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| import streamlit as st
from streamlit_drawable_canvas import st_canvas
import numpy as np
import cv2
from PIL import Image
import io
import fitz
import os
import pandas as pd
st.set_page_config(
layout="wide",
)
dict_pdf = {
"測量工程抽查表": "6-27.pdf",
"土方工程抽查表": "6-29.pdf",
"模板工程抽查表": "6-30.pdf",
"鋼筋工程抽查表": "6-31.pdf",
"其他": ""
}
st.sidebar.title("✍ PDF 簽名工具")
page = st.sidebar.selectbox("選擇頁面", ["手繪簽名", "查看表單"])
if page == "手繪簽名":
save_folder = "saved_pdfs"
os.makedirs(save_folder, exist_ok=True)
form_selection = st.sidebar.selectbox("選擇抽查表", list(dict_pdf.keys()))
file_name = "./pdfs/"+dict_pdf[form_selection]
if form_selection == "其他":
uploaded_file = st.file_uploader("上傳 PDF", type=["pdf"])
else:
with open(file_name, "rb") as f:
uploaded_file = f.read()
if uploaded_file:
if form_selection == "其他":
pdf_bytes = uploaded_file.read()
else:
pdf_bytes = uploaded_file
document = fitz.open("pdf", pdf_bytes)
page = document.load_page(0)
pix = page.get_pixmap(matrix=fitz.Matrix(2.0, 2.0))
original_width, original_height = pix.width, pix.height
background_image = Image.frombytes("RGB", [pix.width, pix.height], pix.samples)
canvas_result = st_canvas(
fill_color="rgba(0, 0, 0, 0)",
stroke_width=3,
stroke_color="black",
background_image=background_image,
height=pix.height,
width=pix.width,
drawing_mode="freedraw",
key="canvas",
)
if canvas_result.image_data is not None:
signature_data = canvas_result.image_data
signature = cv2.cvtColor(signature_data, cv2.COLOR_RGBA2BGRA)
signed_images = []
y_offset, x_offset = 0,0
for page_num in range(len(document)):
page = document.load_page(page_num)
pix = page.get_pixmap(matrix=fitz.Matrix(2.0, 2.0))
image = Image.frombytes("RGB", [pix.width, pix.height], pix.samples)
open_cv_image = np.array(image)
open_cv_image = cv2.cvtColor(open_cv_image, cv2.COLOR_RGB2BGRA)
sig_h, sig_w, _ = signature.shape
img_h, img_w, _ = open_cv_image.shape
adjusted_y_offset = int((y_offset / original_height) * img_h)
adjusted_x_offset = int((x_offset / original_width) * img_w)
if adjusted_y_offset + sig_h > img_h:
sig_h = img_h - adjusted_y_offset
if adjusted_x_offset + sig_w > img_w:
sig_w = img_w - adjusted_x_offset
resized_signature = cv2.resize(signature, (sig_w, sig_h))
for c in range(0, 3):
open_cv_image[adjusted_y_offset:adjusted_y_offset+sig_h, adjusted_x_offset:adjusted_x_offset+sig_w, c] = \
resized_signature[:, :, c] * (resized_signature[:, :, 3] / 255.0) + \
open_cv_image[adjusted_y_offset:adjusted_y_offset+sig_h, adjusted_x_offset:adjusted_x_offset+sig_w, c] * (1.0 - resized_signature[:, :, 3] / 255.0)
signed_image = Image.fromarray(cv2.cvtColor(open_cv_image, cv2.COLOR_BGRA2RGBA))
signed_images.append(signed_image)
pdf_output = io.BytesIO()
signed_images[0].save(pdf_output, "PDF", resolution=100.0, save_all=True, append_images=signed_images[1:])
pdf_output.seek(0)
if st.button("儲存", type='primary'):
base_file_name = form_selection if form_selection != "其他" else "custom"
existing_files = [f for f in os.listdir(save_folder) if f.startswith(base_file_name)]
file_count = len(existing_files) + 1
output_file_name = f"{base_file_name}_{file_count}.pdf"
save_path = os.path.join(save_folder, output_file_name)
with open(save_path, "wb") as f:
f.write(pdf_output.getbuffer())
st.success(f"已將簽名後的 PDF 保存到: {save_path}")
elif page == "查看表單":
save_folder = "saved_pdfs"
os.makedirs(save_folder, exist_ok=True)
saved_forms = os.listdir(save_folder)
classified_forms = {}
for form in saved_forms:
form_type = form.rsplit('_', 1)[0]
if form_type not in classified_forms:
classified_forms[form_type] = []
classified_forms[form_type].append(form)
df = pd.DataFrame(
[(key, form) for key, forms in classified_forms.items() for form in forms],
columns=["表單類型", "文件名"]
)
selected_forms = st.multiselect("選擇要顯示的表單", df["文件名"])
if selected_forms:
for form in selected_forms:
form_path = os.path.join(save_folder, form)
st.markdown(f"#### {form}")
pdf_doc = fitz.open(form_path)
for page_num in range(len(pdf_doc)):
page = pdf_doc.load_page(page_num)
pix = page.get_pixmap(matrix=fitz.Matrix(2.0, 2.0))
img = Image.frombytes("RGB", [pix.width, pix.height], pix.samples)
st.image(img, caption=f"第 {page_num + 1} 頁")
else:
st.write("目前沒有已保存的表單。")
|