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dotCooCoo
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Flatten Transparency composited each region over white, so a blend mode on the bare page read that white. Raster renders now draw their background under the finished art, and the flattened color no longer matched them: a Color Burn object on the bare page flattened to white and rendered in its own color. The region now composites the art alone and puts the white under it. - Tests that relied on the white under the art now draw art under the style (`every_builtin_style_paints_visibly_on_a_rectangle`) or compare only whole-pixel pans with a fresh render (`a_coarser_glow_kept_whole_draws_after_a_pan_as_made_again`). - New tests cover every blend mode on white and blue backgrounds, a thumbnail and the ink planes with a Screen glow, and `over_background` at background and pixel alpha 0, 128 and 255.
59 lines
3.1 KiB
Rust
59 lines
3.1 KiB
Rust
//! Object → Flatten Transparency: transparent art becomes opaque art that looks the same.
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//!
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//! The targets (`ids` or the selection) split into groups of overlapping objects. Groups without
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//! transparency stay as they are (their type and strokes are outlined on request). The others are
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//! cut into atomic regions: the faces of the planar arrangement of every fill, outlined stroke and
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//! clipping path in them ([`po::regions`]). The same paints cover each whole region, so its colour
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//! is exact: those paints composited as the renderer composites them ([`Composer`], blend modes by
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//! [`composite`]), with white under the finished art (or nothing with Preserve Alpha); in CMYK documents their inks
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//! composite, plane by plane ([`cmyk_planes`]), and the colour is CMYK. Each region becomes a path
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//! filled with that flat colour. Where gradients, patterns, images, opacity masks or raster
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//! effects reach there is no single colour: those regions are rendered into one image per group,
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//! clipped to them with Clip Complex Regions (else the image is a rectangle that takes in the
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//! regions it overlaps). The raster/vector balance rasterizes whole groups that split into more
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//! regions than it allows (all of them at 0). For files without transparency (PDF/X-1a, PDF/X-3)
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//! a CMYK document's images are opaque CMYK: its colours keep their inks there too.
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//!
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//! Edit → Transparency Flattener Presets: the built-in presets plus the user's, saved with the
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//! preferences ([`crate::Prefs::flattener_presets`]); a `preset` named anywhere options are taken
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//! finds both.
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//!
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//! Window → Flattener Preview: the same plan, worked out without rendering, reports what flattening
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//! the document would touch ([`FlattenReport`], `flattener.preview`).
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use std::collections::BTreeSet;
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use std::sync::Arc;
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use serde::{Deserialize, Serialize};
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use serde_json::{Value, json};
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use vectorcraft_color::blend::{cmyk_planes, composite, planes_cmyk};
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use vectorcraft_color::{BlendMode, Color, Paint};
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use vectorcraft_doc::appearance::{AppearanceItem, FillLayer};
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use vectorcraft_doc::cmyk::Inks;
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use vectorcraft_doc::{Appearance, ColorMode, Document, Effect, ImageBlob, ImageObject, Knockout, Node, NodeId, NodeKind};
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use vectorcraft_geom::{Affine, FillRule, PathData, Rect, shapes};
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use vectorcraft_pathops as po;
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use vectorcraft_render::effects;
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use super::edit::roots_of;
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use super::menucmds::{MAX_PIXELS, isolated_doc, unique_key};
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use super::pathops::{node_path, outline_strokes, outline_strokes_under, separate, shape_node};
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use super::{CommandSpec, EngineError, Result, Session, always, bad, bool_or, cmd, has_doc, str_param, targets, unique_name};
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mod analysis;
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mod apply;
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mod commands;
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mod compose;
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mod options;
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mod presets;
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mod report;
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pub(crate) use analysis::{outlined_text, see_through_images};
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#[cfg(test)]
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pub(crate) use apply::with_every_region;
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pub(crate) use apply::{expand_transparent_tile_images, flatten_document, flatten_expanded, has_transparent_tile_images};
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pub use commands::specs;
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pub use options::FlattenOptions;
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pub use presets::{FlattenerPreset, PRESET_EXTS, PRESET_FORMAT};
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pub use report::{FlattenReport, Highlight, Overprints, report};
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