1  # The MIT License (MIT)
 2  #
 3  # Copyright (c) 2018 Scott Shawcroft for Adafruit Industries LLC
 4  #
 5  # Permission is hereby granted, free of charge, to any person obtaining a copy
 6  # of this software and associated documentation files (the "Software"), to deal
 7  # in the Software without restriction, including without limitation the rights
 8  # to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 9  # copies of the Software, and to permit persons to whom the Software is
10  # furnished to do so, subject to the following conditions:
11  #
12  # The above copyright notice and this permission notice shall be included in
13  # all copies or substantial portions of the Software.
14  #
15  # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16  # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17  # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
18  # AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19  # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
20  # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
21  # THE SOFTWARE.
22  """
23  `adafruit_imageload.pnm.pbm_ascii`
24  ====================================================
25  
26  Load pixel values (indices or colors) into a bitmap and for an ascii ppm,
27  return None for pallet.
28  
29  * Author(s):  Matt Land, Brooke Storm, Sam McGahan
30  
31  """
32  
33  __version__ = "0.0.0-auto.0"
34  __repo__ = "https://github.com/adafruit/Adafruit_CircuitPython_ImageLoad.git"
35  
36  
37  def load(file, width, height, bitmap=None, palette=None):
38      """
39      Load a P1 'PBM' ascii image into the displayio.Bitmap
40      """
41      next_byte = True
42      for y in range(height):
43          x = 0
44          while next_byte:
45              next_byte = file.read(1)
46              if not next_byte.isdigit():
47                  continue
48              bitmap[x, y] = 1 if next_byte == b"1" else 0
49              if x == width - 1:
50                  break
51              x += 1
52      return bitmap, palette