merged ascii repo and sopel/ascii
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182
modules/ascii.py
182
modules/ascii.py
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@ -4,7 +4,6 @@
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ASCII
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"""
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from io import BytesIO
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import argparse
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import requests
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from PIL import Image, ImageFont, ImageDraw
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@ -17,58 +16,65 @@ from tools import web
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ASCII_CHARS = "$@%#*+=-:. "
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BRAIL_CHARS = "⠿⠾⠼⠸⠰⠠ "
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HEADERS = {'User-Agent': 'Gimme the ascii.'}
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HEADERS = {'User-Agent': 'Gimme ascii.'}
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def scale_image(image, size=(100,100)):
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def scale_image(image, maxDim=100):
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"""
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Resizes an image while preserving the aspect ratio. Chooses the
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dimension to scale by based on whichever is larger, ensuring that
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neither width or height is ever larger than the accepted size tuple.
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neither width or height is ever larger than the maxDim argument.
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Because text characters are typically pretty close to a 1:2 rectangle,
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we weight the width twice as much.
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"""
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original_width, original_height = image.size
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original_width = original_width * 2
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if original_width > original_height:
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if original_width > size[0]:
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new_width = size[0]
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aspect_ratio = original_height/float(original_width)
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new_height = int(aspect_ratio * new_width)
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else:
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new_width, new_height = image.size
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if original_width <= maxDim and original_height <= maxDim:
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new_width, new_height = image.size
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elif original_width > original_height:
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new_width = maxDim
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aspect_ratio = original_height/float(original_width)
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new_height = int(aspect_ratio * new_width)
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else:
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if original_height > size[1]:
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new_height = size[1]
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aspect_ratio = original_width/float(original_height)
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new_width = int(aspect_ratio * new_height)
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else:
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new_width, new_height = image.size
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new_height = maxDim
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aspect_ratio = original_width/float(original_height)
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new_width = int(aspect_ratio * new_height)
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image = image.resize((new_width, new_height))
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return image
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def pixels_to_chars(image, scale="ascii"):
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def pixels_to_chars(image, scale="ascii", color_code=None):
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"""
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Maps each pixel to an ascii char based on where it falls in the range
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0-255 normalized to the length of ASCII_CHARS.
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0-255 normalized to the length of the chosen scale.
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"""
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scales = {"ascii": ASCII_CHARS,
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"ascii_reverse": "".join(list(reversed(ASCII_CHARS))),
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"ascii_reverse": "".join(reversed(ASCII_CHARS)),
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"brail": BRAIL_CHARS,
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"brail_reverse": "".join(list(reversed(BRAIL_CHARS)))}
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"brail_reverse": "".join(reversed(BRAIL_CHARS))}
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color_prefix = {"irc": "\03", "ansi":"\033"}
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range_width = int(255 / len(scales[scale])) + (255 % len(scales[scale]) > 0)
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pixels = list(image.getdata())
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chars = []
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for pixel in pixels:
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index = int(pixel/range_width)
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chars.append(scales[scale][index])
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chars = "".join(chars)
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chars = [chars[i:i + image.size[0]] for i in range(0, len(chars),
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pixels = [pixels[i:i + image.size[0]] for i in range(0, len(pixels),
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image.size[0])]
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chars = []
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for row in pixels:
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new_row = ""
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for pixel in row:
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R, G, B = pixel
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L = R * 299/1000 + G * 587/1000 + B * 114/1000
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index = int(L/range_width)
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char = scales[scale][index]
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if color_code and char is not " ":
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prefix = color_prefix[color_code] + char_color(pixel,color_code)
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char = prefix + char
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new_row += char
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chars.append(new_row)
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return "\n".join(chars)
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@ -124,11 +130,13 @@ def open_image(imagePath):
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if imagePath.startswith("http"):
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res = requests.get(imagePath, headers=HEADERS, verify=True,
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timeout=20)
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if res.status_code == 404:
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return "404: file not found."
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res.raise_for_status()
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image = Image.open(BytesIO(res.content))
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else:
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image = Image.open(imagePath)
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except FileNotFoundError as e:
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except FileNotFoundError:
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return f"File not found: {imagePath}"
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except Exception as e:
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return(f"Error opening image: {imagePath}\n{e}")
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@ -136,21 +144,6 @@ def open_image(imagePath):
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return image
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def colorize(chars, image, code):
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"""
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Colorizes the ascii matrix.
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"""
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prefix = {"irc": "\03", "ansi":"\033"}
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chars = chars.split("\n")
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for j in range(0, image.size[1]):
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new_row = ""
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for k in range(0, image.size[0]):
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new_row += prefix[code] + char_color(image.getpixel((k,j)), code)
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new_row += chars[j][k]
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chars[j] = new_row
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return "\n".join(chars)
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def alpha_composite(front, back):
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"""Alpha composite two RGBA images.
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@ -193,36 +186,33 @@ def alpha_composite_with_color(image, color=(255, 255, 255)):
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return alpha_composite(image, back)
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def image_to_ascii(image, reverse=False, colors=None, brail=False):
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def image_to_ascii(image=None, reverse=False, brail=False, color=None,**kwargs):
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"""
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Reads an image file and converts it to ascii art. Returns a
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newline-delineated string. If reverse is True, the ascii scale is
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reversed.
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"""
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if not image:
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image = open_image(kwargs["imagePath"])
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if image.mode == "P":
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image = image.convert(image.palette.mode)
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if image.mode == "RGBA":
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image = alpha_composite_with_color(image).convert("RGB")
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image = scale_image(image)
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image_grey = image.convert('L') # convert to grayscale
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if reverse:
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if brail:
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scale = "brail_reverse"
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else:
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scale = "ascii_reverse"
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if brail:
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scale = "brail"
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else:
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if brail:
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scale = "brail"
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else:
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scale = "ascii"
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chars = pixels_to_chars(image_grey, scale)
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scale = "ascii"
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if reverse:
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scale += "_reverse"
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chars = pixels_to_chars(image, scale, color)
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if colors:
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chars = colorize(chars, image, colors)
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image.close()
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image_grey.close()
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del(image)
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del(image_grey)
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return chars
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@ -230,7 +220,7 @@ def ascii_to_image(image_ascii):
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"""
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Creates a plain image and draws text on it.
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"""
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# TODO: make font type and size non-fixed
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# TODO: make font type, size and color non-fixed
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width = len(image_ascii[:image_ascii.index("\n")]) * 8
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height = (image_ascii.count("\n")+1) * 12 + 4
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@ -241,27 +231,27 @@ def ascii_to_image(image_ascii):
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return image
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def handle_gif(image, output, reverse=False):
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def handle_gif(imagePath, **kwargs):
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"""
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Handle gifs seperately.
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"""
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# image = open_image(args.imagePath)
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image = open_image(imagePath)
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ascii_seq = []
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new_image = ascii_to_image(image_to_ascii(image, reverse))
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new_image = ascii_to_image(image_to_ascii(image, **kwargs))
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image.seek(1)
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while True:
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try:
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im = ascii_to_image(image_to_ascii(image, reverse))
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im = ascii_to_image(image_to_ascii(image, **kwargs))
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ascii_seq.append(im)
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image.seek(image.tell()+1)
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except EOFError:
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break # end of sequence
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#new_image.save(output, save_all=True, append_images=ascii_seq,
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# duration=60, loop=0, optimize=True)
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# new_image.save(output, save_all=True, append_images=ascii_seq,
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# duration=60, loop=0, optimize=True)
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ascii_seq = [new_image] + ascii_seq
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np_ascii_seq = [np.array(im) for im in ascii_seq]
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with open(output, "wb") as file:
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with open(kwargs["output"], "wb") as file:
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numpngw.write_apng(file, np_ascii_seq)
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@ -275,14 +265,18 @@ def ascii(bot, trigger):
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"""
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if not trigger.group(2):
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return bot.say()
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parser = argparse.ArgumentParser()
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parser = argparse.ArgumentParser(add_help=False)
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parser.add_argument("imagePath")
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parser.add_argument("-r", "--reverse", action="store_true")
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parser.add_argument("-r", "--reverse", action="store_true", help="Reverse.")
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parser.add_argument("-c", "--color", action="store_true")
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parser.add_argument("-b", "--brail", action="store_true")
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parser.add_argument("-a", "--animated", action="store_true")
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parser.add_argument("-h", "--help", action="store_true")
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args = parser.parse_args(trigger.group(2).split())
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if args.help:
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return bot.say(parser.print_help())
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if args.color:
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args.color = "irc"
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@ -293,24 +287,25 @@ def ascii(bot, trigger):
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bot.reply("Internet requests only.")
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return
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image = open_image(args.imagePath)
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if args.animated:
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handle_gif(image, "temp.png", args.reverse)
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args.output = "temp.png"
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handle_gif(**vars(args))
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file = {"file": open("temp.png", "rb")}
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res = requests.post("https://uguu.se/api.php?d=upload-tool", files=file)
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# print(res.text)
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bot.say(res.text)
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else:
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image_ascii = image_to_ascii(image, args.reverse, args.color, args.brail)
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image_ascii = image_to_ascii(None, **vars(args))
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bot.say(image_ascii)
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if __name__=='__main__':
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import argparse
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parser = argparse.ArgumentParser(
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description="Converts an image file to ascii art.")
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parser.add_argument(
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"imagePath",
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help="The full path to the image file.")
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help="The path to the image file. May be a local path or internet URL.")
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parser.add_argument(
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"-r",
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"--reverse",
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@ -323,9 +318,10 @@ if __name__=='__main__':
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parser.add_argument(
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"-i",
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"--image",
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dest="drawImage",
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action="store_true",
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help="Outputs the ascii art as an image rather than plain text. \
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Requires --output.")
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help="Outputs the ascii art as an image rather than text. Requires \
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--output.")
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parser.add_argument(
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"-a",
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"--animated",
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@ -335,23 +331,39 @@ if __name__=='__main__':
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"-c",
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"--color",
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type=str,
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help="Colorizes the ascii matrix.")
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parser.set_defaults(reverse=False, image=False, animated=False)
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help="Colorizes the ascii matrix. Currently supported modes are 'irc' \
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and 'ansi' for generating color codes compliant with those standards.")
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parser.add_argument(
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"--ansi",
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dest="color",
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action="store_const",
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const="ansi",
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help="Shortcut for '--color ansi'.")
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parser.add_argument(
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"--irc",
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dest="color",
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action="store_const",
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const="irc",
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help="Shortcut for '--color irc'.")
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parser.add_argument(
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"-b",
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"--brail",
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action="store_true",
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help="Uses brail unicode characters instead of ascii characters.")
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args = parser.parse_args()
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if args.animated: # --animated includes --image
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args.image = True
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if args.image: # --image requires --output
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args.drawImage = True
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if args.drawImage: # --image requires --output
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if not args.output:
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parser.error("--image requires --output")
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image = open_image(args.imagePath)
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if args.animated:
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handle_gif(image, args.output, args.reverse)
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handle_gif(**vars(args))
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exit()
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image_ascii = image_to_ascii(image, args.reverse, args.color)
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if args.image:
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image_ascii = image_to_ascii(None, **vars(args))
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if args.drawImage:
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image = ascii_to_image(image_ascii)
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image.save(args.output, "PNG")
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elif args.output:
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