mirror of
https://github.com/storytold/designcraft.git
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1309 lines
57 KiB
Rust
1309 lines
57 KiB
Rust
//! DesignCraft renderer: spreads → premultiplied RGBA pixels with `vello_cpu`.
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//!
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//! The renderer draws *document content only* (paper, page items, parent items, composed text,
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//! placed images). Non-printing chrome — guides, frame edges, ports, selection — is drawn by the
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//! UI as vector overlays so it stays crisp at any zoom.
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//!
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//! Callers pass a list of spreads with their placement on a shared canvas and a canvas → pixel
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//! view transform, so the UI can render exactly its viewport with every visible spread.
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#![forbid(unsafe_code)]
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use std::collections::HashMap;
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use std::sync::Arc;
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use designcraft_color::BlendMode as DcBlend;
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use designcraft_compose::{Cache, ComposedStory};
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use designcraft_doc::{Content, Document, Item, PageSide, SpreadRef, StoryId, StrokeAlign, StrokeType};
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use designcraft_geom::corners;
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use designcraft_geom::{Affine, BezPath, Rect, Shape, Vec2};
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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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pub use vello_cpu;
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pub mod damage;
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mod fx;
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/// How far (points) an object's soft effects reach outside its geometry.
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pub fn effect_outset(it: &Item) -> f64 {
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fx::outset(it)
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}
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pub mod glyphs;
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mod pdf_layers;
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pub use pdf_layers::{pdf_hide_layers, pdf_layers};
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pub mod images;
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mod text;
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/// A rendered image (premultiplied RGBA8, row-major).
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#[derive(Clone)]
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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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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.chunks_exact_mut(4) {
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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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pub fn to_png(&self) -> Vec<u8> {
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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()).expect("size");
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img.write_to(&mut std::io::Cursor::new(&mut buf), image::ImageFormat::Png).expect("png encode");
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buf
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}
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pub fn to_jpeg(&self, quality: u8) -> Vec<u8> {
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let rgba = self.to_straight();
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let rgb: Vec<u8> = rgba
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.chunks_exact(4)
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.flat_map(|p| {
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let a = p[3] as u32;
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let mix = |c: u8| ((c as u32 * a + 255 * (255 - a)) / 255) as u8;
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[mix(p[0]), mix(p[1]), mix(p[2])]
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})
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.collect();
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let mut buf = Vec::new();
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let enc = image::codecs::jpeg::JpegEncoder::new_with_quality(&mut buf, quality.clamp(1, 100));
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let _ = image::ImageEncoder::write_image(enc, &rgb, self.width, self.height, image::ExtendedColorType::Rgb8);
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buf
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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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/// What to draw.
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#[derive(Clone, Debug)]
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pub struct RenderOptions {
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/// Canvas background (premultiplied RGBA8); `None` = transparent.
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pub background: Option<[u8; 4]>,
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/// Fill pages with paper colour.
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pub paper: bool,
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/// Skip non-printing items and layers (Preview mode, export).
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pub printing_only: bool,
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/// Items not to draw (live drag previews).
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pub hidden: Vec<designcraft_doc::ItemId>,
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/// Draw text smaller than this many pixels as grey bars ("greeking"); 0 = never.
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pub greek_below_px: f64,
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/// Drop shadow on pages (screen view).
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pub page_shadow: bool,
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/// Pink highlight behind text set in fonts that aren't installed (screen view).
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pub highlight_missing_fonts: bool,
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/// Preferences › Composition: yellow behind lines whose word spacing breaks the paragraph's
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/// limits (darker = worse), green behind text with custom tracking or kerning (screen view).
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pub highlight_hj: bool,
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pub highlight_keeps: bool,
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pub highlight_custom_tracking: bool,
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/// Conditional text indicators: an underline in each condition's colour (screen view).
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pub condition_indicators: bool,
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/// Editorial note anchors (screen view).
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pub note_indicators: bool,
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/// Track Changes: added text highlighted (screen view).
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pub change_markup: bool,
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/// View › Structure › Show Tag Markers: brackets around inline-tagged text (screen view).
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pub tag_markers: bool,
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/// View › Display Performance.
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pub quality: DisplayQuality,
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/// Preferences › Appearance of Black: show 100% K as rich (pure) black instead of the
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/// accurate dark grey.
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pub rich_black: bool,
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/// View › Overprint Preview: overprinting inks mix with what's beneath.
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pub overprint_preview: bool,
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}
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/// View › Display Performance: how placed graphics and effects are drawn on screen.
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#[derive(Clone, Copy, Debug, Default, PartialEq, Eq, serde::Serialize, serde::Deserialize)]
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#[serde(rename_all = "camelCase")]
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pub enum DisplayQuality {
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/// Graphics as grey boxes, no transparency effects.
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Fast,
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/// Low-resolution proxies (72 ppi at 100%).
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Typical,
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/// Full resolution.
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#[default]
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High,
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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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background: None,
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paper: true,
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printing_only: false,
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hidden: vec![],
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greek_below_px: 0.0,
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page_shadow: false,
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highlight_missing_fonts: false,
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highlight_hj: false,
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highlight_keeps: false,
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highlight_custom_tracking: false,
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condition_indicators: false,
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note_indicators: false,
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change_markup: false,
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tag_markers: false,
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quality: DisplayQuality::High,
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rich_black: false,
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overprint_preview: false,
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}
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}
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}
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/// A spread placed on the canvas: canvas = spread + offset.
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#[derive(Clone, Copy, Debug, PartialEq)]
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pub struct Placed {
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pub spread: SpreadRef,
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pub offset: Vec2,
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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 items: usize,
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pub glyphs: usize,
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pub micros: u64,
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}
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/// Reusable renderer: keeps the render context, the frame-space glyph paths of composed text
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/// and (process-wide) decoded images between renders.
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pub struct Renderer {
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ctx: Option<RenderContext>,
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resources: Resources,
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glyphs: text::GlyphCache,
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/// Composed stories looked up during the current render.
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stories: HashMap<(StoryId, Option<String>), Arc<ComposedStory>>,
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pub threads: u16,
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pub stats: FrameStats,
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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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pub(crate) struct Frame<'a> {
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doc: &'a Document,
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cache: &'a Cache,
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view: Affine,
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/// Visible area in spread space.
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visible: Rect,
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/// Size of a device pixel in points.
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px: f64,
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opts: &'a RenderOptions,
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/// Drawing into a multithreaded context (no filter layers).
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mt: bool,
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}
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pub fn default_threads() -> u16 {
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#[cfg(target_arch = "wasm32")]
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{
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0
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}
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#[cfg(not(target_arch = "wasm32"))]
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{
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if let Some(n) = std::env::var("DESIGNCRAFT_RENDER_THREADS").ok().and_then(|v| v.parse().ok()) {
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return n;
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}
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std::thread::available_parallelism().map(|n| (n.get().saturating_sub(1)).clamp(0, 8) as u16).unwrap_or(0)
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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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ctx: None,
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resources: Resources::new(),
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glyphs: text::GlyphCache::default(),
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stories: HashMap::new(),
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threads: default_threads(),
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stats: FrameStats::default(),
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}
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}
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/// Drop cached glyph paths (they are rebuilt on demand).
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pub fn clear_caches(&mut self) {
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self.glyphs.clear();
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self.stories.clear();
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}
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/// Number of text frames whose glyph paths are cached.
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pub fn cached_frames(&self) -> usize {
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self.glyphs.len()
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}
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/// Render the given spreads into a `width`×`height` image with `view` (canvas → pixels).
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pub fn render(
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&mut self,
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doc: &Document,
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cache: &Cache,
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spreads: &[Placed],
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width: u32,
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height: u32,
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view: Affine,
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opts: &RenderOptions,
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) -> Rendered {
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let start = now();
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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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let mut ctx = match self.ctx.take() {
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Some(mut c) if c.width() == w && c.height() == h && c.render_settings().num_threads == self.threads => {
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c.reset();
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c
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}
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_ => RenderContext::new_with(w, h, vello_cpu::RenderSettings { num_threads: self.threads, ..Default::default() }),
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};
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let mt = ctx.render_settings().num_threads > 0;
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RICH_BLACK.with(|r| r.set(opts.rich_black));
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self.stats = FrameStats::default();
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self.stories.clear();
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self.glyphs.tick();
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if let Some(bg) = opts.background {
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ctx.set_transform(Affine::IDENTITY);
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ctx.set_paint(peniko::Color::from_rgba8(bg[0], bg[1], bg[2], bg[3]));
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ctx.fill_rect(&kurbo::Rect::new(0.0, 0.0, w as f64, h as f64));
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}
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let px = 1.0 / view.determinant().abs().sqrt().max(1e-12);
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let canvas_visible = view.inverse().transform_rect_bbox(Rect::new(0.0, 0.0, w as f64, h as f64));
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for pl in spreads {
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let Some(sp) = doc.spread(pl.spread) else { continue };
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let sview = view * Affine::translate(pl.offset);
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let visible = canvas_visible - pl.offset;
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let bounds = sp.bounds();
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// Cull spreads far outside the viewport (pasteboard items may extend; allow a margin).
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if !rect_overlaps(bounds.inflate(2000.0, 2000.0), visible) {
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continue;
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}
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let f = Frame { doc, cache, view: sview, visible, px, opts, mt };
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self.draw_spread(&mut ctx, &f, pl.spread);
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}
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ctx.flush();
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// Render straight into the returned buffer (no extra copy of the frame).
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let mut pixels = vec![0u8; w as usize * h as usize * 4];
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ctx.render(vello_cpu::PixmapMut::new(w, h, &mut pixels).expect("buffer size"), &mut self.resources);
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self.ctx = Some(ctx);
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self.stories.clear();
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self.stats.micros = now().saturating_sub(start);
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Rendered { width: w as u32, height: h as u32, pixels }
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}
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/// Render one document page (absolute index) at `scale` px/pt, optionally including bleed.
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pub fn render_page(&mut self, doc: &Document, cache: &Cache, abs: usize, scale: f64, bleed: bool, opts: &RenderOptions) -> Option<Rendered> {
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let (si, pi) = doc.page_loc(abs)?;
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let page = &doc.spreads[si].pages[pi];
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let mut r = page.bounds();
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if bleed {
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let b = doc.settings.bleed;
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let (l, rr) = if page.side == PageSide::Left { (b[3], b[2]) } else { (b[2], b[3]) };
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r = Rect::new(r.x0 - l, r.y0 - b[0], r.x1 + rr, r.y1 + b[1]);
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}
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let w = (r.width() * scale).round().max(1.0) as u32;
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let h = (r.height() * scale).round().max(1.0) as u32;
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let view = Affine::scale(scale) * Affine::translate(-r.origin().to_vec2());
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let mut o = opts.clone();
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o.background = Some([255, 255, 255, 255]);
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Some(self.render(doc, cache, &[Placed { spread: SpreadRef::Doc(si), offset: Vec2::ZERO }], w, h, view, &o))
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}
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fn draw_spread(&mut self, ctx: &mut RenderContext, f: &Frame, sr: SpreadRef) {
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let doc = f.doc;
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let Some(sp) = doc.spread(sr) else { return };
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// Paper.
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if f.opts.paper {
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let paper = doc.resolve_color(designcraft_color::swatch::PAPER, 1.0).unwrap_or(designcraft_color::Color::WHITE);
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if f.opts.page_shadow {
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ctx.set_transform(f.view);
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ctx.set_paint(peniko::Color::from_rgba8(0, 0, 0, 90));
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for p in &sp.pages {
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let s = 3.0 * f.px;
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ctx.fill_rect(&(p.bounds() + Vec2::new(s, s)));
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}
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}
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ctx.set_transform(f.view);
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ctx.set_paint(color_of(&paper, 1.0));
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// One rect for equal-height spreads avoids an anti-aliasing seam at the spine.
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if sp.pages.windows(2).all(|w| w[0].height == w[1].height) {
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ctx.fill_rect(&sp.bounds());
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} else {
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for p in &sp.pages {
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ctx.fill_rect(&p.bounds());
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}
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}
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}
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// Layers back to front; within each layer parent items first (document spreads only).
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for layer in doc.layers.iter().rev() {
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if !layer.visible || f.opts.printing_only && !layer.printable {
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continue;
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}
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if let SpreadRef::Doc(si) = sr {
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let first = doc.first_page_of_spread(si);
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for (pi, page) in sp.pages.iter().enumerate() {
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if !page.show_parent_items {
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continue;
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}
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let Some((ppi, ppage)) = doc.parent_page_for(first + pi) else { continue };
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let parent = &doc.parents[ppi];
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let dx = page.x - parent.pages[ppage].x;
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let page_name = doc.page_name(first + pi);
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let pr = parent.pages[ppage].bounds();
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for it in &parent.items {
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if it.layer != layer.id || page.overridden.contains(&it.id) {
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continue;
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}
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// Parent items belong to the parent page they sit on.
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if parent.page_at_x(it.bounds().center().x) != Some(ppage) && parent.pages.len() > 1 {
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continue;
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}
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let _ = pr;
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self.draw_item(ctx, f, it, Affine::translate((dx, 0.0)), Some(&page_name));
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}
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}
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}
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for it in &sp.items {
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if it.layer == layer.id {
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self.draw_item(ctx, f, it, Affine::IDENTITY, None);
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}
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}
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}
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}
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fn draw_item(&mut self, ctx: &mut RenderContext, f: &Frame, it: &Item, parent: Affine, page_name: Option<&str>) {
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if it.hidden || f.opts.hidden.contains(&it.id) || f.opts.printing_only && it.nonprinting {
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return;
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}
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let xf = parent * it.xf;
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let vb = xf.transform_rect_bbox(it.inner_bounds()).inflate(it.stroke.extent() + 2.0, it.stroke.extent() + 2.0);
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if it.has_nested_items() {
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// A frame with items pasted into it: fill, the items clipped to the frame, stroke.
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if !rect_overlaps(vb, f.visible) {
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return;
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}
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let bp = if it.corners.is_none() { it.path.to_bezpath() } else { corners::apply(&it.path, &it.corners) };
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let layered = it.opacity < 0.999 || it.blend != DcBlend::Normal;
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if layered {
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ctx.set_transform(Affine::IDENTITY);
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ctx.push_layer(None, Some(blend_mode(it.blend)), Some(it.opacity), None, None);
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}
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if !it.fill.is_none() {
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ctx.set_transform(f.view * xf);
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if set_fill_paint(ctx, f.doc, &it.fill, bp.bounding_box()) {
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ctx.fill_path(&bp);
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}
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ctx.reset_paint_transform();
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}
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ctx.set_transform(f.view * xf);
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ctx.push_clip_layer(&bp);
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for c in it.children() {
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self.draw_item(ctx, f, c, xf, page_name);
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}
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ctx.pop_layer();
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if !it.stroke.is_none() {
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self.draw_stroke(ctx, f, it, &bp, xf);
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}
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if layered {
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ctx.pop_layer();
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}
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return;
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}
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if !it.children().is_empty() {
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// Groups: children carry their own transforms relative to the group.
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// Isolate Blending / Knockout: the group is its own layer (blend modes stop at it).
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let layered = it.opacity < 0.999 || it.blend != DcBlend::Normal || it.isolate || it.knockout;
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if layered {
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ctx.set_transform(Affine::IDENTITY);
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ctx.push_layer(None, Some(blend_mode(it.blend)), Some(it.opacity), None, None);
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}
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if it.knockout {
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// Knockout: each object first clears its area of those behind it, so it composites
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// with the group's backdrop rather than with its siblings.
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for c in it.shown_children() {
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if !c.hidden {
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ctx.set_transform(Affine::IDENTITY);
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ctx.push_layer(None, Some(BlendMode::new(Mix::Normal, Compose::DestOut)), None, None, None);
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ctx.set_transform(f.view * xf * c.xf);
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ctx.set_paint(peniko::Color::BLACK);
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ctx.fill_path(&c.path.to_bezpath());
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ctx.pop_layer();
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}
|
||
self.draw_item(ctx, f, c, xf, page_name);
|
||
}
|
||
} else {
|
||
for c in it.shown_children() {
|
||
self.draw_item(ctx, f, c, xf, page_name);
|
||
}
|
||
}
|
||
if layered {
|
||
ctx.pop_layer();
|
||
}
|
||
return;
|
||
}
|
||
// Composed text stays inside its frame apart from glyph overhang (italics, swashes, big
|
||
// initials), so text frames get a margin rather than being exempt from culling.
|
||
let margin = match it.content {
|
||
Content::Text(_) => 36.0 + 0.25 * vb.width().max(vb.height()),
|
||
_ => 0.0,
|
||
};
|
||
let effects = it.effects.any() && f.opts.quality != DisplayQuality::Fast;
|
||
let fx_outset = if effects { fx::outset(it) } else { 0.0 };
|
||
if !rect_overlaps(vb.inflate(margin + fx_outset, margin + fx_outset), f.visible) {
|
||
return;
|
||
}
|
||
self.stats.items += 1;
|
||
let bp = if it.corners.is_none() { it.path.to_bezpath() } else { corners::apply(&it.path, &it.corners) };
|
||
let layered = it.opacity < 0.999 || it.blend != DcBlend::Normal;
|
||
if layered {
|
||
ctx.set_transform(Affine::IDENTITY);
|
||
ctx.push_layer(None, Some(blend_mode(it.blend)), Some(it.opacity), None, None);
|
||
}
|
||
if effects {
|
||
self.draw_item_fx(ctx, f, it, &bp, xf, page_name);
|
||
} else {
|
||
self.draw_body(ctx, f, it, &bp, xf, page_name);
|
||
}
|
||
if layered {
|
||
ctx.pop_layer();
|
||
}
|
||
}
|
||
|
||
/// The composed story for a frame (memoised for the current render: the cache lookup
|
||
/// validates the whole thread each time).
|
||
fn story(&mut self, f: &Frame, sid: StoryId, page_name: Option<&str>) -> Arc<ComposedStory> {
|
||
let key = (sid, page_name.map(str::to_string));
|
||
if let Some(cs) = self.stories.get(&key) {
|
||
return cs.clone();
|
||
}
|
||
let cs = f.cache.get(f.doc, sid, page_name);
|
||
self.stories.insert(key, cs.clone());
|
||
cs
|
||
}
|
||
|
||
/// Fill, content and stroke of a leaf item (no opacity, blend or effects).
|
||
pub(crate) fn draw_body(&mut self, ctx: &mut RenderContext, f: &Frame, it: &Item, bp: &BezPath, xf: Affine, page_name: Option<&str>) {
|
||
let doc = f.doc;
|
||
// Fill.
|
||
if !it.fill.is_none() {
|
||
ctx.set_transform(f.view * xf);
|
||
let op = overprints(f, &it.fill.swatch, it.fill.tint, it.fill.overprint);
|
||
if op {
|
||
ctx.push_layer(None, Some(BlendMode::new(Mix::Multiply, Compose::SrcOver)), None, None, None);
|
||
}
|
||
if set_fill_paint(ctx, doc, &it.fill, bp.bounding_box()) && it.path.is_closed() {
|
||
ctx.fill_path(bp);
|
||
}
|
||
ctx.reset_paint_transform();
|
||
if op {
|
||
ctx.pop_layer();
|
||
}
|
||
}
|
||
// Content.
|
||
match &it.content {
|
||
Content::Graphic(g) => {
|
||
let g = &if it.media.is_some() { it.drawn_graphic(&f.doc.assets).unwrap_or_else(|| g.clone()) } else { g.clone() };
|
||
ctx.set_transform(f.view * xf);
|
||
ctx.push_clip_layer(bp);
|
||
if !it.pdf_hidden_layers.is_empty() {
|
||
HIDDEN_LAYERS.with(|h| *h.borrow_mut() = it.pdf_hidden_layers.clone());
|
||
}
|
||
self.draw_graphic(ctx, f, g, xf);
|
||
if !it.pdf_hidden_layers.is_empty() {
|
||
HIDDEN_LAYERS.with(|h| h.borrow_mut().clear());
|
||
}
|
||
ctx.pop_layer();
|
||
}
|
||
Content::Text(tf) => {
|
||
let cs = self.story(f, tf.story, page_name);
|
||
if let Some(ft) = cs.frame(it.id) {
|
||
match &tf.options.path {
|
||
Some(pt) => self.draw_path_text(ctx, f, &cs, ft, xf, bp, pt),
|
||
None => self.draw_text(ctx, f, &cs, ft, xf * it.text_local()),
|
||
}
|
||
}
|
||
}
|
||
_ => {}
|
||
}
|
||
// Form fields (screen only; PDF viewers draw their own): a tint, a check mark.
|
||
if let Some(ff) = &it.form_field
|
||
&& !f.opts.printing_only
|
||
{
|
||
let r = it.inner_bounds();
|
||
ctx.set_transform(f.view * xf);
|
||
ctx.set_paint(peniko::Color::from_rgba8(80, 140, 255, 40));
|
||
ctx.fill_rect(&r);
|
||
ctx.set_paint(peniko::Color::from_rgba8(60, 110, 220, 200));
|
||
ctx.set_stroke(kurbo::Stroke::new(0.75));
|
||
ctx.stroke_path(&r.to_path(0.1));
|
||
if ff.kind == designcraft_doc::FieldKind::CheckBox && !ff.value.is_empty() && ff.value != "Off" {
|
||
let (w, h) = (r.width(), r.height());
|
||
let mut c = BezPath::new();
|
||
c.move_to((r.x0 + w * 0.22, r.y0 + h * 0.48));
|
||
c.line_to((r.x0 + w * 0.42, r.y0 + h * 0.72));
|
||
c.line_to((r.x0 + w * 0.78, r.y0 + h * 0.24));
|
||
ctx.set_paint(peniko::Color::BLACK);
|
||
ctx.set_stroke(kurbo::Stroke::new((w.min(h) * 0.12).max(0.8)).with_caps(kurbo::Cap::Round).with_join(kurbo::Join::Round));
|
||
ctx.stroke_path(&c);
|
||
}
|
||
}
|
||
// Stroke.
|
||
if !it.stroke.is_none() {
|
||
let op = overprints(f, &it.stroke.swatch, it.stroke.tint, it.stroke.overprint);
|
||
if op {
|
||
ctx.set_transform(f.view * xf);
|
||
ctx.push_layer(None, Some(BlendMode::new(Mix::Multiply, Compose::SrcOver)), None, None, None);
|
||
}
|
||
self.draw_stroke(ctx, f, it, bp, xf);
|
||
if op {
|
||
ctx.pop_layer();
|
||
}
|
||
}
|
||
}
|
||
|
||
fn draw_stroke(&mut self, ctx: &mut RenderContext, f: &Frame, it: &Item, bp: &BezPath, xf: Affine) {
|
||
let st = &it.stroke;
|
||
let Some(c) = f.doc.resolve_color(&st.swatch, st.tint) else { return };
|
||
let mut stroke = kurbo::Stroke::new(st.weight)
|
||
.with_caps(match st.cap {
|
||
designcraft_doc::Cap::Butt => kurbo::Cap::Butt,
|
||
designcraft_doc::Cap::Round => kurbo::Cap::Round,
|
||
designcraft_doc::Cap::Projecting => kurbo::Cap::Square,
|
||
})
|
||
.with_join(match st.join {
|
||
designcraft_doc::Join::Miter => kurbo::Join::Miter,
|
||
designcraft_doc::Join::Round => kurbo::Join::Round,
|
||
designcraft_doc::Join::Bevel => kurbo::Join::Bevel,
|
||
})
|
||
.with_miter_limit(st.miter_limit);
|
||
let kind = f.doc.stroke_kind(&st.kind);
|
||
match &kind {
|
||
StrokeType::Dashed { pattern } if !pattern.is_empty() => stroke = stroke.with_dashes(0.0, pattern.iter().copied()),
|
||
StrokeType::Dotted => stroke = stroke.with_dashes(0.0, [0.0, st.weight * 2.0]).with_caps(kurbo::Cap::Round),
|
||
_ => {}
|
||
}
|
||
ctx.set_transform(f.view * xf);
|
||
ctx.set_paint(color_of(&c, 1.0));
|
||
let closed = it.path.is_closed();
|
||
// Arrowheads: the path is shortened under them; they're drawn after it.
|
||
let arrows = designcraft_doc::arrow::apply(bp, st, closed);
|
||
let bp = arrows.as_ref().map_or(bp, |a| &a.0);
|
||
// Gap colour under dashes and dots: the whole path, undashed.
|
||
let gap = if matches!(kind, StrokeType::Solid) { None } else { f.doc.resolve_color(&st.gap_swatch, st.gap_tint) };
|
||
if let Some(g) = gap
|
||
&& !matches!(st.align, StrokeAlign::Inside | StrokeAlign::Outside if closed)
|
||
{
|
||
let op = overprints(f, &st.gap_swatch, st.gap_tint, st.gap_overprint);
|
||
if op {
|
||
ctx.set_transform(Affine::IDENTITY);
|
||
ctx.push_layer(None, Some(BlendMode::new(Mix::Multiply, Compose::SrcOver)), None, None, None);
|
||
ctx.set_transform(f.view * xf);
|
||
}
|
||
ctx.set_paint(color_of(&g, 1.0));
|
||
ctx.set_stroke(kurbo::Stroke {
|
||
dash_pattern: Default::default(),
|
||
start_cap: kurbo::Cap::Butt,
|
||
end_cap: kurbo::Cap::Butt,
|
||
..stroke.clone()
|
||
});
|
||
ctx.stroke_path(bp);
|
||
if op {
|
||
ctx.pop_layer();
|
||
}
|
||
ctx.set_paint(color_of(&c, 1.0));
|
||
}
|
||
// Stripes, wavy and hash strokes are fills (along the path's centre line).
|
||
if let Some(o) = kind.outline(bp, st.weight, 0.05 * f.px) {
|
||
ctx.fill_path(&o);
|
||
for h in arrows.iter().flat_map(|a| &a.1) {
|
||
match h.outline {
|
||
Some(w) => {
|
||
ctx.set_stroke(kurbo::Stroke::new(w).with_join(kurbo::Join::Miter));
|
||
ctx.stroke_path(&h.path);
|
||
}
|
||
None => ctx.fill_path(&h.path),
|
||
}
|
||
}
|
||
return;
|
||
}
|
||
match st.align {
|
||
StrokeAlign::Inside if closed => {
|
||
// Clip a double-width stroke to the path.
|
||
ctx.push_clip_layer(bp);
|
||
ctx.set_stroke(kurbo::Stroke { width: st.weight * 2.0, ..stroke });
|
||
ctx.stroke_path(bp);
|
||
ctx.pop_layer();
|
||
}
|
||
StrokeAlign::Outside if closed => {
|
||
let outline =
|
||
kurbo::stroke(bp.iter(), &kurbo::Stroke { width: st.weight * 2.0, ..stroke }, &kurbo::StrokeOpts::default(), 0.05 * f.px);
|
||
let mut p = outline;
|
||
// Remove the interior: even-odd with the path itself.
|
||
for el in bp.elements() {
|
||
p.push(*el);
|
||
}
|
||
ctx.set_fill_rule(peniko::Fill::EvenOdd);
|
||
ctx.fill_path(&p);
|
||
ctx.set_fill_rule(peniko::Fill::NonZero);
|
||
}
|
||
_ => {
|
||
ctx.set_stroke(stroke);
|
||
ctx.stroke_path(bp);
|
||
}
|
||
}
|
||
for h in arrows.iter().flat_map(|a| &a.1) {
|
||
match h.outline {
|
||
Some(w) => {
|
||
ctx.set_stroke(kurbo::Stroke::new(w).with_join(kurbo::Join::Miter));
|
||
ctx.stroke_path(&h.path);
|
||
}
|
||
None => ctx.fill_path(&h.path),
|
||
}
|
||
}
|
||
}
|
||
|
||
pub(crate) fn draw_graphic(&mut self, ctx: &mut RenderContext, f: &Frame, g: &designcraft_doc::Graphic, xf: Affine) {
|
||
let Some(asset) = f.doc.assets.get(&g.asset) else { return };
|
||
if designcraft_doc::media_kind(&asset.mime).is_some() {
|
||
// Video / sound: a dark frame with a play mark (the poster, when set, is drawn by the item).
|
||
ctx.set_transform(f.view * xf * g.xf);
|
||
ctx.set_paint(peniko::Color::from_rgba8(48, 48, 52, 255));
|
||
ctx.fill_rect(&Rect::new(0.0, 0.0, g.size.0, g.size.1));
|
||
let (cx, cy, r) = (g.size.0 / 2.0, g.size.1 / 2.0, g.size.0.min(g.size.1) * 0.18);
|
||
let mut tri = BezPath::new();
|
||
tri.move_to((cx - r * 0.6, cy - r));
|
||
tri.line_to((cx + r, cy));
|
||
tri.line_to((cx - r * 0.6, cy + r));
|
||
tri.close_path();
|
||
ctx.set_paint(peniko::Color::from_rgba8(235, 235, 235, 255));
|
||
ctx.fill_path(&tri);
|
||
return;
|
||
}
|
||
if f.opts.quality == DisplayQuality::Fast {
|
||
ctx.set_transform(f.view * xf * g.xf);
|
||
ctx.set_paint(peniko::Color::from_rgba8(178, 178, 178, 255));
|
||
ctx.fill_rect(&Rect::new(0.0, 0.0, g.size.0, g.size.1));
|
||
return;
|
||
}
|
||
// Pick a mip level close to the on-screen size (Typical: a 72 ppi proxy).
|
||
let on_screen = (f.view * xf * g.xf).determinant().abs().sqrt();
|
||
let on_screen = if f.opts.quality == DisplayQuality::Typical { on_screen.min(1.0) } else { on_screen };
|
||
let hidden = HIDDEN_LAYERS.with(|h| h.borrow().clone());
|
||
let data = if !hidden.is_empty() && is_pdf(&asset.data) { pdf_layers::layered(&asset.data, &hidden) } else { asset.data.clone() };
|
||
let Some(pm) = images::mip(&data, asset.page, g.size.0, on_screen) else { return };
|
||
let rect = Rect::new(0.0, 0.0, g.size.0, g.size.1);
|
||
ctx.set_transform(f.view * xf * g.xf);
|
||
let sx = g.size.0 / pm.width().max(1) as f64;
|
||
let sy = g.size.1 / pm.height().max(1) as f64;
|
||
ctx.set_paint(vello_cpu::Image {
|
||
image: vello_cpu::ImageSource::Pixmap(pm),
|
||
sampler: peniko::ImageSampler::default().with_quality(peniko::ImageQuality::Medium),
|
||
});
|
||
ctx.set_paint_transform(Affine::scale_non_uniform(sx, sy));
|
||
ctx.fill_rect(&rect);
|
||
ctx.reset_paint_transform();
|
||
}
|
||
}
|
||
|
||
fn rect_overlaps(a: Rect, b: Rect) -> bool {
|
||
a.x0 < b.x1 && a.x1 > b.x0 && a.y0 < b.y1 && a.y1 > b.y0
|
||
}
|
||
|
||
thread_local! {
|
||
/// Object Layer Options of the placed PDF being drawn.
|
||
static HIDDEN_LAYERS: std::cell::RefCell<Vec<String>> = const { std::cell::RefCell::new(Vec::new()) };
|
||
/// Appearance of Black for the render on this thread: 100% K as pure black.
|
||
static RICH_BLACK: std::cell::Cell<bool> = const { std::cell::Cell::new(false) };
|
||
}
|
||
|
||
pub fn color_of(c: &designcraft_color::Color, alpha: f32) -> peniko::Color {
|
||
if RICH_BLACK.with(|r| r.get())
|
||
&& let designcraft_color::Color::Cmyk { c: cc, m, y, k } = *c
|
||
&& cc <= 1e-3
|
||
&& m <= 1e-3
|
||
&& y <= 1e-3
|
||
&& k >= 0.999
|
||
{
|
||
return peniko::Color::from_rgba8(0, 0, 0, (alpha.clamp(0.0, 1.0) * 255.0).round() as u8);
|
||
}
|
||
let [r, g, b, a] = c.to_rgba8(alpha);
|
||
peniko::Color::from_rgba8(r, g, b, a)
|
||
}
|
||
|
||
/// Set a swatch fill (solid or gradient) as the paint. Returns false for [None]/unknown.
|
||
fn set_fill_paint(ctx: &mut RenderContext, doc: &Document, fill: &designcraft_doc::Fill, bounds: Rect) -> bool {
|
||
let (swatch, tint, angle) = (fill.swatch.as_str(), fill.tint, fill.gradient_angle);
|
||
if let Some(g) = designcraft_color::swatch::resolve_gradient(&doc.swatches, swatch) {
|
||
let stops: Vec<peniko::ColorStop> = g.expanded_stops().iter().map(|(o, c, a)| peniko::ColorStop::from((*o, color_of(c, *a)))).collect();
|
||
if stops.is_empty() {
|
||
return false;
|
||
}
|
||
let c = bounds.center();
|
||
let grad = match (g.kind, fill.gradient_vector) {
|
||
(designcraft_color::GradientKind::Radial, Some([x0, y0, x1, y1])) => {
|
||
let r = Vec2::new(x1 - x0, y1 - y0).hypot().max(1e-3);
|
||
peniko::Gradient::new_radial((x0, y0), r as f32).with_stops(stops.as_slice())
|
||
}
|
||
(_, Some([x0, y0, x1, y1])) => peniko::Gradient::new_linear((x0, y0), (x1, y1)).with_stops(stops.as_slice()),
|
||
(designcraft_color::GradientKind::Radial, None) => {
|
||
let r = bounds.width().max(bounds.height()) / 2.0;
|
||
peniko::Gradient::new_radial(c, r as f32).with_stops(stops.as_slice())
|
||
}
|
||
_ => {
|
||
let a = angle.unwrap_or(0.0).to_radians();
|
||
let half = (bounds.width() * a.cos().abs() + bounds.height() * a.sin().abs()) / 2.0;
|
||
let d = Vec2::new(a.cos(), -a.sin()) * half;
|
||
peniko::Gradient::new_linear(c - d, c + d).with_stops(stops.as_slice())
|
||
}
|
||
};
|
||
ctx.set_paint(grad);
|
||
return true;
|
||
}
|
||
match doc.resolve_color(swatch, tint) {
|
||
Some(c) => {
|
||
ctx.set_paint(color_of(&c, 1.0));
|
||
true
|
||
}
|
||
None => false,
|
||
}
|
||
}
|
||
|
||
/// Overprint Preview: does this paint overprint (its own flag, or 100% [Black], which
|
||
/// overprints by default)? It's then multiplied over what's beneath.
|
||
pub(crate) fn overprints(f: &Frame, swatch: &str, tint: f32, flag: bool) -> bool {
|
||
f.opts.overprint_preview && (flag || (f.doc.settings.overprint_black && swatch == designcraft_color::swatch::BLACK && tint >= 0.999))
|
||
}
|
||
|
||
pub fn blend_mode(b: DcBlend) -> BlendMode {
|
||
use DcBlend 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)
|
||
}
|
||
|
||
/// Decode encoded image bytes into a premultiplied pixmap.
|
||
pub fn decode_pixmap(bytes: &[u8]) -> Option<Pixmap> {
|
||
decode_pixmap_page(bytes, 0)
|
||
}
|
||
|
||
/// [`decode_pixmap`] for page `page` of a PDF (other formats have one page).
|
||
pub fn decode_pixmap_page(bytes: &[u8], page: u32) -> Option<Pixmap> {
|
||
if is_pdf(bytes) {
|
||
return render_pdf_page(bytes, page as usize, 3000);
|
||
}
|
||
if designcraft_images::is_svg(bytes) {
|
||
let (px, w, h) = designcraft_images::render_svg(bytes, 3000)?;
|
||
let data = px.chunks_exact(4).map(|p| vello_cpu::color::PremulRgba8 { r: p[0], g: p[1], b: p[2], a: p[3] }).collect();
|
||
return Some(Pixmap::from_parts(data, w.min(u16::MAX as u32) as u16, h.min(u16::MAX as u32) as u16));
|
||
}
|
||
let img = designcraft_images::decode_rgba(bytes)?;
|
||
let (w, h) = img.dimensions();
|
||
if w == 0 || h == 0 || w > u16::MAX as u32 || h > u16::MAX as u32 {
|
||
return None;
|
||
}
|
||
let data: Vec<vello_cpu::color::PremulRgba8> = img
|
||
.pixels()
|
||
.map(|p| {
|
||
let a = p[3] as u16;
|
||
let m = |c: u8| ((c as u16 * a + 127) / 255) as u8;
|
||
vello_cpu::color::PremulRgba8 { r: m(p[0]), g: m(p[1]), b: m(p[2]), a: p[3] }
|
||
})
|
||
.collect();
|
||
Some(Pixmap::from_parts(data, w as u16, h as u16))
|
||
}
|
||
|
||
/// Box-filter downsample by 2.
|
||
fn halve(pm: &Pixmap) -> Pixmap {
|
||
let (w, h) = (pm.width() as usize, pm.height() as usize);
|
||
let (nw, nh) = ((w / 2).max(1), (h / 2).max(1));
|
||
let src = pm.data();
|
||
let mut out = Vec::with_capacity(nw * nh);
|
||
for y in 0..nh {
|
||
for x in 0..nw {
|
||
let mut acc = [0u32; 4];
|
||
for (dx, dy) in [(0, 0), (1, 0), (0, 1), (1, 1)] {
|
||
let sx = (2 * x + dx).min(w - 1);
|
||
let sy = (2 * y + dy).min(h - 1);
|
||
let p = src[sy * w + sx];
|
||
acc[0] += p.r as u32;
|
||
acc[1] += p.g as u32;
|
||
acc[2] += p.b as u32;
|
||
acc[3] += p.a as u32;
|
||
}
|
||
out.push(vello_cpu::color::PremulRgba8 { r: (acc[0] / 4) as u8, g: (acc[1] / 4) as u8, b: (acc[2] / 4) as u8, a: (acc[3] / 4) as u8 });
|
||
}
|
||
}
|
||
Pixmap::from_parts(out, nw as u16, nh as u16)
|
||
}
|
||
|
||
#[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
|
||
}
|
||
|
||
/// Pixel size of an encoded image without decoding it fully.
|
||
pub fn image_size(bytes: &[u8]) -> Option<(u32, u32)> {
|
||
if is_pdf(bytes) {
|
||
// Placed PDFs are sized by their page (crop box) in points.
|
||
return pdf_page_size(bytes, 0).map(|(w, h)| (w.round().max(1.0) as u32, h.round().max(1.0) as u32));
|
||
}
|
||
if designcraft_images::is_svg(bytes) {
|
||
// SVGs by their width and height (CSS pixels → points).
|
||
return designcraft_images::natural_size(bytes).map(|(w, h)| (w.round().max(1.0) as u32, h.round().max(1.0) as u32));
|
||
}
|
||
designcraft_images::pixel_size(bytes)
|
||
}
|
||
|
||
/// MIME type guess for encoded image bytes.
|
||
/// Is this a PDF file (placed PDFs are graphics)?
|
||
pub fn is_pdf(bytes: &[u8]) -> bool {
|
||
bytes.starts_with(b"%PDF")
|
||
}
|
||
|
||
/// Page count of a PDF.
|
||
pub fn pdf_page_count(bytes: &[u8]) -> Option<usize> {
|
||
let pdf = hayro::hayro_syntax::Pdf::new(std::sync::Arc::new(bytes.to_vec())).ok()?;
|
||
Some(pdf.pages().len())
|
||
}
|
||
|
||
/// Size of PDF page `page` (0-based), in points, as it shows (crop box, rotation applied).
|
||
pub fn pdf_page_size(bytes: &[u8], page: usize) -> Option<(f64, f64)> {
|
||
let pdf = hayro::hayro_syntax::Pdf::new(std::sync::Arc::new(bytes.to_vec())).ok()?;
|
||
let p = pdf.pages().get(page)?;
|
||
let (w, h) = p.render_dimensions();
|
||
Some((w as f64, h as f64))
|
||
}
|
||
|
||
/// PDF page `page` as PNG, its longer side about `max_side` pixels, with the `hidden` layers off.
|
||
pub fn pdf_page_png(bytes: &[u8], page: usize, max_side: u32, hidden: &[String]) -> Option<Vec<u8>> {
|
||
let data = if hidden.is_empty() { bytes.to_vec() } else { pdf_hide_layers(bytes, hidden).unwrap_or_else(|| bytes.to_vec()) };
|
||
let pm = render_pdf_page(&data, page, max_side)?;
|
||
let pixels: Vec<u8> = pm.data().iter().flat_map(|p| [p.r, p.g, p.b, p.a]).collect();
|
||
Some(Rendered { width: pm.width() as u32, height: pm.height() as u32, pixels }.to_png())
|
||
}
|
||
|
||
/// Rasterize PDF page `page` so its longer side is about `max_side` pixels (screen display; PDF
|
||
/// export embeds the page as vectors).
|
||
pub fn render_pdf_page(bytes: &[u8], page: usize, max_side: u32) -> Option<Pixmap> {
|
||
let pdf = hayro::hayro_syntax::Pdf::new(std::sync::Arc::new(bytes.to_vec())).ok()?;
|
||
let p = pdf.pages().get(page)?;
|
||
let (w, h) = p.render_dimensions();
|
||
let scale = (max_side as f32 / w.max(h).max(1.0)).min(8.0);
|
||
let rs = hayro::RenderSettings { x_scale: scale, y_scale: scale, ..Default::default() };
|
||
let pm = hayro::render(p, &hayro::RenderCache::new(), &hayro::hayro_interpret::InterpreterSettings::default(), &rs);
|
||
let (pw, ph) = (pm.width(), pm.height());
|
||
let data: Vec<vello_cpu::color::PremulRgba8> =
|
||
pm.data_as_u8_slice().chunks_exact(4).map(|c| vello_cpu::color::PremulRgba8 { r: c[0], g: c[1], b: c[2], a: c[3] }).collect();
|
||
Some(Pixmap::from_parts(data, pw, ph))
|
||
}
|
||
|
||
/// A page box of a PDF page (`crop`, `trim`, `bleed`, `art`, `media`) as (x, y, w, h) in points
|
||
/// from the top-left of the page as rendered (its visible crop box); missing boxes fall back to the
|
||
/// crop box, as PDF readers do.
|
||
pub fn pdf_page_box(bytes: &[u8], page: usize, kind: &str) -> Option<(f64, f64, f64, f64)> {
|
||
use hayro::hayro_syntax::object::{Rect as PRect, dict::keys};
|
||
let pdf = hayro::hayro_syntax::Pdf::new(std::sync::Arc::new(bytes.to_vec())).ok()?;
|
||
let p = pdf.pages().get(page)?;
|
||
let visible = p.intersected_crop_box();
|
||
let key: &[u8] = match kind {
|
||
"trim" => keys::TRIM_BOX,
|
||
"bleed" => keys::BLEED_BOX,
|
||
"art" => keys::ART_BOX,
|
||
"media" => return Some(rel(visible, p.media_box())),
|
||
_ => return Some(rel(visible, visible)),
|
||
};
|
||
let b = p.raw().get::<PRect>(key).map(|b| b.intersect(p.media_box())).unwrap_or(visible);
|
||
fn rel(v: PRect, b: PRect) -> (f64, f64, f64, f64) {
|
||
(b.x0 - v.x0, v.y1 - b.y1, b.width(), b.height())
|
||
}
|
||
Some(rel(visible, b))
|
||
}
|
||
|
||
/// Separations Preview on a rendered image: `plate` 0–3 shows that process plate (C, M, Y, K) as
|
||
/// ink density in grey; with an `ink_limit` (0–4, total ink) areas over it are shown in red.
|
||
/// Pixels are separated with a plain GCR (black = 1 − max(r, g, b)), so it's a preview.
|
||
/// View › Proof Colors: simulate the proof target (a press, another RGB space, colour-vision
|
||
/// deficiencies) through the active colour settings' proof table.
|
||
pub fn proof_view(img: &mut Rendered, setup: &designcraft_color::cms::ProofSetup) {
|
||
let lut = designcraft_color::cms::active().proof_lut(setup);
|
||
for px in img.pixels.chunks_exact_mut(4) {
|
||
let a = px[3];
|
||
if a == 0 {
|
||
continue;
|
||
}
|
||
// Premultiplied → straight, proof, back.
|
||
let k = 255.0 / a as f32;
|
||
let rgb = [px[0], px[1], px[2]].map(|v| ((v as f32 * k).round()).min(255.0) as u8);
|
||
let out = lut.apply8(rgb);
|
||
for i in 0..3 {
|
||
px[i] = ((out[i] as u32 * a as u32 + 127) / 255) as u8;
|
||
}
|
||
}
|
||
}
|
||
|
||
pub fn separation_view(img: &mut Rendered, plate: Option<u8>, ink_limit: Option<f32>) {
|
||
for px in img.pixels.chunks_exact_mut(4) {
|
||
let a = px[3] as f32 / 255.0;
|
||
// Composite over paper white, then separate.
|
||
let ch = |v: u8| (v as f32 / 255.0) + (1.0 - a);
|
||
let (r, g, b) = (ch(px[0]).min(1.0), ch(px[1]).min(1.0), ch(px[2]).min(1.0));
|
||
let k = 1.0 - r.max(g).max(b);
|
||
let inks =
|
||
if k >= 0.999 { [0.0, 0.0, 0.0, 1.0] } else { [(1.0 - r - k) / (1.0 - k), (1.0 - g - k) / (1.0 - k), (1.0 - b - k) / (1.0 - k), k] };
|
||
let mut out = match plate {
|
||
Some(p) => {
|
||
let v = ((1.0 - inks[p.min(3) as usize].clamp(0.0, 1.0)) * 255.0).round() as u8;
|
||
[v, v, v, 255]
|
||
}
|
||
None => [(r * 255.0) as u8, (g * 255.0) as u8, (b * 255.0) as u8, 255],
|
||
};
|
||
if let Some(limit) = ink_limit
|
||
&& inks.iter().sum::<f32>() > limit
|
||
{
|
||
out = [230, 40, 40, 255];
|
||
}
|
||
px.copy_from_slice(&out);
|
||
}
|
||
}
|
||
|
||
pub fn image_mime(bytes: &[u8]) -> &'static str {
|
||
designcraft_images::mime(bytes)
|
||
}
|
||
|
||
#[cfg(test)]
|
||
mod tests {
|
||
use super::*;
|
||
use designcraft_doc::build::NewDocument;
|
||
use designcraft_doc::{Fill, ParaFormat};
|
||
|
||
#[test]
|
||
fn proof_view_simulates_the_target() {
|
||
use designcraft_color::cms::{ProofSetup, ProofTarget};
|
||
let red = |a: u8| Rendered { width: 1, height: 1, pixels: vec![a, 0, 0, a] };
|
||
let mut img = red(255);
|
||
proof_view(&mut img, &ProofSetup { target: ProofTarget::Protanopia, ..Default::default() });
|
||
assert!(img.pixels[1] > 40, "protanopia turns pure red olive: {:?}", img.pixels);
|
||
let mut img = red(255);
|
||
proof_view(&mut img, &ProofSetup { target: ProofTarget::MonitorRgb, ..Default::default() });
|
||
assert!(img.pixels[0] > 245 && img.pixels[1] < 10, "monitor RGB is no simulation: {:?}", img.pixels);
|
||
// Transparent pixels stay transparent; premultiplication is kept.
|
||
let mut img = Rendered { width: 2, height: 1, pixels: vec![0, 0, 0, 0, 100, 0, 0, 128] };
|
||
proof_view(&mut img, &ProofSetup { target: ProofTarget::WorkingCmyk, ..Default::default() });
|
||
assert_eq!(&img.pixels[..4], &[0, 0, 0, 0]);
|
||
assert!(img.pixels[4] <= 128 && img.pixels[7] == 128);
|
||
}
|
||
|
||
#[test]
|
||
fn renders_page_with_text_and_fill() {
|
||
let mut d = Document::new(&NewDocument::default());
|
||
let lid = d.default_layer();
|
||
let (fid, _) =
|
||
d.add_text_frame(SpreadRef::Doc(0), Rect::new(36.0, 36.0, 576.0, 300.0), lid, "Hello DesignCraft", ParaFormat::default()).unwrap();
|
||
let id = designcraft_doc::ItemId(d.alloc());
|
||
let mut box_ =
|
||
Item::new(id, lid, designcraft_doc::Shape::Rectangle, designcraft_geom::shapes::rectangle(Rect::new(36.0, 400.0, 136.0, 500.0)));
|
||
box_.fill = Fill::swatch("C=100 M=0 Y=0 K=0");
|
||
d.insert_item(SpreadRef::Doc(0), box_, None).unwrap();
|
||
let cache = Cache::new();
|
||
let mut r = Renderer::new();
|
||
r.threads = 0;
|
||
let img = r.render_page(&d, &cache, 0, 1.0, false, &RenderOptions::default()).unwrap();
|
||
assert_eq!((img.width, img.height), (612, 792));
|
||
// Paper is white, the box is cyan-ish, text drew some dark pixels.
|
||
assert_eq!(img.pixel(300, 700), [255, 255, 255, 255]);
|
||
let c = img.pixel(80, 450);
|
||
assert!(c[0] < 80 && c[2] > 150, "{c:?}");
|
||
let dark = (36..300).flat_map(|x| (36..60).map(move |y| (x, y))).filter(|&(x, y)| img.pixel(x, y)[0] < 100).count();
|
||
assert!(dark > 50, "text pixels: {dark}");
|
||
let _ = fid;
|
||
assert!(r.stats.glyphs >= 15);
|
||
}
|
||
|
||
#[test]
|
||
fn arrowheads_draw_at_line_ends() {
|
||
let mut d = Document::new(&NewDocument::default());
|
||
let lid = d.default_layer();
|
||
let id = designcraft_doc::ItemId(d.alloc());
|
||
let path = designcraft_geom::shapes::line(designcraft_geom::Point::new(100.0, 400.0), designcraft_geom::Point::new(400.0, 400.0));
|
||
let mut line = Item::new(id, lid, designcraft_doc::Shape::GraphicLine, path);
|
||
line.stroke = designcraft_doc::Stroke {
|
||
swatch: designcraft_color::swatch::BLACK.into(),
|
||
weight: 2.0,
|
||
end: designcraft_doc::Arrowhead::TriangleWide,
|
||
..Default::default()
|
||
};
|
||
d.insert_item(SpreadRef::Doc(0), line, None).unwrap();
|
||
// A dashed line with a gap colour: the gaps are painted.
|
||
let id = designcraft_doc::ItemId(d.alloc());
|
||
let path = designcraft_geom::shapes::line(designcraft_geom::Point::new(100.0, 500.0), designcraft_geom::Point::new(400.0, 500.0));
|
||
let mut dashed = Item::new(id, lid, designcraft_doc::Shape::GraphicLine, path);
|
||
dashed.stroke = designcraft_doc::Stroke {
|
||
swatch: designcraft_color::swatch::BLACK.into(),
|
||
weight: 4.0,
|
||
kind: designcraft_doc::StrokeType::Dashed { pattern: vec![12.0, 4.0] },
|
||
gap_swatch: "C=100 M=0 Y=0 K=0".into(),
|
||
..Default::default()
|
||
};
|
||
d.insert_item(SpreadRef::Doc(0), dashed, None).unwrap();
|
||
let cache = Cache::new();
|
||
let mut r = Renderer::new();
|
||
r.threads = 0;
|
||
let img = r.render_page(&d, &cache, 0, 1.0, false, &RenderOptions::default()).unwrap();
|
||
// The head is 6.4 × weight wide: ink 4 pt above the line near the tip, none at the start.
|
||
assert!(img.pixel(393, 396)[0] < 128, "{:?}", img.pixel(393, 396));
|
||
assert_eq!(img.pixel(105, 396), [255, 255, 255, 255]);
|
||
// Nothing past the tip.
|
||
assert_eq!(img.pixel(403, 400), [255, 255, 255, 255]);
|
||
let (dash, gap) = (img.pixel(106, 500), img.pixel(114, 500));
|
||
assert!(dash[0] < 80 && dash[2] < 80, "dash {dash:?}");
|
||
assert!(gap[0] < 80 && gap[2] > 150, "gap {gap:?}");
|
||
}
|
||
|
||
#[test]
|
||
fn overprint_preview_mixes_inks() {
|
||
let mut d = Document::new(&NewDocument::default());
|
||
let lid = d.default_layer();
|
||
for (sw, op) in [("C=0 M=0 Y=100 K=0", false), ("C=0 M=100 Y=0 K=0", true)] {
|
||
let id = designcraft_doc::ItemId(d.alloc());
|
||
let mut it =
|
||
Item::new(id, lid, designcraft_doc::Shape::Rectangle, designcraft_geom::shapes::rectangle(Rect::new(100.0, 100.0, 200.0, 200.0)));
|
||
it.fill = Fill { overprint: op, ..Fill::swatch(sw) };
|
||
d.insert_item(SpreadRef::Doc(0), it, None).unwrap();
|
||
}
|
||
let cache = Cache::new();
|
||
let mut r = Renderer::new();
|
||
r.threads = 0;
|
||
let px = |on: bool, r: &mut Renderer| {
|
||
r.render_page(&d, &cache, 0, 1.0, false, &RenderOptions { overprint_preview: on, ..Default::default() }).unwrap().pixel(150, 150)
|
||
};
|
||
let off = px(false, &mut r);
|
||
let on = px(true, &mut r);
|
||
assert!(off[2] > 100, "magenta knocks out: {off:?}");
|
||
assert!(on[2] < 60 && on[0] > 180, "magenta over yellow → red: {on:?}");
|
||
}
|
||
|
||
#[test]
|
||
fn knockout_group_hides_its_own_objects() {
|
||
let mut d = Document::new(&NewDocument::default());
|
||
let lid = d.default_layer();
|
||
let mut kids = Vec::new();
|
||
for (sw, x) in [("C=0 M=0 Y=100 K=0", 100.0), ("C=0 M=100 Y=0 K=0", 150.0)] {
|
||
let id = designcraft_doc::ItemId(d.alloc());
|
||
let mut it =
|
||
Item::new(id, lid, designcraft_doc::Shape::Rectangle, designcraft_geom::shapes::rectangle(Rect::new(x, 100.0, x + 100.0, 200.0)));
|
||
it.fill = Fill::swatch(sw);
|
||
it.opacity = 0.5;
|
||
kids.push(std::sync::Arc::new(it));
|
||
}
|
||
let gid = designcraft_doc::ItemId(d.alloc());
|
||
let mut g = Item::new(gid, lid, designcraft_doc::Shape::Group, designcraft_geom::shapes::rectangle(Rect::new(100.0, 100.0, 250.0, 200.0)));
|
||
g.content = designcraft_doc::Content::Group { items: kids };
|
||
d.insert_item(SpreadRef::Doc(0), g, None).unwrap();
|
||
let cache = Cache::new();
|
||
let mut r = Renderer::new();
|
||
r.threads = 0;
|
||
let overlap = |d: &Document, r: &mut Renderer| r.render_page(d, &cache, 0, 1.0, false, &RenderOptions::default()).unwrap().pixel(175, 150);
|
||
let plain = overlap(&d, &mut r);
|
||
d.item_mut(gid).unwrap().knockout = true;
|
||
let ko = overlap(&d, &mut r);
|
||
let magenta_only = r.render_page(&d, &cache, 0, 1.0, false, &RenderOptions::default()).unwrap().pixel(225, 150);
|
||
assert_ne!(plain, ko, "{plain:?} {ko:?}");
|
||
for c in 0..3 {
|
||
assert!((ko[c] as i32 - magenta_only[c] as i32).abs() <= 3, "the overlap shows magenta alone: {ko:?} vs {magenta_only:?}");
|
||
}
|
||
}
|
||
|
||
#[test]
|
||
fn separations_split_plates_and_flag_ink_limits() {
|
||
// Pure cyan (0, 255, 255) and rich black-ish (20, 20, 20).
|
||
let mut img = Rendered { width: 2, height: 1, pixels: vec![0, 255, 255, 255, 20, 20, 20, 255] };
|
||
let mut c = img.clone();
|
||
separation_view(&mut c, Some(0), None);
|
||
assert_eq!(c.pixel(0, 0)[0], 0, "cyan plate solid under cyan");
|
||
let mut m = img.clone();
|
||
separation_view(&mut m, Some(1), None);
|
||
assert_eq!(m.pixel(0, 0)[0], 255, "no magenta");
|
||
separation_view(&mut img, None, Some(0.5));
|
||
assert_eq!(img.pixel(0, 0), [230, 40, 40, 255], "100% over a 50% limit");
|
||
}
|
||
|
||
#[test]
|
||
fn black_overprints_only_with_the_preference() {
|
||
let mut d = Document::new(&NewDocument::default());
|
||
let lid = d.default_layer();
|
||
for (sw, r) in
|
||
[("C=100 M=0 Y=0 K=0", Rect::new(100.0, 100.0, 200.0, 200.0)), (designcraft_color::swatch::BLACK, Rect::new(150.0, 100.0, 250.0, 200.0))]
|
||
{
|
||
let id = designcraft_doc::ItemId(d.alloc());
|
||
let mut it = Item::new(id, lid, designcraft_doc::Shape::Rectangle, designcraft_geom::shapes::rectangle(r));
|
||
it.fill = Fill::swatch(sw);
|
||
d.insert_item(SpreadRef::Doc(0), it, None).unwrap();
|
||
}
|
||
let cache = Cache::new();
|
||
let mut r = Renderer::new();
|
||
r.threads = 0;
|
||
let o = RenderOptions { overprint_preview: true, ..Default::default() };
|
||
let on = r.render_page(&d, &cache, 0, 1.0, false, &o).unwrap().pixel(175, 150);
|
||
let alone = r.render_page(&d, &cache, 0, 1.0, false, &o).unwrap().pixel(225, 150);
|
||
d.settings.overprint_black = false;
|
||
let off = r.render_page(&d, &cache, 0, 1.0, false, &o).unwrap().pixel(175, 150);
|
||
assert_eq!(off, alone, "knocks out: black alone");
|
||
assert_ne!(on, alone, "overprints: the cyan shows through");
|
||
}
|
||
|
||
#[test]
|
||
fn appearance_of_black_on_screen() {
|
||
let mut d = Document::new(&NewDocument::default());
|
||
let lid = d.default_layer();
|
||
let id = designcraft_doc::ItemId(d.alloc());
|
||
let mut it =
|
||
Item::new(id, lid, designcraft_doc::Shape::Rectangle, designcraft_geom::shapes::rectangle(Rect::new(100.0, 100.0, 200.0, 200.0)));
|
||
it.fill = Fill::swatch(designcraft_color::swatch::BLACK);
|
||
d.insert_item(SpreadRef::Doc(0), it, None).unwrap();
|
||
let cache = Cache::new();
|
||
let mut r = Renderer::new();
|
||
r.threads = 0;
|
||
let px = |rich: bool, r: &mut Renderer| {
|
||
r.render_page(&d, &cache, 0, 1.0, false, &RenderOptions { rich_black: rich, ..Default::default() }).unwrap().pixel(150, 150)
|
||
};
|
||
assert!(px(false, &mut r)[0] > 20, "accurate: a dark grey");
|
||
assert_eq!(px(true, &mut r)[..3], [0, 0, 0]);
|
||
}
|
||
|
||
#[test]
|
||
fn display_performance_fast_draws_grey_boxes() {
|
||
let mut d = Document::new(&NewDocument::default());
|
||
let lid = d.default_layer();
|
||
// A 4×4 red PNG placed at 100,100 (100×100 pt).
|
||
let mut png = Vec::new();
|
||
image::RgbaImage::from_pixel(4, 4, image::Rgba([255, 0, 0, 255]))
|
||
.write_to(&mut std::io::Cursor::new(&mut png), image::ImageFormat::Png)
|
||
.unwrap();
|
||
let aid = designcraft_doc::AssetId(d.alloc());
|
||
d.assets.insert(
|
||
aid,
|
||
Arc::new(designcraft_doc::Asset {
|
||
page: 0,
|
||
id: aid,
|
||
name: "red.png".into(),
|
||
mime: "image/png".into(),
|
||
link: None,
|
||
data: Arc::new(png),
|
||
pixels: Some((4, 4)),
|
||
}),
|
||
);
|
||
let id = designcraft_doc::ItemId(d.alloc());
|
||
let mut it =
|
||
Item::new(id, lid, designcraft_doc::Shape::Rectangle, designcraft_geom::shapes::rectangle(Rect::new(100.0, 100.0, 200.0, 200.0)));
|
||
it.content = designcraft_doc::Content::Graphic(designcraft_doc::Graphic {
|
||
asset: aid,
|
||
size: (100.0, 100.0),
|
||
xf: Affine::translate((100.0, 100.0)),
|
||
auto_fit: Default::default(),
|
||
fit_align: 4,
|
||
crop: [0.0; 4],
|
||
});
|
||
d.insert_item(SpreadRef::Doc(0), it, None).unwrap();
|
||
let cache = Cache::new();
|
||
let mut r = Renderer::new();
|
||
r.threads = 0;
|
||
let px = |q: DisplayQuality, r: &mut Renderer| {
|
||
r.render_page(&d, &cache, 0, 1.0, false, &RenderOptions { quality: q, ..Default::default() }).unwrap().pixel(150, 150)
|
||
};
|
||
assert_eq!(px(DisplayQuality::High, &mut r)[..3], [255, 0, 0]);
|
||
assert_eq!(px(DisplayQuality::Typical, &mut r)[..3], [255, 0, 0]);
|
||
assert_eq!(px(DisplayQuality::Fast, &mut r)[..3], [178, 178, 178]);
|
||
}
|
||
|
||
#[test]
|
||
fn missing_fonts_are_highlighted_on_screen_only() {
|
||
let mut d = Document::new(&NewDocument::default());
|
||
let lid = d.default_layer();
|
||
let (_, sid) = d.add_text_frame(SpreadRef::Doc(0), Rect::new(36.0, 36.0, 336.0, 100.0), lid, "Missing font", ParaFormat::default()).unwrap();
|
||
d.story_mut(sid).unwrap().format_chars(0..12, |f| f.over.font_family = Some("No Such Family".into()));
|
||
let cache = Cache::new();
|
||
let cs = cache.get(&d, sid, None);
|
||
assert!(cs.styles.iter().any(|s| s.missing_font));
|
||
let l = &cs.frames[0].lines[0];
|
||
// A point inside the line box but between glyph strokes: the space after "Missing".
|
||
let g = l.glyphs.iter().find(|g| g.byte == 7).unwrap();
|
||
let (x, y) = ((g.x + g.adv / 2.0) as u32, (l.baseline - l.ascent * 0.5) as u32);
|
||
let mut r = Renderer::new();
|
||
r.threads = 0;
|
||
let plain = r.render_page(&d, &cache, 0, 1.0, false, &RenderOptions::default()).unwrap();
|
||
let shown = r.render_page(&d, &cache, 0, 1.0, false, &RenderOptions { highlight_missing_fonts: true, ..Default::default() }).unwrap();
|
||
assert_eq!(plain.pixel(x, y)[1], 255, "no highlight in output");
|
||
let p = shown.pixel(x, y);
|
||
assert!(p[0] > 240 && p[1] < 200, "pink on screen: {p:?}");
|
||
}
|
||
|
||
#[test]
|
||
fn renders_tables() {
|
||
let mut d = Document::new(&NewDocument::default());
|
||
let lid = d.default_layer();
|
||
let (_, sid) = d.add_text_frame(SpreadRef::Doc(0), Rect::new(36.0, 36.0, 336.0, 400.0), lid, "", ParaFormat::default()).unwrap();
|
||
let mut t = designcraft_doc::Table::new(5, 3, 3, 1, 0, 300.0);
|
||
for c in 0..3 {
|
||
let cell = t.cell_mut(0, c).unwrap();
|
||
cell.fill = "C=100 M=0 Y=0 K=0".into();
|
||
cell.text.insert(0, "Head");
|
||
t.cell_mut(2, c).unwrap().text.insert(0, "WWWWWWWW");
|
||
}
|
||
d.story_mut(sid).unwrap().insert_table(0, t);
|
||
let cache = Cache::new();
|
||
let cs = cache.get(&d, sid, None);
|
||
let tf = &cs.frames[0].tables[0];
|
||
let head = tf.cell(0, 1).unwrap().rect;
|
||
let body = tf.cell(2, 0).unwrap().rect;
|
||
let mut r = Renderer::new();
|
||
r.threads = 0;
|
||
let img = r.render_page(&d, &cache, 0, 1.0, false, &RenderOptions::default()).unwrap();
|
||
// Header fill (cyan) near the right edge of the middle header cell.
|
||
let c = img.pixel((head.x1 - 3.0) as u32, (head.y0 + 3.0) as u32);
|
||
assert!(c[0] < 80 && c[2] > 150, "{c:?}");
|
||
// The table border (black) on the left edge.
|
||
let e = img.pixel(body.x0.round() as u32, body.center().y as u32);
|
||
assert!(e[0] < 200, "{e:?}");
|
||
// Cell text drew dark pixels inside the body cell.
|
||
let dark = ((body.x0 + 5.0) as u32..(body.x1 - 2.0) as u32)
|
||
.flat_map(|x| ((body.y0 + 2.0) as u32..(body.y1 - 2.0) as u32).map(move |y| (x, y)))
|
||
.filter(|&(x, y)| img.pixel(x, y)[0] < 100)
|
||
.count();
|
||
assert!(dark > 30, "cell text pixels: {dark}");
|
||
}
|
||
}
|