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-rw-r--r--lib/python/qmk/painter.py268
1 files changed, 268 insertions, 0 deletions
diff --git a/lib/python/qmk/painter.py b/lib/python/qmk/painter.py
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+"""Functions that help us work with Quantum Painter's file formats.
+"""
+import math
+import re
+from string import Template
+from PIL import Image, ImageOps
+
+# The list of valid formats Quantum Painter supports
+valid_formats = {
+ 'pal256': {
+ 'image_format': 'IMAGE_FORMAT_PALETTE',
+ 'bpp': 8,
+ 'has_palette': True,
+ 'num_colors': 256,
+ 'image_format_byte': 0x07, # see qp_internal_formats.h
+ },
+ 'pal16': {
+ 'image_format': 'IMAGE_FORMAT_PALETTE',
+ 'bpp': 4,
+ 'has_palette': True,
+ 'num_colors': 16,
+ 'image_format_byte': 0x06, # see qp_internal_formats.h
+ },
+ 'pal4': {
+ 'image_format': 'IMAGE_FORMAT_PALETTE',
+ 'bpp': 2,
+ 'has_palette': True,
+ 'num_colors': 4,
+ 'image_format_byte': 0x05, # see qp_internal_formats.h
+ },
+ 'pal2': {
+ 'image_format': 'IMAGE_FORMAT_PALETTE',
+ 'bpp': 1,
+ 'has_palette': True,
+ 'num_colors': 2,
+ 'image_format_byte': 0x04, # see qp_internal_formats.h
+ },
+ 'mono256': {
+ 'image_format': 'IMAGE_FORMAT_GRAYSCALE',
+ 'bpp': 8,
+ 'has_palette': False,
+ 'num_colors': 256,
+ 'image_format_byte': 0x03, # see qp_internal_formats.h
+ },
+ 'mono16': {
+ 'image_format': 'IMAGE_FORMAT_GRAYSCALE',
+ 'bpp': 4,
+ 'has_palette': False,
+ 'num_colors': 16,
+ 'image_format_byte': 0x02, # see qp_internal_formats.h
+ },
+ 'mono4': {
+ 'image_format': 'IMAGE_FORMAT_GRAYSCALE',
+ 'bpp': 2,
+ 'has_palette': False,
+ 'num_colors': 4,
+ 'image_format_byte': 0x01, # see qp_internal_formats.h
+ },
+ 'mono2': {
+ 'image_format': 'IMAGE_FORMAT_GRAYSCALE',
+ 'bpp': 1,
+ 'has_palette': False,
+ 'num_colors': 2,
+ 'image_format_byte': 0x00, # see qp_internal_formats.h
+ }
+}
+
+license_template = """\
+// Copyright ${year} QMK -- generated source code only, ${generated_type} retains original copyright
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+// This file was auto-generated by `${generator_command}`
+"""
+
+
+def render_license(subs):
+ license_txt = Template(license_template)
+ return license_txt.substitute(subs)
+
+
+header_file_template = """\
+${license}
+#pragma once
+
+#include <qp.h>
+
+extern const uint32_t ${var_prefix}_${sane_name}_length;
+extern const uint8_t ${var_prefix}_${sane_name}[${byte_count}];
+"""
+
+
+def render_header(subs):
+ header_txt = Template(header_file_template)
+ return header_txt.substitute(subs)
+
+
+source_file_template = """\
+${license}
+#include <qp.h>
+
+const uint32_t ${var_prefix}_${sane_name}_length = ${byte_count};
+
+// clang-format off
+const uint8_t ${var_prefix}_${sane_name}[${byte_count}] = {
+${bytes_lines}
+};
+// clang-format on
+"""
+
+
+def render_source(subs):
+ source_txt = Template(source_file_template)
+ return source_txt.substitute(subs)
+
+
+def render_bytes(bytes, newline_after=16):
+ lines = ''
+ for n in range(len(bytes)):
+ if n % newline_after == 0 and n > 0 and n != len(bytes):
+ lines = lines + "\n "
+ elif n == 0:
+ lines = lines + " "
+ lines = lines + " 0x{0:02X},".format(bytes[n])
+ return lines.rstrip()
+
+
+def clean_output(str):
+ str = re.sub(r'\r', '', str)
+ str = re.sub(r'[\n]{3,}', r'\n\n', str)
+ return str
+
+
+def rescale_byte(val, maxval):
+ """Rescales a byte value to the supplied range, i.e. [0,255] -> [0,maxval].
+ """
+ return int(round(val * maxval / 255.0))
+
+
+def convert_requested_format(im, format):
+ """Convert an image to the requested format.
+ """
+
+ # Work out the requested 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':
+ # 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':
+ # 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)
+
+ return im
+
+
+def convert_image_bytes(im, format):
+ """Convert the supplied image to the equivalent bytes required by the QMK firmware.
+ """
+
+ # Work out the requested format
+ ncolors = format["num_colors"]
+ image_format = format["image_format"]
+ shifter = int(math.log2(ncolors))
+ pixels_per_byte = int(8 / math.log2(ncolors))
+ (width, height) = im.size
+ expected_byte_count = ((width * height) + (pixels_per_byte - 1)) // pixels_per_byte
+
+ if image_format == 'IMAGE_FORMAT_GRAYSCALE':
+ # Take the red channel
+ image_bytes = im.tobytes("raw", "R")
+ image_bytes_len = len(image_bytes)
+
+ # No palette
+ palette = None
+
+ bytearray = []
+ for x in range(expected_byte_count):
+ byte = 0
+ for n in range(pixels_per_byte):
+ byte_offset = x * pixels_per_byte + n
+ if byte_offset < image_bytes_len:
+ # If mono, each input byte is a grayscale [0,255] pixel -- rescale to the range we want then pack together
+ byte = byte | (rescale_byte(image_bytes[byte_offset], ncolors - 1) << int(n * shifter))
+ bytearray.append(byte)
+
+ elif image_format == 'IMAGE_FORMAT_PALETTE':
+ # Convert each pixel to the palette bytes
+ image_bytes = im.tobytes("raw", "P")
+ image_bytes_len = len(image_bytes)
+
+ # Export the palette
+ palette = []
+ pal = im.getpalette()
+ for n in range(0, ncolors * 3, 3):
+ palette.append((pal[n + 0], pal[n + 1], pal[n + 2]))
+
+ bytearray = []
+ for x in range(expected_byte_count):
+ byte = 0
+ for n in range(pixels_per_byte):
+ byte_offset = x * pixels_per_byte + n
+ if byte_offset < image_bytes_len:
+ # If color, each input byte is the index into the color palette -- pack them together
+ byte = byte | ((image_bytes[byte_offset] & (ncolors - 1)) << int(n * shifter))
+ bytearray.append(byte)
+
+ if len(bytearray) != expected_byte_count:
+ raise Exception(f"Wrong byte count, was {len(bytearray)}, expected {expected_byte_count}")
+
+ return (palette, bytearray)
+
+
+def compress_bytes_qmk_rle(bytearray):
+ debug_dump = False
+ output = []
+ temp = []
+ repeat = False
+
+ def append_byte(c):
+ if debug_dump:
+ print('Appending byte:', '0x{0:02X}'.format(int(c)), '=', c)
+ output.append(c)
+
+ def append_range(r):
+ append_byte(127 + len(r))
+ if debug_dump:
+ print('Appending {0} byte(s):'.format(len(r)), '[', ', '.join(['{0:02X}'.format(e) for e in r]), ']')
+ output.extend(r)
+
+ for n in range(0, len(bytearray) + 1):
+ end = True if n == len(bytearray) else False
+ if not end:
+ c = bytearray[n]
+ temp.append(c)
+ if len(temp) <= 1:
+ continue
+
+ if debug_dump:
+ print('Temp buffer state {0:3d} bytes:'.format(len(temp)), '[', ', '.join(['{0:02X}'.format(e) for e in temp]), ']')
+
+ if repeat:
+ if temp[-1] != temp[-2]:
+ repeat = False
+ if not repeat or len(temp) == 128 or end:
+ append_byte(len(temp) if end else len(temp) - 1)
+ append_byte(temp[0])
+ temp = [temp[-1]]
+ repeat = False
+ else:
+ if len(temp) >= 2 and temp[-1] == temp[-2]:
+ repeat = True
+ if len(temp) > 2:
+ append_range(temp[0:(len(temp) - 2)])
+ temp = [temp[-1], temp[-1]]
+ continue
+ if len(temp) == 128 or end:
+ append_range(temp)
+ temp = []
+ repeat = False
+ return output
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-22 09:09:01 +0000