1477 lines
63 KiB
Rust
1477 lines
63 KiB
Rust
//! VectorCraft renderer: document → premultiplied RGBA pixels.
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//!
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//! The backend is `vello_cpu` (SIMD, sparse strips). Callers give a *view transform* mapping
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//! document points to output pixels; the renderer culls by bounds, evaluates appearance stacks
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//! (multiple fills/strokes, opacity, blend modes, stroke alignment, dashes), clip groups,
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//! gradients, images and text (via `vectorcraft-text` glyph outlines).
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#![forbid(unsafe_code)]
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mod brush_fx;
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pub mod encode;
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mod freeform;
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mod fx;
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mod group;
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mod ink;
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mod live;
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mod paint;
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mod pattern;
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pub mod proof;
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use std::collections::HashMap;
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use std::sync::Arc;
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use vectorcraft_doc::{AppearanceItem, Document, Node, NodeId, NodeKind, StrokeAlign, StrokeLayer, TextObject};
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use vectorcraft_geom::{Affine, BezPath, FillRule, Rect, Shape};
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use vello_cpu::kurbo;
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use vello_cpu::peniko::{self, BlendMode, Compose, Mix};
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use vello_cpu::{Pixmap, RenderContext, Resources};
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use group::Composite;
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use ink::Ink;
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pub use brush_fx::instance_art;
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pub use effects::stroke::width_outline;
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pub use live::expand_live;
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pub use pattern::render_pattern_swatch;
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pub use vectorcraft_effects as effects;
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pub use vello_cpu;
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/// Largest raster an export may ask [`Renderer::render_region`] for, per side. The CPU rasteriser
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/// addresses at most `u16::MAX` pixels per side (and panics at that edge).
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pub const MAX_RASTER_SIDE: u32 = 32_768;
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/// Largest raster an export may ask for in total (16384², 1 GiB of RGBA pixels).
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pub const MAX_RASTER_PIXELS: u64 = 1 << 28;
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/// Pixel size of `region` rendered at `scale` (as [`Renderer::render_region`] rounds it), or an error
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/// when it exceeds [`MAX_RASTER_SIDE`] / [`MAX_RASTER_PIXELS`]. Raster exports check this first,
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/// because the renderer can only clamp (wrong picture) or fail (abort) at those sizes.
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pub fn raster_size(region: Rect, scale: f64) -> Result<(u32, u32), String> {
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if !(scale.is_finite() && scale > 0.0) {
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return Err(format!("invalid scale {scale}"));
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}
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let (w, h) = region_pixels(region, scale);
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if !(w <= MAX_RASTER_SIDE && h <= MAX_RASTER_SIDE && u64::from(w) * u64::from(h) <= MAX_RASTER_PIXELS) {
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return Err(format!(
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"the image would be {w} × {h} pixels; raster exports are limited to {MAX_RASTER_SIDE} pixels per side and {} megapixels: lower the scale or resolution",
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MAX_RASTER_PIXELS / 1_000_000
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));
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}
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Ok((w, h))
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}
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/// Rendering options.
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#[derive(Clone, Debug)]
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pub struct RenderOptions {
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/// Outline (wireframe) view: 1 px black paths, no paint.
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pub outline: bool,
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/// Pasteboard colour behind everything (premultiplied RGBA8); `None` = transparent.
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pub background: Option<[u8; 4]>,
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/// Draw artboards as white rectangles (screen view). Export sets this to false.
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pub artboards: bool,
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/// Objects not to draw (e.g. the object being edited by a live drag preview).
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pub hidden: Vec<NodeId>,
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/// Draw template layers dimmed (50%).
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pub dim_templates: bool,
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/// Soft proof / separations preview (see [`proof`]).
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pub proof: Option<proof::ProofSetup>,
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/// Overprint Preview (see [`proof`] for what overprints).
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pub overprint_preview: bool,
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/// Trim View: clip the artwork to the artboards (nothing on the pasteboard is drawn).
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pub trim: bool,
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/// Leave template layers out (exports and thumbnails: templates are guides, not artwork).
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pub skip_templates: bool,
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/// Pattern editing mode's tile edge and swatch bounds colour (Object → Pattern → Tile Edge
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/// Color), RGB.
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pub tile_edge: [u8; 3],
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/// View Opacity Mask (Alt-click the mask thumbnail): instead of the artwork, show this object's
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/// opacity mask alone as its coverage in greyscale (white = opaque, black = transparent).
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pub mask_view: Option<NodeId>,
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/// Screen view: highlight substituted fonts and glyphs as Document Setup asks.
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pub highlight_substitutions: bool,
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/// Edge smoothing (raster export option).
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pub anti_alias: AntiAlias,
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}
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/// How edges are rasterized (raster export option).
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#[derive(Clone, Copy, Debug, Default, PartialEq, Eq)]
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pub enum AntiAlias {
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/// Hard edges: a pixel is painted when a path, text or image covers at least half of it.
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/// Raster effects (blur, shadows, glows) and pattern tiles stay smooth.
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None,
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/// Smooth edges everywhere.
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#[default]
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Art,
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/// Smooth edges with type snapped to the pixel grid (see `TextLayout::snap_to_pixels`):
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/// crisper small text.
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Type,
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}
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impl AntiAlias {
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pub const ALL: [Self; 3] = [Self::None, Self::Art, Self::Type];
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/// The id used in command params (`none`, `art`, `type`).
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pub fn id(self) -> &'static str {
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match self {
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Self::None => "none",
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Self::Art => "art",
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Self::Type => "type",
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}
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}
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/// The mode an id names (any case).
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pub fn from_id(id: &str) -> Option<Self> {
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Self::ALL.into_iter().find(|a| a.id().eq_ignore_ascii_case(id))
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}
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/// The name shown in options dialogs.
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pub fn label(self) -> &'static str {
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match self {
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Self::None => "None",
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Self::Art => "Art Optimized",
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Self::Type => "Type Optimized",
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}
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}
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/// vello's aliasing threshold: paint a pixel only above half coverage when edges are hard.
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fn threshold(self) -> Option<u8> {
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(self == Self::None).then_some(127)
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}
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}
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impl Default for RenderOptions {
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fn default() -> Self {
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Self {
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outline: false,
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background: None,
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artboards: false,
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hidden: vec![],
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dim_templates: true,
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proof: None,
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overprint_preview: false,
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trim: false,
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skip_templates: false,
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tile_edge: vectorcraft_doc::LAYER_COLORS[0].1,
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mask_view: None,
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highlight_substitutions: false,
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anti_alias: AntiAlias::Art,
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}
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}
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}
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/// A rendered image (premultiplied RGBA8, row-major).
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pub struct Rendered {
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pub width: u32,
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pub height: u32,
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pub pixels: Vec<u8>,
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}
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impl Rendered {
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/// Un-premultiplied RGBA8 copy.
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pub fn to_straight(&self) -> Vec<u8> {
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let mut out = self.pixels.clone();
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for px in out.as_chunks_mut::<4>().0 {
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let a = px[3] as u32;
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if a != 0 && a != 255 {
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for c in &mut px[..3] {
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*c = ((*c as u32 * 255 + a / 2) / a).min(255) as u8;
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}
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}
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}
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out
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}
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/// Encode as PNG without metadata (thumbnails, screenshots, embedded rasters; exports use
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/// [`encode`]).
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pub fn to_png(&self) -> Result<Vec<u8>, String> {
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let mut buf = Vec::new();
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let img = image::RgbaImage::from_raw(self.width, self.height, self.to_straight())
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.ok_or("PNG encoding failed: pixel buffer doesn't match the image size")?;
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img.write_to(&mut std::io::Cursor::new(&mut buf), image::ImageFormat::Png).map_err(|e| format!("PNG encoding failed: {e}"))?;
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Ok(buf)
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}
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/// Encode as JPEG (flattened on white) at `quality` 1..=100.
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pub fn to_jpeg(&self, quality: u8) -> Result<Vec<u8>, String> {
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encode::jpeg(self, quality, None)
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}
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/// Encode as lossless WebP.
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pub fn to_webp(&self) -> Result<Vec<u8>, String> {
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encode::webp(self)
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}
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/// Straight-alpha RGBA at (x, y).
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pub fn pixel(&self, x: u32, y: u32) -> [u8; 4] {
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let i = ((y * self.width + x) * 4) as usize;
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let p = &self.pixels[i..i + 4];
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let a = p[3] as u32;
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if a == 0 {
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return [0, 0, 0, 0];
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}
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let un = |c: u8| ((c as u32 * 255 + a / 2) / a).min(255) as u8;
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[un(p[0]), un(p[1]), un(p[2]), p[3]]
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}
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}
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/// Hasher for pointer-keyed caches: a multiply-xorshift (SipHash showed up in frame profiles).
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#[derive(Default, Clone, Copy)]
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struct PtrHasher(u64);
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impl std::hash::Hasher for PtrHasher {
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fn write(&mut self, bytes: &[u8]) {
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for b in bytes {
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self.0 = (self.0 ^ *b as u64).wrapping_mul(0x0100_0000_01b3);
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}
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}
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fn write_u64(&mut self, n: u64) {
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let x = (self.0 ^ n).wrapping_mul(0x9e37_79b9_7f4a_7c15);
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self.0 = x ^ (x >> 29);
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}
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fn write_usize(&mut self, n: usize) {
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self.write_u64(n as u64);
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}
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fn finish(&self) -> u64 {
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self.0
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}
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}
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type PtrMap<K, V> = HashMap<K, V, std::hash::BuildHasherDefault<PtrHasher>>;
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/// A stroke expanded to a fill outline: (owning node, outline, last frame used).
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struct StrokeEntry {
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node: Arc<Node>,
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outline: Arc<BezPath>,
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stamp: u64,
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}
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/// The slices of a stroke whose gradient runs along or across it, each with its paint and bounds.
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type Slices = Arc<Vec<(BezPath, vectorcraft_color::Paint, Rect)>>;
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/// [`Slices`] cached for a stroke: (owning node, slices, last frame used).
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struct SliceEntry {
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node: Arc<Node>,
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slices: Slices,
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stamp: u64,
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}
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/// Cached per-node geometry, keyed by `Arc` identity. Structural sharing means an unchanged node
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/// keeps its allocation across edits, so a pointer match (with the Arc kept alive here so the
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/// address can't be reused) is an exact cache hit — no invalidation logic needed.
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struct GeomEntry {
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node: Arc<Node>,
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bounds: Option<Rect>,
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path: Option<Arc<BezPath>>,
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stamp: u64,
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}
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/// A clipping path (kept alive so its address can't be reused) and the region it clips to.
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type ClipEntry = (Arc<Node>, Option<Arc<(BezPath, FillRule)>>);
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/// A clipping path (kept alive) and what it paints: its fills and its strokes ([`Node::clip_paint`]).
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type ClipPaintEntry = (Arc<Node>, Option<Arc<Node>>, Option<Arc<Node>>);
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/// Reusable renderer (keeps the render context, decoded images and glyph caches between frames).
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pub struct Renderer {
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texts: PtrMap<usize, (Arc<Node>, Arc<TextGeom>)>,
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/// Clip regions per clipping path (see [`Self::clip_of`]).
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clips: PtrMap<usize, ClipEntry>,
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/// Context reused when rendering single-threaded (`threads == 0`).
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ctx_st: Option<RenderContext>,
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/// Worker threads for the multithreaded rasterizer (0 = single-threaded).
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pub threads: u16,
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geom: PtrMap<usize, GeomEntry>,
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/// Expanded stroke outlines keyed by (stroke layer address, width bits, tolerance level):
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/// panning re-renders reuse them instead of re-expanding every stroke.
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strokes: PtrMap<(usize, u64, i32), StrokeEntry>,
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/// The node being drawn on the plain-path fast path (owner of cached stroke outlines).
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cur: Option<Arc<Node>>,
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stamp: u64,
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/// Opacity folded into paint alpha for the leaf being drawn (avoids a compositing layer).
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alpha: f32,
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ctx: Option<RenderContext>,
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resources: Resources,
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images: HashMap<String, Arc<Pixmap>>,
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/// Statistics of the last frame.
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pub stats: FrameStats,
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/// Brush art per brushed stroke.
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brushes: brush_fx::BrushCache,
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/// Evaluated blends/envelopes and tessellated meshes.
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live: live::LiveCache,
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/// Blurred, tinted drop shadow / outer glow rasters per object and effect (see `fx`).
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shadows: PtrMap<(usize, usize, Ink), fx::ShadowEntry>,
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/// Whether the group being drawn is a knockout group (what its neutral children inherit).
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knockout: bool,
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/// Address of the knockout-group element being drawn as its knockout shape: at full object
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/// opacity and without its opacity mask (see [`Self::draw_knockout`]); 0 = none.
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shape_of: usize,
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/// The art drawn for objects with effects that apply through it (see `fx::has_object_fx`).
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fx_arts: PtrMap<usize, (Arc<Node>, Arc<Node>)>,
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/// Layers open around the drawing point in the current context: a non-isolated group can copy
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/// its backdrop only when there are none (see [`Self::group`]).
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nested: u32,
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/// Copy of the backdrop of the non-isolated group being drawn offscreen, in its context's
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/// pixels: the elements of a non-isolated knockout group composite against it.
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backdrop: Option<Arc<Pixmap>>,
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/// [`Node::blends_through`] per container, keyed like `geom`.
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blends: PtrMap<usize, (Arc<Node>, bool, u64)>,
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/// Clip paths pushed on the current context (path, rule, transform): starting the context
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/// again from a picture of it pushes them again (see [`Self::group`]).
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clip_paths: Vec<(BezPath, FillRule, Affine)>,
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/// What clipping paths paint, per clipping path (see [`Self::clip_paint_of`]).
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clip_paints: PtrMap<usize, ClipPaintEntry>,
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/// Placed images as painted in ink planes (see [`ink`]).
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ink_images: ink::InkImages,
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/// Gradients along or across strokes, keyed like `strokes` (see [`Self::fill_path_gradient`]).
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stroke_slices: PtrMap<(usize, i32), SliceEntry>,
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}
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#[derive(Clone, Copy, Debug, Default)]
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pub struct FrameStats {
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pub drawn: usize,
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pub culled: usize,
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pub micros: u64,
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}
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impl Default for Renderer {
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fn default() -> Self {
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Self::new()
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}
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}
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#[derive(Clone, Copy)]
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struct Frame<'a> {
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/// Drawing into a multithreaded context: vello filter layers must be rendered offscreen.
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mt: bool,
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doc: &'a Document,
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view: Affine,
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/// Visible region in document coordinates (for culling).
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visible: Rect,
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/// Size of one output pixel in document units.
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px: f64,
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opts: &'a RenderOptions,
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/// What colours paint as: screen colours, or one ink plane of a CMYK document (see [`ink`]).
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ink: Ink,
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}
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impl Frame<'_> {
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/// Text space → device pixels when type is snapped to the pixel grid (Type anti-aliasing).
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fn text_snap(&self, t: &TextObject) -> Option<Affine> {
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(self.opts.anti_alias == AntiAlias::Type).then(|| self.view * t.xf)
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}
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/// A render context for drawing this frame's art offscreen (on the calling thread), with its
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/// edge smoothing: hard edges must not depend on where the art is drawn.
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fn offscreen_context(&self, w: u16, h: u16) -> RenderContext {
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let mut ctx = single_threaded_context(w, h);
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ctx.set_aliasing_threshold(self.opts.anti_alias.threshold());
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ctx
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}
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}
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impl Renderer {
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pub fn new() -> Self {
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Self {
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texts: PtrMap::default(),
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clips: PtrMap::default(),
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ctx_st: None,
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threads: default_threads(),
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geom: PtrMap::default(),
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strokes: PtrMap::default(),
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cur: None,
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stamp: 0,
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alpha: 1.0,
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ctx: None,
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resources: Resources::new(),
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images: HashMap::new(),
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stats: FrameStats::default(),
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brushes: Default::default(),
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shadows: PtrMap::default(),
|
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live: live::LiveCache::default(),
|
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knockout: false,
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shape_of: 0,
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fx_arts: PtrMap::default(),
|
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nested: 0,
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backdrop: None,
|
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blends: PtrMap::default(),
|
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clip_paths: vec![],
|
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clip_paints: PtrMap::default(),
|
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ink_images: Default::default(),
|
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stroke_slices: PtrMap::default(),
|
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}
|
||
}
|
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|
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/// Render `doc` into a `width`×`height` image using `view` (document → pixel transform).
|
||
pub fn render(&mut self, doc: &Document, width: u32, height: u32, view: Affine, opts: &RenderOptions) -> Rendered {
|
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let start = now();
|
||
let prepared = proof::prepare(doc, opts);
|
||
let doc: &Document = &prepared;
|
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let w = width.clamp(1, u16::MAX as u32) as u16;
|
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let h = height.clamp(1, u16::MAX as u32) as u16;
|
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// Raster filters (drop shadow, glows, blur) are rendered offscreen on this thread when the
|
||
// main context is multithreaded (see `fx::with_filters`).
|
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let threads = self.threads;
|
||
self.stats = FrameStats::default();
|
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let inv = view.inverse();
|
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let visible = inv.transform_rect_bbox(Rect::new(0.0, 0.0, w as f64, h as f64));
|
||
let px = 1.0 / view.determinant().abs().sqrt().max(1e-12);
|
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let frame = Frame { mt: threads > 0, doc, view, visible, px, opts, ink: Ink::Display };
|
||
self.stamp += 1;
|
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// View Opacity Mask: the mask's coverage in greyscale instead of the artwork.
|
||
if let Some(m) = opts.mask_view.and_then(|id| doc.node(id)).and_then(|n| n.mask.as_deref()) {
|
||
let pixels = self.mask_values(&frame, m, w, h).into_iter().flat_map(|v| [v, v, v, 255]).collect();
|
||
self.stats.micros = now().saturating_sub(start);
|
||
return Rendered { width: w as u32, height: h as u32, pixels };
|
||
}
|
||
let mut pixels = if ink::blends_in_cmyk(doc, opts) {
|
||
// Blending in CMYK: one frame per ink plane, then their inks shown on screen.
|
||
let cmy = self.draw_frame(&Frame { ink: Ink::Cmy, ..frame }, w, h);
|
||
let stats = self.stats;
|
||
let k = self.draw_frame(&Frame { ink: Ink::K, ..frame }, w, h);
|
||
self.stats = stats;
|
||
ink::compose(&cmy, &k, opts.background)
|
||
} else {
|
||
self.draw_frame(&frame, w, h)
|
||
};
|
||
// Drop cache entries not seen for a few frames.
|
||
let g = self.stamp;
|
||
if self.geom.len() > 1024 {
|
||
self.geom.retain(|_, e| g - e.stamp <= 3);
|
||
}
|
||
if self.strokes.len() > 1024 {
|
||
self.strokes.retain(|_, e| g - e.stamp <= 3);
|
||
}
|
||
if self.stroke_slices.len() > 256 {
|
||
self.stroke_slices.retain(|_, e| g - e.stamp <= 3);
|
||
}
|
||
if self.shadows.len() > 256 {
|
||
self.shadows.retain(|_, e| g - e.stamp <= 3);
|
||
}
|
||
proof::post(&mut pixels, opts);
|
||
self.stats.micros = now().saturating_sub(start);
|
||
Rendered { width: w as u32, height: h as u32, pixels }
|
||
}
|
||
|
||
/// Draw frame `f` (`w`×`h` pixels): the background, the artboards and the page's art.
|
||
fn draw_frame(&mut self, f: &Frame, w: u16, h: u16) -> Vec<u8> {
|
||
let (threads, opts) = (self.threads, f.opts);
|
||
let slot = if threads == 0 { self.ctx_st.take() } else { self.ctx.take() };
|
||
let mut ctx = match slot {
|
||
Some(mut c) if c.width() == w && c.height() == h => {
|
||
c.reset();
|
||
c
|
||
}
|
||
_ => RenderContext::new_with(w, h, vello_cpu::RenderSettings { num_threads: threads, ..Default::default() }),
|
||
};
|
||
// `reset` keeps the threshold of the previous render: set it every time.
|
||
ctx.set_aliasing_threshold(opts.anti_alias.threshold());
|
||
if let Some(bg) = opts.background {
|
||
ctx.set_transform(Affine::IDENTITY);
|
||
ctx.set_paint(f.ink.fixed(bg));
|
||
ctx.fill_rect(&kurbo::Rect::new(0.0, 0.0, w as f64, h as f64));
|
||
}
|
||
if opts.artboards && !opts.outline {
|
||
// Paper: white on screen, no ink on the ink planes.
|
||
ctx.set_transform(f.view);
|
||
ctx.set_paint(peniko::Color::WHITE);
|
||
for ab in &f.doc.artboards {
|
||
ctx.fill_rect(&ab.rect);
|
||
}
|
||
}
|
||
(self.nested, self.backdrop) = (0, None);
|
||
self.clip_paths.clear();
|
||
if opts.trim && !f.doc.artboards.is_empty() {
|
||
let mut clip = BezPath::new();
|
||
for ab in &f.doc.artboards {
|
||
clip.extend(ab.rect.path_elements(0.1));
|
||
}
|
||
let blends = self.children_blend(&f.doc.layers);
|
||
let trim = Composite { clip: Some((&clip, FillRule::NonZero)), blends, ..Default::default() };
|
||
self.group(&mut ctx, f, trim, &mut |r, c, fr| r.draw_page(c, fr));
|
||
} else {
|
||
self.draw_page(&mut ctx, f);
|
||
}
|
||
ctx.flush();
|
||
let mut pm = Pixmap::new(w, h);
|
||
ctx.render(&mut pm, &mut self.resources);
|
||
if threads == 0 {
|
||
self.ctx_st = Some(ctx);
|
||
} else {
|
||
self.ctx = Some(ctx);
|
||
}
|
||
pm.data_as_u8_slice().to_vec()
|
||
}
|
||
|
||
/// The page's art: the layers (or the pattern being edited), inside the page group when the
|
||
/// page has one.
|
||
fn draw_page(&mut self, ctx: &mut RenderContext, f: &Frame) {
|
||
if self.draw_pattern_edit(ctx, f) {
|
||
return;
|
||
}
|
||
let doc = f.doc;
|
||
// While editing an opacity mask its art is seen only through the mask.
|
||
let mask_layer = doc.mask_edit.map(|m| m.layer);
|
||
let layers: Vec<Arc<Node>> = doc.layers.iter().filter(|l| Some(l.id) != mask_layer).cloned().collect();
|
||
// Page Isolated Blending / Page Knockout Group: the page is a group of its own.
|
||
let page_group = !f.opts.outline && (doc.page_isolate || doc.page_knockout);
|
||
let knockout = page_group && doc.page_knockout;
|
||
let mut draw = |r: &mut Self, c: &mut RenderContext, fr: &Frame| {
|
||
r.knockout = knockout;
|
||
r.draw_children(c, fr, &layers, knockout);
|
||
r.knockout = false;
|
||
};
|
||
if page_group {
|
||
let blends = self.children_blend(&layers);
|
||
self.group(ctx, f, Composite { isolated: doc.page_isolate, blends, ..Default::default() }, &mut draw);
|
||
} else {
|
||
draw(self, ctx, f);
|
||
}
|
||
}
|
||
|
||
/// Render one artboard (or any document rect) at `scale` pixels per point, transparent or on white,
|
||
/// as exported: template layers are left out.
|
||
pub fn render_region(&mut self, doc: &Document, region: Rect, scale: f64, white: bool) -> Rendered {
|
||
let opts = RenderOptions { background: white.then_some([255, 255, 255, 255]), skip_templates: true, ..Default::default() };
|
||
self.render_region_with(doc, region, scale, &opts)
|
||
}
|
||
|
||
/// Render a document rect at `scale` pixels per point with `opts`.
|
||
pub fn render_region_with(&mut self, doc: &Document, region: Rect, scale: f64, opts: &RenderOptions) -> Rendered {
|
||
let (w, h) = region_pixels(region, scale);
|
||
let view = Affine::scale(scale) * Affine::translate((-region.x0, -region.y0));
|
||
self.render(doc, w, h, view, opts)
|
||
}
|
||
|
||
/// Render a single node (thumbnails, previews) fitted into `size`×`size` pixels.
|
||
pub fn render_thumbnail(&mut self, doc: &Document, id: NodeId, size: u32) -> Option<Rendered> {
|
||
self.render_node_thumbnail(doc, doc.node(id)?, size, None)
|
||
}
|
||
|
||
/// Render any node (also one outside the tree, e.g. opacity-mask art) fitted into
|
||
/// `size`×`size` pixels, optionally over a solid premultiplied background.
|
||
pub fn render_node_thumbnail(&mut self, doc: &Document, n: &Node, size: u32, background: Option<[u8; 4]>) -> Option<Rendered> {
|
||
let b = brush_fx::cull_bounds(n)?;
|
||
let s = (size as f64 - 2.0) / b.width().max(b.height()).max(1e-6);
|
||
let view = Affine::translate((size as f64 / 2.0, size as f64 / 2.0)) * Affine::scale(s) * Affine::translate(-b.center().to_vec2());
|
||
let w = size.clamp(1, u16::MAX as u32) as u16;
|
||
let mut ctx = single_threaded_context(w, w);
|
||
if let Some(bg) = background {
|
||
ctx.set_paint(peniko::Color::from_rgba8(bg[0], bg[1], bg[2], bg[3]));
|
||
ctx.fill_rect(&kurbo::Rect::new(0.0, 0.0, w as f64, w as f64));
|
||
}
|
||
let frame = Frame { mt: false, doc, view, visible: b.inflate(1.0, 1.0), px: 1.0 / s, opts: &RenderOptions::default(), ink: Ink::Display };
|
||
(self.knockout, self.nested, self.backdrop) = (false, 0, None);
|
||
self.clip_paths.clear();
|
||
self.draw_node(&mut ctx, &frame, n, true);
|
||
ctx.flush();
|
||
let mut pm = Pixmap::new(w, w);
|
||
ctx.render(&mut pm, &mut self.resources);
|
||
Some(Rendered { width: size, height: size, pixels: pm.data_as_u8_slice().to_vec() })
|
||
}
|
||
|
||
/// Cached cull bounds of a node (containers union their cached children).
|
||
fn bounds_of(&mut self, a: &Arc<Node>) -> Option<Rect> {
|
||
let key = Arc::as_ptr(a) as usize;
|
||
if let Some(e) = self.geom.get_mut(&key)
|
||
&& Arc::ptr_eq(&e.node, a)
|
||
{
|
||
e.stamp = self.stamp;
|
||
return e.bounds;
|
||
}
|
||
let b = match &a.kind {
|
||
NodeKind::Layer { children, clip: false, .. } | NodeKind::Group { children, clip: false } if !fx::has_object_fx(a) => {
|
||
let mut acc: Option<Rect> = None;
|
||
for c in children {
|
||
if c.visible {
|
||
acc = vectorcraft_geom::union_opt(acc, self.bounds_of(c));
|
||
}
|
||
}
|
||
acc
|
||
}
|
||
_ => brush_fx::cull_bounds(a),
|
||
};
|
||
self.geom.insert(key, GeomEntry { node: a.clone(), bounds: b, path: None, stamp: self.stamp });
|
||
b
|
||
}
|
||
|
||
/// Cached region a clip group's clipping path `a` clips to ([`effects::clip_outline`]):
|
||
/// outlining text and uniting shapes is too slow to repeat every frame.
|
||
fn clip_of(&mut self, a: &Arc<Node>) -> Option<Arc<(BezPath, FillRule)>> {
|
||
let key = Arc::as_ptr(a) as usize;
|
||
if let Some((node, region)) = self.clips.get(&key)
|
||
&& Arc::ptr_eq(node, a)
|
||
{
|
||
return region.clone();
|
||
}
|
||
let region = effects::clip_outline(a).map(Arc::new);
|
||
if self.clips.len() > 1024 {
|
||
self.clips.clear();
|
||
}
|
||
self.clips.insert(key, (a.clone(), region.clone()));
|
||
region
|
||
}
|
||
|
||
/// Cached fills and strokes of clipping path `a` ([`Node::clip_paint`]): the parts keep their
|
||
/// allocations between frames, so their own geometry stays cached.
|
||
fn clip_paint_of(&mut self, a: &Arc<Node>) -> (Option<Arc<Node>>, Option<Arc<Node>>) {
|
||
let key = Arc::as_ptr(a) as usize;
|
||
if let Some((node, fill, stroke)) = self.clip_paints.get(&key)
|
||
&& Arc::ptr_eq(node, a)
|
||
{
|
||
return (fill.clone(), stroke.clone());
|
||
}
|
||
let paint = a.clip_paint();
|
||
let (fill, stroke) = (paint.fill.map(Arc::new), paint.stroke.map(Arc::new));
|
||
if self.clip_paints.len() > 1024 {
|
||
self.clip_paints.clear();
|
||
}
|
||
self.clip_paints.insert(key, (a.clone(), fill.clone(), stroke.clone()));
|
||
(fill, stroke)
|
||
}
|
||
|
||
/// Cached BezPath of a path node.
|
||
fn path_of(&mut self, a: &Arc<Node>) -> Option<Arc<BezPath>> {
|
||
let key = Arc::as_ptr(a) as usize;
|
||
if let Some(e) = self.geom.get(&key)
|
||
&& Arc::ptr_eq(&e.node, a)
|
||
&& let Some(p) = &e.path
|
||
{
|
||
return Some(p.clone());
|
||
}
|
||
let p = Arc::new(a.path_data()?.to_bezpath());
|
||
let bounds = self.bounds_of(a);
|
||
self.geom.insert(key, GeomEntry { node: a.clone(), bounds, path: Some(p.clone()), stamp: self.stamp });
|
||
Some(p)
|
||
}
|
||
|
||
/// Whether `a` is left out of this frame: hidden, a skipped template, or culled.
|
||
fn skipped(&mut self, f: &Frame, a: &Arc<Node>) -> bool {
|
||
let skipped_template = f.opts.skip_templates && matches!(a.kind, NodeKind::Layer { template: true, .. });
|
||
if !a.visible || skipped_template || f.opts.hidden.contains(&a.id) {
|
||
return true;
|
||
}
|
||
match self.bounds_of(a) {
|
||
Some(b) => {
|
||
let pad = f.px * 2.0;
|
||
// Level of detail: leaves smaller than a quarter pixel are invisible.
|
||
let culled =
|
||
!rects_overlap(b.inflate(pad, pad), f.visible) || (!a.is_container() && b.width() < f.px * 0.25 && b.height() < f.px * 0.25);
|
||
self.stats.culled += culled as usize;
|
||
culled
|
||
}
|
||
None => !a.is_container(),
|
||
}
|
||
}
|
||
|
||
fn draw_arc(&mut self, ctx: &mut RenderContext, f: &Frame, a: &Arc<Node>) {
|
||
if self.skipped(f, a) {
|
||
return;
|
||
}
|
||
if let Some(m) = a.mask.as_deref()
|
||
&& !m.disabled
|
||
&& !f.opts.outline
|
||
&& !self.is_shape(a)
|
||
{
|
||
// A masked object is a non-isolated group of its own.
|
||
let mask = Some(self.opacity_mask(f, m, ctx.width(), ctx.height()));
|
||
let blends = a.blend != vectorcraft_color::BlendMode::Normal || (!a.isolate && self.blends_through(a));
|
||
let bounds = if blends { self.bounds_of(a) } else { None };
|
||
self.group(ctx, f, Composite { mask, blends, bounds, ..Default::default() }, &mut |r, c, fr| r.draw_arc_body(c, fr, a));
|
||
return;
|
||
}
|
||
self.draw_arc_body(ctx, f, a);
|
||
}
|
||
|
||
/// Render an opacity mask's art offscreen and turn its luminance into a coverage mask.
|
||
fn opacity_mask(&mut self, f: &Frame, m: &vectorcraft_doc::OpacityMask, w: u16, h: u16) -> vello_cpu::Mask {
|
||
vello_cpu::Mask::from_parts(self.mask_values(f, m, w, h), w, h)
|
||
}
|
||
|
||
/// The coverage of opacity mask `m` per output pixel (row-major): its art rendered offscreen,
|
||
/// as luminance ([`mask_value`]).
|
||
fn mask_values(&mut self, f: &Frame, m: &vectorcraft_doc::OpacityMask, w: u16, h: u16) -> Vec<u8> {
|
||
let mut mctx = f.offscreen_context(w, h);
|
||
// Mask art is a picture of its own: it takes no part in a knockout group around the object,
|
||
// and its luminance is that of its screen colours.
|
||
let outer =
|
||
(std::mem::take(&mut self.knockout), std::mem::take(&mut self.nested), self.backdrop.take(), std::mem::take(&mut self.clip_paths));
|
||
self.draw_node(&mut mctx, &Frame { mt: false, ink: Ink::Display, ..*f }, &m.art, true);
|
||
(self.knockout, self.nested, self.backdrop, self.clip_paths) = outer;
|
||
mctx.flush();
|
||
let mut pm = Pixmap::new(w, h);
|
||
mctx.render(&mut pm, &mut self.resources);
|
||
pm.data().iter().map(|p| mask_value(p.r, p.g, p.b, p.a, m.clip, m.invert)).collect()
|
||
}
|
||
|
||
/// Everything [`Self::draw_arc`] does after culling.
|
||
fn draw_arc_body(&mut self, ctx: &mut RenderContext, f: &Frame, a: &Arc<Node>) {
|
||
// Fast path for plain paths: cached geometry, opacity folded into the paint.
|
||
// A blend mode on a single plain fill applies per draw (exact for one paint operation);
|
||
// a blend layer would composite the whole viewport.
|
||
let blended = a.blend != vectorcraft_color::BlendMode::Normal;
|
||
if let NodeKind::Path { rule, guide: false, .. } = &a.kind
|
||
&& !f.opts.outline
|
||
&& (!blended || single_plain_fill(a))
|
||
&& !a.isolate
|
||
&& !fx::has_fx(a)
|
||
&& (self.opacity_of(a) >= 1.0 || painted_items(a) == 1)
|
||
&& let Some(bp) = self.path_of(a)
|
||
{
|
||
self.alpha = self.opacity_of(a).clamp(0.0, 1.0);
|
||
self.cur = Some(a.clone());
|
||
if blended {
|
||
ctx.set_blend_mode(blend_mode(a.blend));
|
||
}
|
||
self.draw_shape(ctx, f, a, &bp, *rule);
|
||
if blended {
|
||
ctx.set_blend_mode(blend_mode(vectorcraft_color::BlendMode::Normal));
|
||
}
|
||
self.cur = None;
|
||
self.alpha = 1.0;
|
||
self.stats.drawn += 1;
|
||
return;
|
||
}
|
||
if fx::has_object_fx(a) {
|
||
return self.draw_object_fx(ctx, f, a, true);
|
||
}
|
||
if let NodeKind::Text(t) = &a.kind
|
||
&& self.opacity_of(a) >= 1.0
|
||
&& a.blend == vectorcraft_color::BlendMode::Normal
|
||
&& !fx::has_fx(a)
|
||
{
|
||
let g = match f.text_snap(t) {
|
||
Some(xf) => Arc::new(text_geom_snapped(t, Some(xf))),
|
||
None => self.text_geom_of(a, t),
|
||
};
|
||
self.draw_text_geom(ctx, f, a, t, &g);
|
||
self.stats.drawn += 1;
|
||
return;
|
||
}
|
||
if vectorcraft_doc::live::is_live(a) || effects::has_pathfinder(a) {
|
||
return self.draw_live(ctx, f, a);
|
||
}
|
||
self.draw_node(ctx, f, a, true);
|
||
}
|
||
|
||
fn draw_node(&mut self, ctx: &mut RenderContext, f: &Frame, n: &Node, force: bool) {
|
||
if !force && (!n.visible || f.opts.hidden.contains(&n.id)) {
|
||
return;
|
||
}
|
||
if force {
|
||
// Bounds were already checked by draw_arc (or the caller wants it drawn regardless).
|
||
} else if let Some(b) = fx::cull_bounds(n) {
|
||
let pad = f.px * 2.0;
|
||
if !rects_overlap(b.inflate(pad, pad), f.visible) {
|
||
self.stats.culled += n.count();
|
||
return;
|
||
}
|
||
} else if !n.is_container() {
|
||
return;
|
||
}
|
||
if fx::has_object_fx(n) {
|
||
return self.draw_object_fx(ctx, f, &Arc::new(n.clone()), false);
|
||
}
|
||
let outline = f.opts.outline;
|
||
let template_dim = matches!(n.kind, NodeKind::Layer { template: true, .. }) && f.opts.dim_templates;
|
||
let opacity = if template_dim { self.opacity_of(n) * 0.5 } else { self.opacity_of(n) };
|
||
// Whether this container's children knock each other out.
|
||
let knockout = !outline && n.knocks_out(self.knockout);
|
||
let enclosing = std::mem::replace(&mut self.knockout, knockout);
|
||
if !outline && (opacity < 1.0 || n.blend != vectorcraft_color::BlendMode::Normal || n.isolate || knockout) {
|
||
let blends = self.blends_through(n);
|
||
let bounds = if blends { self.node_bounds(n) } else { None };
|
||
let comp = Composite { blend: n.blend, opacity, isolated: n.isolate, blends, bounds, ..Default::default() };
|
||
self.group(ctx, f, comp, &mut |r, c, fr| r.draw_content(c, fr, n, knockout));
|
||
} else {
|
||
self.draw_content(ctx, f, n, knockout);
|
||
}
|
||
self.knockout = enclosing;
|
||
self.stats.drawn += 1;
|
||
}
|
||
|
||
/// What `n` draws inside its transparency group (`knockout`: its children knock each other out).
|
||
fn draw_content(&mut self, ctx: &mut RenderContext, f: &Frame, n: &Node, knockout: bool) {
|
||
match &n.kind {
|
||
NodeKind::Layer { children, clip: false, .. } | NodeKind::Group { children, clip: false } => {
|
||
self.draw_children(ctx, f, children, knockout)
|
||
}
|
||
NodeKind::Group { children, clip: true } | NodeKind::Layer { children, clip: true, .. } if f.opts.outline => {
|
||
for c in children {
|
||
self.draw_node(ctx, f, c, false);
|
||
}
|
||
}
|
||
NodeKind::Group { children, clip: true } | NodeKind::Layer { children, clip: true, .. } => {
|
||
// Nothing to clip by hides the clipped art (as in the SVG and PDF output). A clip
|
||
// group doesn't isolate: blending inside it reaches the art below. The clipping
|
||
// path's fill paints behind the clipped art and its stroke over it, unclipped.
|
||
if let Some((clip, rest)) = children.split_first()
|
||
&& let Some(region) = self.clip_of(clip)
|
||
{
|
||
let (fill, stroke) = self.clip_paint_of(clip);
|
||
let blends = self.blends_through(n);
|
||
let bounds = if blends { Some(region.0.bounding_box()) } else { None };
|
||
let comp = Composite { clip: Some((®ion.0, region.1)), blends, bounds, ..Default::default() };
|
||
self.group(ctx, f, comp, &mut |r, c, fr| {
|
||
if let Some(fill) = &fill {
|
||
r.draw_arc(c, fr, fill);
|
||
}
|
||
r.draw_children(c, fr, rest, knockout)
|
||
});
|
||
if let Some(stroke) = &stroke {
|
||
self.draw_arc(ctx, f, stroke);
|
||
}
|
||
}
|
||
}
|
||
NodeKind::Path { path, rule, guide, .. } => {
|
||
let bp = path.to_bezpath();
|
||
if *guide {
|
||
self.hairline(ctx, f, &bp, [0x4a, 0xd8, 0xff, 255]);
|
||
} else {
|
||
self.draw_shape(ctx, f, n, &bp, *rule);
|
||
}
|
||
}
|
||
NodeKind::Compound { children, rule } => {
|
||
let mut bp = BezPath::new();
|
||
for c in children {
|
||
if let Some(p) = c.path_data() {
|
||
bp.extend(p.to_bezpath());
|
||
}
|
||
}
|
||
self.draw_shape(ctx, f, n, &bp, *rule);
|
||
}
|
||
NodeKind::Text(t) => self.draw_text(ctx, f, n, t),
|
||
NodeKind::Image(im) => self.draw_image(ctx, f, im),
|
||
NodeKind::SymbolInstance { symbol, xf } => {
|
||
if let Some(sym) = f.doc.symbols.iter().find(|s| &s.name == symbol) {
|
||
let mut art = brush_fx::instance_art(&sym.art, n);
|
||
art.transform(*xf, false);
|
||
self.draw_node(ctx, f, &art, true);
|
||
}
|
||
}
|
||
NodeKind::Blend { .. } | NodeKind::Envelope { .. } | NodeKind::Mesh(_) | NodeKind::Repeat(_) => self.draw_live_node(ctx, f, n),
|
||
}
|
||
}
|
||
|
||
/// The children of a group: as the elements of a knockout group when `knockout`.
|
||
fn draw_children(&mut self, ctx: &mut RenderContext, f: &Frame, children: &[Arc<Node>], knockout: bool) {
|
||
if knockout {
|
||
self.draw_knockout(ctx, f, children);
|
||
} else {
|
||
for c in children {
|
||
self.draw_arc(ctx, f, c);
|
||
}
|
||
}
|
||
}
|
||
|
||
/// Cull bounds of `n`: cached when it is a node of the tree being drawn.
|
||
fn node_bounds(&mut self, n: &Node) -> Option<Rect> {
|
||
match self.geom.get(&(n as *const Node as usize)) {
|
||
// The entry keeps its node alive, so the address is that node's.
|
||
Some(e) if std::ptr::eq(Arc::as_ptr(&e.node), n) => e.bounds,
|
||
_ => fx::cull_bounds(n),
|
||
}
|
||
}
|
||
|
||
/// The children of a knockout group ([`Node::knockout_elements`]). Each element first erases
|
||
/// what the elements below it drew wherever it paints (its knockout shape: its coverage at full
|
||
/// object opacity without its opacity mask, or as drawn when its opacity and mask define the
|
||
/// knockout shape), then adds itself: it composites against the group's backdrop instead of
|
||
/// over the elements below it (the art below the group when the group is non-isolated and
|
||
/// drawn over a copy of it, see [`Self::group`]).
|
||
fn draw_knockout(&mut self, ctx: &mut RenderContext, f: &Frame, children: &[Arc<Node>]) {
|
||
let backdrop = self.backdrop.take();
|
||
for c in Node::knockout_elements(children) {
|
||
if self.skipped(f, c) {
|
||
continue;
|
||
}
|
||
self.knockout_pass(ctx, f, c, Compose::DestOut, None);
|
||
self.knockout_pass(ctx, f, c, Compose::Plus, backdrop.as_ref());
|
||
}
|
||
self.backdrop = backdrop;
|
||
}
|
||
|
||
/// Whether `n` is the knockout element being drawn as its shape (see [`Self::draw_knockout`]).
|
||
fn is_shape(&self, n: &Node) -> bool {
|
||
self.shape_of == n as *const Node as usize
|
||
}
|
||
|
||
/// The object opacity `n` is drawn with (full while it is drawn as its knockout shape).
|
||
pub(crate) fn opacity_of(&self, n: &Node) -> f32 {
|
||
if self.is_shape(n) { 1.0 } else { n.opacity }
|
||
}
|
||
|
||
fn hairline(&mut self, ctx: &mut RenderContext, f: &Frame, bp: &BezPath, rgba: [u8; 4]) {
|
||
ctx.set_transform(Affine::IDENTITY);
|
||
let mut screen = bp.clone();
|
||
screen.apply_affine(f.view);
|
||
ctx.set_stroke(kurbo::Stroke::new(1.0));
|
||
ctx.set_paint(f.ink.fixed(rgba));
|
||
ctx.stroke_path(&screen);
|
||
}
|
||
|
||
fn draw_shape(&mut self, ctx: &mut RenderContext, f: &Frame, n: &Node, bp: &BezPath, rule: FillRule) {
|
||
if fx::has_fx(n) {
|
||
return self.draw_shape_fx(ctx, f, n, bp, rule);
|
||
}
|
||
if f.opts.outline {
|
||
self.hairline(ctx, f, bp, [0, 0, 0, 255]);
|
||
return;
|
||
}
|
||
// Bounds only matter to gradients and patterns (their geometry is relative to the object).
|
||
let solid = |p: &vectorcraft_color::Paint| matches!(p, vectorcraft_color::Paint::Solid { .. } | vectorcraft_color::Paint::None);
|
||
let needs_bounds = n.appearance.items.iter().any(|i| match i {
|
||
AppearanceItem::Fill(fl) => !solid(&fl.paint),
|
||
AppearanceItem::Stroke(st) => !solid(&st.paint),
|
||
});
|
||
let bounds = if needs_bounds { bp.bounding_box() } else { Rect::ZERO };
|
||
for item in &n.appearance.items {
|
||
match item {
|
||
AppearanceItem::Fill(fl) => {
|
||
if !fl.visible || fl.paint.is_none() {
|
||
continue;
|
||
}
|
||
let layered = fl.opacity < 1.0 || fl.blend != vectorcraft_color::BlendMode::Normal;
|
||
if layered {
|
||
ctx.set_transform(Affine::IDENTITY);
|
||
ctx.push_layer(None, Some(blend_mode(fl.blend)), Some(fl.opacity), None, None);
|
||
}
|
||
ctx.set_transform(f.view);
|
||
if paint::set_paint(ctx, &fl.paint, bounds, f) {
|
||
self.fold_alpha(ctx, f.ink, &fl.paint);
|
||
ctx.set_fill_rule(fill_rule(rule));
|
||
ctx.fill_path(bp);
|
||
}
|
||
if layered {
|
||
ctx.pop_layer();
|
||
}
|
||
}
|
||
AppearanceItem::Stroke(st) => {
|
||
if !st.visible || st.paint.is_none() || st.width <= 0.0 {
|
||
continue;
|
||
}
|
||
if st.brush.is_some() && self.draw_brush(ctx, f, n, bp, st) {
|
||
continue;
|
||
}
|
||
self.draw_stroke(ctx, f, Affine::IDENTITY, bp, rule, st, bounds);
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
/// Multiply the folded object opacity into a solid paint.
|
||
fn fold_alpha(&self, ctx: &mut RenderContext, ink: Ink, p: &vectorcraft_color::Paint) {
|
||
if self.alpha < 1.0
|
||
&& let vectorcraft_color::Paint::Solid { color, .. } = p
|
||
{
|
||
ctx.set_paint(ink.color(color, self.alpha));
|
||
}
|
||
}
|
||
|
||
/// Paint stroke `st` of the shape `bp` (in the space `xf` maps to the document; `bounds`: its
|
||
/// geometric bounds there) with its alignment, dashes, profile, arrowheads, opacity and blend.
|
||
#[allow(clippy::too_many_arguments)]
|
||
fn draw_stroke(&mut self, ctx: &mut RenderContext, f: &Frame, xf: Affine, bp: &BezPath, rule: FillRule, st: &StrokeLayer, bounds: Rect) {
|
||
let pieces = effects::stroke::stroke_pieces(bp, st);
|
||
// The line and its heads overlap: they take the opacity once, in one layer, instead of
|
||
// each folding it into its paint.
|
||
let folded = if pieces.heads.is_empty() { 1.0 } else { std::mem::replace(&mut self.alpha, 1.0) };
|
||
let opacity = st.opacity * folded;
|
||
let layered = opacity < 1.0 || st.blend != vectorcraft_color::BlendMode::Normal || st.align == StrokeAlign::Outside;
|
||
if layered {
|
||
ctx.set_transform(Affine::IDENTITY);
|
||
ctx.push_layer(None, Some(blend_mode(st.blend)), Some(opacity), None, None);
|
||
}
|
||
ctx.set_transform(f.view * xf);
|
||
let closed = effects::stroke::is_closed(bp);
|
||
// Keep hairlines visible when zoomed far out (at least ~1 device pixel).
|
||
let width = effects::stroke::aligned_width(st, closed).max(f.px * 0.5 / xf.determinant().abs().sqrt().max(1e-9));
|
||
let inside = st.align == StrokeAlign::Inside && closed;
|
||
if inside {
|
||
ctx.set_fill_rule(fill_rule(rule));
|
||
ctx.push_clip_layer(bp);
|
||
}
|
||
// One paint box for the line and the heads, so a gradient runs on into the heads.
|
||
let paint_bounds = bounds.inflate(st.width / 2.0, st.width / 2.0);
|
||
if let Some(g) = st.path_gradient() {
|
||
self.fill_path_gradient(ctx, f, bp, rule, st, &pieces, width, &g.gradient);
|
||
} else if paint::set_paint(ctx, &st.paint, paint_bounds, f) {
|
||
self.fold_alpha(ctx, f.ink, &st.paint);
|
||
ctx.set_fill_rule(peniko::Fill::NonZero);
|
||
match self.cached_stroke(f, &pieces.line, st, width) {
|
||
Some(o) => ctx.fill_path(&o),
|
||
None => ctx.fill_path(&effects::stroke::line_outline(&pieces.line, st, width, f.px * 0.25)),
|
||
}
|
||
for head in &pieces.heads {
|
||
ctx.fill_path(&head.outline);
|
||
}
|
||
}
|
||
if inside {
|
||
ctx.pop_layer();
|
||
}
|
||
if st.align == StrokeAlign::Outside && closed {
|
||
// Punch out the interior.
|
||
ctx.set_blend_mode(BlendMode::new(Mix::Normal, Compose::DestOut));
|
||
ctx.set_paint(peniko::Color::BLACK);
|
||
ctx.set_fill_rule(fill_rule(rule));
|
||
ctx.fill_path(bp);
|
||
ctx.set_blend_mode(BlendMode::default());
|
||
}
|
||
if layered {
|
||
ctx.pop_layer();
|
||
}
|
||
if !pieces.heads.is_empty() {
|
||
self.alpha = folded;
|
||
}
|
||
}
|
||
|
||
/// Paint the line and arrowheads (`pieces`) of stroke `st` of `bp` (filled with `rule`) with
|
||
/// its gradient `g` laid along or across the path ([`effects::stroke::gradient_slices`]). Each
|
||
/// piece clips the slices, grown a pixel into each other and each replacing what it covers, so
|
||
/// neighbours meet without seams and translucent colours paint once.
|
||
#[allow(clippy::too_many_arguments)]
|
||
fn fill_path_gradient(
|
||
&mut self,
|
||
ctx: &mut RenderContext,
|
||
f: &Frame,
|
||
bp: &BezPath,
|
||
rule: FillRule,
|
||
st: &StrokeLayer,
|
||
pieces: &effects::stroke::StrokePieces,
|
||
width: f64,
|
||
g: &vectorcraft_color::Gradient,
|
||
) {
|
||
let level = (f.px * 0.25).log2().floor() as i32;
|
||
let make = || -> Slices {
|
||
let tol = 2f64.powi(level);
|
||
// Reach a pixel past the stroke, so its antialiased edge has colour under it.
|
||
let slices = effects::stroke::gradient_slices(bp, rule, st, tol, f.px + tol, f.px);
|
||
Arc::new(
|
||
slices
|
||
.into_iter()
|
||
.map(|s| {
|
||
let (b, paint) = (s.shape.bounding_box(), s.paint(g));
|
||
(s.shape, paint, b)
|
||
})
|
||
.collect(),
|
||
)
|
||
};
|
||
let slices = match self.cur.clone() {
|
||
Some(node) => {
|
||
let key = (st as *const StrokeLayer as usize, level);
|
||
match self.stroke_slices.get_mut(&key) {
|
||
Some(e) if Arc::ptr_eq(&e.node, &node) => {
|
||
e.stamp = self.stamp;
|
||
e.slices.clone()
|
||
}
|
||
_ => {
|
||
let slices = make();
|
||
self.stroke_slices.insert(key, SliceEntry { node, slices: slices.clone(), stamp: self.stamp });
|
||
slices
|
||
}
|
||
}
|
||
}
|
||
None => make(),
|
||
};
|
||
let line = match self.cached_stroke(f, &pieces.line, st, width) {
|
||
Some(o) => o,
|
||
None => Arc::new(effects::stroke::line_outline(&pieces.line, st, width, f.px * 0.25)),
|
||
};
|
||
ctx.set_fill_rule(peniko::Fill::NonZero);
|
||
for clip in std::iter::once(&*line).chain(pieces.heads.iter().map(|h| &h.outline)) {
|
||
let cb = clip.bounding_box();
|
||
if clip.elements().is_empty() || !cb.is_finite() {
|
||
continue;
|
||
}
|
||
ctx.push_clip_layer(clip);
|
||
ctx.set_blend_mode(BlendMode::new(Mix::Normal, Compose::Copy));
|
||
for (shape, paint, b) in slices.iter() {
|
||
if rects_overlap(*b, cb) && paint::set_paint(ctx, paint, *b, f) {
|
||
ctx.fill_path(shape);
|
||
}
|
||
}
|
||
ctx.set_blend_mode(BlendMode::default());
|
||
ctx.pop_layer();
|
||
}
|
||
}
|
||
|
||
/// The line part of a stroke of the fast-path node `self.cur` (see
|
||
/// [`effects::stroke::line_outline`]), cached across frames. The tolerance (vello's 0.25
|
||
/// device px) is bucketed to powers of two, never coarser than needed, so zooming reuses
|
||
/// outlines until the level changes.
|
||
fn cached_stroke(&mut self, f: &Frame, line: &BezPath, st: &StrokeLayer, width: f64) -> Option<Arc<BezPath>> {
|
||
let node = self.cur.clone()?;
|
||
let level = (f.px * 0.25).log2().floor() as i32;
|
||
let key = (st as *const StrokeLayer as usize, width.to_bits(), level);
|
||
if let Some(e) = self.strokes.get_mut(&key)
|
||
&& Arc::ptr_eq(&e.node, &node)
|
||
{
|
||
e.stamp = self.stamp;
|
||
return Some(e.outline.clone());
|
||
}
|
||
let outline = Arc::new(effects::stroke::line_outline(line, st, width, 2f64.powi(level)));
|
||
self.strokes.insert(key, StrokeEntry { node, outline: outline.clone(), stamp: self.stamp });
|
||
Some(outline)
|
||
}
|
||
|
||
fn draw_text(&mut self, ctx: &mut RenderContext, f: &Frame, n: &Node, t: &TextObject) {
|
||
let g = text_geom_snapped(t, f.text_snap(t));
|
||
self.draw_text_geom(ctx, f, n, t, &g);
|
||
}
|
||
|
||
/// Cached glyph geometry for a text node (keyed by Arc identity like paths).
|
||
fn text_geom_of(&mut self, a: &Arc<Node>, t: &TextObject) -> Arc<TextGeom> {
|
||
let key = Arc::as_ptr(a) as usize;
|
||
if let Some((node, g)) = self.texts.get(&key)
|
||
&& Arc::ptr_eq(node, a)
|
||
{
|
||
return g.clone();
|
||
}
|
||
let g = Arc::new(text_geom(t));
|
||
if self.texts.len() > 4096 {
|
||
self.texts.clear();
|
||
}
|
||
self.texts.insert(key, (a.clone(), g.clone()));
|
||
g
|
||
}
|
||
|
||
fn draw_text_geom(&mut self, ctx: &mut RenderContext, f: &Frame, n: &Node, t: &TextObject, g: &TextGeom) {
|
||
let xf = f.view * t.xf;
|
||
if f.opts.outline {
|
||
let mut p = g.all.clone();
|
||
p.apply_affine(xf);
|
||
ctx.set_transform(Affine::IDENTITY);
|
||
ctx.set_stroke(kurbo::Stroke::new(1.0));
|
||
ctx.set_paint(peniko::Color::BLACK);
|
||
ctx.stroke_path(&p);
|
||
return;
|
||
}
|
||
let tb = t.xf.transform_rect_bbox(g.bounds);
|
||
// Overprinting characters multiply per draw, like overprinting fills and strokes
|
||
// ([`proof`]); the object blend mode is Normal here or applied by an enclosing layer.
|
||
let overprints = proof::overprints(f.opts);
|
||
let overprint = |ctx: &mut RenderContext, on: bool| {
|
||
if overprints {
|
||
ctx.set_blend_mode(if on { blend_mode(vectorcraft_color::BlendMode::Multiply) } else { BlendMode::default() });
|
||
}
|
||
};
|
||
// The object's own fills and strokes paint the whole outline: those below the Characters
|
||
// row under the characters' own fill and stroke, the others over them.
|
||
let (below, above) = n.appearance.split_contents();
|
||
let all = (!n.appearance.items.is_empty()).then(|| {
|
||
let mut all = g.all.clone();
|
||
all.apply_affine(t.xf);
|
||
all
|
||
});
|
||
if let Some(all) = &all {
|
||
self.draw_text_items(ctx, f, n, below, all, tb);
|
||
}
|
||
if f.opts.highlight_substitutions {
|
||
let setup = &f.doc.setup;
|
||
for (on, path) in [(setup.highlight_substituted_fonts, &g.substituted_fonts), (setup.highlight_substituted_glyphs, &g.substituted_glyphs)]
|
||
{
|
||
if on && !path.elements().is_empty() {
|
||
ctx.set_transform(xf);
|
||
ctx.set_fill_rule(peniko::Fill::NonZero);
|
||
ctx.set_paint(SUBSTITUTED);
|
||
ctx.fill_path(path);
|
||
}
|
||
}
|
||
}
|
||
for (i, run) in t.runs.iter().enumerate() {
|
||
let Some(path) = g.runs.get(i) else { continue };
|
||
if path.elements().is_empty() {
|
||
continue;
|
||
}
|
||
ctx.set_transform(xf);
|
||
ctx.set_fill_rule(peniko::Fill::NonZero);
|
||
if paint::set_paint(ctx, &run.style.fill, g.bounds, f) {
|
||
self.fold_alpha(ctx, f.ink, &run.style.fill);
|
||
overprint(ctx, run.style.overprint_fill);
|
||
ctx.fill_path(path);
|
||
}
|
||
if run.style.has_stroke() {
|
||
// Character strokes are drawn in text space, with their cap, join and dashes.
|
||
overprint(ctx, run.style.overprint_stroke);
|
||
self.draw_stroke(ctx, f, t.xf, path, FillRule::NonZero, &run.style.stroke_layer(), g.bounds);
|
||
}
|
||
}
|
||
overprint(ctx, false);
|
||
if let Some(all) = &all {
|
||
self.draw_text_items(ctx, f, n, above, all, tb);
|
||
}
|
||
}
|
||
|
||
/// Paint some of type `n`'s own fills and strokes (`items`) on its glyph outlines `all`
|
||
/// (document space; `tb` their bounds). Fills composite with their own opacity and blend mode;
|
||
/// strokes take every stroke option, as on paths.
|
||
fn draw_text_items(&mut self, ctx: &mut RenderContext, f: &Frame, n: &Node, items: &[AppearanceItem], all: &BezPath, tb: Rect) {
|
||
for item in items.iter().filter(|i| i.visible() && !i.paint().is_none()) {
|
||
match item {
|
||
AppearanceItem::Fill(fl) => {
|
||
let layered = fl.opacity < 1.0 || fl.blend != vectorcraft_color::BlendMode::Normal;
|
||
if layered {
|
||
ctx.set_transform(Affine::IDENTITY);
|
||
ctx.push_layer(None, Some(blend_mode(fl.blend)), Some(fl.opacity), None, None);
|
||
}
|
||
ctx.set_transform(f.view);
|
||
if paint::set_paint(ctx, &fl.paint, tb, f) {
|
||
ctx.set_fill_rule(peniko::Fill::NonZero);
|
||
ctx.fill_path(all);
|
||
}
|
||
if layered {
|
||
ctx.pop_layer();
|
||
}
|
||
}
|
||
AppearanceItem::Stroke(st) if st.width > 0.0 => {
|
||
if st.brush.is_none() || !self.draw_brush(ctx, f, n, all, st) {
|
||
self.draw_stroke(ctx, f, Affine::IDENTITY, all, FillRule::NonZero, st, tb);
|
||
}
|
||
}
|
||
AppearanceItem::Stroke(_) => {}
|
||
}
|
||
}
|
||
}
|
||
|
||
fn draw_image(&mut self, ctx: &mut RenderContext, f: &Frame, im: &vectorcraft_doc::ImageObject) {
|
||
let rect = Rect::new(0.0, 0.0, im.width as f64, im.height as f64);
|
||
// Outline mode draws the image's frame, and with Document Setup → Show Images in Outline
|
||
// Mode its pixels in greyscale under the frame.
|
||
let outline = f.opts.outline;
|
||
let pixels = if outline && !f.doc.setup.outline_images { None } else { self.image_pixmap(f.doc, &im.key, outline) };
|
||
if let Some(pm) = pixels {
|
||
let pm = if outline { pm } else { self.ink_image(&im.key, &pm, f.ink) };
|
||
let sx = im.width as f64 / pm.width().max(1) as f64;
|
||
let sy = im.height as f64 / pm.height().max(1) as f64;
|
||
ctx.set_transform(f.view * im.xf);
|
||
ctx.set_paint(vello_cpu::Image { image: vello_cpu::ImageSource::Pixmap(pm), sampler: peniko::ImageSampler::default() });
|
||
ctx.set_paint_transform(Affine::scale_non_uniform(sx, sy));
|
||
ctx.fill_rect(&rect);
|
||
ctx.reset_paint_transform();
|
||
}
|
||
if outline {
|
||
let mut p = rect.to_path(0.1);
|
||
p.apply_affine(im.xf);
|
||
self.hairline(ctx, f, &p, [0, 0, 0, 255]);
|
||
}
|
||
}
|
||
|
||
/// The decoded pixels of image blob `key` (cached), or a greyscale copy of them.
|
||
fn image_pixmap(&mut self, doc: &Document, key: &str, grey: bool) -> Option<Arc<Pixmap>> {
|
||
let colour = match self.images.get(key) {
|
||
Some(p) => p.clone(),
|
||
None => {
|
||
let pm = Arc::new(paint::decode_pixmap(&doc.images.get(key)?.bytes)?);
|
||
self.images.insert(key.to_string(), pm.clone());
|
||
pm
|
||
}
|
||
};
|
||
if !grey {
|
||
return Some(colour);
|
||
}
|
||
let grey_key = format!("{key}\u{0}grey");
|
||
if let Some(p) = self.images.get(&grey_key) {
|
||
return Some(p.clone());
|
||
}
|
||
let mut pm = (*colour).clone();
|
||
for px in pm.data_mut() {
|
||
// The luma of premultiplied components is the premultiplied luma.
|
||
let l = (0.2126 * px.r as f32 + 0.7152 * px.g as f32 + 0.0722 * px.b as f32 + 0.5) as u8;
|
||
(px.r, px.g, px.b) = (l, l, l);
|
||
}
|
||
let pm = Arc::new(pm);
|
||
self.images.insert(grey_key, pm.clone());
|
||
Some(pm)
|
||
}
|
||
}
|
||
|
||
/// Opacity-mask coverage of one premultiplied pixel: luminance, with the area outside the mask
|
||
/// art black (clip) or white (no clip), optionally inverted.
|
||
fn mask_value(r: u8, g: u8, b: u8, a: u8, clip: bool, invert: bool) -> u8 {
|
||
let [kr, kg, kb] = vectorcraft_color::blend::MASK_LUM;
|
||
let mut l = (kr * r as f32 + kg * g as f32 + kb * b as f32) / 255.0;
|
||
if !clip {
|
||
l += 1.0 - a as f32 / 255.0;
|
||
}
|
||
if invert {
|
||
l = 1.0 - l;
|
||
}
|
||
(l.clamp(0.0, 1.0) * 255.0 + 0.5) as u8
|
||
}
|
||
|
||
/// A render context on the calling thread. vello_cpu's `RenderContext::new` defaults to a
|
||
/// multithreaded dispatcher, which panics on filter effects (glows, shadows, blur).
|
||
pub(crate) fn single_threaded_context(w: u16, h: u16) -> RenderContext {
|
||
RenderContext::new_with(w, h, vello_cpu::RenderSettings { num_threads: 0, ..Default::default() })
|
||
}
|
||
|
||
/// Exactly one visible painted item, a fill with its own Normal blend and full opacity (one
|
||
/// paint operation, so an object blend mode can be applied per draw).
|
||
fn single_plain_fill(n: &Node) -> bool {
|
||
let mut painted = n.appearance.items.iter().filter(|i| match i {
|
||
AppearanceItem::Fill(f) => f.visible && !f.paint.is_none(),
|
||
AppearanceItem::Stroke(s) => s.visible && !s.paint.is_none() && s.width > 0.0,
|
||
});
|
||
matches!((painted.next(), painted.next()), (Some(AppearanceItem::Fill(f)), None) if f.blend == vectorcraft_color::BlendMode::Normal && f.opacity >= 1.0 && !matches!(f.paint, vectorcraft_color::Paint::Pattern { .. }))
|
||
}
|
||
|
||
/// Number of visible painted fill/stroke items (opacity folding is exact only for one).
|
||
fn painted_items(n: &Node) -> usize {
|
||
n.appearance
|
||
.items
|
||
.iter()
|
||
.filter(|i| match i {
|
||
AppearanceItem::Fill(f) => f.visible && !f.paint.is_none() && matches!(f.paint, vectorcraft_color::Paint::Solid { .. }),
|
||
AppearanceItem::Stroke(s) => s.visible && !s.paint.is_none() && s.width > 0.0 && matches!(s.paint, vectorcraft_color::Paint::Solid { .. }) && s.dash.is_none(),
|
||
})
|
||
.count()
|
||
.max(if n.appearance.items.iter().any(|i| matches!(i, AppearanceItem::Fill(f) if f.visible && !matches!(f.paint, vectorcraft_color::Paint::Solid { .. } | vectorcraft_color::Paint::None)) || matches!(i, AppearanceItem::Stroke(s) if s.visible && !matches!(s.paint, vectorcraft_color::Paint::Solid { .. } | vectorcraft_color::Paint::None))) { 2 } else { 0 })
|
||
}
|
||
|
||
/// Preferred rasterizer thread count set by the app (Preferences → Performance); negative = automatic.
|
||
static THREADS_OVERRIDE: std::sync::atomic::AtomicI32 = std::sync::atomic::AtomicI32::new(-1);
|
||
|
||
/// Override the worker-thread count used by renderers created from now on (`None` = automatic).
|
||
pub fn set_default_threads(n: Option<u16>) {
|
||
THREADS_OVERRIDE.store(n.map_or(-1, i32::from), std::sync::atomic::Ordering::Relaxed);
|
||
}
|
||
|
||
/// Rasterizer worker threads: 0 on wasm; otherwise up to 4 (vello's sweet spot), leaving a core free.
|
||
pub fn default_threads() -> u16 {
|
||
#[cfg(target_arch = "wasm32")]
|
||
{
|
||
0
|
||
}
|
||
#[cfg(not(target_arch = "wasm32"))]
|
||
{
|
||
let o = THREADS_OVERRIDE.load(std::sync::atomic::Ordering::Relaxed);
|
||
if o >= 0 {
|
||
return o.min(64) as u16;
|
||
}
|
||
if std::env::var_os("VECTORCRAFT_RENDER_THREADS").is_some() {
|
||
return std::env::var("VECTORCRAFT_RENDER_THREADS").ok().and_then(|v| v.parse().ok()).unwrap_or(0);
|
||
}
|
||
std::thread::available_parallelism().map(|n| (n.get().saturating_sub(1)).min(4) as u16).unwrap_or(0)
|
||
}
|
||
}
|
||
|
||
/// Glyph outlines grouped by run, plus the whole text as one path.
|
||
struct TextGeom {
|
||
runs: Vec<BezPath>,
|
||
all: BezPath,
|
||
bounds: Rect,
|
||
/// The boxes of characters whose font is missing (drawn in a substitute), and of glyphs the
|
||
/// font lacks (drawn from a fallback font): Document Setup's substitution highlights.
|
||
substituted_fonts: BezPath,
|
||
substituted_glyphs: BezPath,
|
||
}
|
||
|
||
fn text_geom(t: &TextObject) -> TextGeom {
|
||
text_geom_snapped(t, None)
|
||
}
|
||
|
||
/// Glyph geometry of `t`; `snap` (text space → device pixels) puts the glyphs on whole pixels.
|
||
fn text_geom_snapped(t: &TextObject, snap: Option<Affine>) -> TextGeom {
|
||
let db = vectorcraft_text::FontDb::global();
|
||
let mut layout = vectorcraft_text::layout(db, t);
|
||
if let Some(xf) = snap {
|
||
layout.snap_to_pixels(xf);
|
||
}
|
||
let mut runs = vec![BezPath::new(); t.runs.len()];
|
||
let mut all = BezPath::new();
|
||
// Per run: is its family missing, and the face its glyphs should come from.
|
||
let faces: Vec<(bool, Option<u32>)> =
|
||
t.runs.iter().map(|r| (!db.has_family(&r.style.font_family), db.face(&r.style.font_family, &r.style.font_style).map(|f| f.id()))).collect();
|
||
let (mut substituted_fonts, mut substituted_glyphs) = (BezPath::new(), BezPath::new());
|
||
for g in &layout.glyphs {
|
||
if let Some(r) = runs.get_mut(g.run) {
|
||
r.extend(g.outline.iter());
|
||
}
|
||
all.extend(g.outline.iter());
|
||
let Some(&(missing, face)) = faces.get(g.run) else { continue };
|
||
let target = if missing {
|
||
&mut substituted_fonts
|
||
} else if face.is_some_and(|f| f != g.font_id) {
|
||
&mut substituted_glyphs
|
||
} else {
|
||
continue;
|
||
};
|
||
let Some(line) = layout.lines.get(g.line) else { continue };
|
||
let mut cell = Rect::new(g.origin.x, g.origin.y - line.ascent, g.origin.x + g.advance, g.origin.y + line.descent).to_path(0.1);
|
||
cell.apply_affine(Affine::rotate_about(g.angle, g.origin));
|
||
target.extend(cell.iter());
|
||
}
|
||
TextGeom { runs, all, bounds: layout.bounds, substituted_fonts, substituted_glyphs }
|
||
}
|
||
|
||
/// Document Setup's highlight behind substituted fonts and glyphs (screen only).
|
||
const SUBSTITUTED: peniko::Color = peniko::Color::from_rgba8(255, 120, 190, 110);
|
||
/// The pixel size of `region` rendered at `scale` pixels per point (at least 1×1).
|
||
pub fn region_pixels(region: Rect, scale: f64) -> (u32, u32) {
|
||
((region.width() * scale).round().max(1.0) as u32, (region.height() * scale).round().max(1.0) as u32)
|
||
}
|
||
|
||
fn rects_overlap(a: Rect, b: Rect) -> bool {
|
||
a.x0 <= b.x1 && b.x0 <= a.x1 && a.y0 <= b.y1 && b.y0 <= a.y1
|
||
}
|
||
|
||
fn fill_rule(r: FillRule) -> peniko::Fill {
|
||
match r {
|
||
FillRule::NonZero => peniko::Fill::NonZero,
|
||
FillRule::EvenOdd => peniko::Fill::EvenOdd,
|
||
}
|
||
}
|
||
|
||
pub(crate) fn blend_mode(b: vectorcraft_color::BlendMode) -> BlendMode {
|
||
use vectorcraft_color::BlendMode as B;
|
||
let mix = match b {
|
||
B::Normal => Mix::Normal,
|
||
B::Darken => Mix::Darken,
|
||
B::Multiply => Mix::Multiply,
|
||
B::ColorBurn => Mix::ColorBurn,
|
||
B::Lighten => Mix::Lighten,
|
||
B::Screen => Mix::Screen,
|
||
B::ColorDodge => Mix::ColorDodge,
|
||
B::Overlay => Mix::Overlay,
|
||
B::SoftLight => Mix::SoftLight,
|
||
B::HardLight => Mix::HardLight,
|
||
B::Difference => Mix::Difference,
|
||
B::Exclusion => Mix::Exclusion,
|
||
B::Hue => Mix::Hue,
|
||
B::Saturation => Mix::Saturation,
|
||
B::Color => Mix::Color,
|
||
B::Luminosity => Mix::Luminosity,
|
||
};
|
||
BlendMode::new(mix, Compose::SrcOver)
|
||
}
|
||
|
||
#[cfg(not(target_arch = "wasm32"))]
|
||
fn now() -> u64 {
|
||
use std::time::{SystemTime, UNIX_EPOCH};
|
||
SystemTime::now().duration_since(UNIX_EPOCH).map(|d| d.as_micros() as u64).unwrap_or(0)
|
||
}
|
||
#[cfg(target_arch = "wasm32")]
|
||
fn now() -> u64 {
|
||
0
|
||
}
|
||
|
||
#[cfg(test)]
|
||
mod tests;
|
||
#[cfg(test)]
|
||
mod tests_blend;
|
||
#[cfg(test)]
|
||
mod tests_charstroke;
|
||
#[cfg(test)]
|
||
mod tests_clip;
|
||
#[cfg(test)]
|
||
mod tests_cmykblend;
|
||
#[cfg(test)]
|
||
mod tests_container;
|
||
#[cfg(test)]
|
||
mod tests_freeform;
|
||
#[cfg(test)]
|
||
mod tests_isolation;
|
||
#[cfg(test)]
|
||
mod tests_knockout;
|
||
#[cfg(test)]
|
||
mod tests_objectfx;
|
||
#[cfg(test)]
|
||
mod tests_setup;
|
||
#[cfg(test)]
|
||
mod tests_strokegradient;
|
||
#[cfg(test)]
|
||
mod tests_tileedge;
|