def __init__(self, fp):
lineno = 2
self.__name = fp.name
- # Maintain several dictionaries for indexing into the color database.
- # Note that while Tk supports RGB intensities of 4, 8, 12, or 16 bits,
- # for now we only support 8 bit intensities. At least on OpenWindows,
- # all intensities in the /usr/openwin/lib/rgb.txt file are 8-bit
- #
- # key is (red, green, blue) tuple, value is (name, [aliases])
- self.__byrgb = {}
- # key is name, value is (red, green, blue)
- self.__byname = {}
+ # Maintain several dictionaries for indexing into the color database.
+ # Note that while Tk supports RGB intensities of 4, 8, 12, or 16 bits,
+ # for now we only support 8 bit intensities. At least on OpenWindows,
+ # all intensities in the /usr/openwin/lib/rgb.txt file are 8-bit
+ #
+ # key is (red, green, blue) tuple, value is (name, [aliases])
+ self.__byrgb = {}
+ # key is name, value is (red, green, blue)
+ self.__byname = {}
# all unique names (non-aliases). built-on demand
self.__allnames = None
- while 1:
- line = fp.readline()
- if not line:
- break
- # get this compiled regular expression from derived class
- mo = self._re.match(line)
- if not mo:
+ while 1:
+ line = fp.readline()
+ if not line:
+ break
+ # get this compiled regular expression from derived class
+ mo = self._re.match(line)
+ if not mo:
print >> sys.stderr, 'Error in', fp.name, ' line', lineno
- lineno += 1
- continue
- # extract the red, green, blue, and name
+ lineno += 1
+ continue
+ # extract the red, green, blue, and name
red, green, blue = self._extractrgb(mo)
name = self._extractname(mo)
- keyname = name.lower()
- # BAW: for now the `name' is just the first named color with the
- # rgb values we find. Later, we might want to make the two word
- # version the `name', or the CapitalizedVersion, etc.
- key = (red, green, blue)
- foundname, aliases = self.__byrgb.get(key, (name, []))
- if foundname <> name and foundname not in aliases:
- aliases.append(name)
- self.__byrgb[key] = (foundname, aliases)
- # add to byname lookup
- self.__byname[keyname] = key
- lineno = lineno + 1
+ keyname = name.lower()
+ # BAW: for now the `name' is just the first named color with the
+ # rgb values we find. Later, we might want to make the two word
+ # version the `name', or the CapitalizedVersion, etc.
+ key = (red, green, blue)
+ foundname, aliases = self.__byrgb.get(key, (name, []))
+ if foundname <> name and foundname not in aliases:
+ aliases.append(name)
+ self.__byrgb[key] = (foundname, aliases)
+ # add to byname lookup
+ self.__byname[keyname] = key
+ lineno = lineno + 1
# override in derived classes
def _extractrgb(self, mo):
def find_byrgb(self, rgbtuple):
"""Return name for rgbtuple"""
- try:
- return self.__byrgb[rgbtuple]
- except KeyError:
- raise BadColor(rgbtuple)
+ try:
+ return self.__byrgb[rgbtuple]
+ except KeyError:
+ raise BadColor(rgbtuple)
def find_byname(self, name):
"""Return (red, green, blue) for name"""
- name = name.lower()
- try:
- return self.__byname[name]
- except KeyError:
- raise BadColor(name)
+ name = name.lower()
+ try:
+ return self.__byname[name]
+ except KeyError:
+ raise BadColor(name)
def nearest(self, red, green, blue):
"""Return the name of color nearest (red, green, blue)"""
- # BAW: should we use Voronoi diagrams, Delaunay triangulation, or
- # octree for speeding up the locating of nearest point? Exhaustive
- # search is inefficient, but seems fast enough.
- nearest = -1
- nearest_name = ''
- for name, aliases in self.__byrgb.values():
- r, g, b = self.__byname[name.lower()]
- rdelta = red - r
- gdelta = green - g
- bdelta = blue - b
- distance = rdelta * rdelta + gdelta * gdelta + bdelta * bdelta
- if nearest == -1 or distance < nearest:
- nearest = distance
- nearest_name = name
- return nearest_name
+ # BAW: should we use Voronoi diagrams, Delaunay triangulation, or
+ # octree for speeding up the locating of nearest point? Exhaustive
+ # search is inefficient, but seems fast enough.
+ nearest = -1
+ nearest_name = ''
+ for name, aliases in self.__byrgb.values():
+ r, g, b = self.__byname[name.lower()]
+ rdelta = red - r
+ gdelta = green - g
+ bdelta = blue - b
+ distance = rdelta * rdelta + gdelta * gdelta + bdelta * bdelta
+ if nearest == -1 or distance < nearest:
+ nearest = distance
+ nearest_name = name
+ return nearest_name
def unique_names(self):
# sorted
except KeyError:
raise BadColor((red, green, blue))
return [name] + aliases
-
+
\f
class RGBColorDB(ColorDB):
_re = re.compile(
# the class to instantiate if a match is found
FILETYPES = [
+ (re.compile('Xorg'), RGBColorDB),
(re.compile('XConsortium'), RGBColorDB),
(re.compile('HTML'), HTML40DB),
(re.compile('lightlink'), LightlinkDB),
if rgbtuple is None:
if color[0] <> '#':
raise BadColor(color)
- red = color[1:3]
- green = color[3:5]
- blue = color[5:7]
+ red = color[1:3]
+ green = color[3:5]
+ blue = color[5:7]
rgbtuple = int(red, 16), int(green, 16), int(blue, 16)
- _namedict[color] = rgbtuple
+ _namedict[color] = rgbtuple
return rgbtuple
global _tripdict
hexname = _tripdict.get(rgbtuple)
if hexname is None:
- hexname = '#%02x%02x%02x' % rgbtuple
- _tripdict[rgbtuple] = hexname
+ hexname = '#%02x%02x%02x' % rgbtuple
+ _tripdict[rgbtuple] = hexname
return hexname
if __name__ == '__main__':
colordb = get_colordb('/usr/openwin/lib/rgb.txt')
if not colordb:
- print 'No parseable color database found'
- sys.exit(1)
+ print 'No parseable color database found'
+ sys.exit(1)
# on my system, this color matches exactly
target = 'navy'
red, green, blue = rgbtuple = colordb.find_byname(target)
print target, ':', red, green, blue, triplet_to_rrggbb(rgbtuple)
name, aliases = colordb.find_byrgb(rgbtuple)
print 'name:', name, 'aliases:', COMMASPACE.join(aliases)
- r, g, b = (1, 1, 128) # nearest to navy
- r, g, b = (145, 238, 144) # nearest to lightgreen
- r, g, b = (255, 251, 250) # snow
+ r, g, b = (1, 1, 128) # nearest to navy
+ r, g, b = (145, 238, 144) # nearest to lightgreen
+ r, g, b = (255, 251, 250) # snow
print 'finding nearest to', target, '...'
import time
t0 = time.time()
projects / thirdparty / Python / cpython.git / commitdiff
