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Latex image too big on tkinter using sympy - 4096 - Nov-03-2020
I'm trying to create small images of mathematical forumulas using tkinter, sympy, and latex. The images generated are way too big and I don't know how to reduce the size. When I searched online, people said that using
\documentclass{standalone} will make the generated image the minimum size sufficient to fit the contents, but that hasn't happened when I tried it. The images generated seem to be 600 by 800 points no matter what I try. I've tried various things like adding the option [convert={size=25x50}] to the document class and \usepackage[active,tightpage,textmath]{preview} (per this page https://tex.stackexchange.com/questions/146511/using-usepackageactive-tightpagepreview-does-not-generate-any-page ) and \documentclass[tightpage]{standalone} but nothing worked.I made a test program to experiment:
import tkinter as tk
import sympy as sp
from PIL import Image, ImageTk
from io import BytesIO
import os
def latex(s, label, fontsize=1, height=100, width=300):
stream = BytesIO()
sp.preview(r"$%s$\end{document}" % s, euler=False, viewer="BytesIO", output="ps",\
outputbuffer=stream, premable=r"\documentclass[tightpage]{standalone}\begin{document}") # [convert={size=25x50}]
image = Image.open(stream)
image.resize((height, width))
image.load(scale=fontsize)
photo = ImageTk.PhotoImage(image)
label.config(image=photo)
label.image=photo
stream.close()
def loadLatex():
latex(var.get(), label, fontsize=10, height=1, width=2)
win = tk.Tk()
label = tk.Label(win)
var = tk.StringVar()
tk.Entry(win, textvariable=var).grid(row=0, column=0)
tk.Button(win, text="Latex", command=loadLatex).grid(row=1, column=0)
label.grid(row=2, column=0)
win.mainloop()
RE: Latex image too big on tkinter using sympy - DPaul - Nov-05-2020
Hi, 2 observations:
1) your default output is 600x800, that is a classic 3/4.
You seem to resize to 1/3. Maybe it does not matter, but it usually does.
2) I use a different syntax to resize some png cards:
crd = Image.open('cards/' + 'card1.png')
img = ImageTk.PhotoImage(crd.resize((167, 242)))
Hope it helps,
Paul