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M4.74: real text with embedded subset fonts in PDF

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With Convert Text to Outlines off (advanced.outlineText: false), type is
written as selectable, searchable text: each glyph in its font, embedded
as a subset with a ToUnicode map, where its outline would be (rotated,
scaled, skewed and on-path type too; gradients keep their place). Fonts
whose licence forbids embedding, or allows only whole fonts, fall back to
outlines with a warning; a subset threshold below 100% is accepted with a
warning. Laid-out glyphs now carry their glyph id and transform.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
bflatastic
2026-10-05 16:25:21 +07:00
co-authored by Claude Opus 5.5
parent 5b69862a08
commit a5367b0846
12 changed files with 412 additions and 27 deletions
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crates/engine/src/cmd/fileio/pdf.rs
+7 -2
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@@ -52,7 +52,12 @@ pub(super) const OPTIONS: &[FormatOption] = &[
default: "null",
description: "colour conversion to a destination profile, ICC profiles, output intent and Trapped (see document.exportPdf)",
},
FormatOption { name: "advanced", ty: "object", default: "null", description: "{fontSubsetPercent, outlineText, overprint}" },
FormatOption {
name: "advanced",
ty: "object",
default: "null",
description: "{fontSubsetPercent, outlineText (false: real text in embedded subset fonts), overprint}",
},
FormatOption {
name: "security",
ty: "object",
@@ -74,7 +79,7 @@ pub fn specs() -> Vec<CommandSpec> {
"Export PDF",
[],
None,
"{path?, preset?: \"VectorCraft Default\" (built-in or saved: pdf.preset.list), artboard? | artboards?: [i…] | range?: \"1-3, 5\" (1-based; default all, one page each), standard?: none|pdfA2b|pdfX1a|pdfX3|pdfX4, compatibility?: 1.4|1.5|1.6|1.7 (default)|2.0, preserveEditing? (on in VectorCraft Default: the native document as an embedded file, which document.open restores; choosing a standard turns it off, PDF/A refuses it), thumbnails?, fastWebView?, viewAfterSaving? (the app opens the written file), createLayers?, includeNonPrinting? (keep layers whose Print option is off; left out by default unless createLayers), compression?: {color?, gray?: {downsample: none|average|subsample|bicubic, ppi: 300, abovePpi: 450, compression: none|zip|jpeg|jpeg2000|auto, quality: minimum|low|medium|high|maximum}, mono?: {downsample, ppi: 1200, abovePpi: 1800, compression: none|ccittG3|ccittG4|zip|runLength} (black-and-white images), compressText?: true} (images above abovePpi are resampled to ppi; auto keeps JPEGs JPEG, the others lossless; JPEG needs opaque images; none, jpeg2000, CCITT and runLength are written as ZIP with a warning), marks?: {trim, registration, colorBars, pageInfo, kind: roman|japanese, weight: 0.25 (trim marks and targets), offset: 6 (pt from the artboard, at least the bleed)} (printer's marks in [Registration], every plate: trim marks, registration targets mid-side, CMYK/spot/black-tint colour bars on top, page information (title, artboard, date UTC) below), bleed?: {useDocument (the document's bleed, document.setup), top, bottom, left, right} (pt; art in the bleed is kept). Each page: TrimBox = artboard, BleedBox = artboard + bleed, MediaBox = that + the marks' room (art clipped to the BleedBox), output?: {conversion: none (default)|destination (every colour into the destination profile's model, CMYK or RGB, also colours of that model in another profile)|preserveNumbers (only colours of the other model and Lab; those in the destination's model keep their numbers) (grey stays grey; images are converted too, printer's marks are not), destination: profile name (edit.colorSettings lists them; default: the document's profile for its colour mode), profiles: none (device colours)|all|destination|taggedSource (documents assigned a profile: edit.assignProfile) (ICC-based colours: CMYK with the destination or document CMYK profile, RGB as sRGB, grey with the sRGB tone curve; PDF/A always), outputIntent: profile name (embedded as the catalog's /GTS_PDFX output intent; a name that isn't a profile is only named), outputCondition, outputConditionId (default: outputIntent), registry, trapped (/Trapped /True; /False when an output intent is written)} (PDF/A files keep their own output intent), advanced?: {fontSubsetPercent: 100, outlineText: true, overprint: preserve|discard}, security?: {openPassword, permissionsPassword, printing: none|low|high, changes: none|pages|forms|comments|any, copy, screenReader, plaintextMetadata}} → {path, bytes, warnings}; no path → {dataBase64, bytes, warnings}. The options apply over the preset (null keeps its value); options accepted but not applied yet come back as warnings; PDF/X, PDF/A-2b at 2.0 and a password with a PDF/A or PDF/X standard are refused. document.export {format: pdf} takes the same options",
"{path?, preset?: \"VectorCraft Default\" (built-in or saved: pdf.preset.list), artboard? | artboards?: [i…] | range?: \"1-3, 5\" (1-based; default all, one page each), standard?: none|pdfA2b|pdfX1a|pdfX3|pdfX4, compatibility?: 1.4|1.5|1.6|1.7 (default)|2.0, preserveEditing? (on in VectorCraft Default: the native document as an embedded file, which document.open restores; choosing a standard turns it off, PDF/A refuses it), thumbnails?, fastWebView?, viewAfterSaving? (the app opens the written file), createLayers?, includeNonPrinting? (keep layers whose Print option is off; left out by default unless createLayers), compression?: {color?, gray?: {downsample: none|average|subsample|bicubic, ppi: 300, abovePpi: 450, compression: none|zip|jpeg|jpeg2000|auto, quality: minimum|low|medium|high|maximum}, mono?: {downsample, ppi: 1200, abovePpi: 1800, compression: none|ccittG3|ccittG4|zip|runLength} (black-and-white images), compressText?: true} (images above abovePpi are resampled to ppi; auto keeps JPEGs JPEG, the others lossless; JPEG needs opaque images; none, jpeg2000, CCITT and runLength are written as ZIP with a warning), marks?: {trim, registration, colorBars, pageInfo, kind: roman|japanese, weight: 0.25 (trim marks and targets), offset: 6 (pt from the artboard, at least the bleed)} (printer's marks in [Registration], every plate: trim marks, registration targets mid-side, CMYK/spot/black-tint colour bars on top, page information (title, artboard, date UTC) below), bleed?: {useDocument (the document's bleed, document.setup), top, bottom, left, right} (pt; art in the bleed is kept). Each page: TrimBox = artboard, BleedBox = artboard + bleed, MediaBox = that + the marks' room (art clipped to the BleedBox), output?: {conversion: none (default)|destination (every colour into the destination profile's model, CMYK or RGB, also colours of that model in another profile)|preserveNumbers (only colours of the other model and Lab; those in the destination's model keep their numbers) (grey stays grey; images are converted too, printer's marks are not), destination: profile name (edit.colorSettings lists them; default: the document's profile for its colour mode), profiles: none (device colours)|all|destination|taggedSource (documents assigned a profile: edit.assignProfile) (ICC-based colours: CMYK with the destination or document CMYK profile, RGB as sRGB, grey with the sRGB tone curve; PDF/A always), outputIntent: profile name (embedded as the catalog's /GTS_PDFX output intent; a name that isn't a profile is only named), outputCondition, outputConditionId (default: outputIntent), registry, trapped (/Trapped /True; /False when an output intent is written)} (PDF/A files keep their own output intent), advanced?: {fontSubsetPercent: 100 (below 100 is accepted with a warning: fonts are always embedded as subsets), outlineText: true (false: type as real, selectable and searchable text in embedded subset fonts with a ToUnicode map; fonts whose licence forbids embedding, or allows only whole fonts, stay outlines with a warning), overprint: preserve|discard}, security?: {openPassword, permissionsPassword, printing: none|low|high, changes: none|pages|forms|comments|any, copy, screenReader, plaintextMetadata}} → {path, bytes, warnings}; no path → {dataBase64, bytes, warnings}. The options apply over the preset (null keeps its value); options accepted but not applied yet come back as warnings; PDF/X, PDF/A-2b at 2.0 and a password with a PDF/A or PDF/X standard are refused. document.export {format: pdf} takes the same options",
has_doc,
export_pdf
),
crates/engine/src/cmd/fileio/tests_pdfoutput.rs
+5 -3
View File
@@ -1,5 +1,5 @@
//! `document.exportPdf` output options reach the writer: colours converted and tagged with
//! profiles, and the output intent written.
//! `document.exportPdf` output and advanced options reach the writer: colours converted and tagged
//! with profiles, the output intent written, and type as real text.
use serde_json::{Value, json};
@@ -12,7 +12,7 @@ fn pdf(s: &mut Session, p: Value) -> (String, Value) {
}
#[test]
fn export_pdf_converts_colours_and_writes_the_output_intent() {
fn export_pdf_converts_colours_writes_the_output_intent_and_real_text() {
let mut s = Session::new();
s.execute("file.new", &json!({"width": 200, "height": 100})).unwrap();
s.execute("shape.rectangle", &json!({"x": 10, "y": 10, "width": 40, "height": 40})).unwrap();
@@ -23,11 +23,13 @@ fn export_pdf_converts_colours_and_writes_the_output_intent() {
"preset": "VectorCraft Default",
"compression": {"compressText": false},
"output": {"conversion": "destination", "destination": generic, "profiles": "destination", "outputIntent": generic, "outputConditionId": "Generic press", "trapped": true},
"advanced": {"outlineText": false},
});
let (text, warnings) = pdf(&mut s, p.clone());
assert_eq!(warnings, json!([]), "everything asked for is applied");
assert!(text.contains("/ICCBased") && text.contains("/N 4"), "CMYK colours tagged with the destination");
assert!(text.contains("/S/GTS_PDFX") && text.contains("/Trapped/True"));
assert!(text.contains("/ToUnicode") && (text.contains("/FontFile2") || text.contains("/FontFile3")), "real text");
// The Summary has nothing to report either.
let mut q = p;
q["includeDocument"] = json!(true);