Icon Studio

Designs application icons from the house palettes: pick a Material Symbols glyph or some text, a foreground colour and a background treatment, and see every combination your choices allow side by side.

all ten background generators

Provenance

The original icon studio was lost in the data-loss incident, and unlike the Android clients there was no artefact to decompile — an egui binary was not sitting on a phone somewhere. So this is a rebuild from two things that did survive:

its inputs — the palettes, which are still live (see below);
its outputs — the icons it produced, which ship inside the five cbz* Android apps.

That second point is what keeps this honest. tests/reproduce.rs renders a background with the reconstructed code and compares it against ic_icon_background.png taken from the installed cbzauth APK. The originals turn out to be an even two-tone diagonal split of the Casabeza brand colours with a hairline boundary — roughly one blended pixel per row — and the tests assert exactly that, so a change that turns the split into a soft gradient fails rather than quietly drifting.

What is attested, and what is not

Feature	Evidence
Diagonal split background	Attested — all five shipped cbz icons use it
Material Symbols foreground	Attested — shipped icons are Symbols Rounded, outlined
Text foreground	Attested — cbznumerics ships “1234”
Casabeza + neiam palettes	Attested — recovered from the APK and live in dms
Solid, gradients, stripes, checks, dots, rays, wedge	Invented — described as “gradients, patterns and other things”, but no shipped icon uses them
Sub-banner	Invented — described, but no shipped icon has one, so the layout is a guess

The invented parts are reasonable, not recovered. Treat them as a starting point rather than as the tool you remember.

Palettes

Nothing is retyped by hand. tools/regen_palettes.py writes src/palette/generated.rs from:

neiam — the daisyUI themes in dms/assets/f/css/style.css (her, afterdark, forest, sky, clays, stones, dark, light), converted from OKLCH to sRGB with the same transform the Android clients use;
Casabeza — the exact values recovered from the cbzauth APK after the loss, carried in the script.

tools/regen_palettes.py              # refresh after dms changes
tools/regen_palettes.py --check      # non-zero if stale, for CI

The Android themes and the dms themes agree exactly on primary and accent; Android’s backgrounds are deliberately darker (L 0.18 against 0.35). Both are offered.

Fonts

Vendored in assets/:

Material Symbols Rounded, outlined and filled, from egui_material_icons (MIT), with the .codepoints table parsed at startup so the icon list and the rasteriser cannot disagree about what a name means;
B612 regular and bold, the face the cbz apps ship in res/font, used for text marks and sub-banners. Rendering text through the Symbols font lands on .notdef, which is why text needs its own face.

Running

cargo run              # the studio
cargo test             # including the comparison against shipped icons
cargo run --example reproduce_cbz   # re-render the five cbz icons
cargo run --example showcase        # every background generator

Export writes ic_icon, ic_icon_background and ic_icon_foreground across mipmap-mdpi through mipmap-xxxhdpi (108–432px), matching the layout the cbz apps use.

Design notes

Rendering is tiny-skia and ab_glyph, deliberately independent of egui: the preview, the grid and the exported PNG all go through render::render_composed, so what you see is what lands on disk, and the renderer can be tested headlessly. Grid cells are cached by content hash — the cartesian product gets large quickly, and it is capped at 240 cells for that reason.