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authorBarry Warsaw <barry@python.org>1998-01-31 23:38:48 (GMT)
committerBarry Warsaw <barry@python.org>1998-01-31 23:38:48 (GMT)
commit9f4d73a9cf2f8416ad91d2165530f723b5676112 (patch)
tree31252c91385330ed9e8b9f2b0f94c085c7480b69 /Tools
parentbfbe67f47ff161fc08d45af3213772162d2d0e26 (diff)
downloadcpython-9f4d73a9cf2f8416ad91d2165530f723b5676112.zip
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BadColor: new exception class
rrggbb_to_triplet(): New utility function
Diffstat (limited to 'Tools')
-rw-r--r--Tools/pynche/ColorDB.py46
1 files changed, 43 insertions, 3 deletions
diff --git a/Tools/pynche/ColorDB.py b/Tools/pynche/ColorDB.py
index 6fa5577..d479c13 100644
--- a/Tools/pynche/ColorDB.py
+++ b/Tools/pynche/ColorDB.py
@@ -16,6 +16,9 @@ Supporte file types are:
import sys
import re
+class BadColor(Exception):
+ pass
+
# generic class
class ColorDB:
@@ -66,11 +69,16 @@ class ColorDB:
def find(self, red, green, blue):
rrggbb = (red << 16) + (blue << 8) + green
- return self.__byrrggbb.get(rrggbb, (None, []))
+ try:
+ return self.__byrrggbb[rrggbb]
+ except KeyError:
+ raise BadColor(red, green, blue)
def find_byname(self, name):
- # TBD: is the unfound value right?
- return self.__byname.get(name, (0, 0, 0, 0))
+ try:
+ return self.__byname[name]
+ except KeyError:
+ raise BadColor(name)
def nearest(self, red, green, blue):
# TBD: use Voronoi diagrams, Delaunay triangulation, or octree for
@@ -126,6 +134,37 @@ def get_colordb(file, filetype=X_RGB_TXT):
fp.close()
return colordb
+
+
+def rrggbb_to_triplet(color):
+ """Converts a #rrggbb color to the tuple (red, green, blue)."""
+ if color[0] <> '#':
+ raise BadColor(color)
+
+ zero = ord('0')
+ a = ord('a')
+ A = ord('A')
+ def _hexchar(c, zero=zero, a=a, A=A):
+ v = ord(c)
+ if v >= zero and v <= zero+9:
+ return v - zero
+ elif v >= a and v <= a+26:
+ return v - a + 10
+ elif v >= A and v <= A+26:
+ return v - A + 10
+ else:
+ raise BadColor
+
+ try:
+ digits = map(_hexchar, color[1:])
+ except BadColor:
+ raise BadColor(color)
+ red = digits[0] * 16 + digits[1]
+ green = digits[2] * 16 + digits[3]
+ blue = digits[4] * 16 + digits[5]
+ return (red, green, blue)
+
+
if __name__ == '__main__':
import string
@@ -150,3 +189,4 @@ if __name__ == '__main__':
nearest = apply(colordb.nearest, target)
t1 = time.time()
print 'found nearest color', nearest, 'in', t1-t0, 'seconds'
+