Cole Tierney <[EMAIL PROTECTED]> wrote: > I'm trying to invert a 16 color indexed greyscale bitmap with imaging > lingo. I thought this would be a no brainer. > > I first tried copyPixels with #notcopy ink. This appears to work, but > there seem to be subtle rounding errors.
Hi Cole, Using the image you sent me, the following seems to work. Note the use of the undocumented value for #dither. on invertImage(anImage) tRect = anImage.rect tPalette = anImage.paletteRef tDepth = anImage.depth tImage = image(tRect.width, tRect.height, tDepth, tPalette) tOptions = [#ink: #notCopy, #dither: 1215] tImage.copyPixels(anImage, tRect, tRect, tOptions) return tImage end This is not a generic solution: it failed with an image that uses the Metallic palette. I hope it is enough to solve your current issue. Cheers, James [To remove yourself from this list, or to change to digest mode, go to http://www.penworks.com/lingo-l.cgi To post messages to the list, email [EMAIL PROTECTED] (Problems, email [EMAIL PROTECTED]). Lingo-L is for learning and helping with programming Lingo. Thanks!]
