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""" |
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A command-line tool for combining multiple image files into |
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POV-Ray density file (DF3). |
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""" |
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from __future__ import print_function |
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import sys |
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import argparse |
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import struct |
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import glob |
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from PIL import Image |
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from df3tools.exceptions import Df3Exception |
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def to_big_endian(value): |
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""" Convert integer to big-endian byte string """ |
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return struct.pack(">L", value) |
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def detect_size(prefix, silent): |
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""" |
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Detect image size and number of layers. |
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:param prefix: input files prefix |
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:param silent: suppress output (info messages, progress etc.) |
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:returns: Tuple with sizes. |
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""" |
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files = sorted(glob.glob(prefix + "*")) |
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num_layers = len(files) |
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if num_layers == 0: |
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raise Df3Exception("No files found with prefix '%s'" % prefix) |
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width, height = Image.open(files[0]).size |
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if not silent: |
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print("Size: %dx%d, %d layers" % (width, height, num_layers)) |
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return (files, width, height, num_layers) |
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def df3combine(filename, prefix="layer", silent=True): |
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""" |
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Combine a series of separate images into POV-Ray density file (DF3). |
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:param filename: path to resulting DF3 file |
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:param prefix: input files prefix |
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:param silent: suppress output (info messages, progress etc.) |
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""" |
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files, width, height, num_layers = detect_size(prefix, silent) |
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with open(filename, "wb") as df3_file: |
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# write header |
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df3_file.write(to_big_endian(width)[-2:]) |
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df3_file.write(to_big_endian(height)[-2:]) |
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df3_file.write(to_big_endian(num_layers)[-2:]) |
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# write layers data |
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for img_num, img_name in enumerate(files): |
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img = Image.open(img_name) |
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img_data = img.convert("L").tobytes("raw", "L") |
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df3_file.write(img_data) |
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percentage = float(img_num + 1) / num_layers * 100 |
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if not silent: |
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sys.stdout.write("Processing data [%.2f%%]\r" % percentage) |
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sys.stdout.flush() |
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if not silent: |
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print("\nDone.") |
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def main(): |
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""" Main script execution """ |
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parser = argparse.ArgumentParser(description=""" |
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Combine a series of separate images into POV-Ray density file (DF3) |
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""") |
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parser.add_argument("df3file", help="Resulting DF3 filename") |
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parser.add_argument("-p", "--prefix", type=str, |
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default="layer", |
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help="Input files prefix") |
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parser.add_argument("-s", "--silent", help="Suppress output", |
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default=False, action="store_true") |
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args = parser.parse_args() |
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df3combine(args.df3file, args.prefix, args.silent) |
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a5kin /
df3tools
