Placed PDFs rendered through hayro 0.7 from crates.io, whose
hayro-interpret divides integers in calculator functions without a
check, does not limit how deep functions nest and samples each mesh
triangle over its whole bounding box. A placed PDF whose calculator
function runs `1 0 idiv` or `-2147483648 -1 idiv` panicked the render.
A chain of 100,000 functions, each stitching function naming the next,
overflowed the stack and aborted the process. Mesh shadings with points
far off the page, ten thousand overlapping triangles or forty thousand
patches ran for over a minute or passed 2 GiB of memory.
[patch.crates-io] now takes hayro, hayro-interpret, hayro-syntax and
hayro-jbig2 from pdfcraft's vendor/ directory at b5467d93, with the
patches its vendor/README.md lists. The crate versions do not change.
The patched hayro-syntax sizes a page with a /UserUnit in points, and
pdf_page_box scales the page's boxes by the same unit, so with Crop to
the frame still shows the chosen box. NOTICE names the new source and
the licenses. The function and mesh tests in
crates/render/tests/placed_pdf.rs follow pdfcraft's tests in
crates/render/src/raster.rs.
LYH Studio episode 6 builds every gradient from C=0 M=100 Y=0 K=0 to
C=100 M=0 Y=0 K=0. InDesign blends a gradient's process stops as inks:
halfway is C 50 M 50, a light lilac. DesignCraft converted both ends to
RGB and blended there, so the middle came out a darker violet (117, 88,
189 instead of 135, 119, 181), and every Episode 6 gradient looked
different. A midpoint between CMYK stops also became an RGB colour, so
the PDF shading turned RGB with a conversion warning.
- color: `Color::lerp` blends CMYK with CMYK (or grey), and grey with
grey, in ink space; anything with RGB still blends in RGB.
- `Gradient::display_stops`: the expanded stops plus samples through
each span that isn't RGB at both ends, for renderers that interpolate
in RGB; the screen renderer uses it.
- pdf: a midpoint's expanded stop now keeps the stops' space; the
colour-space test expects no conversion for CMYK or grey midpoints.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
The renderer painted the paper, then blended page items with it: black
text in Color Dodge over blank paper dodged the white to white and
vanished, and other modes showed the same way. In InDesign (and in PDF,
where the page group starts transparent) the paper is not a backdrop:
over blank paper an object in any blend mode shows as it is, and only
the objects below it are blended with. On spreads that use a blend mode
the items are now drawn in their own group, laid over the paper once;
other spreads render as before.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Brandon Thomas