Add Ideogram 4 Scheduler node with preconfigured presets.

comfy_extras/nodes_ideogram4.py

@@ -1,6 +1,7 @@
 """Ideogram 4 sampling helper
 """
 
+import enum
 import math
 
 import torch
@@ -10,6 +11,31 @@
 _LOGSNR_MIN = -15.0
 _LOGSNR_MAX = 18.0
 
+class Ideogram4Enum(enum.Enum):
+    QUALITY = "Quality"
+    DEFAULT = "Default"
+    TURBO = "Turbo"
+
+IDEOGRAM4_PRESET_CONFIGS = {
+  "Quality": {
+    "num_steps": 48,
+    "mu": 0.0,
+    "std": 1.5,
+    "preset_id": "V4_QUALITY_48"
+  },
+  "Default": {
+    "num_steps": 20,
+    "mu": 0.0,
+    "std": 1.75,
+    "preset_id": "V4_DEFAULT_20"
+  },
+  "Turbo": {
+    "num_steps": 12,
+    "mu": 0.5,
+    "std": 1.75,
+    "preset_id": "V4_TURBO_12"
+  }
+}
 
 def _logit_normal_schedule(u, mean, std):
     # Reference time (0=noise..1=clean) via the probit/ndtri quantile.
@@ -54,10 +80,40 @@ def execute(cls, steps, width, height, mu, std) -> io.NodeOutput:
         return io.NodeOutput(ideogram4_sigmas(steps, width, height, mu, std))
 
 
+class Ideogram4SchedulerPreset(Ideogram4Scheduler):
+    @classmethod
+    def define_schema(cls) -> io.Schema:
+        return io.Schema(
+            node_id="Ideogram4SchedulerPreset",
+            display_name="Ideogram 4 Scheduler (Presets)",
+            category="sampling/custom_sampling/schedulers",
+            inputs=[
+                io.Combo.Input("preset", options=[e.value for e in Ideogram4Enum], default=Ideogram4Enum.DEFAULT.value),
+                io.Int.Input("width", default=1024, min=256, max=8192, step=16),
+                io.Int.Input("height", default=1024, min=256, max=8192, step=16),
+            ],
+            outputs=[io.Sigmas.Output()],
+        )
+
+    @classmethod
+    def execute(cls, preset, width, height) -> io.NodeOutput:
+        config = IDEOGRAM4_PRESET_CONFIGS.get(preset)
+        if not config:
+            raise ValueError(f"Invalid preset: {preset}")
+
+        return super().execute(
+            steps=config["num_steps"],
+            width=width,
+            height=height,
+            mu=config["mu"],
+            std=config["std"]
+        )
+
+
 class Ideogram4Extension(ComfyExtension):
     @override
     async def get_node_list(self) -> list[type[io.ComfyNode]]:
-        return [Ideogram4Scheduler]
+        return [Ideogram4Scheduler, Ideogram4SchedulerPreset]
 
 
 async def comfy_entrypoint() -> Ideogram4Extension: