mirror of
https://github.com/storytold/vectorcraft.git
synced 2026-10-27 19:27:21 -06:00
bflatasticandClaude Opus 5.5
54427d7a92
On screen, a group (or object) with opacity, a blend mode, an opacity mask or knockout whose content blends is drawn offscreen over a copy of its backdrop and mixed back in by its opacity, mask and clip (a group blend mode then applies to the backdrop-free result, as PDF defines it). Isolate Blending keeps the content starting from transparency. Clip groups no longer isolate their children (blending content is clipped per drawing), and non-isolated knockout groups composite their elements against the art below the group. Groups without blending inside still render as plain layers. In PDF, such groups are written as non-isolated transparency groups (a constant-alpha soft mask instead of the writer's isolated opacity group), knockout groups included. doc: Node::blends_through / children_blend. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
120 lines
3.6 KiB
Rust
120 lines
3.6 KiB
Rust
//! VectorCraft PDF export and import.
|
|
//!
|
|
//! - [`export`] writes one PDF page per artboard with `krilla`: vector paths (fills, strokes with
|
|
//! caps/joins/miter/dashes, inside/outside alignment as clips, non-zero/even-odd; arrowheads,
|
|
//! width profiles, fitted or dotted dashes as the canvas's filled outlines and brushed strokes
|
|
//! as their brush art), opacity and blend modes (transparency groups),
|
|
//! clip groups, linear/radial gradients (shadings), embedded images and text as outlined glyph
|
|
//! paths. Hidden objects, guides and template layers are skipped.
|
|
//! - [`import`] reads PDF (and PDF-compatible `.ai`) pages with `hayro-interpret` into a
|
|
//! [`Document`]: one artboard and one layer per page, paths with fill/stroke, clip groups,
|
|
//! transparency groups, axial/radial shadings → gradients, images (JPEG passthrough, others
|
|
//! re-encoded as PNG) and text as glyph outlines.
|
|
#![forbid(unsafe_code)]
|
|
|
|
mod export;
|
|
mod import;
|
|
|
|
pub use export::{export, export_with_report};
|
|
pub use import::{import, import_with_report};
|
|
|
|
use vectorcraft_doc::Document;
|
|
|
|
/// PDF standard / version to target.
|
|
#[derive(Clone, Copy, Debug, Default, PartialEq, Eq)]
|
|
pub enum Compatibility {
|
|
/// PDF 1.4.
|
|
Pdf14,
|
|
/// PDF 1.5.
|
|
Pdf15,
|
|
/// PDF 1.6.
|
|
Pdf16,
|
|
/// PDF 1.7. The default.
|
|
#[default]
|
|
Pdf17,
|
|
/// PDF 2.0.
|
|
Pdf20,
|
|
/// PDF/A-2b (archival; validated by krilla).
|
|
PdfA2b,
|
|
/// PDF/X-4 — not supported by the writer yet; export returns [`PdfError::Unsupported`].
|
|
PdfX4,
|
|
}
|
|
|
|
/// Export options.
|
|
#[derive(Clone, Debug)]
|
|
pub struct PdfOptions {
|
|
/// 0-based artboard indices to export, in page order; `None` = all artboards.
|
|
pub artboards: Option<Vec<usize>>,
|
|
pub compatibility: Compatibility,
|
|
/// Compress content streams (Flate).
|
|
pub compress: bool,
|
|
/// Document title for the metadata; `None` = the document's title.
|
|
pub title: Option<String>,
|
|
/// Creation date as Unix seconds (UTC); `None` = now (native) / omitted (wasm). PDF/A needs a date.
|
|
pub created: Option<i64>,
|
|
}
|
|
|
|
impl Default for PdfOptions {
|
|
fn default() -> Self {
|
|
Self { artboards: None, compatibility: Compatibility::Pdf17, compress: true, title: None, created: None }
|
|
}
|
|
}
|
|
|
|
/// Import options.
|
|
#[derive(Clone, Debug)]
|
|
pub struct ImportOptions {
|
|
/// Import at most this many pages (from the first); `None` = all pages.
|
|
pub max_pages: Option<usize>,
|
|
/// Horizontal gap in points between the artboards created for consecutive pages.
|
|
pub artboard_gap: f64,
|
|
}
|
|
|
|
impl Default for ImportOptions {
|
|
fn default() -> Self {
|
|
Self { max_pages: None, artboard_gap: 36.0 }
|
|
}
|
|
}
|
|
|
|
/// Result of an import with non-fatal warnings (unsupported features, skipped content).
|
|
#[derive(Clone, Debug)]
|
|
pub struct ImportReport {
|
|
pub document: Document,
|
|
pub warnings: Vec<String>,
|
|
}
|
|
|
|
/// Result of an export with non-fatal warnings (features approximated or dropped).
|
|
#[derive(Clone, Debug)]
|
|
pub struct ExportReport {
|
|
pub bytes: Vec<u8>,
|
|
pub warnings: Vec<String>,
|
|
}
|
|
|
|
#[derive(Debug, thiserror::Error, PartialEq)]
|
|
pub enum PdfError {
|
|
#[error("the document has no artboards")]
|
|
NoArtboards,
|
|
#[error("artboard {0} does not exist")]
|
|
BadArtboard(usize),
|
|
#[error("unsupported: {0}")]
|
|
Unsupported(String),
|
|
#[error("PDF writer error: {0}")]
|
|
Write(String),
|
|
#[error("cannot read PDF: {0}")]
|
|
Parse(String),
|
|
#[error("the PDF has no pages")]
|
|
NoPages,
|
|
}
|
|
|
|
#[cfg(test)]
|
|
mod tests;
|
|
#[cfg(test)]
|
|
mod tests_blend;
|
|
#[cfg(test)]
|
|
mod tests_dashalign;
|
|
#[cfg(test)]
|
|
mod tests_fx;
|
|
#[cfg(test)]
|
|
mod tests_stroke;
|
|
#[cfg(test)]
|
|
mod tests_strokeout;
|