53 lines
1.8 KiB
Python
53 lines
1.8 KiB
Python
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"""Export helpers for packaging assets."""
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from __future__ import annotations
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from io import BytesIO
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from PIL import Image, ImageDraw
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from reportlab.lib.pagesizes import A4
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from reportlab.lib.utils import ImageReader
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from reportlab.pdfgen import canvas
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try:
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import cairosvg # type: ignore
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except Exception: # pragma: no cover
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cairosvg = None
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def svg_to_png_bytes(svg_content: str, width: int = 1400, height: int = 1000) -> bytes:
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"""Convert SVG content to PNG bytes with a Pillow fallback."""
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if cairosvg is not None:
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return cairosvg.svg2png(bytestring=svg_content.encode("utf-8"))
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# Fallback when cairosvg is unavailable: branded placeholder raster.
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img = Image.new("RGB", (width, height), "#0b1220")
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draw = ImageDraw.Draw(img)
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draw.rectangle((24, 24, width - 24, height - 24), outline="#00e5ff", width=3)
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draw.text((48, 56), "Foodlinkk Packaging Preview", fill="#e2e8f0")
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draw.text((48, 92), "Install cairosvg for full SVG rendering.", fill="#94a3b8")
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stream = BytesIO()
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img.save(stream, format="PNG")
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return stream.getvalue()
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def svg_to_pdf_bytes(svg_content: str) -> bytes:
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"""Render SVG in a PDF by first rasterizing to PNG."""
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png_data = svg_to_png_bytes(svg_content, width=1800, height=1300)
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png_image = Image.open(BytesIO(png_data)).convert("RGB")
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output = BytesIO()
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pdf = canvas.Canvas(output, pagesize=A4)
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page_w, page_h = A4
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img_w, img_h = png_image.size
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scale = min((page_w - 64) / img_w, (page_h - 64) / img_h)
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draw_w = img_w * scale
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draw_h = img_h * scale
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x = (page_w - draw_w) / 2
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y = (page_h - draw_h) / 2
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pdf.drawImage(ImageReader(png_image), x, y, width=draw_w, height=draw_h, preserveAspectRatio=True, mask="auto")
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pdf.showPage()
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pdf.save()
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return output.getvalue()
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