143 lines
4.8 KiB
Python
Executable file
143 lines
4.8 KiB
Python
Executable file
#!/usr/bin/env python3
|
|
#
|
|
# Utility to compress Marlin RGB565 TFT data to RLE16 format.
|
|
# Reads the existing Marlin RGB565 cpp file and generates a new file with the additional RLE16 data.
|
|
#
|
|
# Usage: rle16_compress_cpp_image_data.py INPUT_FILE.cpp OUTPUT_FILE.cpp
|
|
#
|
|
import sys,struct
|
|
import re
|
|
|
|
def addCompressedData(input_file, output_file):
|
|
ofile = open(output_file, 'wt')
|
|
|
|
c_data_section = False
|
|
c_skip_data = False
|
|
c_footer = False
|
|
raw_data = []
|
|
rle_value = []
|
|
rle_count = []
|
|
arrname = ''
|
|
|
|
line = input_file.readline()
|
|
while line:
|
|
if not c_footer:
|
|
if not c_skip_data: ofile.write(line)
|
|
|
|
if "};" in line:
|
|
c_skip_data = False
|
|
c_data_section = False
|
|
c_footer = True
|
|
|
|
if c_data_section:
|
|
cleaned = re.sub(r"\s|,|\n", "", line)
|
|
as_list = cleaned.split("0x")
|
|
as_list.pop(0)
|
|
raw_data += [int(x, 16) for x in as_list]
|
|
|
|
if "const uint" in line:
|
|
# e.g.: const uint16_t marlin_logo_480x320x16[153600] = {
|
|
if "_rle16" in line:
|
|
c_skip_data = True
|
|
else:
|
|
c_data_section = True
|
|
arrname = line.split('[')[0].split(' ')[-1]
|
|
print("Found data array", arrname)
|
|
|
|
line = input_file.readline()
|
|
|
|
input_file.close()
|
|
|
|
#
|
|
# RLE16 (run length 16) encoding
|
|
# Convert data from from raw RGB565 to a simple run-length-encoded format for each word of data.
|
|
# - Each sequence begins with a count byte N.
|
|
# - If the high bit is set in N the run contains N & 0x7F + 1 unique words.
|
|
# - Otherwise it repeats the following word N + 1 times.
|
|
# - Each RGB565 word is stored in MSB / LSB order.
|
|
#
|
|
def rle_encode(data):
|
|
warn = "This may take a while" if len(data) > 300000 else ""
|
|
print("Compressing image data...", warn)
|
|
rledata = []
|
|
distinct = []
|
|
i = 0
|
|
while i < len(data):
|
|
v = data[i]
|
|
i += 1
|
|
rsize = 1
|
|
for j in range(i, len(data)):
|
|
if v != data[j]: break;
|
|
i += 1
|
|
rsize += 1
|
|
if rsize >= 128: break;
|
|
|
|
# If the run is one, add to the distinct values
|
|
if rsize == 1: distinct.append(v)
|
|
|
|
# If distinct length >= 127, or the repeat run is 2 or more,
|
|
# store the distinct run.
|
|
nr = len(distinct)
|
|
if nr and (nr >= 128 or rsize > 1 or i >= len(data)):
|
|
rledata += [(nr - 1) | 0x80] + distinct
|
|
distinct = []
|
|
|
|
# If the repeat run is 2 or more, store the repeat run.
|
|
if rsize > 1: rledata += [rsize - 1, v]
|
|
|
|
return rledata
|
|
|
|
def append_byte(data, byte, cols=240):
|
|
if data == '': data = ' '
|
|
data += ('0x{0:02X}, '.format(byte)) # 6 characters
|
|
if len(data) % (cols * 6 + 2) == 0: data = data.rstrip() + "\n "
|
|
return data
|
|
|
|
def rle_emit(ofile, arrname, rledata, rawsize):
|
|
col = 0
|
|
i = 0
|
|
outstr = ''
|
|
size = 0
|
|
while i < len(rledata):
|
|
rval = rledata[i]
|
|
i += 1
|
|
if rval & 0x80:
|
|
count = (rval & 0x7F) + 1
|
|
outstr = append_byte(outstr, rval)
|
|
size += 1
|
|
for j in range(count):
|
|
outstr = append_byte(outstr, rledata[i + j] >> 8)
|
|
outstr = append_byte(outstr, rledata[i + j] & 0xFF)
|
|
size += 2
|
|
i += count
|
|
else:
|
|
outstr = append_byte(outstr, rval)
|
|
outstr = append_byte(outstr, rledata[i] >> 8)
|
|
outstr = append_byte(outstr, rledata[i] & 0xFF)
|
|
i += 1
|
|
size += 3
|
|
|
|
outstr = outstr.rstrip()[:-1]
|
|
ofile.write("\n// Saves %i bytes\nconst uint8_t %s_rle16[%d] = {\n%s\n};\n" % (rawsize - size, arrname, size, outstr))
|
|
|
|
(w, h, d) = arrname.split("_")[-1].split('x')
|
|
ofile.write("\nconst tImage MarlinLogo{0}x{1}x16 = MARLIN_LOGO_CHOSEN({0}, {1});\n".format(w, h))
|
|
ofile.write("\n#endif // HAS_GRAPHICAL_TFT && SHOW_BOOTSCREEN\n".format(w, h))
|
|
|
|
# Encode the data, write it out, close the file
|
|
rledata = rle_encode(raw_data)
|
|
rle_emit(ofile, arrname, rledata, len(raw_data) * 2)
|
|
ofile.close()
|
|
|
|
if len(sys.argv) <= 2:
|
|
print("Utility to compress Marlin RGB565 TFT data to RLE16 format.")
|
|
print("Reads the existing Marlin RGB565 cpp file and generates a new file with the additional RLE16 data.")
|
|
print("Usage: rle16_compress_cpp_image_data.py INPUT_FILE.cpp OUTPUT_FILE.cpp")
|
|
exit(1)
|
|
|
|
output_cpp = sys.argv[2]
|
|
inname = sys.argv[1].replace('//', '/')
|
|
input_cpp = open(inname)
|
|
print("Processing", inname, "...")
|
|
addCompressedData(input_cpp, output_cpp)
|