69 lines
2.5 KiB
Python
69 lines
2.5 KiB
Python
# -*- mode: python; c-basic-offset: 2; indent-tabs-mode: nil; -*-
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation version 2.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://gnu.org/licenses/gpl-2.0.txt>
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import socket
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class Flaschen(object):
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'''A Framebuffer display interface that sends a frame via UDP.'''
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def __init__(self, host, port, width, height, layer=5, transparent=False):
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'''
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Args:
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host: The flaschen taschen server hostname or ip address.
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port: The flaschen taschen server port number.
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width: The width of the flaschen taschen display in pixels.
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height: The height of the flaschen taschen display in pixels.
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layer: The layer of the flaschen taschen display to write to.
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transparent: If true, black(0, 0, 0) will be transparent and show the layer below.
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'''
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self.width = width
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self.height = height
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self.layer = layer
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self.transparent = transparent
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self._sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
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self._sock.connect((host, port))
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header = ''.join(["P6\n",
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"%d %d\n" % (self.width, self.height),
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"255\n"]).encode('utf-8')
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footer = ''.join(["0\n",
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"0\n",
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"%d\n" % self.layer]).encode('utf-8')
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self._data = bytearray(width * height * 3 + len(header) + len(footer))
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self._data[0:len(header)] = header
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self._data[-1 * len(footer):] = footer
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self._header_len = len(header)
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def set(self, x, y, color):
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'''Set the pixel at the given coordinates to the specified color.
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Args:
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x: x offset of the pixel to set
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y: y offset of the piyel to set
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color: A 3 tuple of (r, g, b) color values, 0-255
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'''
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if x >= self.width or y >= self.height or x < 0 or y < 0:
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return
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if color == (0, 0, 0) and not self.transparent:
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color = (1, 1, 1)
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offset = (x + y * self.width) * 3 + self._header_len
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self._data[offset] = color[0]
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self._data[offset + 1] = color[1]
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self._data[offset + 2] = color[2]
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def send(self):
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'''Send the updated pixels to the display.'''
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self._sock.send(self._data)
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