Pixel values from a bitmap

Effo...@landcare.cri.nz (EffordM)

Delphi Developer

Mon, 30 Nov 1998 03:00:00 GMT

Pixel values from a bitmap

I have used loadfromfile() to load a Windows bitmap into a Timage component.
Now I would like to respond to a mouse down event by displaying the pixel
value for the current mouse location - as the
integer used to index the colour in the original bitmap (rather than as the
Tcolor given by the pixel property of the canvas).

Can anyone help me with this?

Thanks

Mads Bondo Dydensbo

Delphi Developer

Sun, 06 Dec 1998 03:00:00 GMT

Re:Pixel values from a bitmap

Quote

>>>>> "EffordM" == EffordM <Effo...@landcare.cri.nz> writes:

EffordM> I have used loadfromfile() to load a Windows bitmap into a
EffordM> Timage component. Now I would like to respond to a mouse
EffordM> down event by displaying the pixel value for the current
EffordM> mouse location - as the integer used to index the colour in
EffordM> the original bitmap (rather than as the Tcolor given by the
EffordM> pixel property of the canvas).

EffordM> Can anyone help me with this?

Look up GetNearestPaletteIndex in the help file
(Might be NearestPaletteIndex or GetPaletteIndex or similar, but you
get the idea ;-)

Good luck.

Mads

--
+----------------------------------------------------------------------+
| Mads Bondo Dydensborg. Student at DIKU, Copenhagen - Denmark. |
| Email: mads...@diku.dk www: http://www.diku.dk/students/madsdyd/ |
+----------------------------------------------------------------------+

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