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#!/usr/bin/env python
from ctypes import CDLL, POINTER, c_void_p, Structure, c_uint8, c_size_t, cast
import numpy as np
from matelight import sendframe
class COLOR(Structure):
_fields_ = ('r', c_uint8), ('g', c_uint8), ('b', c_uint8), ('a', c_uint8)
class FRAMEBUFFER(Structure):
_fields_ = ('data', POINTER(COLOR)), ('w', c_size_t), ('h', c_size_t)
bdf = CDLL('./libbdf.so')
bdf.read_bdf_file.restype = c_void_p
bdf.framebuffer_render_text.restype = POINTER(FRAMEBUFFER)
unifont = bdf.read_bdf_file('unifont.bdf')
def render_text(text):
assert unifont
fb = bdf.framebuffer_render_text(str(text), unifont)
fbd = fb.contents
buf = np.ctypeslib.as_array(cast(fbd.data, POINTER(c_uint8)), shape=(fbd.h, fbd.w, 4))
# Set data pointer to NULL before freeing framebuffer struct to prevent free_framebuffer from also freeing the data
# buffer that is now used by numpy
fb.data = cast(c_void_p(), POINTER(COLOR))
bdf.free_framebuffer(fb)
return buf
if __name__ == '__main__':
sendframe(render_text('test'));
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