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feat: ✨ lazily-loaded Gerber viewer demo in the blog, served from R2

Browse source 
Embed KiCad's gerbview WASM in the graphics-to-WebGL blog post as a
click-to-load demo that opens the tiny_tapeout board entirely in-browser.

- GerberDemo.astro: lazy iframe embed + cross-origin-isolation reload guard
  + WebGL2/SharedArrayBuffer feature-detect with a poster fallback
- public/gerber-demo/{index.html,boot.js}: self-contained gerbview boot
  harness (config seed, MEMFS board preload, argv auto-open)
- board/ tiny_tapeout layers + poster.png committed; wasm/ glue JS committed
  (served same-origin — pthread worker can't be cross-origin), while
  gerbview.wasm + kicad-resources.bin are git-ignored and served from
  Cloudflare R2 (assets.pcbjam.com)
- COOP/COEP require-corp scoped to the post + /gerber-demo routes
  (dev: astro.config.mjs + middleware.ts; prod: vercel.json)
- post converted to MDX (@astrojs/mdx) so it can embed the component
- scripts/: sync-demo-wasm.sh, r2-deploy.sh, r2-cors.json

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
This commit is contained in:
Viktor Vaczi 2026-06-17 10:28:06 +02:00
commit 57f1f53d26
36 changed files with 242845 additions and 9 deletions
Download patch file Download diff file Expand all files Collapse all files

7
site/.gitignore vendored
View file

@ -2,6 +2,13 @@
dist/
.vercel/
# Gerber-viewer demo WASM (synced from /output by scripts/sync-demo-wasm.sh).
# The big binaries are served from Cloudflare R2 in production — never commit /
# ship them to Vercel. The small glue JS (wx.js, wx-dom.js, gerbview.js) MUST be
# committed: it's served same-origin (the pthread worker can't be cross-origin).
public/gerber-demo/wasm/gerbview.wasm
public/gerber-demo/wasm/kicad-resources.bin
# generated content collection types & cache
.astro/

17
site/astro.config.mjs
View file

@ -1,6 +1,7 @@
// @ts-check
import { defineConfig, envField } from 'astro/config';
import vercel from '@astrojs/vercel';
import mdx from '@astrojs/mdx';
// Static by default (every page prerenders to HTML, zero client JS).
// The Vercel adapter is wired in so any single route can opt into
@ -9,8 +10,24 @@ import vercel from '@astrojs/vercel';
export default defineConfig({
output: 'static',
adapter: vercel(),
// MDX lets the Gerber-viewer blog post embed the <GerberDemo /> component
// inline (markdown posts can't import components).
integrations: [mdx()],
// Prefetch linked pages so SPA-style navigation feels instant.
prefetch: { prefetchAll: true, defaultStrategy: 'viewport' },
// Dev-server cross-origin isolation so the embedded Gerber viewer's WASM
// threads (SharedArrayBuffer) work under `npm run dev`. Production headers are
// scoped per-route in vercel.json. require-corp (not credentialless) for the
// widest browser support incl. Safari 15.2+; safe because the site loads only
// same-origin subresources.
vite: {
server: {
headers: {
'Cross-Origin-Opener-Policy': 'same-origin',
'Cross-Origin-Embedder-Policy': 'require-corp',
},
},
},
// Typed, validated server secrets for the waitlist endpoint. All optional so
// the build never requires them and the endpoint degrades gracefully when a
// key is absent (see src/pages/api/waitlist.ts). The @astrojs/vercel adapter

766
site/package-lock.json generated
View file

@ -8,6 +8,7 @@
"name": "site",
"version": "0.0.1",
"dependencies": {
"@astrojs/mdx": "^6.0.3",
"@astrojs/vercel": "^10.0.8",
"@fontsource/oswald": "^5.2.8",
"@vercel/analytics": "^2.0.1",
@ -182,6 +183,40 @@
"vfile": "^6.0.3"
}
},
"node_modules/@astrojs/mdx": {
"version": "6.0.3",
"resolved": "https://registry.npmjs.org/@astrojs/mdx/-/mdx-6.0.3.tgz",
"integrity": "sha512-+4P3ZvwsRAqAbBgY+uZMewFo3ficlIBPZfu/Luk+v4ia/ZOuFhpsw7r+7672uT2Fc1UPdp7yW0eU5egvSq0wbw==",
"license": "MIT",
"dependencies": {
"@astrojs/internal-helpers": "0.10.0",
"@astrojs/markdown-remark": "7.2.0",
"@mdx-js/mdx": "^3.1.1",
"acorn": "^8.16.0",
"es-module-lexer": "^2.0.0",
"estree-util-visit": "^2.0.0",
"hast-util-to-html": "^9.0.5",
"piccolore": "^0.1.3",
"rehype-raw": "^7.0.0",
"remark-gfm": "^4.0.1",
"remark-smartypants": "^3.0.2",
"source-map": "^0.7.6",
"unist-util-visit": "^5.1.0",
"vfile": "^6.0.3"
},
"engines": {
"node": ">=22.12.0"
},
"peerDependencies": {
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"astro": "^6.4.0"
},
"peerDependenciesMeta": {
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"optional": true
}
}
},
"node_modules/@astrojs/prism": {
"version": "4.0.2",
"resolved": "https://registry.npmjs.org/@astrojs/prism/-/prism-4.0.2.tgz",
@ -1407,6 +1442,52 @@
"node": ">=18"
}
},
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"remark-mdx": "^3.0.0",
"remark-parse": "^11.0.0",
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"source-map": "^0.7.0",
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"vfile": "^6.0.0"
},
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},
"node_modules/@mdx-js/mdx/node_modules/estree-walker": {
"version": "3.0.3",
"resolved": "https://registry.npmjs.org/estree-walker/-/estree-walker-3.0.3.tgz",
"integrity": "sha512-7RUKfXgSMMkzt6ZuXmqapOurLGPPfgj6l9uRZ7lRGolvk0y2yocc35LdcxKC5PQZdn2DMqioAQ2NoWcrTKmm6g==",
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}
},
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"version": "1.1.0",
"resolved": "https://registry.npmjs.org/@oslojs/encoding/-/encoding-1.1.0.tgz",
@ -2152,6 +2233,15 @@
"integrity": "sha512-GhdPgy1el4/ImP05X05Uw4cw2/M93BCUmnEvWZNStlCzEKME4Fkk+YpoA5OiHNQmoS7Cafb8Xa3Pya8m1Qrzeg==",
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"license": "MIT",
"dependencies": {
"@types/estree": "*"
}
},
"node_modules/@types/hast": {
"version": "3.0.4",
"resolved": "https://registry.npmjs.org/@types/hast/-/hast-3.0.4.tgz",
@ -2170,6 +2260,12 @@
"@types/unist": "*"
}
},
"node_modules/@types/mdx": {
"version": "2.0.14",
"resolved": "https://registry.npmjs.org/@types/mdx/-/mdx-2.0.14.tgz",
"integrity": "sha512-T48PeuJtvLosNTPVhfnIp3i/n3a4g4Bad7YCq5k64D4u7NwDrAotikQ+5+sjtUvBmxCMlbo3dVL+C2dP0rWHzg==",
"license": "MIT"
},
"node_modules/@types/ms": {
"version": "2.1.0",
"resolved": "https://registry.npmjs.org/@types/ms/-/ms-2.1.0.tgz",
@ -2468,6 +2564,15 @@
"acorn": "^8"
}
},
"node_modules/acorn-jsx": {
"version": "5.3.2",
"resolved": "https://registry.npmjs.org/acorn-jsx/-/acorn-jsx-5.3.2.tgz",
"integrity": "sha512-rq9s+JNhf0IChjtDXxllJ7g41oZk5SlXtp0LHwyA5cejwn7vKmKp4pPri6YEePv2PU65sAsegbXtIinmDFDXgQ==",
"license": "MIT",
"peerDependencies": {
"acorn": "^6.0.0 || ^7.0.0 || ^8.0.0"
}
},
"node_modules/agent-base": {
"version": "7.1.4",
"resolved": "https://registry.npmjs.org/agent-base/-/agent-base-7.1.4.tgz",
@ -2570,6 +2675,15 @@
"url": "https://github.com/sponsors/wooorm"
}
},
"node_modules/astring": {
"version": "1.9.0",
"resolved": "https://registry.npmjs.org/astring/-/astring-1.9.0.tgz",
"integrity": "sha512-LElXdjswlqjWrPpJFg1Fx4wpkOCxj1TDHlSV4PlaRxHGWko024xICaa97ZkMfs6DRKlCguiAI+rbXv5GWwXIkg==",
"license": "MIT",
"bin": {
"astring": "bin/astring"
}
},
"node_modules/astro": {
"version": "6.4.4",
"resolved": "https://registry.npmjs.org/astro/-/astro-6.4.4.tgz",
@ -2758,6 +2872,16 @@
"url": "https://github.com/sponsors/wooorm"
}
},
"node_modules/character-reference-invalid": {
"version": "2.0.1",
"resolved": "https://registry.npmjs.org/character-reference-invalid/-/character-reference-invalid-2.0.1.tgz",
"integrity": "sha512-iBZ4F4wRbyORVsu0jPV7gXkOsGYjGHPmAyv+HiHG8gi5PtC9KI2j1+v8/tlibRvjoWX027ypmG/n0HtO5t7unw==",
"license": "MIT",
"funding": {
"type": "github",
"url": "https://github.com/sponsors/wooorm"
}
},
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"version": "5.0.0",
"resolved": "https://registry.npmjs.org/chokidar/-/chokidar-5.0.0.tgz",
@ -2821,6 +2945,16 @@
"node": ">=6"
}
},
"node_modules/collapse-white-space": {
"version": "2.1.0",
"resolved": "https://registry.npmjs.org/collapse-white-space/-/collapse-white-space-2.1.0.tgz",
"integrity": "sha512-loKTxY1zCOuG4j9f6EPnuyyYkf58RnhhWTvRoZEokgB+WbdXehfjFviyOVYkqzEWz1Q5kRiZdBYS5SwxbQYwzw==",
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"funding": {
"type": "github",
"url": "https://github.com/sponsors/wooorm"
}
},
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"resolved": "https://registry.npmjs.org/color-convert/-/color-convert-2.0.1.tgz",
@ -3214,6 +3348,38 @@
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@ -3277,6 +3443,97 @@
"url": "https://github.com/sponsors/sindresorhus"
}
},
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@ -3750,6 +4062,12 @@
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@ -3759,6 +4077,40 @@
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@ -14,6 +14,7 @@
"astro": "astro"
},
"dependencies": {
"@astrojs/mdx": "^6.0.3",
"@astrojs/vercel": "^10.0.8",
"@fontsource/oswald": "^5.2.8",
"@vercel/analytics": "^2.0.1",

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# Gerber viewer blog demo
KiCad's `gerbview` compiled to WebAssembly, embedded (lazily) in the blog post.
Click → it streams the WASM and renders the bundled tiny_tapeout board in-browser.
## Files here (`site/public/gerber-demo/`)
| Path | What it does |
|------|--------------|
| `index.html` | The iframe target — minimal page with the `#main-window` / `#window-container` the WASM needs. |
| `boot.js` | Boot harness: configures Emscripten `Module`, seeds KiCad config, preloads the board into MEMFS, auto-opens it via `Module.arguments`, and injects `wx.js → wx-dom.js → gerbview.js`. Holds `R2_BASE` + the dev/prod asset-base switch. |
| `board/` | The tiny_tapeout Gerber layers (committed) the demo opens. |
| `poster.png` | Static fallback shown to browsers that can't run the live viewer. |
| `wasm/` | `wx.js`/`wx-dom.js`/`gerbview.js` (committed, served same-origin) + `gerbview.wasm`/`kicad-resources.bin` (git-ignored; served from R2 in prod, local in dev). Synced from `/output`. |
## Related pieces (elsewhere in `site/`)
| Path | What it does |
|------|--------------|
| `src/components/GerberDemo.astro` | The embed: lazy click-to-load iframe, cross-origin-isolation reload guard, feature-detect + poster fallback. |
| `src/content/blog/porting-kicad-graphics-to-webgl-with-claude.mdx` | The post that renders `<GerberDemo />`. |
| `astro.config.mjs` + `src/middleware.ts` | Dev cross-origin-isolation headers (COOP/COEP `require-corp`). |
| `vercel.json` | Prod COOP/COEP, scoped to the post + `/gerber-demo/` routes. |
| `scripts/sync-demo-wasm.sh` | Copy fresh WASM from `/output` into `wasm/` (run after a gerbview rebuild). |
| `scripts/r2-deploy.sh` + `scripts/r2-cors.json` | Upload the heavy binaries to Cloudflare R2 (`pcbjam-assets` → `assets.pcbjam.com`) and set CORS. |
## Run / update
```bash
# local dev (serves wasm/ from the local mirror)
scripts/sync-demo-wasm.sh && npm run dev # /blog/porting-kicad-graphics-to-webgl-with-claude
# after a new gerbview build: refresh local mirror, then push binaries to R2
scripts/sync-demo-wasm.sh && scripts/r2-deploy.sh
```
The live viewer needs SharedArrayBuffer + WebGL2 (Chrome/Edge/Firefox, Safari 15.2+);
other browsers get `poster.png`.

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G04 APERTURE END LIST*
D10*
G04 #@! TO.C,C21*
X94775000Y74500000D03*
X93225000Y74500000D03*
G04 #@! TD*
D11*
G04 #@! TO.C,R15*
X99500000Y70790000D03*
X99500000Y71810000D03*
G04 #@! TD*
D12*
G04 #@! TO.C,C32*
X28200000Y27700000D03*
X28200000Y26150000D03*
G04 #@! TD*
D13*
G04 #@! TO.C,C23*
X68195000Y72000000D03*
X69155000Y72000000D03*
G04 #@! TD*
G04 #@! TO.C,C36*
X26920000Y14250000D03*
X27880000Y14250000D03*
G04 #@! TD*
D14*
G04 #@! TO.C,R20*
X26900000Y71710000D03*
X26900000Y70690000D03*
G04 #@! TD*
D15*
G04 #@! TO.C,R38*
X24360000Y31050000D03*
X23340000Y31050000D03*
G04 #@! TD*
D16*
G04 #@! TO.C,J15*
X31450000Y73550000D03*
X30650000Y73550000D03*
D17*
X29500000Y73550000D03*
X28500000Y73550000D03*
X28000000Y73550000D03*
X27000000Y73550000D03*
D16*
X25050000Y73550000D03*
X25850000Y73550000D03*
D17*
X26500000Y73550000D03*
X27500000Y73550000D03*
X29000000Y73550000D03*
X30000000Y73550000D03*
G04 #@! TD*
D18*
G04 #@! TO.C,C6*
X16190000Y67290000D03*
X14290000Y67290000D03*
G04 #@! TD*
D19*
G04 #@! TO.C,R5*
X14390000Y52271429D03*
X15410000Y52271429D03*
G04 #@! TD*
D20*
G04 #@! TO.C,C56*
X8700000Y23880000D03*
X8700000Y22920000D03*
G04 #@! TD*
D18*
G04 #@! TO.C,C7*
X20800000Y79700000D03*
X18900000Y79700000D03*
G04 #@! TD*
D21*
G04 #@! TO.C,R7*
X42325000Y14750000D03*
X40675000Y14750000D03*
G04 #@! TD*
D19*
G04 #@! TO.C,R1*
X14390000Y42100000D03*
X15410000Y42100000D03*
G04 #@! TD*
D22*
G04 #@! TO.C,C29*
X22400000Y10870000D03*
X22400000Y11830000D03*
G04 #@! TD*
D13*
G04 #@! TO.C,C24*
X68195000Y29000000D03*
X69155000Y29000000D03*
G04 #@! TD*
G04 #@! TO.C,C8*
X47595000Y11100000D03*
X48555000Y11100000D03*
G04 #@! TD*
D23*
G04 #@! TO.C,Y1*
X23900000Y10900000D03*
X26100000Y10900000D03*
X26100000Y12600000D03*
X23900000Y12600000D03*
G04 #@! TD*
D11*
G04 #@! TO.C,R18*
X90400000Y70790000D03*
X90400000Y71810000D03*
G04 #@! TD*
D20*
G04 #@! TO.C,C58*
X8500000Y69880000D03*
X8500000Y68920000D03*
G04 #@! TD*
D13*
G04 #@! TO.C,C27*
X11120000Y25400000D03*
X12080000Y25400000D03*
G04 #@! TD*
D19*
G04 #@! TO.C,R11*
X14390000Y59900000D03*
X15410000Y59900000D03*
G04 #@! TD*
D24*
G04 #@! TO.C,C16*
X65400000Y13260000D03*
X66950000Y13260000D03*
G04 #@! TD*
D15*
G04 #@! TO.C,R43*
X93810000Y59500000D03*
X92790000Y59500000D03*
G04 #@! TD*
D22*
G04 #@! TO.C,C4*
X17020000Y6165000D03*
X17020000Y7125000D03*
G04 #@! TD*
D15*
G04 #@! TO.C,R24*
X95765000Y26808572D03*
X94745000Y26808572D03*
G04 #@! TD*
G04 #@! TO.C,R22*
X95765000Y31820000D03*
X94745000Y31820000D03*
G04 #@! TD*
D19*
G04 #@! TO.C,R3*
X14390000Y47185715D03*
X15410000Y47185715D03*
G04 #@! TD*
D13*
G04 #@! TO.C,C2*
X63020000Y14900000D03*
X63980000Y14900000D03*
G04 #@! TD*
D25*
G04 #@! TO.C,C18*
X69155000Y26500000D03*
X68195000Y26500000D03*
G04 #@! TD*
D14*
G04 #@! TO.C,R41*
X39250000Y14547500D03*
X39250000Y13527500D03*
G04 #@! TD*
D26*
G04 #@! TO.C,C42*
X87100000Y70425000D03*
X87100000Y71975000D03*
G04 #@! TD*
D27*
G04 #@! TO.C,SW2*
X67250000Y10000000D03*
X60750000Y10000000D03*
G04 #@! TD*
D11*
G04 #@! TO.C,R8*
X61100000Y12890000D03*
X61100000Y13910000D03*
G04 #@! TD*
D25*
G04 #@! TO.C,C28*
X87680000Y65800000D03*
X86720000Y65800000D03*
G04 #@! TD*
D13*
G04 #@! TO.C,C35*
X32120000Y19200000D03*
X33080000Y19200000D03*
G04 #@! TD*
D28*
G04 #@! TO.C,J7*
X63190000Y21245000D03*
X60650000Y24555000D03*
G04 #@! TD*
D19*
G04 #@! TO.C,R12*
X40990000Y13250000D03*
X42010000Y13250000D03*
G04 #@! TD*
D10*
G04 #@! TO.C,C25*
X94775000Y76040000D03*
X93225000Y76040000D03*
G04 #@! TD*
D12*
G04 #@! TO.C,C5*
X18400000Y7675000D03*
X18400000Y6125000D03*
G04 #@! TD*
D19*
G04 #@! TO.C,R13*
X61090000Y14900000D03*
X62110000Y14900000D03*
G04 #@! TD*
D14*
G04 #@! TO.C,R21*
X30200000Y70910000D03*
X30200000Y69890000D03*
G04 #@! TD*
D19*
G04 #@! TO.C,R42*
X86790000Y73200000D03*
X87810000Y73200000D03*
G04 #@! TD*
G04 #@! TO.C,R2*
X14390000Y44642858D03*
X15410000Y44642858D03*
G04 #@! TD*
D29*
G04 #@! TO.C,SW4*
X17600000Y59890000D03*
X17600000Y57350000D03*
X17600000Y54810000D03*
X17600000Y52270000D03*
X17600000Y49730000D03*
X17600000Y47190000D03*
X17600000Y44650000D03*
X17600000Y42110000D03*
X26400000Y42110000D03*
X26400000Y44650000D03*
X26400000Y47190000D03*
X26400000Y49730000D03*
X26400000Y52270000D03*
X26400000Y54810000D03*
X26400000Y57350000D03*
X26400000Y59890000D03*
G04 #@! TD*
D14*
G04 #@! TO.C,R19*
X95250000Y64010000D03*
X95250000Y62990000D03*
G04 #@! TD*
D30*
G04 #@! TO.C,U7*
X93905000Y57600000D03*
X92635000Y57600000D03*
X91365000Y57600000D03*
X90095000Y57600000D03*
X90095000Y50400000D03*
X91365000Y50400000D03*
X92635000Y50400000D03*
X93905000Y50400000D03*
G04 #@! TD*
D20*
G04 #@! TO.C,C30*
X27700000Y12630000D03*
X27700000Y11670000D03*
G04 #@! TD*
D15*
G04 #@! TO.C,R28*
X95765000Y16785716D03*
X94745000Y16785716D03*
G04 #@! TD*
D25*
G04 #@! TO.C,C39*
X21280000Y24100000D03*
X20320000Y24100000D03*
G04 #@! TD*
D31*
G04 #@! TO.C,U1*
X87050000Y17550000D03*
D32*
X88550000Y17550000D03*
X90050000Y17550000D03*
X91550000Y17550000D03*
X93050000Y17550000D03*
X93050000Y28450000D03*
X91550000Y28450000D03*
X90050000Y28450000D03*
X88550000Y28450000D03*
X87050000Y28450000D03*
G04 #@! TD*
D15*
G04 #@! TO.C,R23*
X95765000Y29314286D03*
X94745000Y29314286D03*
G04 #@! TD*
D25*
G04 #@! TO.C,C38*
X20180000Y19300000D03*
X19220000Y19300000D03*
G04 #@! TD*
D15*
G04 #@! TO.C,R45*
X93810000Y47600000D03*
X92790000Y47600000D03*
G04 #@! TD*
D33*
G04 #@! TO.C,U5*
X14400000Y31905000D03*
X14400000Y30635000D03*
X14400000Y29365000D03*
X14400000Y28095000D03*
X21600000Y28095000D03*
X21600000Y29365000D03*
X21600000Y30635000D03*
X21600000Y31905000D03*
G04 #@! TD*
D26*
G04 #@! TO.C,C37*
X29700000Y26125000D03*
X29700000Y27675000D03*
G04 #@! TD*
D19*
G04 #@! TO.C,R35*
X11740000Y29035000D03*
X12760000Y29035000D03*
G04 #@! TD*
D34*
G04 #@! TO.C,U6*
X25200000Y21300000D03*
X25200000Y19700000D03*
X26800000Y21300000D03*
X26800000Y19700000D03*
D35*
X22562500Y23100000D03*
X22562500Y22700000D03*
X22562500Y22300000D03*
X22562500Y21900000D03*
X22562500Y21500000D03*
X22562500Y21100000D03*
X22562500Y20700000D03*
X22562500Y20300000D03*
X22562500Y19900000D03*
X22562500Y19500000D03*
X22562500Y19100000D03*
X22562500Y18700000D03*
X22562500Y18300000D03*
X22562500Y17900000D03*
D36*
X23400000Y17062500D03*
X23800000Y17062500D03*
X24200000Y17062500D03*
X24600000Y17062500D03*
X25000000Y17062500D03*
X25400000Y17062500D03*
X25800000Y17062500D03*
X26200000Y17062500D03*
X26600000Y17062500D03*
X27000000Y17062500D03*
X27400000Y17062500D03*
X27800000Y17062500D03*
X28200000Y17062500D03*
X28600000Y17062500D03*
D35*
X29437500Y17900000D03*
X29437500Y18300000D03*
X29437500Y18700000D03*
X29437500Y19100000D03*
X29437500Y19500000D03*
X29437500Y19900000D03*
X29437500Y20300000D03*
X29437500Y20700000D03*
X29437500Y21100000D03*
X29437500Y21500000D03*
X29437500Y21900000D03*
X29437500Y22300000D03*
X29437500Y22700000D03*
X29437500Y23100000D03*
D36*
X28600000Y23937500D03*
X28200000Y23937500D03*
X27800000Y23937500D03*
X27400000Y23937500D03*
X27000000Y23937500D03*
X26600000Y23937500D03*
X26200000Y23937500D03*
X25800000Y23937500D03*
X25400000Y23937500D03*
X25000000Y23937500D03*
X24600000Y23937500D03*
X24200000Y23937500D03*
X23800000Y23937500D03*
X23400000Y23937500D03*
G04 #@! TD*
D22*
G04 #@! TO.C,C33*
X31100000Y25920000D03*
X31100000Y26880000D03*
G04 #@! TD*
D15*
G04 #@! TO.C,R27*
X95765000Y19291430D03*
X94745000Y19291430D03*
G04 #@! TD*
D13*
G04 #@! TO.C,C20*
X68195000Y55500000D03*
X69155000Y55500000D03*
G04 #@! TD*
D10*
G04 #@! TO.C,C9*
X49150000Y9900000D03*
X47600000Y9900000D03*
G04 #@! TD*
D37*
G04 #@! TO.C,F1*
X19627500Y67302500D03*
X17752500Y67302500D03*
G04 #@! TD*
D13*
G04 #@! TO.C,C12*
X15020000Y80200000D03*
X15980000Y80200000D03*
G04 #@! TD*
D19*
G04 #@! TO.C,R40*
X11740000Y30335000D03*
X12760000Y30335000D03*
G04 #@! TD*
D11*
G04 #@! TO.C,R37*
X25900000Y13990000D03*
X25900000Y15010000D03*
G04 #@! TD*
D13*
G04 #@! TO.C,C26*
X68195000Y23500000D03*
X69155000Y23500000D03*
G04 #@! TD*
G04 #@! TO.C,C19*
X68195000Y69500000D03*
X69155000Y69500000D03*
G04 #@! TD*
D38*
G04 #@! TO.C,X1*
X88125000Y66975000D03*
X88125000Y68825000D03*
X86675000Y68825000D03*
X86675000Y66975000D03*
G04 #@! TD*
D10*
G04 #@! TO.C,C15*
X71225000Y8900000D03*
X69675000Y8900000D03*
G04 #@! TD*
D27*
G04 #@! TO.C,SW3*
X1650000Y52900000D03*
X8150000Y52900000D03*
G04 #@! TD*
D39*
G04 #@! TO.C,R16*
X37200000Y74875000D03*
X37200000Y76525000D03*
G04 #@! TD*
D24*
G04 #@! TO.C,C17*
X65400000Y14760000D03*
X66950000Y14760000D03*
G04 #@! TD*
D40*
G04 #@! TO.C,U4*
X11725000Y18137500D03*
X12375000Y18137500D03*
X13025000Y18137500D03*
X13675000Y18137500D03*
X14325000Y18137500D03*
X14975000Y18137500D03*
X15625000Y18137500D03*
X16275000Y18137500D03*
X16275000Y23862500D03*
X15625000Y23862500D03*
X14975000Y23862500D03*
X14325000Y23862500D03*
X13675000Y23862500D03*
X13025000Y23862500D03*
X12375000Y23862500D03*
X11725000Y23862500D03*
G04 #@! TD*
D27*
G04 #@! TO.C,SW1*
X44750000Y10000000D03*
X38250000Y10000000D03*
G04 #@! TD*
D26*
G04 #@! TO.C,C3*
X35700000Y74925000D03*
X35700000Y76475000D03*
G04 #@! TD*
D11*
G04 #@! TO.C,R17*
X94550000Y70790000D03*
X94550000Y71810000D03*
G04 #@! TD*
D13*
G04 #@! TO.C,C34*
X31570000Y23900000D03*
X32530000Y23900000D03*
G04 #@! TD*
D15*
G04 #@! TO.C,R31*
X37510000Y64600000D03*
X36490000Y64600000D03*
G04 #@! TD*
D41*
G04 #@! TO.C,U3*
X21050000Y77637500D03*
X20100000Y77637500D03*
X19150000Y77637500D03*
X19150000Y75362500D03*
X21050000Y75362500D03*
G04 #@! TD*
D20*
G04 #@! TO.C,C60*
X8400000Y47030000D03*
X8400000Y46070000D03*
G04 #@! TD*
D42*
G04 #@! TO.C,U2*
X12350000Y69850000D03*
X14650000Y69850000D03*
D43*
X14650000Y76150000D03*
D42*
X16950000Y69850000D03*
G04 #@! TD*
D15*
G04 #@! TO.C,R25*
X95765000Y24302858D03*
X94745000Y24302858D03*
G04 #@! TD*
G04 #@! TO.C,R29*
X95765000Y14280000D03*
X94745000Y14280000D03*
G04 #@! TD*
D26*
G04 #@! TO.C,C61*
X7150000Y45425000D03*
X7150000Y46975000D03*
G04 #@! TD*
D15*
G04 #@! TO.C,R47*
X93810000Y46600000D03*
X92790000Y46600000D03*
G04 #@! TD*
D19*
G04 #@! TO.C,R6*
X14390000Y54814286D03*
X15410000Y54814286D03*
G04 #@! TD*
D10*
G04 #@! TO.C,C11*
X20925000Y73600000D03*
X19375000Y73600000D03*
G04 #@! TD*
D44*
G04 #@! TO.C,J4*
X41395000Y72030000D03*
X46445000Y72030000D03*
X41395000Y69490000D03*
X46445000Y69490000D03*
X41395000Y66950000D03*
X46445000Y66950000D03*
X41395000Y64410000D03*
X46445000Y64410000D03*
X41395000Y61870000D03*
X46445000Y61870000D03*
X41395000Y59330000D03*
X46445000Y59330000D03*
X41395000Y56790000D03*
X46445000Y56790000D03*
X41395000Y54250000D03*
X46445000Y54250000D03*
X41395000Y51710000D03*
X46445000Y51710000D03*
X41395000Y49170000D03*
X46445000Y49170000D03*
X41395000Y46630000D03*
X46445000Y46630000D03*
X41395000Y44090000D03*
X46445000Y44090000D03*
X41395000Y41550000D03*
X46445000Y41550000D03*
X41395000Y39010000D03*
X46445000Y39010000D03*
X41395000Y36470000D03*
X46445000Y36470000D03*
X41395000Y33930000D03*
X46445000Y33930000D03*
X41395000Y31390000D03*
X46445000Y31390000D03*
X41395000Y28850000D03*
X46445000Y28850000D03*
X41395000Y26310000D03*
X46445000Y26310000D03*
X41395000Y23770000D03*
X46445000Y23770000D03*
X77395000Y72030000D03*
X82445000Y72030000D03*
X77395000Y69490000D03*
X82445000Y69490000D03*
X77395000Y66950000D03*
X82445000Y66950000D03*
X77395000Y64410000D03*
X82445000Y64410000D03*
X77395000Y61870000D03*
X82445000Y61870000D03*
X77395000Y59330000D03*
X82445000Y59330000D03*
X77395000Y56790000D03*
X82445000Y56790000D03*
X77395000Y54250000D03*
X82445000Y54250000D03*
X77395000Y51710000D03*
X82445000Y51710000D03*
X77395000Y49170000D03*
X82445000Y49170000D03*
X77395000Y46630000D03*
X82445000Y46630000D03*
X77395000Y44090000D03*
X82445000Y44090000D03*
X77395000Y41550000D03*
X82445000Y41550000D03*
X77395000Y39010000D03*
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1428
site/public/gerber-demo/board/tinytapeout-demo-User_2.gbr Normal file
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209
site/public/gerber-demo/board/tinytapeout-demo-job.gbrjob Normal file
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{
"Header": {
"GenerationSoftware": {
"Vendor": "KiCad",
"Application": "Pcbnew",
"Version": "7.0.9-7.0.9~ubuntu22.04.1"
},
"CreationDate": "2023-12-15T15:20:45-05:00"
},
"GeneralSpecs": {
"ProjectId": {
"Name": "tinytapeout-demo",
"GUID": "74696e79-7461-4706-956f-75742d64656d",
"Revision": "0.9.4"
},
"Size": {
"X": 104.6,
"Y": 81.1
},
"LayerNumber": 4,
"BoardThickness": 1.5625,
"Finish": "None",
"ImpedanceControlled": true
},
"DesignRules": [
{
"Layers": "Outer",
"PadToPad": 0.18,
"PadToTrack": 0.18,
"TrackToTrack": 0.2,
"MinLineWidth": 0.16,
"TrackToRegion": 0.25,
"RegionToRegion": 0.25
},
{
"Layers": "Inner",
"PadToPad": 0.18,
"PadToTrack": 0.18,
"TrackToTrack": 0.2,
"MinLineWidth": 0.23,
"TrackToRegion": 0.25,
"RegionToRegion": 0.25
}
],
"FilesAttributes": [
{
"Path": "tinytapeout-demo-F_Cu.gbr",
"FileFunction": "Copper,L1,Top",
"FilePolarity": "Positive"
},
{
"Path": "tinytapeout-demo-In1_Cu.gbr",
"FileFunction": "Copper,L2,Inr",
"FilePolarity": "Positive"
},
{
"Path": "tinytapeout-demo-In2_Cu.gbr",
"FileFunction": "Copper,L3,Inr",
"FilePolarity": "Positive"
},
{
"Path": "tinytapeout-demo-B_Cu.gbr",
"FileFunction": "Copper,L4,Bot",
"FilePolarity": "Positive"
},
{
"Path": "tinytapeout-demo-F_Paste.gbr",
"FileFunction": "SolderPaste,Top",
"FilePolarity": "Positive"
},
{
"Path": "tinytapeout-demo-B_Paste.gbr",
"FileFunction": "SolderPaste,Bot",
"FilePolarity": "Positive"
},
{
"Path": "tinytapeout-demo-F_Silkscreen.gbr",
"FileFunction": "Legend,Top",
"FilePolarity": "Positive"
},
{
"Path": "tinytapeout-demo-B_Silkscreen.gbr",
"FileFunction": "Legend,Bot",
"FilePolarity": "Positive"
},
{
"Path": "tinytapeout-demo-F_Mask.gbr",
"FileFunction": "SolderMask,Top",
"FilePolarity": "Negative"
},
{
"Path": "tinytapeout-demo-B_Mask.gbr",
"FileFunction": "SolderMask,Bot",
"FilePolarity": "Negative"
},
{
"Path": "tinytapeout-demo-Edge_Cuts.gbr",
"FileFunction": "Profile",
"FilePolarity": "Positive"
},
{
"Path": "tinytapeout-demo-User_2.gbr",
"FileFunction": "Other,User",
"FilePolarity": "Positive"
}
],
"MaterialStackup": [
{
"Type": "Legend",
"Color": "White",
"Name": "Top Silk Screen"
},
{
"Type": "SolderPaste",
"Name": "Top Solder Paste"
},
{
"Type": "SolderMask",
"Color": "Green",
"Thickness": 0.01,
"Name": "Top Solder Mask"
},
{
"Type": "Copper",
"Thickness": 0.035,
"Name": "F.Cu"
},
{
"Type": "Dielectric",
"Color": "R109G116B75",
"Thickness": 0.0681,
"Material": "R-1551(W)",
"DielectricConstant": "4.3",
"LossTangent": "0.02",
"Name": "F.Cu/In1.Cu (1/2)",
"Notes": "Type: dielectric layer 1 - 1/2 (from F.Cu to In1.Cu)"
},
{
"Type": "Dielectric",
"Color": "R109G116B75",
"Thickness": 0.0681,
"Material": "R-1551(W)",
"DielectricConstant": "4.3",
"LossTangent": "0.02",
"Name": "F.Cu/In1.Cu (2/2)",
"Notes": "Type: dielectric layer 1 - 2/2 (from F.Cu to In1.Cu)"
},
{
"Type": "Copper",
"Thickness": 0.035,
"Name": "In1.Cu"
},
{
"Type": "Dielectric",
"Color": "R109G116B75",
"Thickness": 1.13,
"Material": "R-1566(W)",
"DielectricConstant": "4.6",
"LossTangent": "0.02",
"Name": "In1.Cu/In2.Cu",
"Notes": "Type: dielectric layer 2 (from In1.Cu to In2.Cu)"
},
{
"Type": "Copper",
"Thickness": 0.035,
"Name": "In2.Cu"
},
{
"Type": "Dielectric",
"Color": "R109G116B75",
"Thickness": 0.0681,
"Material": "R-1551(W)",
"DielectricConstant": "4.3",
"LossTangent": "0.02",
"Name": "In2.Cu/B.Cu (1/2)",
"Notes": "Type: dielectric layer 3 - 1/2 (from In2.Cu to B.Cu)"
},
{
"Type": "Dielectric",
"Color": "R109G116B75",
"Thickness": 0.0681,
"Material": "R-1551(W)",
"DielectricConstant": "4.3",
"LossTangent": "0.02",
"Name": "In2.Cu/B.Cu (2/2)",
"Notes": "Type: dielectric layer 3 - 2/2 (from In2.Cu to B.Cu)"
},
{
"Type": "Copper",
"Thickness": 0.035,
"Name": "B.Cu"
},
{
"Type": "SolderMask",
"Color": "Green",
"Thickness": 0.01,
"Name": "Bottom Solder Mask"
},
{
"Type": "SolderPaste",
"Name": "Bottom Solder Paste"
},
{
"Type": "Legend",
"Color": "White",
"Name": "Bottom Silk Screen"
}
]
}

314
site/public/gerber-demo/boot.js Normal file
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/*
* Self-contained boot harness for the KiCad Gerber viewer (gerbview) WASM,
* embedded in the blog post via an <iframe>. Adapted from the proven test
* harness (tests/apps/kicad/gerbview.html) and the React port
* (web/standalone/src/wasm/boot.ts) — same global `Module`, same preRun steps,
* same wx.js -> wx-dom.js -> gerbview.js injection order.
*
* Classic script (NOT a module): the non-modularized WASM glue reads a GLOBAL
* `var Module` and a GLOBAL `mainWindow`, and publishes `FS` onto the global
* scope. Top-level `var`/`const` here share that global scope.
*
* Asset layout, split because the pthread worker script MUST be same-origin
* (a Worker can't be created from a cross-origin URL). So the small glue stays
* on the site origin and only the big binaries move to Cloudflare R2:
* GLUE_BASE : wx.js, wx-dom.js, gerbview.js, mainScriptUrlOrBlob (same-origin)
* BINARY_BASE : gerbview.wasm, kicad-resources.bin (R2 in prod, local in dev)
*
* BINARY_BASE auto-switches by hostname: localhost → the local mirror (./wasm),
* any other host → R2_BASE below. Override either base with ?glue=/?bin=.
* To point at R2, set R2_BASE to your bucket's public URL — either a custom
* domain (https://assets.pcbjam.com) or the managed https://<id>.r2.dev URL.
*/
(function () {
"use strict";
// R2 bucket public URL (no trailing slash). Custom domain for the
// pcbjam-assets bucket (the managed URL https://pub-cecc0239e6f74d99ba7d06630bd87c64.r2.dev
// also still works).
var R2_BASE = "https://assets.pcbjam.com";
var params = new URLSearchParams(location.search);
var isLocal = /^(localhost|127\.0\.0\.1|\[?::1\]?)$/.test(location.hostname);
var GLUE_BASE = (params.get("glue") || "./wasm").replace(/\/+$/, "");
var BINARY_BASE = (params.get("bin") || (isLocal ? "./wasm" : R2_BASE)).replace(
/\/+$/,
""
);
// KiCad paths baked into the WASM build (see web/standalone/src/wasm/constants.ts).
var KICAD_VERSION_DIR = "9.99";
var KICAD_CONFIG_DIR =
"/home/kicad/.config/kicad/kicad/" + KICAD_VERSION_DIR;
var RESOURCE_PATH =
"/workspace/build-wasm/sysroot/share/kicad/resources";
// The board to auto-open: all tiny_tapeout layers (bottom→top for a sensible
// draw order). The .gbrjob is preloaded too but we open the individual layer
// files (gerbview opens gerber/drill files from argv deterministically).
var BOARD_DIR = "/home/kicad/demo";
var BOARD_FILES = [
"tinytapeout-demo-Edge_Cuts.gbr",
"tinytapeout-demo-B_Cu.gbr",
"tinytapeout-demo-In2_Cu.gbr",
"tinytapeout-demo-In1_Cu.gbr",
"tinytapeout-demo-F_Cu.gbr",
"tinytapeout-demo-B_Mask.gbr",
"tinytapeout-demo-F_Mask.gbr",
"tinytapeout-demo-B_Paste.gbr",
"tinytapeout-demo-F_Paste.gbr",
"tinytapeout-demo-B_Silkscreen.gbr",
"tinytapeout-demo-F_Silkscreen.gbr",
"tinytapeout-demo-User_2.gbr",
"tinytapeout-demo-PTH.drl",
"tinytapeout-demo-NPTH.drl",
"tinytapeout-demo-job.gbrjob",
];
var OPEN_FILES = BOARD_FILES.filter(function (f) {
return /\.(gbr|drl)$/.test(f);
});
var OPEN_ARGS = OPEN_FILES.map(function (f) {
return BOARD_DIR + "/" + f;
});
// ── Status UI ──────────────────────────────────────────────────────────────
var statusText = document.getElementById("status-text");
var progressBar = document.getElementById("progress-bar");
function setStatusUI(text) {
if (statusText) statusText.textContent = text;
var m = /(\d+)\/(\d+)/.exec(text || "");
if (m && progressBar) {
progressBar.style.width =
(parseInt(m[1], 10) / parseInt(m[2], 10)) * 100 + "%";
}
}
function hideStatus() {
var s = document.getElementById("status");
if (s) s.style.display = "none";
}
function showError(msg) {
console.error("[KICAD_ERROR] " + msg);
if (statusText) {
statusText.textContent = "Error: " + msg;
statusText.style.color = "#ff6b6b";
}
}
// The WASM reads the top frame geometry from a GLOBAL `mainWindow` element.
var mainWindow = document.getElementById("main-window");
window.mainWindow = mainWindow;
// ── Prefetch the heavy, non-wasm assets in parallel with the wasm download ──
// images.tar.gz (compiled-in KiCad resources) and the board layers. Both are
// ~10x smaller than gerbview.wasm, so they land before preRun runs; a run
// dependency guards the rare case where the wasm wins the race.
var resourceData = null;
// Served without a .gz extension on purpose (see sync-demo-wasm.sh) so no
// server adds Content-Encoding: gzip. Written into MEMFS as images.tar.gz.
fetch(BINARY_BASE + "/kicad-resources.bin")
.then(function (r) {
if (!r.ok) throw new Error("HTTP " + r.status);
return r.arrayBuffer();
})
.then(function (buf) {
resourceData = new Uint8Array(buf);
console.log("[KICAD] prefetched images.tar.gz (" + resourceData.length + " bytes)");
})
.catch(function (err) {
console.warn("[KICAD] images.tar.gz prefetch failed:", err.message);
});
var boardData = null; // { name: Uint8Array }
var boardPromise = Promise.all(
BOARD_FILES.map(function (name) {
return fetch("./board/" + name)
.then(function (r) {
if (!r.ok) throw new Error("HTTP " + r.status + " for " + name);
return r.arrayBuffer();
})
.then(function (buf) {
return [name, new Uint8Array(buf)];
});
})
)
.then(function (pairs) {
boardData = {};
pairs.forEach(function (p) {
boardData[p[0]] = p[1];
});
console.log("[KICAD] prefetched " + pairs.length + " board files");
})
.catch(function (err) {
console.error("[KICAD] board prefetch failed:", err.message);
});
// ── preRun steps ────────────────────────────────────────────────────────────
function createCanvas() {
var canvas = document.createElement("canvas");
canvas.id = "canvas";
canvas.style.display = "none";
canvas.style.width = window.innerWidth + "px";
canvas.style.height = window.innerHeight + "px";
canvas.oncontextmenu = function (e) {
e.preventDefault();
};
canvas.addEventListener(
"webglcontextlost",
function (e) {
showError("WebGL context lost — reload to retry.");
e.preventDefault();
},
false
);
mainWindow.appendChild(canvas);
Module.canvas = canvas;
console.log("[KICAD] canvas " + window.innerWidth + "x" + window.innerHeight);
}
function writeResources() {
FS.mkdirTree(RESOURCE_PATH);
if (resourceData) {
FS.writeFile(RESOURCE_PATH + "/images.tar.gz", resourceData);
console.log("[KICAD] wrote images.tar.gz");
} else {
console.warn("[KICAD] images.tar.gz not ready at preRun");
}
}
// Suppress the first-run setup wizard (its modal loop crashes Asyncify on our
// ephemeral MEMFS): make every settings provider report NeedsUserInput()==false.
function seedKicadConfig() {
FS.mkdirTree(KICAD_CONFIG_DIR);
var seed = function (path, contents) {
if (FS.analyzePath(path).exists) return;
FS.writeFile(path, contents);
};
seed(
KICAD_CONFIG_DIR + "/kicad_common.json",
JSON.stringify(
{
do_not_show_again: {
update_check_prompt: true,
data_collection_prompt: true,
},
},
null,
2
)
);
seed(KICAD_CONFIG_DIR + "/sym-lib-table", "(sym_lib_table\n (version 7)\n)\n");
seed(KICAD_CONFIG_DIR + "/fp-lib-table", "(fp_lib_table\n (version 7)\n)\n");
seed(
KICAD_CONFIG_DIR + "/design-block-lib-table",
"(design_block_lib_table\n (version 7)\n)\n"
);
console.log("[KICAD] seeded config (wizard suppressed)");
}
// Write the board into MEMFS and point argv at it so gerbview auto-opens it.
// argv must be set before main(); a run dependency keeps main() waiting if the
// board fetch hasn't landed yet.
function preloadBoard() {
Module.arguments = OPEN_ARGS;
var writeBoard = function () {
if (!boardData) return;
FS.mkdirTree(BOARD_DIR);
Object.keys(boardData).forEach(function (name) {
FS.writeFile(BOARD_DIR + "/" + name, boardData[name]);
});
console.log("[KICAD] wrote board into " + BOARD_DIR + "; argv=" + OPEN_ARGS.length + " files");
};
if (boardData) {
writeBoard();
return;
}
var add = window.addRunDependency;
var rm = window.removeRunDependency;
if (typeof add === "function" && typeof rm === "function") {
add("board-files");
boardPromise.then(function () {
writeBoard();
rm("board-files");
});
} else {
// Best-effort fallback (board << wasm, so this path is unlikely to lose).
boardPromise.then(writeBoard);
}
}
// ── Module config (global) ───────────────────────────────────────────────────
var Module = {
thisProgram: "/usr/bin/gerbview", // argv[0] for KiCad's DEBUG check
arguments: OPEN_ARGS,
preRun: [createCanvas, writeResources, seedKicadConfig, preloadBoard],
postRun: [],
print: function () {
console.log("[KICAD_OUT] " + Array.prototype.join.call(arguments, " "));
},
printErr: function () {
console.error("[KICAD_ERR] " + Array.prototype.join.call(arguments, " "));
},
setStatus: function (text) {
if (text) console.log("[KICAD_STATUS] " + text);
setStatusUI(text);
},
totalDependencies: 0,
monitorRunDependencies: function (left) {
this.totalDependencies = Math.max(this.totalDependencies, left);
Module.setStatus(
left
? "Preparing… (" + (this.totalDependencies - left) + "/" + this.totalDependencies + ")"
: "All downloads complete."
);
},
onRuntimeInitialized: function () {
console.log("[KICAD] runtime initialized");
if (Module.canvas) Module.canvas.style.display = "block";
hideStatus();
},
onAbort: function (what) {
showError("aborted: " + (what === undefined ? "" : String(what)));
},
// Route the .wasm to BINARY_BASE; everything else (the pthread worker) to GLUE_BASE.
locateFile: function (path) {
return (/\.wasm$/.test(path) ? BINARY_BASE : GLUE_BASE) + "/" + path;
},
// Pin the pthread worker to the same-origin glue (workers cannot be cross-origin).
mainScriptUrlOrBlob: GLUE_BASE + "/gerbview.js",
};
window.Module = Module;
Module.setStatus("Downloading…");
window.onerror = function (msg, url, line) {
showError(msg + " @ " + url + ":" + line);
return false;
};
// ── Inject glue scripts in the required order ────────────────────────────────
function loadScript(src) {
return new Promise(function (resolve, reject) {
var s = document.createElement("script");
s.src = src;
s.onload = resolve;
s.onerror = function () {
reject(new Error("failed to load " + src));
};
document.body.appendChild(s);
});
}
loadScript(GLUE_BASE + "/wx.js")
.then(function () {
return loadScript(GLUE_BASE + "/wx-dom.js");
})
.then(function () {
return loadScript(GLUE_BASE + "/gerbview.js");
})
.then(function () {
console.log("[KICAD] injected wx.js + wx-dom.js + gerbview.js (glue=" + GLUE_BASE + ", bin=" + BINARY_BASE + ")");
})
.catch(function (err) {
showError(err.message);
});
})();

89
site/public/gerber-demo/index.html Normal file
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1" />
<title>PCBJam — Gerber viewer demo</title>
<style>
html,
body {
margin: 0;
padding: 0;
width: 100%;
height: 100%;
overflow: hidden;
background: #0b1020;
}
/* The canvas must have no border/padding or mouse coords go wrong. */
.emscripten {
padding-right: 0;
margin-left: auto;
margin-right: auto;
display: block;
}
div.emscripten {
text-align: center;
}
canvas.emscripten {
border: 0px none;
}
/* wxWidgets-DOM per-window overlays (created by wx.js, appended to
#window-container). Mirror the proven harness exactly. */
.window {
position: absolute;
pointer-events: none;
z-index: 10;
background-color: black;
overflow: hidden;
width: 0;
height: 0;
}
.window-canvas {
position: absolute;
top: 0;
left: 0;
pointer-events: none;
}
#status {
position: fixed;
left: 12px;
bottom: 12px;
z-index: 1000;
font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
font-size: 12px;
color: #e7ecf5;
background: rgba(11, 16, 32, 0.85);
border: 1px solid #233052;
padding: 8px 10px;
border-radius: 8px;
}
#progress {
width: 240px;
height: 6px;
margin-top: 6px;
background: #233052;
border-radius: 3px;
overflow: hidden;
}
#progress-bar {
height: 100%;
width: 0%;
background: #4f7cff;
transition: width 0.25s;
}
</style>
</head>
<body>
<div
id="main-window"
style="width: 100vw; height: 100vh; position: absolute; top: 0; left: 0"
></div>
<div id="window-container"></div>
<div id="status">
<div id="status-text">Initializing…</div>
<div id="progress"><div id="progress-bar"></div></div>
</div>
<!-- Classic script (not a module): the WASM glue needs global Module / mainWindow / FS. -->
<script src="./boot.js"></script>
</body>
</html>

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{
"rules": [
{
"allowed": {
"origins": [
"https://pcbjam.com",
"https://www.pcbjam.com",
"https://*.vercel.app",
"http://localhost:4321"
],
"methods": ["GET", "HEAD"],
"headers": ["*"]
},
"exposeHeaders": ["Content-Length", "Content-Encoding", "Content-Type"],
"maxAgeSeconds": 86400
}
]
}

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#!/usr/bin/env bash
# Deploy the heavy Gerber-viewer binaries to Cloudflare R2.
#
# Prereqs (one-time, done by you — see the chat guide):
# 1. R2 enabled on your Cloudflare account (dashboard; needs a payment method).
# 2. `wrangler login` (browser auth).
#
# This script then (idempotent — safe to re-run after a rebuild):
# - creates the bucket (skips if it already exists)
# - sets CORS (site/scripts/r2-cors.json)
# - enables the public r2.dev URL and prints it
# - gzips gerbview.wasm and uploads it (Content-Encoding: gzip) + kicad-resources.bin
#
# Usage: site/scripts/r2-deploy.sh [bucket-name] (default: pcbjam-assets)
set -euo pipefail
BUCKET="${1:-pcbjam-assets}"
ROOT="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)" # = site/
SRC="$ROOT/public/gerber-demo/wasm"
TMP="$(mktemp -d)"; trap 'rm -rf "$TMP"' EXIT
command -v wrangler >/dev/null || { echo "wrangler not found (npm i -g wrangler)"; exit 1; }
wrangler whoami >/dev/null 2>&1 || { echo "Not logged in. Run: wrangler login"; exit 1; }
[[ -f "$SRC/gerbview.wasm" ]] || { echo "Missing $SRC/gerbview.wasm — run scripts/sync-demo-wasm.sh"; exit 1; }
[[ -f "$SRC/kicad-resources.bin" ]] || { echo "Missing $SRC/kicad-resources.bin — run scripts/sync-demo-wasm.sh"; exit 1; }
echo "==> Bucket: $BUCKET"
wrangler r2 bucket create "$BUCKET" 2>/dev/null \
&& echo " created" \
|| echo " already exists (continuing)"
echo "==> CORS"
wrangler r2 bucket cors set "$BUCKET" --file "$ROOT/scripts/r2-cors.json"
echo "==> Public r2.dev URL (makes the bucket's objects publicly readable)"
wrangler r2 bucket dev-url enable "$BUCKET" || true
wrangler r2 bucket dev-url get "$BUCKET" || true
echo "==> gzip gerbview.wasm"
gzip -9 -c "$SRC/gerbview.wasm" > "$TMP/gerbview.wasm.gz"
echo " $(du -h "$SRC/gerbview.wasm" | cut -f1) -> $(du -h "$TMP/gerbview.wasm.gz" | cut -f1) gzipped"
echo "==> Upload gerbview.wasm (gzip, application/wasm)"
wrangler r2 object put "$BUCKET/gerbview.wasm" --remote \
--file "$TMP/gerbview.wasm.gz" \
--content-type "application/wasm" \
--content-encoding "gzip" \
--cache-control "public, max-age=3600"
echo "==> Upload kicad-resources.bin (octet-stream, no encoding)"
wrangler r2 object put "$BUCKET/kicad-resources.bin" --remote \
--file "$SRC/kicad-resources.bin" \
--content-type "application/octet-stream" \
--cache-control "public, max-age=3600"
echo ""
echo "Done. Copy the r2.dev URL printed above (https://<hash>.r2.dev) into"
echo "site/public/gerber-demo/boot.js -> R2_BASE, then redeploy the site."
echo "(Or bind a custom domain: wrangler r2 bucket domain add $BUCKET --domain assets.pcbjam.com)"

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#!/usr/bin/env bash
# Mirror the gerbview WASM build outputs into the blog demo's local asset dir.
#
# Phase A (local verification) serves the viewer from these files. They are
# git-ignored (see site/.gitignore): the 52 MB gerbview.wasm must never be
# committed or shipped to Vercel — in production the heavy binaries live on
# Cloudflare R2 (see the blog-demo plan, Phase B). Re-run this after rebuilding
# gerbview to refresh the local copy.
set -euo pipefail
ROOT="$(cd "$(dirname "${BASH_SOURCE[0]}")/../.." && pwd)"
SRC="$ROOT/output"
DST="$ROOT/site/public/gerber-demo/wasm"
mkdir -p "$DST"
for f in wx.js wx-dom.js gerbview.js gerbview.wasm images.tar.gz; do
if [[ ! -f "$SRC/$f" ]]; then
echo "ERROR: missing $SRC/$f — build gerbview first (docker/build.sh)." >&2
exit 1
fi
done
cp "$SRC/wx.js" "$DST/wx.js"
cp "$SRC/wx-dom.js" "$DST/wx-dom.js"
cp "$SRC/gerbview.js" "$DST/gerbview.js"
cp "$SRC/gerbview.wasm" "$DST/gerbview.wasm"
# Store the resources tarball WITHOUT a .gz extension: dev servers (Vite/sirv)
# and some CDNs auto-add `Content-Encoding: gzip` for `*.gz`, which makes the
# browser pre-decompress it — then KiCad's own gunzip fails. boot.js fetches
# this name and writes it into MEMFS as images.tar.gz.
cp "$SRC/images.tar.gz" "$DST/kicad-resources.bin"
for f in wx.js wx-dom.js gerbview.js gerbview.wasm kicad-resources.bin; do
echo "synced $f ($(du -h "$DST/$f" | cut -f1))"
done
echo "Local demo WASM ready at $DST"

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---
/**
* Interactive, lazily-loaded KiCad Gerber viewer embedded in a blog post.
*
* Nothing heavy loads on page view: the ~22 MB (gzipped) WASM is fetched only
* when the reader activates the viewer, which mounts an <iframe> pointing at the
* self-contained boot page (public/gerber-demo/index.html).
*
* The live viewer needs cross-origin isolation (SharedArrayBuffer + pthreads)
* and WebGL2. We feature-detect and degrade gracefully: capable browsers get the
* live viewer; everything else gets a static poster + a short note. COOP/COEP are
* applied to this route (dev: astro.config.mjs; prod: vercel.json); because
* Astro's <ClientRouter/> can deliver this page via a soft SPA swap (which is
* NOT cross-origin isolated), the client script does one guarded reload so the
* route headers take effect.
*/
const poster = "/gerber-demo/poster.png"; // captured screenshot; optional fallback art
const caption =
"KiCad's Gerber viewer (gerbview), compiled to WebAssembly, running the tiny_tapeout demo board entirely in your browser.";
---
<figure class="gerber-demo not-prose" data-state="idle">
<div class="gerber-demo__frame">
<!-- Poster / launch surface. The href is a real fallback: with JS off (or if
we choose to), it opens the standalone demo page. JS intercepts it to
embed inline. -->
<a
class="gerber-demo__launch"
href="/gerber-demo/index.html"
style={`background-image:url(${poster})`}
>
<span class="gerber-demo__play" aria-hidden="true">▶</span>
<span class="gerber-demo__cta">Launch Gerber viewer</span>
<span class="gerber-demo__sub">~22 MB · loads on demand · runs locally in your browser</span>
</a>
<!-- Shown only when the browser can't run the live viewer. -->
<div class="gerber-demo__fallback" hidden>
<p class="gerber-demo__fallback-title">Live demo unavailable in this browser</p>
<p class="gerber-demo__sub">
The in-browser viewer needs a recent desktop <strong>Chrome</strong>,
<strong>Firefox</strong>, or <strong>Safari 16+</strong> (it relies on
SharedArrayBuffer + WebGL2). Here's a screenshot of what it renders.
</p>
</div>
<!-- Status line while the WASM downloads/boots. -->
<div class="gerber-demo__status" hidden>
<span class="gerber-demo__spinner" aria-hidden="true"></span>
<span class="gerber-demo__status-text">Loading the viewer…</span>
</div>
</div>
<figcaption class="gerber-demo__caption">{caption}</figcaption>
</figure>
<script>
const BOOT_SRC = "/gerber-demo/index.html";
const RELOAD_KEY = "gerber-demo-coi-reload";
function hasWebGL2(): boolean {
try {
return !!document.createElement("canvas").getContext("webgl2");
} catch {
return false;
}
}
function launch(root: HTMLElement): void {
if (root.dataset.state === "loading" || root.dataset.state === "ready") return;
root.dataset.state = "loading";
const status = root.querySelector<HTMLElement>(".gerber-demo__status");
if (status) status.hidden = false;
const iframe = document.createElement("iframe");
iframe.src = BOOT_SRC;
iframe.title = "KiCad Gerber viewer";
// Delegate cross-origin isolation to the (same-origin) iframe so it can use
// SharedArrayBuffer / pthreads.
iframe.allow = "cross-origin-isolated; fullscreen";
iframe.setAttribute("allowfullscreen", "");
iframe.className = "gerber-demo__iframe";
// Size via INLINE styles, not the scoped stylesheet: this element is created
// in JS so it lacks Astro's data-astro-cid scope attribute, and the scoped
// `.gerber-demo__iframe` rule would not match it (it would fall back to the
// 300x150 iframe default, shrinking the whole viewer).
iframe.style.cssText =
"position:absolute;inset:0;width:100%;height:100%;border:0;display:block;";
iframe.addEventListener("load", () => {
root.dataset.state = "ready";
if (status) status.hidden = true;
});
const frame = root.querySelector(".gerber-demo__frame");
frame?.appendChild(iframe);
}
function showFallback(root: HTMLElement): void {
root.dataset.state = "unsupported";
const launchEl = root.querySelector<HTMLElement>(".gerber-demo__launch");
const fallback = root.querySelector<HTMLElement>(".gerber-demo__fallback");
// Keep the poster (it's the <a> background); hide the play affordance, show note.
launchEl?.querySelector(".gerber-demo__play")?.setAttribute("hidden", "");
launchEl?.querySelector(".gerber-demo__cta")?.setAttribute("hidden", "");
launchEl?.querySelector(".gerber-demo__sub")?.setAttribute("hidden", "");
if (launchEl) {
launchEl.removeAttribute("href"); // not clickable
launchEl.style.cursor = "default";
}
if (fallback) fallback.hidden = false;
}
function initDemo(): void {
const root = document.querySelector<HTMLElement>(".gerber-demo");
if (!root) return; // page without the demo
const isolated = window.crossOriginIsolated === true;
// Soft SPA navigation lands here NOT cross-origin isolated; force one real
// load so the route's COOP/COEP headers apply. Guard against reload loops.
if (!isolated) {
if (!sessionStorage.getItem(RELOAD_KEY)) {
sessionStorage.setItem(RELOAD_KEY, "1");
location.reload();
return;
}
// Already retried and still not isolated → genuinely unsupported (or no
// headers, e.g. a preview without vercel.json). Fall back.
} else {
sessionStorage.removeItem(RELOAD_KEY);
}
const supported =
isolated && typeof SharedArrayBuffer !== "undefined" && hasWebGL2();
if (!supported) {
showFallback(root);
return;
}
const launchEl = root.querySelector<HTMLElement>(".gerber-demo__launch");
launchEl?.addEventListener("click", (e) => {
e.preventDefault(); // intercept the href; embed inline instead
launch(root);
});
}
// Run on first load and on every SPA navigation (ClientRouter).
document.addEventListener("astro:page-load", initDemo);
</script>
<style>
.gerber-demo {
margin: 2rem 0;
}
.gerber-demo__frame {
position: relative;
width: 100%;
aspect-ratio: 16 / 10;
min-height: 360px;
border: 1px solid var(--border);
border-radius: var(--radius-lg);
overflow: hidden;
background: var(--bg-soft);
}
/* Launch surface (poster + CTA). */
.gerber-demo__launch {
position: absolute;
inset: 0;
display: flex;
flex-direction: column;
align-items: center;
justify-content: center;
gap: 0.5rem;
text-decoration: none;
color: var(--fg);
background-size: cover;
background-position: center;
background-color: var(--bg-soft);
transition: filter var(--dur) var(--ease);
}
.gerber-demo__launch::before {
/* Dim the poster so the CTA reads clearly. */
content: "";
position: absolute;
inset: 0;
background: linear-gradient(
180deg,
rgba(11, 16, 32, 0.45),
rgba(11, 16, 32, 0.7)
);
}
.gerber-demo__launch:hover {
filter: brightness(1.06);
text-decoration: none;
}
.gerber-demo__play {
position: relative;
display: grid;
place-items: center;
width: 64px;
height: 64px;
border-radius: 999px;
background: var(--brand-600);
color: #fff;
font-size: 1.5rem;
padding-left: 4px;
box-shadow: 0 6px 24px rgba(0, 0, 0, 0.35);
}
.gerber-demo__cta {
position: relative;
font-weight: 600;
font-size: 1.05rem;
}
.gerber-demo__sub {
position: relative;
font-family: var(--font-mono);
font-size: 0.78rem;
color: var(--fg-muted);
text-align: center;
max-width: 32rem;
padding: 0 1rem;
}
.gerber-demo__iframe {
position: absolute;
inset: 0;
width: 100%;
height: 100%;
border: 0;
display: block;
}
.gerber-demo__status {
position: absolute;
left: 50%;
bottom: 1rem;
transform: translateX(-50%);
display: flex;
align-items: center;
gap: 0.5rem;
font-family: var(--font-mono);
font-size: 0.8rem;
color: var(--fg);
background: rgba(11, 16, 32, 0.85);
border: 1px solid var(--border);
padding: 0.4rem 0.7rem;
border-radius: var(--radius);
}
.gerber-demo__spinner {
width: 12px;
height: 12px;
border: 2px solid var(--border);
border-top-color: var(--accent);
border-radius: 999px;
animation: gerber-spin 0.8s linear infinite;
}
@keyframes gerber-spin {
to {
transform: rotate(360deg);
}
}
.gerber-demo__fallback {
position: absolute;
inset: auto 0 0 0;
padding: 1rem 1.25rem;
background: rgba(11, 16, 32, 0.9);
border-top: 1px solid var(--border);
text-align: center;
}
.gerber-demo__fallback-title {
margin: 0 0 0.25rem;
font-weight: 600;
}
.gerber-demo__fallback .gerber-demo__sub {
position: static;
margin: 0 auto;
}
.gerber-demo__caption {
margin-top: 0.75rem;
font-size: 0.85rem;
color: var(--fg-muted);
line-height: 1.5;
}
@media (prefers-reduced-motion: reduce) {
.gerber-demo__spinner {
animation: none;
}
.gerber-demo__launch {
transition: none;
}
}
</style>

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site/src/content.config.ts
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@ -4,7 +4,7 @@ import { glob } from 'astro/loaders';
// Content Layer API (Astro 5+). Markdown files live in src/content/blog/.
// NOTE: this config file is src/content.config.ts — NOT src/content/config.ts.
const blog = defineCollection({
loader: glob({ pattern: '**/*.md', base: './src/content/blog' }),
loader: glob({ pattern: '**/*.{md,mdx}', base: './src/content/blog' }),
schema: z.object({
title: z.string(),
description: z.string(),

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site/src/content/blog/porting-kicad-graphics-to-webgl-with-claude.md
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---
title: "Porting KiCad's Graphics to WebGL with Claude"
description: "Coming soon."
pubDate: 2026-06-07
---
Coming soon.

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---
title: "Porting KiCad's Graphics to WebGL with Claude"
description: "Coming soon."
pubDate: 2026-06-07
---
import GerberDemo from '../../components/GerberDemo.astro';
{/* TODO(author): intro — the gerbview port and the graphics-abstraction-layer → WebGL work. */}
Coming soon.
## See it run: a Gerber viewer in your browser
The viewer below is KiCad's `gerbview` compiled to WebAssembly. Click to load it
(it streams ~22&nbsp;MB on demand) and it renders a real multi-layer board —
the [tiny_tapeout](https://tinytapeout.com/) demo — entirely client-side, with no
server doing the rasterization.
<GerberDemo />
{/* TODO(author): the rest of the article. */}

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import { defineMiddleware } from 'astro:middleware';
/**
* Dev-only cross-origin isolation for Astro-rendered pages.
*
* Vite's `server.headers` (astro.config.mjs) already cover static assets in
* public/ (the boot page + WASM), but Astro's dev page renderer writes its own
* response headers and drops them — so the blog post itself wouldn't be
* cross-origin isolated, and the embedded Gerber viewer's SharedArrayBuffer
* would be unavailable. Set them here for `npm run dev`.
*
* Production is static (output: 'static'); these headers come from vercel.json
* scoped to the post + /gerber-demo routes, so we no-op outside dev to keep the
* prerender/build output untouched.
*/
export const onRequest = defineMiddleware(async (_context, next) => {
const response = await next();
if (import.meta.env.DEV) {
response.headers.set('Cross-Origin-Opener-Policy', 'same-origin');
response.headers.set('Cross-Origin-Embedder-Policy', 'require-corp');
}
return response;
});

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{
"$schema": "https://openapi.vercel.sh/vercel.json",
"headers": [
{
"source": "/blog/porting-kicad-graphics-to-webgl-with-claude",
"headers": [
{ "key": "Cross-Origin-Opener-Policy", "value": "same-origin" },
{ "key": "Cross-Origin-Embedder-Policy", "value": "require-corp" }
]
},
{
"source": "/gerber-demo/(.*)",
"headers": [
{ "key": "Cross-Origin-Opener-Policy", "value": "same-origin" },
{ "key": "Cross-Origin-Embedder-Policy", "value": "require-corp" }
]
}
]
}