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# app.py
from PIL import Image, ImageDraw
import gradio as gr
MAX_SIDE = 900
def fit_canvas(img):
if img is None:
return MAX_SIDE, MAX_SIDE
w, h = img.size
scale = MAX_SIDE / max(w, h)
return int(w * scale), int(h * scale)
def snap_last_stroke(val):
"""Convert any roughly-dragged stroke into a filled rectangle of its color."""
if not val or not val["layers"]:
return val
last = val["layers"][-1]
box = last.getbbox()
if box:
mx, my = (box[0]+box[2])//2, (box[1]+box[3])//2
try:
color = last.getpixel((mx, my))
except:
color = (255,255,255,255)
rect = Image.new("RGBA", last.size, (0,0,0,0))
ImageDraw.Draw(rect).rectangle(box, fill=color)
val["layers"][-1] = rect
base = val["background"].copy()
for layer in val["layers"]:
base.alpha_composite(layer)
val["composite"] = base
# collapse layers so editor.value is always the merged image
val["background"], val["layers"] = base, []
return val
def load_image(img):
return gr.update(value=img, canvas_size=fit_canvas(img))
def update_brush(color_hex):
return gr.update(
brush=gr.Brush(
colors=[color_hex],
default_color=color_hex,
default_size=80,
color_mode="fixed"
)
)
with gr.Blocks(css=".gradio-container { max-width:1200px; margin:auto; }") as demo:
with gr.Row():
color_picker = gr.ColorPicker("#FFFFFF", label="Brush Color")
uploader = gr.Image(type="pil", label="Upload Image")
editor = gr.ImageEditor(
type="pil", # emit PIL.Images so the download icon works
brush=gr.Brush(colors=["#FFFFFF"], default_color="#FFFFFF", default_size=80, color_mode="fixed"),
eraser=gr.Eraser(default_size=80),
layers=False,
canvas_size=(MAX_SIDE, MAX_SIDE),
)
# snapping callback
editor.apply(snap_last_stroke, inputs=editor, outputs=editor)
# wire color picker & uploader
color_picker.change(update_brush, color_picker, editor)
uploader.change(load_image, uploader, editor)
demo.launch(share=True)
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