feat: expose generic image background option

extensions/fal/image-generation-provider.test.ts

@@ -76,6 +76,7 @@ describe("fal image-generation provider", () => {
       cfg: {},
       count: 2,
       size: "1536x1024",
+      outputFormat: "jpeg",
     });
 
     expectFalJsonPost({
@@ -85,7 +86,7 @@ describe("fal image-generation provider", () => {
         prompt: "draw a cat",
         image_size: { width: 1536, height: 1024 },
         num_images: 2,
-        output_format: "png",
+        output_format: "jpeg",
       },
     });
     expect(fetchWithSsrFGuardMock).toHaveBeenNthCalledWith(

extensions/fal/image-generation-provider.ts

@@ -25,6 +25,7 @@ const DEFAULT_FAL_BASE_URL = "https://fal.run";
 const DEFAULT_FAL_IMAGE_MODEL = "fal-ai/flux/dev";
 const DEFAULT_FAL_EDIT_SUBPATH = "image-to-image";
 const DEFAULT_OUTPUT_FORMAT = "png";
+const FAL_OUTPUT_FORMATS = ["png", "jpeg"] as const;
 const FAL_SUPPORTED_SIZES = [
   "1024x1024",
   "1024x1536",
@@ -292,6 +293,9 @@ export function buildFalImageGenerationProvider(): ImageGenerationProvider {
         aspectRatios: [...FAL_SUPPORTED_ASPECT_RATIOS],
         resolutions: ["1K", "2K", "4K"],
       },
+      output: {
+        formats: [...FAL_OUTPUT_FORMATS],
+      },
     },
     async generateImage(req) {
       const auth = await resolveApiKeyForProvider({
@@ -333,7 +337,7 @@ export function buildFalImageGenerationProvider(): ImageGenerationProvider {
       const requestBody: Record<string, unknown> = {
         prompt: req.prompt,
         num_images: req.count ?? 1,
-        output_format: DEFAULT_OUTPUT_FORMAT,
+        output_format: req.outputFormat ?? DEFAULT_OUTPUT_FORMAT,
       };
       if (imageSize !== undefined) {
         requestBody.image_size = imageSize;