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#----------------------------------------------------------------------
# Name: wxPython.lib.imageutils
# Purpose: A collection of functions for simple image manipulations
#
# Author: Robb Shecter
#
# Created: 7-Nov-2002
# RCS-ID: $Id: imageutils.py,v 1.4 2003/11/12 21:29:08 RD Exp $
# Copyright: (c) 2002 by
# Licence: wxWindows license
#----------------------------------------------------------------------
from __future__ import nested_scopes
def grayOut(anImage):
"""
Convert the given image (in place) to a grayed-out
version, appropriate for a 'disabled' appearance.
"""
factor = 0.7 # 0 < f < 1. Higher is grayer.
if anImage.HasMask():
maskColor = (anImage.GetMaskRed(), anImage.GetMaskGreen(), anImage.GetMaskBlue())
else:
maskColor = None
data = map(ord, list(anImage.GetData()))
for i in range(0, len(data), 3):
pixel = (data[i], data[i+1], data[i+2])
pixel = makeGray(pixel, factor, maskColor)
for x in range(3):
data[i+x] = pixel[x]
anImage.SetData(''.join(map(chr, data)))
def makeGray((r,g,b), factor, maskColor):
"""
Make a pixel grayed-out. If the pixel
matches the maskColor, it won't be
changed.
"""
if (r,g,b) != maskColor:
return map(lambda x: int((230 - x) * factor) + x, (r,g,b))
else:
return (r,g,b)
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