object.flattenTransparency {preset?|options, ids?} splits the targets into groups of overlapping
objects. Groups with transparency become atomic regions (faces of the arrangement of every fill,
outlined stroke and clipping path) filled with the colour the renderer composites there: blend
modes, group opacity, isolated and non-isolated groups, knockout groups and knockout shapes, over
white or (Preserve Alpha) over nothing. Regions reached by gradients, patterns, images, opacity
masks or raster effects are rendered into one image per group, under the regions, clipped to
them with Clip Complex Regions. The raster/vector balance rasterizes whole groups past its region
budget (all at 0). Options and presets live in FlattenOptions; single visible paints keep their
colour and overprint; text and strokes can be outlined everywhere. One undo step.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
A CMYK document (file.new {colorMode: "cmyk"}, Document::new_with_mode)
starts with CMYK default swatches (default_swatches(model)), and RGB
colours and gradient stops applied to it are stored as CMYK (Gray stays
Gray) unless paint.setFill/setStroke get keepModel; the Color panel keeps
the model picked on its sliders. RGB documents keep colours as given.
Harmonies and Color Guide variations keep the base colour's model, Recolor
Artwork the replaced colour's, and Edit Colors blends between models take
the document's, through a shared Color::in_model / keep_model.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
While a mask is edited, the Transparency panel and its commands act on the
masked object (Release leaves editing first). Mask commands and
transparency.set take ids and work without a selection; Make Opacity Mask
with one object adds an empty mask and enters editing. Opacity is 0..100 in
every command. transparency.info reports the panel's values with null for
mixed ones, shown blank. Saves and exports never include the editing layer
(Document::without_edit_modes; mask_edit is not serialized).
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
