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pynemap.py
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pynemap.py
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#!/usr/bin/env python
import glob
import gzip
import itertools
import multiprocessing
import nbt
import numpy
import os
import shmem
import StringIO
import struct
def _topographic_values(k):
if k == 8 or k == 9:
k = -1
elif k > 0:
k = 1
return k
def _hypsometric_values(k):
result = [0, 0, 0, 255]
if k > 63:
result[0] = 255
result[1] = 255 - (k - 64) * 4
else:
result[1] = 255
result[0] = k * 4
return numpy.array(result)
class LevelException(Exception):
def __init__(self, err_msg):
self.msg = err_msg
def __str__(self):
return self.msg
class Level(object):
_base_block_colors = dict({
0:(255,255,255,0), #air
1:(120,120,120,255), #stone
2:(117,176,73,255), #grass
3:(134,96,67,255), #dirt
4:(115,115,115,255), #cobblestone
5:(157,128,79,255), #wood (planks)
6:(120,120,120,0), #sapling
7:(84,84,84,255), #adminium
8:(38,92,255,51), #water (flowing?)
9:(38,92,255,51), #water (source)
10:(255,90,0,255), #lava (flowing?)
11:(255,90,0,255), #lava (source)
12:(218,210,158,255), #sand
13:(136,126,126,255), #gravel
14:(143,140,125,255), #gold ore
15:(136,130,127,255), #iron ore
16:(115,115,115,255), #coal ore
17:(102,81,51,255), #log
18:(60,192,41,100), #leaves
19:(247,232,43,255), #sponge
20:(255,255,255,64), #glass
21:(207,24,24,255), #red cloth
22:(234,140,15,255), #orange cloth
23:(242,231,6,255), #yellow cloth
24:(45,204,101,255), #lime cloth
25:(68,194,54,255), #green cloth
26:(94,208,191,255), #aqua cloth
27:(111,149,251,255), #cyan cloth
28:(61,45,255,255), #blue cloth
29:(167,41,250,255), #purple cloth
30:(122,112,250,255), #indigo cloth
31:(193,51,240,255), #violet cloth
32:(249,43,162,255), #magenta cloth
33:(255,106,252,255), #pink cloth
34:(0,0,0,255), #black cloth
35:(222,222,222,255), #white cloth
36:(222,222,222,255), #white cloth
37:(255,255,0,255), #yellow flower
38:(255,0,0,255), #red flower
39:(193,168,108,127), #brown mushroom
40:(255,0,0,127), #red mushroom
41:(231,165,45,255), #gold block
42:(191,191,191,255), #iron block
43:(200,200,200,255), #double stair
44:(200,200,200,255), #stair
45:(170,86,62,255), #brick
46:(160,83,65,255), #tnt
47:(157,128,79,255), #bookcase
48:(115,115,115,255), #mossy cobblestone
49:(26,11,43,255), #obsidian
50:(245,220,50,200), #torch
51:(255,170,30,200), #fire
52:(245,220,50,255), #mob spawner
53:(157,128,79,255), #wooden stairs
54:(125,91,38,255), #chest
55:(245,220,50,255), #redstone wire
56:(129,140,143,255), #diamond ore
57:(45,166,152,255), #diamond block
58:(114,88,56,255), #workbench
59:(146,192,0,255), #crops
60:(95,58,30,255), #tilled dirt
61:(96,96,96,255), #furnace
62:(96,96,96,255), #lit furnace
63:(111,91,54,255), #sign post
64:(136,109,67,255), #wooden door
65:(181,140,64,32), #ladder
66:(150,134,102,180), #minecart rail
67:(115,115,115,255), #stone stairs
68:(111,91,54,255), #sign
69:(111,91,54,200), #lever
70:(120,120,120,255), #stone pressure plate
71:(191,191,191,255), #iron door
72:(157,128,79,255), #wooden pressure plate
73:(131,107,107,255), #redstone ore
74:(131,107,107,255), #lit redstone ore
75:(181,140,64,32), #redstone torch (off)
76:(255,0,0,200), #redstone torch (on)
77:(120,120,120,63), #stone button
78:(255,255,255,255), #snow
79:(83,113,163,51), #ice
80:(250,250,250,255), #snow block
81:(25,120,25,255), #cactus
82:(151,157,169,255), #clay
83:(193,234,150,255), #reeds
84:(107,71,50,255), #jukebox
85:(157,128,79,191), #fence
})
base_block_colors = numpy.array([_base_block_colors.get(color, (255,255,255,0)) for color in range(255)], dtype=numpy.uint8)
shaded_block_colors = base_block_colors >> 1
topographic_translator = numpy.array([_topographic_values(n) for n in xrange(255)])
topographic_colors = numpy.array(
[(255, 255, 255, 0), (0, 0, 255, 30)] +
[_hypsometric_values(n) for n in xrange(128)]
)
color_depth = 4
chunk_size_X = 16
chunk_size_Z = 16
chunk_size_Y = 128
def __init__(self, level_file):
self.level_file = level_file
self.is_McRegion = False
try:
self.level_file = nbt.NBTFile(self.level_file, 'rb')
#do something here to checkout the level file?
except IOError, err:
#should probably do something more worthwhile here
raise err
self.level_dir = os.path.dirname(level_file)
chunk_files = glob.glob(os.path.join(self.level_dir, '*', '*', 'c.*.*.dat'))
if len(chunk_files) == 0:
self.is_McRegion = True
chunk_files = glob.glob(os.path.join(self.level_dir, 'region', 'r.*.*.mcr'))
self.chunk_files = sorted(
sorted(
chunk_files,
key=lambda chunk_file: int(os.path.basename(chunk_file).split('.')[1],36)
),
key=lambda chunk_file: int(os.path.basename(chunk_file).split('.')[2],36)
)
self.chunk_count = len(self.chunk_files)
self.level_size = dict({
'x_min':0,
'x_max':0,
'z_min':0,
'z_max':0,
})
if self.is_McRegion:
chunks_pos = list()
for chunk_file in chunk_files:
region_pos = os.path.basename(chunk_file).split('.')
region_x, region_z = int(region_pos[1]) * 32, int(region_pos[2]) * 32
chunks_pos += map(lambda chunk: (region_x + chunk['Level']['xPos'].value, region_z + chunk['Level']['zPos'].value), region_chunks(chunk_file))
chunks_xpos, chunks_zpos = zip(*chunks_pos)
else:
chunks_xpos = map(lambda chunk_file: int(os.path.basename(chunk_file).split('.')[1],36), self.chunk_files)
chunks_zpos = map(lambda chunk_file: int(os.path.basename(chunk_file).split('.')[2],36), self.chunk_files)
self.level_size['x_min'] = min(chunks_xpos)
self.level_size['x_max'] = max(chunks_xpos)
self.level_size['z_min'] = min(chunks_zpos)
self.level_size['z_max'] = max(chunks_zpos)
# Make sure that the dimensions of the level provide equal or more chunks
# than there are chunk files.
assert (abs(self.level_size['x_min']) + 1 + self.level_size['x_max']) * \
(abs(self.level_size['z_min']) + 1 + self.level_size['z_max']) >= \
self.chunk_count
def __str__(self):
return 'Name: %s, Chunks: %i, Size: %s' % (os.path.basename(self.level_dir), self.chunk_count, str(self.level_size))
_1024_UINT32_STRUCT = struct.Struct('!1024I')
UINT32_STRUCT = struct.Struct('!I')
def bytes_to_location_and_size(n):
# Locations are stored on the first 3 bytes
# Last byte is the size of the chunk
# Additionnally, sizes are given in 4KiB sector count
location = (int(n) >> 8) << 12
size = (int(n) & 0xff) << 12
return location, size
def region_chunks(chunk_region_file):
chunk_region = file(chunk_region_file, 'rb')
# Read where each chunk is
locations_and_sizes = _1024_UINT32_STRUCT.unpack(chunk_region.read(_1024_UINT32_STRUCT.size))
# Now convert them to (location, size) tuples
locations_and_sizes = map(bytes_to_location_and_size, locations_and_sizes)
for location, size_ in locations_and_sizes:
if location and size_:
chunk_region.seek(location)
size = UINT32_STRUCT.unpack(chunk_region.read(UINT32_STRUCT.size))[0] - 1
compression_type = ord(chunk_region.read(1))
data = chunk_region.read(size).decode('zlib') + '\0'
nbt_ = nbt.NBTFile()
nbt_.parse_file(file=StringIO.StringIO(data))
yield nbt_
def render_overhead_chunk_file((chunk_file, map_size, render_options)):
_render_overhead_chunk(nbt.NBTFile(chunk_file, 'rb'), map_size, render_options)
def render_overhead_chunk_region((chunk_region_file, map_size, render_options)):
for chunk in region_chunks(chunk_region_file):
_render_overhead_chunk(chunk, map_size, render_options)
def _render_overhead_chunk(chunk, map_size, render_options):
array_offset_X = (abs(map_size['x_min']) + chunk['Level']['xPos'].value) * Level.chunk_size_X
array_offset_Z = (abs(map_size['z_min']) + chunk['Level']['zPos'].value) * Level.chunk_size_Z
try:
blocks = numpy.fromstring(chunk['Level']['Blocks'].value, dtype=numpy.uint8).reshape(Level.chunk_size_X, Level.chunk_size_Z, Level.chunk_size_Y)
for y in xrange(Level.chunk_size_Y):
colors = Level.base_block_colors[blocks[...,y]].reshape(Level.chunk_size_X, Level.chunk_size_Z, Level.color_depth)
image_array[array_offset_Z : array_offset_Z + Level.chunk_size_Z,
array_offset_X : array_offset_X + Level.chunk_size_X] = overlay_chunk(
colors.swapaxes(0, 1),
image_array[array_offset_Z : array_offset_Z + Level.chunk_size_Z,
array_offset_X : array_offset_X + Level.chunk_size_X])
print 'Finished chunk %s' % str((array_offset_X, array_offset_Z))
except IndexError, err:
print 'Failed chunk: %s' % err
def render_oblique_chunk((chunk_file, map_size, render_options)):
_render_oblique_chunk(nbt.NBTFile(chunk_file, 'rb'), map_size, render_options)
def render_oblique_chunk_region((chunk_region_file, map_size, render_options)):
for chunk in region_chunks(chunk_region_file):
_render_oblique_chunk(chunk, map_size, render_options)
def _render_oblique_chunk(chunk, map_size, render_options):
array_offset_X = (abs(map_size['x_min']) + chunk['Level']['xPos'].value) * Level.chunk_size_X
array_offset_Z = (abs(map_size['z_min']) + chunk['Level']['zPos'].value) * Level.chunk_size_Z
try:
blocks = numpy.fromstring(chunk['Level']['Blocks'].value, dtype=numpy.uint8).reshape(Level.chunk_size_X, Level.chunk_size_Z, Level.chunk_size_Y)
new_chunk_pixels = image_array[array_offset_Z : array_offset_Z + Level.chunk_size_Z * 2 + Level.chunk_size_Y,
array_offset_X : array_offset_X + Level.chunk_size_X]
for y in range(Level.chunk_size_Y):
colors = Level.base_block_colors[blocks[...,y]].reshape(Level.chunk_size_X, Level.chunk_size_Z, Level.color_depth)
shaded_colors = Level.base_block_colors[blocks[...,y]].reshape(Level.chunk_size_X, Level.chunk_size_Z, Level.color_depth)
for z,x in itertools.product(*map(xrange, [Level.chunk_size_X, Level.chunk_size_Z])):
try:
new_chunk_pixels[(Level.chunk_size_Y - y) + z, x] = overlay_pixel(colors[x, z], new_chunk_pixels[(Level.chunk_size_Y - y) + z, x])
new_chunk_pixels[(Level.chunk_size_Y - y) + z + 1, x] = overlay_pixel(shaded_colors[x, z], new_chunk_pixels[(Level.chunk_size_Y - y) + z + 1, x])
except IndexError:
pass
image_array[array_offset_Z : array_offset_Z + Level.chunk_size_Z * 2 + Level.chunk_size_Y,
array_offset_X : array_offset_X + Level.chunk_size_X] = new_chunk_pixels
except IndexError, err:
print 'Failed chunk: %s' % err
def render_topographic_chunk_file((chunk_file, map_size, render_options)):
_render_topographic_chunk(nbt.NBTFile(chunk_file, 'rb'), map_size, render_options)
def render_topographic_chunk_region((chunk_region_file, map_size, render_options)):
for chunk in region_chunks(chunk_region_file):
_render_topographic_chunk(chunk, map_size, render_options)
def _render_topographic_chunk(chunk, map_size, render_options):
array_offset_X = (abs(map_size['x_min']) + chunk['Level']['xPos'].value) * Level.chunk_size_X
array_offset_Z = (abs(map_size['z_min']) + chunk['Level']['zPos'].value) * Level.chunk_size_Z
try:
blocks = numpy.fromstring(chunk['Level']['Blocks'].value, dtype=numpy.uint8).reshape(Level.chunk_size_X, Level.chunk_size_Z, Level.chunk_size_Y)
for y in xrange(Level.chunk_size_Y):
profile = Level.topographic_translator[blocks[...,y]]
water = (profile == -1) * 1
colors = Level.topographic_colors[((profile + water) * (y + 2)) + water].reshape(
Level.chunk_size_X, Level.chunk_size_Z, Level.color_depth
)
image_array[array_offset_Z : array_offset_Z + Level.chunk_size_Z,
array_offset_X : array_offset_X + Level.chunk_size_X] = overlay_chunk(
colors.swapaxes(0, 1),
image_array[array_offset_Z : array_offset_Z + Level.chunk_size_Z,
array_offset_X : array_offset_X + Level.chunk_size_X])
print 'Finished chunk %s' % str((array_offset_X, array_offset_Z))
except IndexError, err:
print 'Failed chunk: %s' % err
def init_image_array(map_image_size, default_color=(0,0,0,0)):
image_array = shmem.create((map_image_size[1], map_image_size[0], Level.color_depth), dtype=numpy.uint8)
image_array[:] = default_color
return image_array
def overlay_chunk(src_chunk, dest_chunk):
# Courtesy of Peter B. ([email protected])
chunk = numpy.zeros((Level.chunk_size_Z, Level.chunk_size_X, Level.color_depth), dtype=numpy.uint32)
"""
blend( (sL,sA), (dL,dA) ) = t1 + t2 + t3
t1 = sL * sA * dA / (255^2)
t2 = dL * dA * (!sA) / (255^2)
t3 = sL * (!dA) / 255
"""
src_channel_R = src_chunk[:,:,0].astype(numpy.uint32)
dest_channel_R = dest_chunk[:,:,0].astype(numpy.uint32)
src_channel_G = src_chunk[:,:,1].astype(numpy.uint32)
dest_channel_G = dest_chunk[:,:,1].astype(numpy.uint32)
src_channel_B = src_chunk[:,:,2].astype(numpy.uint32)
dest_channel_B = dest_chunk[:,:,2].astype(numpy.uint32)
src_channel_A = src_chunk[:,:,3].astype(numpy.uint32)
dest_channel_A = dest_chunk[:,:,3].astype(numpy.uint32)
for i, (s,d) in enumerate(zip(
(src_channel_R, src_channel_G, src_channel_B),
(dest_channel_R, dest_channel_G, dest_channel_B)
)):
chunk[:,:,i] = (
#t1 = sL * sA * dA / (255^2)
(s * src_channel_A * dest_channel_A / 65025) +
#t2 = dL * dA * (!sA) / (255^2)
(d * dest_channel_A * (255 - src_channel_A) / 65025) +
#t3 = sL * (!dA) / 255
(s * (255 - dest_channel_A) / 255)
)
chunk[:,:,3] = (src_channel_A * dest_channel_A) / 255 + \
(src_channel_A * (255 - dest_channel_A)) / 255 + \
(dest_channel_A * (255 - src_channel_A) / 255)
return chunk.reshape(Level.chunk_size_Z, Level.chunk_size_X, Level.color_depth).astype(numpy.uint8)
def overlay_pixel(src, dst):
pixel = numpy.array([
#RED
((src[3] * src[0] * dst[3])/255**2) +
((src[0] * (255 - dst[3]))/255 ) +
((dst[0] * dst[3] * (255 - src[3]))/255**2),
#GREEN
((src[3] * src[1] * dst[3])/255**2) +
((src[1] * (255 - dst[3]))/255 ) +
((dst[1] * dst[3] * (255 - src[3]))/255**2),
#BLUE
((src[3] * src[2] * dst[3])/255**2) +
((src[2] * (255 - dst[3]))/255 ) +
((dst[2] * dst[3] * (255 - src[3]))/255**2),
#ALPHA
(src[3] * dst[3] )/255 + (src[3] * (255 - dst[3]))/255 + (dst[3] * (255 - src[3])/255)
],
dtype=numpy.uint8)
return pixel
render_modes = {
'overhead': { False: render_overhead_chunk_file, True: render_overhead_chunk_region },
#'oblique': { False: render_oblique_chunk_file, True: render_oblique_chunk_region },
'topographic': { False: render_topographic_chunk_file, True: render_topographic_chunk_region },
}
if __name__ == '__main__':
import getopt, sys
import Image
def main():
short_options = 'o:r:v'
long_options = [
'output-file=',
'render-mode=',
'processes=',
'verbose',
]
options = dict({
'level-file':None,
'render-mode':'overhead',
'output-file':'map.png',
'verbose':False,
'processes':multiprocessing.cpu_count(),
})
render_options = dict({
'slices':None,
'blocks':None,
})
try:
opts, args = getopt.gnu_getopt(sys.argv[1:], short_options, long_options)
try:
options['level-file'] = args[0]
except IndexError:
raise getopt.GetoptError('Missing level-file argument')
for opt,arg in opts:
if opt in ('-o', '--output-file'):
options['output-file'] = arg
elif opt in ('-r', '--render-mode'):
if arg in render_modes:
options['render-mode'] = arg
else:
raise getopt.GetoptError('Invalid option (%s) argument (%s)' %
(opt, arg))
elif opt in ('-v', '--verbose'):
options['verbose'] = True
elif opt == '--processes':
options['processes'] = max(int(arg), 1)
else:
pass
except getopt.GetoptError, error:
print error
usage()
return None
def _get_chunk_args(chunk_file):
return (chunk_file, level.level_size, render_options)
def _init_multiprocess(array):
global image_array
image_array = array
level = Level(level_file=options['level-file'])
if options['verbose']: print level
if options['render-mode'] == 'oblique':
map_image_size_addon = (0,Level.chunk_size_Y)
else:
map_image_size_addon = (0,0)
map_image_size = (
(level.level_size['x_max'] + abs(level.level_size['x_min']) + 1) * Level.chunk_size_X + map_image_size_addon[0],
(level.level_size['z_max'] + abs(level.level_size['z_min']) + 1) * Level.chunk_size_Z + map_image_size_addon[1],
)
global image_array
image_array = init_image_array(map_image_size)
pool = multiprocessing.Pool(options['processes'], _init_multiprocess, (image_array,))
if options['verbose']: print 'Rendering...'
if True: # Switch multiprocessing on (True) or off (False)
pool.map(render_modes[options['render-mode']][level.is_McRegion], map(_get_chunk_args, level.chunk_files), level.chunk_count/options['processes'])
else:
for args in map(_get_chunk_args, level.chunk_files):
render_modes[options['render-mode']][level.is_McRegion](args)
#for x in range(5): render_oblique_chunk((level.chunk_files[x], level.level_size, render_options))
Image.fromarray(image_array, 'RGBA').save(options['output-file'])
def usage():
print """%s: [options] path/to/world/level.dat
General Options:
-o|--output-file <filename>
The filename of the resulting image. Should end with ".png"
default: map.png
-r|--render-mode <%s>
The method for rendering the map image
default: overhead
-v|--verbose
Output progress and other messages
default: off (quiet)
--processes <count>
Set the number of render processes
default: # of cpu cores""" % \
(sys.argv[0], render_modes.keys())
main()