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uc1701: Optimize swizzle_bits() code 

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
This commit is contained in:
Kevin O'Connor 2020-06-11 13:28:37 -04:00
parent 9465618adb
commit 519c3ad5ee
1 changed files with 9 additions and 7 deletions
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16
klippy/extras/display/uc1701.py
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@ -49,14 +49,16 @@ class DisplayBase:
self.send(new_data[col_pos:col_pos+count], is_data=True)
old_data[:] = new_data
def _swizzle_bits(self, data):
# Convert 8x16 data into display col/row order
bits_top = [0] * 8
bits_bot = [0] * 8
# Convert from "rows of pixels" format to "columns of pixels"
top = bot = 0
for row in range(8):
for col in range(8):
bits_top[col] |= ((data[row] >> (7 - col)) & 1) << row
bits_bot[col] |= ((data[row + 8] >> (7 - col)) & 1) << row
return (bits_top, bits_bot)
spaced = (data[row] * 0x8040201008040201) & 0x8080808080808080
top |= spaced >> (7 - row)
spaced = (data[row + 8] * 0x8040201008040201) & 0x8080808080808080
bot |= spaced >> (7 - row)
bits_top = [(top >> s) & 0xff for s in range(0, 64, 8)]
bits_bot = [(bot >> s) & 0xff for s in range(0, 64, 8)]
return (bytearray(bits_top), bytearray(bits_bot))
def set_glyphs(self, glyphs):
for glyph_name, glyph_data in glyphs.items():
icon = glyph_data.get('icon16x16')