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import colorsys
from itertools import product
from ctypes import c_size_t, c_uint8, c_void_p, c_float, CDLL, Structure, POINTER
import numpy as np
import time
CRATE_WIDTH = 5
CRATE_HEIGHT = 4
CRATES_X = 8
CRATES_Y = 4
DISPLAY_WIDTH = CRATES_X*CRATE_WIDTH
DISPLAY_HEIGHT = CRATES_Y*CRATE_HEIGHT
CRATE_SIZE = CRATE_WIDTH*CRATE_HEIGHT*3
FRAME_SIZE = DISPLAY_WIDTH*DISPLAY_HEIGHT
# Gamma factor
GAMMA = 2.5
# Brightness of the LEDs in percent. 1.0 means 100%.
BRIGHTNESS = 1.0
ml = CDLL('./libml.so')
ml.matelight_open.restype = c_void_p
if ml.matelight_usb_init():
raise OSError('Cannot initialize USB library')
matelights = ml.matelight_open()
if matelights is None:
raise ImportError('Cannot open any Mate Light devices')
dbuf = np.zeros(DISPLAY_WIDTH*DISPLAY_HEIGHT*4, dtype=np.uint8)
def sendframe(framedata):
""" Send a frame to the display
The argument contains a h * w array of 3-tuples of (r, g, b)-data or 4-tuples of (r, g, b, a)-data where the a
channel is ignored.
"""
# just use the first Mate Light available
rgba = len(framedata) == DISPLAY_WIDTH*DISPLAY_HEIGHT*4
global dbuf
np.copyto(dbuf[:640*(3+rgba)], np.frombuffer(framedata, dtype=np.uint8))
ml.matelight_send_frame(matelights, dbuf.ctypes.data_as(POINTER(c_uint8)), c_size_t(CRATES_X), c_size_t(CRATES_Y), c_float(BRIGHTNESS), rgba)
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