Init

app.py

@@ -0,0 +1,101 @@
+import io
+
+from flask import Flask, request, send_file
+from PIL import Image, ImageDraw, ImageFont
+import qrcode
+
+default_font = "atkinson-hyperlegible.ttf"
+
+def get_wrapped_text(text: str, font: ImageFont.ImageFont, line_length: int):
+    lines = ['']
+    for word in text.split():
+        line = f'{lines[-1]} {word}'.strip()
+        if font.getlength(line) <= line_length:
+            lines[-1] = line
+        else:
+            lines.append(word)
+    return '\n'.join(lines)
+
+def draw_fitted_text_h(draw, pos, text: str, font_size: int, max_width: int, max_height: int):
+    bbox_h = float("inf")
+    font = ImageFont.truetype(default_font, font_size)
+    text_wrapped = text
+
+    while bbox_h >= max_height and font_size > 0: 
+        font = font.font_variant(size=font_size)
+        font_size -= 1
+
+        text_wrapped = get_wrapped_text(text, font, line_length=max_width).strip('\n')
+        bbox_h = draw.textbbox((0, 0), text_wrapped, font=font)[3]
+
+    draw.text(pos, text_wrapped, 0, font=font)
+    return draw.textbbox((0, 0), text_wrapped, font=font)[3]
+
+def draw_fitted_text_w(draw, pos, text: str, font_size: int, max_width: int):
+    bbox_w = float("inf")
+    font = ImageFont.truetype(default_font, font_size)
+
+    while bbox_w >= max_width and font_size > 0: 
+        font = font.font_variant(size=font_size)
+        font_size -= 1
+
+        bbox_w = font.getlength(text)
+
+    draw.text(pos, text, 0, font=font)
+    return draw.textbbox((0, 0), text, font=font)[3]
+
+
+app = Flask(__name__)
+
+@app.route('/', methods=['GET'])
+def call_handler():
+    height = int(request.args.get('Height', 500))
+    width = int(request.args.get('Width', 300))
+    margin = int(request.args.get('Margin', 10))
+    padding = int(request.args.get('ComponentPadding', 10))
+    dpi = int(float(request.args.get('Dpi', 300)))
+
+    useable_width = width - (2 * margin)
+    useable_height = height - (2 * margin)
+    qr_max_size = min(useable_width, useable_height)
+
+    qr_size = min(qr_max_size, int(request.args.get('QrSize', qr_max_size)))
+    url = request.args.get('URL')
+
+    desc = request.args.get('DescriptionText', '').split('\n')[0]
+    desc_size = float(request.args.get('DescriptionFontSize', 24))
+    title = request.args.get('TitleText')
+    title_size = float(request.args.get('TitleFontSize', 24))
+
+    l_type_size = min(desc_size, title_size)
+    l_text_size = max(desc_size, title_size)
+
+    if desc == 'Homebox Location':
+        l_type = desc
+        l_text = title
+    else:
+        l_type = 'Homebox ' + title
+        l_text = desc
+
+
+    img = Image.new('1', (width, height), 1)
+    y = margin
+
+    qr_img = qrcode.make(url, border=0)
+    qr_img = qr_img.resize((qr_size, qr_size), resample=Image.NEAREST)
+    img.paste(qr_img, (margin, y))
+    y += qr_size + padding
+
+    draw = ImageDraw.Draw(img)
+
+    used_h = draw_fitted_text_w(draw, (margin, y), l_type, l_type_size, useable_width)
+    y += used_h + padding
+
+    draw_fitted_text_h(draw, (margin, y), l_text, l_text_size, useable_width, useable_height - y)
+
+
+    img_io = io.BytesIO()
+    img.save(img_io, 'PNG', quality=100, dpi=(dpi, dpi))
+    img_io.seek(0)
+
+    return send_file(img_io, mimetype='image/png')