113 lines
3.5 KiB
Python
113 lines
3.5 KiB
Python
import re
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from io import BytesIO
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import aiohttp
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import cv2
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import numpy as np
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from discord import File
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from discord.ext import commands
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import jarvis
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from jarvis.utils import build_embed, convert_bytesize, unconvert_bytesize
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from jarvis.utils.field import Field
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class ImageCog(commands.Cog):
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"""
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Image processing functions for J.A.R.V.I.S.
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May be categorized under util later
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"""
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def __init__(self, bot):
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self.bot = bot
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self._session = aiohttp.ClientSession()
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self.tgt_match = re.compile(
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r"([0-9]*\.?[0-9]*?) ?([KMGTP]?B)", re.IGNORECASE
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)
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async def _resize(self, ctx, target: str, url: str = None):
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if not target:
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await ctx.send("Missing target size, i.e. 200KB.")
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return
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tgt = self.tgt_match.match(target)
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if not tgt:
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await ctx.send(
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"Invalid target format ({}).".format(target)
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+ " Expected format like 200KB"
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)
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return
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tgt_size = unconvert_bytesize(float(tgt.groups()[0]), tgt.groups()[1])
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if tgt_size > unconvert_bytesize(8, "MB"):
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await ctx.send(
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"Target too large to send. Please make target < 8MB"
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)
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return
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file = None
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filename = None
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if (
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ctx.message.attachments is not None
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and len(ctx.message.attachments) > 0
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):
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file = await ctx.message.attachments[0].read()
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filename = ctx.message.attachments[0].filename
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elif url is not None:
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async with self._session.get(url) as resp:
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if resp.status == 200:
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file = await resp.read()
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filename = url.split("/")[-1]
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else:
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ctx.send("Missing file as either attachment or URL.")
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size = len(file)
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if size <= tgt_size:
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await ctx.send("Image already meets target.")
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return
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ratio = max(tgt_size / size - 0.02, 0.50)
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accuracy = 0.0
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# TODO: Optimize to not run multiple times
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while len(file) > tgt_size or (
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len(file) <= tgt_size and accuracy < 0.65
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):
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old_file = file
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buffer = np.frombuffer(file, dtype=np.uint8)
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img = cv2.imdecode(buffer, flags=-1)
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width = int(img.shape[1] * ratio)
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height = int(img.shape[0] * ratio)
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new_img = cv2.resize(img, (width, height))
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file = cv2.imencode(".png", new_img)[1].tobytes()
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accuracy = (len(file) / tgt_size) * 100
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if accuracy <= 0.50:
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file = old_file
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ratio += 0.1
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else:
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ratio = max(tgt_size / len(file) - 0.02, 0.65)
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bufio = BytesIO(file)
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accuracy = (len(file) / tgt_size) * 100
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fields = [
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Field("Original Size", convert_bytesize(size), False),
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Field("New Size", convert_bytesize(len(file)), False),
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Field("Accuracy", f"{accuracy:.02f}%", False),
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]
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embed = build_embed(title=filename, description="", fields=fields)
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embed.set_image(url=f"attachment://resized.png")
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await ctx.send(
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embed=embed,
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file=File(bufio, filename="resized.png"),
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)
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@commands.command(name="resize", help="Resize an image")
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async def _resize_pref(self, ctx, target: str, url: str = None):
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await self._resize(ctx, target, url)
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def setup(bot):
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bot.add_cog(ImageCog(bot))
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