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DarkBASIC Discussion / Getting rgb values from memblock image

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Caleb1994
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Posted: 10th Mar 2009 17:26
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I was bored and messing around with a image and memblocks because i wasn't sure how the memblock image was set up well i fugured it out but just wondering is there a way to get the rgb values from the pixel data? that would make making a fade image thing very very easy lol you could just set all the rgb value down one. well that sounds right in my head idk if it is.
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Ashingda 27
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Posted: 10th Mar 2009 17:38
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You can use this.
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Caleb1994
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Posted: 10th Mar 2009 17:47 Edited at: 10th Mar 2009 18:13
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yay i didn't even know about rgbr,rgbg,rgbb commands thank you i love quick replies thanks ashinga




aahhhh once again my mind has failed me! lol changing the rgb values bye -1 doesn't fade it. it turns the picture yellow lol hmmmm maybe i should look up that other fade function someone made. i just wanna know how it works lol


Edit:

Is there a better way to get the color of a point on the screen then using make memblock from bitmap 100,0 then Color=Memblock float(100,Position) because i tested it and that is about 9 millaseconds slower then the built in point command. i know people have done it before just don't know how.
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BN2 Productions
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Posted: 10th Mar 2009 20:27
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I think you can use memblock dword for the color data, but it only works properly in 32 bit resolution.

For fade, I managed to do it by taking the difference between the two colors, dividing that by 100 (to get what a difference of 1% is) and then multiplied that by the desired percentage. It is slow though, not much you can do about that.

Great Quote:
"Time...LINE??? Time isn't made out of lines...it is made out of circles. That is why clocks are round!" -Caboose
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Caleb1994
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Posted: 11th Mar 2009 00:06
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hmmm interesting. i will try that in just a sec almost done with home work lol


ok i'm jumping around with memblocks sorry but i was just sitting here thinking if you could make a memblock from a image then save the data and load it back it (not very usefull just a question) so i tried well it works but the colors arn't correct they always come out green. course its in 16 bit but thats all paint will do that and 24 i have tried everything any ideas? i love learning things hahahaha
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Quirkyjim
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Posted: 11th Mar 2009 00:11
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Are making sure to skip every fourth byte? That's the alpha value for each picture. The memblock from an image goes like:

R value for 1,1
G value for 1,1
B value for 1,1
Alpha value for 1,1
R value for 2,1
G value for 2,1
B value for 2,1
A value for 2,1
etc...

~QJ
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Caleb1994
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Posted: 11th Mar 2009 01:40 Edited at: 11th Mar 2009 01:41
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oh i though it was one number for each pixel. like color value for pixel 1,2,3 so on. i was skipping 4 bytes because of the dword takes for bytes hmmm this is different then i thought. i will look into this


edit what is the alpha value?
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Ashingda 27
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Posted: 11th Mar 2009 02:07
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Alpha is for transparency.
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Caleb1994
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Posted: 11th Mar 2009 02:16
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oh ok i didn't know that. so theoreticly you could use this to change the default transperant color (black) for db? lol i like to learn random ways around random things
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Quirkyjim
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Posted: 11th Mar 2009 22:03
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No, it's like in a PNG, where you can have totally transparent pixels. The Alpha value ranges from 0 to 255, where 255 is completely opaque, and 0 in completely transparent.

~QJ
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Caleb1994
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Posted: 12th Mar 2009 17:46
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oh ok i get it thnaks well i'm not going to be coding for a while. my "mommy" is taking my computer cuz i wasn't doing homework lol
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That1Smart Guy
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Posted: 15th Mar 2009 05:09
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i wouldnt admit to too many people caleb
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Caleb1994
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Posted: 15th Mar 2009 05:45
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hahaha ya i know lol

New Site! Check it out \/
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BN2 Productions
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Posted: 16th Mar 2009 05:00
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Perhaps you could play your cards right so that you NEED your computer to do homework...

Great Quote:
"Time...LINE??? Time isn't made out of lines...it is made out of circles. That is why clocks are round!" -Caboose
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Caleb1994
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Posted: 16th Mar 2009 05:12
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hahahaha ya or i could just do it. tried that and geuss what!? it works! lol

New Site! Check it out \/
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