getitback needs to be passed W not L (width not the length) but the problem
still exists.
On 2012-01-09, at 4:33 PM, Michael Doub wrote:
> I have been trying to figure out why I have not been able to retrieve valid
> RGB values from an image.
> I decided to generate my own image so I would be able to track down my issue.
> I thought that would
> be straight forward, Several hrs later and i am still at an impasse. I am
> trying to understand why I
> the pixel data, that was just written seems to be corrupted. This occurs on
> the first pixel of the second row
> of pixels.
>
> Could someone take a look and point out where I am going wrong?
> Interestingly enough, if you comment
> out the check with the breakpoint you will get to see the image that seems to
> look just fine.
>
> Thanks
> Mike
>
>
>
> local tData
>
> on mouseUp
> BuildImage
> end mouseUp
>
> On BuildImage
> put empty into tData
> put 320 into W
> put 426 into L
> create image
> put it into tID
> set the width of tID to W
> set the height of tID to L
> put 1 into R
> put 1 into G
> put 0 into B
> repeat with y = 1 to L
> repeat with x =1 to W
> put binaryEncode("CCCC",0,R,G,B) into Pixel
> put Pixel after tData
> get getitback (L, x, y)
> if it <> Pixel then
> breakpoint
> end if
> add 1 to R
> if R = 256 then put 1 into R
> end repeat
> Add 1 to G
> put 1 into R
> if G = 256 then put 1 into G
> end repeat
> set the imageData of tID to tData
> end BuildImage
>
> function getitback W, xx, yy
> put ((yy - 1) * W ) + ((xx - 1) * 4) into myindex
> put charToNum(char myindex + 2 of tData) into RR
> put charToNum(char myindex + 3 of tData) into GG
> put charToNum(char myindex + 4 of tData) into BB
> put binaryEncode("CCCC",0,RR,GG,BB) into it
> return it
> end getitback
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