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.
A raster export filled its background into the page before the art, so
blend modes read it as art underneath: an Outer Glow in Screen mode, the
default, turned white on a white background and was missing from PNG and
JPEG files while the canvas showed it. Blending against nothing also
differed from the canvas for Difference and the other modes.
The background now goes under the finished art, in frames and in object
thumbnails. A blend mode reads only the art below it. A white object
under a Difference object still inverts.
Page Isolated Blending no longer changes a raster export on a bare page.
Docs: docs/mcp.md, docs/target-app-parity.md.
Covers the other places a Warp now moves placed gradients: a group's
and a nested group's own strokes and a compound path's stroke (with the
stroke-inflated bounds), the art of a symbol instance and the area of a
compound shape with a Warp, and a stroke's own Warp on the canvas. A
new test checks that Arc's no-bend threshold for gradients matches the
one the warp uses, and the no-bend test now covers all fifteen styles.
The render test's Fisheye case, which left the square's bounds as they
were, is replaced by a vertical Bulge, and each style there is checked
to move the outline's left or right edge. The Object > Expand test
checks that it measures the ramp and not an edge of the outline.
The params text and docs/mcp.md now state which bounds each gradient
follows, and that a warp moves them with a bend or a distortion.
A gradient placed with the Gradient tool stayed where it was when the
object's Warp effect changed the outline, so the warped shape no longer
matched its gradient.
Under each Warp style the placed gradients of a path now move and scale
from the path's bounds before the warp to its bounds after it, as they
do under Free Distort. This applies to an object's own Warp and to a
fill's or stroke's own (a stroke uses its stroke-inflated bounds), on
the canvas and in Object > Expand of the fill. In a group with a Warp
effect, each path's and compound path's gradient follows its own
bounds, and the own fills of the group and of the groups inside it
follow those groups' bounds. A warp with no bend and no distortion
leaves gradients exactly where they are, and gradients fitted to the
object are unchanged.
This changes how existing documents draw: a placed gradient on art with
a Warp effect now follows the warped outline instead of staying in
place.
How gradients follow the warp is VectorCraft's own rule. What the Warp
effects do to the object is described in
https://helpx.adobe.com/illustrator/using/reshaping-objects-effects.html
A gradient fitted to the object refit to the outline after the object's
Transform effect rotated, reflected or scaled it unevenly, so the
gradient kept running left to right while the shape turned under it.
Object › Transform already turns such a gradient.
A Transform effect that a refit would not reproduce now fixes the
gradient to its fit on the geometry the effect takes, and then maps it
with that effect and the effects after it, as a placed gradient. Under
moves and even scales it draws as a refit does, and an effect that
scales the object to nothing across leaves it fitted. This applies to
an object's own effects, a fill's or stroke's own effects, and a
group's: in a group, the gradients fitted to its paths, to its own
fill, to the groups inside it and to its images' and symbol instances'
own fills each fix to the fit on their own object. Object › Expand of
the fill draws the same.
This changes how existing documents draw: art with a fitted gradient
and a Transform effect that rotates, reflects or scales it unevenly
now shows the gradient turned with the art. How gradients follow the
effect is VectorCraft's own rule.
A gradient placed with the Gradient tool stayed where it was when the
object's Transform or Free Distort effect moved, turned or scaled the
outline, so the shape slid across its own gradient.
The Transform effect now maps placed gradients by its own transform,
and each of its copies takes them as many times as it takes the
transform. Under Free Distort, each path's placed gradients move and
scale from the path's bounds before the effect to its bounds after it.
This change does not alter gradients fitted to the object.
The canvas, Expand Appearance and export, Pathfinder and compound
shapes, groups, a fill's or stroke's own effects, and Object › Expand
of a gradient fill apply the same rule. In a group, the own fills and
strokes of the group, of the groups inside it and of a symbol's art
follow it too, and images and symbol instances that a group's
Transform effect moves take the placed gradients of their own fills
and strokes along. A group whose path keeps its shape because the
effect would pass the geometry budget keeps its own gradients in
place.
This changes how existing documents draw: a gradient placed on a path,
or on an image's or symbol instance's own fill, inside a group with a
Transform effect now moves with it. Before, only the gradients of type
moved (#2214).
How gradients follow each effect is VectorCraft's own rule. The
Distort & Transform help page describes what the effects do to the
object:
https://helpx.adobe.com/illustrator/desktop/manage-objects/reshape-transform-objects/distort-and-transform-effects-in-illustrator.html
A 3D effect on a group or layer builds a solid from every path,
compound path and type in it, all turned about one shared axis, as the
public docs describe for groups. Fixes#4506.
dotCooCoo