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Add RGB565 and RGB888 color support to Quantum Painter (#19382)

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David Hoelscher 2023-01-14 04:24:54 -06:00 • committed by GitHub
parent 5873fbe569
commit 45851a10f6
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21 changed files with 226 additions and 43 deletions
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80
lib/python/qmk/painter.py
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@ -7,6 +7,20 @@ from PIL import Image, ImageOps
# The list of valid formats Quantum Painter supports
valid_formats = {
'rgb888': {
'image_format': 'IMAGE_FORMAT_RGB888',
'bpp': 24,
'has_palette': False,
'num_colors': 16777216,
'image_format_byte': 0x09, # see qp_internal_formats.h
},
'rgb565': {
'image_format': 'IMAGE_FORMAT_RGB565',
'bpp': 16,
'has_palette': False,
'num_colors': 65536,
'image_format_byte': 0x08, # see qp_internal_formats.h
},
'pal256': {
'image_format': 'IMAGE_FORMAT_PALETTE',
'bpp': 8,
@ -144,19 +158,33 @@ def convert_requested_format(im, format):
ncolors = format["num_colors"]
image_format = format["image_format"]
# Ensure we have a valid number of colors for the palette
if ncolors <= 0 or ncolors > 256 or (ncolors & (ncolors - 1) != 0):
raise ValueError("Number of colors must be 2, 4, 16, or 256.")
# Work out where we're getting the bytes from
if image_format == 'IMAGE_FORMAT_GRAYSCALE':
# Ensure we have a valid number of colors for the palette
if ncolors <= 0 or ncolors > 256 or (ncolors & (ncolors - 1) != 0):
raise ValueError("Number of colors must be 2, 4, 16, or 256.")
# If mono, convert input to grayscale, then to RGB, then grab the raw bytes corresponding to the intensity of the red channel
im = ImageOps.grayscale(im)
im = im.convert("RGB")
elif image_format == 'IMAGE_FORMAT_PALETTE':
# Ensure we have a valid number of colors for the palette
if ncolors <= 0 or ncolors > 256 or (ncolors & (ncolors - 1) != 0):
raise ValueError("Number of colors must be 2, 4, 16, or 256.")
# If color, convert input to RGB, palettize based on the supplied number of colors, then get the raw palette bytes
im = im.convert("RGB")
im = im.convert("P", palette=Image.ADAPTIVE, colors=ncolors)
elif image_format == 'IMAGE_FORMAT_RGB565':
# Ensure we have a valid number of colors for the palette
if ncolors != 65536:
raise ValueError("Number of colors must be 65536.")
# If color, convert input to RGB
im = im.convert("RGB")
elif image_format == 'IMAGE_FORMAT_RGB888':
# Ensure we have a valid number of colors for the palette
if ncolors != 1677216:
raise ValueError("Number of colors must be 16777216.")
# If color, convert input to RGB
im = im.convert("RGB")
return im
@ -170,8 +198,12 @@ def convert_image_bytes(im, format):
image_format = format["image_format"]
shifter = int(math.log2(ncolors))
pixels_per_byte = int(8 / math.log2(ncolors))
bytes_per_pixel = math.ceil(math.log2(ncolors) / 8)
(width, height) = im.size
expected_byte_count = ((width * height) + (pixels_per_byte - 1)) // pixels_per_byte
if (pixels_per_byte != 0):
expected_byte_count = ((width * height) + (pixels_per_byte - 1)) // pixels_per_byte
else:
expected_byte_count = width * height * bytes_per_pixel
if image_format == 'IMAGE_FORMAT_GRAYSCALE':
# Take the red channel
@ -212,6 +244,44 @@ def convert_image_bytes(im, format):
byte = byte | ((image_bytes[byte_offset] & (ncolors - 1)) << int(n * shifter))
bytearray.append(byte)
if image_format == 'IMAGE_FORMAT_RGB565':
# Take the red, green, and blue channels
image_bytes_red = im.tobytes("raw", "R")
image_bytes_green = im.tobytes("raw", "G")
image_bytes_blue = im.tobytes("raw", "B")
image_pixels_len = len(image_bytes_red)
# No palette
palette = None
bytearray = []
for x in range(image_pixels_len):
# 5 bits of red, 3 MSb of green
byte = ((image_bytes_red[x] >> 3 & 0x1F) << 3) + (image_bytes_green[x] >> 5 & 0x07)
bytearray.append(byte)
# 3 LSb of green, 5 bits of blue
byte = ((image_bytes_green[x] >> 2 & 0x07) << 5) + (image_bytes_blue[x] >> 3 & 0x1F)
bytearray.append(byte)
if image_format == 'IMAGE_FORMAT_RGB888':
# Take the red, green, and blue channels
image_bytes_red = im.tobytes("raw", "R")
image_bytes_green = im.tobytes("raw", "G")
image_bytes_blue = im.tobytes("raw", "B")
image_pixels_len = len(image_bytes_red)
# No palette
palette = None
bytearray = []
for x in range(image_pixels_len):
byte = image_bytes_red[x]
bytearray.append(byte)
byte = image_bytes_green[x]
bytearray.append(byte)
byte = image_bytes_blue[x]
bytearray.append(byte)
if len(bytearray) != expected_byte_count:
raise Exception(f"Wrong byte count, was {len(bytearray)}, expected {expected_byte_count}")