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https://github.com/Sneed-Group/Poodletooth-iLand
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163 lines
4.3 KiB
Python
Executable file
163 lines
4.3 KiB
Python
Executable file
#----------------------------------------------------------------------
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# Name: wx.lib.imageutils
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# Purpose: A collection of functions for simple image manipulations
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#
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# Author: Robb Shecter
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#
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# Created: 7-Nov-2002
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# Copyright: (c) 2002 by
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# Licence: wxWindows license
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# Tags: phoenix-port, unittest, documented
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#----------------------------------------------------------------------
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"""
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This module contains a collection of functions for simple image manipulations.
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Description
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===========
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This module contains a collection of functions for simple image manipulations.
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The 2 functions defined here (:func:`grayOut`, :func:`makeGray` and :func:`stepColour`)
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can be used to convert a given image into a grey-scale representation and to
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darken/lighten a specific wxPython :class:`Colour`.
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Usage
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=====
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Sample usage::
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import wx
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from wx.lib.imageutils import grayOut, stepColour
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app = wx.App(0)
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bmp = wx.ArtProvider.GetBitmap(wx.ART_INFORMATION, wx.ART_OTHER, (32, 32))
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disabled_bmp = wx.Bitmap(grayOut(bmp.ConvertToImage()))
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colour = wx.Colour(100, 120, 130)
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# Darker
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dark_colour = stepColour(colour, 50)
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# Lighter
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light_colour = stepColour(colour, 120)
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app.MainLoop()
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"""
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import wx
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def grayOut(anImage):
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"""
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Convert the given image (in place) to a grayed-out
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version, appropriate for a 'disabled' appearance.
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:param Image `anImage`: the image we want to convert to gray-scale.
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:rtype: :class:`Image`
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:returns: The modified (greyed out) image.
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.. note:: the image is converted in place, i.e. the input image will
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be modified to a greyed out version.
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"""
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factor = 0.7 # 0 < f < 1. Higher is grayer.
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if anImage.HasMask():
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maskColor = (anImage.GetMaskRed(), anImage.GetMaskGreen(), anImage.GetMaskBlue())
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else:
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maskColor = None
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if anImage.HasAlpha():
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alpha = anImage.GetAlpha()
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else:
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alpha = None
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data = anImage.GetData()
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for i in range(0, len(data), 3):
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pixel = (data[i], data[i+1], data[i+2])
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pixel = makeGray(pixel, factor, maskColor)
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for x in range(3):
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data[i+x] = pixel[x]
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anImage.SetData(data) # ''.join(map(chr, data)))
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if alpha:
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anImage.SetAlpha(alpha)
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def makeGray(rgb, factor, maskColor):
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"""
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Make a pixel grayed-out. If the pixel matches the maskColor, it won't be
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changed.
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:param tuple `rgb`: a tuple of red, green, blue integers, defining the pixel :class:`Colour`;
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:param float `factor`: the amount for which we want to grey out a pixel colour;
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:param `maskColor`: the mask colour.
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:type `maskColor`: tuple or :class:`Colour`.
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:rtype: tuple
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:returns: An RGB tuple with the greyed out pixel colour.
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"""
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if rgb != maskColor:
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return tuple([int((230 - x)*factor) + x for x in rgb])
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else:
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return rgb
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def stepColour(c, step):
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"""
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An utility function that simply darkens or lightens a
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color, based on the specified step value. A step of 0 is
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completely black and a step of 200 is totally white, and 100
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results in the same color as was passed in.
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:param Colour `c`: the input colour to be modified (darkened or lightened);
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:param integer `step`: the step value.
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:rtype: :class:`Colour`
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:returns: A new colour, darkened or lightened depending on the input `step` value.
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"""
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def _blendColour(fg, bg, dstep):
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result = bg + (dstep * (fg - bg))
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if result < 0:
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result = 0
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if result > 255:
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result = 255
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return result
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if step == 100:
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return c
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r = c.Red()
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g = c.Green()
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b = c.Blue()
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# step is 0..200 where 0 is completely black
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# and 200 is completely white and 100 is the same
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# convert that to a range of -1.0 .. 1.0
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step = min(step, 200)
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step = max(step, 0)
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dstep = (step - 100.0)/100.0
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if step > 100:
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# blend with white
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bg = 255.0
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dstep = 1.0 - dstep # 0 = transparent fg; 1 = opaque fg
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else:
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# blend with black
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bg = 0.0
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dstep = 1.0 + dstep; # 0 = transparent fg; 1 = opaque fg
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r = _blendColour(r, bg, dstep)
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g = _blendColour(g, bg, dstep)
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b = _blendColour(b, bg, dstep)
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return wx.Colour(int(r), int(g), int(b))
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