mirror of
https://github.com/storytold/vectorcraft.git
synced 2026-10-27 03:06:57 -06:00
bflatasticandClaude Opus 5.5
0bdce8c633
Legacy PostScript .ai files (Illustrator 3-8, and their EPS) open through the EPS interpreter, which only recorded what was drawn: every group came in flattened. In a file in Illustrator's format (its %AI comments, or Illustrator named as the creator) the `u` ... `U` it writes at the top level now open and close groups, whatever its prolog defines them as, so groups come in nested as they were, between and inside clipping groups. clipnest's Clip carries an optional region: without one it is a plain group, nested in the same chain as the clips (ids given in opening order, so a chain of clips and groups sorts by id). Clips nested without end used to nest clipping groups past the stack (a stack overflow in EPS and EMF/WMF import): clips and groups now nest at most 128 deep with a warning, and each object's chain counts against the EPS reader's drawing budget. PDF-compatible .ai (Illustrator 9+) can't get the same: its PDF content draws each object on its own and doesn't mark plain groups (only layers, clipping groups and groups with opacity, blending or a mask, which already come back); the groups live only in the private data, which is out of scope. Documented in ROADMAP and docs/mcp.md. Addresses Discord feedback. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
895 lines
31 KiB
Rust
895 lines
31 KiB
Rust
//! The metafile reader: the format parsers (`emf`, `wmf`) play their records on a [`Player`], a
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//! small model of the device context they draw into (objects, transforms, the current position,
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//! the path bracket, the clip), which turns what they draw into document objects.
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//!
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//! Fills and strokes become paths with a fill and a stroke; lines drawn one after another with the
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//! same pen join into one path. Clips become clipping groups around what they clip. Images keep
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//! their pixels (as PNG), text becomes point type in the font the file names. Records the reader
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//! doesn't know are counted and skipped, with one warning.
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mod emf;
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mod wmf;
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use std::sync::Arc;
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use vectorcraft_color::{Color, Paint};
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use vectorcraft_doc::clipnest::{Clip, Drawn, MAX_NEST, deep_clips, nest};
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use vectorcraft_doc::{
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Appearance, AppearanceItem, CharStyle, Dash, Document, FillLayer, ImageBlob, ImageObject, Justify, LayerColor, LineCap, LineJoin, Node, NodeKind,
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StrokeLayer, TextObject,
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};
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use vectorcraft_geom::{Affine, BezPath, FillRule, PathData, PathEl, Point, Rect, Shape, Vec2, shapes};
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use crate::dib::Rgba;
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use crate::{Imported, Kind};
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/// Most objects an import makes (a hostile file can't exhaust memory with them).
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const MAX_NODES: usize = 1 << 20;
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/// Objects and clips reaching further than this from the origin (points, well inside the canvas)
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/// are left out: they come from damaged or hostile coordinates.
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const LIMIT: f64 = 1e6;
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/// Most nested saved device contexts.
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const MAX_SAVED: usize = 1024;
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/// Width of a cosmetic pen (one pixel of a 96 ppi screen), points.
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const HAIRLINE: f64 = 0.75;
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/// Curves made for arcs and ellipses are this close to the true curve (logical units are
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/// transformed after, so it is relative).
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const ARC_TOLERANCE: f64 = 0.01;
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/// Raster operations.
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pub(crate) const SRCCOPY: u32 = 0x00CC_0020;
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const PATCOPY: u32 = 0x00F0_0021;
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const WHITENESS: u32 = 0x00FF_0062;
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const BLACKNESS: u32 = 0x0000_0042;
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const SKIPPED_ROPS: &str = "images drawn with raster operations other than a plain copy (masks, inversions) were left out";
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const HATCHES: &str = "hatched brushes are filled with their colour";
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const PATTERN_BRUSHES: &str = "pattern brushes are filled grey";
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const EXCLUDED_CLIPS: &str = "clip areas cut out of the clip (excluded rectangles, differences) are ignored";
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const BAD_IMAGE: &str = "an image that couldn't be read was left out";
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const FAR_AWAY: &str = "objects far outside the picture were left out";
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/// Is `r` finite and within [`LIMIT`]?
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fn sane(r: Rect) -> bool {
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[r.x0, r.y0, r.x1, r.y1].iter().all(|v| v.is_finite() && v.abs() <= LIMIT)
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}
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/// A pen: its style flags (`PS_*`), width in logical units, colour and dash entries.
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#[derive(Clone, Debug, PartialEq)]
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pub(crate) struct PenObj {
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pub style: u32,
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pub width: f64,
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pub color: [u8; 3],
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/// PS_USERSTYLE entries, logical units.
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pub entries: Vec<f64>,
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}
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impl PenObj {
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pub const NULL: PenObj = PenObj { style: PS_NULL, width: 0.0, color: [0; 3], entries: vec![] };
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pub fn solid(color: [u8; 3]) -> Self {
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Self { style: 0, width: 0.0, color, entries: vec![] }
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}
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}
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pub(crate) const PS_NULL: u32 = 5;
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const PS_GEOMETRIC: u32 = 0x0001_0000;
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/// A brush.
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#[derive(Clone, Debug, PartialEq)]
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pub(crate) enum BrushObj {
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Null,
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Solid([u8; 3]),
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Hatched([u8; 3]),
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/// A bitmap pattern (written grey).
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Pattern,
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}
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impl BrushObj {
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/// From a LOGBRUSH's style and colour.
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pub fn from_log(style: u32, color: [u8; 3]) -> Self {
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match style {
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0 => Self::Solid(color),
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1 => Self::Null,
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2 => Self::Hatched(color),
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_ => Self::Pattern,
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}
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}
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}
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/// A font: its height in logical units (negative: the character height, positive: the cell
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/// height), escapement (tenths of a degree), weight, italics and face.
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#[derive(Clone, Debug, Default, PartialEq)]
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pub(crate) struct FontObj {
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pub height: f64,
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pub escapement: f64,
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pub weight: i32,
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pub italic: bool,
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pub face: String,
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}
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/// A GDI object.
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#[derive(Clone, Debug)]
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pub(crate) enum Obj {
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Pen(PenObj),
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Brush(BrushObj),
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Font(FontObj),
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/// Palettes, regions, colour spaces: they take a slot but don't change the drawing.
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Other,
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}
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/// The state records change, saved and restored as a whole.
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#[derive(Clone, Debug)]
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struct Dc {
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pen: PenObj,
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brush: BrushObj,
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font: FontObj,
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text_color: [u8; 3],
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text_align: u32,
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fill_rule: FillRule,
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miter: f64,
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/// Arcs run counterclockwise (the default).
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arc_ccw: bool,
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/// Logical → page (EMF world transform).
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world: Affine,
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map_mode: u32,
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win_org: Vec2,
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win_ext: Vec2,
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vp_org: Vec2,
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vp_ext: Vec2,
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clips: Vec<Arc<Clip>>,
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}
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impl Default for Dc {
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fn default() -> Self {
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Self {
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pen: PenObj::solid([0; 3]),
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brush: BrushObj::Solid([255; 3]),
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font: FontObj::default(),
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text_color: [0; 3],
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text_align: 0,
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fill_rule: FillRule::EvenOdd,
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miter: 10.0,
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arc_ccw: true,
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world: Affine::IDENTITY,
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map_mode: 1,
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win_org: Vec2::ZERO,
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win_ext: Vec2::new(1.0, 1.0),
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vp_org: Vec2::ZERO,
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vp_ext: Vec2::new(1.0, 1.0),
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clips: vec![],
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}
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}
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}
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/// How an arc closes.
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#[derive(Clone, Copy, PartialEq, Eq)]
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pub(crate) enum ArcKind {
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Open,
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Chord,
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Pie,
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}
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pub(crate) struct Player {
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kind: Kind,
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/// Device units (EMF) or logical units (WMF) → document points.
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dev_to_doc: Affine,
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/// Millimetres per device pixel (EMF's fixed mapping modes).
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mm_per_px: f64,
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dc: Dc,
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saved: Vec<Dc>,
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objects: Vec<Option<Obj>>,
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/// The lowest object slot that may be free (WMF numbering).
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free_hint: usize,
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/// The path being recorded (document space), whether a figure is open in it and where that
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/// figure started (logical).
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path: Option<BezPath>,
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figure: bool,
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figure_start: Point,
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/// The artboard (document space): clips holding all of it clip nothing worth keeping.
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frame: Rect,
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/// The current position (logical).
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pos: Point,
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/// Lines drawn one after another outside a path bracket, not drawn yet.
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pending: BezPath,
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out: Drawn,
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doc: Document,
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warnings: Vec<String>,
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skipped: usize,
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next_clip: u32,
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/// The file holds EMF+ records (which aren't read).
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pub emf_plus: bool,
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}
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fn rgb(c: [u8; 3]) -> Paint {
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Paint::solid(Color::rgb8(c[0], c[1], c[2]))
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}
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/// The arc of the ellipse in `r` from the ray through `start` to the ray through `end`.
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pub(crate) fn arc_path(r: Rect, start: Point, end: Point, ccw: bool, kind: ArcKind) -> BezPath {
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let r = r.abs();
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let c = r.center();
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let radii = Vec2::new(r.width() / 2.0, r.height() / 2.0);
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let mut bp = BezPath::new();
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if radii.x <= 0.0 || radii.y <= 0.0 {
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return bp;
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}
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let angle = |p: Point| ((p.y - c.y) / radii.y).atan2((p.x - c.x) / radii.x);
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let (a0, a1) = (angle(start), angle(end));
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let tau = std::f64::consts::TAU;
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// Counterclockwise on a y-down device is towards smaller angles.
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let sweep = if ccw {
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let s = (a0 - a1).rem_euclid(tau);
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-(if s == 0.0 { tau } else { s })
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} else {
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let s = (a1 - a0).rem_euclid(tau);
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if s == 0.0 { tau } else { s }
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};
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let arc = kurbo::Arc { center: c, radii, start_angle: a0, sweep_angle: sweep, x_rotation: 0.0 };
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let tol = ARC_TOLERANCE * radii.x.max(radii.y).max(1e-9);
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if kind == ArcKind::Pie {
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bp.move_to(c);
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let first = c + Vec2::new(radii.x * a0.cos(), radii.y * a0.sin());
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bp.line_to(first);
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arc.append_iter(tol).for_each(|el| bp.push(el));
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} else {
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kurbo::Shape::path_elements(&arc, tol).for_each(|el| bp.push(el));
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}
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if kind != ArcKind::Open {
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bp.close_path();
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}
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bp
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}
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/// A rectangle with elliptical corners `rx` × `ry`.
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pub(crate) fn round_rect(r: Rect, rx: f64, ry: f64) -> BezPath {
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let r = r.abs();
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let (rx, ry) = ((rx / 2.0).abs().min(r.width() / 2.0), (ry / 2.0).abs().min(r.height() / 2.0));
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if rx <= 0.0 || ry <= 0.0 {
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return shapes::rectangle(r).to_bezpath();
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}
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// A rectangle with round corners of radius `ry`, squeezed across.
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let s = ry / rx;
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let squeezed = Rect::new(r.x0 * s, r.y0, r.x1 * s, r.y1);
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let mut bp = shapes::rounded_rectangle(squeezed, ry).to_bezpath();
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bp.apply_affine(Affine::scale_non_uniform(1.0 / s, 1.0));
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bp
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}
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impl Player {
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fn new(kind: Kind, dev_to_doc: Affine, mm_per_px: f64, artboard: Rect) -> Self {
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let side = |v: f64| if v.is_finite() { v.clamp(1.0, LIMIT) } else { 1.0 };
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let (w, h) = (side(artboard.width()), side(artboard.height()));
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let mut doc = Document::new(w, h);
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doc.layers.clear();
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Self {
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kind,
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dev_to_doc,
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mm_per_px,
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dc: Dc::default(),
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saved: vec![],
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objects: vec![],
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free_hint: 0,
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path: None,
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figure: false,
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figure_start: Point::ZERO,
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frame: artboard,
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pos: Point::ZERO,
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pending: BezPath::new(),
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out: vec![],
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doc,
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warnings: vec![],
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skipped: 0,
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next_clip: 0,
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emf_plus: false,
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}
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}
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pub fn warn(&mut self, w: &str) {
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if !self.warnings.iter().any(|x| x == w) {
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self.warnings.push(w.to_string());
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}
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}
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/// A record of a kind the reader doesn't know.
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pub fn skip(&mut self) {
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self.skipped += 1;
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}
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// ---------- mapping ----------
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/// Logical → document.
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fn xf(&self) -> Affine {
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if self.kind == Kind::Wmf {
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return self.dev_to_doc;
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}
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let d = &self.dc;
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let page_to_dev = match d.map_mode {
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// Fixed modes: millimetres a unit, y up.
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2..=6 => {
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let mm = [0.1, 0.01, 0.254, 0.0254, 25.4 / 1440.0][(d.map_mode - 2) as usize];
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let s = mm / self.mm_per_px.max(1e-12);
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Affine::translate(d.vp_org) * Affine::scale_non_uniform(s, -s) * Affine::translate(-d.win_org)
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}
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7 | 8 => {
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let ratio = |v: f64, w: f64| if w.abs() > 1e-12 && v.is_finite() { v / w } else { 1.0 };
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let (mut sx, mut sy) = (ratio(d.vp_ext.x, d.win_ext.x), ratio(d.vp_ext.y, d.win_ext.y));
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if d.map_mode == 7 {
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// Isotropic: the same scale both ways, the smaller one.
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let s = sx.abs().min(sy.abs());
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(sx, sy) = (s.copysign(sx), s.copysign(sy));
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}
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Affine::translate(d.vp_org) * Affine::scale_non_uniform(sx, sy) * Affine::translate(-d.win_org)
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}
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_ => Affine::translate(d.vp_org - d.win_org),
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};
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self.dev_to_doc * page_to_dev * d.world
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}
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/// How much logical lengths grow in the document.
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fn scale(&self) -> f64 {
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let s = self.xf().determinant().abs().sqrt();
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if s.is_finite() { s } else { 0.0 }
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}
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pub fn set_map_mode(&mut self, m: u32) {
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self.dc.map_mode = m;
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}
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pub fn set_window_org(&mut self, x: f64, y: f64) {
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self.dc.win_org = Vec2::new(x, y);
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}
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pub fn set_window_ext(&mut self, x: f64, y: f64) {
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self.dc.win_ext = Vec2::new(x, y);
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}
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pub fn set_viewport_org(&mut self, x: f64, y: f64) {
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self.dc.vp_org = Vec2::new(x, y);
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}
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pub fn set_viewport_ext(&mut self, x: f64, y: f64) {
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self.dc.vp_ext = Vec2::new(x, y);
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}
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pub fn scale_ext(&mut self, window: bool, x: (f64, f64), y: (f64, f64)) {
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let e = if window { &mut self.dc.win_ext } else { &mut self.dc.vp_ext };
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if x.1 != 0.0 && y.1 != 0.0 {
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*e = Vec2::new(e.x * x.0 / x.1, e.y * y.0 / y.1);
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}
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}
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/// `SetWorldTransform` / `ModifyWorldTransform` (`mode`: 1 identity, 2 left, 3 right, 4 set).
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pub fn world(&mut self, x: Affine, mode: u32) {
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if !x.as_coeffs().iter().all(|v| v.is_finite()) {
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return;
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}
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self.dc.world = match mode {
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1 => Affine::IDENTITY,
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2 => self.dc.world * x,
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3 => x * self.dc.world,
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_ => x,
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};
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}
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// ---------- state ----------
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pub fn set_fill_mode(&mut self, alternate: bool) {
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self.dc.fill_rule = if alternate { FillRule::EvenOdd } else { FillRule::NonZero };
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}
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pub fn set_miter(&mut self, m: f64) {
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if m.is_finite() && m >= 1.0 {
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self.dc.miter = m;
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}
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}
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pub fn set_arc_ccw(&mut self, ccw: bool) {
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self.dc.arc_ccw = ccw;
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}
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pub fn set_text_color(&mut self, c: [u8; 3]) {
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self.dc.text_color = c;
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}
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pub fn set_text_align(&mut self, a: u32) {
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self.dc.text_align = a;
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}
|
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pub fn save(&mut self) {
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if self.saved.len() < MAX_SAVED {
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self.saved.push(self.dc.clone());
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}
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}
|
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/// `RestoreDC(n)`: a negative `n` counts back from the latest save, a positive one is a save's
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/// number.
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pub fn restore(&mut self, n: i32) {
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let len = self.saved.len();
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let keep = if n < 0 { len.checked_sub(n.unsigned_abs() as usize) } else { (n as usize).checked_sub(1).filter(|k| *k < len) };
|
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if let Some(k) = keep {
|
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self.saved.truncate(k + 1);
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if let Some(dc) = self.saved.pop() {
|
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self.dc = dc;
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}
|
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}
|
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}
|
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|
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// ---------- objects ----------
|
||
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/// Put `obj` in slot `index` (EMF numbers its objects).
|
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pub fn create_at(&mut self, index: u32, obj: Obj) {
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let i = index as usize;
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if i == 0 || i > u16::MAX as usize {
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return;
|
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}
|
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if self.objects.len() <= i {
|
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self.objects.resize(i + 1, None);
|
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}
|
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if let Some(s) = self.objects.get_mut(i) {
|
||
*s = Some(obj);
|
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}
|
||
}
|
||
|
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/// Put `obj` in the lowest free slot (WMF).
|
||
pub fn create(&mut self, obj: Obj) {
|
||
let start = self.free_hint.min(self.objects.len());
|
||
let i = self.objects.iter().skip(start).position(Option::is_none).map_or(self.objects.len(), |p| p + start);
|
||
if i > u16::MAX as usize {
|
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return;
|
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}
|
||
if i == self.objects.len() {
|
||
self.objects.push(None);
|
||
}
|
||
if let Some(s) = self.objects.get_mut(i) {
|
||
*s = Some(obj);
|
||
}
|
||
self.free_hint = i + 1;
|
||
}
|
||
|
||
pub fn delete(&mut self, index: u32) {
|
||
if let Some(s) = self.objects.get_mut(index as usize) {
|
||
*s = None;
|
||
self.free_hint = self.free_hint.min(index as usize);
|
||
}
|
||
}
|
||
|
||
/// Select object `index`, or a stock object (EMF: the high bit set).
|
||
pub fn select(&mut self, index: u32) {
|
||
if self.kind == Kind::Emf && index & 0x8000_0000 != 0 {
|
||
match index & 0x7fff_ffff {
|
||
0 | 18 => self.dc.brush = BrushObj::Solid([255; 3]),
|
||
1 => self.dc.brush = BrushObj::Solid([0xc0; 3]),
|
||
2 => self.dc.brush = BrushObj::Solid([0x80; 3]),
|
||
3 => self.dc.brush = BrushObj::Solid([0x40; 3]),
|
||
4 => self.dc.brush = BrushObj::Solid([0; 3]),
|
||
5 => self.dc.brush = BrushObj::Null,
|
||
6 => self.dc.pen = PenObj::solid([255; 3]),
|
||
7 | 19 => self.dc.pen = PenObj::solid([0; 3]),
|
||
8 => self.dc.pen = PenObj::NULL,
|
||
10..=17 => self.dc.font = FontObj::default(),
|
||
_ => {}
|
||
}
|
||
return;
|
||
}
|
||
match self.objects.get(index as usize).cloned().flatten() {
|
||
Some(Obj::Pen(p)) => self.dc.pen = p,
|
||
Some(Obj::Brush(b)) => self.dc.brush = b,
|
||
Some(Obj::Font(f)) => self.dc.font = f,
|
||
_ => {}
|
||
}
|
||
}
|
||
|
||
// ---------- output ----------
|
||
|
||
fn push(&mut self, mut node: Node) {
|
||
if self.out.len() >= MAX_NODES {
|
||
return;
|
||
}
|
||
if !node.visual_bounds().is_none_or(sane) {
|
||
return self.warn(FAR_AWAY);
|
||
}
|
||
node.id = self.doc.alloc_id();
|
||
self.out.push((self.dc.clips.clone(), node));
|
||
}
|
||
|
||
fn fill_paint(&mut self) -> Option<Paint> {
|
||
match self.dc.brush.clone() {
|
||
BrushObj::Null => None,
|
||
BrushObj::Solid(c) => Some(rgb(c)),
|
||
BrushObj::Hatched(c) => {
|
||
self.warn(HATCHES);
|
||
Some(rgb(c))
|
||
}
|
||
BrushObj::Pattern => {
|
||
self.warn(PATTERN_BRUSHES);
|
||
Some(rgb([0x80; 3]))
|
||
}
|
||
}
|
||
}
|
||
|
||
fn stroke_layer(&self) -> Option<StrokeLayer> {
|
||
let p = &self.dc.pen;
|
||
let kind = p.style & 0xf;
|
||
if kind == PS_NULL {
|
||
return None;
|
||
}
|
||
// Geometric pens, and other pens wider than 1, have a width in logical units; the others
|
||
// are one pixel wide.
|
||
let w = p.width * self.scale();
|
||
let width = if w > 0.0 && w.is_finite() && (p.style & PS_GEOMETRIC != 0 || p.width > 1.0) { w } else { HAIRLINE };
|
||
let mut st = StrokeLayer::new(rgb(p.color), width);
|
||
// Round caps and joins unless the style asks for others.
|
||
st.cap = match p.style & 0xf00 {
|
||
0x100 => LineCap::Square,
|
||
0x200 => LineCap::Butt,
|
||
_ => LineCap::Round,
|
||
};
|
||
st.join = match p.style & 0xf000 {
|
||
0x1000 => LineJoin::Bevel,
|
||
0x2000 => LineJoin::Miter,
|
||
_ => LineJoin::Round,
|
||
};
|
||
st.miter_limit = self.dc.miter;
|
||
let unit = width.max(HAIRLINE);
|
||
let pattern: Vec<f64> = match kind {
|
||
1 => vec![3.0 * unit, unit],
|
||
2 => vec![unit, unit],
|
||
3 => vec![3.0 * unit, unit, unit, unit],
|
||
4 => vec![3.0 * unit, unit, unit, unit, unit, unit],
|
||
7 => p.entries.iter().map(|e| e * self.scale()).collect(),
|
||
_ => vec![],
|
||
};
|
||
let dash = Dash { pattern, offset: 0.0, align_corners: false };
|
||
st.dash = dash.is_dashed().then_some(dash);
|
||
Some(st)
|
||
}
|
||
|
||
/// Paint `bp` (document space) with the brush and the pen.
|
||
fn draw(&mut self, bp: BezPath, fill: bool, stroke: bool) {
|
||
if bp.elements().is_empty() {
|
||
return;
|
||
}
|
||
let mut items = vec![];
|
||
if fill && let Some(p) = self.fill_paint() {
|
||
items.push(AppearanceItem::Fill(FillLayer::new(p)));
|
||
}
|
||
if stroke && let Some(st) = self.stroke_layer() {
|
||
items.push(AppearanceItem::Stroke(st));
|
||
}
|
||
if items.is_empty() {
|
||
return;
|
||
}
|
||
let mut n = Node::path(vectorcraft_doc::NodeId(0), PathData::from_bezpath(&bp), Appearance { items, ..Appearance::default() });
|
||
if let NodeKind::Path { rule, .. } = &mut n.kind {
|
||
*rule = self.dc.fill_rule;
|
||
}
|
||
self.push(n);
|
||
}
|
||
|
||
/// Draw the lines drawn one after another so far.
|
||
pub fn flush(&mut self) {
|
||
if !self.pending.elements().is_empty() {
|
||
let bp = std::mem::take(&mut self.pending);
|
||
self.draw(bp, false, true);
|
||
}
|
||
}
|
||
|
||
/// A figure in logical units: added to the path being recorded, else drawn (filled when it is
|
||
/// an area).
|
||
pub fn figure(&mut self, mut bp: BezPath, area: bool) {
|
||
bp.apply_affine(self.xf());
|
||
match &mut self.path {
|
||
Some(path) => {
|
||
path.extend(bp);
|
||
self.figure = false;
|
||
}
|
||
None => self.draw(bp, area, true),
|
||
}
|
||
}
|
||
|
||
/// Polygon / Polyline (and Bézier ones): `pts` in logical units.
|
||
pub fn poly(&mut self, pts: &[Point], closed: bool, bezier: bool) {
|
||
let Some((first, rest)) = pts.split_first() else { return };
|
||
let mut bp = BezPath::new();
|
||
bp.move_to(*first);
|
||
if bezier {
|
||
for c in rest.as_chunks::<3>().0 {
|
||
bp.curve_to(c[0], c[1], c[2]);
|
||
}
|
||
} else {
|
||
rest.iter().for_each(|p| bp.line_to(*p));
|
||
}
|
||
if closed {
|
||
bp.close_path();
|
||
}
|
||
self.figure(bp, closed);
|
||
}
|
||
|
||
/// Several polygons (one area) or polylines.
|
||
pub fn poly_poly(&mut self, polys: &[Vec<Point>], closed: bool) {
|
||
let mut bp = BezPath::new();
|
||
for p in polys {
|
||
let Some((first, rest)) = p.split_first() else { continue };
|
||
bp.move_to(*first);
|
||
rest.iter().for_each(|q| bp.line_to(*q));
|
||
if closed {
|
||
bp.close_path();
|
||
}
|
||
}
|
||
self.figure(bp, closed);
|
||
}
|
||
|
||
pub fn move_to(&mut self, p: Point) {
|
||
self.pos = p;
|
||
self.figure = false;
|
||
}
|
||
|
||
/// LineTo / PolylineTo / PolyBezierTo: from the current position through `pts` (logical).
|
||
pub fn poly_to(&mut self, pts: &[Point], bezier: bool) {
|
||
let Some(last) = pts.last().copied() else { return };
|
||
let xf = self.xf();
|
||
let start = xf * self.pos;
|
||
let target = match &mut self.path {
|
||
Some(path) => {
|
||
if !self.figure {
|
||
path.move_to(start);
|
||
self.figure = true;
|
||
self.figure_start = self.pos;
|
||
}
|
||
path
|
||
}
|
||
None => {
|
||
if self.pending.elements().last().and_then(|e| e.end_point()) != Some(start) {
|
||
self.pending.move_to(start);
|
||
}
|
||
&mut self.pending
|
||
}
|
||
};
|
||
if bezier {
|
||
for c in pts.as_chunks::<3>().0 {
|
||
target.curve_to(xf * c[0], xf * c[1], xf * c[2]);
|
||
}
|
||
} else {
|
||
pts.iter().for_each(|p| target.line_to(xf * *p));
|
||
}
|
||
self.pos = last;
|
||
}
|
||
|
||
pub fn arc(&mut self, r: Rect, start: Point, end: Point, kind: ArcKind) {
|
||
let bp = arc_path(r, start, end, self.dc.arc_ccw, kind);
|
||
self.figure(bp, kind != ArcKind::Open);
|
||
}
|
||
|
||
// ---------- paths and clips ----------
|
||
|
||
pub fn begin_path(&mut self) {
|
||
self.path = Some(BezPath::new());
|
||
self.figure = false;
|
||
}
|
||
pub fn end_path(&mut self) {
|
||
// The path stays until it is filled, stroked or made the clip.
|
||
}
|
||
pub fn close_figure(&mut self) {
|
||
if let Some(p) = &mut self.path
|
||
&& self.figure
|
||
{
|
||
p.close_path();
|
||
self.figure = false;
|
||
self.pos = self.figure_start;
|
||
}
|
||
}
|
||
pub fn abort_path(&mut self) {
|
||
self.path = None;
|
||
}
|
||
|
||
/// FillPath / StrokePath / StrokeAndFillPath.
|
||
pub fn paint_path(&mut self, fill: bool, stroke: bool) {
|
||
if let Some(mut bp) = self.path.take() {
|
||
// Filling closes the open figure.
|
||
if fill && self.figure {
|
||
bp.close_path();
|
||
}
|
||
self.draw(bp, fill, stroke);
|
||
}
|
||
}
|
||
|
||
fn push_clip(&mut self, path: BezPath, rule: FillRule, replace: bool) {
|
||
if replace {
|
||
self.dc.clips.clear();
|
||
}
|
||
if !sane(path.bounding_box()) {
|
||
return self.warn(FAR_AWAY);
|
||
}
|
||
// A rectangle around the whole picture (what writers clip to first) clips nothing in it.
|
||
let lines = path.elements().iter().all(|e| !matches!(e, PathEl::QuadTo(..) | PathEl::CurveTo(..)));
|
||
let around = path.bounding_box().inflate(0.5, 0.5);
|
||
if lines && path.elements().len() <= 6 && around.contains(self.frame.origin()) && around.contains(Point::new(self.frame.x1, self.frame.y1)) {
|
||
return;
|
||
}
|
||
if self.dc.clips.len() >= MAX_NEST {
|
||
return self.warn(&deep_clips());
|
||
}
|
||
self.next_clip += 1;
|
||
self.dc.clips.push(Arc::new(Clip { id: self.next_clip, region: Some((path, rule)) }));
|
||
}
|
||
|
||
/// SelectClipPath (`mode`: 1 and, 5 copy; the others cut out, which isn't read).
|
||
pub fn clip_path(&mut self, mode: u32) {
|
||
let Some(bp) = self.path.take() else { return };
|
||
match mode {
|
||
1 => self.push_clip(bp, self.dc.fill_rule, false),
|
||
5 => self.push_clip(bp, self.dc.fill_rule, true),
|
||
_ => self.warn(EXCLUDED_CLIPS),
|
||
}
|
||
}
|
||
|
||
/// IntersectClipRect (logical units).
|
||
pub fn clip_rect(&mut self, r: Rect) {
|
||
let mut bp = shapes::rectangle(r.abs()).to_bezpath();
|
||
bp.apply_affine(self.xf());
|
||
self.push_clip(bp, FillRule::NonZero, false);
|
||
}
|
||
|
||
/// A clip region of `rects` in device units (`mode` as [`Self::clip_path`]); none with mode
|
||
/// copy removes the clip.
|
||
pub fn clip_region(&mut self, rects: &[Rect], mode: u32) {
|
||
if rects.is_empty() {
|
||
if mode == 5 {
|
||
self.dc.clips.clear();
|
||
}
|
||
return;
|
||
}
|
||
let mut bp = BezPath::new();
|
||
for r in rects {
|
||
bp.extend(shapes::rectangle(r.abs()).to_bezpath());
|
||
}
|
||
bp.apply_affine(self.dev_to_doc);
|
||
match mode {
|
||
1 => self.push_clip(bp, FillRule::NonZero, false),
|
||
5 => self.push_clip(bp, FillRule::NonZero, true),
|
||
_ => self.warn(EXCLUDED_CLIPS),
|
||
}
|
||
}
|
||
|
||
pub fn exclude_clip(&mut self) {
|
||
self.warn(EXCLUDED_CLIPS);
|
||
}
|
||
|
||
// ---------- blits, images and text ----------
|
||
|
||
/// A raster operation without a source over `dest` (logical): the brush, white or black.
|
||
pub fn pattern_blit(&mut self, dest: Rect, rop: u32) {
|
||
let brush = match rop {
|
||
PATCOPY => self.dc.brush.clone(),
|
||
WHITENESS => BrushObj::Solid([255; 3]),
|
||
BLACKNESS => BrushObj::Solid([0; 3]),
|
||
_ => return self.skip(),
|
||
};
|
||
let pen = std::mem::replace(&mut self.dc.pen, PenObj::NULL);
|
||
let outer = std::mem::replace(&mut self.dc.brush, brush);
|
||
let mut bp = shapes::rectangle(dest.abs()).to_bezpath();
|
||
bp.apply_affine(self.xf());
|
||
self.draw(bp, true, false);
|
||
self.dc.pen = pen;
|
||
self.dc.brush = outer;
|
||
}
|
||
|
||
/// An image whose source rectangle `src` (pixels, from the top-left) is drawn into `dest`
|
||
/// (logical: origin and signed size) with raster operation `rop`, at `opacity`.
|
||
pub fn image(&mut self, img: Result<Rgba, String>, src: Rect, dest: Rect, rop: u32, opacity: f64) {
|
||
if rop != SRCCOPY {
|
||
self.warn(SKIPPED_ROPS);
|
||
return;
|
||
}
|
||
let img = match img {
|
||
Ok(i) => i,
|
||
Err(_) => return self.warn(BAD_IMAGE),
|
||
};
|
||
let img = crop(img, src);
|
||
if img.width == 0 || img.height == 0 {
|
||
return;
|
||
}
|
||
let Ok(png) = img.to_png() else { return self.warn(BAD_IMAGE) };
|
||
let blob = ImageBlob::new("image/png", png);
|
||
let key = blob.content_key();
|
||
self.doc.images.entry(key.clone()).or_insert(blob);
|
||
let (w, h) = (f64::from(img.width), f64::from(img.height));
|
||
let xf = self.xf() * Affine::translate((dest.x0, dest.y0)) * Affine::scale_non_uniform(dest.width() / w, dest.height() / h);
|
||
if !xf.as_coeffs().iter().all(|v| v.is_finite()) || xf.determinant().abs() < 1e-12 {
|
||
return;
|
||
}
|
||
let im = ImageObject { key, width: img.width, height: img.height, xf, link: None, placement: Default::default() };
|
||
let mut n = Node::new(vectorcraft_doc::NodeId(0), NodeKind::Image(im));
|
||
n.opacity = opacity.clamp(0.0, 1.0) as f32;
|
||
self.push(n);
|
||
}
|
||
|
||
/// Text at `at` (logical; the current position with TA_UPDATECP) in the current font.
|
||
pub fn text(&mut self, at: Point, s: &str) {
|
||
let s: String = s.chars().filter(|c| *c != '\0').collect();
|
||
if s.trim().is_empty() {
|
||
return;
|
||
}
|
||
let align = self.dc.text_align;
|
||
let at = if align & 1 != 0 { self.pos } else { at };
|
||
let f = self.dc.font.clone();
|
||
let k = self.scale();
|
||
// A negative height is the em; a positive one the cell (the em and the internal leading).
|
||
let em = if f.height < 0.0 { -f.height } else { f.height * 0.85 };
|
||
let size = if em > 0.0 && (em * k).is_finite() { (em * k).clamp(0.5, 5000.0) } else { 12.0 };
|
||
let mut style = CharStyle { size, fill: rgb(self.dc.text_color), stroke: Paint::None, ..CharStyle::default() };
|
||
if !f.face.trim().is_empty() {
|
||
style.font_family = f.face.trim().to_string();
|
||
}
|
||
style.font_style = match (f.weight >= 600, f.italic) {
|
||
(true, true) => "Bold Italic",
|
||
(true, false) => "Bold",
|
||
(false, true) => "Italic",
|
||
(false, false) => "Regular",
|
||
}
|
||
.into();
|
||
let angle = -(f.escapement / 10.0).to_radians();
|
||
let angle = if angle.is_finite() { angle } else { 0.0 };
|
||
// TA_BASELINE, TA_BOTTOM or TA_TOP (the default): where the baseline is.
|
||
let drop = match align & 0x18 {
|
||
0x18 => 0.0,
|
||
0x08 => -0.2 * size,
|
||
_ => 0.8 * size,
|
||
};
|
||
let origin = self.xf() * at;
|
||
let mut t = TextObject::point(Point::ZERO, &s, style);
|
||
t.xf = Affine::translate(origin.to_vec2()) * Affine::rotate(angle) * Affine::translate((0.0, drop));
|
||
t.para.justify = match align & 0x06 {
|
||
0x06 => Justify::Center,
|
||
0x02 => Justify::Right,
|
||
_ => Justify::Left,
|
||
};
|
||
t.cached_bounds = Some(vectorcraft_text::layout(vectorcraft_text::FontDb::global(), &t).bounds);
|
||
self.push(Node::new(vectorcraft_doc::NodeId(0), NodeKind::Text(Box::new(t))));
|
||
}
|
||
|
||
// ---------- the document ----------
|
||
|
||
/// The document: what was drawn on one layer, clipped art in clipping groups.
|
||
fn finish(mut self) -> Imported {
|
||
self.flush();
|
||
if self.skipped > 0 {
|
||
let n = self.skipped;
|
||
self.warnings.push(format!(
|
||
"{n} record{} of kinds VectorCraft doesn't read {} skipped",
|
||
if n == 1 { "" } else { "s" },
|
||
if n == 1 { "was" } else { "were" }
|
||
));
|
||
}
|
||
let out = std::mem::take(&mut self.out);
|
||
if out.is_empty() && self.emf_plus {
|
||
self.warnings.push("the picture is drawn with EMF+ records, which aren't read yet: nothing was imported".into());
|
||
}
|
||
let children = nest(&mut self.doc, out);
|
||
let mut layer = Node::layer(self.doc.alloc_id(), "Layer 1", LayerColor::Preset(0));
|
||
if let Some(c) = layer.children_mut() {
|
||
*c = children;
|
||
}
|
||
self.doc.layers = vec![Arc::new(layer)];
|
||
Imported { document: self.doc, kind: self.kind, warnings: self.warnings }
|
||
}
|
||
}
|
||
|
||
/// `img` cut to `src` (pixels from the top-left, within the image).
|
||
fn crop(img: Rgba, src: Rect) -> Rgba {
|
||
let (w, h) = (img.width, img.height);
|
||
let s = src.abs();
|
||
let clamp = |v: f64, max: u32| if v.is_finite() { v.round().clamp(0.0, f64::from(max)) as u32 } else { 0 };
|
||
let (x0, y0, x1, y1) = (clamp(s.x0, w), clamp(s.y0, h), clamp(s.x1, w), clamp(s.y1, h));
|
||
if (x0, y0, x1, y1) == (0, 0, w, h) || x1 <= x0 || y1 <= y0 {
|
||
return img;
|
||
}
|
||
let mut pixels = Vec::with_capacity(((x1 - x0) * (y1 - y0) * 4) as usize);
|
||
for y in y0..y1 {
|
||
let row = (y * w) as usize * 4;
|
||
if let Some(p) = img.pixels.get(row + x0 as usize * 4..row + x1 as usize * 4) {
|
||
pixels.extend_from_slice(p);
|
||
}
|
||
}
|
||
Rgba { width: x1 - x0, height: y1 - y0, pixels }
|
||
}
|
||
|
||
/// Read a metafile.
|
||
pub(crate) fn import(bytes: &[u8]) -> Result<Imported, String> {
|
||
match crate::sniff(bytes) {
|
||
Some(Kind::Emf) => emf::play(bytes),
|
||
Some(Kind::Wmf) => wmf::play(bytes),
|
||
None => Err("not an EMF or WMF file".into()),
|
||
}
|
||
}
|