Hi - can anyone help me please?
If I load a mono bitmap into a wxBitmap, is there an easy way of finding out whether a pixel is set or unset. Or, for that matter, what value the pixel has in a bitmap of greater depth?
Mike Edmonds
If I load a mono bitmap into a wxBitmap, is there an easy way of finding
out whether a pixel is set or unset.
Or, for that matter, what value the pixel has in a bitmap of greater depth?
Hi
A few minutes longer would have had me figure out
x = wx.Bitmap('black.bmp')
y = wx.ImageFromBitmap(x)
print y.GetGreen(10,10)
print y.GetRed(10,10)
print y.GetBlue(10,10)
0
0
0
and
x = wx.Bitmap('white.bmp')
y = wx.ImageFromBitmap(x)
print y.GetGreen(10,10)
print y.GetRed(10,10)
print y.GetBlue(10,10)
255
255
255
That is good enough for me, but a single call would be better. Any takers?
Mike Edmonds
Mike Edmonds wrote:
>Or, for that matter, what value the pixel has in a bitmap of greater depth?
x = wx.Bitmap('white.bmp')
y = wx.ImageFromBitmap(x)
print y.GetGreen(10,10)
print y.GetRed(10,10)
print y.GetBlue(10,10)
That is good enough for me, but a single call would be better. Any takers?
You can also select the bitmap into a wxMemoryDC and use DC.GetPixel:
**Warning: untested code:
dc = wxMemoryDC()
dc.SelectObject(bitmap)
color = dc.GetPixel()
NOw that I look at, however, if you want the separate r,g,b values,
you'll need to:
(r,g,b) = (color.Red, color.Green, color.Blue)
I think. Most of the wxPython methods that take a wxColor can also take
an (r,g,b) tuple, but it probably doesn't work the other eay around. So
the question becomes: is it better to create a wxImage or a wxMemoryDC?
-Chris
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