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Newcomers DBPro Corner / DWORD to RGB?

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Tinkergirl
21
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Joined: 1st Jul 2003
Location: United Kingdom
Posted: 13th Oct 2005 15:21
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Hi all,

Sorry but I had a look through with the search and couldn't find a nice simple way to do this.

I'm using point to get the colour of a pixel on the screen, and it spits out a DWORD. How do I get the red, green and blue parts of that, so I can use it in RGB?

Thanks. Sorry if I'm being slow.
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Antidote
19
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Joined: 18th Mar 2005
Location: San Francisco, CA
Posted: 13th Oct 2005 15:30
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i think there are get red() , get blue() , and get green() commands in DB.

I R tEh Antid0te! ROOOAAAR!
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Tinkergirl
21
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Joined: 1st Jul 2003
Location: United Kingdom
Posted: 13th Oct 2005 15:37
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I'm afraid I can't find them or they're not written like that.

I'm useing DBPro and I can't find any commands in the help with 'green' in them, and "get red()" doesn't highlight and it spits out an error if I try to use it anyway.

Thanks for trying to help, but I fear I'll need more help. :/
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Tinkergirl
21
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Joined: 1st Jul 2003
Location: United Kingdom
Posted: 13th Oct 2005 15:52
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Doh. I figured it out by trial, error, and sacrificing sandwitches to the brain-god.

For those who follow - this is how I did it (and if anyone has a better way of doing it, please tell!)



As you can see, I used the POINT command to get the DWORD colourvalue, and then had to make a memblock to put it in. The fact that it's 4 bytes long, and not three, scares me, but hey. Maybe it's for alpha.

Good luck everyone, and sorry I kind of worked it out so quickly after I posted. I'd just been very scared of memblocks and was convinced I wouldn't be able to manage to do it.

Hope it helps someone else, or I get shouted at for doing it the wrong way
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BatVink
Moderator
21
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Joined: 4th Apr 2003
Location: Gods own County, UK
Posted: 13th Oct 2005 16:10
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That works, but there are easier ways
The fourth channel is alpha, by the way.

You can use
RGBR(colourvalue)
RGBG(colourvalue)
RGBB(colourvalue)

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Tinkergirl
21
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Joined: 1st Jul 2003
Location: United Kingdom
Posted: 13th Oct 2005 18:03
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You know, I saw those, but for some reason the wording of the documentation made me think that they didn't do what I wanted. Oh well, learn something new every day
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Antidote
19
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Joined: 18th Mar 2005
Location: San Francisco, CA
Posted: 13th Oct 2005 18:07
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OK so its not get red() its rgbr().

I R tEh Antid0te! ROOOAAAR!
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