);
|
||
if let Some(ft) = cs.frame(it.id) {
|
||
for o in &ft.objects {
|
||
if let Some(obj) = st.objects.get(o.index) {
|
||
self.item(s, &obj.item, xf * Affine::translate(o.origin.to_vec2()), page_name);
|
||
}
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
/// A swatch fill (solid or gradient) in the item's inner space. `None` for [None]/unknown.
|
||
fn fill_paint(&mut self, fill: &designcraft_doc::Fill, bounds: Rect) -> Option<krilla::paint::Paint> {
|
||
let (swatch, tint, angle) = (fill.swatch.as_str(), fill.tint, fill.gradient_angle);
|
||
if let Some(g) = designcraft_color::swatch::resolve_gradient(&self.doc.swatches, swatch) {
|
||
let kind = g.kind;
|
||
let expanded = g.expanded_stops();
|
||
// A PDF shading needs one colour space. Midpoint expansion can introduce RGB even
|
||
// when every authored stop is CMYK/Gray; PDF/A can also change the output space.
|
||
let components = |c: &Color| match c {
|
||
Color::Cmyk { .. } if !self.rgb_only => 4,
|
||
Color::Gray { .. } => 1,
|
||
_ => 3,
|
||
};
|
||
let mixed = expanded.first().is_some_and(|(_, first, _)| expanded.iter().any(|(_, c, _)| components(c) != components(first)));
|
||
if mixed {
|
||
self.warn(format!("gradient '{swatch}': mixed color spaces converted to RGB (colour appearance and separations may change)"));
|
||
}
|
||
let mut stops: Vec<Stop> = Vec::new();
|
||
let mut last = 0.0f32;
|
||
for (o, c, a) in expanded {
|
||
let o = o.clamp(last, 1.0);
|
||
last = o;
|
||
let color = if mixed && !matches!(c, Color::Rgb { .. }) {
|
||
let [r, g, b] = c.to_rgb();
|
||
rgb::Color::new(q(r), q(g), q(b)).into()
|
||
} else {
|
||
// Preserve RGB values, including already-interpolated display RGB, and
|
||
// leave every homogeneous gradient on its existing device-space path.
|
||
device(&c, self.rgb_only)
|
||
};
|
||
stops.push(Stop { offset: norm(o), color, opacity: norm(a) });
|
||
}
|
||
if stops.is_empty() {
|
||
return None;
|
||
}
|
||
let c = bounds.center();
|
||
let v = fill.gradient_vector;
|
||
return Some(match kind {
|
||
GradientKind::Radial => {
|
||
let (c, r) = match v {
|
||
Some([x0, y0, x1, y1]) => (designcraft_geom::Point::new(x0, y0), Vec2::new(x1 - x0, y1 - y0).hypot()),
|
||
None => (c, bounds.width().max(bounds.height()) / 2.0),
|
||
};
|
||
let r = r.max(1e-3) as f32;
|
||
let (cx, cy) = (c.x as f32, c.y as f32);
|
||
RadialGradient {
|
||
fx: cx,
|
||
fy: cy,
|
||
fr: 0.0,
|
||
cx,
|
||
cy,
|
||
cr: r,
|
||
transform: Transform::identity(),
|
||
spread_method: SpreadMethod::Pad,
|
||
stops,
|
||
anti_alias: false,
|
||
}
|
||
.into()
|
||
}
|
||
_ => {
|
||
let a = angle.unwrap_or(0.0).to_radians();
|
||
let half = ((bounds.width() * a.cos().abs() + bounds.height() * a.sin().abs()) / 2.0).max(1e-3);
|
||
let d = Vec2::new(a.cos(), -a.sin()) * half;
|
||
let (p0, p1) = match v {
|
||
Some([x0, y0, x1, y1]) => (designcraft_geom::Point::new(x0, y0), designcraft_geom::Point::new(x1, y1)),
|
||
None => (c - d, c + d),
|
||
};
|
||
LinearGradient {
|
||
x1: p0.x as f32,
|
||
y1: p0.y as f32,
|
||
x2: p1.x as f32,
|
||
y2: p1.y as f32,
|
||
transform: Transform::identity(),
|
||
spread_method: SpreadMethod::Pad,
|
||
stops,
|
||
anti_alias: false,
|
||
}
|
||
.into()
|
||
}
|
||
});
|
||
}
|
||
self.swatch_color(swatch, tint).map(Into::into)
|
||
}
|
||
|
||
fn stroke(&mut self, s: &mut Surface, it: &Item, bp: &BezPath, path: &Path) {
|
||
let st = &it.stroke;
|
||
let Some(c) = self.swatch_color(&st.swatch, st.tint) else { return };
|
||
let closed = it.path.is_closed();
|
||
let mut cap = match st.cap {
|
||
designcraft_doc::Cap::Butt => krilla::paint::LineCap::Butt,
|
||
designcraft_doc::Cap::Round => krilla::paint::LineCap::Round,
|
||
designcraft_doc::Cap::Projecting => krilla::paint::LineCap::Square,
|
||
};
|
||
let kind = self.doc.stroke_kind(&st.kind);
|
||
// Stripes, wavy and hash strokes: a filled outline (gap colour under it).
|
||
if let Some(o) = kind.outline(bp, st.weight, 0.05)
|
||
&& let Some(op) = to_path(&o)
|
||
{
|
||
s.set_stroke(None);
|
||
if let Some(g) = self.swatch_color(&st.gap_swatch, st.gap_tint)
|
||
&& st.gap_swatch != designcraft_color::swatch::NONE
|
||
{
|
||
s.set_stroke(Some(Stroke { paint: g.into(), width: st.weight as f32, opacity: NormalizedF32::ONE, ..Default::default() }));
|
||
s.set_fill(None);
|
||
s.draw_path(path);
|
||
s.set_stroke(None);
|
||
}
|
||
s.set_fill(Some(Fill { paint: c.into(), opacity: NormalizedF32::ONE, rule: FillRule::NonZero }));
|
||
s.draw_path(&op);
|
||
s.set_fill(None);
|
||
return;
|
||
}
|
||
let dash = match &kind {
|
||
StrokeType::Dashed { pattern } if pattern.iter().any(|v| *v > 0.0) => {
|
||
let mut pat: Vec<f32> = pattern.iter().map(|v| v.max(0.0) as f32).collect();
|
||
if pat.len() % 2 == 1 {
|
||
pat.extend(pat.clone());
|
||
}
|
||
Some(StrokeDash { array: pat, offset: 0.0 })
|
||
}
|
||
StrokeType::Dotted => {
|
||
cap = krilla::paint::LineCap::Round;
|
||
Some(StrokeDash { array: vec![0.0, (st.weight * 2.0) as f32], offset: 0.0 })
|
||
}
|
||
_ => None,
|
||
};
|
||
let arrows = designcraft_doc::arrow::apply(bp, st, closed);
|
||
let trimmed = arrows.as_ref().and_then(|a| to_path(&a.0));
|
||
let path = trimmed.as_ref().unwrap_or(path);
|
||
let aligned = closed && st.align != StrokeAlign::Center;
|
||
let width = if aligned { st.weight * 2.0 } else { st.weight };
|
||
let mut pushes = 0;
|
||
match st.align {
|
||
StrokeAlign::Inside if closed => {
|
||
s.push_clip_path(path, &FillRule::NonZero);
|
||
pushes += 1;
|
||
}
|
||
StrokeAlign::Outside if closed => {
|
||
// Clip to everything outside the path: a big frame plus the path, even-odd.
|
||
let b = bp.bounding_box().inflate(width * 2.0 + 10.0, width * 2.0 + 10.0);
|
||
let mut outside = b.to_path(0.1);
|
||
outside.extend(bp.iter());
|
||
if let Some(p) = to_path(&outside) {
|
||
s.push_clip_path(&p, &FillRule::EvenOdd);
|
||
pushes += 1;
|
||
}
|
||
}
|
||
_ => {}
|
||
}
|
||
s.set_fill(None);
|
||
if dash.is_some()
|
||
&& pushes == 0
|
||
&& let Some(g) = self.swatch_color(&st.gap_swatch, st.gap_tint)
|
||
{
|
||
// Gap colour under dashes and dots.
|
||
s.set_stroke(Some(Stroke { paint: g.into(), width: width as f32, opacity: NormalizedF32::ONE, ..Default::default() }));
|
||
s.draw_path(path);
|
||
}
|
||
s.set_stroke(Some(Stroke {
|
||
paint: c.clone().into(),
|
||
width: width as f32,
|
||
miter_limit: st.miter_limit.max(1.0) as f32,
|
||
line_cap: cap,
|
||
line_join: match st.join {
|
||
designcraft_doc::Join::Miter => krilla::paint::LineJoin::Miter,
|
||
designcraft_doc::Join::Round => krilla::paint::LineJoin::Round,
|
||
designcraft_doc::Join::Bevel => krilla::paint::LineJoin::Bevel,
|
||
},
|
||
opacity: NormalizedF32::ONE,
|
||
dash,
|
||
}));
|
||
s.draw_path(path);
|
||
s.set_stroke(None);
|
||
for _ in 0..pushes {
|
||
s.pop();
|
||
}
|
||
for h in arrows.iter().flat_map(|a| &a.1) {
|
||
let Some(p) = to_path(&h.path) else { continue };
|
||
match h.outline {
|
||
Some(w) => {
|
||
s.set_stroke(Some(Stroke { paint: c.clone().into(), width: w as f32, opacity: NormalizedF32::ONE, ..Default::default() }));
|
||
s.draw_path(&p);
|
||
s.set_stroke(None);
|
||
}
|
||
None => {
|
||
s.set_fill(Some(krilla::paint::Fill { paint: c.clone().into(), opacity: NormalizedF32::ONE, rule: FillRule::NonZero }));
|
||
s.draw_path(&p);
|
||
s.set_fill(None);
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
/// A placed PDF as krilla embeds it. krilla refuses a PDF newer than the file it writes (the
|
||
/// export fails at the end with `VersionMismatch(Pdf17)`), and PDF/X-4 is PDF 1.6 while
|
||
/// VectorCraft and most tools write 1.7. PDF 1.7 changed nothing in how a page draws, so a 1.7
|
||
/// file goes in as 1.6 (its header relabelled, as `qpdf --force-version=1.6` does). A newer
|
||
/// file is left out and the export fails naming it ([`Exporter::check_placed_versions`]).
|
||
fn placed_pdf(&mut self, asset: &designcraft_doc::Asset) -> Option<krilla::pdf::PdfDocument> {
|
||
use hayro_syntax::PdfVersion as V;
|
||
let Ok(pdf) = krilla::pdf::Pdf::new(asset.data.clone()) else {
|
||
self.warn(format!("{}: can't read the placed PDF", asset.name));
|
||
return None;
|
||
};
|
||
let max = match self.version {
|
||
PdfVersion::Pdf14 => V::Pdf14,
|
||
PdfVersion::Pdf15 => V::Pdf15,
|
||
PdfVersion::Pdf16 => V::Pdf16,
|
||
PdfVersion::Pdf17 => V::Pdf17,
|
||
PdfVersion::Pdf20 => V::Pdf20,
|
||
};
|
||
let have = pdf.version();
|
||
if have <= max {
|
||
return Some(krilla::pdf::PdfDocument::new(Arc::new(pdf)));
|
||
}
|
||
if have == V::Pdf17
|
||
&& max == V::Pdf16
|
||
&& let Some(bytes) = relabel_pdf_header(&asset.data, b"%PDF-1.7", b"%PDF-1.6")
|
||
&& let Ok(pdf) = krilla::pdf::Pdf::new(Arc::new(bytes))
|
||
&& pdf.version() <= max
|
||
{
|
||
self.warn(format!("{}: a PDF 1.7 placed in a PDF 1.6 file, embedded as PDF 1.6", asset.name));
|
||
return Some(krilla::pdf::PdfDocument::new(Arc::new(pdf)));
|
||
}
|
||
let v = match have {
|
||
V::Pdf17 => "PDF 1.7",
|
||
V::Pdf20 => "PDF 2.0",
|
||
_ => "a newer PDF",
|
||
};
|
||
self.too_new.push(format!("{} is {v}", asset.name));
|
||
None
|
||
}
|
||
|
||
/// Fail with the names of placed PDFs too new for this export (see [`Exporter::placed_pdf`]).
|
||
fn check_placed_versions(&self) -> Result<()> {
|
||
if self.too_new.is_empty() {
|
||
return Ok(());
|
||
}
|
||
let v = self.version.as_str();
|
||
Err(PdfError::Write(format!(
|
||
"a placed PDF is newer than the {v} this export writes ({}): save it as {v} or older and place it again",
|
||
self.too_new.join(", ")
|
||
)))
|
||
}
|
||
|
||
fn load_image(&mut self, id: AssetId) -> Option<Image> {
|
||
if let Some(i) = self.images.get(&id) {
|
||
return i.clone();
|
||
}
|
||
let asset = self.doc.assets.get(&id)?.clone();
|
||
let data = asset.data.clone();
|
||
let fmt = image::guess_format(&data).ok();
|
||
let mut mode = RasterMode::for_standard(self.opts.standard);
|
||
mode.interpolate &= self.interpolate;
|
||
let img = match fmt {
|
||
Some(image::ImageFormat::Jpeg) => jpeg(data.clone().into(), || embedded_icc(&data), mode),
|
||
// A CMYK TIFF keeps its ink values (`image` decodes it to RGB, and 100% K would print
|
||
// as four-colour black). PDF/A exports are RGB only.
|
||
Some(image::ImageFormat::Tiff) if !self.rgb_only && designcraft_images::is_cmyk_tiff(&data) => match cmyk_tiff(&data, mode) {
|
||
Some(img) => Some(img),
|
||
None => {
|
||
self.warn(format!(
|
||
"{}: converted to RGB (a CMYK TIFF that is planar, has premultiplied alpha, uses other inks or is over 256 MiB)",
|
||
asset.name
|
||
));
|
||
lossless(&data, fmt, mode)
|
||
}
|
||
},
|
||
_ if self.opts.compress_images => recompress(&data, mode).or_else(|| lossless(&data, fmt, mode)),
|
||
_ => lossless(&data, fmt, mode),
|
||
};
|
||
if img.is_none() {
|
||
self.warn(format!("image `{}` could not be decoded and was skipped", asset.name));
|
||
}
|
||
self.images.insert(id, img.clone());
|
||
img
|
||
}
|
||
|
||
pub(crate) fn graphic(&mut self, s: &mut Surface, g: &designcraft_doc::Graphic) {
|
||
// Video / sound without a poster: a dark frame with a play mark.
|
||
if let Some(asset) = self.doc.assets.get(&g.asset)
|
||
&& designcraft_doc::media_kind(&asset.mime).is_some()
|
||
{
|
||
let (w, h) = g.size;
|
||
let (cx, cy, r) = (w / 2.0, h / 2.0, w.min(h) * 0.18);
|
||
let mut tri = BezPath::new();
|
||
tri.move_to((cx - r * 0.6, cy - r));
|
||
tri.line_to((cx + r, cy));
|
||
tri.line_to((cx - r * 0.6, cy + r));
|
||
tri.close_path();
|
||
s.push_transform(&tf(g.xf));
|
||
s.set_stroke(None);
|
||
for (bp, c) in [(Rect::new(0.0, 0.0, w, h).to_path(0.1), rgb::Color::new(48, 48, 52)), (tri, rgb::Color::new(235, 235, 235))] {
|
||
if let Some(p) = to_path(&bp) {
|
||
s.set_fill(Some(Fill { paint: c.into(), ..Default::default() }));
|
||
s.draw_path(&p);
|
||
}
|
||
}
|
||
s.set_fill(None);
|
||
s.pop();
|
||
return;
|
||
}
|
||
// Placed PDFs go in as vectors (the page as a form XObject).
|
||
let doc = self.doc;
|
||
if let Some(asset) = doc.assets.get(&g.asset)
|
||
&& asset.data.starts_with(b"%PDF")
|
||
{
|
||
let Some(size) = Size::from_wh(g.size.0.max(1e-3) as f32, g.size.1.max(1e-3) as f32) else { return };
|
||
let placed = match self.pdfs.get(&g.asset) {
|
||
Some(p) => p.clone(),
|
||
None => {
|
||
let p = self.placed_pdf(asset);
|
||
self.pdfs.insert(g.asset, p.clone());
|
||
p
|
||
}
|
||
};
|
||
if let Some(placed) = placed {
|
||
s.push_transform(&tf(g.xf));
|
||
s.draw_pdf_page(&placed, size, asset.page as usize);
|
||
s.pop();
|
||
}
|
||
return;
|
||
}
|
||
// Placed SVGs go in as vectors too.
|
||
if let Some(asset) = self.doc.assets.get(&g.asset)
|
||
&& designcraft_images::is_svg(&asset.data)
|
||
{
|
||
let Some(size) = Size::from_wh(g.size.0.max(1e-3) as f32, g.size.1.max(1e-3) as f32) else { return };
|
||
let tree = self.svgs.entry(g.asset).or_insert_with(|| designcraft_images::svg_tree(&asset.data).map(Arc::new)).clone();
|
||
match tree {
|
||
Some(tree) => {
|
||
use krilla_svg::SurfaceExt;
|
||
s.push_transform(&tf(g.xf));
|
||
if s.draw_svg(&tree, size, krilla_svg::SvgSettings::default()).is_none() {
|
||
self.warn(format!("{}: parts of the placed SVG could not be drawn", asset.name));
|
||
}
|
||
s.pop();
|
||
}
|
||
None => self.warn(format!("{}: can't read the placed SVG", asset.name)),
|
||
}
|
||
return;
|
||
}
|
||
let Some(img) = self.load_image(g.asset) else { return };
|
||
let Some(size) = Size::from_wh(g.size.0.max(1e-3) as f32, g.size.1.max(1e-3) as f32) else { return };
|
||
s.push_transform(&tf(g.xf));
|
||
s.draw_image(img, size);
|
||
s.pop();
|
||
}
|
||
}
|
||
|
||
/// `data` with its `%PDF-x.y` header (within the first 1024 bytes, where readers look for it)
|
||
/// changed from `from` to `to`, both the same length. `None` when the header isn't `from`.
|
||
fn relabel_pdf_header(data: &[u8], from: &[u8], to: &[u8]) -> Option<Vec<u8>> {
|
||
if from.len() != to.len() {
|
||
return None;
|
||
}
|
||
let head = data.get(..data.len().min(1024))?;
|
||
let at = head.windows(from.len()).position(|w| w == from)?;
|
||
let mut out = data.to_vec();
|
||
out.get_mut(at..at + to.len())?.copy_from_slice(to);
|
||
Some(out)
|
||
}
|
||
|
||
/// The sRGB profile (ICC v2.1) that untagged RGB images carry in PDF/X-4.
|
||
pub(crate) static SRGB_ICC: &[u8] = include_bytes!("../../../assets/icc/sRGB-v2-magic.icc");
|
||
|
||
/// How raster images are written for the export's standard.
|
||
#[derive(Clone, Copy, Debug, PartialEq, Eq)]
|
||
struct RasterMode {
|
||
/// `/Interpolate true`: smoother upscaling in viewers. PDF/X-4 and PDF/A don't allow it.
|
||
interpolate: bool,
|
||
/// Give RGB images with no ICC profile of their own the sRGB profile: under PDF/X-4's CMYK
|
||
/// output intent, RGB must be colour-managed.
|
||
tag_rgb: bool,
|
||
}
|
||
|
||
impl RasterMode {
|
||
fn for_standard(standard: Standard) -> Self {
|
||
Self { interpolate: standard == Standard::None, tag_rgb: standard == Standard::PdfX4 }
|
||
}
|
||
}
|
||
|
||
/// The ICC profile embedded in an image file, if it has one.
|
||
fn embedded_icc(data: &[u8]) -> Option<Vec<u8>> {
|
||
use image::ImageDecoder;
|
||
let mut dec = image::ImageReader::new(std::io::Cursor::new(data)).with_guessed_format().ok()?.into_decoder().ok()?;
|
||
dec.icc_profile().ok().flatten()
|
||
}
|
||
|
||
/// Whether an ICC profile describes RGB (its colour space signature, header bytes 16 to 20).
|
||
fn is_rgb_icc(icc: &[u8]) -> bool {
|
||
icc.get(16..20) == Some(b"RGB ".as_slice())
|
||
}
|
||
|
||
/// A JPEG, passed through. With `tag_rgb`, a JPEG keeps its own profile, and one without gets
|
||
/// sRGB. krilla uses a profile only when its channels match the JPEG's, so a grey or CMYK JPEG
|
||
/// without a profile stays DeviceGray or DeviceCMYK.
|
||
fn jpeg(data: krilla::Data, icc: impl FnOnce() -> Option<Vec<u8>>, mode: RasterMode) -> Option<Image> {
|
||
if !mode.tag_rgb {
|
||
return Image::from_jpeg(data, mode.interpolate).ok();
|
||
}
|
||
let icc: krilla::Data = match icc() {
|
||
Some(own) => own.into(),
|
||
None => SRGB_ICC.into(),
|
||
};
|
||
Image::from_jpeg_with_icc(data, Some(icc), mode.interpolate).ok()
|
||
}
|
||
|
||
/// Whether krilla would write this PNG, GIF or WebP as untagged RGB: not grey, and no profile of
|
||
/// its own.
|
||
fn untagged_rgb(data: &[u8]) -> bool {
|
||
use image::ImageDecoder;
|
||
let Some(mut dec) = image::ImageReader::new(std::io::Cursor::new(data)).with_guessed_format().ok().and_then(|r| r.into_decoder().ok()) else {
|
||
return false;
|
||
};
|
||
let grey = matches!(dec.color_type(), image::ColorType::L8 | image::ColorType::La8 | image::ColorType::L16 | image::ColorType::La16);
|
||
!grey && dec.icc_profile().ok().flatten().is_none()
|
||
}
|
||
|
||
fn lossless(data: &Arc<Vec<u8>>, fmt: Option<image::ImageFormat>, mode: RasterMode) -> Option<Image> {
|
||
let i = mode.interpolate;
|
||
// krilla reads PNG, GIF and WebP lazily: a damaged file is accepted here and fails the whole
|
||
// export when the PDF is written. Decoding it first means it is skipped, like any other
|
||
// image that can't be decoded.
|
||
let rgba = designcraft_images::decode_rgba(data)?;
|
||
let direct = match fmt {
|
||
Some(image::ImageFormat::Png | image::ImageFormat::Gif | image::ImageFormat::WebP) if mode.tag_rgb && untagged_rgb(data) => None,
|
||
Some(image::ImageFormat::Png) => Image::from_png(data.clone().into(), i).ok(),
|
||
Some(image::ImageFormat::Gif) => Image::from_gif(data.clone().into(), i).ok(),
|
||
Some(image::ImageFormat::WebP) => Image::from_webp(data.clone().into(), i).ok(),
|
||
_ => None,
|
||
};
|
||
direct.or_else(|| {
|
||
// TIFF, BMP, PSD composites… and, with `tag_rgb`, untagged RGB.
|
||
if mode.tag_rgb {
|
||
return SrgbImage::new(rgba).and_then(|img| Image::from_custom(img, i).ok());
|
||
}
|
||
let (w, h) = rgba.dimensions();
|
||
Some(Image::from_rgba8(rgba.into_raw(), w, h))
|
||
})
|
||
}
|
||
|
||
/// An RGB raster tagged with the sRGB profile, for PDF/X-4.
|
||
#[derive(Clone, Hash)]
|
||
struct SrgbImage {
|
||
rgb: Arc<Vec<u8>>,
|
||
/// Only when some pixel is not opaque.
|
||
alpha: Option<Arc<Vec<u8>>>,
|
||
size: (u32, u32),
|
||
}
|
||
|
||
impl SrgbImage {
|
||
fn new(rgba: image::RgbaImage) -> Option<Self> {
|
||
let size = rgba.dimensions();
|
||
let pixels = usize::try_from(size.0).ok()?.checked_mul(usize::try_from(size.1).ok()?)?;
|
||
let mut rgb = Vec::with_capacity(pixels.checked_mul(3)?);
|
||
let mut alpha = Vec::with_capacity(pixels);
|
||
for p in rgba.pixels() {
|
||
rgb.extend_from_slice(&p.0[..3]);
|
||
alpha.push(p.0[3]);
|
||
}
|
||
let alpha = alpha.iter().any(|a| *a < 255).then(|| Arc::new(alpha));
|
||
Some(Self { rgb: Arc::new(rgb), alpha, size })
|
||
}
|
||
}
|
||
|
||
impl krilla::image::CustomImage for SrgbImage {
|
||
fn color_channel(&self) -> &[u8] {
|
||
&self.rgb
|
||
}
|
||
fn alpha_channel(&self) -> Option<&[u8]> {
|
||
self.alpha.as_deref().map(Vec::as_slice)
|
||
}
|
||
fn bits_per_component(&self) -> krilla::image::BitsPerComponent {
|
||
krilla::image::BitsPerComponent::Eight
|
||
}
|
||
fn size(&self) -> (u32, u32) {
|
||
self.size
|
||
}
|
||
fn icc_profile(&self) -> Option<&[u8]> {
|
||
Some(SRGB_ICC)
|
||
}
|
||
fn color_space(&self) -> krilla::image::ImageColorspace {
|
||
krilla::image::ImageColorspace::Rgb
|
||
}
|
||
}
|
||
|
||
/// A CMYK raster as a krilla image: its samples are written unchanged as DeviceCMYK, like a
|
||
/// CMYK JPEG's. An embedded ICC profile is left out, as it is for JPEGs: the inks are meant for
|
||
/// the output intent's press, and tagging them with another CMYK profile would let a RIP
|
||
/// convert 100% K to four-colour black.
|
||
#[derive(Clone, Hash)]
|
||
struct CmykImage(Arc<designcraft_images::CmykRaster>);
|
||
|
||
impl krilla::image::CustomImage for CmykImage {
|
||
fn color_channel(&self) -> &[u8] {
|
||
&self.0.cmyk
|
||
}
|
||
fn alpha_channel(&self) -> Option<&[u8]> {
|
||
self.0.alpha.as_deref()
|
||
}
|
||
fn bits_per_component(&self) -> krilla::image::BitsPerComponent {
|
||
krilla::image::BitsPerComponent::Eight
|
||
}
|
||
fn size(&self) -> (u32, u32) {
|
||
(self.0.width, self.0.height)
|
||
}
|
||
fn icc_profile(&self) -> Option<&[u8]> {
|
||
None
|
||
}
|
||
fn color_space(&self) -> krilla::image::ImageColorspace {
|
||
krilla::image::ImageColorspace::Cmyk
|
||
}
|
||
}
|
||
|
||
/// A CMYK TIFF as a DeviceCMYK image. `None` when it can't be read as CMYK.
|
||
fn cmyk_tiff(data: &[u8], mode: RasterMode) -> Option<Image> {
|
||
let r = designcraft_images::decode_cmyk_tiff(data)?;
|
||
// krilla panics when the channel lengths don't match the size.
|
||
let pixels = usize::try_from(r.width).ok()?.checked_mul(usize::try_from(r.height).ok()?)?;
|
||
if r.cmyk.len() != pixels.checked_mul(4)? || r.alpha.as_ref().is_some_and(|a| a.len() != pixels) {
|
||
return None;
|
||
}
|
||
Image::from_custom(CmykImage(Arc::new(r)), mode.interpolate).ok()
|
||
}
|
||
|
||
/// Opaque raster → JPEG (quality 90). `None` when the image has transparency or can't be decoded.
|
||
/// With `tag_rgb`, the JPEG keeps the source's RGB profile, or gets sRGB.
|
||
fn recompress(data: &[u8], mode: RasterMode) -> Option<Image> {
|
||
let img = image::load_from_memory(data).ok()?;
|
||
if img.color().has_alpha() && img.to_rgba8().pixels().any(|p| p[3] < 255) {
|
||
return None;
|
||
}
|
||
let rgb = img.to_rgb8();
|
||
let mut buf = Vec::new();
|
||
let enc = image::codecs::jpeg::JpegEncoder::new_with_quality(&mut buf, 90);
|
||
image::ImageEncoder::write_image(enc, rgb.as_raw(), rgb.width(), rgb.height(), image::ExtendedColorType::Rgb8).ok()?;
|
||
jpeg(buf.into(), || embedded_icc(data).filter(|p| is_rgb_icc(p)), mode)
|
||
}
|