feat: Add PersonGeneration to ImageConfig for Vertex Gempix

PiperOrigin-RevId: 845492961

Author: matthew29tang

Google.GenAI/Batches.cs

@@ -1186,6 +1186,11 @@ internal JsonNode ImageConfigToMldev(JsonNode fromObject, JsonObject parentObjec
                               Common.GetValueByPath(fromObject, new string[] { "imageSize" }));
       }
 
+      if (!Common.IsZero(Common.GetValueByPath(fromObject, new string[] { "personGeneration" }))) {
+        throw new NotSupportedException(
+            "personGeneration parameter is not supported in Gemini API.");
+      }
+
       if (!Common.IsZero(Common.GetValueByPath(fromObject, new string[] { "outputMimeType" }))) {
         throw new NotSupportedException("outputMimeType parameter is not supported in Gemini API.");
       }

Google.GenAI/Models.cs

@@ -2545,6 +2545,11 @@ internal JsonNode ImageConfigToMldev(JsonNode fromObject, JsonObject parentObjec
                               Common.GetValueByPath(fromObject, new string[] { "imageSize" }));
       }
 
+      if (!Common.IsZero(Common.GetValueByPath(fromObject, new string[] { "personGeneration" }))) {
+        throw new NotSupportedException(
+            "personGeneration parameter is not supported in Gemini API.");
+      }
+
       if (!Common.IsZero(Common.GetValueByPath(fromObject, new string[] { "outputMimeType" }))) {
         throw new NotSupportedException("outputMimeType parameter is not supported in Gemini API.");
       }
@@ -2571,6 +2576,12 @@ internal JsonNode ImageConfigToVertex(JsonNode fromObject, JsonObject parentObje
                               Common.GetValueByPath(fromObject, new string[] { "imageSize" }));
       }
 
+      if (Common.GetValueByPath(fromObject, new string[] { "personGeneration" }) != null) {
+        Common.SetValueByPath(
+            toObject, new string[] { "personGeneration" },
+            Common.GetValueByPath(fromObject, new string[] { "personGeneration" }));
+      }
+
       if (Common.GetValueByPath(fromObject, new string[] { "outputMimeType" }) != null) {
         Common.SetValueByPath(toObject, new string[] { "imageOutputOptions", "mimeType" },
                               Common.GetValueByPath(fromObject, new string[] { "outputMimeType" }));

Google.GenAI/types/ImageConfig.cs

@@ -46,6 +46,16 @@ public string
             get; set;
           }
 
+    /// <summary>
+    /// Controls the generation of people. Supported values are: ALLOW_ALL, ALLOW_ADULT, ALLOW_NONE.
+    /// </summary>
+    [JsonPropertyName("personGeneration")]
+    [JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
+    public string
+        ? PersonGeneration {
+            get; set;
+          }
+
     /// <summary>
     /// MIME type of the generated image. This field is not supported in Gemini API.
     /// </summary>