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feature focus on 3d viewer, add copy/paste

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This commit is contained in:
matei jordache
2026-03-26 21:25:35 -07:00
parent de0b49acc5
commit 30671a5362
24 changed files with 1680 additions and 320 deletions
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66
frontend/tests/pngMetadata.test.mjs
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@@ -9,63 +9,6 @@ function makePngBlob() {
return new Blob([Buffer.from(PNG_BASE64, 'base64')], { type: 'image/png' });
}
function crc32(bytes) {
const table = new Uint32Array(256);
for (let i = 0; i < 256; i++) {
let c = i;
for (let j = 0; j < 8; j++) {
c = (c & 1) ? (0xEDB88320 ^ (c >>> 1)) : (c >>> 1);
}
table[i] = c;
}
let crc = 0xFFFFFFFF;
for (let i = 0; i < bytes.length; i++) {
crc = table[(crc ^ bytes[i]) & 0xFF] ^ (crc >>> 8);
}
return (crc ^ 0xFFFFFFFF) >>> 0;
}
function buildChunk(type, payload) {
const typeBytes = new TextEncoder().encode(type);
const crcInput = new Uint8Array(4 + payload.length);
crcInput.set(typeBytes, 0);
crcInput.set(payload, 4);
const chunk = new Uint8Array(12 + payload.length);
const view = new DataView(chunk.buffer);
view.setUint32(0, payload.length);
chunk.set(typeBytes, 4);
chunk.set(payload, 8);
view.setUint32(8 + payload.length, crc32(crcInput));
return chunk;
}
async function insertTextChunk(blob, workflow) {
const png = new Uint8Array(await blob.arrayBuffer());
const encoder = new TextEncoder();
const key = encoder.encode('workflow');
const text = encoder.encode(JSON.stringify(workflow));
const payload = new Uint8Array(key.length + 1 + text.length);
payload.set(key, 0);
payload.set(text, key.length + 1);
const chunk = buildChunk('tEXt', payload);
let pos = 8;
while (pos < png.length) {
const len = new DataView(png.buffer, pos, 4).getUint32(0);
const type = String.fromCharCode(png[pos + 4], png[pos + 5], png[pos + 6], png[pos + 7]);
if (type === 'IEND') break;
pos += 12 + len;
}
const out = new Uint8Array(png.length + chunk.length);
out.set(png.subarray(0, pos), 0);
out.set(chunk, pos);
out.set(png.subarray(pos), pos + chunk.length);
return new Blob([out], { type: 'image/png' });
}
test('embedWorkflow roundtrips workflow data through an iTXt chunk', async () => {
const workflow = {
version: 1,
@@ -88,15 +31,6 @@ test('embedWorkflow roundtrips workflow data through an iTXt chunk', async () =>
assert.match(Buffer.from(bytes).toString('latin1'), /iTXt/);
});
test('extractWorkflow still supports legacy tEXt metadata chunks', async () => {
const workflow = { version: 1, legacy: true, nodes: [], edges: [] };
const legacyBlob = await insertTextChunk(makePngBlob(), workflow);
const extracted = await extractWorkflow(legacyBlob);
assert.deepEqual(extracted, workflow);
});
test('extractWorkflow returns the last workflow chunk when an image is re-saved', async () => {
const first = { version: 1, name: 'old', nodes: [], edges: [] };
const second = { version: 1, name: 'new', nodes: [], edges: [] };