Merge pull request #7130 from dotCooCoo/fix/eps-image-samples-once

EPS: an image drawn more than once writes its samples once

docs/target-app-parity.md

@@ -610,6 +610,7 @@ since 2026-10-01.
 - **Placed gradients follow the Warp effects:** under each of the fifteen Warp styles with a bend or a distortion, a gradient placed with the Gradient tool moves and scales from the object's bounds before the warp to its bounds after it, as under Free Distort; a stroke's gradient uses those bounds inflated by the stroke. This holds for an object's own Warp and for a fill's or stroke's own, on the canvas and in Object › Expand of the fill. In a group with a Warp effect, each path's and compound path's gradients follow its own bounds, a nested group's own fills and strokes follow the nested group's bounds, and the group's own fills and strokes follow the group's bounds. In the art Pathfinder and compound shapes take, a symbol instance's Warp moves the gradients of its symbol's art by the art's bounds, and a compound shape's Warp moves its gradients by the bounds of its area. A gradient fitted to the object still fits the warped outline, and a warp with no bend and no distortion leaves the gradient exactly in place. Existing documents with a Warp effect on art with a placed gradient draw differently: before, the gradient stayed where it was while the outline changed. How gradients follow the warp is VectorCraft's own rule; what the Warp effects do to the object is described in [Reshaping with effects](https://helpx.adobe.com/illustrator/using/reshaping-objects-effects.html) (effects `tests::warp_bends_when_the_warp_moves_the_outline`, `bake::tests::baked_warps_move_placed_gradients_from_the_bounds_to_the_warped_bounds`, `bake::tests::a_warp_with_no_bend_leaves_a_placed_gradient_exactly_in_place`, `bake::tests::a_fills_and_a_strokes_own_warp_move_its_placed_gradient_with_the_bounds`, `group::tests::a_groups_warp_moves_the_gradients_placed_on_its_paths_by_each_paths_bounds`, `group::tests::a_groups_warp_moves_its_own_a_nested_groups_and_a_compound_paths_gradients_by_their_bounds`, `group::tests::shape_art_moves_the_gradients_of_a_symbol_instances_art_and_a_compound_shape_with_a_warp`; render `objectfx::a_paths_gradient_moves_and_scales_with_its_warped_bounds`; engine `objexpand::a_placed_gradient_moved_by_a_warp_expands_as_the_canvas_draws_it`). Scores and hours unchanged.
 - **Warp as a Bézier patch per style:** each of the fifteen Warp styles bends the object's bounds as one Bézier patch whose control points the style sets from the bend and the size of the bounds; the horizontal distortion then scales each column of control points about its middle and the vertical distortion scales each row. The Warp effects and warp envelopes share the map, and content with no width or no height takes the middle of the patch along that side. New warps, the built-in graphic styles' Warps and warps opened from `.ai` files carry `version` 1 for it. Warps in `.vectorcraft` documents saved before it read as `version` 0 and keep their earlier look, and edits keep a warp's version; a `version` 0 warp saved to `.ai` opens again with `version` 1, since the file holds only its settings. The patches are VectorCraft's own rules; the styles and ranges are those of the Warp options in [Distort and transform effects](https://helpx.adobe.com/illustrator/desktop/manage-objects/reshape-transform-objects/distort-and-transform-effects-in-illustrator.html) (doc `live::tests::warp_nets_bend_each_style_as_its_own_patch`, `warp_net_arc_edges_are_concentric_circles`, `warp_net_distortion_scales_the_columns_then_the_rows`, `warp_net_takes_any_numbers`, `warp_net_bends_a_huge_box_without_overflowing`, `warp_envelopes_bend_flat_content_as_the_middle_of_the_patch`, `warp_envelopes_write_their_map_version_only_when_it_has_one`, `style_libs::tests::builtin_warp_styles_take_the_nets_map`; effects `tests::a_warp_draws_with_the_map_its_version_names`, `tests::a_warp_bends_a_flat_box_as_the_middle_of_its_patch`, `tests::new_warps_take_the_nets_version`; engine `effectedit::warps_keep_the_map_their_version_names`, `envelope::new_warp_envelopes_take_the_net_and_saved_ones_keep_their_map`; eps `ai_editing::tests::every_effect_a_graphic_style_holds_is_read_back`, `import::ai::tests::a_warp_envelope_opens_live`, `import::ai::tests::warp_envelopes_read_every_style`, `import::ai::style::tests::a_stack_of_fills_with_effects_of_their_own_is_read_as_itself`; ui-egui `dialogs::tests_warp::warp_options_edit_keeps_each_targets_map_version`). Scores and hours unchanged.
 - **Warp effects bend images:** a Warp effect on an image, or on a group that holds one, bends the image's pixels with its frame, as the Warp effect is documented to distort bitmap images in [Reshaping with effects](https://helpx.adobe.com/illustrator/using/reshaping-objects-effects.html): after the last effect, the image is cut into 10 × 10 cells of two triangles, each a clipped piece under its own affine map. Effects after the Warp reshape only the frame, a second Warp bends the same pieces, and warps saved without a version bend the pixels with their earlier map, as they bend the frame. A placed gradient on a group that holds the image follows the group's bounds as the pieces draw them. SVG writes the image once for the pieces; PDF, EPS, `.ai` and PNG write the bent pieces. The images stay unbent when their pieces would make the art pass 2 million objects, and so does an image whose frame keeps its shape past the anchor budget. A grayscale image's fill color now colorizes the pieces of a warp or an envelope, and an image under any geometry effect keeps that color and its smoothing setting. Existing documents with a Warp effect on an image, or on a group that holds one, draw differently: before, the image showed unbent, cut by the bent frame. So do existing documents with a colorized image under an envelope or a geometry effect, or an image drawn without smoothing under a geometry effect: before, those lost the color or the setting. The cell count and the limits are VectorCraft's own (effects `tests::warped_images_stay_within_the_object_budget`, `tests::warped_images_keep_document_keys_and_hidden_images_apart`, `tests::an_image_whose_frame_passes_the_budget_stays_whole`, `tests::effects_after_a_warp_reshape_an_images_frame_and_not_its_pieces`, `tests::an_images_pixels_take_the_map_their_warps_version_names`, `tests::an_image_under_a_geometry_effect_keeps_its_color_and_smoothing`, `tests::a_nested_groups_gradient_follows_its_warped_image`; engine `warp_images::an_images_pixels_bend_with_effect_warp`, `a_warped_image_keeps_its_bend_in_svg`, `a_warped_image_keeps_its_bend_in_pdf`, `a_warped_image_keeps_its_bend_in_ai`, `a_warped_image_keeps_its_bend_in_eps`, `a_warped_image_keeps_its_bend_in_png`, `svg_writes_an_image_clipped_twice_in_a_users_group_twice`, `expand_appearance_of_a_warped_image_draws_as_the_canvas_did`, `a_colorized_image_keeps_its_color_when_warped`, `a_warp_on_a_group_bends_the_image_in_it`, `envelope_distort::a_colorized_image_keeps_its_color_in_an_envelope`). Scores and hours unchanged.
+- **EPS writes a repeated image's samples once:** an image drawn more than once in an EPS file (the pieces of an envelope or a Warp effect, copies of one image, or one image in a symbol's instances) has its compressed samples written once in the setup, and each placement reads them from there: a reusable stream rewound for each placement at Language Level 3 ([PostScript Language Reference, 3rd ed., §3.13](https://www.adobe.com/jp/print/postscript/pdfs/PLRM.pdf)), and an array of strings of at most 49,152 bytes fed to the image by a procedure at Level 2. An image drawn once is written where it is drawn, as before. The 256 MB limit on the page counts the samples once, so an envelope of a large photo no longer loses pieces to it. A colorized image is reused per ink (eps `tests::an_image_placed_twice_writes_its_samples_once_at_both_levels`, `tests::an_envelopes_image_pieces_draw_one_copy_of_its_samples`, `tests::each_ink_of_a_colorized_image_placed_twice_is_written_once`, `tests::samples_longer_than_a_string_are_reused_at_both_levels`, `tests::the_page_limit_counts_a_repeated_images_samples_once`). Scores and hours unchanged.
 - **Distort Appearance with Transform effect options:** with Envelope Options › Distort Appearance on, a path whose Transform effect has Scale Strokes & Effects or Transform Patterns on, or copies it with a gradient, is bent as the same per-copy art it draws and expands as outside the envelope: each copy's own stroke weight, dashes, pattern placement and gradient (effects `bake::tests`). Scores and hours unchanged.
 - **Fitted gradients turn with the Transform effect:** a gradient fitted to the object (not placed with the Gradient tool) turns, reflects and stretches with the object when its Transform effect rotates, reflects or scales it unevenly, as Object › Transform already does: the gradient is fixed to its fit on the geometry the effect takes, then follows the effect and the effects after it as a placed gradient does. Under moves and even scales it draws as a refit does, and a Transform effect that scales the object to nothing across leaves it fitted, with Scale Strokes & Effects or Transform Patterns on too, and on each copy. This holds on the canvas and in Object › Expand of the fill, for an object's own effects, a fill's or stroke's own, and a group's, where 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 their own object's fit. Existing documents with such a Transform effect on fitted-gradient art draw differently: before, the gradient refit to the turned outline. The Gradient tool still shows a fitted gradient's vector at its unturned fit. How gradients follow the effect is VectorCraft's own rule; what the effect does to the object is described in [Distort and transform effects](https://helpx.adobe.com/illustrator/desktop/manage-objects/reshape-transform-objects/distort-and-transform-effects-in-illustrator.html) (effects `bake::tests::a_fitted_gradient_turns_reflects_and_stretches_with_a_transform_effect`, `bake::tests::a_transform_effect_that_scales_to_nothing_leaves_a_fitted_gradient_fitted`, `group::tests::a_groups_transform_turns_the_gradients_fitted_to_its_members_and_its_own_fill`; render `objectfx::a_fitted_gradient_turns_and_reflects_with_its_transform_on_the_canvas`; engine `objexpand::a_fitted_gradient_turned_by_a_transform_expands_as_the_canvas_draws_it`). Scores and hours unchanged.
 - **Placed gradients follow Transform and Free Distort effects:** a gradient placed with the Gradient tool moves, turns and scales with the object when the object's Transform effect moves its outline, and each copy of the Transform effect takes it as many times as it takes the transform. Under Free Distort it moves and scales from the path's bounds before the effect to its bounds after it. This holds on the canvas, in export, in Expand Appearance, in Pathfinder and compound shapes, and in Object › Expand of the fill, for an object's own effects, a group's (the own fills of the group, of the groups inside it, of a symbol's art, and of the images and symbol instances it moves, included) and a fill's or stroke's own. A gradient on a path inside a group with a Transform effect now moves with the path (#2214 moved only the gradients of type), and so does a gradient on an image's or symbol instance's own fill. When a path keeps its shape because the effect would pass the geometry budget, the group's own gradients stay in place; a hidden path in a layer, which the layer's bounds leave out, does not hold them. A freeform gradient whose points were edited moves its points in the same way. How gradients follow each effect is VectorCraft's own rule; what each effect does to the object is described in [Distort and transform effects](https://helpx.adobe.com/illustrator/desktop/manage-objects/reshape-transform-objects/distort-and-transform-effects-in-illustrator.html) (effects `bake::tests::a_baked_transform_moves_a_placed_gradient_with_the_path`, `bake::tests::a_strokes_own_transform_and_free_distort_move_its_placed_gradient`, `bake::tests::a_fills_gradient_follows_the_effects_around_its_transform_with_options`, `bake::tests::baked_free_distort_moves_placed_gradients_from_the_bounds_to_the_distorted_bounds`, `group::tests::a_groups_transform_and_free_distort_move_the_gradients_placed_on_its_paths`, `group::tests::a_groups_transform_moves_the_gradient_of_its_own_fill`, `group::tests::a_nested_groups_own_gradient_follows_the_outer_groups_transform_and_free_distort`, `group::tests::a_groups_transform_moves_the_gradients_placed_on_an_images_own_fills`, `group::tests::shape_art_moves_gradients_with_a_transform_effect`, `group::tests::shape_art_moves_the_gradient_of_a_symbol_instances_art_with_its_transform`, `tests::art_past_the_budget_keeps_its_own_gradients_in_place`, `tests::a_hidden_path_past_the_budget_leaves_a_layers_gradients_free_to_move`, `tests::edited_freeform_points_follow_a_transform_effect_and_free_distort`; render `objectfx::a_paths_gradient_moves_with_its_transform_and_free_distort`; engine `objexpand::a_placed_gradient_moved_by_a_transform_or_free_distort_expands_as_the_canvas_draws_it`). Scores and hours unchanged.- **Constrain Angle (#394):** General › Constrain Angle turns the arrow keys' axes (guides stay on the page's), holds Shift drags of the Selection, Direct Selection, Free Transform, Slice Selection, Reshape and Measure tools and the Pen's handles to the turned axes, and new rectangles, rounded rectangles, ellipses, grids, point and area type, Shift-drawn polygons and stars and the shape size dialogs are drawn along it with their bounding box turned; 0° and whole turns are exactly as before, quarter turns exact (<https://helpx.adobe.com/illustrator/desktop/manage-objects/arrange-objects/rotate-objects-by-specific-angles.html>). Tests: `tests_constrain_tools`, `tests_constrain_new` (engine), `geom` `constrain_axes` / `rotate_deg`, the shape, grid and type tool tests.