From de00b838c421cef05266a7b09c3e5c824530fa19 Mon Sep 17 00:00:00 2001
From: Jzz1943 <jiangzhongze.jzz@ant-intl.com>
Date: Mon, 6 Jul 2026 14:45:45 +0800
Subject: [PATCH] [diffusion] fix: pass progressive params through image API
 (#30148)

---
 .../runtime/entrypoints/openai/image_api.py       | 15 +++++++++++++++
 .../runtime/entrypoints/openai/protocol.py        |  4 ++++
 2 files changed, 19 insertions(+)

diff --git a/python/sglang/multimodal_gen/runtime/entrypoints/openai/image_api.py b/python/sglang/multimodal_gen/runtime/entrypoints/openai/image_api.py
index ab541e4c0..26f4b97bd 100644
--- a/python/sglang/multimodal_gen/runtime/entrypoints/openai/image_api.py
+++ b/python/sglang/multimodal_gen/runtime/entrypoints/openai/image_api.py
@@ -201,6 +201,21 @@ async def generations(
             perf_dump_path=request.perf_dump_path,
             use_pe=_get_extra_field(request, "use_pe"),
             preset=_get_extra_field(request, "preset"),
+            progressive_mode=(
+                request.progressive_mode
+                if request.progressive_mode is not None
+                else _get_extra_field(request, "progressive_mode")
+            ),
+            progressive_levels=(
+                request.progressive_levels
+                if request.progressive_levels is not None
+                else _get_extra_field(request, "progressive_levels")
+            ),
+            progressive_delta=(
+                request.progressive_delta
+                if request.progressive_delta is not None
+                else _get_extra_field(request, "progressive_delta")
+            ),
         )
         trace_headers = extract_trace_headers(raw_request.headers)
         batch = prepare_request(
diff --git a/python/sglang/multimodal_gen/runtime/entrypoints/openai/protocol.py b/python/sglang/multimodal_gen/runtime/entrypoints/openai/protocol.py
index f3f651149..694a9fdc4 100644
--- a/python/sglang/multimodal_gen/runtime/entrypoints/openai/protocol.py
+++ b/python/sglang/multimodal_gen/runtime/entrypoints/openai/protocol.py
@@ -59,6 +59,10 @@ class ImageGenerationsRequest(BaseModel):
     diffusers_kwargs: Optional[Dict[str, Any]] = None  # kwargs for diffusers backend
     # Performance profiling
     perf_dump_path: Optional[str] = None
+    # Progressive resolution generation
+    progressive_mode: Optional[str] = None
+    progressive_levels: Optional[int] = None
+    progressive_delta: Optional[float] = None
 
 
 # Video API protocol models