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Fix epd7in3e Spectra 6 colors #410

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Fix epd7in3e Spectra 6 colors #410

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14 changes: 7 additions & 7 deletions RaspberryPi_JetsonNano/python/lib/waveshare_epd/epd7in3e.py
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Original file line number Diff line number Diff line change
@@ -1,5 +1,5 @@
# *****************************************************************************
# * | File : epd7in3f.py
# * | File : epd7in3e.py
# * | Author : Waveshare team
# * | Function : Electronic paper driver
# * | Info :
Expand Down Expand Up @@ -178,7 +178,7 @@ def init(self):
return 0

def getbuffer(self, image):
# Create a pallette with the 7 colors supported by the panel
# Create a pallette with the 6 colors supported by the panel
pal_image = Image.new("P", (1,1))
pal_image.putpalette( (0,0,0, 255,255,255, 255,255,0, 255,0,0, 0,0,0, 0,0,255, 0,255,0) + (0,0,0)*249)
# pal_image.putpalette( (0,0,0, 255,255,255, 0,255,0, 0,0,255, 255,0,0, 255,255,0, 255,128,0) + (0,0,0)*249)
Expand All @@ -192,16 +192,16 @@ def getbuffer(self, image):
else:
logger.warning("Invalid image dimensions: %d x %d, expected %d x %d" % (imwidth, imheight, self.width, self.height))

# Convert the soruce image to the 7 colors, dithering if needed
image_7color = image_temp.convert("RGB").quantize(palette=pal_image)
buf_7color = bytearray(image_7color.tobytes('raw'))
# Convert the soruce image to the 6 colors, dithering if needed
image_6color = image_temp.convert("RGB").quantize(palette=pal_image)
buf_6color = bytearray(image_6color.tobytes('raw'))

# PIL does not support 4 bit color, so pack the 4 bits of color
# into a single byte to transfer to the panel
buf = [0x00] * int(self.width * self.height / 2)
idx = 0
for i in range(0, len(buf_7color), 2):
buf[idx] = (buf_7color[i] << 4) + buf_7color[i+1]
for i in range(0, len(buf_6color), 2):
buf[idx] = (buf_6color[i] << 4) + buf_6color[i+1]
idx += 1

return buf
Expand Down