app.py

import math
import random
import os
import json
import time
import argparse
import torch
import numpy as np
from torchvision import transforms

from models.region_diffusion import RegionDiffusion
from utils.attention_utils import get_token_maps
from utils.richtext_utils import seed_everything, parse_json, get_region_diffusion_input,\
    get_attention_control_input, get_gradient_guidance_input


import gradio as gr
from PIL import Image, ImageOps


help_text = """
If you are getting an error or not getting what you want, here are some possible reasons and suggestions:
1. Error: the model only supports formatting the complete tooken. An error occurs when part of the token is formatted.
2. Sometimes the token map does not accurately capture the region of the formatted tokens. You may play with selecting more / less tokens to increase / decrease the area covered by the token maps.
3. If you use font color and get completely corrupted results, you may consider decrease the color weight lambda.
4.  Use a different seed.
"""


def main():
    device = torch.device('cuda' if torch.cuda.is_available() else 'cpu')
    model = RegionDiffusion(device)

    def generate(
        text_input: str,
        negative_text: str,
        height: int,
        width: int,
        seed: int,
        steps: int,
        guidance_weight: float,
        color_guidance_weight: float,
    ):
        run_dir = 'results/'
        # Load region diffusion model.
        steps = 41 if not steps else steps
        guidance_weight = 8.5 if not guidance_weight else guidance_weight

        # parse json to span attributes
        base_text_prompt, style_text_prompts, footnote_text_prompts, footnote_target_tokens,\
            color_text_prompts, color_names, color_rgbs, size_text_prompts_and_sizes, use_grad_guidance = parse_json(
                json.loads(text_input), device)

        # create control input for region diffusion
        region_text_prompts, region_target_token_ids, base_tokens = get_region_diffusion_input(
            model, base_text_prompt, style_text_prompts, footnote_text_prompts,
            footnote_target_tokens, color_text_prompts, color_names)

        # create control input for cross attention
        text_format_dict = get_attention_control_input(
            model, base_tokens, size_text_prompts_and_sizes)

        # create control input for region guidance
        text_format_dict, color_target_token_ids = get_gradient_guidance_input(
            model, base_tokens, color_text_prompts, color_rgbs, text_format_dict, color_guidance_weight=color_guidance_weight)

        seed_everything(seed)

        # get token maps from plain text to image generation.
        begin_time = time.time()
        if model.attention_maps is None:
            model.register_evaluation_hooks()
        else:
            model.reset_attention_maps()
        plain_img = model.produce_attn_maps([base_text_prompt], [negative_text],
                                            height=height, width=width, num_inference_steps=steps,
                                            guidance_scale=guidance_weight)
        print('time lapses to get attention maps: %.4f' % (time.time()-begin_time))
        color_obj_masks, _ = get_token_maps(
            model.attention_maps, run_dir, width//8, height//8, color_target_token_ids, seed)
        model.masks, token_maps = get_token_maps(
            model.attention_maps, run_dir, width//8, height//8, region_target_token_ids, seed, base_tokens)
        color_obj_masks = [transforms.functional.resize(color_obj_mask, (height, width),
                                                        interpolation=transforms.InterpolationMode.BICUBIC,
                                                        antialias=True)
                        for color_obj_mask in color_obj_masks]
        text_format_dict['color_obj_atten'] = color_obj_masks
        model.remove_evaluation_hooks()

        # generate image from rich text
        begin_time = time.time()
        seed_everything(seed)
        rich_img = model.prompt_to_img(region_text_prompts, [negative_text],
                                    height=height, width=width, num_inference_steps=steps,
                                    guidance_scale=guidance_weight, use_grad_guidance=use_grad_guidance,
                                    text_format_dict=text_format_dict)
        print('time lapses to generate image from rich text: %.4f' %
            (time.time()-begin_time))
        cat_img = np.concatenate([plain_img[0], rich_img[0]], 1)
        return [cat_img, token_maps]

    with gr.Blocks() as demo:
        gr.HTML("""<h1 style="font-weight: 900; margin-bottom: 7px;">Expressive Text-to-Image Generation with Rich Text</h1>
                   <p> Visit our <a href="https://rich-text-to-image.github.io/rich-text-to-json.html">rich-text-to-json interface</a> to generate rich-text JSON input.<p/>""")
        with gr.Row():
            with gr.Column():
                text_input = gr.Textbox(
                    label='Rich-text JSON Input',
                    max_lines=1,
                    placeholder='Example: \'{"ops":[{"insert":"a Gothic "},{"attributes":{"color":"#b26b00"},"insert":"church"},{"insert":" in a the sunset with a beautiful landscape in the background.\n"}]}\'')
                negative_prompt = gr.Textbox(
                    label='Negative Prompt',
                    max_lines=1,
                    placeholder='')
                seed = gr.Slider(label='Seed',
                                 minimum=0,
                                 maximum=100000,
                                 step=1,
                                 value=6)
                color_guidance_weight = gr.Slider(label='Color weight lambda',
                                                  minimum=0,
                                                  maximum=2,
                                                  step=0.1,
                                                  value=0.5)
                with gr.Accordion('Other Parameters', open=False):
                    steps = gr.Slider(label='Number of Steps',
                                          minimum=0,
                                          maximum=500,
                                          step=1,
                                          value=41)
                    guidance_weight = gr.Slider(label='CFG weight',
                                               minimum=0,
                                               maximum=50,
                                               step=0.1,
                                               value=8.5)
                    width = gr.Dropdown(choices=[512, 768, 896],
                                    value=512,
                                    label='Width',
                                    visible=True)
                    height = gr.Dropdown(choices=[512, 768, 896],
                                    value=512,
                                    label='height',
                                    visible=True)
                    
                with gr.Row():
                    with gr.Column(scale=1, min_width=100):
                        generate_button = gr.Button("Generate")

            with gr.Column():
                result = gr.Image(label='Result')
                token_map = gr.Image(label='TokenMap')

        with gr.Row():
            gr.Markdown(help_text)

        with gr.Row():
            examples = [
                [
                    '{"ops":[{"insert":"a "},{"attributes":{"font":"slabo"},"insert":"night sky filled with stars"},{"insert":" above a "},{"attributes":{"font":"roboto"},"insert":"turbulent sea with giant waves"}]}',
                    '',
                    512,
                    512,
                    6,
                    1,
                ],
                [
                    '{"ops":[{"attributes":{"link":"the awe-inspiring sky and ocean in the style of J.M.W. Turner"},"insert":"the awe-inspiring sky and sea"},{"insert":" by "},{"attributes":{"font":"mirza"},"insert":"a coast with flowers and grasses in spring"}]}',
                    '',
                    512,
                    512,
                    9,
                    1,
                ],
                [
                    '{"ops":[{"insert":"a Gothic "},{"attributes":{"color":"#b26b00"},"insert":"church"},{"insert":" in a the sunset with a beautiful landscape in the background."}]}',
                    '',
                    512,
                    512,
                    6,
                    1,
                ],
                [
                    '{"ops": [{"insert": "A pizza with "}, {"attributes": {"size": "50px"}, "insert": "pineapples"}, {"insert": ", pepperonis, and mushrooms on the top, 4k, photorealistic"}]}',
                    'blurry, art, painting, rendering, drawing, sketch, ugly, duplicate, morbid, mutilated, mutated, deformed, disfigured low quality, worst quality',
                    768,
                    896,
                    6,
                    1,
                ],
                [
                    '{"ops":[{"insert":"a "},{"attributes":{"font":"mirza"},"insert":"beautiful garden"},{"insert":" with a "},{"attributes":{"font":"roboto"},"insert":"snow mountain in the background"},{"insert":""}]}',
                    '',
                    512,
                    512,
                    3,
                    1,
                ],
                [
                    '{"ops":[{"insert":"A close-up 4k dslr photo of a "},{"attributes":{"link":"A cat wearing sunglasses and a bandana around its neck."},"insert":"cat"},{"insert":" riding a scooter. Palm trees in the background."}]}',
                    '',
                    512,
                    512,
                    6,
                    1,
                ],
            ]
            gr.Examples(examples=examples,
                        inputs=[
                            text_input,
                            negative_prompt,
                            height,
                            width,
                            seed,
                            color_guidance_weight,
                        ],
                        outputs=[
                            result,
                            token_map,
                        ],
                        fn=generate,
                        # cache_examples=True,
                        examples_per_page=20)

        generate_button.click(
            fn=generate,
            inputs=[
                text_input,
                negative_prompt,
                height,
                width,
                seed,
                steps,
                guidance_weight,
                color_guidance_weight,
            ],
            outputs=[result, token_map],
        )

    demo.queue(concurrency_count=1)
    demo.launch(share=False)


if __name__ == "__main__":
    main()