def main():
img = Image.open("splashscreen.gif")
# Convert to an array of gray values - data[row, column]
data = numpy.asarray(img.convert('L'))
# Flip
data = data[::-1]
# Invert
data = numpy.subtract(255, data)
# Split up into pages - pages[page, page_row:8, column]
pages = numpy.array_split(data, range(8, img.size[1], 8), 0)
# Reverse order of pages, too
pages = pages[::-1]
# Rearrange each page to be column-major - pages[page, column, page_row:8]
pages = numpy.transpose(pages, (0, 2, 1))
# Unpack into bits - pages[page, column, page_row:8, pixel_bit:8]
pages = numpy.expand_dims(pages, 3)
pages = numpy.unpackbits(pages, 3)
# Truncate to 4bpp - pages[page, column, page_row:8, pixel_bit:4]
pages = pages[:, :, :, :4]
# Transpose into bit planes - pages[page, column, pixel_bit:4, page_row:8]
pages = numpy.transpose(pages, (0, 1, 3, 2))
# Collapse bit-planes - pages[page, column, pixel_bit:4, value:1]
pages = numpy.packbits(pages, 3)
# Flatten into pages - pages[page, byte]
pages = numpy.reshape(pages, (pages.shape[0], -1))
# Compress each page - pages[page]
pages = [lzf.compress(page.tostring('C')) for page in pages]
# Neatly format the image for output
indexes = [0]
for i in range(len(pages)):
indexes.append(indexes[i] + len(pages[i]))
out = open('splashscreen.c', 'w')
out.write('#include "splashscreen.h"\n\n')
out.write("const uint8 splashscreen_data[] = {\n")
for i, page in enumerate(pages):
out.write(" // %d-%d: Page %d\n" % (indexes[i], indexes[i + 1] - 1, i))
for line in range(0, len(page), 10):
value = ''.join('0x%02X, ' % ord(x) for x in page[line:line + 10]).strip()
out.write(" %s\n" % (value,))
out.write("};\n\n")
out.write("const int16 splashscreen_indexes[] = {%s};\n" % (', '.join(str(x) for x in indexes)))
out.close()
print "Image output in %d bytes" % (sum(len(page) + 2 for page in pages) + 2,)
def point_cloud_to_fileobj(pc, fileobj, data_compression=None):
""" Write pointcloud as .pcd to fileobj.
If data_compression is not None it overrides pc.data.
"""
metadata = pc.get_metadata()
if data_compression is not None:
data_compression = data_compression.lower()
assert (data_compression in ('ascii', 'binary', 'binary_compressed'))
metadata['data'] = data_compression
header = write_header(metadata).encode('utf-8')
fileobj.write(header)
if metadata['data'].lower() == 'ascii':
fmtstr = build_ascii_fmtstr(pc)
if pc.pc_data.size == 1:
np.savetxt(fileobj, pc.pc_data.reshape((1, )), fmt=fmtstr)
else:
np.savetxt(fileobj, pc.pc_data, fmt=fmtstr)
elif metadata['data'].lower() == 'binary':
fileobj.write(pc.pc_data.tostring())
elif metadata['data'].lower() == 'binary_compressed':
# TODO
# a '_' field is ignored by pcl and breaks compressed point clouds.
# changing '_' to '_padding' or other name fixes this.
# admittedly padding shouldn't be compressed in the first place.
# reorder to column-by-column
uncompressed_lst = []
for fieldname in pc.pc_data.dtype.names:
column = np.ascontiguousarray(pc.pc_data[fieldname]).tostring()
uncompressed_lst.append(column)
uncompressed = b''.join(uncompressed_lst)
uncompressed_size = len(uncompressed)
# print("uncompressed_size = %r"%(uncompressed_size))
buf = lzf.compress(uncompressed)
if buf is None:
# compression didn't shrink the file
# TODO what do to do in this case when reading?
buf = uncompressed
compressed_size = uncompressed_size
else:
compressed_size = len(buf)
fmt = 'II'
fileobj.write(struct.pack(fmt, compressed_size, uncompressed_size))
fileobj.write(buf)
else:
raise ValueError('unknown DATA type')
def write_binary_compressed(self, file, cloud):
'''
Save point cloud data to a PCD file containing n-D points, in compressed binary format
# Parameters
file : file-like object or str
The output file or name of it.
cloud : PointCloud
The the point cloud data that need saving
'''
import struct
try:
import lzf
except ImportError:
raise ImportError(
'lzf decompression lib is required to read compressed .pcd file.' +
'lzf can be install from setup.py in https://github.com/teepark/python-lzf')
file, own = _check_file(file, 0, 'pcd', 'wb')
try:
file.write(self.generate_header(cloud, 'binary_compressed').encode('ascii'))
uncompressed_lst = []
for field in cloud.names:
column = np.ascontiguousarray(cloud.data[field]).tostring('C')
uncompressed_lst.append(column)
uncompressed = b''.join(uncompressed_lst)
uncompressed_size = len(uncompressed)
buf = lzf.compress(uncompressed)
if buf is None:
logging.getLogger('pcl.io.PCDReader.write_binary_compressed')\
.warning("compression didn't shrink the file during processing, \
which may cause data loss")
buf = uncompressed
compressed_size = uncompressed_size
else:
compressed_size = len(buf)
fmt = 'II'
file.write(struct.pack(fmt, compressed_size, uncompressed_size))
file.write(buf)
finally:
if own:
file.close()
def point_cloud_to_fileobj(pc, fileobj, data_compression=None):
""" write pointcloud as .pcd to fileobj.
if data_compression is not None it overrides pc.data.
"""
metadata = pc.get_metadata()
if data_compression is not None:
data_compression = data_compression.lower()
assert(data_compression in ('ascii', 'binary', 'binary_compressed'))
metadata['data'] = data_compression
header = write_header(metadata)
fileobj.write(header)
if metadata['data'].lower() == 'ascii':
fmtstr = build_ascii_fmtstr(pc)
np.savetxt(fileobj, pc.pc_data, fmt=fmtstr)
elif metadata['data'].lower() == 'binary':
fileobj.write(pc.pc_data.tostring('C'))
elif metadata['data'].lower() == 'binary_compressed':
# TODO
# a '_' field is ignored by pcl and breakes compressed point clouds.
# changing '_' to '_padding' or other name fixes this.
# admittedly padding shouldn't be compressed in the first place
# reorder to column-by-column
uncompressed_lst = []
for fieldname in pc.pc_data.dtype.names:
column = np.ascontiguousarray(pc.pc_data[fieldname]).tostring('C')
uncompressed_lst.append(column)
uncompressed = ''.join(uncompressed_lst)
uncompressed_size = len(uncompressed)
# print("uncompressed_size = %r"%(uncompressed_size))
buf = lzf.compress(uncompressed)
if buf is None:
# compression didn't shrink the file
# TODO what do to do in this case when reading?
buf = uncompressed
compressed_size = uncompressed_size
else:
compressed_size = len(buf)
fmt = 'II'
fileobj.write(struct.pack(fmt, compressed_size, uncompressed_size))
fileobj.write(buf)
else:
raise ValueError('unknown DATA type')
def pure_python_dumps(item, default=None, depth=0, compress=True):
"serialize a native python object into a mummy string"
if default and not hasattr(default, "__call__"):
raise TypeError("default must be callable or None")
if depth >= MAX_DEPTH:
raise ValueError("max depth exceeded")
try:
kind = _get_type_code(item)
except ValueError:
if default is None:
raise TypeError("unserializable type")
item = default(item)
kind = _get_type_code(item)
data = _dumpers[kind](item, depth, default)
datalen = len(data)
if compress and lzf and datalen > 5:
compressed = lzf.compress(data, datalen - 5)
if compressed:
data = struct.pack("!i", datalen) + compressed
kind = kind | 0x80
kind = _dump_char(kind)
return kind + data
def pure_python_dumps(item, default=None, depth=0, compress=True):
"""serialize a native python object into a mummy string
:param object: the python object to serialize
:param function default:
If the 'object' parameter is not serializable and this parameter is
provided, this function will be used to generate a fallback value to
serialize. It should take one argument (the original object), and
return something serilizable.
:param bool compress:
whether or not to attempt to compress the serialized data (default
True)
:returns: the bytestring of the serialized data
"""
if default and not hasattr(default, "__call__"):
raise TypeError("default must be callable or None")
if depth >= MAX_DEPTH:
raise ValueError("max depth exceeded")
try:
kind = _get_type_code(item)
except ValueError:
if default is None:
raise TypeError("unserializable type")
item = default(item)
kind = _get_type_code(item)
data = _dumpers[kind](item, depth, default)
datalen = len(data)
if compress and lzf and datalen > 5:
compressed = lzf.compress(data, datalen - 5)
if compressed:
data = struct.pack("!i", datalen) + compressed
kind = kind | 0x80
kind = _dump_char(kind)
return kind + data
def lzf_encode(data, level=None, header=False, out=None):
"""Compress LZF."""
return lzf.compress(data)
def compress(self, chunk):
"""Compresses a block of data using LZF compression."""
return lzf.compress(chunk)
def convert_graphic_to_c(graphic_fname, output_filename, compress, chunksize,
fmt_rgb565, fmt_4bpp, fmt_2bpp, fmt_1bpp):
print("Converting %s to gfx-%s.c/h" % (graphic_fname, output_filename))
sane_name = re.sub(r"[^a-zA-Z0-9]", "_", output_filename)
graphic_image = Image.open(graphic_fname)
if compress == True:
if chunksize < 64:
raise Exception("Chunk size must be >= 64")
if chunksize > 512:
raise Exception("Chunk size must be <= 512")
# Get image dimensions
(width, height) = graphic_image.size
# Convert image to rgb565 byte list
if fmt_rgb565:
graphic_data = image_to_rgb565(graphic_image)
newline_counter = int(width * 2)
image_format = "IMAGE_FORMAT_RGB565"
format_name = "rgb565"
elif fmt_4bpp:
graphic_data = image_to_mono4bpp(graphic_image)
newline_counter = int(width / 2)
image_format = "IMAGE_FORMAT_MONO4BPP"
format_name = "4bpp"
elif fmt_2bpp:
graphic_data = image_to_mono2bpp(graphic_image)
newline_counter = int(width / 4)
image_format = "IMAGE_FORMAT_MONO2BPP"
format_name = "2bpp"
elif fmt_1bpp:
graphic_data = image_to_mono1bpp(graphic_image)
newline_counter = int(width / 8)
image_format = "IMAGE_FORMAT_MONO1BPP"
format_name = "1bpp"
# Generate the output filenames
gfx_source_filename = "gfx-%s.c" % (output_filename)
gfx_header_filename = "gfx-%s.h" % (output_filename)
# Generate the C source file
gfx_source_file = open(gfx_source_filename, "w")
gfx_source_file.write(fileHeader)
gfx_source_file.write("/* generated from %s */\n\n" % (graphic_fname))
gfx_source_file.write("#include <stdint.h>\n")
gfx_source_file.write("#include <qp.h>\n")
gfx_source_file.write("#include <qp_common.h>\n\n")
gfx_source_file.write("// clang-format off\n\n")
if compress == True:
compressed_data = []
compressed_chunk_offsets = []
uncompressed_graphic_data = graphic_data.copy()
while len(uncompressed_graphic_data) > 0:
chunk_size = min(chunksize, len(uncompressed_graphic_data))
uncompressed_chunk = uncompressed_graphic_data[0:chunk_size]
uncompressed_graphic_data = uncompressed_graphic_data[chunk_size:]
compressed = lzf.compress(bytes(uncompressed_chunk),
int(len(uncompressed_chunk) * 2))
compressed_chunk_offsets.append(
(len(compressed_data),
len(compressed))) # keep track of where this chunk starts
compressed_data.extend(compressed)
# Write out the compressed chunk offsets
gfx_source_file.write("const uint32_t gfx_%s_chunk_offsets[%d] = {\n" %
(sane_name, len(compressed_chunk_offsets)))
for n in range(0, len(compressed_chunk_offsets)):
gfx_source_file.write(
" %4d, // chunk %-4d // compressed size: %4d / %6.2f%%\n" %
(compressed_chunk_offsets[n][0], n,
compressed_chunk_offsets[n][1],
(100 * compressed_chunk_offsets[n][1] / chunksize)))
gfx_source_file.write("};\n\n")
# Write out the compressed chunk data
gfx_source_file.write(
"static const uint8_t gfx_%s_chunk_data[%d] = {\n " %
(sane_name, len(compressed_data)))
count = 0
for j in compressed_data:
gfx_source_file.write(" 0b{0:08b}".format(j))
count += 1
if count < len(compressed_data):
gfx_source_file.write(",")
if (
count % 16
) == 0: # Place a new line when we reach the same number of pixels as each row
gfx_source_file.write("\n ")
gfx_source_file.write("\n};\n\n")
# Write out the image descriptor
gfx_source_file.write(
"const painter_compressed_image_descriptor_t gfx_%s_compressed = {"
% (sane_name))
gfx_source_file.write("\n .base = {")
gfx_source_file.write("\n .image_format = %s," % (image_format))
gfx_source_file.write("\n .compression = IMAGE_COMPRESSED_LZF,")
gfx_source_file.write("\n .width = %d," % (width))
gfx_source_file.write("\n .height = %d" % (height))
gfx_source_file.write("\n },")
gfx_source_file.write("\n .chunk_count = %d," %
(len(compressed_chunk_offsets)))
gfx_source_file.write("\n .chunk_size = %d," % (chunksize))
gfx_source_file.write("\n .chunk_offsets = gfx_%s_chunk_offsets," %
(sane_name))
gfx_source_file.write("\n .compressed_data = gfx_%s_chunk_data," %
(sane_name))
gfx_source_file.write(
"\n .compressed_size = %d // original = %d bytes (%s) / %6.2f%% of original // rgb24 = %d bytes / %6.2f%% of rgb24"
% (len(compressed_data), len(graphic_data), format_name,
(100 * len(compressed_data) / len(graphic_data)),
(3 * width * height),
(100 * len(compressed_data) / (3 * width * height))))
gfx_source_file.write("\n};\n\n")
gfx_source_file.write(
"painter_image_t gfx_%s = (painter_image_t)&gfx_%s_compressed;\n\n"
% (sane_name, sane_name))
else:
# Generate image data lookup table
gfx_source_file.write("static const uint8_t gfx_%s_data[%d] = {\n " %
(sane_name, len(graphic_data)))
count = 0
for j in graphic_data:
gfx_source_file.write(" 0b{0:08b}".format(j))
count += 1
if count < len(graphic_data):
gfx_source_file.write(",")
if (
count % newline_counter
) == 0: # Place a new line when we reach the same number of pixels as each row
gfx_source_file.write("\n ")
gfx_source_file.write("\n};\n\n")
# Write out the image descriptor
gfx_source_file.write(
"const painter_raw_image_descriptor_t gfx_%s_raw = {" %
(sane_name))
gfx_source_file.write("\n .base = {")
gfx_source_file.write("\n .image_format = %s," % (image_format))
gfx_source_file.write("\n .compression = IMAGE_UNCOMPRESSED,")
gfx_source_file.write("\n .width = %d," % (width))
gfx_source_file.write("\n .height = %d" % (height))
gfx_source_file.write("\n },")
gfx_source_file.write("\n .byte_count = %d," % (len(graphic_data)))
gfx_source_file.write("\n .image_data = gfx_%s_data," % (sane_name))
gfx_source_file.write("\n};\n\n")
gfx_source_file.write(
"painter_image_t gfx_%s = (painter_image_t)&gfx_%s_raw;\n\n" %
(sane_name, sane_name))
gfx_source_file.write("// clang-format on\n")
gfx_source_file.close()
# Generate the C header file
gfx_header_file = open(gfx_header_filename, "w")
gfx_header_file.write(fileHeader)
gfx_header_file.write("/* generated from %s */\n\n" % (graphic_fname))
gfx_header_file.write("#pragma once\n\n")
gfx_header_file.write("#include <qp.h>\n\n")
gfx_header_file.write("extern painter_image_t gfx_%s;\n" % (sane_name))
gfx_header_file.close()
def point_cloud_to_fileobj(pc, fileobj, data_compression=None):
""" write pointcloud as .pcd to fileobj.
if data_compression is not None it overrides pc.data.
"""
def write_header(_metadata, rename_padding=False):
""" given metadata as dictionary return a string header.
"""
template = """\
VERSION {version}
FIELDS {fields}
SIZE {size}
TYPE {type}
COUNT {count}
WIDTH {width}
HEIGHT {height}
VIEWPOINT {viewpoint}
POINTS {points}
DATA {data}
"""
str_metadata = _metadata.copy()
if not rename_padding:
str_metadata['fields'] = ' '.join(_metadata['fields'])
else:
new_fields = []
for f in _metadata['fields']:
if f == '_':
new_fields.append('padding')
else:
new_fields.append(f)
str_metadata['fields'] = ' '.join(new_fields)
str_metadata['size'] = ' '.join(map(str, _metadata['size']))
str_metadata['type'] = ' '.join(_metadata['type'])
str_metadata['count'] = ' '.join(map(str, _metadata['count']))
str_metadata['width'] = str(_metadata['width'])
str_metadata['height'] = str(_metadata['height'])
str_metadata['viewpoint'] = ' '.join(map(str, _metadata['viewpoint']))
str_metadata['points'] = str(_metadata['points'])
tmpl = template.format(**str_metadata)
return tmpl
def build_ascii_fmtstr(pc_):
""" make a format string for printing to ascii, using fields
%.8f minimum for rgb
%.10f for more general use?
"""
fmtstr = []
for t, cnt in zip(pc_.type, pc_.count):
if t == 'F':
fmtstr.extend(['%.10f'] * cnt)
elif t == 'I':
fmtstr.extend(['%d'] * cnt)
elif t == 'U':
fmtstr.extend(['%u'] * cnt)
else:
raise ValueError("don't know about type %s" % t)
return fmtstr
metadata = pc.get_metadata()
if data_compression is not None:
data_compression = data_compression.lower()
assert (data_compression in ('ascii', 'binary', 'binary_compressed'))
metadata['data'] = data_compression
header = write_header(metadata)
fileobj.write(header)
if metadata['data'].lower() == 'ascii':
fmtstr = build_ascii_fmtstr(pc)
np.savetxt(fileobj, pc.pc_data, fmt=fmtstr)
elif metadata['data'].lower() == 'binary':
fileobj.write(pc.pc_data.tostring('C'))
elif metadata['data'].lower() == 'binary_compressed':
# TO-DO
# a '_' field is ignored by pcl and breakes compressed point clouds.
# changing '_' to '_padding' or other name fixes this.
# admittedly padding shouldn't be compressed in the first place
# reorder to column-by-column
uncompressed_lst = []
for fieldname in pc.pc_data.dtype.names:
column = np.ascontiguousarray(pc.pc_data[fieldname]).tostring('C')
uncompressed_lst.append(column)
uncompressed = ''.join(uncompressed_lst)
uncompressed_size = len(uncompressed)
# print("uncompressed_size = %r"%(uncompressed_size))
buf = lzf.compress(uncompressed)
if buf is None:
# compression didn't shrink the file
# TO-DO what do to do in this case when reading?
buf = uncompressed
compressed_size = uncompressed_size
else:
compressed_size = len(buf)
fmt = 'II'
fileobj.write(struct.pack(fmt, compressed_size, uncompressed_size))
fileobj.write(buf)
else:
raise ValueError('unknown DATA type')
def compress(self, text):
# lzf guarantees that even if the compressed version is longer, it is
# within 104% of the original size (rounded up), so this should work
return lzf.compress(text, len(text) * 2)
def compress(data):
return chr(len(data) % 256) + chr(len(data) / 256) + lzf.compress(data)
def main():
img = Image.open("splashscreen.gif")
# Convert to an array of gray values - data[row, column]
data = numpy.asarray(img.convert('L'))
# Flip
data = data[::-1]
# Invert
data = numpy.subtract(255, data)
# Split up into pages - pages[page, page_row:8, column]
pages = numpy.array_split(data, range(8, img.size[1], 8), 0)
# Reverse order of pages, too
pages = pages[::-1]
# Rearrange each page to be column-major - pages[page, column, page_row:8]
pages = numpy.transpose(pages, (0, 2, 1))
# Unpack into bits - pages[page, column, page_row:8, pixel_bit:8]
pages = numpy.expand_dims(pages, 3)
pages = numpy.unpackbits(pages, 3)
# Truncate to 4bpp - pages[page, column, page_row:8, pixel_bit:4]
pages = pages[:, :, :, :4]
# Transpose into bit planes - pages[page, column, pixel_bit:4, page_row:8]
pages = numpy.transpose(pages, (0, 1, 3, 2))
# Collapse bit-planes - pages[page, column, pixel_bit:4, value:1]
pages = numpy.packbits(pages, 3)
# Flatten into pages - pages[page, byte]
pages = numpy.reshape(pages, (pages.shape[0], -1))
# Compress each page - pages[page]
pages = [lzf.compress(page.tostring('C')) for page in pages]
# Neatly format the image for output
indexes = [0]
for i in range(len(pages)):
indexes.append(indexes[i] + len(pages[i]))
out = open('splashscreen.c', 'w')
out.write('#include "splashscreen.h"\n\n')
out.write("const uint8 splashscreen_data[] = {\n")
for i, page in enumerate(pages):
out.write(" // %d-%d: Page %d\n" %
(indexes[i], indexes[i + 1] - 1, i))
for line in range(0, len(page), 10):
value = ''.join('0x%02X, ' % ord(x)
for x in page[line:line + 10]).strip()
out.write(" %s\n" % (value, ))
out.write("};\n\n")
out.write("const int16 splashscreen_indexes[] = {%s};\n" %
(', '.join(str(x) for x in indexes)))
out.close()
print "Image output in %d bytes" % (sum(len(page) + 2
for page in pages) + 2, )
def compress(data, *args, **kwargs):
return lzf.compress(data, *args, **kwargs)
def compress(self, text):
# lzf guarantees that even if the compressed version is longer, it is
# within 104% of the original size (rounded up), so this should work
return lzf.compress(text, len(text) * 2)
def compress(data):
return struct.pack('<H', len(data)) + lzf.compress(data)
