Wire Qwen 2.1 as Generate-only engine with 25/1 sampler defaults.

Co-authored-by: Cursor <cursoragent@cursor.com>

server/utils/studio2/runner.ts

@@ -8,8 +8,10 @@ import { queueSeeds } from '~/shared/studio2/seed.mjs';
 import { readFileSync, writeFileSync, mkdirSync, existsSync, unlinkSync } from 'node:fs';
 import { join } from 'node:path';
 import template from '../../assets/studio2_minimax_native.json';
+import qwen21Template from '../../assets/studio2_qwen21_t2i.json';
 import { nativeVideoGraph, attachHeroReference, applyResolvedImageSize } from '~/shared/studio2/graphs.mjs';
 import { compilePrompt, scopedFile } from '~/shared/studio2/contracts.mjs';
+import { resolveQwen21Size } from '~/shared/studio2/input.mjs';
 import { createJob, restoreJob, getJob, emitJob, type Job } from '../jobs';
 import { markStudioLive, onLiveVideoSettled, type StudioJob } from '../studioQueue';
 import { readRecord, saveRecord, studio2Root, records } from './store';
@@ -126,6 +128,28 @@ async function prepareGraph(r: any) {
             r.graphId = 'studio2_minimax_native.json';
         }
     }
+    else if (q.engine === 'qwen21') {
+        if (q.mode !== 'generate')
+            throw new Error('Qwen 2.1 is T2I in this build.');
+        const size = resolveQwen21Size(s.aspect);
+        s.width = size.width;
+        s.height = size.height;
+        graph = structuredClone(qwen21Template);
+        graph['9'].inputs.text = q.compiledPrompt;
+        graph['10'].inputs.text = stylePrompt(q.imageStyles, true);
+        graph['14'].inputs.width = size.width;
+        graph['14'].inputs.height = size.height;
+        graph['15'].inputs.seed = s.seed;
+        graph['15'].inputs.steps = s.steps || 25;
+        graph['15'].inputs.cfg = s.cfg ?? 1;
+        graph['15'].inputs.sampler_name = 'euler';
+        graph['15'].inputs.scheduler = 'simple';
+        graph['21'].inputs.filename_prefix = prefix + '/image';
+        r.sampleLatent = 'empty latent';
+        r.sampleDenoise = null;
+        r.heroReferenceAttached = false;
+        r.graphId = 'studio2_qwen21_t2i.json';
+    }
     else {
         const mode = identityPlan?.mode ?? (q.mode === 'iterate' ? (a ? 'edit' : 'generate') : q.mode);
         const found = q.engine === 'krea' ? await resolveKreaGenerateAssets() : null;

server/utils/studio2/size.ts

@@ -21,5 +21,5 @@ export async function resolveRequestSize(owner: string, request: any) {
     }
   }
   if (video && request.startClipId && !dimensions?.width) throw new Error('Cannot measure the previous clip.')
-  Object.assign(request.settings,resolveSize(request.settings.aspect,dimensions))
+  Object.assign(request.settings,resolveSize(request.settings.aspect,dimensions,undefined,request.engine))
 }