Improve preview in image generation of Gemini

Fix issue in Bing Image Decorator

g4f/Provider/create_images.py

@@ -87,7 +87,7 @@ class CreateImagesProvider(BaseProvider):
         messages.insert(0, {"role": "system", "content": self.system_message})
         buffer = ""
         for chunk in self.provider.create_completion(model, messages, stream, **kwargs):
-            if buffer or "<" in chunk:
+            if isinstance(chunk, str) and buffer or "<" in chunk:
                 buffer += chunk
                 if ">" in buffer:
                     match = re.search(r'<img data-prompt="(.*?)">', buffer)

g4f/Provider/needs_auth/Gemini.py

@@ -142,13 +142,15 @@ class Gemini(AsyncGeneratorProvider):
                 if image_prompt:
                     images = [image[0][3][3] for image in response_part[4][0][12][7][0]]
                     resolved_images = []
+                    preview = []
                     for image in images:
                         async with session.get(image, allow_redirects=False) as fetch:
                             image = fetch.headers["location"]
                         async with session.get(image, allow_redirects=False) as fetch:
                             image = fetch.headers["location"]
                         resolved_images.append(image)
-                    yield ImageResponse(resolved_images, image_prompt, {"orginal_links": images})
+                        preview.append(image.replace('=s512', '=s200'))
+                    yield ImageResponse(resolved_images, image_prompt, {"orginal_links": images, "preview": preview})
 
     def build_request(
         prompt: str,

g4f/image.py

@@ -187,7 +187,7 @@ def to_base64_jpg(image: Image, compression_rate: float) -> str:
     image.save(output_buffer, format="JPEG", quality=int(compression_rate * 100))
     return base64.b64encode(output_buffer.getvalue()).decode()
 
-def format_images_markdown(images, alt: str, preview: str = None) -> str:
+def format_images_markdown(images: Union[str, list], alt: str, preview: Union[str, list] = None) -> str:
     """
     Formats the given images as a markdown string.
 
@@ -202,9 +202,10 @@ def format_images_markdown(images, alt: str, preview: str = None) -> str:
     if isinstance(images, str):
         images = f"[![{alt}]({preview.replace('{image}', images) if preview else images})]({images})"
     else:
+        if not isinstance(preview, list):
+            preview = [preview.replace('{image}', image) if preview else image for image in images]
         images = [
-            f"[![#{idx+1} {alt}]({preview.replace('{image}', image) if preview else image})]({image})"
-            for idx, image in enumerate(images)
+            f"[![#{idx+1} {alt}]({preview[idx]})]({image})" for idx, image in enumerate(images)
         ]
         images = "\n".join(images)
     start_flag = "<!-- generated images start -->\n"