Bevy's default sprite sampler is bilinear (Linear), which mushes
pixel-art card faces at non-integer scales. The rusty-pixel theme
ships 256x384 source PNGs that get displayed at ~150-200px wide on
typical desktop windows — an aggressive downscale where bilinear
visibly blurs the pixel grid.
Globally flipping ImagePlugin to default_nearest() would also affect
the SVG-rasterised default theme, where bilinear's smoothing is
actually desired (the SVG rasteriser produces a high-res 512x768
pixmap that the GPU has to downscale at draw time).
The fix is a per-theme opt-in:
- ThemeMeta gains pixel_art: bool with #[serde(default)] for
backwards compat. Older manifests load with `false`, preserving
SVG-default behaviour.
- sync_card_image_set_with_active_theme inspects theme.meta.pixel_art
after a theme finishes loading. When true, walks every face +
back Handle<Image> in the active CardTheme and rewrites its
sampler to ImageSampler::Descriptor(ImageSamplerDescriptor::nearest()).
The Modified asset event triggers a GPU re-upload with the new
sampler descriptor.
- The 12 ThemeMeta struct literals across the engine
(settings_plugin, card_plugin, theme/{plugin,mod,manifest,
importer,registry}) all gain `pixel_art: false` to match the
new field.
The deployed rusty-pixel theme.ron at
~/.local/share/solitaire_quest/themes/rusty-pixel/ now sets
pixel_art: true, so the player's switch-to-pixel-art chip flips to
nearest sampling on the spot.
Workspace: 1171 passing tests / 0 failing. cargo clippy
--workspace --all-targets -- -D warnings clean.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
funman300
17e3112502