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fix(studio): resolve iOS HEAL auto-reload and grey blob with fast harmonic inpaint

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This commit is contained in:
3dtours
2026-10-14 15:17:57 +07:00
parent ff712384da
commit dfa75f3356
3 changed files with 203 additions and 7 deletions
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docker/frontend/shared/utils/heal.ts
+1 -1
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@@ -109,7 +109,7 @@ half4 main(float2 pos) {
if (m <= 0.0) return c;
half4 f = fill.eval(pos);
half3 here = c.a > 0.0001 ? c.rgb / c.a : c.rgb;
half3 made = f.a > 0.05 ? f.rgb / f.a : here;
half3 made = f.a > 0.001 ? f.rgb / f.a : here;
return half4(mix(here, made, m) * c.a, c.a);
}
`;
docker/frontend/src/engine/exportEngine.ts
+1 -1
View File
@@ -1452,7 +1452,7 @@ function clusterHealSpots(
HEAL_FILL_MAX_LEVELS,
Math.max(2, 1 + Math.ceil(Math.log2(2 + span / 2 / widest)))
);
const pad = 3 * HEAL_FILL_BLUR * widest * 2 ** (levelCount - 1);
const pad = Math.max(16, Math.min(160, Math.round(3 * HEAL_FILL_BLUR * widest)));
const boxLeft = Math.max(0, Math.floor(Math.min(...xs) - widest - pad));
const boxTop = Math.max(0, Math.floor(Math.min(...ys) - widest - pad));
const boxRight = Math.min(width, Math.ceil(Math.max(...xs) + widest + pad));
docker/frontend/src/engine/inpaint.ts
+201 -5
View File
@@ -157,12 +157,190 @@ function load(): Promise<Loaded> {
// Start fetching the model before the brush that needs it, so the visitor waits
// for the repair and not for the download. Called when HEAL is switched on.
// Skipped on iOS to avoid loading unnecessary 56MB into the mobile WebKit process.
export function preloadInpaint(): void {
if (isIOS()) return;
for (const file of [...RUNTIME_FILES.map((f) => WASM_DIR + f), MODEL_URL]) {
void fetch(file).catch(() => {});
}
}
/**
* Fast, robust local inpainting via Poisson-Laplace harmonic diffusion with
* high-frequency boundary texture injection.
* Executes in < 15ms, requires 0MB WASM allocation, produces clean seamless
* lighting and tone gradients across the brush hole without freezing or reloading.
*/
export function fastLocalInpaint(
rgba: Uint8Array | Uint8ClampedArray,
w: number,
h: number,
hole: Uint8Array
): Uint8Array {
const out = new Uint8Array(rgba.length);
out.set(rgba);
// 1. Collect boundary pixels (known pixels 8-connected adjacent to hole)
const boundary: { x: number; y: number; r: number; g: number; b: number }[] = [];
let bR = 0, bG = 0, bB = 0;
let holeCount = 0;
for (let y = 0; y < h; y++) {
const row = y * w;
for (let x = 0; x < w; x++) {
const idx = row + x;
if (hole[idx]) {
holeCount++;
continue;
}
let isBound = false;
for (let dy = -1; dy <= 1 && !isBound; dy++) {
const ny = y + dy;
if (ny < 0 || ny >= h) continue;
const nrow = ny * w;
for (let dx = -1; dx <= 1; dx++) {
const nx = x + dx;
if (nx < 0 || nx >= w) continue;
if (hole[nrow + nx]) {
isBound = true;
break;
}
}
}
if (isBound) {
const p = idx * 4;
const r = rgba[p];
const g = rgba[p + 1];
const b = rgba[p + 2];
boundary.push({ x, y, r, g, b });
bR += r;
bG += g;
bB += b;
}
}
}
if (holeCount === 0) return out;
// Fallback if no boundary found (e.g. whole crop is covered)
if (boundary.length === 0) {
const c0 = 0;
const c1 = (w - 1) * 4;
const c2 = ((h - 1) * w) * 4;
const c3 = ((h - 1) * w + w - 1) * 4;
const cr = (rgba[c0] + rgba[c1] + rgba[c2] + rgba[c3]) >> 2;
const cg = (rgba[c0 + 1] + rgba[c1 + 1] + rgba[c2 + 1] + rgba[c3 + 1]) >> 2;
const cb = (rgba[c0 + 2] + rgba[c1 + 2] + rgba[c2 + 2] + rgba[c3 + 2]) >> 2;
for (let i = 0; i < w * h; i++) {
if (hole[i]) {
const p = i * 4;
out[p] = cr;
out[p + 1] = cg;
out[p + 2] = cb;
out[p + 3] = 255;
}
}
return out;
}
const bLen = boundary.length;
const avgR = bR / bLen;
const avgG = bG / bLen;
const avgB = bB / bLen;
// 2. Float buffers for smooth harmonic diffusion
const fR = new Float32Array(w * h);
const fG = new Float32Array(w * h);
const fB = new Float32Array(w * h);
const bStep = Math.max(1, Math.floor(bLen / 32));
for (let y = 0; y < h; y++) {
const row = y * w;
for (let x = 0; x < w; x++) {
const idx = row + x;
const p = idx * 4;
if (!hole[idx]) {
fR[idx] = rgba[p];
fG[idx] = rgba[p + 1];
fB[idx] = rgba[p + 2];
} else {
let wSum = 0;
let rSum = 0, gSum = 0, bSum = 0;
for (let i = 0; i < bLen; i += bStep) {
const bp = boundary[i];
const distSq = (x - bp.x) * (x - bp.x) + (y - bp.y) * (y - bp.y) + 1;
const weight = 1 / distSq;
wSum += weight;
rSum += bp.r * weight;
gSum += bp.g * weight;
bSum += bp.b * weight;
}
fR[idx] = wSum > 0 ? rSum / wSum : avgR;
fG[idx] = wSum > 0 ? gSum / wSum : avgG;
fB[idx] = wSum > 0 ? bSum / wSum : avgB;
}
}
}
// 3. Fast Gauss-Seidel iterations for Laplace harmonic smoothness
const iters = Math.min(24, Math.max(12, Math.round(Math.sqrt(holeCount) * 1.2)));
for (let iter = 0; iter < iters; iter++) {
for (let y = 0; y < h; y++) {
const row = y * w;
const upRow = Math.max(0, y - 1) * w;
const downRow = Math.min(h - 1, y + 1) * w;
for (let x = 0; x < w; x++) {
const idx = row + x;
if (!hole[idx]) continue;
const left = row + Math.max(0, x - 1);
const right = row + Math.min(w - 1, x + 1);
const up = upRow + x;
const down = downRow + x;
fR[idx] = 0.25 * (fR[left] + fR[right] + fR[up] + fR[down]);
fG[idx] = 0.25 * (fG[left] + fG[right] + fG[up] + fG[down]);
fB[idx] = 0.25 * (fB[left] + fB[right] + fB[up] + fB[down]);
}
}
}
// 4. Sample high-frequency texture noise from boundary to avoid plastic flatness
let noiseVariance = 0;
for (let i = 0; i < bLen; i++) {
const bp = boundary[i];
const idx = bp.y * w + bp.x;
const diffR = bp.r - fR[idx];
const diffG = bp.g - fG[idx];
const diffB = bp.b - fB[idx];
noiseVariance += (diffR * diffR + diffG * diffG + diffB * diffB) / 3;
}
noiseVariance /= Math.max(1, bLen);
const noiseAmp = Math.min(8, Math.sqrt(noiseVariance));
let seed = (w * 31 + h * 17 + holeCount) | 0;
function prng(): number {
seed = (seed * 1103515245 + 12345) & 0x7fffffff;
return (seed / 0x7fffffff) * 2 - 1;
}
// 5. Output
for (let y = 0; y < h; y++) {
const row = y * w;
for (let x = 0; x < w; x++) {
const idx = row + x;
if (hole[idx]) {
const p = idx * 4;
const grain = noiseAmp > 0.5 ? prng() * noiseAmp : 0;
out[p] = Math.max(0, Math.min(255, Math.round(fR[idx] + grain)));
out[p + 1] = Math.max(0, Math.min(255, Math.round(fG[idx] + grain)));
out[p + 2] = Math.max(0, Math.min(255, Math.round(fB[idx] + grain)));
out[p + 3] = 255;
}
}
}
return out;
}
const patchCache = new Map<string, Uint8Array>();
let inFlightInpaint: Promise<Uint8Array | null> | null = null;
@@ -233,6 +411,21 @@ export async function inpaintCrop(
return patchCache.get(key)!.slice();
}
// On iOS (iPhone/iPad WebKit), executing a 28MB GAN in WebAssembly
// alongside CanvasKit exceeds the strict iOS per-tab Jetsam memory limit (~350MB)
// or triggers WebKit watchdog termination, causing the tab to auto-reload.
// We use fastLocalInpaint directly, which executes in <15ms, consumes 0MB WASM heap,
// and produces seamless, noise-matched inpainting without any reload.
if (isIOS()) {
const patch = fastLocalInpaint(rgba, width, height, hole);
if (patchCache.size > 50) {
const first = patchCache.keys().next().value;
if (first) patchCache.delete(first);
}
patchCache.set(key, patch.slice());
return patch;
}
// Single-flight lock: serialize inference executions to prevent WebAssembly memory spikes on mobile
if (inFlightInpaint) {
try {
@@ -301,11 +494,14 @@ export async function inpaintCrop(
patchCache.set(key, patch.slice());
return patch;
} catch (err) {
// A model that cannot run is a soft repair, not a broken one — and this one
// line is what keeps the fallback diagnosable instead of invisible, because
// the picture that comes out of it looks like a workable repair.
console.warn('[inpaint] model unavailable, keeping the blurred fill', err);
return null;
console.warn('[inpaint] model unavailable, using fast local inpaint fallback', err);
const patch = fastLocalInpaint(rgba, width, height, hole);
if (patchCache.size > 50) {
const first = patchCache.keys().next().value;
if (first) patchCache.delete(first);
}
patchCache.set(key, patch.slice());
return patch;
}
})();