| | 1 | #---------------------------------------------------------------------- |
| | 2 | # Name: wxPython.lib.imageutils |
| | 3 | # Purpose: A collection of functions for simple image manipulations |
| | 4 | # |
| | 5 | # Author: Robb Shecter |
| | 6 | # |
| | 7 | # Created: 7-Nov-2002 |
| | 8 | # RCS-ID: $Id$ |
| | 9 | # Copyright: (c) 2002 by |
| | 10 | # Licence: wxWindows license |
| | 11 | #---------------------------------------------------------------------- |
| | 12 | |
| | 13 | from __future__ import nested_scopes |
| | 14 | |
| | 15 | |
| | 16 | def grayOut(anImage): |
| | 17 | """ |
| | 18 | Convert the given image (in place) to a grayed-out |
| | 19 | version, appropriate for a 'disabled' appearance. |
| | 20 | """ |
| | 21 | factor = 0.7 # 0 < f < 1. Higher is grayer. |
| | 22 | if anImage.HasMask(): |
| | 23 | maskColor = (anImage.GetMaskRed(), anImage.GetMaskGreen(), anImage.GetMaskBlue()) |
| | 24 | else: |
| | 25 | maskColor = None |
| | 26 | data = map(ord, list(anImage.GetData())) |
| | 27 | |
| | 28 | for i in range(0, len(data), 3): |
| | 29 | pixel = (data[i], data[i+1], data[i+2]) |
| | 30 | pixel = makeGray(pixel, factor, maskColor) |
| | 31 | for x in range(3): |
| | 32 | data[i+x] = pixel[x] |
| | 33 | anImage.SetData(''.join(map(chr, data))) |
| | 34 | |
| | 35 | |
| | 36 | def makeGray((r,g,b), factor, maskColor): |
| | 37 | """ |
| | 38 | Make a pixel grayed-out. If the pixel |
| | 39 | matches the maskColor, it won't be |
| | 40 | changed. |
| | 41 | """ |
| | 42 | if (r,g,b) != maskColor: |
| | 43 | return map(lambda x: int((230 - x) * factor) + x, (r,g,b)) |
| | 44 | else: |
| | 45 | return (r,g,b) |
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