[lazarus] How to implement TCanvas.Pixel[x,y] functionality in 500 easy steps...

[Shane Miller]

How to implement Canvas.Pixels..

If you look at canvas.inc you will see that the function GetPixel already
exists so I'm not sure that it needs to be "implemented".  Perhaps it simply
needs to be debugged.  In getpixel there is a CNSendMessage call that sends
a LM_GetPixel message and a MSG variable to gtkobject.inc.  The LM_GetPixel
causes a call to GetPixel and in that function the PixColor of the
TLMSetGetPixel should be set.

Again, I'm not sure that it's working but it is written already.  The
SetPixel is also written.  Whether it's working or not I'm not sure.  All we
need is someone to debug it for us (put in a few writeln's and see what's
coming out of it).

Shane

----- Original Message -----
From: "Luis R. Hilario" <luis at luis-digital.8m.com>
To: <lazarus at miraclec.com>
Sent: Saturday, February 24, 2001 11:07 AM
Subject: [lazarus] Pixels


> Hello,
>
> Which is the sequence that is due to follow to implement something?
>
> For example:
> How one implemented the rectangles or the lines?
> Which archives are modified first?
>
> I am interested in drawing pixels (and apparently somebody more).
>
> Also this can be useful to learn to implement other things.
>
> Please to enumerate the steps, like is a boy who learns to walk.
> --
>  |-----------------------------|
> | Luis R. Hilario               |
> | http://www.luisdigital.2y.net |
>  |-----------------------------|
>
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