add image_size_coef to change image size

src/constructor.py

@@ -27,6 +27,7 @@ def generate_presentation(
     font:Font, 
     output_dir: str,
     num_inference_steps: int,
+    image_size_coef: float,
 ) -> Presentation:
     """
     Generate a PowerPoint presentation based on a description using language and image models.
@@ -78,6 +79,7 @@ def generate_presentation(
             image_width, image_height = random.choice(
                 [(768, 1344), (1024, 1024)]
             )
+            image_width, image_height = image_size_coef * image_width, image_size_coef * image_height
             caption_prompt = llm_generate_image_prompt(
                 llm_generate, 
                 description, 
@@ -101,7 +103,8 @@ def generate_presentation(
         picture_paths.append(picture_path)
 
         if picture_path is None:
-            background_width, background_height = 1344, 768
+            # background_width, background_height = 1344, 768
+            background_width, background_height = image_size_coef * 1344, image_size_coef * 768
             background_prompt = llm_generate_background_prompt(
                 llm_generate, 
                 description,